20-F

As filed with the Securities and Exchange Commission on April 30, 2024

UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 20-F

☐ REGISTRATION STATEMENT PURSUANT TO SECTION 12(b) OR (g) OF THE SECURITIES EXCHANGE ACT OF 1934

OR

☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

   For the fiscal year ended December 31, 2023

OR

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

OR

☐ SHELL COMPANY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

   Date of event requiring this shell company report           

   For the transition period from     to     

Commission file number 1-14926

KT Corporation

(Exact name of Registrant as specified in its charter)

KT Corporation	The Republic of Korea
(Translation of Registrant’s name into English)	(Jurisdiction of incorporation or organization)

KT Gwanghwamun Building East

33, Jong-ro 3-Gil, Jongno-gu

03155 Seoul, Korea

(Address of principal executive offices)

Min Jang

KT Gwanghwamun Building East

33, Jong-ro 3-Gil, Jongno-gu

03155 Seoul, Korea

Telephone: +82-2-3495-3557; E-mail: ktir@kt.com

(Name, telephone, e-mail and/or facsimile number and address of company contact person)

Securities registered or to be registered pursuant to Section 12(b) of the Act.

Title of each class	Trading symbol	Name of each exchange on which registered
American Depositary Shares, each representing one-half of one share of ordinary share	KT	New York Stock Exchange, Inc.
Ordinary share, par value ￦5,000 per share*	KT	New York Stock Exchange, Inc.*

Securities registered or to be registered pursuant to Section 12(g) of the Act.

None

Securities for which there is a reporting obligation pursuant to Section 15(d) of the Act.

None

As of December 31, 2023, there were 246,413,422 ordinary shares, par value ￦5,000 per share, outstanding

(not Including 11,447,338 ordinary shares held by the registrant as treasury shares)

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes ☒ No ☐

If this report is an annual or transition report, indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934. Yes ☐ No ☒

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☒ No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer ☒ Accelerated filer ☐ Non-accelerated filer ☐ Emerging growth company ☐

If an emerging growth company that prepares its financial statements in accordance with U.S. GAAP, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report. Yes ☒ No ☐

If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing reflect the correction of an error to previously issued financial statements. Yes ☐ No ☒

Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by any of the registrant’s executive officers during the relevant recovery period pursuant to §240.10D-1(b). Yes ☐ No ☒

Indicate by check mark which basis of accounting the registrant has used to prepare the financial statements included in this filing. U.S. GAAP ☐ IFRS ☒ Other ☐

If “Other” has been checked in response to the previous question, indicate by check mark which financial statement item the registrant has elected to follow. Item 17 ☐ Item 18 ☐

If this is an annual report, indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐ No ☒

* Not for trading, but only in connection with the registration of the American Depositary Shares.

TABLE OF CONTENTS

Part I			1
Item 1.	Identity of Directors, Senior Managers and Advisers		1
	Item 1.A.	Directors and Senior Management	1
	Item 1.B.	Advisers	1
	Item 1.C.	Auditors	1
Item 2.	Offer Statistics and Expected Timetable		1
	Item 2.A.	Offer Statistics	1
	Item 2.B.	Method and Expected Timetable	1
Item 3.	Key Information		2
	Item 3.A.	[RESERVED]	2
	Item 3.B.	Capitalization and Indebtedness	2
	Item 3.C.	Reasons for the Offer and Use of Proceeds	2
	Item 3.D.	Risk Factors	2
Item 4.	Information on the Company		20
	Item 4.A.	History and Development of the Company	20
	Item 4.B.	Business Overview	21
	Item 4.C.	Organizational Structure	44
	Item 4.D.	Property, Plant and Equipment	44
Item 4A.	Unresolved Staff Comments		46
Item 5.	Operating and Financial Review and Prospects		46
	Item 5.A.	Operating Results	46
	Item 5.B.	Liquidity and Capital Resources	60
	Item 5.C.	Research and Development, Patents and Licenses, Etc.	63
	Item 5.D.	Trend Information	63
	Item 5.E.	Critical Accounting Estimates	63
Item 6.	Directors, Senior Management and Employees		63
	Item 6.A.	Directors and Senior Management	63
	Item 6.B.	Compensation	67
	Item 6.C.	Board Practices	68
	Item 6.D.	Employees	69
	Item 6.E.	Share Ownership	71
	Item 6.F.	Disclosure of a Registrant’s Action to Recover Erroneously Awarded Compensation	72

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Item 7.	Major Shareholders and Related Party Transactions		73
	Item 7.A.	Major Shareholders	73
	Item 7.B.	Related Party Transactions	73
	Item 7.C.	Interests of Experts and Counsel	73
Item 8.	Financial Information		73
	Item 8.A.	Consolidated Statements and Other Financial Information	73
	Item 8.B.	Significant Changes	75
Item 9.	The Offer and Listing		75
	Item 9.A.	Offer and Listing Details	75
	Item 9.B.	Plan of Distribution	75
	Item 9.C.	Markets	75
	Item 9.D.	Selling Shareholders	75
	Item 9.E.	Dilution	76
	Item 9.F.	Expenses of the Issuer	76
Item 10.	Additional Information		76
	Item 10.A.	Share Capital	76
	Item 10.B.	Memorandum and Articles of Association	76
	Item 10.C.	Material Contracts	82
	Item 10.D.	Exchange Controls	82
	Item 10.E.	Taxation	86
	Item 10.F.	Dividends and Paying Agents	95
	Item 10.G.	Statements by Experts	95
	Item 10.H.	Documents on Display	95
	Item 10.I.	Subsidiary Information	95
	Item 10.J.	Annual Report to Security Holders	95
Item 11.	Quantitative and Qualitative Disclosures About Market Risk		95
Item 12.	Description of Securities Other than Equity Securities		98
	Item 12.A.	Debt Securities	98
	Item 12.B.	Warrants and Rights	98
	Item 12.C.	Other Securities	98
	Item 12.D.	American Depositary Shares	98
Part II			100
Item 13.	Defaults, Dividend Arrearages and Delinquencies		100
Item 14.	Material Modifications to the Rights of Security Holders and Use of Proceeds		100

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Item 15.	Controls and Procedures	100
Item 16.	[Reserved]	101
Item 16A.	Audit Committee Financial Expert	101
Item 16B.	Code of Ethics	101
Item 16C.	Principal Accountant Fees and Services	101
Item 16D.	Exemptions from the Listing Standards for Audit Committees	102
Item 16E.	Purchases of Equity Securities by the Issuer and Affiliated Purchasers	103
Item 16F.	Change in Registrant’s Certifying Accountant	103
Item 16G.	Corporate Governance	103
Item 16H.	Mine Safety Disclosure	104
Item 16I.	Disclosure regarding Foreign Jurisdictions that Prevent Inspections	104
Item 16J.	Insider Trading Policies	104
Item 16K.	Cybersecurity	105
Part III		108
Item 17.	Financial Statements	108
Item 18.	Financial Statements	108
Item 19.	Exhibits	109

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PRESENTATION

All references to “Korea” or the “Republic” contained in this annual report mean the Republic of Korea. All references to the “Government” are to the government of the Republic of Korea. All references to “we,” “us” or the “Company” are to KT Corporation and, as the context may require, its subsidiaries.

Our consolidated financial statements as of December 31, 2022 and 2023 and for each of the years in the three-year period ended December 31, 2023 and related notes thereto (“Consolidated Financial Statements”) are prepared in accordance with International Financial Reporting Standards (“IFRS”) as issued by the International Accounting Standards Board (“IASB”).

All references to “Won” or “￦” in this annual report are to the currency of the Republic. All references to “Dollars,” “$,” “US$” or “U.S. dollars” are to the currency of the United States of America. All references to “Euro” or “EUR” are to the currency of the European Union. All references to “SGD” or “Singapore dollars” are to the currency of the Republic of Singapore. Our monetary assets and liabilities denominated in foreign currency are translated into Won at the market average exchange rate announced by Seoul Money Brokerage Services, Ltd. (the “Market Average Exchange Rate”) on the balance sheet dates, which were, for U.S. dollars, ￦1,185.5 to US$1.00, ￦1,267.3 to US $1.00, and ￦1,289.3 to US $1.00 on December 31, 2021, 2022 and 2023, respectively.

Any discrepancies in any table between totals and the sums of the amounts listed are due to rounding.

All market share data contained in this annual report, unless otherwise specified, are based on the number of subscribers announced by the Ministry of Science and ICT (the “MSIT”), the Korea Communications Commission (the “KCC”) or the Korea Telecommunications Operators Association.

PART I

Item 1.  Identity of Directors, Senior Managers and Advisers

Item 1.A.  Directors and Senior Management

Not applicable.

Item 1.B.  Advisers

Not applicable.

Item 1.C.  Auditors

Not applicable.

Item 2.  Offer Statistics and Expected Timetable

Item 2.A.  Offer Statistics

Not applicable.

Item 2.B.  Method and Expected Timetable

Not applicable.

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Item 3.  Key Information

Item 3.A.  [RESERVED]

Item 3.B.  Capitalization and Indebtedness

Not applicable.

Item 3.C.  Reasons for the Offer and Use of Proceeds

Not applicable.

Item 3.D.  Risk Factors

You should carefully consider the following risk factors, which have been identified by us.

Risks Relating to Our Business

Competition in each of our principal business areas is intense.

We face significant competition in each of our principal business areas. In the markets for mobile services, fixed-line services and media and content services, we compete primarily with SK Telecom Co., Ltd. (“SK Telecom”) and LG Uplus Corp. (“LG U+”) (including their affiliates). In the past two decades, considerable consolidation in the telecommunications industry has occurred, resulting in the current competitive landscape comprising three network service providers that offer a wide range of telecommunications and data communications services. In recent years, each of our primary competitors has acquired a leading cable TV operator in Korea to significantly increase their market shares in the pay TV market, which has further intensified competition.

To a lesser extent, we also compete with various value-added service providers and network service providers as classified under the Framework Act on Telecommunications and the Telecommunications Business Act, including mobile virtual network operators (“MVNOs”) that lease mobile networks and offer mobile services, VoIP service providers that offer Internet telephone services, cable TV operators, text messaging service providers (particularly Kakao Corp. (“Kakao”)) and voice resellers, many of which offer competing services at lower prices. We also face changes in the evolving landscape of the market for media and content services arising from the increasing popularity of global over-the-top (“OTT”) media services such as Netflix. In January 2023, the MSIT announced plans to encourage a fourth service provider to enter the Korean mobile service market by awarding a bandwidth license for the use of the 28 GHz spectrum and provide various measures to support the competitiveness of the new market entrant. In January 2024, Stage X, a consortium led by Stage Five, won the auction for 800 MHz of bandwidth license on the 28 GHz spectrum. Stage X is expected to commence service in the first half of 2025 to become the fourth nationwide mobile service provider, subject to satisfaction of applicable regulatory requirements. The entrance of new service providers in the markets for mobile services, fixed-line services and media and content services may further increase competition, as well as cause downward price pressure on the fees we charge for our services. For a discussion of our market shares in key markets, please see “Item 4. Information on the Company—Item 4.B. Business Overview—Competition.”

We compete primarily based on our service performance, quality and reliability, ability to accurately identify and respond to evolving consumer demand, and pricing. With the launch of 5G mobile services in April 2019, competition has further intensified among the three network service providers, which has resulted in an increase in marketing expenses as well as additional capital

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expenditures related to implementing 5G mobile services. Mobile service providers also grant subsidies or subscription discount rates to subscribers who purchase new handsets and agree to a minimum subscription period, and we compete also based on such amounts. We and SK Telecom have been designated as market-dominating business entities in the local telephone and mobile markets, respectively, under the Telecommunications Business Act. Under this Act, a market-dominating business entity may not engage in any act of abuse, such as unreasonably interfering with business activities of other business entities, hindering unfairly the entry of newcomers or substantially restricting competition to the detriment of the interests of consumers. In addition, changes in our local telephone rates and mobile rates of SK Telecom are required to be reported to the MSIT, which has 15 days to object to such changes. The KCC has also issued guidelines on fair competition of the telecommunications companies.

In the financial services market, our credit and check cards issued under the “BC Card” brand pursuant to co-brand agreements with member companies compete principally with cards issued by other leading credit card companies in Korea with their own merchant payment networks, such as Shinhan Card, Hyundai Card and Samsung Card. Our member companies that issue co-branded credit or check cards include Woori Card, NH Card, Industrial Bank of Korea and KB Kookmin Card. We also compete with service providers that provide outsourcing services related to business operations of credit card companies. Competition in the credit card and check card businesses has increased substantially as existing credit card companies, consumer finance companies and other financial institutions in Korea have made significant investments and engaged in aggressive marketing campaigns and promotions for their credit and check cards, as well as investing in operational infrastructure that may reduce the need for our outsourcing services.

Our inability to adapt to changes in the competitive landscape and compete against our competitors in our principal business areas could have a material adverse effect on our business, financial condition and results of operations.

Failure to renew existing bandwidth licenses, acquire adequate additional bandwidth licenses or use our bandwidth efficiently may adversely affect our mobile telecommunications business and results of operations.

One of the principal limitations on a wireless network’s subscriber capacity is the amount of bandwidth allocated to a service provider. We have acquired a number of licenses to secure bandwidth capacity to provide our broad range of services, for which we typically make an initial payment as well as pay usage fees during the license period. The MSIT reserves the right to reallocate bandwidths in order to address the changing needs for bandwidth capacity of mobile service providers, the consideration for which may depend on the extent of the buildout of the service provider’s telecommunications network to utilize the relevant bandwidth. For example, in recent years, the MSIT cancelled the bandwidth licenses for the use of the 28 GHz spectrum that had been issued to us, SK Telecom and LG U+, noting the failure to meet certain agreements made with the MSIT at the time of the license allocations. For all of our bandwidth licenses, we made aggregate payments of ￦603 billion in 2021, ￦319 billion in 2022 and ￦327 billion in 2023. For our outstanding payment obligations relating to our bandwidth licenses, see “Item 5. Operating and Financial Review and Prospects—Item 5.A. Operating Results—Overview—Acquisition of New Bandwidth Licenses and Usage Fees.” For more information on our bandwidth licenses, see “Item 4. Information on the Company—Item 4.D. Property, Plant and Equipment—Mobile Networks.”

The growth of our mobile telecommunications business and the increase in usage of wireless data transmission services have significantly increased the utilization of our bandwidth, because wireless data applications are generally more bandwidth-intensive than voice services. The current trend of increasing data transmission use and the increasing sophistication of multimedia contents are

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likely to put additional strain on the bandwidth capacity of mobile service providers. In the event we are unable to maintain sufficient bandwidth capacity by renewing existing bandwidth licenses, receiving additional bandwidth allocation or cost-effectively implementing technologies that enhance the efficiency of our bandwidth usage, our subscribers may perceive a general decrease in the quality of mobile telecommunications services. No assurance can be given that bandwidth constraints will not adversely affect the growth of our mobile telecommunications business. Furthermore, we may be required to make substantial payments to acquire additional bandwidth capacity in order to meet increasing bandwidth demand, which may adversely affect our business, financial condition and results of operations.

Introduction of new services poses challenges and risks to us.

The telecommunications industry is characterized by continual advances and improvements in telecommunications technology, and we have been continually researching and implementing technology upgrades and additional telecommunications services to maintain our competitiveness. For example, we have been building more advanced mobile telecommunications networks based on 5G technology and commenced providing commercial 5G mobile services in April 2019. Since then, we have expanded our coverage to all major cities in Korea, and we plan to further expand the coverage nationwide by mid-2024 and increase the transmission speed of our 5G services. As we continue to compete with SK Telecom and LG U+ to improve network quality, introduce new services and accommodate increased data usage of subscribers, we may incur significant expenses to acquire additional bandwidth licenses and incur significant capital expenditures to build out and improve our network. We have made extensive efforts to develop advanced technologies as well as provide a variety of services with enhanced speed, latency and connectivity. Furthermore, we are also continually upgrading our broadband network to enable better fiber-to-the-home (“FTTH”) connection, which enhances data transmission speed and connection quality.

No assurance can be given that our new services will gain broad market acceptance such that we will be able to derive revenue from such services to justify the license fees, capital expenditures and other investments required to provide such services. If our new services do not gain broad market acceptance, our business, financial condition and results of operations may be adversely affected.

We may not be able to successfully pursue our strategy to acquire businesses and enter into joint ventures that complement or diversify our current business, and we may need to incur additional debt to finance such expansion activities.

One key aspect of our overall business strategy calls for acquisitions of businesses and entering into joint ventures that complement or diversify our current businesses. For example, in September 2021, KT Skylife Co., Ltd. (“KT Skylife”), in which we held a 50.3% interest as of December 31, 2023, completed its acquisition of a 100.00% interest in Hyundai HCN Co., Ltd. (“HCN”), which is Korea’s fifth largest cable operator.

While we plan to continue our search for suitable acquisition and joint venture opportunities, we cannot provide assurance that we will be able to identify attractive opportunities or that we will successfully complete the transactions without encountering administrative, technical, political, financial or other difficulties, or at all. Even if we were to successfully complete the transactions, the success of an acquisition or a joint venture depends largely on our ability to achieve the anticipated synergies, cost savings and growth opportunities from integrating the business of the acquired company or the joint venture with our current businesses. There can be no assurance that we will achieve the anticipated benefits of the transaction, which may adversely affect our business, financial condition and results of operations. Pursuing acquisitions or joint venture transactions also requires significant capital, and as we pursue further growth opportunities for the future, we may need to raise

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additional capital through incurring loans or through issuances of bonds or other securities in the international capital markets.

The Korean telecommunications and Internet-related industries are subject to extensive Government regulations, and changes in Government policy relating to these industries could have a material adverse effect on our operations and financial condition.

The Government, primarily through the MSIT and the KCC, has the authority to regulate the telecommunications industry in Korea. The MSIT and the KCC also have the authority to regulate the pay TV industry under the Korea Broadcasting Act and the Internet Multimedia Broadcasting Services Act, which cover our IPTV services, our satellite TV services provided through KT Skylife (in which we held a 50.3% interest as of December 31, 2023), and cable TV services that we provide through HCN, in which KT Skylife holds a 100.0% interest. See “Item 4. Information on the Company—Item 4.B. Business Overview—Regulation.” The MSIT’s policy is to promote competition through measures designed to prevent the dominant service provider in any such market from exercising its market power in a way that would prevent the emergence and development of viable competitors. Under such regulations, if a network service provider has the largest market share for a specified type of telecommunications service and its revenue from that service for the previous year exceeds a specific revenue amount set by the MSIT, such entity may be designated as a market-dominating business entity that may not engage in any act of abuse, such as unreasonably interfering with business activities of other business entities, hindering unfairly the entry of newcomers or substantially restricting competition to the detriment of the interests of consumers. The KCC has also issued guidelines on fair competition of telecommunications and Internet-related companies. In addition, the Government sets the policies regarding the use of radio frequency bandwidths and allocates the bandwidths used for wireless telecommunications by an auction process or by a planned allocation.

We and SK Telecom have been designated as market-dominating business entities in the local telephone and mobile markets, respectively. Accordingly, changes in our local telephone rates and mobile rates of SK Telecom are required to be reported to the MSIT, which has 15 days to object to such changes. The form of our standard agreement for providing local network services and each agreement for interconnection with other service providers must also be reported to the MSIT. Although we compete freely with other network service providers in terms of rate plans for our principal telecommunications and Internet-related services except for rates we charge for local calls, our inability to freely set our local telephone service rates may hurt profits from such businesses and impede our ability to compete effectively against our competitors. In addition, the MSIT may periodically announce policy guidelines that telecommunications companies are recommended to take into consideration in their telecommunications and Internet-related businesses. In recent years, the Government has been promoting further diversification of mobile rate plans, in part to mitigate the burden of rising household expenditures. In response, the three network service providers in Korea, including us, have launched additional lower-priced mobile rate plans.

In January 2024, the Government announced its plan to repeal the Mobile Device Distribution Improvement Act, which remains subject to passage by the National Assembly of the Republic of Korea, in order to encourage mobile service providers to offer differentiated benefits to customers. Under the Mobile Device Distribution Improvement Act, a subscriber is entitled to receive either a designated handset subsidy related to the purchase of a recently released mobile phone, or a designated discount on the mobile service subscription rate. In connection with such policy, the Government amended the Enforcement Decree of the Mobile Device Distribution Improvement Act in March 2024, pursuant to which mobile service providers may provide more liberal subsidies to subscribers that are switching their mobile service providers based on certain criteria specified by the KCC, including the estimated profit margins of the mobile service providers and subscribers’ costs of switching their service providers. Any such amendments to, or the repeal of, the Mobile Device

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Distribution Improvement Act may have a material impact on the competitive landscape of the mobile telecommunications industry as mobile service providers are given more flexibility to provide handset subsidies or discounts, which may in turn increase expenses.

The Government may pursue additional measures to regulate the markets in which we compete. There can be no assurance that we will not adopt additional measures that reduce rates charged to our subscribers as well as adjustments to our handset subsidies and other measures in the future to comply with regulatory requirements or the Government’s policy guidelines.

The MSIT may revoke our licenses or suspend any of our businesses if we fail to comply with its rules, regulations and corrective orders, including the rules restricting beneficial ownership and control or any violation of the conditions of our licenses. Alternatively, in lieu of suspension of our business, the MSIT may levy a monetary penalty of up to 3.0% of the average of our annual revenue from telecommunications services relating to the violation for the preceding three fiscal years. From time to time, we have been imposed fines for violation of regulations imposed by MSIT and KCC. There is no guarantee that the laws and regulations to which we are or become subject will not have a material adverse effect on our business, financial condition or results of operations.

COVID-19 and any possible occurrences of other types of widespread infectious diseases could materially and adversely affect our business, financial condition or results of operations.

COVID-19, an infectious disease caused by severe acute respiratory syndrome coronavirus 2, was declared a “pandemic” by the World Health Organization in March 2020. The global outbreak of COVID-19 had led to global economic and financial disruptions. While we do not believe that COVID-19 had a material adverse impact on our business, risks associated with COVID-19 or other types of widespread infectious diseases may include:

• increase in unemployment among our customers who may not be able to meet payment obligations, which in turn may decrease demand for our products and services;

• service disruptions, outages and performance problems due to capacity constraints caused by an overwhelming number of people accessing our services simultaneously;

• disruptions in the supply of mobile handsets or telecommunications equipment from our vendors;

• fluctuations of the Won against major foreign currencies, which in turn may impact the cost of imported equipment necessary for expansion and enhancement of our telecommunications infrastructure; and

• impairments in the fair value of our investments in companies that may be adversely affected by the pandemic.

In the event that a future occurrence of COVID-19 or occurrences of other types of widespread infectious diseases cannot be effectively and timely contained, our business, financial condition and results of operations may be materially and adversely affected.

Legal cases involving our political donations and other incidents and allegations could have a material adverse effect on our business, reputation and stock price.

In January 2018, the Korean police commenced an investigation in connection with the allegations that our former executives and employees violated the Political Funds Act of Korea, by

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making certain donations to various lawmakers using corporate funds. In November 2021, the Seoul Central District Prosecutor’s Office decided not to indict Chang-gyu Hwang, our previous chief executive officer, on charges that include violating the Political Funds Act, but indicted four other former executives in our Corporate Relations Division for violation of such laws as well as us for violation of the Political Funds Act. In June 2022, the Seoul Central District Court (i) sentenced the four former executives to suspended prison terms ranging between six to ten months on probation for two years and (ii) imposed a penalty of ￦10 million on us. The four former executives did not appeal such rulings, which became final and conclusive. We appealed the decision of the Seoul Central District Court, which appeal was dismissed by the Seoul High Court in February 2023. In February 2023, we appealed such decision to the Supreme Court, which appeal was dismissed by the Supreme Court in September 2023. Accordingly, the decision of the Seoul Central District Court became final and conclusive.

In November 2021, the Seoul Central District Prosecutor’s Office also issued a summary indictment against our former representative director and chief executive officer, Hyeon-mo Ku, and nine other former executive officers, who permitted using their names, for violating charges that include violation of the Political Funds Act and embezzlement. In February 2022, after a summary judgment was issued, our 10 former executive officers filed for a formal trial. In July 2023, with respect to alleged violation of the Political Funds Act, the Seoul Central District Court found all 10 former executives guilty and imposed monetary penalties on each person ranging from ￦3 million to ￦7 million. The Seoul Central District Prosecutor’s Office appealed such decisions, which remain pending at the Appellate Division of the Seoul Central District Court. In October 2023, with respect to alleged violation of embezzlement, the Seoul Central District Court found all 10 former executives guilty and imposed monetary penalties on each person ranging from ￦2 million to ￦3 million. The Seoul Central District Prosecutor’s Office and some of the former executive officers appealed such decisions, which remain pending at the Appellate Division of the Seoul Central District Court. 

In November 2022, the KT New Labor Union and the People’s Solidarity for Participatory Democracy filed a criminal complaint with the Seoul Central District Prosecutor’s Office against our former chief executive officer, Hyeon-mo Ku, and our board of directors, alleging a criminal breach of fiduciary duty related to (i) a settlement with the U.S. Securities and Exchange Commission (the “SEC”) to resolve its investigation (described below) and (ii) inaction to take responsibility for alleged violation of the Political Funds Act by our current and former executives described above. This matter is currently being investigated by the Seoul Central District Prosecutor’s Office.

In March 2023, a civic group filed a complaint with the Seoul Central District Prosecutor’s Office against Hyeon-mo Ku, our former chief executive officer, and Kyoung-Lim Yun, our former president, alleging breach of fiduciary duty in connection with various matters, particularly (i) their alleged involvement in Hyundai Motor Company’s acquisition of AirPlug Co., Ltd., a company operated by the brother of Hyeon-mo Ku and (ii) Hyeon-mo Ku’s alleged inappropriate funneling of subcontracting work of KT Telecop Co., Ltd. to KDFS Co., Ltd., a facility management company. This matter is currently being investigated by the Seoul Central District Prosecutor’s Office.

In February 2022, we entered into a settlement (the “Settlement”) with the SEC to resolve its investigation, among others, regarding charitable and political donations and other incidents and allegations, including matters connected to a scandal involving Ms. Soon-sil Choi, a confidante of former President Geun-hye Park, and certain payments made by certain of our employees between 2014 and 2018 with respect to procurement of two government contracts in Vietnam. Pursuant to the Settlement, which resolves these matters, and without admitting or denying any of the SEC’s findings (except for the SEC’s jurisdiction over us and the subject matter of the proceedings), we consented to the entry of an order in which the SEC made findings and ordered, pursuant to Section 21C of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), that we cease and desist from

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committing or causing any violations and any future violations of the books and records and internal accounting control provisions of the U.S. Foreign Corrupt Practices Act (the “FCPA”) – Sections 13(b)(2)(A) and 13(b)(2)(B) of the Exchange Act. As part of the Settlement, we paid disgorgement of approximately $2.8 million (including prejudgment interest) and a civil penalty of $3.5 million to the SEC, and agreed to periodically report to the SEC staff for a two year term the status of our remediation and implementation of compliance measures for ensuring compliance with the FCPA and other applicable anti-corruption laws, which period was completed in April 2024. There can be no assurance that such development or any further developments relating to the above-mentioned matters, including adverse publicity, will not adversely affect our business, financial results, reputation or stock price.

Cybersecurity breaches may expose us to significant legal and financial exposure, damage to our reputation and a loss of confidence of our customers.

Our business involves the storage and transmission of large amounts of confidential information of our subscribers and cardholders, and cybersecurity breaches expose us to a risk of loss of this information, which may lead to improper use or disclosure of such information, ensuing potential liability and litigation, any of which could harm our reputation and adversely affect our business. Even though we strive to take all steps we believe are necessary to protect personal information, hardware, software or applications we develop or procure from third parties may contain defects or other problems that could unexpectedly compromise information security. For a discussion of our cybersecurity risk management and strategy, see “Item 16K. Cybersecurity.” Unauthorized parties may also attempt to circumvent our security measures to gain access to our systems or facilities through fraud, trickery or other forms of deceiving our employees, contractors and temporary staff. In addition, because the techniques used to obtain unauthorized access or sabotage systems change frequently and may be difficult to detect for long periods of time, we may be unable to anticipate these techniques or implement adequate preventive measures.

In the past, we have experienced cyber-attacks of varying degrees from time to time, including theft of personal information of our subscribers by third parties that have led to lawsuits and administrative actions against us alleging that the leak was related to our mismanagement of subscribers’ personal information. If we experience additional significant cybersecurity breaches or fail to detect and appropriately respond to significant cybersecurity breaches, we could be subject to additional government enforcement actions, regulatory sanctions and litigation in the future. In addition, our subscribers and cardholders could lose confidence in our ability to protect their personal information, which could cause them to discontinue using our services altogether. Furthermore, adverse final determinations, decisions or resolutions regarding such matters could encourage other parties to bring related claims and actions against us. Accordingly, our failure to prevent cybersecurity breaches may materially and adversely impact our business, financial condition and results of operations.

Our business and performance may be harmed by a disruption in our services due to failures in or changes to our systems, or by our failure to timely and effectively expand and upgrade our technology and infrastructure.

Our reputation and ability to attract, retain, and serve our subscribers, cardholders and other business partners are dependent in large part upon the reliable performance of our services and the underlying technical infrastructure. Our telecommunications network systems and information technology systems may not be adequately designed with the necessary reliability and redundancy to avoid performance delays or outages that could be harmful to our business. We have experienced, and may in the future experience, service disruptions, outages and other performance problems due to a variety of factors, including infrastructure changes, human or software errors, hardware failures, capacity constraints due to an overwhelming number of people accessing our services simultaneously,

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computer viruses, power losses, fraud and security attacks. Our technical infrastructure is also vulnerable to the risk of damage from natural and other disasters, such as fires, earthquakes, floods, and typhoons, as well as from acts of terrorism and other criminal acts. For example, in October 2021, a network maintenance error temporarily disrupted our broadband Internet services nationwide and some of our telecommunications services for approximately 1.5 hours.

As the numbers of our subscribers and cardholders increase and as our customers access, download and transmit increasing volumes of media contents as well as engage in increasing volumes of financial transactions, we may be required to expand and upgrade our technology and infrastructure to continue to reliably deliver our services. We cannot provide assurance that we will be able to expand and upgrade our technology and infrastructure to meet user demand in a timely manner, or on favorable economic terms. We purchase telecommunications network and other equipment from a limited number of key suppliers, and any discontinuation or interruption in the availability of equipment from our key suppliers for any reason could have an adverse effect on our operations. If our users are unable to readily access our services or access is disrupted, users may seek other service providers instead, and may not return to our services or use our services as often in the future. This would negatively impact our ability to attract subscribers, cardholders and other business partners as well as increase engagement of our customers. To the extent that we do not effectively address capacity constraints, upgrade our systems as needed or continually develop our technology and infrastructure to accommodate actual and anticipated changes in our customers’ needs, our business, financial condition and results of operations may be harmed.

Our intellectual property rights are valuable, and our inability to protect them could reduce the value of our products, services and brands.

Our trade secrets, trademarks, copyrights, patents and other intellectual property rights are important assets for us. We rely on, and expect to continue to rely on, a combination of confidentiality and license agreements with our employees, consultants and third parties with whom we have relationships, as well as trademark, trade dress, domain name, copyright, trade secret and patent laws, to protect our brands and other intellectual property rights. However, various events outside of our control may pose a threat to our intellectual property rights, as well as to our products, services and technologies. For example, we may fail to obtain effective intellectual property protection, or effective intellectual property protection may not be available, in every country in which our services are available. Also, the efforts we have taken to protect our intellectual property rights may not be sufficient or effective, and any of our intellectual property rights may be challenged, which could result in them being narrowed in scope or declared invalid or unenforceable. There can be no assurance that our intellectual property rights will be sufficient to protect against others offering services that are substantially similar to ours and compete with our business.

We also rely on non-patented proprietary information and technology, such as trade secrets, confidential information, know-how and technical information. While in certain cases we have agreements in place with employees and third parties that place restrictions on the use and disclosure of such intellectual property, these agreements may be breached, or such intellectual property may otherwise be disclosed or become known to our competitors, which could cause us to lose competitive advantages resulting from such intellectual property.

We are also pursuing registration of trademarks and domain names in Korea and in select jurisdictions outside of Korea. Effective protection of trademarks, domain names and other intellectual property is expensive and difficult to maintain, both in terms of application and registration costs as well as the costs of defending and enforcing those rights.

We also seek to obtain patent protection for some of our technology, and we have filed various applications in Korea and elsewhere for protection of certain aspects of our intellectual property and

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currently hold a number of issued patents in multiple jurisdictions. We may be unable to obtain patent or trademark protection for our technologies and brands, and our existing patents and trademarks, and any patents or trademarks that may be issued in the future, may not provide us with competitive advantages or distinguish our products and services from those of our competitors. In addition, any patents and trademarks may be contested, circumvented, or found unenforceable or invalid, and we may not be able to prevent third parties from infringing, diluting or otherwise violating them. Significant infringements of our intellectual property rights, and limitations on our ability to assert our intellectual property rights against others, could harm our ability to compete and our business, financial condition and results of operations could be adversely affected.

We may become party to intellectual property rights claims in the future that may be expensive and time consuming to defend, and such claims, if resolved adversely, could have a significant impact on our business.

Telecommunications and information technology companies own large numbers of patents, copyrights, trademarks, licenses and trade secrets, and frequently enter into litigation based on allegations of infringement, misappropriation or other violations of intellectual property or other rights. In addition, various “non-practicing entities” that own intellectual property rights often attempt to aggressively assert claims in order to extract payments from companies like us. From time to time, we have received, and may receive in the future, claims from third parties which allege that we have infringed upon their intellectual property rights. Furthermore, from time to time, we may introduce or acquire new services or content, including in areas where we currently do not compete, which could increase our exposure to intellectual property claims from competitors and non-practicing entities.

As we face increasing competition, the number and scope of intellectual property claims against us may grow. Any claim or litigation alleging that we have infringed or otherwise violated intellectual property or other rights of third parties, with or without merit, and whether or not settled out of court or determined in our favor, could be time consuming and costly to address and resolve, and could divert the time and attention of our management and technical personnel. The outcome of any litigation is inherently uncertain, and there can be no assurance that favorable final outcomes will be obtained. In addition, plaintiffs may seek, and we may become subject to, preliminary or provisional rulings in the course of any such litigation, including potential preliminary injunctions requiring us to cease some or all of our operations.

If any litigation to which we are a party is resolved adversely, we may be subject to an unfavorable judgment that may not be reversed upon appeal. The terms of any such judgment or any settlement may require us to cease some or all of our operations, pay substantial amounts to the other party or seek licensing arrangements. If we are required or choose to enter into royalty or licensing arrangements, such arrangements may not be available on commercially reasonable terms, or at all. In addition, the development or procurement of alternative technology could require significant effort and expense or may not be feasible. Accordingly, an unfavorable resolution of any intellectual property rights claims could adversely affect our business, financial condition and results of operations.

We rely on key researchers and engineers, and the loss of the services of any such key personnel or the inability to attract and retain replacements may negatively affect our business.

Our success depends to a significant extent upon the continued service of our research and development and engineering personnel, and on our ability to continue to attract, retain and motivate qualified researchers and engineers. In particular, our focus on leading the market in introducing new telecommunications and Internet-related services has meant that we must aggressively recruit engineers with expertise in cutting-edge technologies. Any loss or interruption of the services of these

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individuals, whether from retirement, loss to competitors or other causes, or failure to attract and retain other qualified new personnel, could prevent us from effectively executing our business strategy, cause us to lose key business relationships, or otherwise materially affect our operations.

Government regulation of the credit card industry may adversely affect the operations of BC Card in which we held a 69.5% interest as of December 31, 2023.

Due to the rapid growth of the credit card market and rising consumer debt levels in Korea, the Government has heightened its regulatory oversight of the credit card industry in recent decades. In particular, the FSC and the Financial Supervisory Service (“FSS”) have adopted a variety of regulations governing the credit card industry. Among other things, these regulations impose minimum capital adequacy ratios, minimum required provisioning levels applicable to credit card receivables and stringent lending ratios. The FSC and FSS also impose rules governing the evaluation and reporting of credit card balances, procedures governing which persons may receive credit cards as well as processing fees paid by merchants.

Pursuant to the FSS’s capital adequacy guidelines, which are derived from standards established by the Bank for International Settlements, credit card companies in Korea are required to maintain a total capital adequacy ratio of at least 8.0% on a consolidated basis. To the extent a credit card company fails to maintain such ratio, Korean regulatory authorities may impose penalties on such company ranging from a warning to a suspension or revocation of its license. BC Card’s capital adequacy ratios were 35.8% as of December 31, 2021, 27.3% as of December 31, 2022 and 25.4% as of December 31, 2023. Such capital adequacy ratio will decrease if the growth in BC Card’s asset base is not matched by corresponding growth in its regulatory capital. In addition, BC Card’s capital base and its capital adequacy ratio may decrease if its results of operations or financial condition deteriorates. Accordingly, there can be no assurance that BC Card will not be required to obtain additional capital in the future in order to maintain its capital adequacy ratio above the minimum required levels. There can be no assurance that, if BC Card requires additional capital in the future, it will be able to obtain such capital on favorable terms or at all, which could have a material adverse effect on the business, financial condition and results of operations of BC Card.

The Government may adopt further regulatory changes in the future that affect the credit card industry. Depending on their nature, such changes may adversely affect the operations of BC Card, by restricting its growth or scope, subjecting it to stricter requirements and potential sanctions or greater competition, constraining its profitability or otherwise.

Disputes with our labor union may disrupt our business operations.

In the past, we have experienced opposition from our labor union for our strategy of restructuring to improve our efficiency and profitability by disposing of non-core businesses and reducing our employee base. Although we have not experienced any significant labor disputes or unrests in recent years, there can be no assurance that we will not experience labor disputes or unrests in the future, including extended protests and strikes, which could disrupt our business operations and have an adverse effect on our financial condition and results of operations.

We also negotiate collective bargaining agreements every two years with our labor union and annually negotiate a wage agreement. Our current collective bargaining agreement expires on October 9, 2025. Although we have been able to reach collective bargaining agreements and wage agreements with our labor union in recent years, there can be no assurance that we will not experience labor disputes and unrest resulting from disagreements with the labor union in the future.

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We are subject to various laws and regulations in Korea and other jurisdictions, including the Monopoly Regulation and Fair Trade Act of Korea.

Our business operations and acts of our management, employees and other relevant parties are subject to various laws and regulations in and outside Korea. These laws are complicated and sometimes conflicting and our efforts to comply with these laws could increase our cost of doing business, restrict our business activities and expose us or our employees to legal sanctions and liabilities.

The Monopoly Regulation and Fair Trade Act provides for various regulations and restrictions on large business groups enforced by the Korea Fair Trade Commission to prohibit or restrict actions that impede competition and fair trade. The Korea Fair Trade Commission designated us as a large business group under the Monopoly Regulation and Fair Trade Act on April 1, 2002. Our business relationships and transactions with our subsidiaries, affiliates and other companies within the KT group are subject to ongoing scrutiny by the Korea Fair Trade Commission as to, among other things, whether such relationships and transactions constitute undue financial support among companies of the same business group. We are also subject to the fair trade regulations limiting debt guarantees for other domestic member companies of the same group and cross-shareholdings among domestic member companies of the same group, as well as requiring disclosure of the status of such cross-shareholdings. Additionally, we are subject to a prohibition, in effect since July 2014, against circular shareholding among any three or more entities within our business group. Any future determination by the Korea Fair Trade Commission that we have engaged in transactions that violate the fair trade laws and regulations may result in fines or other punitive measures and may have a material adverse effect on our reputation and our business.

Concerns that radio frequency emissions may be linked to various health concerns could adversely affect our business and we could be subject to litigation relating to these health concerns.

In the past, allegations that serious health risks may result from the use of wireless telecommunications devices or other transmission equipment have adversely affected the share prices of some wireless telecommunications companies in the United States. In May 2011, the International Agency for Research on Cancer (“IARC”) announced that it has classified radiofrequency electromagnetic fields associated with wireless phone use as possibly carcinogenic to humans, based on an increased risk for glioma, a malignant type of brain cancer. The IARC is part of the World Health Organization that conducts research on the causes of human cancer and the mechanisms of carcinogenesis, and aims to develop scientific strategies for cancer control. We cannot assure you that such health concerns will not adversely affect our business. Several class action and personal injury lawsuits have been filed in the United States against several wireless phone manufacturers and carriers, asserting product liability, breach of warranty and other claims relating to radio transmissions to and from wireless phones. We could be subject to liability or incur significant costs defending lawsuits brought by our subscribers or other parties who claim to have been harmed by or as a result of our services. In addition, the actual or perceived risk of wireless telecommunications devices could have an adverse effect on us by reducing our number of subscribers or our usage per subscriber.

Depreciation of the value of the Won against the Dollar and other major foreign currencies may have a material adverse effect on the results of our operations and on the prices of our securities.

Substantially all of our revenues are denominated in Won. Depreciation of the Won may materially affect the results of our operations because, among other things, it causes an increase in the amount of Won required by us to make interest and principal payments on our foreign-currency-

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denominated debt, the costs of telecommunications equipment that we purchase from overseas sources, net settlement payments to foreign carriers and certain payments related to our derivative instruments entered into for foreign exchange risk hedging purposes. Of the ￦10,218 billion total borrowings (including short-term borrowings) outstanding as of December 31, 2023, ￦2,801 billion was denominated in foreign currencies. Upon identification and evaluation of our currency risk exposures, we, having considered various circumstances, enter into derivative financial instruments to try to mitigate such risks. Although the impact of exchange rate fluctuations has in the past been partially mitigated by such strategies, our results of operations have historically been affected by exchange rate fluctuations, and there can be no assurance that such strategies will be sufficient to reduce or eliminate the adverse impact of such fluctuations in the future. See “—Item 3.A. Selected Financial Data—Exchange Rate Information”, “Item 5. Operating and Financial Review and Prospects—Item 5.B. Liquidity and Capital Resources” and “Item 11. Quantitative and Qualitative Disclosures About Market Risk—Exchange Rate Risk.”

Fluctuations in the exchange rate between the Won and the Dollar will also affect the Dollar equivalent of the Won price of our ordinary shares on the KRX Korea Composite Stock Price Index (“KOSPI”) Market and, as a result, will likely affect the market price of the ADSs. These fluctuations will also affect the Dollar conversion by the depositary for the American Depositary Receipts (“ADRs”) of cash dividends, if any, paid in Won on our ordinary shares represented by the ADSs.

We may be exposed to potential claims for unpaid wages and become subject to additional labor costs arising from the Supreme Court of Korea’s interpretation of ordinary wages.

Under the Labor Standards Act, an employee’s “ordinary wage” is a key legal construct used to calculate many statutory benefits and entitlements in Korea. Increasing or decreasing the amount of compensation included in employees’ ordinary wages has the effect of increasing or decreasing the amounts of various statutory entitlements that are calculated based on “ordinary wage,” such as overtime premium pay. Under guidelines previously issued by the Ministry of Employment and Labor, prior to the Supreme Court decision described below, an employee’s ordinary wage included base salary and certain fixed monthly allowances for work performed overtime during night shifts and holidays. Prior to the Supreme Court of Korea’s decision described below, companies in Korea had typically interpreted these guidelines as excluding from the scope of ordinary wages fixed bonuses that are paid other than on a monthly basis, namely on a bi-monthly, quarterly or biannual basis.

In December 2013, the Supreme Court of Korea ruled that regular bonuses (including those that are paid other than on a monthly basis) shall be deemed ordinary wages if these bonuses are paid “regularly” and “uniformly” on a “fixed basis” notwithstanding differential amounts based on seniority. Under this decision, any collective bargaining agreement or labor-management agreement which attempts to exclude such regular bonuses from employees’ ordinary wages will be deemed void for violation of the mandatory provisions of Korean law. However, the Supreme Court of Korea further ruled that, in certain limited situations, an employee’s claim of underpayment under the expanded scope of ordinary wages for the past three years may be denied based on the principles of good faith, even if the claim is raised within the statute of limitations period. Following this Supreme Court decision, the Ministry of Employment and Labor issued a Guideline for Labor and Management on Ordinary Wages in January 2014.

While we currently are not subject to any claims of underpayment from our current or former employees, the Supreme Court decision may result in additional labor costs for us in the form of additional payments required under the expanded scope of ordinary wages. Any such additional payments may have an adverse effect on our financial condition and results of operations.

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Risks Relating to Korea

If economic conditions in Korea deteriorate, our current business and future growth could be materially and adversely affected.

We are incorporated in Korea, and we generate most of our operating revenue in Korea. As a result, we are subject to economic, political, legal and regulatory risks specific to Korea, and our performance and successful execution of our operational strategies are dependent on the overall Korean economy. The economic indicators in Korea in recent years have shown mixed signs of deterioration and recovery, and future growth of the Korean economy is subject to many factors beyond our control, including developments in the global economy.

Following a period of deterioration due to the debilitating effects of the COVID-19 pandemic on the Korean economy as well as on the economies of Korea’s major trading partners in 2020, the overall Korean economy showed some signs of recovery in 2021. See “— COVID-19 and any possible occurrences of other types of widespread infectious diseases could materially and adversely affect our business, financial condition or results of operations.” However, adverse conditions and volatility in the worldwide financial markets, fluctuations in oil and commodity prices, supply chain disruptions and the increasing weakness of the global economy, in particular due to the COVID-19 pandemic, and beginning in the second half of 2021, rapid increases in interest rates globally to combat inflation, have contributed to the uncertainty of global economic prospects in general and have adversely affected, and may continue to adversely affect, the Korean economy. The value of the Won relative to major foreign currencies has fluctuated significantly and, as a result of uncertain global and Korean economic conditions, there has been significant volatility in the stock prices of Korean companies recently. Future declines in the KOSPI, and large amounts of sales of Korean securities by foreign investors and subsequent repatriation of the proceeds of such sales may adversely affect the value of the Won, the foreign currency reserves held by financial institutions in Korea, and the ability of Korean companies to raise capital. Any future deterioration of the Korean economy could adversely affect our business, financial condition and results of operations and the market price of our ADSs.

Other developments that could have an adverse impact on Korea’s economy include:

• declines in consumer confidence and a slowdown in consumer spending, including as a result of severe health epidemics;

• hostilities or, political or social tensions involving Russia (including the invasion of Ukraine by Russia and ensuing actions that the United States and other countries have taken and may take in the future) and any resulting adverse effects on the global supply of oil and other natural resources or the global financial markets;

• adverse conditions or developments in the economies of countries and regions that are important export markets for Korea, such as China, the United States, Europe and Japan, or in emerging market economies in Asia or elsewhere, including as a result of the deteriorating economic and trade relations between the United States and China and increased uncertainties in the global financial markets and industry;

• adverse changes or volatility in foreign currency reserve levels, inflation rates, interest rates, commodity prices (including oil prices), exchange rates (including fluctuation of the U.S. dollar, the Euro or the Japanese Yen exchange rates or revaluation of the Chinese Yuan) or stock markets;

• the occurrence of severe health epidemics in Korea or other parts of the world, in addition to the COVID-19 pandemic;

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• deterioration in economic or diplomatic relations between Korea and its trading partners or allies, including deterioration resulting from territorial or trade disputes or disagreements in foreign policy;

• increased sovereign default risk in select countries and the resulting adverse effects on the global financial markets;

• deterioration in the financial condition or performance of small- and medium-sized enterprises and other companies in Korea due to the Government’s policies to increase minimum wages and limit working hours of employees;

• investigations of large Korean business groups and their senior management for possible misconduct;

• continuing rise in the level of household debt and increasing delinquencies and credit defaults by retail and small- and medium-sized enterprise borrowers in Korea;

• shortages of imported raw materials, natural resources, rare earth minerals or component parts due to disruptions to the global supply chain;

• the economic impact of any pending or future free trade agreements or of any changes to existing free trade agreements;

• social and labor unrest;

• substantial changes in the market prices of Korean real estate;

• a substantial decrease in tax revenues and a substantial increase in the Government’s expenditures for fiscal stimulus measures, unemployment compensation and other economic and social programs, in particular in light of the Government’s ongoing efforts to provide emergency relief payments to households and emergency loans to corporations in need of funding in light of COVID-19 as well as interest rate increases, which, together, would likely lead to a national budget deficit as well as an increase in the Government’s debt;

• financial problems or lack of progress in the restructuring of Korean business groups, other large, troubled companies, their suppliers or the financial sector;

• loss of investor confidence arising from corporate accounting irregularities or corporate governance issues concerning certain Korean companies;

• increases in social expenditures to support an aging population in Korea or decreases in economic productivity due to the declining population size in Korea;

• geopolitical uncertainty and the risk of further attacks by terrorist groups around the world;

• political uncertainty or increasing strife among or within political parties in Korea;

• hostilities or political or social tensions involving oil-producing countries in the Middle East (including the escalation of hostilities in the Middle East following the Israel-Hamas war) and Northern Africa and any material disruption in the global supply of oil or sudden increase in the price of oil;

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• natural or man-made disasters that have a significant adverse economic or other impact on Korea or its major trading partners; and

• an increase in the level of tensions or an outbreak of hostilities between North Korea and Korea or the United States.

Escalations in tensions with North Korea could have an adverse effect on us and the market value of our ADSs.

Relations between Korea and North Korea have been tense throughout Korea’s modern history. The level of tension between the two Koreas has fluctuated and may increase abruptly as a result of current and future events. In particular, there have been heightened security concerns in recent years stemming from North Korea’s nuclear weapon, ballistic missile and satellite programs as well as its hostile military actions against Korea. Some of the significant incidents in recent years include the following:

• North Korea renounced its obligations under the Nuclear Non-Proliferation Treaty in January 2003 and has conducted six rounds of nuclear tests since October 2006, including claimed detonations of hydrogen bombs, and warheads that can be mounted on ballistic missiles. Over the years, North Korea has also conducted a series of ballistic missile tests, including missiles launched from submarines and intercontinental ballistic missiles that it claims can reach the United States mainland. North Korea has increased the frequency of such activities since the beginning of 2022, firing numerous ballistic missiles, including intercontinental ballistic missiles, and in November 2023, successfully launched its first spy satellite. In response, the Korean government has repeatedly condemned the provocations and flagrant violations of relevant United Nations Security Council resolutions. In February 2016, the Korean government also closed the inter-Korea Gaeseong Industrial Complex in response to North Korea’s fourth nuclear test in January 2016. Internationally, the United Nations Security Council has passed a series of resolutions condemning North Korea’s actions and significantly expanding the scope of sanctions applicable to North Korea. Over the years, the United States and the European Union have also expanded their sanctions applicable to North Korea.

• In March 2010, a Korean naval vessel was destroyed by an underwater explosion, killing many of the crewmen on board. The Korean government formally accused North Korea of causing the sinking, while North Korea denied responsibility. Moreover, in November 2010, North Korea fired more than 100 artillery shells that hit Korea’s Yeonpyeong Island near the Northern Limit Line, which acts as the de facto maritime boundary between Korea and North Korea on the west coast of the Korean peninsula, causing casualties and significant property damage. The Korean government condemned North Korea for the attack and vowed stern retaliation should there be further provocation.

North Korea’s economy also faces severe challenges, which may further aggravate social and political pressures within North Korea. Although bilateral summit meetings between Korea and North Korea were held in April, May and September 2018 and between North Korea and the United States in June 2018, February 2019 and June 2019, there can be no assurance that the level of tensions affecting the Korean peninsula will not escalate in the future. Any further increase in tensions, which may occur, for example, if North Korea experiences a leadership crisis, high-level contacts between Korea and North Korea or between the United States and North Korea break down or military hostilities occur, could have a material adverse effect on the Korean economy and on our business, financial condition and results of operations and the market value of our ADSs.

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Korea’s legislation allowing class action suits related to securities transactions may expose us to additional litigation risk.

The Securities-related Class Action Act of Korea enacted in January 2004 allows class action suits to be brought by shareholders of companies (including us) listed on the KRX KOSPI Market for losses incurred in connection with purchases and sales of securities and other securities transactions arising from (1) false or inaccurate statements provided in the registration statements, prospectuses, business reports, audit reports, semi-annual or quarterly reports and material fact reports and omission of material information in such documents, (2) insider trading, (3) market manipulation and (4) unfair trading. This law permits 50 or more shareholders who collectively hold 0.01% of the shares of a company to bring a class action suit against, among others, the issuer and its directors and officers. Because of the enactment of the act, there is not enough judicial precedent to predict how the courts will apply the law. Litigation can be time-consuming and expensive to resolve, and can divert management time and attention from business operation. We are not aware of any basis upon which such suit may be brought against us, nor are any such suits pending or threatened. Any such litigation brought against us could have a material adverse effect on our business, financial condition and results of operations.

We are generally subject to Korean corporate governance and disclosure standards, which differ in significant respects from those in other countries.

Companies in Korea, including us, are subject to corporate governance standards applicable to Korean public companies which differ in some respects from standards applicable in other countries, including the United States. As a reporting company registered with the Securities and Exchange Commission and listed on the New York Stock Exchange, we are, and will continue to be, subject to certain corporate governance standards. However, foreign private issuers, including us, are exempt from certain corporate governance standards required under the New York Stock Exchange. For a description of significant differences in corporate governance practice compared to corporate governance standards of the New York Stock Exchange applicable to U.S. issuers, see “Item 16G. Corporate Governance.” There may also be less publicly available information about Korean companies, such as us, than is regularly made available by public or non-public companies in other countries.

Risks Relating to the Securities

If an investor surrenders his American Depositary Shares (“ADSs”) to withdraw the underlying shares, he may not be allowed to deposit the shares again to obtain ADSs. 

Korean law currently limits foreign ownership of the ADSs and our shares. In addition, under our deposit agreement, the depositary bank cannot accept deposits of shares and deliver ADSs representing those shares unless (1) we have consented to such deposit or (2) Korean counsel has advised the depositary bank that the consent required under (1) is no longer required under Korean laws and regulations. Under current Korean laws and regulations, the depositary bank is required to obtain our prior consent for the number of shares to be deposited in any given proposed deposit which exceeds the difference between (1) the aggregate number of shares deposited by us or with our consent for the issuance of ADSs (including deposits in connection with the initial and all subsequent offerings of ADSs and stock dividends or other distributions related to these ADSs) and (2) the number of shares on deposit with the depositary bank at the time of such proposed deposit. The depositary bank has informed us that, at a time it considers to be appropriate, the depositary bank plans to start accepting deposits of shares without our consent and to deliver ADSs representing those shares up to the amount allowed under current Korean laws and regulations. Until such time, however, the depositary bank will continue to obtain our consent for such deposits of shares and delivery of ADSs,

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which we may not provide. Consequently, if an investor surrenders his ADSs to withdraw the underlying shares, he may not be allowed to deposit the shares again to obtain ADSs. See “Item 10. Additional Information—Item 10.D. Exchange Controls.”

A foreign investor may not be able to exercise voting rights with respect to common shares exceeding certain restrictions.

Under the Telecommunications Business Act, a foreign shareholder who holds 5.0% or more of our total shares is prohibited from becoming our largest shareholder. However, any foreign shareholder who held 5.0% or more of our total shares and was our largest shareholder on or prior to May 9, 2004 is exempt from the regulations, provided that such foreign shareholder may not acquire any more of our shares. In addition, under the Telecommunications Business Act, the MSIT may, if it deems it necessary to preserve substantial public interests, prohibit a foreign shareholder from being our largest shareholder. In the event that any foreigner or foreign government acquires our shares in violation of the above provisions, such foreign shareholder may not be able to exercise voting rights with respect to common shares exceeding such threshold. The MSIT may also order us or the foreign shareholder to take corrective measures in respect of the excess shares within a specified period of six months or less.

In addition, the Telecommunications Business Act restricts the ownership and control of network service providers by foreign shareholders. Foreigners (based on citizenship), foreign governments and “companies deemed as foreigners” may not own more than 49.0% of the issued shares with voting rights of a network service provider, including us. For purposes of the Telecommunications Business Act, the term “company deemed as a foreigner” means a company in which a foreigner or a foreign government is the largest shareholder and holds 15.0% or more of the company’s shares with voting rights, provided, however, that such company will not be counted as a foreign shareholder for the purposes of the 49.0% limit if (1) it holds less than 1.0% of our total issued and outstanding shares with voting rights or (2) if the MSIT determines that the fact that such foreign government or entity holds a 15.0% or greater shareholding in such company does not present a risk of harm to the public interest. 

Notwithstanding the above, pursuant to an amendment to the Telecommunications Business Act that became effective in April 2022, a company, so long as (i) its largest shareholder (determined by aggregating the shareholdings of such shareholder and its related parties) is a foreign government or a foreigner of a country that has entered into a bilateral or multilateral free trade agreement with Korea (an “FTA Country”) that is designated by the MSIT, and (ii) such shareholder (together with the shareholdings of its related parties) owns 15.0% or more of the issued voting stock of such entity, may own more than 49.0% of our issued shares with voting rights but may not exercise its voting rights with respect to the shares held in excess of the 49.0% ceiling until the conclusion of the MSIT’s public interest review. Furthermore, pursuant to an amendment to the Telecommunications Business Act that became effective in December 2022, this exemption from the restriction of foreign ownership of a network service provider beyond the 49.0% threshold applies not only to a foreign government or a foreigner from an FTA Country but also to a foreign government or a foreigner from an OECD country.

As of December 31, 2023, 43.2% of our common shares were owned by foreign investors. In the event that any foreigner or foreign government acquires our shares in violation of the above provisions, such foreign shareholder may not be able to exercise voting rights with respect to common shares exceeding such threshold. The MSIT may also order us or the foreign shareholder to take corrective measures in respect of the excess shares within a specified period of six months or less. See “Item 4. Information of the Company—Item 4.B. Business Overview—Regulation—Foreign Investment” and “Item 10. Additional Information—Item 10.B. Memorandum and Articles of Association—Limitations on Shareholding.”

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Holders of ADSs will not be able to exercise appraisal rights unless they have withdrawn the underlying ordinary shares and become our direct shareholders.

In some limited circumstances, including the transfer of the whole or any significant part of our business and our merger or consolidation with another company, dissenting shareholders have the right to require us to purchase their shares under Korean law. A holder of ADSs will not be able to exercise appraisal rights unless he has withdrawn the underlying ordinary shares and become our direct shareholder. See “Item 10. Additional Information—Item 10.B. Memorandum and Articles of Association.”

An investor may not be able to exercise preemptive rights for additional shares and may suffer dilution of his equity interest in us.

The Commercial Code of Korea and our articles of incorporation require us, with some exceptions, to offer shareholders the right to subscribe for new shares in proportion to their existing ownership percentage whenever new shares are issued. If we offer any rights to subscribe for additional ordinary shares or any rights of any other nature, the depositary bank, after consultation with us, may make the rights available to an ADS holder or use reasonable efforts to dispose of the rights on behalf of the ADS holder and make the net proceeds available to the ADS holder. The depositary bank, however, is not required to make available to an ADS holder any rights to purchase any additional shares unless it deems that doing so is lawful and feasible and:

• a registration statement filed by us under the Securities Act of 1933, as amended, is in effect with respect to those shares; or

• the offering and sale of those shares is exempt from or is not subject to the registration requirements of the Securities Act.

We are under no obligation to file any registration statement. If a registration statement is required for an ADS holder to exercise preemptive rights but is not filed by us, the ADS holder will not be able to exercise his preemptive rights for additional shares. As a result, the ADS holder may suffer dilution of his equity interest in us.

Forward-looking statements may prove to be inaccurate.

This annual report contains “forward-looking statements” that are based on our current expectations, assumptions, estimates and projections about us and the industries in which we operate. The forward-looking statements are subject to various risks and uncertainties. These forward-looking statements include, but are not limited to, those statements using words such as “anticipate,” “believe,” “continues,” “expect,” “estimate,” “intend,” “project,” “aim,” “plan,” “likely to,” “target,” “contemplate,” “predict,” “potential” and similar expressions and future or conditional verbs such as “will,” “would,” “should,” “could,” “might,” “can,” “may,” or similar expressions generally intended to identify forward- looking statements. Those statements include, among other things, the discussions of our business strategy and expectations concerning our market position, future operations, margins, profitability, liquidity and capital resources. We caution you that reliance on any forward-looking statement involves risks and uncertainties, and that although we believe that the assumptions on which our forward-looking statements are based are reasonable, any of those assumptions could prove to be inaccurate, and, as a result, the forward-looking statements based on those assumptions could be incorrect. The uncertainties in this regard include, but are not limited to, those identified in the risk factors discussed above. In light of these and other uncertainties, you should not conclude that we will necessarily achieve any plans and objectives or projected financial results referred to in any of the forward-looking statements. We do not undertake to release the results of any revisions of these forward-looking statements to reflect future events or circumstances.

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Item 4.  Information on the Company

Item 4.A.  History and Development of the Company

In 1981, the Government established us under the Korea Telecom Act to operate the telecommunications services business that it previously directly operated. Under the Korea Telecom Act and the Government-Invested Enterprises Management Basic Act, the Government exercised substantial control over our business and affairs. Effective October 1, 1997, the Korea Telecom Act was repealed and the Government-Invested Enterprises Management Basic Act became inapplicable to us. As a result, we became a corporation under the Commercial Code, and our corporate organization and shareholders’ rights were governed by the Government’s privatization laws and the Commercial Code. Among other things, we began to exercise greater autonomy in setting our annual budget and making investments in the telecommunications industry, and our shareholders began electing our directors, who had previously been appointed by the Government under the Korea Telecom Act.

Prior to 1993, the Government owned all of the issued shares of our common stock. From 1993 through May 2002, the Government disposed of all of its equity interest in us, and the privatization laws ceased to apply to us in August 2002. We amended our legal name from Korea Telecom Corp. to KT Corporation in March 2002.

Before December 1991, we were the sole provider of local, domestic long-distance and international long-distance telephone services in Korea. The Government began to introduce competition in the telecommunications services market in the early 1990’s. As a result, including ourselves, there are currently three local telephone service providers, five domestic long-distance carriers and numerous international long-distance carriers (including voice resellers) in Korea. In addition, the Government awarded licenses to several service providers to promote competition in other telecommunications business areas such as mobile telephone services and data network services. In June 2009, KT Freetel Co., Ltd. (“KTF”), a subsidiary providing mobile telephone services, merged into KT Corporation, with KT Corporation surviving the merger, with the objective of maximizing management efficiencies of our fixed-line and mobile telecommunications operations as well as more effectively responding to the convergence trends in the telecommunications industry. There are currently three mobile telephone service providers in Korea. See “—Item 4.B. Business Overview—Competition.”

We are a corporation with limited liability organized under the laws of Korea, and our legal and commercial name is KT Corporation. Our principal executive offices are located at KT Gwanghwamun Building East, 33, Jong-ro 3-gil, Jongno-gu, 03155, Seoul, Korea, our telephone number is +82-2-3495-3557 and the address of our English website is https://corp.kt.com/eng/.

The SEC maintains a website (http://www.sec.gov), which contains reports, information statements and other information regarding issuers that file electronically with the SEC.

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Item 4.B.  Business Overview

We are the leading integrated telecommunications and platform service provider in Korea and one of the most advanced in Asia. We plan to transform ourselves into an artificia intelligence (“AI”) driven information and communication technology (“ICT”) company that integrates AI and information technology into our existing communication technology business and expands into new businesses that utilize AI. In addition, we will continue to pursue innovation in our other major business areas, including media and content services, Internet data centers and cloud services, real estate operations and financial services.

Our principal services include:

• mobile voice and data telecommunications services based on 5G, 4G LTE and 3G W-CDMA technology;

• fixed-line services, which include:

Ø (i) fixed-line telephone services, including local, domestic long-distance and international long-distance services, (ii) Voice over Internet Protocol (“VoIP”) telephone services (i.e., provision of communication services over the Internet, and not over the fixed-line PSTN) and (iii) interconnection services to other telecommunications companies;

Ø broadband Internet access services; and

Ø data communication services, including fixed-line and satellite leased line services and dedicated broadband Internet connection service to corporate and other institutional customers;

• media and content services, including IPTV, satellite TV, digital music services, e-commerce services, online advertising consulting services and web comics and novels services;

• financial services, including credit card processing and other financial services offered primarily through BC Card;

• other business activities, including information technology and network services and rental of real estate by KT Estate Inc. (“KT Estate”); and

• sale of goods, primarily sale of handsets related to our mobile services and miscellaneous telecommunications equipment, as well as sale of residential units and commercial real estate developed by KT Estate.

Leveraging our dominant position in the fixed-line telephone services market and our established customer base in Korea, we have successfully pursued new growth opportunities and obtained strong market positions in each of our principal lines of business. In particular:

• in mobile services, we achieved a market share of 29.7% with approximately 24.9 million subscribers as of December 31, 2023;

• in fixed-line and VoIP telephone services, we had approximately 12.0 million subscribers, consisting of 8.8 million PSTN subscribers and 3.2 million VoIP subscribers as of December 31, 2023. As of such date, our market share of the fixed-line local telephone and VoIP services was 62.3%; and

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• we are Korea’s largest broadband Internet access provider with approximately 9.8 million subscribers as of December 31, 2023, representing a market share of 40.8%.

For the year ended December 31, 2023, our operating revenue was ￦26,595 billion, our profit for the year was ￦972 billion and our basic earnings per share was ￦3,982. As of December 31, 2023, our total assets were ￦42,792 billion, total liabilities were ￦24,249 billion and total equity was ￦18,543 billion.

Our Services

The following table sets out our operating revenue by principal product categories and the respective percentage of total operating revenue in 2021, 2022 and 2023.

	For the Year Ended December 31,
	2021					2022					2023
Products and services	Billions of Won		%			Billions of Won		%			Billions of Won		%
Mobile services	￦	6,936		27.5	%	￦	7,014		26.7	%	￦	7,140		26.8	%
Fixed-line services:
Fixed-line and VoIP telephone services		1,465		5.8			1,378		5.3			1,249		4.7
Broadband Internet access services		2,344		9.3			2,505		9.5			2,579		9.7
Data communication services		1,152		4.6			1,173		4.5			1,315		4.9
Subtotal		4,960		19.7			5,057		19.3			5,142		19.3
Media and content services		2,801		11.1			3,100		11.8			3,207		12.1
Financial services		3,662		14.5			3,837		14.6			3,968		14.9
Others		3,313		13.1			3,834		14.6			3,846		14.5
Sale of goods (1)		3,533		14.0			3,394		12.9			3,293		12.4
Total operating revenue	￦	25,206		100.0	%	￦	26,234		100.0	%	￦	26,595		100.0	%

(1) Primarily related to sale of handsets for our mobile service and miscellaneous telecommunications equipment, as well as sale of residential units and commercial real estate developed by KT Estate.

Mobile Services

We provide mobile services based on 5G, 4G LTE and 3G W-CDMA technology. We have made extensive efforts to continually develop advanced technologies as well as to provide a variety of new mobile services with enhanced speed, latency and connectivity. We commercially launched our next generation 5G mobile services in April 2019. We believe that the faster data transmission speed and lower latency of the 5G network enables us to offer significantly enhanced wireless data transmission with faster access to multimedia contents. We began offering 4G LTE services in the Seoul metropolitan area in January 2012, and we completed the expansion of our coverage nationwide in October 2012. 4G LTE technology enables data to be transmitted faster than 3G W-CDMA technology.

Revenue related to mobile service accounted for 26.8% of our operating revenue in 2023. The following table shows selected information concerning the usage of our network during the periods indicated and the number of our mobile subscribers as of the end of such periods:

	As of or for the Year Ended December 31,
	2021		2022		2023
Average monthly revenue per subscriber (1)	￦	31,555	￦	32,803	￦	33,965
Number of mobile subscribers (in thousands)		22,799		24,062		24,897
LTE subscribers		14,637		14,261		13,993
5G subscribers		6,378		8,483		9,918
W-CDMA subscribers		1,784		1,318		986

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(1) The average monthly revenue per subscriber is computed by dividing total monthly fees, usage charges and value-added service fees for the period by the weighted average number of subscribers (other than MVNO subscribers and subscribers of miscellaneous Internet-of-things (“IoT”) services) and dividing the quotient by the number of months in the period.

We compete with SK Telecom, a mobile service provider that has a longer operating history than us, and LG U+ which began its service at around the same time as KTF. As of December 31, 2023, we had approximately 24.9 million subscribers, or a market share of 29.7%.

We market our mobile services primarily through independent exclusive dealers located throughout Korea. In addition to assisting new subscribers to activate mobile service and purchase handsets, authorized dealers are connected to our database and are able to assist customers with their account. Although most of these dealers sell exclusively our products and services, sub-dealers hired by exclusive dealers may sell products and services offered by other mobile telecommunications service providers. Authorized dealers are entitled to a commission for each new subscriber registered, as well as ongoing commissions for the first five years based primarily on the subscriber’s monthly fee, usage charges and length of subscription.

In response to the diversification of our customers’ demands and their increasing sophistication, we have also selectively engaged in opportunities to expand our internal sales channels. We operate customer plazas in key areas that engage in mobile service sales activities as well as provide a one-stop shop for a wide range of other services and products that we offer. We also operate a website to promote and advertise our products and services to the general public and in particular to younger customers who are more familiar with the Internet.

We conduct the screening process for new subscribers with great caution. A potential subscriber must meet all minimum credit criteria before receiving mobile service. The procedure includes checking the history of non-payment and credit information from banks and credit agencies such as the National Information and Credit Evaluation Corporation. Applicants who do not meet the minimum criteria can only subscribe to the mobile service by using a pre-paid card.

Fixed-line Services

We provide a variety of fixed-line services, including various telephone services, broadband Internet access and data communication services.

Fixed-line and VoIP Telephone Services

We utilize our extensive nationwide telephone network to provide fixed-line telephone services, which consist of local, domestic long-distance, international long-distance services and land-to-mobile interconnection services. Our fixed-line telephone network includes exchanges, long-distance transmission equipment and fiber optic and copper cables. We also provide VoIP telephone services that enable VoIP phone devices with broadband connection to make domestic and international calls. These fixed-line and VoIP telephone services accounted for 4.7% of our operating revenue in 2023. In recent years, the proliferation of mobile phones, as well as the availability of increasingly lower wireless pricing plans, some of which include unlimited voice minutes, has led to significant decreases in our domestic long-distance call minutes and local call pulses.

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The following table shows selected information concerning our fixed-line telephone network and the number of PSTN and VoIP subscribers as of the end of the periods indicated as well as their engagement levels during such periods.

	As of or for the Year Ended December 31,
	2019		2020		2021		2022		2023
Total Korean population (thousands) (1)		51,850		51,829		51,639		51,439		51,325
PSTN and VoIP lines in service (thousands)		14,185		13,582		13,096		12,581		12,035
PSTN lines in service		11,052		10,449		9,905		9,376		8,820
Local lines in service		10,076		9,475		8,937		8,430		7,892
Group lines in service		976		973		968		946		928
VoIP lines in service		3,133		3,133		3,191		3,206		3,215
Fiber optic cable (kilometers)		847,497		867,051		896,076		917,114		937,146
Domestic long-distance call minutes (millions) (2)		744		620		500		395		321
Local call pulses (millions) (2)		804		638		554		463		363

(1) Based on the number of registered residents as published by the Ministry of the Interior and Safety of Korea.

(2) Excluding calls placed from public telephones.

Our domestic long-distance cable network is entirely made up of fiber optic cable and can carry both voice and data transmissions. Compared to conventional materials such as coaxial cable, fiber optic cable provides significantly greater transmission capacity with less signal fading, thus requiring less frequent amplification. All of our lines are connected to exchanges capable of handling digital signal technology. A principal limitation of the older analog technology is that applications other than voice communications, such as the transmission of text and computer data, require either separate networks or conversion equipment. Digital systems permit a range of voice, text and data applications to be transmitted simultaneously on the same network.

In recent years, the volume of our incoming international calls has significantly exceeded the volume of our outgoing international calls. The agreed settlement rate is applied to the call minutes to determine the applicable net settlement payment. The following table shows the number of minutes of international long-distance calls recorded by us and network service providers utilizing our international long-distance network in each specified category for each year in the three-year period ended December 31, 2023:

	Year Ended December 31,
	2021		2022		2023
	(In millions of billed minutes)
Incoming international long-distance calls (1)		242.4		422.2		615.8
Outgoing international long-distance calls		44.4		36.1		31.5
Total		286.8		458.3		647.3

(1) Starting in 2021, includes incoming traffic of application-to-person correspondence.

Under the Telecommunications Business Act, we are required to permit other service providers to interconnect to our fixed-line network. Currently, the principal users of this interconnection capacity include affiliates of SK Telecom and LG U+ (offering local, domestic long-distance and international long-distance services, and transmitting calls to and from their mobile networks). We recognize as land-to-mobile interconnection revenue the entire amount of the usage charge collected from the landline user and recognize as an expense the amount of interconnection charge paid to the mobile service provider.

Broadband Internet Access Services

Leveraging our nationwide network of 937,147 kilometers of fiber optic cables as of December 31, 2023, we have achieved a leading market position in the broadband Internet access

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market in Korea. We believe we have a competitive advantage over other broadband Internet access service providers because, unlike our competitors, we can utilize our existing networks nationwide to provide broadband Internet access service. Our principal Internet access services are offered under the “KT Internet” and “KT GiGA Internet” brand names. We also offer WiFi services under the “KT WiFi” brand name, which is designed to integrate fixed-line and wireless services by offering high speed wireless Internet access to laptops and smartphones in hot-spot zones and KT Internet service in fixed-line environments. Our broadband Internet access services accounted for 9.7% of our operating revenue in 2023.

As of December 31, 2023, we had approximately 9.8 million broadband Internet subscribers, including approximately 6.7 million KT GiGA Internet service subscribers with enhanced data transmission speeds. We also sponsored approximately 98 thousand hot-spot zones nationwide for wireless connection as of December 31, 2023.

Our KT Internet services primarily utilize ADSL technology, which is a technology that converts existing copper twisted-pair telephone lines into access paths for multimedia and high-speed data communications. ADSL transforms the existing public telephone network from one limited to voice, text and low-resolution graphics to a system capable of bringing multimedia to subscriber premises without new cabling. The asymmetric design optimizes the bandwidth by maximizing the downstream speed for downloading information from the Internet. We are continually upgrading our broadband network to enable better FTTH connection, which further enhances data transmission speed and connection quality. FTTH is a telecommunication architecture in which a communication path is provided over optical fiber cables extending from the telecommunications operator’s switching equipment to the boundary of home or office. FTTH uses fiber optic cable, which is able to carry a high-bandwidth signal for longer distances without degradation. FTTH enables us to deliver enhanced services that require high bandwidth, such as IPTV, and other digital media contents with higher stability.

Data Communication Services

Our data communication services involve offering exclusive lines that allow point-to-point connection for voice and data traffic between two or more geographically separate points. As of December 31, 2023, we leased 318,281 lines to domestic and international businesses. We provide dedicated and secure broadband Internet connection service to institutional customers under the “Kornet” brand name. We provide high-speed connection to our Internet backbone network, as well as rent to our customers and install necessary routers to ensure reliable Internet connection and enhanced security. We provide discount rates to qualified customers, including small- and medium-sized enterprises, businesses engaging in Internet access services and government agencies. Data communication services accounted for 4.9% of our operating revenue in 2023.

Through our wholly owned subsidiary KT Sat Co., Ltd., we also provide transponder leasing, broadcasting, video distribution and data communication services through satellites periodically launched by us. We also lease satellite capacity from other satellite operators to offer satellite services to both domestic and international customers.

Media and Content Services

We offer a variety of media and content services, including IPTV, satellite TV, e-commerce services, digital music services, online advertising consulting services, web comics and novels services and media content creation and distribution services. Media and content services accounted for 12.1% of our operating revenue in 2023. In addition, in September 2021, KT Skylife, in which we held a 50.3% interest as of December 31, 2023, acquired a 100.00% interest in HCN, which is Korea’s fifth largest cable TV operator. See “Item 5. Operating and Financial Review and Prospects—Item 5.A. Operating Results—Overview—Acquisitions and Disposals of Interests in Subsidiaries and Joint Ventures.”

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IPTV

We offer high definition video-on-demand and real-time broadcasting and ultra-high-definition (“UHD”) IPTV services under the brand name “Genie tv.” Our IPTV service offers access to an array of digital media contents, including broadcast channels, movies, sports, news, educational programs and TV replay, for a fixed monthly fee or on a pay-per-view basis. Through a digital set-top box that we rent to our customers, our customers are able to browse the catalogue of digital media contents and view selected media streams on their television. A set-top box provides two-way communications on an IP network and decodes video streaming data. We had approximately 9.4 million IPTV subscribers as of December 31, 2023.

We are also leveraging our big data analytics capabilities and artificial intelligence technology to further enhance our IPTV services. We offer artificial intelligence-based “GiGA genie” service to our IPTV subscribers through a voice recognition speaker that also serves as the IPTV’s set-top box, which enables us to take advantage of big data analytics and enhance our product offerings as well as operate a more effective automated customer service center.

Satellite TV

We offer satellite TV services with features similar to our IPTV services through KT Skylife. As of December 31, 2023, we had approximately 3.5 million subscribers for our satellite TV services, including Genie tv Skylife combination services.

Digital Music Services

We operate Genie, our platform for music contents as well as subscription-based access to digital music streaming and downloading services, through our subsidiary Genie Music Corporation, in which KT Studio Genie Co., Ltd. (“KT Studio Genie”) held a 36.0% interest as of December 31, 2023. Genie offers a broad selection of Korean and international music, both in streaming and download formats, as well as a variety of features designed to enhance the experience of users. In addition, we provide a variety of original audio contents through Genie, including audio books and novels. We offer Genie services in various formats that are specifically designed for mobile and other connected devices, PCs, TVs and automobiles. Genie Music Corporation also provides online streaming of live music performances through STAYG platform.

E-commerce Services

In July 2021, we merged KTH Co., Ltd. (“KTH”) and KT mhows Co., Ltd. (“KT mhows”) to create KT alpha Co., Ltd. (“KT alpha”) in which we held a 70.5% interest on a consolidated basis as of December 31, 2023. Through such merger, we expect to achieve vertical integration and pursue additional mobile commerce opportunities by leveraging KT mhows’ large corporate customer base with the e-commerce infrastructure and know-how of KTH.

Through KT alpha, we offer TV home shopping and digital content distribution services. Furthermore, we offer a variety of consumer products and food items on our IPTV and satellite TV platforms. We also secure rights to digital entertainment contents such as movies, animations and TV series and distribute such contents to other media platforms. 

We also offer mobile gift card services through KT alpha under the brand name “giftishow” and other mobile advertising solutions to corporate customers.

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Online Advertising Consulting Services

We provide strategic advertising consulting services for the online advertising industry through our subsidiaries Nasmedia, Co., Ltd. (“Nasmedia”), in which we held a 43.1% interest as of December 31, 2023, and PlayD Co., Ltd. (“PlayD”), in which Nasmedia and we in the aggregate held a 70.4% interest as of December 31, 2023. We provide a variety of services for advertising agencies, online media companies and their clients, ranging from market studies to advertising campaign planning as well as analysis of such campaign’s effectiveness. Our proprietary data analysis tools enable us to define specific advertising targets for the clients as well as to evaluate the effectiveness of various marketing channels to provide an optimal advertising campaign strategy.

Web Comics and Novels Services

StoryWiz, which was established in February 2020 and in which KT Studio Genie held a 100.0% interest as of December 31, 2023, specializes in producing and distributing web comics and web novels. StoryWiz operates a platform called Blice for web novels and web comics. Through Blice, numerous writers distribute their web novels and web comics, and we support them in various ways, including holding contests and providing funding for new and promising writers. Blice also offers a diverse selection of genres including comedy, romance, action and fantasy. We strive to further expand our intellectual property to movies and dramas.

Media Content Creation and Distribution Services

We engage in media content creation and distribution services through KT Studio Genie, in which we held a 90.9% interest as of December 31, 2023. KT Studio Genie produces and sells a wide range of media contents, including multi-episode drama series, to traditional media channels and OTT services. KT Studio Genie also serves as a distribution agency of media contents produced by third-parties.

Financial Services

As part of our overall strategy, we selectively pursue new business opportunities in the financial sector that complement our telecommunications business. In October 2011, we acquired a controlling interest in BC Card, a leading credit card solutions provider in Korea in which we held a 69.5% interest as of December 31, 2023. As of such date, BC Card held a 33.7% interest in K Bank, an Internet-only bank that began its commercial operations in April 2017. Revenue from our financial services, which consist primarily of revenue from BC Card, accounted for 14.9% of our operating revenue in 2023.

BC Card

Through BC Card, we offer various credit card processing and related financial services. We operate the largest merchant payment network in Korea as measured by transaction volume. We also provide outsourcing services to a wide range of financial institutions for their credit card and check card business operations, including production and delivery of new credit cards, the preparation of monthly statements, management of merchants and other ancillary services. We also offer our services in select countries in Asia, including China, Indonesia and Vietnam. 

A minority interest in BC Card is owned by various financial institutions in Korea, many of which are member companies that enter into co-branding agreements with us and issue credit cards and check cards under the “BC Card” brand. Our member companies that issue co-branded credit or check cards include Woori Card, NH Card, Industrial Bank of Korea and KB Kookmin Card. We

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engage in joint marketing efforts to promote cards issued pursuant to our co-branding agreements. However, we typically do not assume credit risks related to the inability of cardholders to make payments on their card usage, which are typically assumed by the member companies. We also provide ancillary outsourcing services to various other banks, securities companies and financial institutions that do not issue co-branded cards with us. 

We charge commissions for merchant fees paid by merchants to credit card companies for processing transactions. Merchant fees vary depending on the type of merchant and the total transaction amounts generated by the merchant. In addition to merchant fees, we receive commissions related to nominal interchange fees for international card transactions, as well as service fees from financial institutions that outsource their credit card business operations.

K Bank

K Bank is one of three Internet-only banks in Korea. Internet-only banks generally operate without branches and conduct their operations primarily through electronic means, which enable them to minimize costs and offer customers higher interest rates on deposits as well as lower lending rates. As of December 31, 2023, K Bank had approximately 9.5 million account holders, with total deposits of ￦19.1 trillion and outstanding loans of ￦13.8 trillion. Other shareholders of K Bank include Woori Bank, a leading bank in Korea.

Pursuant to the Act on Special Cases Concerning Internet-Only Banks, starting from January 2019, a company with its ICT assets comprising more than 50% of its total assets (such as us) may obtain up to a 34.0% interest in an Internet-only bank, and is required to obtain approval from the FSC in order to become its largest shareholder.

Other Businesses

We also engage in various business activities that extend beyond telecommunications and financial services, including real estate development. Our other businesses accounted for 14.5% of our operating revenue in 2023.

Information Technology and Network Services

Digital transformation has increased in recent years, and the Government announced “Digital New Deal” initiatives in July 2020 to further accelerate such trend in Korea. Leveraging our (i) data communications networks, (ii) infrastructure operational know-how and (iii) big data analytics capabilities, we believe that we are well-positioned to take advantage of the attractive opportunities in this era of digital transformation. In 2020, we launched a new brand, KT Enterprise, to better position ourselves to attract corporate customers that have digital transformation needs.

We offer a broad array of information technology and network services to our corporate and other institutional customers. Our range of systems integration services includes consulting, designing, building and maintaining systems and communication networks that satisfy the individual needs of our customers in the public and private sectors. We also provide one-stop global ICT services specifically targeting multinational corporations and international agencies, which range from ICT infrastructure design and buildout to operational solutions that address their multinational needs. In addition, we provide consulting services to optimize energy consumption by corporate and other institutional customers, as well as security surveillance services ranging from buildout of monitoring systems to dispatching of security personnel. We also offer a wide range of “KT DX platform” services for our corporate and other institutional customers that provide customized and integrated digital transformation services that address their technical infrastructure, platform and solution needs.

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In September 2021, KT ES Pte. Ltd., a subsidiary in which we held a 57.6% interest as of December 31, 2023, acquired a 100.0% interest in Epsilon Global Communications Pte. Ltd. (“Epsilon”) for US$139 million. Epsilon is a data service provider that provides data connectivity services to corporate customers around the world.

Information Data Center and Cloud Services

We operate Internet data centers located throughout Korea and provide a wide range of computing services to companies that need servers, storage and leased lines. In April 2022, we completed a vertical spin-off of our Internet data centers business and established a wholly-owned subsidiary, kt cloud Co., Ltd., (“kt cloud”) to more effectively promote the growth of our Internet data center and cloud operations. As of December 31, 2023, we held an 86.3% interest in kt cloud. Data centers are facilities used to house, protect and maintain network server computers that store and deliver Internet and other network contents. kt cloud’s data centers are designed to meet international standards, and are equipped with temperature and humidity control systems, regulated and reliable power supplies, mechanical equipment, fire detection and suppression equipment, security monitoring and wide-bandwidth connections to the Internet. kt cloud’s data center businesses include (i) colocation services (provision of infrastructure services necessary for clients’ server operations), (ii) interconnection services (direct private connections of counterparties, including global cloud service providers), (iii) DBO (design, build and operation) services for clients’ data centers and (iv) managed service provider offerings (operation and maintenance of information technology equipment).

kt cloud also provides a wide range of cloud services that are tailored to address specific needs of its customers in public and private sectors. kt cloud’s cloud businesses include (i) customized cloud infrastructure services for government institutions and major enterprises, (ii) CDN (content delivery network) services offering geographically distributed and interconnected servers for enhanced data traffic and content delivery, (iii) private cloud computing services with infrastructure dedicated to a single customer and (iv) marketplace platform services that enable users to access SaaS (software as a solution) services of various partners of kt cloud.

Real Estate Development

We own land and real estate in various locations throughout Korea. Technological developments have enhanced the coverage area of telecommunications facilities, which enable us to better utilize our existing land and other real estate holdings. Through our wholly-owned subsidiary KT Estate, we engage in the planning and development of residential complexes and commercial buildings on our unused sites, as well as in the leasing of buildings we own. Under the “Remark VILL” brand, we also lease units in residential complexes developed by us in urban areas such as Seoul and Busan.

Sale of Goods

We recognize revenue related to sale of goods, primarily handsets sold to subscribers of our mobile services as well as miscellaneous telecommunications equipment sold to vendors and other telecommunications companies and sale of residential units and commercial real estate developed by KT Estate. We purchase handsets primarily from Samsung Electronics and Apple. Sale of goods accounted for 12.4% of our operating revenue in 2023.

Our Rates

We offer various service plans for our mobile, fixed-line and media and content services. For our individual customers, we offer rate plans targeting specific customer segments that aim to address their individual needs. We also offer bundled rate plans that provide discounts for subscribing to a

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combination of our services, as well as family plans that provide discounts for multiple line subscriptions under one household. For many of our services, we provide additional discounts for customers who commit to extended subscription periods. We provide an online tool designed to help our customers select a plan that is customized to their needs. Our service rates are typically charged on a monthly basis and are due at the end of the month. Our customers are also assessed a 10.0% VAT, which is included in the monthly subscription rates that we charge to our customers.

Our rates for business customers are tailored to the specific needs of the business customers.

Mobile Services

We offer a wide range of mobile service plans that vary depending, among others, on mobile technology (5G, LTE or W-CDMA), mobile device (mobile phone, tablet or other WiFi device) and age category, under which we offer plans based on usage volume for voice calling, data transmission and text messaging as well as addition of value-added services. Our premium packages offer unlimited voice calling, data transmission and text messaging as well as additional media content. We also provide plans specially designed for elderly and young subscribers as well as special discounts to subscribers with physical disabilities or on welfare programs. We do not charge an activation fee for our mobile services.

For mobile service plans that offer unlimited data transmission, we typically decelerate data transmission speeds after a subscriber reaches a set data usage threshold. For usage-based data transmission plans, our subscribers are typically charged additional data transmission fees if usage exceeds the applicable quota. However, for many of our plans, we provide our subscribers the ability to carry over unused data transmission quota of the current month to the following month, or borrow quota allocated to the following month if the current monthly quota have been exhausted. We also subsidize the purchase of new handsets by our qualifying subscribers who agree to use our service for a predetermined service period and purchase handsets on an installment basis.

The following table summarizes the terms of our representative 5G and LTE mobile service plans that we currently offer:

Plan	Monthly Rate		Voice Calls		Video Calls		Data Transmission	Additional Features
5G Premium Choice	￦	130,000		Unlimited		300 min.	Unlimited	•    Unlimited data roaming at 3 Mbps •    Handset insurance using reward points •    No service fee for additional smart device •    Free contents (subscribers can choose two services among Movie / Music / Netflix / Disney / YouTube / Tving)
5G Special Choice	￦	110,000		Unlimited		300 min.	Unlimited	•    Unlimited data roaming at 100 kbps •    Handset insurance using reward points •    No service fee for additional smart device •    Free contents (subscribers can choose two services among Movie / Music / Netflix / Disney / YouTube / Tving)

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Plan	Monthly Rate		Voice Calls		Video Calls		Data Transmission	Additional Features
5G Special	￦	100,000		Unlimited		300 min.	Unlimited	•    Unlimited data roaming at 100 kbps •    Handset insurance using reward points •    No service fee for additional smart device
5G Basic Choice	￦	90,000		Unlimited		300 min.	Unlimited	•    Unlimited data roaming at 100 kbps •    Free contents (subscribers can choose two services among Movie / Music / Netflix / Disney / YouTube / Tving)
5G Basic	￦	80,000		Unlimited		300 min.	Unlimited	•    Unlimited data roaming at 100 kbps
5G Simple 110 GB	￦	69,000		Unlimited		300 min.	Unlimited, but decelerate to 5 Mbps after 110 GB
5G Simple 90 GB	￦	67,000		Unlimited		300 min.	Unlimited, but decelerate to 1 Mbps after 90 GB
5G Simple 70 GB		￦65,000		Unlimited		300 min.	Unlimited, but decelerate to 1 Mbps after 70 GB
5G Simple 50 GB		￦63,000		Unlimited		300 min.	Unlimited, but decelerate to 1 Mbps after 50 GB
5G Simple 30 GB		￦61,000		Unlimited		300 min.	Unlimited, but decelerate to 1 Mbps after 30 GB
5G Slim 21 GB		￦58,000		Unlimited		300 min.	Unlimited, but decelerate to 1 Mbps after 21 GB
5G Slim 14 GB		￦55,000		Unlimited		300 min.	Unlimited, but decelerate to 1 Mbps after 14 GB
5G Slim 10 GB		￦50,000		Unlimited		300 min.	Unlimited, but decelerate to 400 kbps after 10 GB
5G Slim 7 GB		￦45,000		Unlimited		300 min.	Unlimited, but decelerate to 400 kbps after 7 GB
5G Slim 4 GB		￦37,000		Unlimited		300 min.	Unlimited, but decelerate to 400 kbps after 4 GB
Data On Premium		￦89,000		Unlimited		300 min.	Unlimited	•  Handset insurance using reward points •  No service fee for additional smart device •  Media package offering music, video, webtoon and movie content.

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Plan	Monthly Rate	Voice Calls	Video Calls	Data Transmission	Additional Features
Data On Video	￦69,000	Unlimited	300 min.	Unlimited, but decelerate to 5 Mbps after 100 GB
Data On Talk Plus	￦49,000	Unlimited	300 min.	Unlimited, but decelerate to 1 Mbps after 5 GB
LTE Basic	￦33,000	Unlimited	50 min.	1.4 GB with an option to transfer data from and into the next month’s usage

In addition to our mobile service plans, we offer value-added services for additional monthly fees that can be added to the subscription such as media packages, mobile TV packages, additional data transmission packages, caller ID, music service packages and ring tone services and usage reporting services. We also offer fixed-rate international roaming plans that provide data roaming services in various countries around the world, which may be scheduled or automatically activated upon access from an overseas location. 

Our mobile services also generate interconnection charges and expenses. For a call initiated by a mobile subscriber of one of our competitors to our mobile subscriber, the competitor collects from its subscriber its normal rate and remits to us a mobile-to-mobile interconnection charge. In addition, for a call initiated by our mobile subscriber to a mobile subscriber of one of our competitors, we collect from our subscriber our normal rate and remit to the competitor a mobile-to-mobile interconnection charge. 

The following table shows the interconnection charges we paid per minute (exclusive of VAT) to our competitors, and the charges received per minute (exclusive of VAT) from mobile operators for mobile to mobile calls:

	Effective Starting
	January 1, 2021		January 1, 2022		January 1, 2023
KT	￦	10.3	￦	9.7	￦	9.2
SK Telecom		10.3		9.7		9.2
LG U+		10.3		9.7		9.2

Fixed-line Services

Fixed-line Telephone Services

Local and Domestic Long-distance. Our standard usage-based fixed-line telephone service plan consists of a base monthly rate of ￦5,720 and usage fees for local and domestic long-distance calls, as well as calls to VoIP phones and mobile phones. We charge ￦42.9 per three-minute increment for local calls, ￦15.95 per ten second increment for domestic long-distance calls, ￦53.9 per three-minute increment for calls to VoIP phones and ￦15.95 per ten second increment for calls to mobile phones. All usage-based fees are subject to discounts during certain low-usage periods of the day and on national holidays. The rates we charge for local calls are required to be reported to the MSIT, which has 15 days to object to such changes. For our subscribers who are initiating fixed-line telephone services, we charge a one-time nonrefundable activation fee of ￦27,500.

We also offer a flat rate fixed-line telephone service plan with a base monthly rate of ￦12,100 (or ￦8,470 for a three year subscription commitment) that includes 50 hours of local and domestic

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long-distance calls and calls to VoIP phones. Calls to mobile phones are not included in the free 50 hours, and we charge ￦14.50 per ten second increment for such calls. For a premium plan with a base monthly fee of ￦16,500 (or ￦11,550 for a three year subscription commitment), calls to KT mobile subscribers are included as part of the free 50 hours.

International Long-distance. For our international long-distance services, fees for out-going calls vary based on the destination country and whether the user has subscribed to an international long-distance services plan, which can be customized based on the type of telecommunication device (mobile or fixed-line), destination countries and other customer preferences. Usage is typically measured in one-second increments. We pay a settlement fee to the relevant foreign carrier for such calls under a bilateral agreement with the foreign carrier. For incoming calls (including calls placed in Korea by customers of the foreign carriers for home country direct-dial services), we receive settlement payments from the relevant foreign carrier at the applicable settlement rate specified under the relevant bilateral agreement.

Land-to-mobile Interconnection. We provide other telecommunications service providers, including mobile operators and other fixed-line operators, interconnection to our fixed-line network. For a call initiated by a landline user to a mobile service subscriber, we collect from the landline user the land-to-mobile usage charge and remit to the mobile service provider a land-to-mobile interconnection charge. We recognize as land-to-mobile interconnection revenue the entire amount of the usage charge collected from the landline user and recognize as expense the amount of interconnection charge paid to the mobile service provider. The MSIT periodically issues orders setting the interconnection charge calculation method applicable to interconnections with mobile service providers. The MSIT determines the land to mobile interconnection charge by calculating the long run incremental cost of mobile service providers, taking into consideration technology development and future expected costs.

The following table shows the interconnection charges we paid per minute (exclusive of VAT) to mobile operators for landline to mobile calls:

	Effective Starting
	January 1, 2021		January 1, 2022		January 1, 2023
SK Telecom	￦	10.3	￦	9.7	￦	9.2
LG U+		10.3		9.7		9.2

Land-to-land and Mobile-to-land Interconnection. For a call initiated by a landline subscriber of our competitor to our fixed-line user, the landline service provider collects from its subscriber its normal rate and remits to us a land-to-land interconnection charge. In addition, for a call initiated by a mobile service subscriber to our landline user, the mobile service provider collects from its subscriber its normal rate and remits to us a mobile-to-land interconnection charge.

The following table shows such interconnection charge per minute collected for a call depending on the type of call, as determined by the MSIT:

	Effective Starting
	January 1, 2021		January 1, 2022		January 1, 2023
Local access (1)	￦	7.0	￦	6.7	￦	6.3
Single toll access (2)		8.0		7.6		7.2
Double toll access (3)		10.9		10.4		10.1

Source: The MSIT.

(1) Interconnection between local switching center and local access line.

(2) Interconnection involving access to single long-distance switching center.

(3) Interconnection involving access to two long-distance switching centers.

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VoIP Telephone Services

Our VoIP telephone services offer rate plans that charge generally lower base monthly rates and usage-based fees compared to our fixed-line telephone services. For our subscribers who are initiating VoIP telephone services, we charge a one-time nonrefundable activation fee of ￦27,500, which may be waived if the subscriber opts for self-installation.

Broadband Internet Access Services

We offer various broadband Internet access service plans based on data transmission speed and data usage thresholds and offer discounts based on length of commitment that are applied for periods of up to four years. Most of our plans also include WiFi routers that enable our subscribers to create a WiFi environment in their residences. We charge our customers a one-time installation fee per site of ￦27,500. We also charge a modem rental fee ranging from ￦4,400 to ￦22,000 per year that varies depending on the type of model required for the service plan, which is also subject to discounts and waivers based on length of subscription commitment period.

The following table summarizes the terms of our representative broadband Internet access service plans that we currently offer.

Plan	Monthly Rate		Rate with 3 Year Term		Maximum Speed	Max Speed Daily Limit (1)	Additional Features
Internet Super Premium	￦	110,000	￦	88,000	10 Gbps	1000 GB	2 WiFi routers included.
Internet Premium Plus	￦	82,500	￦	60,500	5 Gbps	500 GB	2 WiFi routers included.
Internet Premium	￦	60,500	￦	44,000	2.5 Gbps	250 GB	Discount on 1 WiFi router rental.
Internet Essence	￦	55,000	￦	38,500	1.0 Gbps	150 GB
Internet Slim	￦	39,600	￦	22,000	100 Mbps	None

(1) Data transmission speed is reduced to 100 Mbps if data usage exceeds the specified maximum speed daily limit.

Media and Content Services

Our IPTV and satellite TV service plans vary based on the package of media channels provided, availability of UHD channels and the inclusion of other value-added services. In addition to monthly rates for subscription, we charge a one-time installation fee of ￦27,500 per set-top box and a digital set-top box rental fee ranging from ￦7,700 to ￦22,000 per year that varies depending on the type of set-top box required for the service plan, which is also subject to discounts and waivers based on length of subscription commitment period. We also offer various video-on-demand contents for streaming and downloading for a fee.

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The following table summarizes the terms of our representative IPTV service plans that we currently offer:

Plan	Monthly Rate	Rate for 3 Year Term	Channels (UHD)			Additional Features
Genie tv
NETFLIX Choice UHD	￦42,300	￦35,480		266	(6)	•    Genie tv Essence and NETFLIX premium service
NETFLIX Choice HD	￦38,800	￦29,680		266	(6)	•    Genie tv Essence and NETFLIX standard service
SuperPack Choice	￦36,300	￦29,480		266	(6)	•    Genie tv Essence and free movie, drama and animation contents
VOD Choice	￦31,020	￦24,816		266	(6)	•    Genie tv Essence and monthly coupon of ￦10,000 for video-on-demand
Essence Plus	￦28,160	￦22,484		266	(6)	•    Genie tv Essence and monthly coupon of ￦5,000 for video-on-demand
Essence	￦25,300	￦20,240		266	(6)
Lite	￦19,800	￦15,840		240	(3)
Basic	￦18,150	￦14,740		236	(3)
Slim	￦16,500	￦13,200		220	(3)
Genie tv skylife
Entertainment	￦31,020	￦24,816		228	(6)	•    Monthly coupon of ￦10,000 for video-on-demand.
Slim	￦16,500	￦13,200		220	(6)

Bundled Rate Plans

In order to provide our customers with additional value and further promote our marketing efforts to cross sell our various services, we provide our customers with various bundled rate plans that provide discounts for subscribing to a combination of our services, as well as family plans that provide discounts for multiple line subscriptions under one household. The majority of our subscribers participate in our bundled rate plans.

Fixed-line Packages

We offer substantial discounts to customers who subscribe to two or more of our fixed-line and TV services consisting of fixed-line telephone, VoIP telephone, broadband Internet access, IPTV and satellite TV services. Subscription payments collected pursuant to our bundled rate plans are allocated to each service.

Mobile Packages

For our mobile services, we offer family plans that provide monthly discounts of up to ￦11,000 per mobile phone subscription. Up to five members of a household may participate in our family plans.

Fixed-line and Mobile Combination Packages

We also offer various bundled rate plans that combine our fixed-line and TV services with mobile services, for both households and single subscribers. For households that subscribe to broadband Internet access as well as mobile services, our premium family plan provides discounts of approximately 50% for broadband Internet access subscription as well as for mobile services of each additional family member (up to four additional members).

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Competition

We face significant competition in each of our principal business areas. In the markets for mobile services, fixed-line services and media and content services, we compete primarily with SK Telecom and LG U+ (including their affiliates). Over time, considerable consolidation in the telecommunications industry has occurred, resulting in the current competitive landscape comprising three network service providers that offer a wide range of telecommunications and data communications services. In recent years, each of our primary competitors has acquired a leading cable TV operator in Korea to significantly increase their market shares in the pay TV market, which has further intensified competition.

To a lesser extent, we also compete with various value-added service providers and network service providers as classified under the Framework Act on Telecommunications and the Telecommunications Business Act, including MVNOs that lease mobile networks and offer mobile services, VoIP service providers that offer Internet telephone services, cable TV operators, text messaging service providers (particularly Kakao) and voice resellers, many of which offer competing services at lower prices. We also face changes in the evolving landscape of the market for media and content services arising from the increasing popularity of global OTT media services such as Netflix. In January 2023, the MSIT announced plans to encourage a fourth service provider to enter the Korean mobile service market by awarding a bandwidth license for the use of the 28 GHz spectrum and provide various measures to support the competitiveness of the new market entrant. In January 2024, Stage X, a consortium led by Stage Five, won the auction for 800 MHz of bandwidth license on the 28 GHz spectrum. Stage X is expected to commence service in the first half of 2025 to become the fourth nationwide mobile service provider, subject to satisfaction of applicable regulatory requirements.

We compete primarily based on our service performance, quality and reliability, ability to accurately identify and respond to evolving consumer demand, and pricing. With the launch of 5G mobile services in April 2019, competition has further intensified among the three network service providers, which has resulted in an increase in marketing expenses, as well as additional capital expenditures related to implementing 5G mobile services. Mobile service providers also grant subsidies or subscription discount rates to subscribers who purchase new handsets and agree to a minimum subscription period, and we compete also based on such amounts. We and SK Telecom have been designated as market-dominating business entities in the local telephone and mobile markets, respectively, under the Telecommunications Business Act. Under this Act, a market-dominating business entity may not engage in any act of abuse, such as unreasonably interfering with business activities of other business entities, hindering unfairly the entry of newcomers or substantially restricting competition to the detriment of the interests of consumers. In addition, changes in our local telephone rates and mobile rates of SK Telecom are required to be reported to the MSIT, which has 15 days to object to such changes. The KCC has also issued guidelines on fair competition of the telecommunications companies.

In the financial services market, our credit and check cards issued under the “BC Card” brand pursuant to co-brand agreements with member companies compete principally with cards issued by other leading credit card companies in Korea with their own merchant payment networks, such as Shinhan Card, Hyundai Card and Samsung Card. Our member companies that issue co-branded credit or check cards include Woori Card, NH Card, Industrial Bank of Korea and KB Kookmin Card. We also compete with service providers that provide outsourcing services related to business operations of credit card companies. Competition in the credit card and check card businesses has increased substantially as existing credit card companies, consumer finance companies and other financial institutions in Korea have made significant investments and engaged in aggressive marketing campaigns and promotions for their credit and check cards, as well as investing in operational infrastructure that may reduce the need for our outsourcing services.

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The following tables show the market shares in our principal markets in terms of subscribers as of the dates indicated:

Mobile Services

	Market Share (%) (1)
	KT Corporation		SK Telecom		LG U+
December 31, 2021		31.3		44.0		24.7
December 31, 2022		31.3		42.9		25.8
December 31, 2023		29.7		40.4		29.9

Source: The MSIT.

(1) Includes subscribers of MVNOs that lease mobile networks of the respective mobile service provider.

Fixed-line Local Telephone and VoIP Services

	Market Share (%)
	KT Corporation		SK Broadband		LG U+
December 31, 2021		64.1		14.9		12.7
December 31, 2022		63.1		14.9		12.7
December 31, 2023		62.3		14.9		12.7

Source: Korea Telecommunications Operators Association.

Broadband Internet Access Services

	Market Share (%)
	KT Corporation		SK Broadband		LG U+		Others
December 31, 2021		41.2		28.7		20.7		9.4
December 31, 2022		41.3		28.5		21.0		9.2
December 31, 2023		40.8		28.7		21.4		9.1

Source: The MSIT.

IPTV Services

	Market Share (%)
	KT Corporation (1)		SK Broadband		LG U+
December 31, 2021		44.3		29.8		25.9
December 31, 2022		44.3		30.6		25.1
December 31, 2023		43.6		31.2		25.2

Source: Investor relations report of each company.

(1) Includes market share of IPTV services offered by KT Skylife.

Regulation

With the establishment of the MSIP in March 2013, many of the regulatory responsibilities formerly handled by the KCC have been transferred to the MSIP. On July 26, 2017, the MSIP was renamed as the Ministry of Science and ICT. Under the Framework Act on Telecommunications and the Telecommunications Business Act, the MSIT continues to have comprehensive regulatory authority over the telecommunications industry and all network service providers.

Since the establishment of its predecessor, the MSIP, the MSIT has assumed primary policy and regulatory responsibility for matters such as: (i) registration of network service providers and licensing of select services (the MSIT authorizes the licensing of IPTV service providers and, with the

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consent of the KCC, authorizes the licensing of satellite broadcasting companies); (ii) regulation of mergers and acquisitions, as well as license suspension and termination of network service providers; (iii) providing oversight on foreign ownership ratios in network service providers; and (iv) reviewing telecommunication matters as they relate to the public interest and approving ancillary telecommunication business activities. Additionally, the MSIT is responsible for a broad range of other policy and regulatory matters, including the administration and supervision of regulatory reporting by telecommunications companies, examination and analysis of accounting and business management practices in the industry, establishment and administration of policies governing telecommunications service fees, value-added service providers and network service providers, as well as supervision of reporting requirements of standard telecommunications service/user contracts.

The KCC’s overall policy role is to play a key role in regulatory activities aimed at protecting service users in the broadcast and telecommunications market and it continues to be responsible for investigations and sanctions regarding violations by telecommunications companies, as well as for mediating disputes between service providers and users. The KCC is established under the direct jurisdiction of the President of Korea and is comprised of five standing commissioners. Commissioners of the KCC are appointed by the President, and the appointment of the Chairperson must be approved at a confirmation hearing at the National Assembly.

Under the Personal Information Protection Act, telecommunications service providers are also required to protect personal information of their customers. Generally, when a telecommunications service provider intends to collect or use its customer’s personal information, such telecommunications service provider, with certain exceptions, must notify and receive the customers’ consent in relation to the purpose of collection, the use of the collected personal information, types of personal information collected and period during which the personal information will be possessed and used. Certain exceptions for collecting or using personal information without consent came into effect on September 15, 2023 under the amended Personal Information Protection Act, which relaxed the regulations to some extent. Under the Personal Information Protection Act, any enterprise, including Korean telecommunications providers, may not use their customers’ personal information for any purpose other than the purpose their customers have consented to. In addition, there are various internal processes that the telecommunications providers are mandated to install in order to collect and handle personal information of their customers.

The MSIT also has the authority to regulate the pay TV market, including IPTV services. Under the Internet Multimedia Broadcasting Services Act, anyone intending to engage in the Internet multimedia broadcasting business must obtain a license from the MSIT. The ownership of the shares of an Internet multimedia broadcasting company by a newspaper, a news agency or a foreigner is limited.

Rates

Under current regulations implementing the Telecommunications Business Act, a network service provider may set its rates at its discretion, although it must report to the MSIT the rates and the general terms and conditions for each type of network service provided by it. However, the MSIT may object to the rates set by a market-dominating business entity within 15 days from the date of receipt of such report if there is a high risk of (i) harming the users’ interests (including unfair discrimination against specific users based on contract length and usage volume with such service provider) or (ii) harming fair competition (including the provision of telecommunication services at unfair rates compared to the wholesale price offered by other telecommunications service providers). In 1997, the MSIP designated us for local telephone service and SK Telecom for mobile service as market-dominating business entities, which currently remains in effect. As a result, changes in our local telephone rates and in the mobile rates of SK Telecom are required to be reported to the MSIT, which

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has 15 days to object to such changes. The form of our standard agreement for providing local network service and each agreement for interconnection with other service providers must also be reported to the MSIT.

In January 2024, the Government announced its plan to repeal the Mobile Device Distribution Improvement Act, which remains subject to passage by the National Assembly of the Republic of Korea, in order to encourage mobile service providers to offer differentiated benefits to customers. Under the Mobile Device Distribution Improvement Act, a subscriber is entitled to receive either a designated handset subsidy related to the purchase of a recently released mobile phone, or a designated discount on the mobile service subscription rate. In connection with such policy, the Government amended the Enforcement Decree of the Mobile Device Distribution Improvement Act in March 2024, pursuant to which mobile service providers may provide more liberal subsidies to subscribers that are switching their mobile service providers based on certain criteria specified by the KCC, including the estimated profit margins of the mobile service providers and subscribers’ costs of switching their service providers. In addition, the MSIT may periodically announce policy guidelines that telecommunications companies are recommended to take into consideration in their telecommunications and Internet-related businesses.

Other Activities

A network service provider, such as us, must obtain the permission of the MSIT in order to:

• modify its licenses;

• discontinue, suspend or spin off all or a part of the business for which it is licensed;

• transfer or acquire all or a part of the business of another network service provider; or

• enter into a merger with another network service provider.

By submitting a report to the MSIT, a network service provider may enter into arrangements for services to be furnished to its customers by a different telecommunications service provider and, in connection therewith, may provide its telecommunications services to, or authorize the use of all or a portion of its telecommunications facilities by, such other telecommunications service provider. The MSIT can revoke our licenses or order the suspension of any of our businesses if we do not comply with the regulations of the MSIT under the Telecommunications Business Act.

The responsibilities of the MSIT include:

• drafting and implementing plans for developing telecommunications technology;

• fostering and providing guidance to institutions and entities that conduct research relating to telecommunications; and

• recommending to network service providers that they invest in research and development or that they contribute to telecommunications research institutes in Korea.

In addition, all network service providers (other than regional paging service providers) are obligated to contribute toward the supply of “universal” telecommunications services in Korea. Telecommunications service providers designated as “universal service providers” by the MSIT are required to provide universal telecommunications services such as local services, local public telephone services, broadband services, discount services for persons with disabilities and for certain

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low-income persons, telecommunications services for remote islands and wireless communication services for ships. We have been designated as a universal service provider. The costs and losses recognized by universal service providers in connection with providing these universal telecommunications services, except for discount services for persons with disabilities and for certain low-income persons, will be shared on an annual basis by all network service providers (other than regional paging service providers), including us, on a pro rata basis based on their respective net annual revenue calculated pursuant to a formula set by the MSIT. As for the costs and losses recognized by a universal service provider in connection with providing discount services for persons with disabilities and for certain low-income persons, such costs and losses will be borne by such universal service provider.

Prior to April 2018, in accordance with the MSIT’s determination that we possessed essential infrastructure, we were required to permit other fixed-line communications service providers to co-use our fixed-line telecommunication infrastructure, upon the request of such other fixed-line telecommunications service providers. Subsequently, to facilitate expedient establishment of 5G mobile services infrastructure, the Government amended the co-use system as follows: (i) we should permit not only fixed-line telecommunications service providers, but also mobile service providers such as SK Telecom and LG U+ to co-use our telecommunications infrastructure necessary for provision of 5G mobile services, (ii) the Government determined that we, SK Telecom, SK Broadband and LG U+ possessed essential infrastructure with respect to the interval between the cable entry at a building and the initial occurrence of connection within the building and required that the three companies share such infrastructure throughout buildings in Korea with each other, and (iii) fixed-line telecommunications service providers and mobile service providers are required to participate in joint efforts to construct additional fixed-line and mobile network architecture. For more information on our mobile network architecture, see “Item 4.D. Property, Plant and Equipment—Mobile Networks.”

In addition, we are required to lease to other companies our fixed-lines that connect subscribers to our network. This system, which is called local loop unbundling, is intended to prevent excessive investment in local loops. This system requires us to lease the portion of our copper lines that represent our excess capacity to other companies upon their request at rates that are determined by the MSIT based on our cost, and taking into consideration an appropriate rate of return, to enable them to provide voice and broadband services. Revenue from local loop unbundling, if any, are recognized as revenue from other businesses.

All telecommunications service providers must also provide compensation to their users in the following cases: (i) damage is caused to the user in connection with the service provider’s provision of telecommunication services (including from disruptions in service) and (ii) damage is caused to the user due to the reasons stated in such user’s complaint addressed to the service provider or a delay in the service provider’s processing of such complaint. However, if damage to a user is caused by force majeure, or if damage is caused intentionally by, or due to the negligence of, the user, the service provider’s liability for any compensation to such user is mitigated or absolved. In cases where the provision of telecommunication services is disrupted, the service provider must inform its user of the disruption as well as the standards and procedures for obtaining compensation for any damages.

In addition, if the number of users and the network traffic of a value-added service provider exceeds a certain threshold set by the MSIT, such value-added service provider must secure adequate measures to provide stable services to its users, which may require cooperation with other network service providers. According to an amendment to the Telecommunications Business Act effective July 2023, a value-added service provider that (i) averages greater than one million domestic users per day during the last three months of the preceding year and (ii) records domestic communication traffic volume in excess of a certain threshold set by the MSIT is obligated, among other things, to submit to the MSIT information regarding the status and its plans on measures to provide stable services, on an annual basis.

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Furthermore, pursuant to an amendment to the Telecommunications Business Act in December 2023, which will become effective on June 30, 2024, a network service provider that exceeds certain threshold set by the MSIT will be obliged to make efforts to provide stable services by (i) taking certain technical and managerial measures, (ii) submitting the implementation results of the technical and managerial measures to the MSIT and (iii) disclosing the report regarding their actions taken to provide stable services. Such thresholds are expected to be specified through an amendment to the Enforcement Decree of the Telecommunications Business Act that will become effective on June 30, 2024.

Foreign Investment

The Telecommunications Business Act restricts the ownership and control of network service providers by foreign shareholders. Foreigners (based on citizenship), foreign governments and “companies deemed as foreigners” may not in the aggregate own more than 49.0% of the issued shares with voting rights of a network service provider, including us. For purposes of the Telecommunications Business Act, the term “company deemed as a foreigner” means a company in which a foreigner or a foreign government is the largest shareholder and holds 15.0% or more of the company’s shares with voting rights, provided, however, that such company will not be counted as a foreign shareholder for the purposes of the 49.0% limit if (1) it holds less than 1.0% of our total issued and outstanding shares with voting rights or (2) if the MSIT determines that the fact that such foreign government or entity holds a 15.0% or greater shareholding in such company does not present a risk of harm to the public interest. 

Notwithstanding the above, pursuant to an amendment to the Telecommunications Business Act that became effective in April 2022, a company, so long as (i) its largest shareholder (determined by aggregating the shareholdings of such shareholder and its related parties) is a foreign government or a foreigner of a country that has entered into a bilateral or multilateral free trade agreement with Korea that is designated by the MSIT, and (ii) such shareholder (together with the shareholdings of its related parties) owns 15.0% or more of the issued voting stock of such entity, may own more than 49.0% of our issued shares with voting rights but may not exercise its voting rights with respect to the shares held in excess of the 49.0% ceiling until the conclusion of the MSIT’s public interest review. Furthermore, pursuant to an amendment to the Telecommunications Business Act that became effective in December 2022, this exemption from the restriction of foreign ownership of a network service provider beyond the 49.0% threshold applies not only to a foreign government or a foreigner from an FTA Country but also to a foreign government or a foreigner from an OECD country.

In addition, the calculation of the above-referenced 49% ceiling applies to: (x) any foreign entities that have entered into a major management-related agreement with a network service provider or the shareholder(s) thereof; and (y) foreign entities that have entered into an agreement pertaining to the settlement of fees relating to the handling of international electronic telecommunications services. As of December 31, 2023, 43.2% of our common shares were owned by foreign investors. In the event that a network service provider violates the shareholding restrictions, its foreign shareholders cannot exercise voting rights for their shares in excess of such limitation, and the MSIT may require corrective measures be taken to comply with the ownership restrictions.

In addition to the 49.0% limit referenced above, under the Telecommunications Business Act, a foreign shareholder who holds 5.0% or more of our total shares is prohibited from becoming our largest shareholder. However, any foreign shareholder who held 5.0% or more of our total shares and was our largest shareholder on or prior to May 9, 2004 is exempt from the regulations, provided that such foreign shareholder may not acquire any more of our shares. In addition, under the Telecommunications Business Act, the MSIT may, if it deems it necessary to preserve substantial public interests, prohibit a foreign shareholder from being our largest shareholder. In the event that any

41

foreigner or foreign government acquires our shares in violation of the above provisions, the Telecommunications Business Act restricts such foreign shareholder from exercising his or her voting rights with respect to common shares exceeding such threshold. The MSIT may also order us or the foreign shareholder to take corrective measures in respect of the excess shares within a period of up to six months.

Customers and Customer Billing

We typically charge residential subscribers and business subscribers similar rates for services provided. On a case-by-case basis, we also provide discount rates for some of our high-volume business subscribers. We bill all of our customers on a monthly basis. Our customers may make payment at either payment points such as local post offices, banks or our service offices, through a direct-debit service that automatically deducts the monthly payment from a subscriber’s designated bank account, or through a direct-charge service that automatically charges the monthly payment to a subscriber’s designated credit card account. Approximately 89.2% of our subscribers as of December 31, 2023 pay through the direct-debit service. Accounts of subscribers who fail to pay our invoice are transferred to a collection agency, which sends out a notice of payment. If such charges are not paid after notice, we cease to provide outgoing service to such subscribers after a period of time determined by the type of subscribed service. If charges are still not paid two to three months after outgoing service is cut off, we cease all services to such subscribers. After service is ceased, the overdue charges that are not collected by the collection agency are written off.

Credit Card Business

Through BC Card in which we held a 69.5% interest as of December 31, 2023, we offer various credit card processing and related financial services. BC Card is regulated and supervised as a Specialized Credit Financial Business (“SCFB”), as defined under the Specialized Credit Financial Businesses Act of Korea (“SCFBA”). The SCFBA subjects SCFB companies to licensing (for credit card businesses) and registration (for leasing, installment finance or new technology finance businesses) requirements and provides guidance and restrictions regarding capital adequacy, liquidity ratios, loans to major shareholders, reporting and other matters relating to the supervision of SCFB companies. The SCFBA delegates regulatory authority over SCFB companies to the FSC and FSS. The FSC has the authority to suspend the operations of an SCFB company for up to six months for non-compliance with certain regulations under the SCFBA and issue certain administrative orders. The FSC is also entitled to cancel a license or registration if an SCFB company fails to comply with certain SCFBA regulations or FSC administrative orders, including a suspension order.

The SCFBA and the regulations thereunder require an SCFB company to satisfy a minimum paid-in capital amount of (i) W20 billion, where the SCFB company engages in no more than two kinds of core businesses and (ii) W40 billion, where the SCFB company, such as BC Card, engages in three or more kinds of core businesses. An SCFB engaging in a credit card business must maintain a total Tier I and Tier II capital adequacy ratio (adjusted equity capital divided by adjusted total assets) of 8% or more. In addition, an SCFB company must maintain a one-month-or-longer delinquent claim ratio (delinquent claims divided by total claims) of less than 10%.

Under the SCFBA and the regulations thereunder, an SCFB company is required to maintain a Won liquidity ratio (Won-denominated current assets divided by Won-denominated current liabilities) of 100% or more. In addition, if an SCFB company is registered as a foreign exchange business institution with the MOEF, such SCFB company is required to maintain (1) a foreign-currency liquidity ratio (foreign currency liquid assets due within three months divided by foreign-currency liabilities due within three months) of not less than 80%, (2) a ratio of foreign currency liquid assets due within seven days less foreign currency liabilities due within seven days, divided by total foreign-currency assets, of

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not less than 0%, and (3) a ratio of foreign currency liquid assets due within a month less foreign currency liabilities due within a month, divided by total foreign-currency assets, of not less than negative 10%.

Under the SCFBA and the regulations thereunder, an SCFB company may not provide loans in the aggregate exceeding 50% of its equity capital to its major shareholders (including their specially related persons).

Pursuant to the SCFBA and the regulations thereunder, an SCFB company is required to submit business reports to the FSC regarding, among others, financial statements, actual results of management and soundness of assets. An SCFB company is also required to provide information regarding specific matters, including: (i) the amount of loans provided to major shareholders as of the end of each quarter; (ii) changes in the aggregate amount of such loans and the terms and conditions of the credit extension transactions for each quarter; (iii) the amount of stocks acquired by major shareholders as of the end of each quarter; and (iv) changes in the aggregate amount of stocks held and the acquisition price of such stocks for each quarter, in each case within one month of the end of each quarter. In addition, an SCFB company is required to file a report to the FSC upon the occurrence of certain events, including (i) changes to its name; (ii) changes to the largest shareholder; or (iii) changes of 1% or more in the ownership of stocks with voting rights held by a major shareholder and such major shareholder’s specially related persons, in each case within seven days from the date of its occurrence.

Insurance

We carry insurance against loss or damage to all significant buildings and automobiles. Except for our insurance coverage of our satellites and data centers, we do not carry insurance covering losses to outside plants or to equipment because we believe the cost of such insurance is excessive and the risk of material loss or damage is insignificant. We do not have any provisions or reserves against such loss or damage. We do not carry any business interruption insurance.

We provide co-location and a variety of value-added services including server-hosting services to a number of corporations whose business largely depends on critical data operated on our servers or on their servers located at our data centers. Any disruptions, interruptions, physical or electronic data loss, delays or slowdowns in communication connections could expose us to potential liabilities for losses relating to the disrupted businesses of our customers relying on our services.

Information Technology and Operational Systems

Enhancement of our information technology and operational systems and efficient utilization of such systems are important in effectively promoting our core strategies. We are committed to continually investing in and enhancing our information technology systems, which provide support to many aspects of our businesses. In June 2017, a business support system, called KT One System (“KOS”), was implemented. KOS is our wired/wireless system integration program that unified wired/wireless workflows, structures and systems that had been separated previously. KOS has contributed to enhancing various aspects of our business processes and control systems.

Patents and Licensed Technology

The ability to obtain and protect intellectual property rights to the latest telecommunications technology is important for our business. We own or have licenses to various patents and trademarks in Korea and overseas, and have applications for patents pending in Korea and other select countries such as the United States, Europe, China and Japan. A majority of our patents registered in Korea and

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overseas relate to our wireless and fixed-line telecommunications, media services and technologies related to IoT and artificial intelligence. In addition, we operate several research and development (“R&D”) laboratories to develop latest technology and additional platforms, as described in “Item 5.C. Research and Development, Patents and Licenses, Etc.” We license our intellectual property rights to third parties in return for periodic royal payments. We currently do not license any material technologies or patents from third parties.

Seasonality of the Business

Our main business generally does not experience significant seasonality.

Item 4.C.  Organizational Structure

These matters are discussed under Item 4.B. where relevant.

Item 4.D.  Property, Plant and Equipment

Our principal fixed asset is our integrated telecommunications networks. In addition, we own buildings and real estate throughout Korea. As of December 31, 2023, the net book value of our property and equipment was ￦14,872 billion, of which ￦3,843 billion is accounted for by the net book value of our land, buildings and structures. As of December 31, 2023, the net book value of our investment properties, which is accounted for separately from our property and equipment, was ￦2,198 billion. Other than as may be described in this annual report, no significant amount of our properties is leased. There are no material encumbrances on our properties including the fixed assets below.

Mobile Networks

Our mobile network architecture includes the following components:

• cell sites, which are physical locations equipped with radio units of base transceiver stations and other equipment used to communicate through radio channels with subscribers’ mobile telephone handsets within the range of a cell;

• centralized centers, which are physical locations with baseband units of base transceiver stations;

• core networks, which connect to and control the base transceiver stations and provide the gateway to other networks and services; and

• transmission lines, which connect the mobile switching centers, base station controllers, base transceiver stations and the public switched telephone network.

One of the principal limitations on a wireless network’s subscriber capacity is the amount of bandwidth allocated to a service provider. We have acquired a number of bandwidth licenses to secure additional bandwidth capacity to provide our broad range of services, for which we typically make an initial payment as well as pay usage fees during the license period. See “Item 5. Operating and Financial Review and Prospects—Item 5.A. Operating Results—Overview—Acquisition of New Bandwidth Licenses and Usage Fees.”

Exchanges

Exchanges include local exchanges and “toll” exchanges that connect local exchanges to long-distance transmission facilities. We had approximately 20.9 million lines connected to local exchanges and 2.4 million lines connected to toll exchanges as of December 31, 2023.

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All of our exchanges are fully digital and automatic in order to provide higher speed and larger volume services. In addition, all of our lines connected to toll exchanges are compatible to IP platform.

Internet Backbone

Our Internet backbone network, called KORNET, has the capacity to handle aggregate traffic of our broadband Internet access subscribers, data centers and Internet exchange system at any given moment of up to 39.2 Tbps as of December 31, 2023. Our IP premium network enables us to more reliably support IPTV, VoIP and other IP-related services. As of December 31, 2023, our IP premium network had capacity of 4.4 Tbps to support LTE data, IPTV, voice and virtual private network (“VPN”) service traffic. In addition, our 5G backbone network had capacity of 5.0 Tbps to support 5G data service traffic.

Access Lines

As of December 31, 2023, we had 25.5 million access lines installed, which allow us to reach virtually all homes and businesses in Korea. As of December 31, 2023, we had approximately 25.4 million broadband lines with speed of at least 50 Mbps that enable us to deliver broadband Internet access and multimedia contents to our customers. 

Transmission Networks

Our domestic fiber optic cable network consisted of 937,147 kilometers of fiber optic cables as of December 31, 2023 of which 136,875 kilometers of fiber optic cables are used to connect our backbone network and 800,272 kilometers are used to connect the backbone network to our subscribers. As of December 31, 2023, our backbone network utilizes 64 Tbp Long-haul Reconfigurable Optical Add Drop Multiplexer (“ROADM”) technology for connecting cities. ROADM technology improves bandwidth efficiency by enabling data to be transmitted from multiple signals across one fiber strand in a cable and carrying each signal on a separate wavelength. Our transmission backbone network connecting major cities in Korea utilize Packet Optical Transport Network (“POTN”), and we access such network through multi-service provisioning platform (“MSPP”) architecture.

Our extensive domestic long-distance network is supplemented by our fully digital domestic microwave network, which consisted of 52 relay sites as of December 31, 2023.

International Networks

Our international network infrastructure consists of both submarine cables and satellite transmission systems, including two submarine cable-landing stations in Busan and Keoje and one satellite teleport in Kumsan. International traffic is handled by submarine cables and telecommunications satellites. Because of the high cost of laying a submarine cable, the usual practice is for multiple carriers to jointly commission a new cable and share the costs and the capacity. We own interests in several international fiber optic submarine cable networks. We also operate satellites periodically launched by us, as well as lease satellite capacity from other satellite operators. Data services such as international private lease circuits, IP and very small aperture terminals are provided through submarine cables and satellite transmission. In order to guarantee high quality services to our end customers, our submarine cables and satellite transmission systems are linked to various points-of-presence in the United States, Asia and Europe. In addition, as of December 31, 2023, our international telecommunications networks were directly linked to 263 telecommunications service

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providers in various international destinations and are routed through our three international switching centers in Seoul, Daejeon and Busan.

As of December 31, 2023, our international Internet backbone with capacity of approximately 8,340 Gbps is connected to approximately 320 Internet service and content providers through our two Internet gateways in Busan. In addition, we operate a broadcasting backbone with capacity of 0.86 Gbps to transmit broadcasting signals from Korea to the rest of the world.

Item 4A.  Unresolved Staff Comments

We do not have any unresolved comments from the Securities and Exchange Commission staff regarding our periodic reports under the Exchange Act.

Item 5.  Operating and Financial Review and Prospects

Item 5.A.  Operating Results

The following discussion and analysis is based on our consolidated financial statements, which have been prepared in accordance with IFRS as issued by the IASB.

Overview

We are an integrated provider of telecommunications services. Our principal telecommunications and Internet-related services include mobile voice and data telecommunications services, fixed-line services (consisting of fixed-line telephone, VoIP telephone, broadband Internet access and data communication services) and media and content services (including IPTV and satellite TV). The principal factors affecting our revenue from these services have been our rates for, and the usage volume of, these services, as well as the number of subscribers. For information on rates we charge for our services, see “Item 4. Information on the Company—Item 4.B. Business Overview—Our Rates.” In addition, we derive revenue from credit card processing and other financial services, sale of goods (primarily handsets related to our mobile services and miscellaneous telecommunications equipment, as well as sale of residential units and commercial real estate developed KT Estate), and miscellaneous business activities including information technology and network services, real estate development and satellite services.

Our five operating segments for financial reporting purposes are organized as the following:

• the ICT segment, which primarily consists of KT Corporation on a standalone basis that is primarily engaged in providing various telecommunications and platform services to individual, household and corporate customers as well as selling handsets;

• the finance segment, which engages in providing various financial services such as credit card services and value-added network and payment gateway services;

• the satellite TV segment, which engages in satellite TV services;

• the real estate segment, which engages in real property development and leasing services; and

• the others segment, which includes (i) information technology and network services, (ii) contents and commerce services, (iii) security services, (iv) satellite service, (v) global business services that provide global network services to multinational or domestic corporate customers and telecommunications companies and (vi) miscellaneous services provided by our subsidiaries.

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Our future performance will depend at least in part on Korea’s general economic growth and prospects. For a description of recent developments that have had and may continue to have an adverse effect on our results of operations and financial condition, see “Item 3. Key Information—Item 3.D. Risk Factors—If economic conditions in Korea deteriorate, our current business and future growth could be materially and adversely affected” and “—COVID-19 and any possible occurrences of other types of widespread infectious diseases could materially and adversely affect our business, financial condition or results of operations.” A number of other developments have had or are expected to have a material impact on our results of operations, financial condition and capital expenditures. These developments include:

• acquisition of new bandwidth licenses and usage fees;

• researching and implementing technology upgrades and additional telecommunications services;

• changes in the rate structure for our telecommunications services;

• acquisitions and disposals of interests in subsidiaries and joint ventures; and

• marketing activities.

As a result of these factors, our financial results in the past may not be indicative of future results or trends in those results.

Acquisition of New Bandwidth Licenses and Usage Fees

One of the principal limitations on a wireless network’s subscriber capacity is the amount of bandwidth allocated to a service provider. The growth of our mobile telecommunications business and the increase in usage of wireless data transmission services have been significant factors in the increased utilization of our bandwidth, since wireless data applications are generally more bandwidth-intensive than voice services. The current trend of increasing data transmission use and the increasing sophistication of multimedia contents are likely to put additional strain on the bandwidth capacity of mobile service providers. We have acquired a number of licenses in recent years to secure additional bandwidth capacity to provide our broad range of services, for which we typically make an initial payment as well as pay usage fees during the license period. The MSIT reserves the right to reallocate bandwidths in order to address the changing needs for bandwidth capacity of mobile service providers, the consideration for which may depend on the extent of the buildout of the service provider’s telecommunications network to utilize the relevant bandwidth. For example, in recent years, the MSIT cancelled the bandwidth licenses for the use of the 28 GHz spectrum that had been issued to us, SK Telecom and LG U+, noting the failure to meet certain agreements made with the MSIT at the time of the license allocations.

For all of our bandwidth licenses, we made aggregate payments of ￦603 billion in 2021, ￦319 billion in 2022 and ￦327 billion in 2023. The following table sets forth our outstanding payment obligations relating to our bandwidth licenses as of December 31, 2023.

Spectrum

Bandwidth

License Acquisition Date

Total Payable Amount (in billions of Won)

Total remaining amount (in billions of Won)

Initial Payment Amount (in billions of Won)

Initial Payment Year

Annual Usage Fee (in billions of Won)

Annual Usage Fee Payment Term

900 MHz

20 MHz

July 1, 2021

￦

141

￦

67

￦

35

2021

￦

21

2021 to 2026

1.8 GHz

35 MHz

July 1, 2021

￦

548

￦

260

￦

137

2021

￦

82

2021 to 2026

1.8 GHz

20 MHz

Aug. 4, 2016

￦

470

￦

111

￦

118

2016

￦

35

2016 to 2026

2.1 GHz

40 MHz

Dec. 6, 2021

￦

412

￦

195

￦

103

2021

￦

62

2021 to 2026

3.5 GHz

100 MHz

Dec. 1, 2018

￦

968

￦

392

￦

242

2018

￦

73

2018 to 2028

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Researching and Implementing Technology Upgrades and Additional Telecommunications Services such as 5G Technologies

The telecommunications industry is characterized by continued advances and improvements in telecommunications technology, and we have been continually researching and implementing network upgrades and launching additional telecommunications services to maintain our competitiveness. In recent years, we have made extensive efforts to continue to develop mobile services with enhanced speed, latency and connectivity that enable us to offer significantly improved wireless data transmission with faster access to multimedia content.

We also make investments to continually upgrade our broadband network to enable better FTTH connection, which further enhances data transmission speed and connection quality. FTTH is a telecommunication architecture in which a communication path is provided over optical fiber cables extending from the telecommunications operator’s switching equipment to the boundary of home or office. FTTH uses fiber optic cable, which is able to carry a high-bandwidth signal for longer distances without degradation. FTTH enables us to deliver enhanced services that require high bandwidth with stability, such as IPTV and other digital media content. The MSIT has the authority to recommend to network service providers that they provide funds for national research and development of telecommunications technology and related projects. Including such contributions, total expenditures (which include capitalized expenses) on research and development were ￦214 billion in 2021, ￦231 billion in 2022 and ￦225 billion in 2023. We plan to continue to invest in researching and implementing network upgrades, which will entail additional operating expenses as well as capital expenditures.

Fee Discounts and Adjustments to the Rates for Our Telecommunications Services

We provide bundled packages of our various services at a discount in order to attract additional subscribers to our new services. We offer discounts to customers who subscribe to two or more of our fixed-line and TV services consisting of fixed-line telephone, VoIP telephone, broadband Internet access, IPTV and satellite TV services. For our mobile services, we offer a family plan that provides a discount for each additional mobile phone subscription. We also offer various bundled rate plans that combine our fixed-line and TV services with mobile services, for both households and single subscribers. See “Item 4. Information on the Company—Item 4.B. Business Overview—Our Rates.”

Changes in our local telephone rates are required to be reported to the MSIT, which has 15 days to object to such changes. The form of our standard agreement for providing local network service and each agreement for interconnection with other service providers must also be reported to the MSIT. Although we compete freely with other network service providers in terms of rate plans for our principal telecommunications and Internet-related services except for rates we charge for local calls, the MSIT may periodically announce policy guidelines that we may be recommended to take into consideration.

The Government may pursue additional measures to regulate the markets in which we compete. There can be no assurance that we will not adopt additional measures that reduce rates charged to our subscribers as well as adjustments to our handset subsidies and other measures in the future to comply with regulatory requirements or the Government’s policy guidelines. For a discussion of adjustments in our rate structure, see “Item 4. Information on the Company—Item 4.B. Business Overview—Our Rates.”

Acquisitions and Disposals of Interests in Subsidiaries and Joint Ventures

One key aspect of our overall business strategy calls for acquisitions of businesses and entering into joint ventures that complement or diversify our current business, as well as disposal or

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termination of such businesses from time to time. For example, in September 2021, KT Skylife, in which we held a 50.3% interest as of December 31, 2023, completed its acquisition of a 100.00% interest in HCN, which is Korea’s fifth largest cable operator. The identification of suitable acquisition candidates can be difficult, time-consuming and costly, and our financial condition and results of operations may be affected as a result of such acquisitions, disposals or consolidation. Furthermore, pursuing acquisitions, joint venture and certain investment transactions also requires significant capital, and as we pursue further growth opportunities for the future, we may need to raise additional capital by incurring loans or through the issuances of bonds or other securities in the international capital markets, which may lead to increased levels of debt and debt servicing costs in the future.

Marketing Activities

In January 2024, the Government announced its plan to repeal the Mobile Device Distribution Improvement Act, which remains subject to passage by the National Assembly of the Republic of Korea, in order to encourage mobile service providers to offer differentiated benefits to customers. Under the Mobile Device Distribution Improvement Act, a subscriber is entitled to receive either a designated handset subsidy related to the purchase of a recently released mobile phone, or a designated discount on the mobile service subscription rate. In connection with such policy, the Government amended the Enforcement Decree of the Mobile Device Distribution Improvement Act in March 2024, pursuant to which mobile service providers may provide more liberal subsidies to subscribers that are switching their mobile service providers based on certain criteria specified by the KCC, including the estimated profit margins of the mobile service providers and subscribers’ costs of switching their service providers. Any such amendments to, or the repeal of, the Mobile Device Distribution Improvement Act may have a material impact on the competitive landscape of the mobile telecommunications industry as mobile service providers are given more flexibility to provide handset subsidies or discounts, which may in turn increase expenses.

While we believe that our large subscriber base as well as the brand power of our products and services will remain key drivers of our growth, we expect to continue to invest significantly in marketing activities, particularly in connection with launching of new products and services. Our marketing expenses may not directly correspond to our revenue in the same period, and our quarterly marketing expenses have fluctuated in the past and are expected to continue to fluctuate in the future.

Explanatory Note Regarding Presentation of Certain Financial Information under K-IFRS

In addition to preparing financial statements in accordance with IFRS as issued by the IASB included in this annual report, we prepare financial statements in accordance with K-IFRS, which we are required to file with the Financial Services Commission and the Korea Exchange under the FSCMA.

K-IFRS differs in certain respects from IFRS as issued by the IASB in the presentation of operating profit. Additionally, under K-IFRS, revenue from the development and sale of real estate is recognized using the percentage of completion method. However, under IFRS as issued by the IASB, revenue from the development and sale of real estate is recognized when an individual unit of residential real estate is delivered to the buyer. Primarily due to such differences, our consolidated statements of comprehensive income and our consolidated statements of financial position prepared in accordance with IFRS as issued by the IASB included in this annual report differ from our consolidated statements of comprehensive income and consolidated statements of financial position prepared in accordance with K-IFRS.

The table below sets forth a reconciliation of our operating profit and net income or loss as presented in our consolidated statements of profit or loss prepared in accordance with IFRS as issued

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by the IASB for each of the years ended December 31, 2021, 2022 and 2023 to our operating profit and net income or loss in our consolidated statements of profit or loss prepared in accordance with K-IFRS, for each of the corresponding years, taking into account such differences:

	For the Year Ended December 31,
	2021			2022			2023
	(In billions of Won)
Operating profit under IFRS as issued by the IASB	￦	1,699		￦	1,968		￦	1,428
Differences under K-IFRS requiring other income and other expenses to be distinguished from operating revenue		(28	)		(280	)		200
Revenue recognition of development, sale of real estate, etc.		—			3			22
Operating profit under K-IFRS	￦	1,672		￦	1,690		￦	1,650

	For the Year Ended December 31,
	2021		2022		2023
	(In billions of Won)
Net income under IFRS as issued by the IASB	￦	1,459	￦	1,386	￦	972
Revenue recognition of development, sale of real estate, etc.		—		3		22
Income tax		—		1		(5	)
Profit for the year under K-IFRS	￦	1,459	￦	1,388	￦	989

Changes in Accounting Policies

For a summary of new standards, amendments and interpretations issued under IFRS as issued by the IASB, see Note 2.2 of the notes to the Consolidated Financial Statements.

Operating Revenue and Operating Expenses

Operating Revenue

Our operating revenue primarily consists of:

• fees related to our mobile services, including monthly fees, usage charges for outgoing calls, usage charges for wireless data transmission, contents download fees, mobile-to-mobile interconnection revenue and value-added monthly service fees;

• fees from our fixed-line services, including:

Ø fees from our fixed-line and VoIP telephone services, which include:

Ø monthly basic charges, which are one-time or monthly fixed charges primarily consisting of (i) non-refundable activation fees; and (ii) monthly fixed charges from local telephone services (or monthly fixed charges for discount plans);

Ø monthly usage charges, which are usage fees based on the amount of services used, primarily consisting of (i) monthly usage charges for local telephone and domestic long distance services; (ii) international long-distance service revenue, (primarily (a) amounts we bill to our customers for outgoing calls made to foreign countries, (b) amounts we bill to foreign telecommunications carriers for connection to the domestic telephone network in respect of incoming calls at the applicable settlement rate, and (c) other revenue, including revenue from international leased lines); (iii) land-to-mobile and land-to-land interconnection revenue; and (iv) interconnection fees we charge to fixed-line and mobile service providers and voice resellers for their use of our local, domestic long-distance and international networks in providing their services; and

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Ø other revenue from (i) value-added services, local telephone directory assistance, call waiting and caller identification services; and (ii) local, domestic long-distance and international calls placed from public telephones;

Ø broadband Internet access service revenue, primarily consisting of installation fees and basic monthly charges; and

Ø data communication services, primarily consisting of installation fees and basic monthly charges for our fixed-line and satellite leased line services and Kornet Internet connection service;

• revenue from media and content services, primarily consisting of installation fees and basic monthly charges of IPTV and satellite TV services, as well as revenue from digital music services, e-commerce services, online advertising consulting services and web comics and novels services;

• financial service revenue, primarily consisting of fees from credit card services provided by BC Card, our consolidated subsidiary in which we held a 69.5% interest as of December 31, 2023;

• revenue from our miscellaneous business activities categorized as “others,” including information technology and network services and rental of real estate; and

• revenue from sale of goods, primarily handsets related to our mobile services and miscellaneous telecommunications equipment, as well as sale of residential units and commercial real estate developed by KT Estate.

Operating Expenses

Our operating expenses primarily include:

• purchase of inventories, primarily consisting of (i) inventories purchased for our sale of mobile handsets and (ii) development costs of KT Estate for real estate units to be sold, and changes of inventories, which reflects increases or decreases of inventories of handsets, phones and for-sale real estate units during the applicable period;

• salaries and wages, including post-employment benefits, termination benefits (including severance benefits for voluntary and special early retirements) and share-based payments;

• card service costs, primarily consisting of costs in connection with credit and cash card services provided by BC Card, including fees paid to member credit card companies in our network for marketing expenses;

• depreciation expenses incurred primarily in connection with our telecommunications network facilities;

• sales commissions, primarily consisting of sales commissions to third-party dealers related to procurement of mobile subscribers and mobile handset sales;

• service cost, primarily consisting of payments to IPTV and satellite TV content providers;

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• commissions, primarily consisting of commission-based payments for certain third-party outsourcing services, including commissions to the outsourced call center staff;

• amortization expenses incurred primarily in connection with our intangible assets; and

• interconnection charges, which are interconnection payments to telecommunication service providers for calls from landline users and our mobile subscribers to our competitors’ subscribers.

Operating Results—2022 Compared to 2023

The following table presents selected income statement data and changes therein for 2022 and 2023:

	For the Year Ended December 31,						Changes
							2022 vs. 2023
	2022			2023			Amount			%
	(In billions of Won)
Operating revenue	￦	26,234		￦	26,595		￦	361			1.4	%
Operating expenses		24,266			25,167			901			3.7
Operating profit		1,968			1,428			(540	)		(27.4	)
Finance income		690			486			(204	)		(29.6	)
Finance costs		750			569			(181	)		(24.2	)
Share of net profits of associates and joint ventures		(17	)		(43	)		(26	)		151.2
Profit before income tax		1,891			1,303			(589	)		(31.1	)
Income tax expense		506			330			(175	)		(34.7	)
Profit for the year	￦	1,386		￦	972			(413)			(29.8	)

Operating Revenue

The following table presents a breakdown of our operating revenue and changes therein for 2022 and 2023:

	For the Year Ended December 31,				Changes
					2022 vs. 2023
Products and services	2022		2023		Amount			%
	(In billions of Won)
Mobile services	￦	7,014	￦	7,140	￦	126			1.8	%
Fixed-line services:
Fixed-line and VoIP telephone services		1,378		1,249		(129	)		(9.4	)
Broadband Internet access services		2,505		2,579		74			2.9
Data communication services		1,173		1,315		141			12.0
Subtotal		5,057		5,142		86			1.7
Media and content services		3,100		3,207		107			3.4
Financial services		3,837		3,968		131			3.4
Others		3,834		3,846		12			0.3
Sale of goods (1)		3,394		3,293		(101	)		(3.0	)
Total operating revenue	￦	26,234	￦	26,595		361			1.4

(1) Primarily related to sale of handsets for our mobile service and miscellaneous telecommunications equipment, as well as sale of residential units and commercial real estate developed by KT Estate.

Total operating revenue increased by 1.4%, or ￦361 billion, from ￦26,234 billion in 2022 to ￦26,595 billion in 2023 primarily due to increases in revenue from data communication services,

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financial services, mobile services, media and content services and broadband Internet access services, which impact was partially offset by decreases in revenue from fixed-line and VoIP telephone services and sale of goods.

Mobile Services

Our mobile services revenue increased by 1.8%, or ￦126 billion, from ￦7,014 billion in 2022 to ￦7,140 billion in 2023 primarily due to increases in the number of our mobile subscribers and our average revenue per subscriber.

We recorded a 3.5% increase in our mobile subscribers from approximately 24.1 million (including 8.5 million subscribers of 5G services) as of December 31, 2022 to approximately 24.9 million (including 9.9 million subscribers of 5G services) as of December 31, 2023.

Our average revenue per user increased by 3.5%, or ￦1,162, from ￦32,803 in 2022 to ￦33,965 in 2023 mainly due to an increase in our users subscribing to 5G services.

Fixed-line Services

Our fixed-line services revenue increased by 1.7%, or ￦86 billion, from ￦5,057 billion in 2022 to ￦5,142 billion in 2023, reflecting increases in revenue from data communication services and broadband Internet access services, the impact of which was partially offset by a decrease in revenue from fixed-line and VoIP telephone services.

Fixed-line and VoIP Telephone Services. Our fixed-line and VoIP telephone services revenue decreased by 9.4%, or ￦129 billion, from ￦1,378 billion in 2022 to ￦1,249 billion in 2023 primarily due to a decrease in the number of PSTN and VoIP lines in service from 12.5 million as of December 31, 2022 to 12.0 million as of December 31, 2023.

Broadband Internet Access Services. Our broadband Internet access services revenue increased by 2.9%, or ￦74 billion, from ￦2,505 billion in 2022 to ￦2,579 billion in 2023 primarily due to an increase in the number of subscribers to our premium services. The number of our KT GiGA Internet service subscribers increased from approximately 6.5 million as of December 31, 2022 to approximately 6.7 million as of December 31, 2023. 

Data Communication Services. Our data communication services revenue increased by 12.0%, or ￦141 billion, from ￦1,173 billion in 2022 to ￦1,315 billion in 2023 primarily due to increases in revenue from (i) major content service providers that experienced increases in traffic volume and (ii) provision of additional backbone lines to global content service providers.

Media and Content Services

Our media and content services revenue increased by 3.4%, or ￦107 billion, from ￦3,100 billion in 2022 to ￦3,207 billion in 2023 primarily due to (i) an increase in the number of IPTV subscribers subscribing to higher priced premium plans and (ii) an increase in the production and sale of original contents. The number of IPTV subscribers remained constant at approximately 9.4 million as of December 31, 2022 and 2023.

Financial Services

Financial services revenue increased by 3.4%, or ￦131 billion, from ￦3,837 billion in 2022 to ￦3,968 billion in 2023 primarily due to an increase in fees from credit card services of BC Card.

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Others

Other operating revenue increased by 0.3%, or ￦12 billion, from ￦3,834 billion in 2022 to ￦3,846 billion in 2023 primarily due to increases in revenue from our information technology and network services, particularly from the operation of Internet data centers and systems integration services.

Sale of Goods

Revenue from sale of goods decreased by 3.0%, or ￦101 billion, from ￦3,394 billion in 2022 to ￦3,293 billion in 2023 primarily reflecting a decline in sales of mobile handsets.

Operating Expenses

The following table presents a breakdown of our operating expenses and changes therein for 2022 and 2023:

	For the Year Ended December 31,						Changes
							2022 vs. 2023
	2022			2023			Amount			%
	(In billions of Won)
Salaries and wages	￦	4,496		￦	4,549		￦	54			1.2	%
Depreciation		2,637			2,724			86			3.3
Depreciation of right-of-use assets		396			403			7			1.6
Amortization of intangible assets		622			684			62			9.9
Commissions		1,295			1,265			(31	)		(2.4	)
Interconnection charges		480			437			(43	)		(8.9	)
International interconnection fee		186			140			(46	)		(24.6	)
Purchase of inventories		3,656			3,595			(61	)		(1.7	)
Changes of inventories		(195	)		(203	)		(8	)		4.1
Sales commissions		2,354			2,353			(1	)		(0.0	)
Service costs		2,334			2,237			(97	)		(4.2	)
Utilities		368			545			176			47.9
Taxes and dues		277			251			(26	)		(9.5	)
Rent		161			168			7			4.2
Insurance premium		68			67			(2	)		(2.2	)
Installation fees		150			174			24			16.1
Advertising expenses		196			154			(42	)		(21.4	)
Allowance for bad debts		115			151			35			30.5
Card service costs		3,128			3,189			62			2.0
Loss on disposal of property and equipment		81			73			(9	)		(10.7	)
Loss on disposal of intangible assets		7			5			(2	)		(24.0	)
Loss on disposal of right-of-use assets		2			2			(0	)		(9.9	)
Impairment loss on property and equipment		16			8			(8	)		(51.1	)
Impairment loss on intangible assets		31			236			205			662.8
Donations		16			25			9			57.7
Other allowance for bad debts		18			34			17			94.4
Others		1,370			1,902			533			38.9
Total operating expenses	￦	24,266		￦	25,167			901			3.7

Total operating expenses increased by 3.7%, or ￦901 billion, from ￦24,266 billion in 2022 to ￦25,167 billion in 2023 primarily due to increases in other expenses, impairment loss on intangible assets, utilities and depreciation expenses, which impact was partially offset by decreases in service costs and purchase of inventories. Specifically:

• Other expenses increased by 38.9%, or ￦533 billion, from ￦1,370 billion in 2022 to ￦1,902 billion in 2023 primarily due to increases in interest costs and credit losses of BC

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Card, which were adversely impacted by increases in interest rates throughout 2022 that remained relatively high in 2023.

• Impairment loss on intangible assets increased by 662.8%, or ￦205 billion, from ￦31 billion in 2022 to ￦236 billion in 2023 primarily due to (i) impairment of goodwill of ￦119 billion related to Epsilon Global Communications Pte. Ltd. in 2023 and (ii) impairment of goodwill of ￦98 billion related to HCN in 2023.

• Utilities increased by 47.9%, or ￦176 billion, from ￦368 billion in 2022 to ￦545 billion in 2023 primarily due to increases in unit prices of electricity and our usage volume thereof.

• Depreciation expenses increased by 3.3%, or ￦86 billion, from ￦2,637 billion in 2022 to ￦2,724 billion in 2023 primarily reflecting increase in depreciable assets.

These factors were partially offset by the following:

• Service costs decreased by 4.2%, or ￦97 billion, from ￦2,334 billion in 2022 to ￦2,237 billion in 2023 primarily due to decreases in corporate messaging volume and interconnection fees.

• Purchase of inventories decreased by 1.7%, or ￦61 billion, from ￦3,656 billion in 2022 to ￦3,595 billion in 2023 primarily due to a decrease in purchase of mobile handsets used in connection with subscription of our mobile services.

Operating Profit

Due to the factors described above, our operating profit decreased by 27.4%, or ￦540 billion, from ￦1,968 billion in 2022 to ￦1,428 billion in 2023. Our operating margin, which is operating profit as a percentage of operating revenue, was 7.5% in 2022 and 5.4% in 2023.

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Finance Income (Costs)

The following table presents a breakdown of our finance income and costs and changes therein for 2022 and 2023:

	For the Year Ended December 31,				Changes
					2022 vs. 2023
	2022		2023		Amount			%
	(In billions of Won)
Interest income	￦	272	￦	280	￦	8			2.8	%
Gain on foreign currency transactions		68		27		(41	)		(59.7	)
Gain on foreign currency translation		43		12		(31	)		(72.3	)
Gain on settlement of derivatives		51		12		(38	)		(75.7	)
Gain on valuation of derivatives		183		50		(133	)		(72.7	)
Gain on disposal of trade receivables		—		3		3			N.A.	(1)
Gain on valuation of financial instruments		31		32		1			4.7
Others		43		69		26			62.0
Total finance income	￦	690	￦	486		(204	)		(29.6	)
Interest expenses	￦	294	￦	356		62			21.3
Loss on foreign currency transactions		81		34		(47	)		(57.8	)
Loss on foreign currency translation		200		96		(104	)		(52.2	)
Loss on settlement of derivatives		24		0		(24	)		(98.3	)
Loss on valuation of derivatives		22		7		(15	)		(69.5	)
Loss on disposal of trade receivables		63		18		(45	)		(71.3	)
Loss on valuation of financial instruments		66		55		(11	)		(16.2	)
Others		0		2		2			370.5
Total finance costs	￦	750	￦	569		(181	)		(24.2	)

N.A. means not available.

Our interest expenses increased by 21.3%, or ￦62 billion, from ￦294 billion in 2022 to ￦356 billion in 2023 primarily due to general increases in interest rates in Korea and abroad in 2023 compared to 2022.

Our net loss on foreign currency translation decreased by 46.6%, or ￦84 billion, from ￦157 billion in 2022 to ￦84 billion in 2023, as the Won depreciated against the U.S. dollar at year-end 2022 and further depreciated (to a lesser extent) at year-end 2023. In terms of the Market Average Exchange Rate, the Won depreciated against the U.S. dollar from ￦1,185.5 to US$1.00 as of December 31, 2021 to ￦1,267.3 to US$1.00 as of December 31, 2022, and further depreciated to ￦1,289.4 to US$1.00 as of December 31, 2023. In addition, our net loss on foreign currency transactions decreased by 47.9%, or ￦6 billion, from ￦13 billion in 2022 to ￦7 billion in 2023, as the average value of the Won against the U.S. dollar depreciated in 2022 and further depreciated (to a lesser extent) in 2023. The Market Average Exchange Rate, which was ￦1,144.4 to US$1.00 as of December 31, 2021, depreciated during 2022 to an average of ￦1,292.0 to US$1.00 in 2022 and further depreciated during 2023 to an average of ￦1,305.4 to US$1.00 in 2023. Against such fluctuations, our net gain on valuation of derivatives decreased by 73.2%, or ￦118 billion, from ￦161 billion in 2022 to ￦43 billion in 2023, and our net gain on derivative transactions decreased by 54.9%, or ￦14 billion, from ￦26 billion in 2022 to ￦12 billion in 2023.

Our loss on disposal of trade receivables decreased by 71.3%, or ￦45 billion, from ￦63 billion in 2022 to ￦18 billion in 2023 primarily due to a decrease in loss from our sale of handset receivables.

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Share of Net Losses of Associates and Joint Ventures

Our share of net losses of associates and joint ventures increased by 151.2%, or ￦26 billion, from ￦17 billion in 2022 to ￦43 billion in 2023. In 2022, our share of net loss of associates and joint ventures consisted primarily of our share of loss from Megazone Cloud Corporation of ￦23 billion as well as various other associates, the impact of which was partially offset by our share of profit from K Bank of ￦29 billion. In 2023, our share of net loss of associates and joint ventures consisted primarily of our share of loss from (i) a real estate investment company invested by KT Estate of ￦25 billion, (ii) IGIS Professional Investors Private Investment Real Estate Investment LLC No. 395 of ￦5 billion and (iii) Megazone Cloud Corporation of ￦5 billion, the impact of which was partially offset by our share of profit from KIF Investment Fund of ￦5 billion.

Income Tax Expense

Income tax expense decreased by 34.7%, or ￦175 billion, from ￦506 billion in 2022 to ￦330 billion in 2023, as our profit before income tax decreased by 31.1%, or ￦589 billion, from ￦1,891 billion in 2022 to ￦1,303 billion in 2023. Our effective tax rate was 26.7% in 2022 and 25.4% in 2023. See Note 29 of the notes to the Consolidated Financial Statements.

Profit for the Year

Due to the factors described above, our profit for the year decreased by 29.8%, or ￦413 billion, from ￦1,386 billion in 2022 to ￦972 billion in 2023. Our net profit margin, which is net profit for the year as a percentage of operating revenue, was 5.3% in 2022 and 3.7% in 2023.

Segment Results—ICT

The following table presents selected income statement data of the ICT segment and changes therein for 2022 and 2023:

	For the Year Ended December 31,				Changes
					2022 vs. 2023
	2022		2023		Amount			%
	(In billions of Won)
Operating revenue	￦	18,697	￦	18,699	￦	2			0.0	%
Operating expenses		17,350		17,506		156			0.9
Operating income		1,347		1,193		(154	)		(11.4	)
Depreciation and amortization (1)		3,106		3,183		78			2.5

(1) Sum of the amortization of tangible assets, intangible assets, investment properties and right-of-use assets.

The operating revenue for our ICT segment, prior to adjusting for inter-segment transactions, increased slightly by ￦2 billion, from ￦18,697 billion in 2022 to ￦18,699 billion in 2023, primarily due to increases in revenue from our data communication services, mobile services, broadband Internet access services and IPTV services, which impact was offset by decreases in revenue from our fixed-line and VoIP telephone services, as described above.

The operating income for our ICT segment, prior to adjusting for inter-segment transactions, decreased by 11.4%, or ￦154 billion, from ￦1,347 billion in 2022 to ￦1,193 billion in 2023, as the ￦156 billion increase in the segment’s operating expenses outpaced the ￦2 billion increase in operating revenue. For this segment, operating margin, which is operating profit as a percentage of total operating revenue prior to adjusting for inter-segment transactions, decreased from 7.2% in 2022 to 6.4% in 2023.

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Depreciation and amortization for our ICT segment, prior to adjusting for inter-segment transactions, increased by 2.5%, or ￦78 billion, from ￦3,106 billion in 2022 to ￦3,183 billion in 2023.

Segment Results—Finance

The following table presents selected income statement data of the finance segment and changes therein for 2022 and 2023:

	For the Year Ended December 31,				Changes
					2022 vs. 2023
	2022		2023		Amount			%
	(In billions of Won)
Operating revenue	￦	3,615	￦	3,723	￦	108			3.0	%
Operating expenses		3,496		3,632		136			3.9
Operating income		120		92		(28	)		(23.5	)
Depreciation and amortization (1)		48		37		(10	)		(22.0	)

(1) Sum of the amortization of tangible assets, intangible assets, investment properties and right-of-use assets.

The operating revenue for our finance segment, prior to adjusting for inter-segment transactions, increased by 3.0%, or ￦108 billion, from ￦3,615 billion in 2022 to ￦3,723 billion in 2023 primarily due to an increase in standalone revenue of BC Card’s value added network business.

The operating income for our finance segment, prior to adjusting for inter-segment transactions, decreased by 23.5%, or ￦28 billion, from ￦120 billion in 2022 to ￦92 billion in 2023, as the ￦136 billion increase in the segment’s operating expenses outpaced the ￦108 billion increase in operating revenue. For this segment, operating margin decreased from 3.3% in 2022 to 2.5% in 2023.

Depreciation and amortization for our finance segment, prior to adjusting for inter-segment transactions, decreased by 22.0%, or ￦10 billion, from ￦48 billion in 2022 to ￦37 billion in 2023.

Segment Results—Satellite TV

The following table presents selected income statement data of the satellite TV segment and changes therein for 2022 and 2023:

	For the Year Ended December 31,					Changes
						2022 vs. 2023
	2022		2023			Amount			%
	(In billions of Won)
Operating revenue	￦	709	￦	715		￦	5			0.8	%
Operating expenses		689		785			95			13.8
Operating income (loss)		20		(70	)		(90	)		N.A.	(1)
Depreciation and amortization (2)		58		53			(6	)		(9.5	)

(1) N.A. means not applicable.

(2) Sum of the amortization of tangible assets, intangible assets, investment properties and right-of-use assets.

The operating revenue for our satellite TV segment, prior to adjusting for inter-segment transactions, increased by 0.8%, or ￦5 billion, from ￦709 billion in 2022 to ￦715 billion in 2023 due to an increase in consolidated operating revenue of KT Skylife.

The satellite TV segment recognized operating income, prior to adjusting for inter-segment transactions, of ￦20 billion in 2022 compared to operating loss, prior to adjusting for inter-segment

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transactions, of ￦70 billion in 2023, as the ￦95 billion increase in the segment’s operating expenses outpaced the ￦5 billion increase in operating revenue. Operating expenses for this segment increased by 13.8% from 2022 to 2023 primarily due to an increase in expenses related to procurement of programs for our channels. For this segment, operating income margin was 2.8% in 2022 and operating loss margin was 9.8% in 2023.

Depreciation and amortization for our satellite TV segment, prior to adjusting for inter-segment transactions, decreased by 9.5%, or ￦6 billion, from ￦58 billion in 2022 to ￦53 billion in 2023.

Segment Results—Real Estate

The following table presents selected income statement data of the real estate segment and changes therein for 2022 and 2023:

	For the Year Ended December 31,				Changes
					2022 vs. 2023
	2022		2023		Amount			%
	(In billions of Won)
Operating revenue	￦	475	￦	500	￦	25			5.3	%
Operating expenses		362		427		65			17.9
Operating income		113		73		(40	)		(35.0	)
Depreciation and amortization (1)		65		71		5			7.9

(1) Sum of the amortization of tangible assets, intangible assets, investment properties and right-of-use assets.

The operating revenue for our real estate segment, prior to adjusting for inter-segment transactions, increased by 5.3%, or ￦25 billion, from ￦475 billion in 2022 to ￦500 billion in 2023 primarily due to increases in revenues from apartment presales and hotel operations.

The operating income for our real estate segment, prior to adjusting for inter-segment transactions, decreased by 35.0%, or ￦40 billion, from ￦113 billion in 2022 to ￦73 billion in 2023, as the ￦65 billion increase in the segment’s operating expenses outpaced the ￦25 billion increase in operating revenue. Operating margin for this segment decreased from 23.8% in 2022 to 14.7% in 2023 primarily due to decreases in operating profits from disposal of real estate properties.

Depreciation and amortization for our real estate segment, prior to adjusting for inter-segment transactions, increased by 7.9%, or ￦5 billion, from ￦65 billion in 2022 to ￦71 billion in 2023.

Segment Results—Others

The following table presents selected income statement data of the others segment and changes therein for 2022 and 2023:

	For the Year Ended December 31,				Changes
					2022 vs. 2023
	2022		2023		Amount			%
	(In billions of Won)
Operating revenue	￦	7,960	￦	8,145	￦	185			2.3	%
Operating expenses		7,487		8,048		561			7.5
Operating income		473		98		(376	)		(79.4	)
Depreciation and amortization (1)		575		585		10			1.7

(1) Sum of the amortization of tangible assets, intangible assets, investment properties and right-of-use assets.

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The operating revenue for our others segment, prior to adjusting for inter-segment transactions, increased by 2.3%, or ￦185 billion, from ￦7,960 billion in 2022 to ￦8,145 billion in 2023, primarily due to an increase in revenue from our information technology and network services, particularly from the operation of Internet data centers and systems integration services.

The operating income for our others segment, prior to adjusting for inter-segment transactions, decreased by 79.4%, or ￦376 billion, from ￦473 billion in 2022 to ￦98 billion in 2023, as the ￦561 billion increase in the segment’s operating expenses outpaced the ￦185 billion increase in the segment’s operating revenue. Operating margin for this segment decreased from 5.9% in 2022 to 1.2% in 2023.

Depreciation and amortization for this segment, prior to adjusting for inter-segment transactions, increased by 1.7%, or ￦10 billion, from ￦575 billion in 2022 to ￦585 billion in 2023.

Operating Results—2021 Compared to 2022

For a discussion of our operating results of 2021 compared to 2022, please see “Item 5.A. Operating Results—Operating Results—2021 Compared to 2022” of our Form 20-F for the fiscal year ended December 31, 2022, which we filed with the Securities and Exchange Commission on April 28, 2023.

Item 5.B.  Liquidity and Capital Resources

The following table sets forth the summary of our cash flows for the years indicated:

	For the Years Ended December 31,
	2021			2022			2023
	(In billions of Won)
Net cash inflow from operating activities	￦	5,562		￦	3,597		￦	5,503
Net cash outflow from investing activities		(5,137	)		(4,839	)		(4,621	)
Net cash inflow (outflow) from financing activities		(41	)		669			(453	)
Cash and cash equivalents at beginning of the year		2,635			3,020			2,449
Cash and cash equivalents at end of the year		3,020			2,449			2,880
Net increase (decrease) in cash and cash equivalents		384			(571	)		430

Capital Requirements

Historically, our capital requirements consisted principally of purchases of property and equipment and other assets and repayments of borrowings. In our investing activities, we used cash of ￦3,495 billion in 2021, ￦3,440 billion in 2022 and ￦3,693 billion in 2023, for the acquisition of property and equipment and investment properties. In addition, we used cash of ￦752 billion in 2021, ￦545 billion in 2022 and ￦479 billion in 2023 for the acquisition of intangible assets, which consisted primarily of acquisition of bandwidth licenses. In our financing activities, we used cash of ￦1,999 billion in 2021, ￦2,843 billion in 2022 and ￦5,275 billion in 2023, for repayments of borrowings. From time to time, we may also require capital for investments involving acquisitions, including shares of our affiliates, and strategic relationships, as well as repurchases of our shares. We used cash of ￦194 billion in 2021, ￦0 in 2022 and ￦300 billion in 2023 for the repurchase of our shares.

Our cash dividends paid to shareholders and non-controlling interests amounted to ￦350 billion in 2021, ￦477 billion in 2022 and ￦527 billion in 2023.

We anticipate that capital expenditures and repayment of outstanding contractual obligations and commitments (including for bandwidth licenses) will represent the most significant use of funds for

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the next several years. We currently expect our capital expenditures for the acquisition of property and equipment and investment property and acquisition of intangible assets in 2024 to decrease slightly compared to those in 2023 on a standalone basis. However, the actual amount remains subject to adjustment depending on market conditions, our results of operations and changes in our build-out plan for our 5G mobile telecommunications network. We may also require capital for purchase of shares of our affiliates as well as investments involving acquisitions and strategic relationships.

Payments of contractual obligations and commitments will also require considerable resources. In our ordinary course of business, we routinely enter into commercial commitments for various aspects of our operations, including repair and maintenance. We have also provided guarantees to our affiliates. See Note 19 of the notes to the Consolidated Financial Statements for a disclosure of the guarantees provided.

Capital Resources

We have traditionally met our working capital and other capital requirements principally from cash provided by operations, while raising the remainder of our requirements primarily through debt financing. Our major sources of cash have been net cash provided by operating activities, including profits for the year, and proceeds from issuance of bonds and borrowings. We expect that these sources will continue to be our principal sources of cash in the future. We recorded profits for the year of ￦1,459 billion in 2021, ￦1,386 billion in 2022 and ￦972 billion in 2023 as discussed in “Item 5.A. Operating Results.” Non-cash expense adjustments in our statement of cash flows from depreciation, amortization of intangible assets and depreciation of right-of-use assets amounted to ￦3,647 billion in 2021, ￦3,711 billion in 2022 and ￦3,868 billion in 2023, primarily reflecting our capital investment activities during the recent years, including our payments on bandwidth licenses for our operations, investments in network infrastructures and acquisition of real estate.

We had net proceeds from borrowings and debentures, after adjusting for repayments of borrowings and debentures, of ￦900 billion in 2021, ￦1,391 billion in 2022 and ￦106 billion in 2023. Long-term borrowings, excluding current installments, were ￦6,706 billion in December 31, 2021, ￦8,180 billion in December 31, 2022 and ￦7,160 billion as of December 31, 2023. Total short-term borrowings were ￦1,731 billion as of December 31, 2021, ￦1,827 billion as of December 31, 2022 and ￦3,059 billion as of December 31, 2023. We periodically increase our short-term borrowings and adjust our long-term debt financing levels depending on changes in our capital requirements. For the maturity profile of our borrowings, their currency denomination and interest rates, see Note 15 of the notes to the Consolidated Financial Statements. Under our borrowing policy, we continually take into consideration various factors, including financial market conditions and our business environment, in order to decide on specific terms of the borrowing, such as borrowing amount, maturity date, currency denomination and type of interest rate (fixed or floating). We also strive to prudently manage our borrowing level and mitigate our refinancing risks through various methods, including diversification of currency denominations and borrowing lines. Our debt-to-equity ratio, which is calculated by dividing total liabilities by total equity, was 124% as of December 31, 2021, 123% as of December 31, 2022 and 131% as of December 31, 2023.

We also dispose of a portion of our trade receivables relating to handset sales to several special purpose companies, as part of our efforts to improve our cash and asset management. We entered into asset management agreements with each of these special purpose companies, and will be receiving management fees from such companies. See Note 19 of the notes to the Consolidated Financial Statements. From time to time, we also generate cash from the sale of our treasury shares.

We believe that we have sufficient working capital available to us for our current requirements and that we have a variety of alternatives available to us to satisfy our financial requirements to the

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extent that they are not met by funds generated by operations, including the issuance of debt securities and bank borrowings denominated in Won and various foreign currencies. See Note 15 of the notes to the Consolidated Financial Statements. However, our ability to rely on some of these alternatives could be affected by factors such as the liquidity of the Korean and the global financial markets, prevailing interest rates, our credit rating and the Government’s policies regarding Won currency and foreign currency borrowings. Other factors which could materially affect our liquidity in the future include unanticipated increase in capital expenditures and decrease in cash provided by operations resulting from a significant decrease in demand for our services. We may also need to raise additional capital sooner than we expect in order to fund unanticipated investments and acquisitions.

Our total equity was ￦16,567 billion as of December 31, 2021, ￦18,413 billion as of December 31, 2022 and ￦18,543 billion as of December 31, 2023.

Liquidity

We had a working capital (current assets minus current liabilities) surplus of ￦1,786 billion as of December 31, 2021, ￦1,991 billion as of December 31, 2022 and ￦1,347 billion as of December 31, 2023.

The following table sets forth the summary of our significant current assets for the years indicated:

	As of December 31,
	2021		2022		2023
	(In billions of Won)
Cash and cash equivalents	￦	3,020	￦	2,449	￦	2,880
Trade and other receivables, net		5,087		6,098		7,170
Inventories, net		514		718		988
Other financial assets		1,186		1,322		1,440

Our cash and cash equivalents (substantially all of which are in Won) totaled ￦3,020 billion as of December 31, 2021, ￦2,449 billion as of December 31, 2022 and ￦2,880 billion as of December 31, 2023. As of December 31, 2023, on a standalone basis, we held approximately 99.8% of our cash and cash equivalents denominated in Won and the remainder denominated in foreign currencies. Other current financial assets primarily consist of financial instruments, available-for-sale financial assets and derivative assets used for hedging. For a discussion of our use of financial instruments for hedging purposes, see “Item 11. Quantitative and Qualitative Disclosures about Market Risk.

The following table sets forth the summary of our significant current liabilities for the years indicated:

	As of December 31,
	2021		2022		2023
	(In billions of Won)
Trade and other payables	￦	6,641	￦	7,333	￦	8,055
Borrowings		1,731		1,827		3,059

Substantially all of our revenues are denominated in Won. Depreciation of the Won may materially affect the results of our operations because, among other things, it causes an increase in the amount of Won required by us to make interest and principal payments on our foreign currency-denominated debt, the costs of telecommunications equipment that we purchase from overseas sources, net settlement payments to foreign carriers and certain payments related to our derivative instruments entered into for foreign exchange risk hedging purposes. As of December 31, 2023, we

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entered into various commitments with financial institutions totaling ￦3,497 billion, US$2,047 million, EUR 8 million and SGD 400 million, of which ￦620 billion, US$2,047 million, EUR 8 million and SGD 400 million were used. See Note 19 of the notes to the Consolidated Financial Statements. Of the ￦10,218 billion total borrowings (including short-term borrowings) outstanding as of December 31, 2023, ￦2,801 billion was denominated in foreign currencies. See Note 15 of the notes to the Consolidated Financial Statements. Upon the identification and evaluation of our currency risk exposures, we, having considered various circumstances, enter into derivative financial instruments to manage such risks. See “Item 11. Quantitative and Qualitative Disclosures About Market Risk—Exchange Rate Risk and Interest Rate Risk.” We have not had, and do not anticipate that we will have, difficulty gaining access to short-term financing sufficient to meet our current requirements.

Item 5.C.  Research and Development, Patents and Licenses, Etc.

In order to maintain our leadership in the converging telecommunications business environment and develop additional platforms, services and applications, we engage in research and development (“R&D”) activities together with our various business units and also operate the following R&D laboratories:

• Small Language Model Development (“AI2XL”) R&D laboratory;

• Multi Large Language Model Enterprise Go-to-Market Technology (“AI Tech”) R&D laboratory;

• Machine Learning and Deep Learning (“AI Service”) R&D laboratory; and

• New Emerging Technology (“Service Tech”) R&D laboratory.

As of December 31, 2023, KT Corporation had 3,868 domestic and 1,895 international registered patents.

The MSIT has the authority to recommend to network service providers that they provide funds for national research and development of telecommunications technology and related projects. Including such contributions, total expenditures (which include capitalized expenses) on research and development were ￦214 billion in 2021, ￦231 billion in 2022 and ￦163 billion in 2023.

Item 5.D.  Trend Information

These matters are discussed under Item 5.A. above where relevant.

Item 5.E.  Critical Accounting Estimates

Our financial statements are prepared in accordance with IFRS as issued by IASB. See Note 3 of the notes to our financial statements for a discussion of our critical accounting estimates.

Item 6.  Directors, Senior Management and Employees

Item 6.A.  Directors and Senior Management

Directors

Our board of directors has the ultimate responsibility for the administration of our affairs. Our articles of incorporation provide for a board of directors consisting of:

• up to two inside directors, including the Representative Director; and

• up to eight outside directors.

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All of our directors are elected at the general shareholders’ meeting. If the total assets of a company listed on the KRX KOSPI Market exceed ￦2,000 billion as of the end of the preceding year, which is the case with us, the Commercial Code of Korea requires such company to have more than three outside directors, with outside directors being the majority of the board of directors. Under our articles of incorporation, the term of office for a director is up to three years. Pursuant to an amendment to our articles of incorporation in March 2020, the term of office for an outside director changed from up to ten years to up to six years, which change was made to reflect an amendment to the enforcement decree of the Commercial Code of Korea. The terms for both an inside director and an outside director are, however, extended to the close of the annual shareholders’ meeting convened with respect to the last full fiscal year of a director’s term of office. If the term of office for a director is not completed and ends before the close of the annual general shareholders’ meeting and a new director is appointed in his or her place, the term of office for such replacement director will coincide with the uncompleted remaining term of office of his or her predecessor.

Under the Commercial Code of Korea, we must establish a committee to nominate candidates for outside directors within the board of directors, and outside directors must make up more than half of the total members of the outside director candidate nominating committee. According to our articles of incorporation, such committee must consist of all of our outside directors, other than for election of an outside director resulting from the expiration of the term of the office, in which case such outside director whose term is expiring may not be a member of the committee. Our Director Candidate Recommendation Committee nominates outside director candidates for appointment at the general shareholders’ meeting.

According to our articles of incorporation, upon the request of any director (to the extent that the board of directors does not separately authorize only a particular director to make such request), a meeting of the board of directors will be assembled. The chairperson of the board of directors is elected from among the outside directors by a resolution of the board of directors. The term of office of the chairperson is one year.

Our current directors are as follows:

Name	Position	Director Since		Date of Birth	Expiration of Term of Office
Inside Directors (1)
Young Shub Kim	Representative Director and Chief Executive Officer		August 2023	April 10, 1959		March 2026
Chang-Seok Seo	Senior Executive Vice President, Network Group		August 2023	July 5, 1967		March 2026
Outside Directors (1)
Jong Soo Yoon	Senior Advisor, Kim & Chang		June 2023	August 13, 1958		March 2026
Yong-Hun Kim	Partner, DR & AJU LLC		March 2022	March 29, 1955		March 2025
YangHee Choi	President, Hallym University		June 2023	July 27, 1955		March 2026
Woo-Young Kwak	Former Chairman of Steering Committee, Vehicle IT Fusion and Innovation Center, Ministry of Science and ICT		June 2023	September 3, 1956		March 2025
Yeong Kyun Ahn	Board member of IFAC		June 2023	February 6, 1959		March 2026
Seung Hoon Lee	Partner of KCGI Co., Ltd.		June 2023	December 25, 1962		March 2025
Seongcheol Kim	Professor, School of Media and Communication, Korea University		June 2023	June 12, 1964		March 2025
Seung Ah Theresa Cho	Professor, Strategic Management and International Business, Seoul National University Business School		June 2023	October 22, 1967		March 2026

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(1) All of our inside and outside directors beneficially own less than one percent of the issued shares of KT Corporation in the aggregate.

Our “Representative Director” is authorized to perform all judicial and extra-judicial acts relating to our business. Our shareholders elect the Representative Director in accordance with the provisions of the Commercial Code and our articles of incorporation. In June 2023, we amended our articles of incorporation in efforts to add more rigor and transparency to the process of selecting our Representative Director. Our Director Candidate Recommendation Committee conducts investigation and composition of a pool of candidates and selects the representative director candidates whose candidacy will be further examined. Subsequently, the Director Candidate Recommendation Committee examines and selects Representative Director candidates and submits an examination report of such candidates to our board of directors. A Representative Director candidate recommended by our board of directors is nominated at the shareholders’ meeting.

Under our articles of incorporation, the board of directors must submit a draft management contract between KT Corporation and the candidate covering our management objectives to the shareholders’ meeting at the time of candidate nomination to the meeting. When the draft management contract has been approved at the shareholders’ meeting, we enter into such management contract with the Representative Director. In such case, the chairperson of the board of directors, on our behalf, signs the management contract. In March 2020, our articles of incorporation were amended to have management goals be set based on objectives that can be accomplished during a Representative Director’s term in office.

The board of directors may conduct performance review discussions to determine if the new Representative Director performed his or her duties under the management contract, or hire a professional evaluation agency for such purpose. If the board of directors determines, based on the results of the performance review, that the new Representative Director has failed to achieve the management goals, it may propose to dismiss Representative Director at a shareholders’ meeting.

Senior Management

In addition to our inside directors who are also our executive officers, we have the following executive officers as of April 1, 2024:

Name	Title and Responsibility	Year of Birth
Soo-Jung Shin	Senior Executive Vice President, Strategy & New Business Group		1965
Chang-Yong Ahn	Senior Executive Vice President, Enterprise Business Group		1966
Seung-Phil Oh	Senior Executive Vice President, Tech. Innovation Group		1970
Young-Bok Lee	Senior Executive Vice President, Legal Affairs Office		1961
Hyeon-Seuk Lee	Senior Executive Vice President, Customer Business Group		1966
Hyun-Kyu Lim	Senior Executive Vice President, Corporate Management Group		1964
Choong-Rim Ko	Executive Vice President, Group Human Resources Office		1967
Kwang-Dong Kim	Executive Vice President, Corporate Relations Office		1970
Bong-Gyun Kim	Executive Vice President, Busan/Gyeongnam Regional Headquarter		1972
Young-In Kim	Executive Vice President, Western Seoul Regional Headquarter		1968
Young-Ho Kim	Executive Vice President, Southern Seoul Regional Headquarter		1966
Chae-Hee Kim	Executive Vice President, On External Training		1974
Hoon-Bae Kim	Executive Vice President, Media Business Unit		1963
Hye-Byung Min	Executive Vice President, Enterprise Business Strategy Unit		1969
Hyo-Il Park	Executive Vice President, Strategy Office		1970
Jeong-Hyun Seo	Executive Vice President, Legal Consulting Department		1971
Jin-Ho Yang	Executive Vice President, Litigation Management Department		1973
Kyung-Hwa Ok	Executive Vice President, IT Platform Unit		1968
Chang-Ho Yi	Executive Vice President, Chungnam/Chungbuk Regional Headquarter		1972
Min Jang	Executive Vice President, Financial Management Office		1968

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Name	Title and Responsibility	Year of Birth
Woo-Jin Jung	Executive Vice President, KT Consulting Group		1975
Hoon Cho	Executive Vice President, SCM Strategy Office		1966
Jung-Yong Ji	Executive Vice President, Jeonnam/Jeonbuk Regional Headquarter		1968
Si-Hwan Choi	Executive Vice President, Daegu/Gyeongbuk Regional Headquarter		1967
Chan-Ki Choi	Executive Vice President, Northern Seoul/Gangwon Regional Headquarter		1966
Eui-Jeung Choo	Executive Vice President, Audit Office		1976
Seong-Kwon Kang	Senior Vice President, Cloud/Platform Lead		1971
Lee-Hwan Kang	Senior Vice President, Micro Enterprise Business Unit		1970
Gang-Bon Koo	Senior Vice President, Western Seoul Customer Sales Headquarter		1972
Jae-Hyung Koo	Senior Vice President, Network Technology Unit		1972
Hye-Jin Kwon	Senior Vice President, Network Strategy Unit		1971
Hee-Keun Kwon	Senior Vice President, Sales Operating Business Unit		1970
Mong-Ryong Kim	Senior Vice President, Finance Customer Business Unit		1971
Byung-Kyun Kim	Senior Vice President, Device Business Unit		1968
Young-Geol Kim	Senior Vice President, Customer Business Unit		1973
Young-Min Kim	Senior Vice President, Modern IT Lead		1971
Yong-Nam Kim	Senior Vice President, Jeonnam/Jeonbuk Enterprise Customer Sales Headquarter		1969
Jae-Kwon Kim	Senior Vice President, DX Business Unit		1968
Jun-Ho Kim	Senior Vice President, Public Customer Business Unit		1965
Jee-Hyeon Kim	Senior Vice President, Partnership & Investment Department		1969
Jin-Chul Kim	Senior Vice President, Jeonnam/Jeonbuk Customer Sales Headquarter		1967
Hoon-Dong Kim	Senior Vice President, AI/Data Lead		1976
Hyeong-Rae Roh	Senior Vice President, Strategic Customer Business Unit		1970
Je-Hoon Myung	Senior Vice President, Enterprise Telecommunications Business Unit		1972
Sang-Ryong Moon	Senior Vice President, Information Security Unit		1967
Jung-Ho Park	Senior Vice President, EduDX Business Unit		1970
Soon-Min Bae	Senior Vice President, AI2X Lab		1980
Ki-Hong Seo	Senior Vice President, Daegu/Gyeongbuk Enterprise Customer Sales Headquarter		1967
Won-Je Sung	Senior Vice President, Southern Seoul Enterprise Customer Sales Headquarter		1972
Je-Hyun Sung	Senior Vice President, Northern Seoul/Gangwon Enterprise Customer Sales Headquarter		1972
Hoon-Joo Shin	Senior Vice President, On External Training		1971
Tae-Sung Oh	Senior Vice President, ESG Management & Implementation Unit		1968
Taek-Gyun Oh	Senior Vice President, Network O&M Unit		1968
Yong-Kyu Yoo	Senior Vice President, Strategy & New Business Planning Unit		1971
Kyung-A Yoon	Senior Vice President, AI Tech Lab		1973
Byoung-Hyu Yoon	Senior Vice President, Chungnam/Chungbuk Customer Sales Headquarter		1972
Jin-Hyoun Youn	Senior Vice President, Media R&D Department		1968
Tae-Sik Yoon	Senior Vice President, Brand Communication Department		1969
Mi-Hee Lee	Senior Vice President, Strategy & New Business Consulting & Implementation Unit		1970
Byeong-Moo Lee	Senior Vice President, Customer Experience Innovation Unit		1971
Sang-Ki Lee	Senior Vice President, Global Business Development Department		1970
Sang-Ho Lee	Senior Vice President, Robot Platform Business Department		1975
Sung-Kyu Lee	Senior Vice President, Northern Seoul/Gangwon Network O&M Headquarter		1969
Seong-Hwan Yi	Senior Vice President, Western Seoul Enterprise Customer Sales Headquarter		1968
Se-Jung Lee	Senior Vice President, AI Service Lab		1974
Young-Jun Lee	Senior Vice President, Chungnam/Chungbuk Enterprise Customer Sales Headquarter		1968
Jung-Woo Lee	Senior Vice President, Public Relations Office		1971
Jong-Sik Lee	Senior Vice President, Network Laboratory		1972
Chan-Seung Lee	Senior Vice President, Accounting Department		1968
Bo-Heon Im	Senior Vice President, Busan/Gyeongnam Network O&M Headquarter		1967
Seung-Hyouk Yim	Senior Vice President, Enterprise Business Consulting & Implementation Unit		1970
Du-Seong Chang	Senior Vice President, Large AI Core Tech. Department		1969
Byung-Gwan Jang	Senior Vice President, Win-Win Cooperation Department		1970
Kil-Sung Jung	Senior Vice President, Corporate Strategy Department		1974
Seon-Il Jeong	Senior Vice President, Southern Seoul Network O&M Headquarter		1968
Jae-Wook Jeong	Senior Vice President, Busan/Gyeongnam Customer Sales Headquarter		1972
Seong-Eun Cho	Senior Vice President, SW Development Unit		1971
Young-Sim Jin	Senior Vice President, Human Resources Development Department		1972

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Name	Title and Responsibility	Year of Birth
Kang-Rim Choi	Senior Vice President, Mobility Business Unit		1974
Woo-Hyung Choi	Senior Vice President, Core Network O&M Unit		1970
Joon-Ki Choi	Senior Vice President, AI Business Unit		1974
Ho-Chang Choi	Senior Vice President, Group Human Resources Department		1971
Tae-Won Hur	Senior Vice President, Compliance Office		1970
Tae-Jun Heo	Senior Vice President, Enterprise Sales Unit		1970
Hae-Chon Hong	Senior Vice President, Service Tech Lab		1972
Kyeng-Hee Hwang	Senior Vice President, Daegu/Gyeongbuk Network O&M Headquarter		1970

Item 6.B.  Compensation

Compensation of Directors and Executive Officers

In 2023, the aggregate compensation paid and accrued to all directors and executive officers was approximately ￦73.8 billion and the aggregate amount set aside or accrued by us to provide pension and retirement benefits to such persons was approximately ￦3.8 billion.

The compensation of our directors and executive officers in 2023 that was disclosed on an individual basis in Korea was as follows:

Name	Position	Total Compensation in 2023	Composition of Total Compensation
		(In millions of Won)
Hyeon-Mo Ku	Former Chief Executive Officer	￦3,073	￦335 (salary); ￦778 (bonus); ￦25 (benefits); ￦1,935 (severance pay)
Kook-Hyun Kang	Former President	￦2,571	￦364 (salary); ￦579 (bonus); ￦62 (benefits); ￦1,566 (severance pay)
Jong-Ook Park	Former President	￦2,134	￦381 (salary); ￦578 (bonus); ￦61 (benefits); ￦1,113 (severance pay)
Byung-Sam Park	Former Senior Executive Vice President	￦1,726	￦347 (salary); ￦471 (bonus); ￦59 (benefits); ￦849 (severance pay)
Hyun-Yok Sheen	Former Senior Executive Vice President	￦1,701	￦327 (salary); ￦398 (bonus); ￦68 (benefits); ￦908 (severance pay)
Chang-Seok Seo	Inside Director	￦864	￦342 (salary); ￦466 (bonus); ￦56 (benefits)
Kyoung-Lim Yun	Former Inside Director	￦812	￦111 (salary); ￦511 (bonus); W12 (benefits); ￦178 (severance pay)

The chairperson of our board of directors enters into an employment agreement on our behalf with our Representative Director. The employment agreement sets certain management targets to be achieved by the Representative Director as determined by the Evaluation and Compensation Committee each year, including a target for the amount of “EBITDA” to be achieved in each year. EBITDA is defined as earnings before interest, tax, depreciation and amortization. Other management targets include (i) short-term operational and strategic goals centered around key performance indices and (ii) increase on a long-term basis in shareholder value measured against performance of companies listed on KOSPI and the shares of our competitors. Failure to achieve certain thresholds below the targets will allow the board of directors to take actions with respect to the Representative Director’s employment, including proposing at the shareholders’ meeting an early termination of his employment. In addition, the head of each of our functional departments, the president of each of our

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subsidiaries and the heads of each regional head office have entered into employment agreements with the Representative Director that provide for similar management targets to be achieved by each of our departments, subsidiaries and regional head offices.

Item 6.C.  Board Practices

As of April 1, 2024, none of our inside or outside directors maintained directors’ service contracts with us or with any of our subsidiaries providing for benefits upon termination of employment.

Corporate Governance Committee

The Corporate Governance Committee is comprised of four outside directors (YangHee Choi, Woo-Young Kwak, Seung Hoon Lee and Seongcheol Kim). The chairperson is YangHee Choi. The committee is responsible for the review of matters with respect to our Corporate Governance Guidelines and our performance under such guidelines to monitor effectiveness of our corporate governance. The committee members are elected by the board after the annual meeting.

Director Candidate Recommendation Committee

The Director Candidate Recommendation Committee is comprised of all of our outside directors. The chairperson is Jong Soo Yoon. The committee’s duties include (i) authorizing the investigation and composition of a pool of internal and external Representative Director candidates, (ii) examining the Representative Director candidates selected under the examination criteria determined by our board of directors, selecting the Representative Director candidates pursuant to such criteria and reporting to the board of directors the outcome of the examination and (iii) reviewing the qualifications of outside director candidates and proposing nominees to our shareholders for consideration at the general shareholders’ meeting.

Evaluation and Compensation Committee

The Evaluation and Compensation Committee is comprised of four outside directors (Seongcheol Kim, YangHee Choi, Jong Soo Yoon and Seung Ah Theresa Cho). The chairperson is Seongcheol Kim. The committee’s duties include prior review of the Representative Director’s management goals, terms and conditions proposed for inclusion in the management contract of the Representative Director, including, but not limited to, determining whether the Representative Director has achieved the management goals, and the determination of compensation for the Representative Director and the inside directors. The committee members are elected by the board after the closing of the annual meeting.

Related-Party Transactions Committee

The Related-Party Transactions Committee is comprised of four outside directors (Woo-Young Kwak, Yong-Hun Kim, Jong Soo Yoon and Yeong Kyun Ahn). The chairperson is Woo-Young Kwak. This committee’s duties include reviews of transactions between KT Corporation and its subsidiaries and ensures compliance with applicable antitrust laws. The committee members are elected by the board after the annual meeting.

Sustainability Management Committee

The Sustainability Management Committee is comprised of four outside directors (YangHee Choi, Woo-Young Kwak, Jong Soo Yoon and Seongcheol Kim) and one inside director (Chang-Seok Seo). The chairperson is YangHee Choi. The committee’s duties include reviews of sustainable

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management plans, the authorization of establishment of medium-and long-term sustainable management strategies, sustainable management results, regular reporting and risk management of sustainable management activities and charitable contributions. The committee members are elected by the board after the annual meeting.

Audit Committee

Under the Commercial Code of Korea and our articles of incorporation, we are required to establish an audit committee comprised of three or more outside directors and at least two-thirds of the Audit Committee members are required to be outside directors. Audit Committee members must also meet the applicable independence criteria set forth under the rules and regulations of the Sarbanes-Oxley Act of 2002. The committee is comprised of Yeong Kyun Ahn, Yong-Hun Kim, Seong Hoon Lee and Seung Ah Theresa Cho. The chairperson is Yeong Kyun Ahn. Yeong Kyun Ahn serves as the financial expert of the Audit Committee. Members of the committee are elected by our shareholders at the shareholders’ meeting. Our internal and external auditors report directly to the committee.

The duties of the committee include:

• appointing an independent registered public accounting firm;

• approving the appointment and recommending the dismissal of the internal auditor;

• evaluating performance of the independent registered public accounting firm;

• approving services to be provided by the independent registered public accounting firm;

• reviewing annual financial statements;

• reviewing audit results and reports;

• reviewing and evaluating our system of internal controls and policies

• examining improprieties or suspected improprieties; and

• on a quarterly basis, reviewing reports on internal controls for legal compliance, including with respect to cybersecurity laws.

In addition, regarding the shareholders’ meeting, the committee may examine the agenda, financial statement and other reports to be submitted by the board of directors at each shareholders’ meeting.

Item 6.D.  Employees

On a standalone basis, we had 19,737 employees as of December 31, 2023, compared to 20,544 employees as of December 31, 2022 and 21,759 employees as of December 31, 2021.

Labor Relations

We consider our current relations with our work force to be good. However, in the past, we have experienced opposition from our labor union for our strategy of restructuring to improve our efficiency and profitability by disposing of non-core businesses and reducing our employee base.

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As of December 31, 2023, approximately 78.1% of the employees of KT Corporation were members of labor unions. The representative of the labor unions negotiates a collective bargaining agreement with us every two years, and our current collective bargaining agreement expires on October 9, 2025. The current collective bargaining agreement provides that even in the event of a strike, the minimum number of employees necessary to operate the telecommunications business must continue to work.

KT Trade Union also negotiates its members’ wages with us every year. Under the Act of the Promotion of Worker’s Participation and Cooperation, our Employee-Employer Cooperation Committees, which are composed of representatives of management and labor for each business unit and regional office, meet quarterly to discuss employee grievances, working conditions and potential employee-initiated improvements in service or management.

Employee Stock Ownership and Benefits

We operate an employee stock ownership plan (the “ESOP”) with the purpose of enabling our employees to build financial assets, enhancing corporate productivity, and fostering cooperative labor-management relations. Through the ESOP, our employee stock ownership association owned 3.95% of our issued shares as of December 31, 2023.

In accordance with the National Pension Act of Korea, we contribute an amount equal to 4.5% of an employee’s standard monthly wages, and each employee contributes 4.5% of his or her standard monthly wages, into his or her personal pension account. Our employees, including executive officers as well as non-executive employees, are subject to a pension insurance system, under which we make monthly contributions to the pension accounts of the employees, and upon retirement, such employees are paid the pension amount due from their pension accounts. Prior to April 2011, our executive and non-executive employees were subject to a lump-sum severance payment system, under which they were entitled to receive a lump-sum severance payment upon termination of their employment, based on their length of service and salary level at the time of termination. Starting in April 2011, in accordance with the Korean Employee Retirement Income Security Act, we replaced such lump-sum severance payment system with our current pension insurance system in the form of a defined benefit plan, and also introduced a defined contribution plan in December 2012, with a total combined unfunded portion of approximately ￦149 billion as of December 31, 2023. Lump-sum severance amounts previously accrued prior to our adoption of the current pension insurance system continue to remain payable. We also provide a wide range of fringe benefits to our employees, including housing, housing loans, company-provided hospitals and schools, a company-sponsored pension program, an employee welfare fund, industrial disaster insurance, cultural and athletic facilities, physical education grants, meal allowances, medical examinations and training and resort centers. See “Item 5. Operating and Financial Review and Prospects—Item 5.A. Operating Results.”

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Employee Training

The objective of our training program is to develop professionals who are able to create value for our customers. In order to develop skills of our employees, we require approximately 69 hours of training per year from most of our employees, using individually-tailored curriculums based on individual assessments. We also operate a Cyber Academy to provide online classes to our employees, as well as offer various foreign language classes to our employees. In addition, we provide tuition reimbursements to select employees who pursue graduate programs in Korea, as well as provide financial assistance to those who pursue work-related professional licenses or study foreign languages.

Item 6.E.  Share Ownership

Ordinary Shares

The persons who currently serve as our directors or executive officers held, as a group, 293,574 common shares as of April 5, 2024. The table below shows the ownership of our ordinary shares by our directors and executive officers as of April 1, 2024:

Shareholders	Number of Common Shares Owned
Young Shub Kim		5,300
Chang-Seok Seo		15,511
Soo-Jung Shin		14,592
Chang-Yong Ahn		8,815
Hyeon-Seuk Lee		11,659
Choong-Rim Ko		2,446
Kwang-Dong Kim		866
Bong-Gyun Kim		9,196
Young-In Kim		6,798
Young-Ho Kim		8,254
Chae-Hee Kim		9,359
Hoon-Bae Kim		6,459
Hye-Byung Min		7,654
Hyo-Il Park		8,393
Jeong-Hyun Seo		1,452
Jin-Ho Yang		5,071
Kyung-Hwa Ok		9,915
Chang-Ho Yi		9,292
Min Jang		745
Hoon Cho		1,258
Jung-Yong Ji		11,724
Si-Hwan Choi		4,649
Chan-Ki Choi		11,592
Lee-Hwan Kang		36
Gang-Bon Koo		5,249
Jae-Hyung Koo		1,419
Hye-Jin Kwon		3,742
Hee-Keun Kwon		1,075
Mong-Ryong Kim		36
Byung-Kyun Kim		6,317
Young-Geol Kim		735
Yong-Nam Kim		86
Jae-Kwon Kim		7,992
Jun-Ho Kim		4,582
Jee-Hyeon Kim		586
Jin-Chul Kim		986
Hyeong-Rae Roh		262
Je-Hoon Myung		2,125
Sang-Ryong Moon		1,360

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Shareholders	Number of Common Shares Owned
Jung-Ho Park		1,166
Soon-Min Bae		7,474
Ki-Hong Seo		1,023
Won-Je Sung		1,397
Je-Hyun Sung		647
Hoon-Joo Shin		3,211
Tae-Sung Oh		45
Yong-Kyu Yoo		8,031
Byoung-Hyu Yoon		157
Jin-Hyoun Youn		1,418
Mi-Hee Lee		6,131
Byeong-Moo Lee		169
Sang-Ho Lee		932
Seong-Hwan Yi		2,865
Sung-Kyu Lee		147
Young-Jun Lee		1,405
Jung-Woo Lee		265
Jong-Sik Lee		6,676
Bo-Heon Im		1,013
Seung-Hyouk Yim		5,642
Du-Seong Chang		831
Kil-Sung Jung		1,415
Seon-Il Jeong		307
Jae-Wook Jeong		9,632
Seong-Eun Cho		4,480
Young-Sim Jin		3,306
Kang-Rim Choi		6,825
Woo-Hyung Choi		147
Joon-Ki Choi		4,296
Ho-Chang Choi		3,128
Tae-Jun Heo		1,405
Hae-Chon Hong		147
Kyeng-Hee Hwang		253
Total		293,574

Share-based Payments

We have granted share-based payments to our chief executive officer, inside directors, outside directors and executive officers. For details of our share-based payments, see Note 24 of the notes to the Consolidated Financial Statements.

Item 6.F.  Disclosure of a Registrant’s Action to Recover Erroneously Awarded Compensation

Not applicable.

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Item 7.  Major Shareholders and Related Party Transactions

Item 7.A.  Major Shareholders

The following table sets forth certain information relating to the shareholders of our ordinary shares as of December 31, 2023:

Shareholders	Number of Shares		Percent of Total Shares Issued
National Pension Corporation		20,843,859		8.08	%
Shinhan Financial Group Co., Ltd		14,532,028		5.64	%
Silchester International Investors LLP		13,084,358		5.07	%
Hyundai Motor Company		12,251,234		4.75	%
Employee stock ownership association		10,184,803		3.95	%
Hyundai Mobis Co., Ltd.		8,094,466		3.14	%
Director as a group		15,867		0.01	%
Public		167,406,807		64.92	%
KT Corporation (held in the form of treasury stock)		11,447,338		4.44	%
Total issued shares		257,860,760		100.00	%

Major shareholders of our ordinary shares do not have voting rights that are different from those of our public shareholders.

Item 7.B.  Related Party Transactions

We have engaged in various transactions with our subsidiaries and affiliated companies. See Note 35 of the notes to the Consolidated Financial Statements. We have not issued any guarantees in favor of our consolidated subsidiaries.

Item 7.C.  Interests of Experts and Counsel

Not applicable.

Item 8.  Financial Information

Item 8.A.  Consolidated Statements and Other Financial Information

See “Item 18. Financial Statements” and pages F-1 through F-121.

Legal Proceedings

In April 2019, the Korea Fair Trade Commission determined that we, LG U+, SK Broadband and Sejong Telecom colluded in numerous biddings held by public institutions, including the Public Procurement Service and the Korea Racing Authority, between April 2015 to June 2017 for the engagement of telecommunications companies to provide dedicated fixed-line services, in violation of the Monopoly Regulation and Fair Trade Act, and issued an order to cease and desist, imposed a penalty surcharge of ￦5.7 billion on us and filed a criminal complaint against us. In April 2020, several plaintiffs, including the Government and Korea Racing Authority, filed lawsuits alleging damages. There are nine pending lawsuits related to such matters, alleging damages in aggregate of approximately ￦7.25 billion, which remains subject to adjustments. We intend to vigorously defend against such lawsuits.

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In July 2023, the Korea Fair Trade Commission imposed fines on three network service providers, including ￦13.9 billion to us, for unfair advertising related to performance of 5G mobile services. In August 2023, we filed an administrative lawsuit requesting the cancellation of such fine, which proceeding is currently pending at the Seoul High Court.

From April 2021 to December 2023, 562 of our subscribers have filed six class action lawsuits (including one following the July 2023 fine imposed by the Korea Fair Trade Commission, as described above) claiming damages totaling approximately ￦0.6 billion alleging poor service quality of our 5G mobile services. There can be no assurance that such class action lawsuits may not result in additional subscribers making similar claims in the future. There can be no assurance that any loss of such class action lawsuits will not lead to compensation for all of our 5G subscribers, which may lead to significant expenses. We intend to vigorously defend against such class action lawsuits.

In July 2023, seven leading credit card companies in Korea, which have entered into joint marketing arrangements with us, filed a lawsuit against us at the Seoul Central District Court, alleging our unjust enrichment from refund of certain value-added tax to us related to joint marketing activities. We offer discounts to our subscribers who pay their service fees or handset installment payments through certain credit cards issued by the plaintiffs. The plaintiffs claim that the value-added tax refunds of approximately ￦86.2 billion to us, which relate to such discount activities, should be returned to the plaintiffs. We intend to vigorously defend against such lawsuit.

The Korea Fair Trade Commission is currently investigating us and the two other major telecommunications providers for potential violations of the Fair Trade Act, alleging that the companies had conferred in (i) limiting the overall level of mobile service subscribers switching service providers and (ii) setting the range of sales incentives offered to authorized dealers. We plan to cooperate fully with the investigation and are vigorously responding to prove our innocence. However, the Korea Fair Trade Commission, after completion of its investigation, may impose penalties including monetary fines and corrective orders if any violations are found to have occurred, which may adversely affect our business, financial condition and results of operations.

For a description of our additional legal proceedings, see “Item 3. Key Information—Item 3.D. Risk Factors—Legal cases involving our political donations and other incidents and allegations could have a material adverse effect on our business, reputation and stock price.”

As of December 31, 2023, we have established provisions relating to litigation proceedings of ￦30 billion. See Notes 16 and 19 of the notes to the Consolidated Financial Statements.

Dividends

The table below sets out the annual dividends declared on the outstanding ordinary shares to shareholders of record on December 31 of the years indicated and the interim dividends declared on the outstanding ordinary shares to shareholders of record on June 30 of the years indicated:

Year	Annual Dividend per Ordinary Share		Interim Dividend per Ordinary Share		Average Total Dividend per Ordinary Share
	(In Won)		(In Won)		(In Won)
2019		1,100		—		1,100
2020		1,350		—		1,350
2021		1,910		—		1,910
2022		1,960		—		1,960
2023		1,960		—		1,960

If sufficient profits are available, the board of directors may propose annual dividends on the outstanding ordinary shares, which our shareholders must approve by a resolution at the annual

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general meeting of shareholders. This meeting is generally held in March of the following year and if our shareholders at such annual general meeting of shareholders approve the annual dividend, we must pay such dividend within one month following the date of such resolution. Typically, we pay such dividends shortly after the meeting. The declaration of annual dividends is subject to the vote of our shareholders, and consequently, there can be no assurance as to the amount of dividends per ordinary share or that any such dividends will be declared. Interim dividends paid in cash can be declared by a resolution of the board of directors. See “Item 10. Additional Information—Item 10.B. Memorandum and Articles of Association—Dividends” and “Item 12. Description of Securities Other than Equity Securities—Item 12.D. American Depositary Shares.”

The Commercial Code provides that shares of a company of the same class must receive equal treatment. However, major shareholders may consent to receive dividend distributions at a lesser rate than minor shareholders.

Any cash dividends relating to the shares held in the form of ADSs will be paid to the depositary bank in Won. The deposit agreement provides that, except in certain circumstances, cash dividends received by the depositary bank will be converted by the depositary bank into Dollars and distributed to the holders of the ADRs, less withholding tax, other governmental charges and the depositary bank’s fees and expenses. See “Item 12. Description of Securities Other than Equity Securities—Item 12.D. American Depositary Shares.”

Item 8.B.  Significant Changes

Except as disclosed elsewhere in this annual report, we have not experienced any significant changes since the date of our audited consolidated financial statements included in this annual report.

Item 9.  The Offer and Listing

Item 9.A.  Offer and Listing Details

Market Price Information

Ordinary Shares

Our shares were listed on the KRX KOSPI Market on December 23, 1998 under the securities identification code “030200.”

ADSs

The outstanding ADSs, each of which represents one-half of one share of our ordinary share, have been traded on the New York Stock Exchange under the ticker symbol “KT” since May 25, 1999. 

Item 9.B.  Plan of Distribution

Not applicable.

Item 9.C.  Markets

Please refer to “Item 9.A. Offering and Listing Details.”

Item 9.D.  Selling Shareholders

Not applicable.

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Item 9.E.  Dilution

Not applicable.

Item 9.F.  Expenses of the Issuer

Not applicable.

Item 10.  Additional Information

Item 10.A.  Share Capital

Currently, our authorized share capital is 1,000,000,000 shares, which consists of ordinary shares, par value ￦5,000 per share (“Ordinary Shares”) and shares of non-voting preferred stock, par value ￦5,000 per share (“Non-Voting Shares”). Ordinary Shares and Non-Voting Shares together are referred to as “Shares.” Under our articles of incorporation, we are authorized to issue Non-Voting Shares up to one-fourth of our total issued share capital. As of December 31, 2023, 257,860,760 Ordinary Shares were issued, of which 11,447,338 shares were held by the treasury stock fund or us as treasury shares. We have never issued any Non-Voting Shares. All of the issued Ordinary Shares are fully-paid and non-assessable and are in registered form.

Item 10.B.  Memorandum and Articles of Association

Under Article 2 of our articles of incorporation, the primary purpose of KT Corporation is to engage in, including but not limited to, the integrated telecommunications business, the new media and internet multimedia broadcasting business, the development and sale of media contents and software, the sale of telecommunications devices, the testing and inspection of telecommunications equipment, the telemarketing business and financial data services. This section provides information relating to our share capital, including brief summaries of material provisions of our articles of incorporation, the FSCMA, the Commercial Code and related laws of Korea, all as currently in effect. The following summaries are subject to, and are qualified in their entirety by reference to, our articles of incorporation and the applicable provisions of the FSCMA and the Commercial Code. We have filed a copy of our articles of incorporation as an exhibit to registration statements under the Securities Act or annual reports under the Securities Exchange Act previously filed by us.

Directors

According to the Commercial Code of Korea, a director is prohibited from voting on a proposal, arrangement or contract in which the director has an interest. Director compensation is determined based on the standards and methods of compensation as determined by the board of directors and reviewed by the Compensation Committee and approved by the board of directors in accordance with our articles of incorporation. See “Item 6.B. Compensation—Compensation of Directors.” Directors appointed at the general shareholders meeting may not be beneficiaries nor participants of the employee welfare fund, which includes borrowings. There is no explicit age limit relating to a director’s retirement or non-retirement, and there is no number of shares required for purposes of determining a director’s qualifications.

Dividends

We distribute dividends to our shareholders in proportion to the number of shares owned by each shareholder. No dividends are distributed with respect to shares held by us or our treasury stock fund. The Ordinary Shares represented by the ADSs have the same dividend rights as other outstanding Ordinary Shares.

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Holders of Non-Voting Shares are entitled to receive dividends in priority to the holders of Ordinary Shares in an amount of not less than 9% of the par value of the Non-Voting Shares as determined by the board of directors at the time of their issuance, provided that if the dividends on the Ordinary Shares exceed those on the Non-Voting Shares, the Non-Voting Shares will also participate in the distribution of such excess dividend amount in the same proportion as the Ordinary Shares. If the amount available for dividends is less than the aggregate amount of such minimum dividend, the holders of Non-Voting Shares will be entitled to receive such accumulated unpaid dividend in priority to the holders of Ordinary Shares from the dividends payable in respect of the next fiscal year.

We declare dividends annually at the annual general meeting of shareholders which is held within three months after December 31 of each year. We pay the annual dividend shortly after the annual general meeting to the shareholders of record as December 31 of the preceding year. We may distribute the annual dividend in cash or in Shares. However, a dividend of Shares must be distributed at par value. If the market price of the Shares is less than their par value, dividends in Shares may not exceed one-half of the annual dividend. We may, by a resolution of the board of directors, pay quarterly dividends in cash to shareholders or registered pledgees who hold the Shares at the end of March, June or September, as applicable. We have no obligation to pay any annual dividend unclaimed for five years from the payment date.

Under the Commercial Code, we may pay our dividend only out of the excess of our net assets, on a non-consolidated basis, over the sum of (1) our stated capital and (2) the total amount of our capital surplus reserve and earned surplus reserve (the “Legal Reserve”) accumulated up to the end of the relevant dividend period. In addition, we may not pay any dividend unless we have set aside as earned surplus reserve an amount equal to at least 10% of the cash portion of the dividend or unless we have accumulated an earned surplus reserve of not less than one-half of our stated capital. We may not use the Legal Reserve to pay cash dividends but may transfer amounts from the Legal Reserve to share capital or use the Legal Reserve to reduce an accumulated deficit.

Distribution of Free Shares

In addition to paying dividends in Shares out of our retained or current earnings, we may also distribute to our shareholders an amount transferred from the Legal Reserve to our stated capital in the form of free shares. We must distribute such free shares to all our shareholders in proportion to their existing shareholdings.

Preemptive Rights and Issuance of Additional Shares

We may issue authorized but unissued shares at times and, unless otherwise provided in the Commercial Code, on terms our board of directors may determine. Subject to the limitation described in “Limitation on Shareholdings” below, all our shareholders are generally entitled to subscribe for any newly issued Shares in proportion to their existing shareholdings. We must offer new Shares on uniform terms to all shareholders who have preemptive rights and are listed on our shareholders’ register as of the relevant record date. Under the Commercial Code, we may vary, without shareholders’ approval, the terms of these preemptive rights for different classes of shares. We must give notice to all persons who are entitled to exercise preemptive rights regarding new Shares and their transferability at least two weeks before the relevant record date. Our board of directors may determine how to distribute Shares for which preemptive rights have not been exercised or where fractions of Shares occur.

Under the Commercial Code, it is required that the new Shares, convertible bonds or bonds with warrants be issued to persons other than the existing shareholders solely for the purpose of achieving managerial objectives. Under our articles of incorporation, we may issue new Shares

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pursuant to a board resolution to persons other than existing shareholders, who in these circumstances will not have preemptive rights, if the new Shares are:

• publicly offered pursuant to Articles 4 and 119 of the FSCMA;

• issued to members of our employee stock ownership association;

• represented by depositary receipts;

• issued upon exercise of stock options granted to our officers and employees;

• issued through an offering to public investors pursuant to Article 165-6 of the FSCMA, the amount of which is no more than 10% of the issued Shares;

• issued in order to satisfy specific needs such as strategic alliance, inducement of foreign funds or new technology, improvement of financial structure or other capital raising requirement; or

• issued to domestic or foreign financial institutions when necessary for raising funds in emergency cases.

In addition, we may issue convertible bonds or bonds with warrants, each up to an aggregate principal amount of ￦2,000 billion, to persons other than existing shareholders in the situations described above.

Members of our employee stock ownership association, whether or not they are our shareholders, generally have a preemptive right to subscribe for up to 20.0% of the Shares publicly offered pursuant to the FSCMA. This right is exercisable only to the extent that the total number of Shares so acquired and held by members of our employee stock ownership association does not then exceed 20.0% of the total number of Shares then issued (including in such total both: (i) all issued and outstanding Shares at the time the preemptive rights are exercised; and (ii) all Shares to be newly issued in the applicable share issuance transaction in connection with which such preemptive rights are exercised). As of December 31, 2023, 3.95% of the issued Shares were held by members of our employee stock ownership association.

Limitations on Shareholding

The Telecommunications Business Act permits maximum aggregate foreign shareholding in us to be 49.0% of our total issued and outstanding Shares with voting rights (including equivalent securities with voting rights, e.g., depositary certificates and certain other equity interests). For the purposes of the foregoing, a shareholder is a “foreign shareholder” if such shareholder is: (1) a foreign person; (2) a foreign government; or (3) a company whose largest shareholder is a foreign person (including any “specially related persons” as determined under the FSCMA) or a foreign government, in circumstances where (i) such foreign person or foreign government holds, in aggregate, 15.0% or more of such company’s total voting shares, and (ii) such company holds at least 1.0% of our total issued and outstanding Shares with voting rights. For the avoidance of doubt, both of conditions (i) and (ii) in the foregoing item (3) must exist for such a company to be counted as a “foreign shareholder” for the purposes of calculating whether the 49.0% foreign shareholding threshold is reached under the Telecommunications Business Act. In addition, the Telecommunications Business Act prohibits a foreign shareholder from being our largest shareholder if such shareholder owns 5.0% or more of our Shares with voting rights. For the purposes of this restriction, any two or more foreign persons or foreign governments who enter into an agreement to act in concert in the exercise of their voting rights

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will be counted together and prohibited from becoming our largest shareholder in the event that they collectively hold 5.0% or more of our Shares. For the purposes of this restriction under the Foreign Investment Promotion Act, a “foreign shareholder” is defined in the same manner as described above with respect to the foreign shareholding restriction under the Telecommunications Business Act, provided, however, that no exception is made under the Foreign Investment Promotion Act regulations for companies that own less than 1.0% of our Shares (see item (3)(ii) above in this paragraph). A foreigner who has acquired the Shares in excess of such ceiling described above may not exercise its voting rights for shares in excess of such limitation, and the MSIT may require corrective measures to comply with the ownership restrictions.

General Meeting of Shareholders

We hold the annual general meeting of shareholders within three months after December 31 of each year. Subject to a board resolution or court approval, we may hold an extraordinary general meeting of shareholders:

• as necessary;

• at the request of shareholders of an aggregate of 3.0% or more of our issued Ordinary Shares;

• at the request of shareholders holding an aggregate of 1.5% or more of our issued Shares for at least six months; or

• at the request of our Audit Committee.

We must give shareholders written notice setting out the date, place and agenda of the meeting at least two weeks before the date of the general meeting of shareholders. However, for holders of less than 1.0% of the total number of issued and outstanding Ordinary Shares, we may give notice by placing at least two public notices in at least two daily newspapers at least two weeks in advance of the meeting. Currently, we use Seoul Shinmun, Maeil Business Newspaper and The Korea Economic Daily published in Seoul for this purpose. Shareholders not on the shareholders’ register as of the record date are not entitled to receive notice of the general meeting of shareholders or attend or vote at the meeting. Holders of Non-Voting Shares are not entitled to receive notice of general meetings of shareholders, but may attend such meetings.

Our general meetings of shareholders are held at our office in Seoul, or if necessary, may be held elsewhere.

Voting Rights

Holders of our Ordinary Shares are entitled to one vote for each Ordinary Share, except that voting rights of Ordinary Shares held by us, or by a corporate shareholder that is more than 10.0% owned by us either directly or indirectly, may not be exercised. The Commercial Code permits cumulative voting, under which voting method each shareholder has multiple voting rights corresponding to the number of directors to be appointed in the voting and may exercise all voting rights cumulatively to elect one director. Our articles of incorporation permit cumulative voting at our shareholders’ meeting. Under the Commercial Code of Korea, any shareholder holding shares equivalent to not less than 1/100 of the total number of shares issued may apply to us for selecting and appointing such directors by cumulative voting.

Our shareholders may adopt resolutions at a general meeting by an affirmative majority vote of the voting shares present or represented at the meeting, where the affirmative votes also represent at

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least one-fourth of our total voting shares then outstanding, except that where voting rights can be exercised electronically, members of the Audit Committee may be elected by an affirmative majority vote of the voting shares present at the meeting. In addition, under the Commercial Code and our articles of incorporation, the following matters, among others, require approval by the holders of at least two-thirds of the voting shares present or represented at a meeting, where the affirmative votes also represent at least one-third of our total voting shares then outstanding:

• amending our articles of incorporation;

• removing a director;

• reduction of our share capital;

• effecting any dissolution, merger or consolidation of us;

• transferring the whole or any significant part of our business;

• effecting our acquisition of all of the business of any other company or our acquisition of a part of the business of any other company which will significantly affect our business; or

• issuing any new Shares at a price lower than their par value.

In general, holders of Non-Voting Shares are not entitled to vote on any resolution or receive notice of any general meeting of shareholders. However, in the case of amendments to our articles of incorporation, any merger or consolidation of us, or in some other cases that affect the rights or interests of the Non-Voting Shares, approval of the holders of Non-Voting Shares is required. We may obtain such approval by a resolution of holders of at least two-thirds of the Non-Voting Shares present or represented at a class meeting of the holders of Non-Voting Shares, where the affirmative votes also represent at least one-third of our total outstanding Non-Voting Shares.

Shareholders may exercise their voting rights by proxy. The proxy must present a document evidencing an appropriate power of attorney prior to the start of the general meeting of shareholders. Additionally, shareholders may exercise their voting rights in absentia by submission of signed write-in voting forms. To make it possible for our shareholders to proceed with voting on a write-in basis, we are required to attach the appropriate write-in voting form and related informational material to the notices distributed to shareholders for convening the relevant general meeting of shareholders. Any of our shareholders who desire to vote on such write-in basis must submit their completed and signed write-in voting forms to us no later than one day prior to the date that the relevant general meeting of shareholders is convened.

Holders of ADRs exercise their voting rights through the ADR depositary, an agent of which is the record holder of the underlying Ordinary Shares. Subject to the provisions of the deposit agreement, ADR holders are entitled to instruct the ADR depositary how to vote the Ordinary Shares underlying their ADSs.

Appraisal Rights of Dissenting Shareholders

In some limited circumstances, including the transfer of the whole or any significant part of our business and our merger or consolidation with another company, dissenting shareholders have the right to require us to purchase their Shares. To exercise this right, shareholders must submit to us a written notice of their intention to dissent before the general meeting of shareholders. Within 20 days after the relevant resolution is passed at a meeting, the dissenting shareholders must request us in

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writing to purchase their Shares. We are obligated to purchase the Shares of dissenting shareholders within one month after the expiration of the 20-day period. The purchase price for the Shares is required to be determined through negotiation between the dissenting shareholders and us. If we cannot agree on a price through negotiation, the purchase price will be the average of (1) the weighted average of the daily Share prices on the KRX KOSPI Market for the two-month period before the date of the adoption of the relevant board resolution, (2) the weighted average of the daily Share price on the KRX KOSPI Market for the one month period before the date of the adoption of the relevant board resolution and (3) the weighted average of the daily Share price on the KRX KOSPI Market for the one week period before the date of the adoption of the relevant board resolution. However, if we or any of the dissenting shareholders do not accept the purchase price calculated using the above method, the rejecting party may request the court to determine the purchase price. Holders of ADSs will not be able to exercise appraisal rights unless they have withdrawn the underlying ordinary shares and become our direct shareholders.

Register of Shareholders and Record Dates

Our account management institution, Kookmin Bank, maintains the electronic register of our shareholders at its office in Seoul, Korea. Our account management institution effects transfers of Shares on the electronic register of shareholders only upon the electronic registration of such transfers pursuant to the Act on Electronic Registration of Stocks, Bonds, Etc. of Korea (the “Electronic Registration Act”).

The record date is December 31. Further, we may set a record date for the purpose of determining the shareholders entitled to rights pertaining to the Shares, and we must announce such record date at least two weeks prior to such record date. The trading of Shares and the delivery of share certificates may continue while the register of shareholders is closed.

Annual Reports

At least one week before the annual general meeting of shareholders, we must make our annual report and audited consolidated financial statements available for inspection at our principal office and at all of our branch offices. In addition, copies of annual reports, the audited consolidated financial statements and any resolutions adopted at the general meeting of shareholders will be available to our shareholders.

Under the FSCMA, we must file with the Financial Services Commission and the KRX KOSPI Market (1) an annual report within 90 days after the end of our fiscal year and (2) interim reports with respect to the three month period, six month period and nine month period from the beginning of each fiscal year within 45 calendar days following the end of each period. Copies of these reports are or will be available for public inspection at the Financial Services Commission and the KRX KOSPI Market.

Transfer of Shares

Under the Electronic Registration Act, the transfer of Shares is effected by the electronic registration of such transfers on an electronic registry pursuant to the Electronic Registration Act, under which the electronic registration of stocks, bonds and transfers thereof will be required. To assert shareholders’ rights against us, the transferee must have his name and address registered on our electronic register of shareholders. For this purpose, a shareholder is required to apply for electronic registration of transfer between accounts. The above requirements do not apply to the holders of ADSs.

Under current Korean regulations, Korean securities companies and banks, including licensed branches of non-Korean securities companies and banks, investment management companies, futures

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trading companies, internationally recognized foreign custodians and the Korea Securities Depository may act as agents and provide related services for foreign shareholders. Certain foreign exchange controls and securities regulations apply to the transfer of Shares by non-residents or non-Koreans. See “Item 10. Additional Information—Item 10.D. Exchange Controls.”

Our account management institution is Kookmin Bank, located at 26, Gukjegeumyung-ro 8-gil, Yeongdeungpo-gu, Seoul, Korea.

Acquisition of Shares by Us

Under the Commercial Code, we may acquire our own Shares by (i) purchasing on the KRX KOSPI Market, or (ii) purchasing from shareholders on a pro rata basis in accordance with the number of shares held by each shareholder. The aggregate purchase price for the Shares may not exceed the total amount available for distribution of dividends at the end of the preceding fiscal year. Moreover, we must acquire our own Shares from dissenting shareholders who exercise their appraisal rights.

Under the FSCMA, we may acquire Shares only by (i) purchasing on the KRX KOSPI Market, (ii) purchasing from shareholders on a pro rata basis in accordance with the number of shares held by each shareholder, or (iii) receiving Shares returned to us upon the cancellation or termination of a trust agreement with a trustee who acquired the Shares by either of the methods indicated above. The aggregate purchase price for the Shares may not exceed the total amount available for distribution of dividends at the end of the preceding fiscal year.

Under our articles of incorporation, we are required to report the purpose of holding our own Shares and plans for disposition at each annual general meeting of shareholders. We are also required to obtain approval at the annual general meeting of shareholders if we acquire cross-held shares of another company through a sale or exchange of treasury stock.

In general, corporate entities in which we own a 50.0% or more equity interest may not acquire our Shares.

As of December 31, 2023, there were 11,447,338 treasury shares, including shares held by our treasury stock fund.

Liquidation Rights

In the event of our liquidation, after payment of all debts, liquidation expenses and taxes, our remaining assets will be distributed among shareholders in proportion to their shareholdings. Holders of Non-Voting Shares have no preference in liquidation.

Item 10.C.  Material Contracts

None.

Item 10.D.  Exchange Controls

General 

The Foreign Exchange Transaction Act and the Presidential Decree and regulations under that Act and Decree (collectively the “Foreign Exchange Transaction Laws”) regulate investment in Korean securities by non-residents and issuance of securities outside Korea by Korean companies. Under the Foreign Exchange Transaction Laws, non-residents may invest in Korean securities only in compliance

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with the provisions of, and to the extent specifically allowed by, these laws or otherwise permitted by the MOEF. The Financial Services Commission has also adopted, pursuant to its authority under the FSCMA, regulations that control investment by foreigners in Korean securities and regulate the issuance of securities outside Korea by Korean companies.

Under the Foreign Exchange Transaction Laws, if the Government deems that certain emergency circumstances, including, but not limited to, the outbreak of natural calamities, wars or grave and sudden changes in domestic or foreign economies, are likely to occur, the MOEF may temporarily suspend the transactions where Foreign Exchange Transaction Laws are applicable, or impose an obligation to deposit or sell capital to certain Korean governmental agencies or financial institutions. In addition, if the Government deems that it is confronted or is likely to be confronted with serious difficulty in movement of capital between Korea and abroad which will bring serious obstacles in carrying out its currency policies, exchange rate policies and other macroeconomic policies, the MOEF may take measures to require any person who performs transactions to deposit such capital to certain Korean governmental agencies or financial institutions.

Government Review of Issuance of ADSs

In order for us to issue shares represented by ADSs, we are required to file a prior report of the issuance with the MOEF if our securities and borrowings denominated in foreign currencies issued during the one-year period preceding such filing date exceed US$30 million in aggregate. No further Korean governmental approval is necessary for the initial offering and issuance of the ADSs.

Under current Korean laws and regulations, the depositary bank is required to obtain our prior consent for the number of shares to be deposited in any given proposed deposit which exceeds the difference between (1) the aggregate number of shares deposited by us or with the consent of us for the issuance of ADSs (including deposits in connection with the initial and all subsequent offerings of ADSs and stock dividends or other distributions related to these ADSs) and (2) the number of shares on deposit with the depositary bank at the time of such proposed deposit. We can give no assurance that we would grant our consent, if our consent is required. Therefore, a holder of ADRs who surrenders ADRs and withdraws shares may not be permitted subsequently to deposit those shares and obtain ADRs.

Reporting Requirements for Holders of Substantial Interests

Any person whose direct or beneficial ownership of shares, whether in the form of shares or ADSs, certificates representing the rights to subscribe for Shares and equity-related debt securities including convertible bonds and bonds with warrants (collectively, the “Equity Securities”) together with the Equity Securities beneficially owned by certain related persons or by any person acting in concert with the person accounts for 5.0% or more of the total issued Equity Securities is required to report the status of the holdings to the Financial Services Commission and the KRX KOSPI Market within five business days after reaching the 5.0% ownership interest. In addition, any change in the ownership interest subsequent to the report which equals or exceeds 1.0% of the total issued Equity Securities is required to be reported to the Financial Services Commission and the KRX KOSPI Market within five business days from the date of the change. The required information to be included in the 5.0% report may be different if the acquisition of such shareholding interest is for the purpose of exercising influence over the management, as opposed to an acquisition for investment purposes. Any person reporting the holding of 5.0% or more of the total issued Equity Securities and any person reporting the change in the ownership interest which equals or exceeds 1.0% of the total issued Equity Securities pursuant to the requirements described above must also deliver a copy of such reports to us.

Violation of these reporting requirements may subject a person to criminal sanctions such as fines or imprisonment and may result in a loss of voting rights with respect to the unreported ownership

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of Equity Securities exceeding 5.0%. Furthermore, the Financial Services Commission may issue an order to dispose of non-reported Equity Securities.

Restrictions Applicable to ADSs

No Korean governmental approval is necessary for the sale and purchase of ADSs in the secondary market outside Korea or for the withdrawal of shares underlying ADSs and the delivery inside Korea of shares in connection with the withdrawal, provided that a foreigner who intends to acquire the shares must obtain an investment registration certificate from the Financial Supervisory Service as described below. In general, the acquisition of the shares by a foreigner must be reported by the foreigner or his standing proxy in Korea immediately to the Governor of the Financial Supervisory Service; provided, however, that in cases where a foreigner acquires shares through the exercise of rights as a holder of ADSs (or other depositary certificates), the foreigner must cause such report to the Governor of the Financial Supervisory Service to be filed by the Korea Securities Depository.

Persons who have acquired shares as a result of the withdrawal of shares underlying the ADSs may exercise their preemptive rights for new shares, participate in free distributions and receive dividends on shares without any further governmental approval.

Restrictions Applicable to Shares

As a result of amendments to the Foreign Exchange Transaction Laws and Financial Services Commission regulations adopted in connection with the stock market opening from January 1992, which we refer to collectively as the Investment Rules, foreigners may invest, with limited exceptions and subject to procedural requirements, in all shares of Korean companies, whether listed on the KRX KOSPI Market or the KRX KOSDAQ Market, unless prohibited by specific laws. Foreign investors may trade shares listed on the KRX KOSPI Market or the KRX KOSDAQ Market only through the KRX KOSPI Market or the KRX KOSDAQ Market, except in limited circumstances, including:

• odd-lot trading of shares;

• acquisition of shares (“Converted Shares”) by exercise of warrant, conversion right under convertible bonds or withdrawal right under depositary receipts issued outside of Korea by a Korean company;

• acquisition of shares as a result of inheritance, donation, bequest or exercise of shareholders’ rights, including preemptive rights or rights to participate in free distributions and receive dividends;

• over-the-counter transactions between foreigners of a class of shares for which the ceiling on aggregate acquisition by foreigners, as explained below, has been reached or exceeded;

• shares acquired by foreign direct investment as defined in the Foreign Investment Promotion Act;

• disposal of shares pursuant to the exercise of appraisal rights of dissenting shareholders;

• disposal of shares in connection with a tender offer;

• acquisition of shares by a foreign depositary in connection with the issuance of depositary receipts;

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• acquisition and disposal of shares through overseas stock exchange market if such shares are simultaneously listed on the KRX KOSPI Market or the KRX KOSDAQ Market and such overseas stock exchange;

• acquisition and disposal of shares through alternative trading systems (ATS);

• arm’s length transactions between foreigners, if all of such foreigners belong to an investment group managed by the same person.

For over-the-counter transactions of shares between foreigners outside the KRX KOSPI Market or the KRX KOSDAQ Market for shares with respect to which the limit on aggregate foreign ownership has been reached or exceeded, an investment broker licensed in Korea must act as an intermediary. Odd-lot trading of shares outside the KRX KOSPI Market or the KRX KOSDAQ Market must involve a licensed investment trader in Korea as the other party. Foreign investors are prohibited from engaging in margin transactions through borrowing shares from a securities company with respect to shares which are subject to a foreign ownership limit.

Pursuant to amendments to the Investment Rules that became effective on December 14, 2023, foreign investors who wish to invest in shares on the KRX KOSPI Market or the KRX KOSDAQ Market (including Converted Shares) may do so using their Legal Entity Identifier, instead of having to register their identity with the Financial Supervisory Service prior to making any such investment. However, those who have already registered as a foreign investor may continue to make investments using their investment registration card.

Upon a foreign investor’s purchase of shares through the KRX KOSPI Market or the KRX KOSDAQ Market, no separate report by the investor is required because the investment registration certificate system is designed to control and oversee foreign investment through a computer system. However, a foreign investor’s acquisition or sale of shares outside the KRX KOSPI Market or the KRX KOSDAQ Market (as discussed above) must be reported by the foreign investor or his standing proxy to the Governor of the Financial Supervisory Service at the time of each such acquisition or sale; provided, however, that in cases where a foreigner acquires shares through the exercise of rights as a holder of ADSs (or other depositary certificates), the foreigner must cause such report to the Governor of the Financial Supervisory Service to be filed by the Korea Securities Depository; and further provided that a foreign investor must ensure that any acquisition or sale by it of shares outside the KRX KOSPI Market or the KRX KOSDAQ Market in the case of trades in connection with a tender offer, odd-lot trading of shares or trades of a class of shares for which the aggregate foreign ownership limit has been reached or exceeded, is reported to the Governor of the Financial Supervisory Service by the investment trader, the investment broker, the Korea Securities Depository or the financial securities company engaged to facilitate such transaction. A foreign investor may appoint one or more standing proxies from among the Korea Securities Depository, foreign exchange banks, including domestic branches of foreign banks, investment traders, investment brokers, the Korea Securities Depository, financial securities companies and internationally recognized custodians that satisfy all relevant requirements under the FSCMA.

Certificates evidencing shares of Korean companies must be kept in custody with an eligible custodian in Korea. Only the Korea Securities Depository, foreign exchange banks including domestic branches of foreign banks, investment traders, investment brokers, collective investment business entities and internationally recognized custodians satisfying the relevant requirements under the FSCMA are eligible to act as a custodian of shares for a non-resident or foreign investor. A foreign investor must ensure that his custodian deposits its shares with the Korea Securities Depository. However, a foreign investor may be exempted from complying with this deposit requirement with the approval of the Governor of the Financial Supervisory Service in circumstances where compliance with

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that requirement is made impracticable, including cases where compliance would contravene the laws of the home country of such foreign investor.

Under the Investment Rules, with certain exceptions, foreign investors may acquire shares of a Korean company without being subject to any foreign investment ceiling. As one such exception, designated public corporations are subject to a 40.0% ceiling on the acquisition of shares by foreigners in the aggregate and a ceiling on the acquisition of shares by a single foreign investor pursuant to the articles of incorporation of such corporation. Currently, Korea Electric Power Corporation is the only designated public corporation which has set such a ceiling. Furthermore, an investment by a foreign investor of not less than 10.0% of the issued shares with voting rights of a Korean company is defined as a direct foreign investment under the Foreign Investment Promotion Act, which is, in general, subject to the report to, and acceptance, by the Ministry of Trade Industry & Energy. The acquisition of shares of a Korean company by a foreign investor may also be subject to certain foreign shareholding restrictions in the event that the restrictions are prescribed in each specific law which regulates the business of the Korean company. A foreigner who has acquired our ordinary shares in excess of this ceiling may not exercise his voting rights with respect to our ordinary shares exceeding the limit.

Under the Foreign Exchange Transaction Laws, a foreign investor who intends to acquire shares must designate a foreign exchange bank at which he must open a foreign currency account and a Won account exclusively for stock investments. No approval is required for remittance into Korea and deposit of foreign currency funds in the foreign currency account. Foreign currency funds may be transferred from the foreign currency account at the time required to place a deposit for, or settle the purchase price of, a stock purchase transaction to a Won account opened at an investment broker or an investment trader. Funds in the foreign currency account may be remitted abroad without any governmental approval.

Dividends on Shares are paid in Won. No governmental approval is required for foreign investors to receive dividends on, or the Won proceeds of the sale of, any shares to be paid, received and retained in Korea. Dividends paid on, and the Won proceeds of the sale of, any shares held by a non-resident of Korea must be deposited either in a Won account with the investor’s investment broker or investment trader or his Won Account. Funds in the investor’s Won Account may be transferred to his foreign currency account or withdrawn for local living expenses up to certain limitations. Funds in the Won Account may also be used for future investment in shares or for payment of the subscription price of new shares obtained through the exercise of preemptive rights.

Investment brokers and investment traders are allowed to open foreign currency accounts with foreign exchange banks exclusively for accommodating foreign investors’ stock investments in Korea. Through these accounts, these investment brokers and investment traders may enter into foreign exchange transactions on a limited basis, such as conversion of foreign currency funds and Won funds, either as a counterparty to or on behalf of foreign investors, without the investors having to open their own accounts with foreign exchange banks.

Item 10.E.  Taxation

The following summary is based upon tax laws of the United States and the Republic of Korea as in effect on the date of this annual report on Form 20-F, and is subject to any change in United States or Korean law that may come into effect after such date. Investors in the ordinary shares or ADSs are advised to consult their own tax advisers as to the United States, Korean or other tax consequences of the purchase, ownership and disposition of such securities, including the effect of any national, state or local tax laws.

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Korean Taxation

The following summary of Korean tax considerations applies to you as long as you are not:

• a resident of Korea;

• a corporation organized under Korean law; or

• engaged in a trade or business in Korea through a permanent establishment or a fixed base.

Shares or ADSs

Dividends on Ordinary Shares or ADSs

Unless an applicable tax treaty provides otherwise, we will deduct Korean withholding tax from dividends paid to you either in cash or shares at a rate of 22.0% (including local income tax). If you are a resident of a country that has entered into a tax treaty with Korea, you may qualify for a reduced rate of Korean withholding tax under such a treaty. For example, if you are a qualified resident of the United States for purposes of the US-Korea Tax Treaty (the “Treaty”) and you are the beneficial owner of a dividend, a reduced withholding tax rate of 16.5% (including local income tax) generally will apply. You will not be entitled to claim treaty benefits if you are not the beneficial owner of a dividend.

In order to obtain the benefits of a reduced withholding tax rate under a tax treaty, you must submit to us, prior to the dividend payment date, an application for entitlement to a reduced tax rate. If you hold ADSs and receive the dividends through a depositary, you are not required to submit the application for entitlement to a reduced tax rate. If you are an overseas investment vehicle (an “OIV”), which is defined as an organization established in a non-Korean jurisdiction that manages funds collected through investment solicitation by way of acquiring, disposing, or otherwise investing in any such assets and distributes the yield therefrom to investors, you must submit to us a report of the OIV and a schedule of beneficial owners together with their applications for entitlement to a reduced tax rate, which you should collect from each beneficial owner. Excess taxes withheld may be recoverable if you subsequently produce satisfactory evidence that you were entitled to have tax withheld at a lower rate.

If we distribute to you free shares representing a transfer of certain capital reserves or asset revaluation reserves into paid-in capital, that distribution may be a deemed dividend subject to Korean tax.

Capital Gains

Capital gains from a sale of ordinary shares will generally be exempt from Korean taxation if you have owned, together with certain related parties, less than 25.0% of our total issued shares during the year of sale and the five calendar years before the year of sale, and the sale is made through the KRX KOSPI Market, and you have no permanent establishment in Korea. Capital gains earned by a non-Korean holder from a sale of ADSs outside of Korea are exempt from Korean taxation by virtue of the Special Tax Treatment Control Law of Korea (the “STTCL”), provided that the issuance of the ADSs is deemed to be an overseas issuance under the STTCL.

If you are subject to Korean taxation on capital gains from a sale of ADSs, or ordinary shares that you acquired as a result of a withdrawal, your gain will be calculated based on your cost of acquiring the ADSs representing the ordinary shares, although there are no specific Korean tax

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provisions or rulings on this issue. In the absence of the application of a tax treaty that exempts tax on capital gains, the amount of Korean tax imposed on such capital gains will be the lesser of 11.0% (including local income tax) of the gross realization proceeds or, subject to the production of satisfactory evidence of the acquisition cost and the transaction costs of the ADSs, 22.0% (including local income tax) of the net capital gain.

If you are subject to Korean taxation on capital gains from a sale of ADSs, or ordinary shares that you acquire as a result of a withdrawal, and you sell your ordinary shares or ADSs, the purchaser or, in the case of a sale of ordinary shares on the KRX KOSPI Market or through a licensed securities company in Korea, the licensed securities company, is required to withhold Korean tax from the sales price in an amount equal to 11% (including local income tax) of the gross realization proceeds and to make payment thereof to the Korean tax authorities, unless you establish your entitlement to an exemption from taxation under an applicable tax treaty or produce satisfactory evidence of your acquisition cost and the transaction costs for the ordinary shares or ADSs. In order to obtain the benefit of an exemption from tax pursuant to a tax treaty, you must submit to the purchaser or the securities company (or through the depositary), as the case may be, prior to the first payment, an exemption application, together with a certificate of your tax residence issued by a competent authority of your residence country, provided that if such tax exemption is being sought to be applied to an amount that is ￦1 billion or more (including where the aggregate amount exempted within one year from the last day of the month in which the payment was made, is ￦1 billion or more), in addition to the certificate of your tax residence issued by a competent authority of your residence country, you will also be required to submit the names and addresses of all of the members of your board of directors, the identities and shareholding percentages of all of your shareholders (provided that if you have more than 100 shareholders, you may instead provide a statement showing the total number of shareholders and aggregate investment amount from each country), and audit reports for the most recent three years (or, if your entity has been in existence for less than three years, audit reports since incorporation). If you are an OIV, you must submit a report of the OIV and a schedule of beneficial owners together with their applications for exemption, which you should collect from each beneficial owner. The withholding obligor must submit the application and the report to the relevant tax office by the ninth day of the month following the date of the first payment of such income. This requirement will not apply to exemptions under Korean tax law. Excess taxes withheld may be recoverable if you subsequently produce satisfactory evidence that you were entitled to have taxes withheld at a lower rate.

Most tax treaties that Korea has entered into provide exemptions for capital gains tax for capital gains from sale of ordinary shares. However, Korea’s tax treaties with Japan, Austria, Spain and a few other countries do not provide an exemption from such capital gains tax. For example, Article 13 of Korea’s tax treaty with Japan provides that if a taxpayer holding 25% or more (including those shares held by any related party of the taxpayer) of total issued shares of a company in a taxable year sells 5% or more (including those sold by any related party of the taxpayer) of total issued shares of the same company in the same taxable year, the country where the company is a resident may impose tax on such taxpayer.

Inheritance Tax and Gift Tax

Korean inheritance tax is imposed upon (a) all assets (wherever located) of the deceased if at the time of his death he was domiciled in Korea or had resided in Korea for at least 183 days immediately prior to his death and (b) all property located in Korea which passes on death (irrespective of the domicile of the deceased). Gift tax is imposed in similar circumstances to the above. Taxes are currently imposed at the rate of 10% to 50% if the value of the relevant property is above a certain limit and vary according to the identity of the parties involved.

Under Korean Inheritance and Gift Tax Law, shares issued by a Korean corporation are deemed located in Korea irrespective of where they are physically located or by whom they are owned.

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It remains unclear whether, for Korean inheritance and gift tax purposes, a non-resident holder of ADSs will be treated as the owner of the shares underlying the ADSs. If such non-resident is treated as the owner of the shares, the heir or donee of such non-resident (or in certain circumstances, the non-resident as the donor) will be subject to Korean inheritance or gift tax at the same rate as described above.

Securities Transaction Tax

If you transfer ordinary shares on the KRX KOSPI Market, you will be subject to securities transaction tax at a rate of 0.05% for any transfers made during 2023, 0.03% for any transfers made during 2024 and an agriculture and fishery special tax at a rate of 0.15%, calculated based on the sales price of the shares. If you transfer ordinary shares on the KRX KOSDAQ Market, you will be subject to securities transaction tax at a rate of 0.02% for any transfers made during 2023, 0.018% for any transfers made during 2024 and will generally not be subject to the agriculture and fishery special tax. If you transfer ordinary shares and your transfer is not made on the KRX KOSPI or KOSDAQ Market (e.g., shares of private companies), you will generally be subject to the securities transaction tax at a rate of 0.35% for transfers on and after January 1, 2023 and will generally not be subject to the agriculture and fishery special tax.

With respect to transfers of ADSs, a tax ruling issued in 2004 by the Korean tax authority appears to hold that depositary receipts (such as the ADSs) constitute share certificates subject to the securities transaction tax. In May 2007, the Seoul Administrative Court held that depositary receipts do not constitute share certificates subject to the securities transaction tax. In 2008, the Seoul Administrative Court’s holding was upheld by the Seoul High Court and was further upheld by the Supreme Court. Subsequent to this series of rulings, however, the Securities Transaction Tax Law was amended to expressly provide that depositary receipts constituted a form of share certificates subject to the securities transaction tax. However, the sale price of ADSs from a transfer of depositary receipts listed on the New York Stock Exchange, the Nasdaq National Market or other qualified foreign exchanges are exempt from the securities transaction tax.

United States Federal Income Taxation

The following discussion describes the material United States federal income tax consequences of the ownership of our ADSs and ordinary shares as of the date hereof. This discussion deals only with ADSs and ordinary shares that are held as capital assets by a U.S. Holder (as defined below). In addition, the discussion set forth below is applicable only to U.S. Holders (i) who are residents of the United States for purposes of the current Treaty, (ii) whose ADSs or ordinary shares are not, for purposes of the Treaty, effectively connected with a permanent establishment in Korea and (iii) who otherwise qualify for the full benefits of the Treaty.

For purposes of this summary, a “U.S. Holder” is a beneficial owner of our ADSs or ordinary shares that is:

• a citizen or resident of the United States;

• a United States domestic corporation; or

• otherwise is subject to United States federal income taxation on a net income basis in respect of such ADSs or ordinary shares.

This discussion is based upon provisions of the Internal Revenue Code of 1986, as amended (the “Code”), and regulations, rulings and judicial decisions thereunder as of the date hereof, as well as

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the Treaty (as defined above). Those authorities may be changed, perhaps retroactively, so as to result in United States federal income tax consequences different from those summarized below. In addition, this discussion is based, in part, upon representations made by the depositary to us and assumes that the deposit agreement, and all other related agreements, will be performed in accordance with their terms.

This discussion does not represent a detailed description of the United States federal income tax consequences applicable to you if you are subject to special treatment under the United States federal income tax laws, including if you are:

• a dealer in securities or currencies;

• a financial institution;

• a regulated investment company;

• a real estate investment trust;

• an insurance company;

• a tax-exempt organization;

• a person holding our ADSs or ordinary shares as part of a hedging, integrated or conversion transaction, a constructive sale or a straddle;

• a trader in securities that has elected the mark-to-market method of accounting for securities;

• a person liable for alternative minimum tax;

• a person who owns or is deemed to own 10% or more of our stock (by vote or value);

• a partnership or other pass-through entity for United States federal income tax purposes; or

• a person whose “functional currency” is not the United States dollar.

If a partnership (or other entity treated as a partnership for United States federal income tax purposes) holds our ADSs or ordinary shares, the tax treatment of a partner will generally depend upon the status of the partner and the activities of the partnership. If you are a partner of a partnership holding our ADSs or ordinary shares, you should consult your tax advisors.

This discussion does not contain a detailed description of all the United States federal income tax consequences to you in light of your particular circumstances and does not address the estate or gift taxes, the Medicare contribution tax on net investment income or the effects of any state, local or non-United States tax laws. If you are considering the purchase of our ADSs or ordinary shares, you should consult your own tax advisors concerning the particular United States federal income tax consequences to you of the purchase, ownership and disposition of our ADSs or ordinary shares, as well as the consequences to you arising under other United States federal tax laws and the laws of any other taxing jurisdiction.

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ADSs

If you hold ADSs, for United States federal income tax purposes, you generally will be treated as the owner of the underlying ordinary shares that are represented by such ADSs. Accordingly, deposits or withdrawals of ordinary shares for ADSs will not be subject to United States federal income tax. For the remainder of this discussion, references to “ordinary shares” should be interpreted to include ADSs, unless otherwise specified.

Taxation of Dividends

The gross amount of distributions of cash or property with respect to the ordinary shares (including any amounts withheld to reflect Korean withholding taxes) will be taxable as dividends to the extent paid out of our current or accumulated earnings and profits, as determined under United States federal income tax principles. Because we do not expect to determine earnings and profits in accordance with United States federal income tax principles, you should expect that a distribution will generally be treated as a dividend for United States federal income tax purposes.

Any dividends that you receive (including any withheld taxes) will be includable in your gross income as ordinary income on the day actually or constructively received by you, in the case of ordinary shares, or by the depositary, in the case of ADSs. Such dividends will not be eligible for the dividends received deduction allowed to corporations under the Code. With respect to non-corporate United States investors, certain dividends received from a qualified foreign corporation may be subject to preferential rates of taxation. A qualified foreign corporation includes a foreign corporation that is eligible for the benefits of a comprehensive income tax treaty with the United States which the United States Treasury Department determines to be satisfactory for these purposes and which includes an exchange of information provision. The United States Treasury Department has determined that the Treaty meets these requirements, and we believe we are eligible for the benefits of the Treaty.

Non-corporate U.S. Holders will not be eligible for reduced rates of taxation on any dividends received from us if we are a passive foreign investment company in the taxable year in which such dividends are paid or in the preceding taxable year (see “—Passive Foreign Investment Company” below).

The amount of any dividend paid in Won will equal the United States dollar value of the Won received calculated by reference to the exchange rate in effect on the date the dividend is received by you, in the case of ordinary shares, or by the depositary, in the case of ADSs, regardless of whether the Won are converted into United States dollars. If the Won received as a dividend are converted into United States dollars on the date they are received, you generally will not be required to recognize foreign currency gain or loss in respect of the dividend income. If the Won received as a dividend are not converted into United States dollars on the date of receipt, you will have a basis in the Won equal to their United States dollar value on the date of receipt. Any gain or loss realized on a subsequent conversion or other disposition of the Won will be treated as United States source ordinary income or loss.

Subject to generally applicable limitations and conditions, Korean tax on dividends paid at the appropriate rate applicable to the U.S. Holder may be eligible for a credit against such U.S. Holder’s U.S. federal income tax liability. These generally applicable limitations and conditions include new requirements recently adopted by the U.S. Internal Revenue Service (“IRS”) in regulations promulgated in December 2021, and any Korean tax will need to satisfy these requirements in order to be eligible to be a creditable tax for a U.S. Holder. In the case of a U.S. Holder that consistently elects to apply a modified version of these rules under recently issued temporary guidance and complies with specific requirements as set forth in such guidance, the Korean tax on dividends may be treated as meeting the

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new requirements and therefore as a creditable tax. In the case of all other U.S. Holders, the application of these requirements to the Korean tax on dividends is uncertain and we have not determined whether these requirements have been met, including requirements applicable to the Treaty. Dividends paid on the ordinary shares will be treated as income from sources outside the United States and, for U.S. Holders that elect to claim foreign tax credits, will generally constitute passive category income for U.S. foreign tax credit purposes. If the Korean dividend tax is not a creditable tax for a U.S. Holder or the U.S. Holder does not elect to claim a foreign tax credit for any foreign income taxes paid or accrued in the same taxable year, a U.S. Holder may elect to deduct the Korean tax in computing such U.S. Holder’s taxable income for U.S. federal income tax purposes. The rules governing the foreign tax credit and deductions for foreign taxes depend on a U.S. Holder’s particular circumstances and involve the application of complex rules to those circumstances. The temporary guidance discussed above also indicates that the Treasury and the IRS are considering proposing amendments to the December 2021 regulations and that the temporary guidance can be relied upon until additional guidance is issued that withdraws or modifies the temporary guidance. You are urged to consult your tax advisors regarding the availability and calculation of the foreign tax credit under your particular situations.

Passive Foreign Investment Company

Based on the past and projected composition of our income and assets and the valuation of our assets, we do not believe we were a passive foreign investment company (“PFIC”) for our most recent taxable year or in the preceding taxable year and do not expect to become a PFIC in the current taxable year or the foreseeable future, although there can be no assurance in this regard.

In general, we will be a PFIC for any taxable year in which, taking into account our proportionate share of the income and assets of our subsidiaries under applicable “look-through” rules:

• at least 75% of our gross income is passive income, or

• at least 50% of the value (determined based on a quarterly average) of our assets is attributable to assets that produce or are held for the production of passive income.

For this purpose, passive income generally includes dividends, interest, royalties and rents. If we own at least 25% (by value) of the stock of another corporation, for purposes of determining whether we are a PFIC, we will be treated as owning our proportionate share of the other corporation’s assets and receiving our proportionate share of the other corporation’s income.

The determination of whether we are a PFIC is made annually based on the facts and circumstances at the time, some of which may be beyond our control, such as the amount and composition of our income and the valuation and composition of our assets, including goodwill and other intangible assets, as implied by the market price of our ordinary shares. Recent stock market volatility could exacerbate these considerations. Accordingly, we cannot be certain that we will not be a PFIC in the current or any future taxable year. If we are a PFIC for any taxable year during which you hold our ordinary shares, you will be subject to special tax rules discussed below.

If we are a PFIC for any taxable year during which you hold our ordinary shares and you do not make a timely mark-to-market election, as described below, you will be subject to special tax rules with respect to any “excess distribution” received and any gain realized from a sale or other disposition, including a pledge, of ordinary shares. Distributions received in a taxable year will be treated as excess distributions to the extent that they are greater than 125% of the average annual distributions received

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during the shorter of the three preceding taxable years or your holding period for the ordinary shares. Under these special tax rules:

• the excess distribution or gain will be allocated ratably over your holding period for the ordinary shares,

• the amount allocated to the current taxable year, and any taxable year prior to the first taxable year in which we were a PFIC, will be treated as ordinary income, and

• the amount allocated to each other year will be subject to tax at the highest tax rate in effect for that year and the interest charge generally applicable to underpayments of tax will be imposed on the resulting tax attributable to each such year.

Although the determination of whether we are a PFIC is made annually, if we are a PFIC for any taxable year in which you hold our ordinary shares, you will generally be subject to the special tax rules described above for that year and for each subsequent year in which you hold the ordinary shares (even if we do not qualify as a PFIC in such subsequent years). However, if we cease to be a PFIC, you can avoid the continuing impact of the PFIC rules by making a special election to recognize gain as if your ordinary shares had been sold on the last day of the last taxable year during which we were a PFIC. You are urged to consult your own tax advisor about this election.

In lieu of being subject to the special tax rules discussed above, you may make a mark-to-market election with respect to your ordinary shares provided such ordinary shares are treated as “marketable stock.” The ordinary shares generally will be treated as marketable stock if they are regularly traded on a “qualified exchange or other market” (within the meaning of the applicable Treasury regulations).

If you make an effective mark-to-market election, for each taxable year that we are a PFIC you will include as ordinary income the excess of the fair market value of your ordinary shares at the end of the year over your adjusted tax basis in the ordinary shares. You will be entitled to deduct as an ordinary loss in each such year the excess of your adjusted tax basis in the ordinary shares over their fair market value at the end of the year, but only to the extent of the net amount previously included in income as a result of the mark-to-market election. Your adjusted tax basis in the ordinary shares will be increased by the amount of any income inclusion and decreased by the amount of any deductions under the mark-to-market rules. In addition, upon the sale or other disposition of your ordinary shares in a year that we are a PFIC, any gain will be treated as ordinary income and any loss will be treated as ordinary loss, but only to the extent of the net amount of income previously included as a result of the mark-to-market election.

If you make a mark-to-market election, it will be effective for the taxable year for which the election is made and all subsequent taxable years unless the ordinary shares are no longer regularly traded on a qualified exchange or other market, or the IRS consents to the revocation of the election. You are urged to consult your tax advisor about the availability of the mark-to-market election, and whether making the election would be advisable in your particular circumstances.

Alternatively, you can sometimes avoid the special tax rules described above by electing to treat a PFIC as a “qualified electing fund” under Section 1295 of the Code. However, this option is not available to you because we do not intend to comply with the requirements necessary to permit you to make this election.

If we are a PFIC for any taxable year during which you hold our ordinary shares and any of our non-United States subsidiaries is also a PFIC, you will be treated as owning a proportionate amount

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(by value) of the shares of the lower-tier PFIC for purposes of the application of the PFIC rules. You are urged to consult your tax advisors about the application of the PFIC rules to any of our subsidiaries.

You will generally be required to file IRS Form 8621 if you hold our ordinary shares in any year in which we are classified as a PFIC. You are urged to consult your tax advisors concerning the United States federal income tax consequences of holding ordinary shares if we are considered a PFIC in any taxable year.

Taxation of Capital Gains

Subject to the discussion above under “—Passive Foreign Investment Company,” for United States federal income tax purposes, you will recognize taxable gain or loss on any sale, exchange or other taxable disposition of the ordinary shares in an amount equal to the difference between the amount realized for the ordinary shares and your adjusted tax basis in the ordinary shares. Such gain or loss will generally be capital gain or loss and will generally be long-term capital gain or loss if you have held the ordinary shares for more than one year. Long-term capital gains of non-corporate U.S. Holders (including individuals) are eligible for reduced rates of taxation. The deductibility of capital losses is subject to limitations. Any gain or loss recognized by you will generally be treated as United States source gain or loss.

You should note that any Korean securities transaction tax or agriculture and fishery special tax will not be treated as a creditable foreign tax for United States federal income tax purposes, although you may be entitled to deduct such taxes, subject to applicable limitations under the Code. You should consult your own tax advisors regarding the application of the foreign tax credit rules to your investment in, and disposition of, the ordinary shares.

Foreign Financial Asset Reporting

Certain U.S. Holders that own “specified foreign financial assets” with an aggregate value in excess of U.S.$50,000 on the last day of the taxable year or U.S.$75,000 at any time during the taxable year are generally required to file an information statement along with their tax returns, currently on IRS Form 8938, with respect to such assets. “Specified foreign financial assets” include any financial accounts held at a non-United States financial institution, as well as securities issued by a non-United States issuer that are not held in accounts maintained by financial institutions. The understatement of income attributable to “specified foreign financial assets” in excess of U.S.$5,000 extends the statute of limitations with respect to the tax return to six years after the return was filed. U.S. Holders who fail to report the required information could be subject to substantial penalties. You are encouraged to consult with your own tax advisors regarding the possible application of these rules, including the application of the rules to your particular circumstances.

Information Reporting and Backup Withholding

In general, information reporting will apply to dividends in respect of our ordinary shares and the proceeds from the sale, exchange or other disposition of our ordinary shares that are paid to you within the United States (and in certain cases, outside the United States), unless you are an exempt recipient. A backup withholding tax may apply to such payments if you fail to provide a taxpayer identification number or certification of exempt status or fail to report in full dividend and interest income.

Backup withholding is not an additional tax and any amounts withheld under the backup withholding rules will be allowed as a refund or a credit against your United States federal income tax liability provided the required information is timely furnished to the IRS.

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Item 10.F.  Dividends and Paying Agents

See “Item 8. Financial Information—Item 8.A. Consolidated Statements and Other Financial Information—Dividends” for information concerning our dividend policies and our payment of dividends. See “—Item 10.B. Memorandum and Articles of Association—Dividends” for a discussion of the process by which dividends are paid on our ordinary shares. See “Item 12. Description of Securities Other than Equity Securities—Item 12.D. American Depositary Shares” for a discussion of the process by which dividends are paid on our ADSs. The paying agent for payment of our dividends on ADSs in the United States is Citibank, N.A.

Item 10.G.  Statements by Experts

Not applicable.

Item 10.H.  Documents on Display

We are subject to the information requirements of the Exchange Act, and, in accordance therewith, are required to file reports, including annual reports on Form 20-F, and other information with the U.S. Securities and Exchange Commission. These materials, including this annual report and the exhibits thereto, may be inspected and copied at the Commission’s public reference rooms in Washington, D.C. Please call the Commission at 1-800-SEC-0330 for further information on the public reference rooms. We are required to make filings with the Commission by electronic means, which will be available to the public over the Internet at the Commission’s website at http://www.sec.gov.

Item 10.I.  Subsidiary Information

Not applicable.

Item 10.J.  Annual Report to Security Holders

Not applicable.

Item 11.  Quantitative and Qualitative Disclosures About Market Risk

We are exposed to foreign exchange rate and interest rate risks primarily associated with underlying liabilities, and to equity price risk as a result of our investment in equity securities. Our long-term financial policies are annually reported to our Board of Directors, and our finance division conducts financial risk management and assessment. Upon identification and evaluation of our risk exposures, we, having considered various circumstances, enter into derivative financial instruments to try to manage some of such risks. These contracts are entered into with major financial institutions, thereby minimizing the risk of credit loss. The activities of our finance division are subject to policies approved by our foreign exchange and interest rate risk management committee. These policies address the use of derivative financial instruments, including the approval of counterparties, setting of limits and investment of excess liquidity. Our general policy is to hold or issue derivative financial instruments largely for hedging purposes. For details regarding the assets, liabilities, gains and losses recorded relating to our derivative contracts outstanding as of December 31, 2021, 2022, and 2023, see Notes 4 and 7 of the notes to the Consolidated Financial Statements.

Exchange Rate Risk

Most of our cash flow is denominated in Won. We are exposed to foreign exchange risk related to foreign currency denominated liabilities and anticipated foreign exchange payments. Anticipated

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foreign exchange payments, mostly in U.S. Dollars, relate primarily to payments of foreign currency denominated debt, net settlements paid to foreign telecommunication carriers and payments for equipment purchased from foreign suppliers. We have entered into several currency swap contracts, combined interest currency swap contracts and currency forward contracts to hedge our foreign currency risks.

The following table shows our assets and liabilities denominated in foreign currency as of December 31, 2021, 2022, and 2023:

	As of December 31,
	2021				2022				2023
(in thousands of foreign currencies)	Financial assets		Financial liabilities		Financial assets		Financial liabilities		Financial assets		Financial liabilities
U.S. Dollar		245,759		2,302,642		106,426		2,336,607		139,807		2,271,673
Special Drawing Right		255		722		255		722		254		722
Japanese Yen		29,227		30,000,763		32,801		400,002		17,496		400,002
British Pound		—		1,005		30		83		—		—
Euro		3,943		10,801		185		7,832		304		7,810
Rwandan Franc		586		—		15,521		13,025		402		—
Thai Bhat		2,160		—		265		—		244		—
Tanzanian Shilling		1,644		—		1,464		—		21,958		—
Botswana Pula		93		—		183		—		680		—
Hong Kong Dollar		—		105		37		—		—		—
Vietnamese Dong		257,895		—		280,226		—		380,629		—
Singapore Dollar		13		284,000		448		284,000		1,375		—
Taiwan Dollar		—		226		—		—		1,685		—
Ringgit Malaysia		—		—		1		—		—		—
Swiss Franc		—		161		—		—		—		25
Bulgarian Lev.		—		—		62		—		—		—
Pakistani Rupee		—		—		—		—		114,025		—

As of December 31, 2021, a 10% strengthening in the exchange rate between the Won and all foreign currencies, with all other variables held constant, would have decreased our income before income tax by ￦3 billion, and increased our total equity by ￦9 billion, with a 10% weakening in the exchange rate having the opposite effect. As of December 31, 2022, a 10% strengthening in the exchange rate between the Won and all foreign currencies, with all other variables held constant, would have decreased our income before income tax by ￦6 billion, and decreased our total equity by ￦16 billion, with a 10% weakening in the exchange rate having the opposite effect. As of December 31, 2023, a 10% strengthening in the exchange rate between the Won and all foreign currencies, with all other variable held constant, would have decreased our income before income tax by ￦10 billion, and decreased our total equity by ￦18 billion, with a 10% weakening in the exchange rate having the opposite effect. The foregoing sensitivity analysis assumes that all variables other than foreign exchange rates are held constant, and as such, does not reflect any correlation between foreign exchange rates and other variables, nor our decision to decrease the risk. See Note 36 of the notes to the Consolidated Financial Statements.

Interest Rate Risk

We are also subject to market risk exposure arising from changing interest rates. A reduction of interest rates increases the fair value of our debt portfolio, which is primarily of a fixed interest nature. We use, to a limited extent, interest rate swap contracts and combined interest rate and currency swap contracts to reduce interest rate volatility on some of our debt and manage our interest expense by achieving a balanced mixture of floating and fixed rate debt. We entered into several interest rate swap contracts in which we exchange fixed interest rate payments with variable interest rate payments for a specified period, as well as entered into the combined interest rate and currency swap contracts to hedge our interest rate risk.

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The following table summarizes the principal amounts, fair values, principal cash flows by maturity date and weighted average interest rates of our short-term and long-term liabilities as of December 31, 2023 which are sensitive to exchange rates and/or interest rates. The information is presented in Won, which is our reporting currency:

																December 31, 2023
	2024			2025			2026			2027			Thereafter			Total			Fair Value
	(in millions of Won, except rates)
Local currency:
Fixed rate		2,360,310			1,615,919			854,474			280,000			1,893,924			7,004,627			6,864,472
Average weighted rate (1)		2.57	%		2.93	%		2.66	%		3.16	%		3.10	%		2.83	%		—
Variable rate		118,900			254,008			—			—			40,000			412,908			412,908
Average weighted rate (1)		4.29	%		4.35	%		0.00	%		0.00	%		0.00	%		3.91	%		—
Subtotal		2,479,210			1,869,927			854,474			280,000			1,933,924			7,417,535			7,277,380
Foreign currency:
Fixed rate		81,307			1,160,460			515,760			386,820			128,940			2,273,287			3,935,815
Average weighted rate (1)		2.87	%		2.67	%		2.50	%		1.38	%		6.50	%		2.63	%		—
Variable rate		501,005			45,129			—			—			—			546,134			603,727
Average weighted rate (1)		6.65	%		7.27	%		0.00	%		0.00	%		0.00	%		6.70	%		—
Subtotal		582,312			1,205,589			515,760			386,820			128,940			2,819,421			4,539,542
Total		3,061,522			3,075,516			1,370,234			666,820			2,062,864			10,236,956			11,816,922

(1) Weighted average rates of the portfolio at the period end.

As of December 31, 2021, 2022 and 2023, a 100 basis point increase in the market interest rate, with all other variables held constant, would have increased our income before income tax by ￦0.8 billion, increased our income before income tax by ￦0.6 billion, and decreased our income before income tax by ￦2.7 billion, respectively. As of December 31, 2021, 2022 and 2023, such increase, with all other variables held constant, would have increased our total equity by ￦6 billion, decreased our total equity by ￦2 billion and decreased our total equity by ￦5 billion, respectively. 

As of December 31, 2021, 2022 and 2023, a 100 basis point decrease in the market interest rates, with all other variables held constant, would have decreased our income before income tax by ￦0.7 billion, decreased our income before income tax by ￦0.7 billion, and increased our income before income tax by ￦2.7 billion, respectively. As of December 31, 2021, 2022 and 2023, a 100 basis point decrease in the market interest rates, with all other variables held constant, would have decreased our total equity by ￦6 billion, increased our total equity by ￦2 billion and increased our total equity by ￦5 billion, respectively.

The foregoing sensitivity analyses assume that all variables other than market interest rates are held constant, and as such, does not reflect any correlation between market interest rates and other variables, nor our decision to decrease the risk, but reflects the effects of derivative contracts in place at the time of conducting the analysis.

Equity Price Risk

We are also subject to market risk exposure arising from changes in the equity securities market, which affect the fair value of our equity portfolio. As of December 31, 2021, 2022 and 2023, a 10% increase in the equity indices where our marketable equity securities are listed, with all other variables held constant, would have increased our income before income tax by ￦2 billion, ￦3 billion and ￦1 billion, respectively, with a 10% decrease in the equity index having the opposite effect. As of December 31, 2021, 2022 and 2023, a 10% increase in the equity indices where our marketable equity securities are listed, with all other variables held constant, would have increased our total equity by

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￦5 billion, ￦114 billion and ￦121 billion, respectively, with a 10% decrease in the equity index having the opposite effect. In 2022 and 2023, such amounts increased significantly due to our acquisition of shares in Shinhan Financial Group Co., Ltd., Hyundai Motor Company and Hyundai Mobis Co., Ltd. The foregoing sensitivity analysis assumes that all variables other than changes in the equity index are held constant, and that our marketable equity instruments had moved according to the historical correlation to the index, and as such, does not reflect any correlation between the equity index and other variables.

Item 12.  Description of Securities Other than Equity Securities

Item 12.A.  Debt Securities

Not applicable.

Item 12.B.  Warrants and Rights

Not applicable.

Item 12.C.  Other Securities

Not applicable.

Item 12.D.  American Depositary Shares

Fees and Charges

Under the terms of the deposit agreement, holders of our ADSs are required to pay the following service fees to the depositary:

Services	Fees
Issuance of ADSs upon deposit of shares	Up to $0.05 per ADS issued
Delivery of deposited shares against surrender of ADSs	Up to $0.05 per ADS surrendered
Distribution delivery of ADSs pursuant to sale or exercise of rights	Up to $0.02 per ADS held
Distributions of dividends	None
Distribution of securities other than ADSs	Up to $0.02 per ADS held
Other corporate action involving distributions to shareholders	Up to $0.02 per ADS held

Holders of our ADSs are also responsible for paying certain fees and expenses incurred by the depositary and certain taxes and governmental charges such as:

• fees for the transfer and registration of shares charged by the registrar and transfer agent for the shares in Korea (i.e., upon deposit and withdrawal of shares);

• expenses incurred for converting foreign currency into U.S. dollars;

• expenses for cable, telex and fax transmissions and for delivery of securities;

• taxes and duties upon the transfer of securities (i.e., when shares are deposited or withdrawn from deposit); and

• fees and expenses incurred in connection with the delivery or servicing of shares on deposit.

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Depositary fees payable upon the issuance and surrender of ADSs are typically paid to the depositary by the brokers (on behalf of their clients) receiving the newly issued ADSs from the depositary and by the brokers (on behalf of their clients) delivering the ADSs to the depositary for surrender. The brokers in turn charge these fees to their clients. Depositary fees payable in connection with distributions of cash or securities to ADS holders and the depositary services fee are charged by the depositary to the holders of record of ADSs as of the applicable ADS record date.

The depositary fees payable for cash distributions are generally deducted from the cash being distributed. In the case of distributions other than cash (i.e., stock dividend rights), the depositary charges the applicable fee to the ADS record-date holders concurrent with the distribution. In the case of ADSs registered in the name of the investor (whether certificated or uncertificated in direct registration), the depositary sends invoices to the applicable record-date ADS holders. In the case of ADSs held in brokerage and custodian accounts (via the Depository Trust Company, or DTC), the depositary generally collects its fees through the systems provided by DTC (whose nominee is the registered holder of the ADSs held in DTC) from the brokers and custodians holding ADSs in their DTC accounts. The brokers and custodians who hold their clients’ ADSs in DTC accounts in turn charge their clients’ accounts the amount of the fees paid to the depositary.

In the event of refusal to pay the depositary fees, the depositary may, under the terms of the deposit agreement, refuse to provide the requested service until payment is received or may set off the amount of the depositary fees from any distribution to be made to such holder of ADSs.

The fees and charges that holders of our ADSs may be required to pay may vary over time and may be changed by us and by the depositary. Holders of our ADSs will receive prior notice of such changes.

Fees and Payments from the Depositary to Us

In 2023, we received the following payments, after deduction of applicable U.S. taxes, from the depositary:

Reimbursement of NYSE listing fees	$	—
Reimbursement of SEC filing fees	$	—
Reimbursement of proxy process expenses (printing, postage and distribution)	$	242,009
Reimbursement of legal fees	$	—
Contributions toward our investor relations efforts (including non-deal roadshows, investor conferences and investor relations agency fees)	$	—

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PART II

Item 13.  Defaults, Dividend Arrearages and Delinquencies

Not applicable.

Item 14.  Material Modifications to the Rights of Security Holders and Use of Proceeds

Not applicable.

Item 15.  Controls and Procedures

Disclosure Controls and Procedures

Our management has evaluated, with the participation of our chief executive officer and chief financial officer, the effectiveness of our disclosure controls and procedures, as such term is defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act, as of December 31, 2023. There are inherent limitations to the effectiveness of any system of disclosure controls and procedures, including the possibility of human error and the circumvention or overriding of the controls and procedures. Accordingly, even effective disclosure controls and procedures can only provide reasonable assurance of achieving their control objectives. Based upon our evaluation, our chief executive officer and chief financial officer concluded that our disclosure controls and procedures were effective as of December 31, 2023. Our disclosure controls and procedures are designed to ensure that information required to be disclosed by us in the reports that we file or submit under the Exchange Act is recorded, processed, summarized and reported, within the time periods specified in the Commission’s rules and forms. Our disclosure controls and procedures include, without limitation, controls and procedures designed to ensure that information required to be disclosed by us in the reports that we file or submit under the Exchange Act is accumulated and communicated to our management, including our chief executive officer and chief financial officer, as appropriate to allow timely decisions regarding required disclosure.

Management’s Annual Report on Internal Control Over Financial Reporting

Our management is responsible for establishing and maintaining adequate internal control over financial reporting. Our internal control over financial reporting is a process designed by, and under the supervision of, our principal executive, principal operating and principal financial officers, and effected by our board of directors, management and other personnel, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles.

Our internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records, that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of our assets; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that our receipts and expenditures are being made only in accordance with authorizations of our management and directors; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use or disposition of our assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting is not intended to provide absolute assurance that a misstatement of our financial statements would be prevented or detected. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

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Our management has performed an assessment of the effectiveness of our internal control over financial reporting as of December 31, 2023, utilizing the criteria discussed in the Internal Control—Integrated Framework 2013 issued by the Committee of Sponsoring Organizations of the Treadway Commission. Based on this assessment, we concluded that our internal control over financial reporting was effective as of December 31, 2023.

Deloitte Anjin, an independent registered public accounting firm, which also audited our consolidated financial statements as of, and for the year ended December 31, 2023, as stated in their report which is included herein, has issued an attestation report on the effectiveness of our internal control over financial reporting.

Attestation Report of the Registered Public Accounting Firm

The attestation report of our independent registered public accounting firm on the effectiveness of our internal control over financial reporting is furnished in Item 18 of this Form 20-F.

Changes in Internal Control Over Financial Reporting

There has been no change in our internal control over financial reporting during 2023 that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

Item 16.  [Reserved]

Item 16A.  Audit Committee Financial Expert

Our Audit Committee is comprised of Yeong Kyun Ahn, Yong-Hun Kim, Seong Hoon Lee and Seung Ah Theresa Cho. The board of directors has determined that Yeong Kyun Ahn is the financial expert of the Audit Committee. Yeong Kyun Ahn is independent as such term is defined in Section 303A.02 of the NYSE Listed Company Manual, Rule 10A-3 under the Exchange Act and the Korea Stock Exchange listing standards.

Item 16B.  Code of Ethics

We have adopted a code of ethics, as defined in Item 16B. of Form 20-F under the Exchange Act. Our code of ethics applies to our chief executive officer, chief financial officer and persons performing similar functions, as well as to our directors, other officers and employees. Our code of ethics is available on our web site at www.kt.com. If we amend the provisions of our code of ethics that apply to our chief executive officer, chief financial officer and persons performing similar functions, or if we grant any waiver of such provisions, we will disclose such amendment or waiver on our website.

Item 16C.  Principal Accountant Fees and Services

Audit and Non-Audit Fees

The following table sets forth the fees billed to us by Deloitte Anjin for the fiscal year ended December 31, 2023.

	Year Ended December 31, 2023
	(In millions)
Audit fees (1)	￦	6,679
Tax fees (2)		22
All other fees		390
Total fees		7,091

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(1) Audit fees consist of fees for the annual audit and quarterly review services engagement.

(2) Tax fees consist of fee for tax services which are mainly the preparation of tax returns or non-recurring tax compliance review of original or amended tax returns.

The following table sets forth the fees billed to us by Samil PricewaterhouseCoopers for the fiscal year ended December 31, 2022.

	Year Ended December 31, 2022
	(In millions)
Audit fees (1)	￦	5,808
Tax fees (2)		97
All other fees		406
Total fees		6,311

(1) Audit fees consist of fees for the annual audit and quarterly review services engagement and comfort letters.

(2) Tax fees consist of fee for tax services which are mainly the preparation of tax returns or non-recurring tax compliance review of original or amended tax returns.

Audit Committee Pre-Approval Policies and Procedures

Our Audit Committee has established pre-approval policies and procedures to pre-approve all audit services to be provided by Deloitte Anjin, our independent registered public accounting firm. Our Audit Committee’s policy regarding the pre-approval of non-audit services to be provided to us by our independent registered public accounting firm is that all such services shall be pre-approved by our Audit Committee. Non-audit services that are prohibited to be provided to us by our independent registered public accounting firm under the rules of the SEC and applicable law may not be pre-approved. In addition, prior to the granting of any pre-approval, our Audit Committee must be satisfied that the performance of the services in question will not compromise the independence of our independent registered public accounting firm and does not include delegation of the Audit Committee’s responsibilities to the management under the Exchange Act.

Our Audit Committee did not pre-approve any non-audit services under the de minimis exception of Rule 2-01 (c)(7)(i)(C) of Regulation S-X as promulgated by the SEC.

Item 16D.  Exemptions from the Listing Standards for Audit Committees

Not applicable.

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Item 16E.  Purchases of Equity Securities by the Issuer and Affiliated Purchasers

The following table sets forth the repurchases of ordinary shares by us or any affiliated purchasers during 2023:

Period	Total Number of Shares Purchased		Average Price Paid per Share (In Won)		Total Number of Shares Purchased as Part of Publicly Announced Plans		Approximate Value of Shares that May Yet Be Purchased Under the Plans (In billions of Won)
January 1 to January 31		—	￦	—		—	￦	—
February 1 to February 29		1,100,000		31,987		1,100,000		265
March 1 to March 31		2,889,063		30,041		2,889,063		178
April 1 to April 30		2,400,000		30,495		2,400,000		105
May 1 to May 31		2,400,000		31,346		2,400,000		30
June 1 to June 30		966,889		30,709		966,889		—
July 1 to July 31		4,994		31,350		—		—
August 1 to August 31		—		—		—		—
September 1 to September 30		—		—		—		—
October 1 to October 31		—		—		—		—
November 1 to November 30		—		—		—		—
December 1 to December 31		—		—		—		—
Total		9,760,946	￦	30,760		9,755,952	￦	—

Item 16F.  Change in Registrant’s Certifying Accountant

The disclosure called for by paragraph (a) of this Item 16F was previously reported, as that term is defined in Rule 12b-2 under the Exchange Act, in our Annual Report on Form 20-F for the year ended December 31, 2022, filed on April 28, 2023.

Item 16G.  Corporate Governance

The following is a summary of the significant differences between the New York Stock Exchange’s corporate governance standards and those that we follow under Korean law:

NYSE Corporate Governance Standards	KT Corporation’s Corporate Governance Practice
Director Independence
Independent directors must comprise a majority of the board.	The Commercial Code of Korea requires that our board of directors must comprise no less than a majority of outside directors. Our outside directors must meet the criteria for outside directorship set forth under the Commercial Code of Korea. The majority of our board of directors is independent (as defined in accordance with the New York Stock Exchange’s standards), and 8 out of 10 directors are outside directors.
Nominating/Corporate Governance Committee
Listed companies must have a nominating/corporate governance committee composed entirely of independent directors.	We maintain a Director Candidate Recommendation Committee composed of all of our outside directors. We also maintain a Corporate Governance Committee comprised of four outside directors. The committee is responsible for the review of matters with respect to our Corporate Governance Guidelines and our performance under such guidelines to monitor effectiveness of our corporate governance.
Compensation Committee
Listed companies must have a compensation committee composed entirely of independent directors.	We maintain an Evaluation and Compensation Committee composed of four outside directors.

103

Executive Session
Non-management directors must meet in regularly scheduled executive sessions without management.	Our outside directors hold meetings solely attended by outside directors in accordance with the charter of our board of directors.
Audit Committee
Listed companies must have an audit committee which has a minimum of three directors and satisfy the requirements of Rule 10A-3 under the Exchange Act.	We maintain an Audit Committee comprised of four outside directors who meet the applicable independence criteria set forth under Rule 10A-3 under the Exchange Act.
Shareholder Approval of Equity Compensation Plan
Listed companies must allow their shareholders to exercise their voting rights with respect to any material revision to the company’s equity compensation plan.	We currently have three equity compensation plans: one providing for stock grants to officers and directors; another providing for performance bonuses to employees that are payable in cash or common shares based on election by the employees; and an employee stock ownership association program. All material matters related to the granting stock options are provided in our articles of incorporation, and any amendments to the articles of incorporation are subject to shareholders’ approval. Matters related to performance bonuses or the employee stock ownership association program are not subject to shareholders’ approval under Korean law.
Shareholder Approval of Equity Offerings
Listed companies must allow its shareholders to exercise their voting rights with respect to equity offerings that do not qualify as public offerings for cash, and offerings of equity of related parties.	Voting rights are not separately provided for equity offerings that do not qualify as public offerings for cash, or offerings of equity of related parties.
Corporate Governance Guidelines
Listed companies must adopt and disclose corporate governance guidelines.	We have adopted Corporate Governance Guidelines in March 2007 setting forth our practices with respect to corporate governance matters. Our Corporate Governance Guidelines are in compliance with Korean law but do not meet all requirements established by the New York Stock Exchange for U.S. companies listed on the exchange. A copy of our Corporate Governance Guidelines in Korean is available on our website at www.kt.com.
Code of Business Conduct and Ethics
Listed companies must adopt and disclose a code of business conduct and ethics for directors, officers and employees, and promptly disclose any waivers of the code for executive officers.	We have adopted a Code of Ethics for all directors, officers and employees. A copy of our Code of Ethics in Korean is available on our website at www.kt.com

Item 16H.  Mine Safety Disclosure

Not applicable.

Item 16I.  Disclosure regarding Foreign Jurisdictions that Prevent Inspections

Not applicable.

Item 16J.  Insider Trading Policies

Not applicable.

104

Item 16K.  Cybersecurity

Risk Management and Strategy

We maintain a comprehensive process for assessing, identifying and managing material risks from cybersecurity threats, including risks related to disruption of business operations and financial reporting systems and customer information protection, as part of our overall enterprise risk management system and processes. Our enterprise risk management program considers cybersecurity risks alongside other company risks, and our enterprise risk professionals consult with company subject matter experts to gather information necessary to identify cybersecurity risks, and evaluate their nature and severity, as well as identify mitigations and assess the impact of those mitigations on residual risk. Our cybersecurity risk management practices include development, implementation and improvement of policies and procedures to safeguard our network infrastructure and customer information and ensure availability of critical data and systems.

We understand the importance of protecting our network infrastructure and preserving trust and protecting personal information from cybersecurity threats including distributed denial-of-service (“DDoS”) attacks and advanced persistent threat (“APT”) attacks. To assist us, we have a cybersecurity governance framework in place, which is designed to protect network infrastructure and information systems from unauthorized access, use, disclosure, disruption, modification or destruction. Our cybersecurity program consists of controls designed to identify, protect against, detect, respond to and recover from, cybersecurity incidents. The program is built upon a foundation of advanced security technology and overseen by an experienced and trained team of experts with substantial knowledge of cybersecurity best practices.

We actively engage in various activities to protect our network infrastructure from cybersecurity threats and to ensure that our customers can use the Internet safely. We believe we are the first Korean telecommunications company to deploy security measures to all overseas interconnection network sections utilized by us in order to preemptively block abnormal traffic from both domestic and international sources. Our technical measures also include:

• operation of a comprehensive security control system to protect against and monitor suspected hacking and abnormal behaviors in real-time;

• operation of the IT/ Network Integrated Cyber Security Center, a non-stop comprehensive response system;

• digital rights management to control access to copyrighted materials; and

• encryption of personal information and control database commands.

When we adopt a new information system or change an existing system, we carry out a security approval process to review technical and administrative protection measures and make improvements if any issues are found. We conduct technical security review during the designing stage of our system development. We utilize policies, software, training programs and hardware solutions to protect and monitor our environment, including multifactor authentication on all critical systems, firewalls, intrusion detection and prevention systems, vulnerability and penetration testing and identity management systems. Our platform includes a host of encryption, antivirus, multi-factor authentication, firewall and patch-management technologies designed to protect and maintain the systems and computers across our business. We also conduct mock hackings of our websites and application services. To strengthen customer information protection, we engage in inspection of suppliers and other third parties that possess customer information as well as perform mock drills to prepare against infringement or leakage of personal information. We subscribe to liability insurance to ensure compensation for our customers in the unlikely event of any damage caused by information leakage.

105

Our cybersecurity team regularly tests our controls through penetration testing, vulnerability scanning and attack simulation. We conduct risk assessments periodically to identify threats and vulnerabilities, and then determine the likelihood and impact for each risk using a qualitative risk assessment methodology. Risks are identified from various sources, including vulnerability scans, penetration tests, vendors risk assessments, product and services audits, internal compliance assessments and threat-hunting operations. We monitor our infrastructure and applications to identify evolving cyber threats, scan for vulnerabilities and mitigate risks. 

We also maintain a robust cybersecurity incident response plan, which provides a framework for handling cybersecurity incidents based on the severity of the incident and facilitates cross-functional coordination across the company. Our incident response plan coordinates the activities we take to prepare for, detect, respond to and recover from cybersecurity incidents, which include processes to triage, assess the severity of, escalate, contain, investigate and remediate, the incident, as well as to comply with potentially applicable legal obligations and mitigate brand and reputational damage. In order to efficiently respond to company-wide crises, such as large-scale network infrastructure failures and personal information leaks, we regularly update our crisis response action manual and conduct annual mock drills.

We value collaboration with external evaluators, consultants, auditors and other third parties to strengthen and continually improve our cybersecurity risk management processes. In connection with our cybersecurity risk management processes, we engage external consultants from security companies to assist in the design and implementation of our cybersecurity risk assessment and management processes. In particular, they provide the expertise necessary to (i) identify and analyze new cybersecurity threats, (ii) identify and improve vulnerabilities through mock hacking and (iii) analyze and respond to new threats in real time through integrated security control.

Our cybersecurity risk management processes extend to the oversight and identification of threats associated with our use of third-party service providers. Our cybersecurity risk management program includes due diligence on service providers’ information security programs. We review our service providers’ cybersecurity practices before we enter into business transactions with them, and we seek to contractually obligate them to operate their environments in accordance with strict cybersecurity standards.

In the past, we have experienced cyber-attacks of varying degrees from time to time, including theft of personal information of our subscribers by third parties that have led to lawsuits and administrative actions against us alleging that the leak was related to our mismanagement of subscribers’ personal information. Although our business, financial condition and results of operations have not been materially affected by such incidents, we cannot provide any assurance that we will not be materially affected in the future by risks from cybersecurity threats. See “Item 3.D. Risk Factors — Cybersecurity breaches may expose us to significant legal and financial exposure, damage to our reputation and a loss of confidence of our customers” for more information on risks from cybersecurity threats that are reasonably likely to materially affect our business, financial condition and results of operations.

Governance

Management

The cybersecurity risk management processes described above are managed by the Chief Information Security Officer who reports to our Chief Executive Officer. Our current Chief Information Security Officer has been serving in such capacity since December 2023. He has a masters degree in information security and technology, and he previously served as an executive officer of KT

106

Corporation and other member companies of the KT Group from January 2017 to November 2023. Our Chief Information Security Officer is supported by the company at the highest levels and regularly engages with information security managers of each division.

Our Chief Information Security Officer heads the Information Security Department under the IT Division and serves as the chairperson of the Information Security Committee, which discusses the latest trends in cybersecurity, risks identified, security measures implemented, coordination of security protocols among various business divisions, and effectiveness of such security protocols. The Information Security Committee annually reviews and approves our cybersecurity risk management processes. In addition, starting in 2022, we have been strengthening our risk detection and response capabilities by consolidating the enterprise risk management of the KT Group through collaborative measures such as implementing a bi-weekly working council with regional headquarters, business divisions and member companies of the KT Group.

Board of Directors

Our Board of Directors is committed to mitigating data privacy and cybersecurity risks and recognizes the importance of these issues as part of our risk management framework. While the Board of Directors maintains ultimate responsibility for the oversight of our data privacy and cybersecurity program and risks, it has delegated certain responsibilities to the Audit Committee of the Board of Directors. This committee-level focus on data privacy and cybersecurity allows the board to further enhance its understanding of these issues. The Audit Committee assists the Board of Directors in its oversight of our data privacy and cybersecurity needs by staying apprised of our data privacy and information security programs, strategy, policies, standards, architecture, processes and material risks, and overseeing responses to security and data incidents.

Our Board of Directors and the Audit Committee’s principal role is one of oversight, recognizing that management is responsible for the design, implementation and maintenance of an effective program for protecting against and mitigating data privacy and cybersecurity risks. The Chief Information Security Officer, as the chairperson of the Information Security Committee, provides updates to the Compliance Subcommittee operated by the Audit Committee on a periodic basis and, as necessary, to the Board of Directors. These regular reports include detailed updates on our performance preparing for, preventing, detecting, responding to and recovering from cyber incidents. The Chief Information Security Officer also promptly informs and updates the Compliance Subcommittee operated by the Audit Committee about any information security incidents that may pose significant risk to the KT Group. Members of the Board of Directors stay apprised of the rapidly evolving cyber threat landscape and provide guidance to management as appropriate in order to address the effectiveness of our overall data privacy and cybersecurity program.

107

PART III

Item 17.  Financial Statements

Not applicable.

Item 18.  Financial Statements

AUDITED CONSOLIDATED ANNUAL FINANCIAL STATEMENTS OF KT CORPORATION

	Page
Report of Independent Registered Public Accounting Firm (PCAOB ID 1098)		F-2
Report of Independent Registered Public Accounting Firm (PCAOB ID 1103)		F-5
Consolidated Statements of Financial Position as of December 31, 2022 and December 31, 2023		F-6
Consolidated Statements of Profit or Loss for the Years Ended December 31, 2021, 2022 and 2023		F-8
Consolidated Statements of Comprehensive Income for the Years Ended December 31, 2021, 2022 and 2023		F-9
Consolidated Statements of Changes in Equity for the Years Ended December 31, 2021, 2022 and 2023		F-10
Consolidated Statements of Cash Flows for the Years Ended December 31, 2021, 2022 and 2023		F-13
Notes to the Consolidated Financial Statements		F-14

108

Item 19.  Exhibits

1	Articles of Incorporation of KT Corporation (English translation)
2.1*	Deposit Agreement dated as of May 25, 1999 entered into among KT Corporation, Citibank, N.A., as depositary, and all Holders and Beneficial Owners of American Depositary Shares evidenced by the American Depositary Receipts issued thereunder, including the form of American depositary receipt (incorporated herein by reference to Exhibit (a)(i) of the Registrant’s Registration Statement (Registration No. 333-13578) on Form F-6)
2.2*	Form of Amendment No. 1 to Deposit Agreement dated as of May 25, 1999 entered into among KT Corporation, Citibank, N.A., as depositary, and all Holders and Beneficial Owners of American Depositary Shares evidenced by the American Depositary Receipts issued thereunder, including the form of American depositary receipt (incorporated herein by reference to Exhibit (a)(ii) of the Registrant’s Registration Statement (Registration No. 333-13578) on Form F-6)
2.3*	Letter from Citibank, N.A., as depositary, to the Registrant relating to the establishment of a direct registration system for ADSs and the issuance of uncertified ADSs as part of the direct registration system (incorporated herein by reference to Exhibit 2.4 of the Registrant’s Annual Report on Form 20-F filed on June 30, 2008)
2.4	Description of common stock (see Item 10.B. Memorandum and Articles of Association)
2.5*	Description of American Depositary Shares (incorporated herein by reference to Exhibit 2.6 of the Registrant’s Annual Report on Form 20-F filed on April 29, 2020)
8.1	List of subsidiaries of KT Corporation
12.1	Certification pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
12.2	Certification pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
13.1	Certification pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
97.1	Regulation on Recovery of Erroneously Awarded Compensation to Executive Officers
101.INS	Inline XBRL Instance Document – the instance document does not appear in the Interactive Data File as its XBRL tags are embedded within the Inline XBRL document.
101.SCH	Inline XBRL Taxonomy Extension Schema Document
101.CAL	Inline XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF	Inline XBRL Taxonomy Extension Definition Linkbase Document
101.LAB	Inline XBRL Taxonomy Extension Label Linkbase Document
101.PRE	Inline XBRL Taxonomy Extension Presentation Linkbase Document
104	The cover page for the Company’s Annual Report on Form 20-F for the year ended December 31, 2023, has been formatted in Inline XBRL

* Filed previously.

(P) Paper filing.

109

INDEX TO CONSOLIDATED FINANCIAL STATEMENTS

	Page
Report of Independent Registered Public Accounting Firm (PCAOB ID 1098)		F-2
Report of Independent Registered Public Accounting Firm (PCAOB ID 1103)		F-5
Consolidated Statements of Financial Position as of December 31, 2022 and December 31, 2023		F-6
Consolidated Statements of Profit or Loss for the Years Ended December 31, 2021, 2022 and 2023		F-8
Consolidated Statements of Comprehensive Income for the Years Ended December 31, 2021, 2022 and 2023		F-9
Consolidated Statements of Changes in Equity for the Years Ended December 31, 2021, 2022 and 2023		F-10
Consolidated Statements of Cash Flows for the Years Ended December 31, 2021, 2022 and 2023		F-13
Notes to the Consolidated Financial Statements		F-14

F-1

Report of Independent Registered Public Accounting Firm

To the Board of Directors and Shareholders of KT Corporation

Opinions on the Financial Statements and Internal Control over Financial Reporting

We have audited the accompanying consolidated statement of financial position of KT Corporation and its subsidiaries (the “Company”) as of December 31, 2023, the related consolidated statements of profit or loss, comprehensive income, changes in equity, and cash flows, for the year ended December 31, 2023, and the related notes (collectively referred to as the “financial statements”). We also have audited the Company’s internal control over financial reporting as of December 31, 2023, based on criteria established in Internal Control—Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO).

In our opinion, the financial statements referred to above present fairly, in all material respects, the financial position of the Company as of December 31, 2023, and the results of its operations and its cash flows for the year ended December 31, 2023, in conformity with International Financial Reporting Standards as issued by the International Accounting Standards Board. Also, in our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2023, based on criteria established in Internal Control—Integrated Framework (2013) issued by COSO.

Basis for Opinions

The Company’s management is responsible for these financial statements, for maintaining effective internal control over financial reporting, and for its assessment of the effectiveness of internal control over financial reporting, included in the accompanying Management’s Annual Report on Internal Control over Financial Reporting included in Item 15. Our responsibility is to express an opinion on the Company’s financial statements and an opinion on the Company’s internal control over financial reporting based on our audit. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud, and whether effective internal control over financial reporting was maintained in all material respects.

Our audit of the financial statements included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures to respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audit also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. Our audit of internal control over financial reporting included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, and testing and evaluating the design and operating effectiveness of internal control based on the assessed risk. Our audit also included performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinions.

Definition and Limitations of Internal Control over Financial Reporting

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for

F-2

external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

Critical Audit Matter

The critical audit matter communicated below is a matter arising from the current-period audit of the financial statements that was communicated or required to be communicated to the audit committee and that (1) relates to accounts or disclosures that are material to the financial statements and (2) involved our especially challenging, subjective, or complex judgments. The communication of critical audit matters does not alter in any way our opinion on the consolidated financial statements, taken as a whole, and we are not, by communicating the critical audit matter below, providing a separate opinion on the critical audit matter or on the accounts or disclosures to which it relates.

Mobile services revenue and handset revenue for mobile services (“Mobile revenue”)—Refer to Notes 2 and 25 to the consolidated financial statements

Critical Audit Matter Description

As described in Note 2.25 to the financial statements, the Company recognizes handset revenue for mobile services at the point in time when control of the handset is transferred to the customer. The Company recognizes telecommunication services revenue over the estimated periods of each service by transferring promised services to customers. Due to the large volume of low-dollar transactions with customers, the Company needs complex and elaborate information technology systems to accurately record mobile revenue.

We identified the occurrence and accuracy of mobile revenue as a critical audit matter given the magnitude and complexity of mobile revenue recorded in the billing system of the Company, which required the involvement of professionals with expertise in information technology (IT) necessary for us to identify and test the Company’s billing system used in processing the mobile revenue transactions.

How the Critical Audit Matter Was Addressed in the Audit

Our audit procedures related to the Company’s mobile revenue transactions included the following, among others:

• We obtained an understanding of the Company’s information system and business processes, relevant to mobile revenue.

• With the assistance of our IT specialists, we identified the relevant systems used to process mobile revenue and tested the relevant general information technology controls.

• We reconciled the mobile revenue in the billing system with the revenue in the ledger.

• We developed an expectation of mobile services revenue amounts using historical service revenue and subscriber information and compared it to the recorded amount.

F-3

• We tested the accuracy and completeness of the subscriber information used in our audit procedures by selecting a sample of the subscriber information and agreed the selected subscriber information to supporting documentation.

• To verify the occurrence and accuracy of handset revenue for mobile services, we selected transactions from the sub-ledger, reconciled the selection with contractual terms between the Company and customers of the Company, and compared the billed amounts to receipts.

/s/ Deloitte Anjin LLC

Seoul, Korea

April 29, 2024

We have served as the Company’s auditor since 2023.

F-4

Report of Independent Registered Public Accounting Firm

To the shareholder and board of directors of KT Corporation

Opinion on the Financial Statements

We have audited the consolidated statement of financial position of KT Corporation, and its subsidiaries (the “Company”) as of December 31, 2022, and the related consolidated statements of comprehensive income, of changes in equity and of cash flows for each of the two years in the period ended December 31, 2022, including the related notes (collectively referred to as the “consolidated financial statements”). In our opinion, the consolidated financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2022, and the results of its operations and its cash flows for each of the two years in the period ended December 31, 2022 in conformity with International Financial Reporting Standards as issued by the International Accounting Standards Board.

Basis for Opinion

These consolidated financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on the Company’s consolidated financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits of these consolidated financial statements in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the consolidated financial statements are free of material misstatement, whether due to error or fraud.

Our audits included performing procedures to assess the risks of material misstatement of the consolidated financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the consolidated financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the consolidated financial statements. We believe that our audits provide a reasonable basis for our opinion.

/s/Samil PricewaterhouseCoopers

Seoul, Korea

April 28, 2023

We served as the Company’s auditor from 2010 to 2023.

F-5

KT Corporation and Subsidiaries

Consolidated Statements of Financial Position

As of December 31, 2022 and 2023

(In millions of Korean won)	Notes		December 31, 2022		December 31, 2023
Assets
Current assets
Cash and cash equivalents		4,5,37	￦	2,449,062	￦	2,879,554
Trade and other receivables, net		4,6,37		6,098,072		7,170,289
Other financial assets		4,7,37		1,322,452		1,440,200
Current income tax assets				1,543		3,299
Inventories, net		8		717,673		988,351
Other current assets		9		2,101,212		2,112,553
Total current assets				12,690,014		14,594,246
Non-current assets
Trade and other receivables, net		4,6,37		1,491,046		1,404,168
Other financial assets		4,7,37		2,501,484		2,724,761
Property and equipment, net		10		14,772,179		14,872,079
Right-of-use assets		20		1,280,334		1,304,963
Investment properties, net		11,37		1,933,358		2,198,135
Intangible assets, net		12		3,129,833		2,533,861
Investments in associates and joint ventures		13		1,480,722		1,556,889
Deferred income tax assets		29		579,090		614,500
Net defined benefit assets		17		311,142		160,748
Other non-current assets		9		820,608		827,297
Total non-current assets				28,299,796		28,197,401
Total assets			￦	40,989,810	￦	42,791,647

F-6

KT Corporation and Subsidiaries

Consolidated Statements of Financial Position (Continued)

As of December 31, 2022 and 2023

(In millions of Korean won)	Notes		December 31, 2022			December 31, 2023
Liabilities
Current liabilities
Trade and other payables		4,14,37	￦	7,333,165		￦	8,054,922
Borrowings		4,15,37		1,827,042			3,058,564
Other financial liabilities		4,7,37		8,791			322,099
Current income tax liabilities				232,382			236,463
Provisions		16		109,133			115,209
Deferred revenue		25		55,737			51,537
Other current liabilities		9		1,133,018			1,408,843
Total current liabilities				10,699,268			13,247,637
Non-current liabilities
Trade and other payables		4,14,37		1,064,099			819,558
Borrowings		4,15,37		8,179,643			7,159,601
Other financial liabilities		4,7,37		412,650			753,739
Defined benefit liabilities, net		17		51,654			63,616
Provisions		16		91,233			107,014
Deferred revenue		25		165,186			153,563
Deferred income tax liabilities		29		967,650			994,330
Other non-current liabilities		9		945,731			950,015
Total non-current liabilities				11,877,846			11,001,436
Total liabilities				22,577,114			24,249,073
Equity
Share capital		21		1,564,499			1,564,499
Share premium				1,440,258			1,440,258
Retained earnings		22		14,255,316			14,475,867
Accumulated other comprehensive income(loss)		23		(77,776	)		52,407
Other components of equity		23		(572,152	)		(802,418	)
Equity attributable to owners of the Controlling Company				16,610,145			16,730,614
Non-controlling interest				1,802,551			1,811,961
Total equity				18,412,696			18,542,575
Total liabilities and equity			￦	40,989,810		￦	42,791,647

The above consolidated statements of financial position should be read in conjunction with the accompanying notes.

F-7

KT Corporation and Subsidiaries

Consolidated Statements of Profit or Loss

Years ended December 31, 2021, 2022 and 2023

(In millions of Korean won)	Notes	2021			2022			2023
Operating revenue and other Income	25	￦	25,205,659		￦	26,234,206		￦	26,595,245
Revenue			24,898,005			25,638,855			26,287,201
Other income	26		307,654			595,351			308,044
Operating expenses	27		23,506,262			24,266,049			25,166,796
Operating profit			1,699,397			1,968,157			1,428,449
Finance income	28		726,283			690,428			486,277
Finance costs	28		(563,330	)		(749,908	)		(568,682	)
Share of net profits of associates and joint ventures	13		116,061			(17,285	)		(43,424	)
Profit before income tax			1,978,411			1,891,392			1,302,620
Income tax expense	29		519,016			505,757			330,438
Profit for the year		￦	1,459,395		￦	1,385,635		￦	972,182
Profit for the year attributable to:
Owners of the Controlling Company		￦	1,356,878		￦	1,260,470		￦	993,325
Non-controlling interest		￦	102,517		￦	125,165		￦	(21,143	)
Earnings per share attributable to the equity holders of the Controlling Company during the year (in Korean won):
Basic earnings per share	30	￦	5,759		￦	5,200		￦	3,982
Diluted earnings per share	30	￦	5,747		￦	5,196		￦	3,977

The above consolidated statements of profit or loss should be read in conjunction with the accompanying notes.

F-8

KT Corporation and Subsidiaries

Consolidated Statements of Comprehensive Income

Years ended December 31, 2021, 2022 and 2023

(In millions of Korean won)
	Notes		2021			2022			2023
Profit for the year			￦	1,459,395		￦	1,385,635		￦	972,182
Other comprehensive income
Items that will not be reclassified to profit or loss:
Remeasurements of the net defined benefit liability		17		55,822			181,429			(137,465	)
Shares of remeasurement gain (loss) of associates and joint ventures				(1,596	)		(332	)		(105	)
Gain (loss) on valuation of equity instruments at fair value through other comprehensive income		4		144,890			(141,944	)		121,271
Items that may be subsequently reclassified to profit or loss:
Gain(loss) on valuation of debt instruments at fair value through other comprehensive income		4		(15,110	)		(16,630	)		534
Valuation gain (loss) on cash flow hedge		4,7		141,855			64,091			15,329
Other comprehensive income (loss) from cash flow hedges reclassified to profit (loss)		4		(136,583	)		(95,421	)		(37,942	)
Share of other comprehensive income (loss) from associates and joint ventures				(24,216	)		(10,851	)		21,595
Exchange differences on translation of foreign operations				505			17,464			24,230
Total other comprehensive income				165,567			(2,194	)		7,447
Total comprehensive income for the year			￦	1,624,962		￦	1,383,441		￦	979,629
Total comprehensive income for the year attributable to:
Owners of the Controlling Company				1,510,373			1,234,651			996,999
Non-controlling interest				114,589			148,790			(17,370	)

The above consolidated statements of comprehensive income should be read in conjunction with the accompanying notes.

F-9

KT Corporation and Subsidiaries

Consolidated Statements of Changes in Equity

Years ended December 31, 2021, 2022 and 2023

			Attributable to owners of the Controlling Company
(In millions of Korean won)	Notes		Share capital		Share premium		Retained earnings			Accumulated other comprehensive income			Other components of equity			Total			Non-controlling interest			Total equity
Balance as at January 1, 2021			￦	1,564,499	￦	1,440,258	￦	12,155,420		￦	86,051		￦	(1,234,784	)	￦	14,011,444		￦	1,539,989		￦	15,551,433
Comprehensive income
Profit for the year				—		—		1,356,878			—			—			1,356,878			102,517			1,459,395
Remeasurements of net defined benefit liabilities		17,29		—		—		47,348			—			—			47,348			8,474			55,822
Share of gain on remeasurements of associates and joint ventures				—		—		(1,559	)		—			—			(1,559	)		(37	)		(1,596	)
Share of other comprehensive loss of associates and joint ventures				—		—		—			(19,718	)		—			(19,718	)		(4,498	)		(24,216	)
Valuation gain on cash flow hedge		4,29		—		—		—			5,222			—			5,222			50			5,272
Gain on valuation of financial instruments at fair value through other comprehensive income		4,29		—		—		76,288			47,247			—			123,535			6,245			129,780
Exchange differences on translation of foreign operations				—		—		—			(1,333	)		—			(1,333	)		1,838			505
Total comprehensive income for the year				—		—		1,478,955			31,418			—			1,510,373			114,589			1,624,962
Transactions with owners
Dividends paid by the Controlling Company		31		—		—		(326,487	)		—			—			(326,487	)		—			(326,487	)
Dividends paid to non-controlling interest of subsidiaries				—		—		—			—			—			—			(23,762	)		(23,762	)
Acquisition and disposition of businesses				—		—		—			—			—			—			(17,566	)		(17,566	)
Changes in ownership interest in subsidiaries				—		—		—			—			15,797			15,797			(22,620	)		(6,823	)
Appropriations of loss on disposal of treasury stock				—		—		(20,498	)		—			20,498			—			—			—
Acquisition of treasury stock				—		—		—			—			(190,105	)		(190,105	)		—			(190,105	)
Disposal of treasury stock				—		—		—			—			50,954			50,954			—			50,954
Recognition of the obligation to purchase its own equity				—		—		—			—			(101,829	)		(101,829	)		—			(101,829	)
Others				—		—		—			—			6,389			6,389			(5	)		6,384
Subtotal				—		—		(346,985	)		—			(198,296	)		(545,281	)		(63,953	)		(609,234	)
Balance as at December 31, 2021			￦	1,564,499	￦	1,440,258	￦	13,287,390		￦	117,469		￦	(1,433,080	)	￦	14,976,536		￦	1,590,625		￦	16,567,161

The above consolidated statements of changes in equity should be read in conjunction with the accompanying notes.

F-10

KT Corporation and Subsidiaries

Consolidated Statements of Changes in Equity (Continued)

Years ended December 31, 2021, 2022 and 2023

			Attributable to owners of the Controlling Company
(In millions of Korean won)	Notes		Share capital		Share premium		Retained earnings			Accumulated other comprehensive income			Other components of equity			Total			Non-controlling interest			Total equity
Balance as at January 1, 2022			￦	1,564,499	￦	1,440,258	￦	13,287,390		￦	117,469		￦	(1,433,080	)	￦	14,976,536		￦	1,590,625		￦	16,567,161
Comprehensive income
Profit for the year				—		—		1,260,470			—			—			1,260,470			125,165			1,385,635
Remeasurements of net defined benefit liabilities		17,29		—		—		165,524			—			—			165,524			15,905			181,429
Share of gain on remeasurements of associates and joint ventures				—		—		(189	)		—			—			(189	)		(143	)		(332	)
Share of other comprehensive loss of associates and joint ventures				—		—		—			(8,291	)		—			(8,291	)		(2,560	)		(10,851	)
Valuation loss on cash flow hedge		4,29		—		—		—			(32,140	)		—			(32,140	)		810			(31,330	)
Loss on valuation of financial instruments at fair value through other comprehensive income(loss)		4,29		—		—		4,091			(160,785	)		—			(156,694	)		(1,880	)		(158,574	)
Exchange differences on translation of foreign operations				—		—		—			5,971			—			5,971			11,493			17,464
Total comprehensive income for the year				—		—		1,429,896			(195,245	)		—			1,234,651			148,790			1,383,441
Transactions with owners
Dividends paid by the Controlling Company		31		—		—		(450,393	)		—			—			(450,393	)		—			(450,393	)
Dividends paid to non-controlling interest of subsidiaries				—		—		—			—			—			—			(26,407	)		(26,407	)
Acquisition and disposition of businesses				—		—		—			—			—			—			3,152			3,152
Changes in ownership interest in subsidiaries				—		—		—			—			88,924			88,924			32,695			121,619
Appropriations of loss on disposal of treasury stock				—		—		(11,577	)		—			11,577			—			—			—
Disposal of treasury stock				—		—		—			—			763,081			763,081			—			763,081
Conversion of redeemable convertible preferred shares of subsidiaries to common shares				—		—		—			—						—			51,476			51,476
Others				—		—		—			—			(2,654	)		(2,654	)		2,220			(434	)
Subtotal				—		—		(461,970	)		—			860,928			398,958			63,136			462,094
Balance as at December 31, 2022			￦	1,564,499	￦	1,440,258	￦	14,255,316		￦	(77,776	)	￦	(572,152	)	￦	16,610,145		￦	1,802,551		￦	18,412,696

The above consolidated statements of changes in equity should be read in conjunction with the accompanying notes.

F-11

KT Corporation and Subsidiaries

Consolidated Statements of Changes in Equity (Continued)

Years ended December 31, 2021, 2022 and 2023

			Attributable to owners of the Controlling Company
(In millions of Korean won)	Notes		Share capital		Share premium		Retained earnings			Accumulated other comprehensive income			Other components of equity			Total			Non-controlling interest			Total equity
Balance as at January 1, 2023			￦	1,564,499	￦	1,440,258	￦	14,255,316		￦	(77,776	)	￦	(572,152	)	￦	16,610,145		￦	1,802,551		￦	18,412,696
Comprehensive income
Profit for the year				—		—		993,325			—			—			993,325			(21,143	)		972,182
Remeasurements of net defined benefit liabilities		17,29		—		—		(126,613	)		—			—			(126,613	)		(10,852	)		(137,465	)
Share of gain(loss) on remeasurements of associates and joint ventures				—		—		(118	)		—			—			(118	)		13			(105	)
Share of other comprehensive income of associates and joint ventures				—		—		—			15,775			—			15,775			5,820			21,595
Valuation loss on cash flow hedge		4,29		—		—		—			(22,252	)		—			(22,252	)		(361	)		(22,613	)
Gain(loss) on valuation of financial instruments at fair value through other comprehensive income		4,29		—		—		222			126,028			—			126,250			(4,445	)		121,805
Exchange differences on translation of foreign operations				—		—		—			10,632			—			10,632			13,598			24,230
Total comprehensive income for the year				—		—		866,816			130,183			—			996,999			(17,370	)		979,629
Transactions with owners
Dividends paid by the Controlling Company		31		—		—		(501,844	)		—			—			(501,844	)		—			(501,844	)
Dividends paid to non-controlling interest of subsidiaries				—		—		—			—			—			—			(24,964	)		(24,964	)
Acquisition and disposition of businesses				—		—		—			—			—			—			(79,134	)		(79,134	)
Changes in ownership interest in subsidiaries				—		—		—			—			216,841			216,841			128,526			345,367
Appropriations of loss on disposal of treasury stock				—		—		(44,421	)		—			44,421			—			—			—
Acquisition of treasury stock				—		—		—			—			(300,243	)		(300,243	)		—			(300,243	)
Disposal of treasury stock				—		—		—			—			4,463			4,463			—			4,463
Retirement of treasury stock				—		—		(100,000	)		—			100,000			—			—			—
Recognition of the obligation to purchase its own equity				—		—		—			—			(298,196	)		(298,196	)		—			(298,196	)
Others				—		—		—			—			2,448			2,448			2,352			4,800
Subtotal				—		—		(646,265	)		—			(230,266	)		(876,531	)		26,780			(849,751	)
Balance as at December 31, 2023			￦	1,564,499	￦	1,440,258	￦	14,475,867		￦	52,407		￦	(802,418	)	￦	16,730,614		￦	1,811,961		￦	18,542,575

The above consolidated statements of changes in equity should be read in conjunction with the accompanying notes.

F-12

KT Corporation and Subsidiaries

Consolidated Statements of Cash Flows

Years ended December 31, 2021, 2022 and 2023

(In millions of Korean won)
	Notes		2021			2022			2023
Cash flows from operating activities
Cash generated from operations		32	￦	5,829,607		￦	3,835,879		￦	5,747,195
Interest paid				(257,809	)		(263,520	)		(361,741	)
Interest received				272,061			307,091			360,614
Dividends received				74,441			68,827			60,987
Income tax paid				(356,466	)		(351,212	)		(303,766	)
Net cash inflow from operating activities				5,561,834			3,597,065			5,503,289
Cash flows from investing activities
Collection of loans				54,934			44,287			53,885
Loans granted				(54,128	)		(43,694	)		(37,771	)
Disposal of financial assets at fair value through profit or loss				609,849			1,298,621			90,487
Disposal of financial assets at amortized cost				690,457			1,046,115			1,543,663
Disposal of financial assets at fair value through other comprehensive income				244,994			97,932			306
Disposal of assets held-for-sale				—			4,600			—
Disposal of investments in associates and joint ventures				10,880			34,828			6,890
Acquisition of investments in associates and joint ventures				(487,828	)		(280,988	)		(106,389	)
Disposal of property and equipment, and investment properties				174,413			178,063			100,348
Acquisition of property and equipment, and investment properties				(3,495,021	)		(3,439,857	)		(3,692,972	)
Acquisition of financial assets at fair value through profit or loss				(753,907	)		(1,317,175	)		(220,989	)
Acquisition of financial assets at amortized cost				(623,924	)		(1,450,442	)		(1,875,525	)
Acquisition of financial assets at fair value through other comprehensive income				(131,674	)		(449,504	)		(10,267	)
Disposal of intangible assets				11,624			20,088			7,078
Disposal of right-of-use assets				318			97			529
Settlement of derivative assets and liabilities				—			—			4,888
Acquisition of intangible assets				(752,181	)		(545,190	)		(478,685	)
Acquisition of right-of-use assets				(4,261	)		(2,090	)		(1,065	)
Acquisition of businesses				(671,359	)		(41,088	)		(51,561	)
Disposal of businesses				39,340			6,754			46,642
Net cash outflow from investing activities				(5,137,474	)		(4,838,643	)		(4,620,508	)
Cash flows from financing activities		33
Proceeds from borrowings and debentures				2,899,567			4,234,570			5,381,231
Repayments of borrowings and debentures				(1,999,173	)		(2,843,249	)		(5,275,113	)
Settlement of derivative assets and liabilities, net				(1,496	)		35,083			48,183
Cash inflow from issuance of shares to NCI				67,693			125,066			632,776
Cash outflow from issuance of shares to NCI				(11,001	)		(28,848	)		(7,988	)
Cash inflow from other financing activities				2,556			2,193			2,082
Dividends paid to shareholders				(350,334	)		(476,800	)		(526,826	)
Acquisition of treasury stock				(193,626	)		—			(300,086	)
Cash outflow from other financing activities				(60,901	)		—			—
Repayment of leases liabilities				(394,567	)		(378,684	)		(407,051	)
Net cash outflow from financing activities				(41,282	)		669,331			(452,792	)
Effect of exchange rate change on cash and cash equivalents				1,890			1,717			503
Net increase (decrease) in cash and cash equivalents				384,968			(570,530	)		430,492
Cash and cash equivalents
Beginning of the year		5		2,634,624			3,019,592			2,449,062
End of the year		5	￦	3,019,592		￦	2,449,062		￦	2,879,554

The above consolidated statements of cash flows should be read in conjunction with the accompanying notes.

F-13

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

1. General Information

The consolidated financial statements have been prepared by KT Corporation, the “Controlling company” as defined under IFRS 10 Consolidated Financial Statements, by consolidating 84 subsidiaries (collectively referred to as the “Group”) including BC Card Co., Ltd., etc. as described in Note 1.2

1.1 The Controlling Company

KT Corporation (the “Controlling Company”) commenced operations on January 1, 1982, when it spun off from the Korea Communications Commission (formerly the Korean Ministry of Information and Communications) to provide telecommunication services and to engage in the development of advanced communications services under the Act of Telecommunications of Korea. The headquarters are located in Seongnam City, Gyeonggi Province, Republic of Korea, and the address of its registered head office is 90, Buljeong-ro, Bundang-gu, Seongnam City, Gyeonggi Province.

On October 1, 1997, upon the announcement of the Government-Investment Enterprises Management Basic Act and the Privatization Law, the Controlling Company became a government-funded institution under the Commercial Code of Korea.

On December 23, 1998, the Controlling Company’s shares were listed on the Korea Exchange.

On May 29, 1999, the Controlling Company issued 24,282,195 additional shares and issued American Depository Shares (ADS), which represents new shares and 20,813,311 government-owned shares, on the New York Stock Exchange. On July 2, 2001, additional ADS representing 55,502,161 government-owned shares were issued on the New York Stock Exchange.

In 2002, the Controlling Company acquired the entire government-owned shares in accordance with the Korean government’s privatization plan. As of December 31, 2023, the Korean government does not own any shares in the Controlling Company.

1.2 Consolidated Subsidiaries

(1) The consolidated subsidiaries as of December 31, 2022 and 2023, are as follows

			Controlling percentage ownership1 (%)
Subsidiary	Type of business	Location	December 31, 2022	December 31, 2023	Closing month
KT Linkus Co., Ltd.	Public telephone maintenance	Korea	92.4%	92.4%	December
KT Telecop Co., Ltd.	Security service	Korea	86.8%	86.8%	December
KT Alpha Co., Ltd. 5	Data communication	Korea	73.0%	73.0%	December
KT Service Bukbu Co., Ltd	Opening services of fixed line	Korea	67.3%	67.3%	December
KT Service Nambu Co., Ltd.	Opening services of fixed line	Korea	77.3%	77.3%	December
KT Commerce Inc.	B2C, B2B service	Korea	100.0%	100.0%	December
KT Strategic Investment Fund No.3	Investment fund	Korea	100.0%	100.0%	December
KT Strategic Investment Fund No.4	Investment fund	Korea	100.0%	100.0%	December
KT Strategic Investment Fund No.5	Investment fund	Korea	100.0%	100.0%	December
BC-VP Strategic Investment Fund No.1	Investment fund	Korea	100.0%	100.0%	December
BC Card Co., Ltd.	Credit card business	Korea	69.5%	69.5%	December

F-14

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

			Controlling percentage ownership1 (%)
Subsidiary	Type of business	Location	December 31, 2022	December 31, 2023	Closing month
VP Inc. 5	Payment security service for credit card, others	Korea	69.7%	72.2%	December
H&C Network	Call center for financial sectors	Korea	100.0%	100.0%	December
BC Card China Co., Ltd.	Software development and data processing	China	100.0%	100.0%	December
INITECH Co., Ltd. 5	Internet banking ASP and security solutions	Korea	61.3%	63.9%	December
Smartro Co., Ltd.	VAN (Value Added Network) business	Korea	64.5%	64.5%	December
KTDS Co., Ltd. 5	System integration and maintenance	Korea	95.6%	91.6%	December
KT M&S Co., Ltd.	PCS distribution	Korea	100.0%	100.0%	December
GENIE Music Corporation 2	Online music production and distribution	Korea	36.0%	36.0%	December
KT MOS Bukbu Co., Ltd. 5	Telecommunication facility maintenance	Korea	100.0%	100.0%	December
KT MOS Nambu Co., Ltd. 5	Telecommunication facility maintenance	Korea	98.4%	98.4%	December
KT Skylife 5	Satellite TV	Korea	50.2%	50.6%	December
Skylife TV Co., Ltd.	TV contents provider	Korea	100.0%	100.0%	December
KT Estate Inc.	Residential building development and supply	Korea	100.0%	100.0%	December
KT Investment Management Inc.	Asset management, real estate and consulting services	Korea	100.0%	100.0%	December
NEXR Co., Ltd.	Cloud system implementation	Korea	100.0%	100.0%	December
KTGDH Co., Ltd.	Data center development and related service	Korea	100.0%	100.0%	December
KT Sat Co., Ltd.	Satellite communication business	Korea	100.0%	100.0%	December
Nasmedia Co., Ltd. 2,5	Solution provider and IPTV advertisement sales business	Korea	44.0%	44.1%	December
KT Sports Co., Ltd.	Management of sports teams	Korea	100.0%	100.0%	December
KT Music Contents Fund No.2	Music and contents investment business	Korea	100.0%	100.0%	December
KTCS Corporation 2,5	Database and online information provider	Korea	34.1%	34.1%	December
KTIS Corporation 2,5	Database and online information provider	Korea	33.3%	33.3%	December
KT M Mobile Co., Ltd.	Special category telecommunications operator and sales of communication device	Korea	100.0%	100.0%	December
KT Investment Co., Ltd.	Financing business for new technology	Korea	100.0%	100.0%	December
PlayD Co., Ltd.	Advertising agency	Korea	70.4%	70.4%	December
Next Connect PFV	Residential building development and supply	Korea	100.0%	100.0%	December
KT Rwanda Networks Ltd.	Network installation and management	Rwanda	51.0%	51.0%	December
AOS Ltd.	System integration and maintenance	Rwanda	51.0%	51.0%	December
KT Japan Co., Ltd.	Foreign investment business and local counter work	Japan	100.0%	100.0%	December

F-15

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

			Controlling percentage ownership1 (%)
Subsidiary	Type of business	Location	December 31, 2022	December 31, 2023	Closing month
East Telecom LLC	Wireless/fixed line internet business	Uzbekistan	91.6%	91.6%	December
KT America, Inc.	Foreign investment business and local counter work	USA	100.0%	100.0%	December
PT. BC Card Asia Pacific	Software development and supply	Indonesia	99.9%	99.9%	December
KT Hongkong Telecommunications Co., Ltd.	Fixed line telecommunication business	Hong Kong	100.0%	100.0%	December
Korea Telecom Singapore Pte. Ltd.	Foreign investment business and local counter work	Singapore	100.0%	100.0%	December
Texnoprosistem LLC	Fixed line internet business	Uzbekistan	100.0%	100.0%	December
Nasmedia Thailand Co., Ltd.	Internet advertising solution	Thailand	99.9%	99.9%	December
KT Huimangjieum	Manufacturing	Korea	100.0%	100.0%	December
K-REALTY RENTAL HOUSING REIT 3	Residential building	Korea	88.6%	88.6%	December
Storywiz Co., Ltd.	Contents and software development and supply	Korea	100.0%	100.0%	December
KT Engineering Co., Ltd.	Telecommunication facility construction and maintenance	Korea	100.0%	100.0%	December
KT Studio Genie Co., Ltd.	Data communication service and data communication construction business	Korea	90.9%	90.9%	December
KHS Corporation	Operation and maintenance of facilities	Korea	100.0%	100.0%	December
Lolab Co., Ltd.	Truck transportation and trucking arrangement business	Korea	79.8%	79.8%	December
HCN Co., Ltd.	Cable television service	Korea	100.0%	100.0%	December
Millie Seojae 2	Book contents service	Korea	38.6%	30.2%	December
KT ES Pte. Ltd.	Foreign investment business	Singapore	57.6%	57.6%	December
Epsilon Global Communications PTE. Ltd.	Network service industry	Singapore	100.0%	100.0%	December
Epsilon Telecommunications (SP) PTE. Ltd.	Fixed line telecommunication business	Singapore	100.0%	100.0%	December
Epsilon Telecommunications (US) PTE. Ltd.	Fixed line telecommunication business	Singapore	100.0%	100.0%	December
Epsilon Telecommunications Limited	Fixed line telecommunication business	UK	100.0%	100.0%	December
Epsilon Telecommunications (HK) Limited	Fixed line telecommunication business	Hong Kong	100.0%	100.0%	December
Epsilon US Inc.	Fixed line telecommunication business	USA	100.0%	100.0%	December
Epsilon Telecommunications (BG) EOOD	Employee support service	Bulgaria	100.0%	100.0%	December
Nasmedia-KT Alpha Future Growth Strategic Investment Fund	Investment fund	Korea	100.0%	100.0%	December
KT Strategic Investment Fund 6	Investment fund	Korea	100.0%	100.0%	December
Altimedia Corporation	Software development and delivery	Korea	100.0%	100.0%	December
Altimidia B.V. (formerly Alticast B.V.)	Software development and delivery	Netherlands	100.0%	100.0%	December

F-16

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

			Controlling percentage ownership1 (%)
Subsidiary	Type of business	Location	December 31, 2022	December 31, 2023	Closing month
Altimidia Vietnam (formerly Alticast Company Limited)	Software development and delivery	Vietnam	100.0%	100.0%	December
BCCARD VIETNAM LTD.	Software sales business	Vietnam	100.0%	100.0%	December
KTP SERVICES INC.	Fixed line telecommunication business	Philippines	100.0%	100.0%	December
KT RUS LLC	Foreign investment business	Russia	100.0%	100.0%	December
Hangang Real Estate Investment Trust No. 24	Investment fund	Korea	75.0%	75.0%	December
KT DX Vietnam Company Limited	Software development	Vietnam	100.0%	100.0%	December
KT Cloud Co., Ltd.	Information and communications development	Korea	100.0%	92.7%	December
Pocheon Jeonggyori Development Co., Ltd.	Residential building development	Korea	80.9%	80.9%	December
PT CRANIUM ROYAL ADITAMA	Software development	Indonesia	67.0%	67.0%	December
Juice Inc. 3,5	Online information provider/Software development and delivery	Korea	41.2%	42.6%	December
open cloud lab Co., Ltd (formerly SPARK AND ASSOCIATES INC.)	IT consulting service and Telecommunication equipment sales	Korea	100.0%	100.0%	December
KD Living, Inc.	Residential building management	Korea	—	100.0%	December
KT HEALTHCARE VINA COMPANY LIMITED	Medical service	Vietnam	—	100.0%	December
K-Realty Qualified Private Real Estate Investment Trust No. 1 4	Real estate management	Korea	—	6.5%	December
AQUA RETAIL VIETNAM COMPANY LIMITED	E-voucher issuance and trading business	Vietnam	—	100.0%	December
K-Realty Qualified Private Real Estate Investment Trust No. 4	Real estate management	Korea	—	93.9%	December

1 Sum of the interests owned by the Controlling Company and subsidiaries.

2 Although the Controlling Company owns less than 50% interest in Nasmedia, Co., Ltd., KTCS Corporation and KTIS Corporation, Millie Seojae, and GENIE Music Corporation these entities are consolidated as the Controlling Company can exercise the majority of the voting rights in its decision-making process at all times considering voting patterns at previous shareholders’ meetings.

3 Although the Controlling Company owns less than 50% interest in, Juice Inc., this entity is consolidated as the Controlling Company holds the majority of the voting right based on an agreement with other investors.

4 Although the Controlling Company owns less than 50% interest in K-Realty Qualified Private Real Estate Investment Trust No. 1, these entities are consolidated by comprehensively considering the criteria for determining control, such as ‘power’, ‘variable profit’, and ‘relationship between power and variable profit’, rather than simply judging by the interests owned by the company.

5 The number of treasury stocks held by subsidiaries are deducted from the total number of shares when calculating the controlling percentage interest.

F-17

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

(2) Changes in Scope of Consolidation

Subsidiaries newly included and excluded in the consolidation during the year ended December 31, 2023:

Changes	Location	Name of subsidiary	Reason
Included	Korea	KD Living, Inc.	Transferred1
Included	Vietnam	KT HEALTHCARE VINA COMPANY LIMITED	Newly established
Included	Korea	K-Realty Qualified Private Real Estate Investment Trust No. 1	Transferred2
Included	Vietnam	AQUA RETAIL VIETNAM COMPANY LIMITED	Newly established
Included	Korea	K-Realty Qualified Private Real Estate Investment Trust No. 4	Newly established
Excluded	United Arab Emirates	Epsilon M E A General Trading LLC	Liquidated
Excluded	Korea	Alpha DX Solution Co., Ltd.	Merged
Excluded	Korea	KT Strategic Investment Fund No.2	Liquidated
Excluded	Korea	LS Marine Solution Co., Ltd. (formerly KT Submarine Co., Ltd.)	Excluded3
Excluded	Korea	KT-Michigan Global Contents Fund	Liquidated
Excluded	Russia	KT Primorye IDC LLC	Liquidated

1 The entity has been reclassified from a joint venture to a consolidated entity.

2 Although the Controlling Company owns less than 50% interest in K-Realty Qualified Private Real Estate Investment Trust No. 1, these entities are consolidated by comprehensively considering the criteria for determining control, such as ‘power’, ‘variable profit’, and ‘relationship between power and variable profit’, rather than simply judging by the interests owned by the company.

3 Due to the loss of control by the parent company, the entity has been reclassified from a subsidiary to an associate company.

F-18

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

(3) Summarized information for consolidated subsidiaries as at and for the years ended December 31, 2021, 2022 and 2023 is as follows

(In millions of Korean won)	December 31, 20213
	Total assets		Total liabilities		Operating revenues3		Profit (loss) for the year3
KT Linkus Co., Ltd	￦	54,219	￦	53,316	￦	81,434	￦	(3,095	)
KT Submarine Co., Ltd.		110,390		10,736		31,374		(3,183	)
KT Telecop Co., Ltd.		363,224		233,797		515,456		3,985
KT Alpha Co., Ltd. (KT Hitel Co., Ltd.)		390,671		172,767		471,870		(8,692	)
KT Service Bukbu Inc.		59,341		54,070		231,602		1,128
KT Service Nambu Inc.		62,513		52,695		271,174		1,430
BC Card Co., Ltd. 1		3,933,427		2,481,004		3,580,970		120,308
H&C Network Co., Ltd. 1		88,616		4,993		227,604		11,995
Nasmedia Co., Ltd. 1		490,394		268,618		125,876		27,120
KTDS Co., Ltd. 1		341,358		199,831		632,899		21,464
KT M&S Co., Ltd.		241,377		203,051		710,634		3,496
KT MOS Bukbu Co., Ltd.		32,511		25,402		70,212		1,637
KT MOS Nambu Co., Ltd.		36,741		26,053		71,940		2,016
KT Skylife Co., Ltd. 1		1,275,645		469,694		772,950		62,309
KT Estate Inc. 1		2,370,940		791,884		577,578		213,203
KTGDH Co., Ltd.		11,464		1,560		4,423		553
KT Sat Inc.		593,616		34,169		174,750		20,830
KT Sports Inc.		29,524		19,740		67,612		(2,039	)
KT Music Contents Fund No.2		14,985		278		253		(30	)
KT-Michigan Global Contents Fund		3,552		112		13,592		10,032
KT M Mobile Inc.		144,175		40,749		204,641		5,918
KT Investment Co., Ltd. 1		87,366		66,108		21,040		(697	)
KTCS Corporation 1		416,750		234,172		968,499		19,034
KTIS Corporation		369,361		177,619		487,801		24,944
Next Connect PFV Inc.		518,441		167,963		—		(6,519	)
KT Japan Co., Ltd. 1		1,474		2,633		1,298		(142	)
KT America, Inc.		4,884		101		6,508		201
KT Rwanda Networks Ltd. 2		125,860		236,389		23,328		(28,770	)
AOS Ltd. 2		11,539		2,812		6,942		823
KT Hong Kong Telecommunications Co., Ltd.		6,613		1,346		18,825		1,313
KT Hopemate 1		6,311		2,978		12,538		116
KT Engineering Co., Ltd. (KT ENGCORE Co., Ltd.)		185,850		144,832		284,998		366
KT Studio Genie Co., Ltd. 1,		648,534		276,933		90,047		(16,443	)
Lolab Co., Ltd.		26,726		897		2,107		(134	)
East Telecom LLC 1		35,904		22,088		11,960		2,487
KT ES Pte. Ltd. 1		240,331		80,597		15,157		(6,355	)
KT Philippines		3,641		1,243		—		—
Altimedia Corporation 1		32,338		9,742		6,968		1,037

1 These companies are the intermediate controlling companies of other subsidiaries and the above financial information is from their consolidated financial statements.

2 Convertible preferred stock issued by subsidiaries as of the end of the reporting period is included in liabilities.

3 Profit or loss is included from the date of acquisition of control to the end of the reporting period.

F-19

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

(in millions of Korean won)	December 31, 20223
	Total assets		Total liabilities		Operating revenues3		Profit (loss) for the year3
KT Linkus Co., Ltd.	￦	47,734	￦	47,498	￦	76,135	￦	(614	)
KT Submarine Co., Ltd.		120,255		7,884		42,848		(12,126	)
KT Telecop Co., Ltd.		370,004		230,965		517,406		4,267
KT Alpha Co., Ltd. 1 (KT Hitel Co., Ltd.)		406,236		172,211		516,737		13,115
KT Service Bukbu Co., Ltd.		74,673		65,820		252,304		3,227
KT Service Nambu Co., Ltd.		80,450		66,479		301,720		3,067
BC Card Co., Ltd. 1		5,666,075		4,109,200		3,897,090		148,341
H&C Network		82,737		6,640		27,392		992
Nasmedia Co., Ltd. 1		516,945		275,730		153,210		27,691
KTDS Co., Ltd. 1		401,932		228,474		723,161		30,941
KT M&S Co., Ltd.		255,310		204,336		730,802		8,105
KT MOS Bukbu Co., Ltd.		38,684		22,553		83,085		4,607
KT MOS Nambu Co., Ltd.		42,011		25,416		83,330		5,035
KT Skylife Co., Ltd. 1		1,359,166		503,679		1,038,468		20,941
KT Estate Inc. 1		2,480,333		833,842		478,188		58,780
KT GDH Co., Ltd.		12,059		1,596		4,323		451
KT Sat Co., Ltd.		677,980		89,644		185,313		28,073
KT Sports Co., Ltd.		28,220		15,461		65,350		(7,302	)
KT Music Contents Fund No.2		15,718		277		1,040		735
KT-Michigan Global Content Fund		2,371		27		33		(1,095	)
KT M Mobile Co., Ltd.		152,114		49,816		262,918		4,731
KT Investment Co., Ltd. 1		103,354		79,182		15,136		2,840
KTCS Corporation 1		419,726		228,618		1,031,010		17,634
KTIS Corporation		396,208		199,204		536,229		15,917
Next Connect PFV		624,734		277,967		3		(3,712	)
KT Japan Co., Ltd. 1		1,888		3,141		3,263		226
KT America, Inc.		5,945		843		8,070		37
KT Rwanda Networks Ltd. 2		126,721		267,369		30,834		(27,467	)
AOS Ltd. 2		10,972		905		8,049		1,274
KT Hong Kong Telecommunications Co., Ltd.		10,505		4,768		20,413		51
KT Huimangjieum 1		6,984		2,582		22,860		494
KT Engineering Co., Ltd. (KT ENGCORE Co., Ltd.)		141,463		89,853		258,435		10,302
KT Studio Genie Co., Ltd. 1		987,270		268,911		723,580		189,498
Lolab Co., Ltd.		35,091		17,247		74,881		(7,985	)
East Telecom LLC 1		42,691		21,645		27,030		6,419
KT ES Pte. Ltd. 1		240,721		88,640		78,815		(23,957	)
KTP SERVICES INC.		3,832		2,044		776		(255	)
Altimedia Corporation 1		44,861		15,777		47,203		6,035
KT RUS LLC 1		967		16		5		(871	)
KT DX Vietnam Company Limited		1,815		6		—		26
kt cloud Co., Ltd. 1		1,348,684		245,872		432,118		14,712

1 These companies are the intermediate controlling companies of other subsidiaries and the above financial information is from their consolidated financial statements.

2 Convertible preferred stock issued by subsidiaries as of the end of the reporting period is included in liabilities.

3 Profit or loss is included from the date of acquisition of control to the end of the reporting period.

F-20

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

(in millions of Korean won)	December 31, 20233
	Total assets		Total liabilities		Operating revenues		Profit (loss) for the year
KT Linkus Co., Ltd.	￦	64,178	￦	63,452	￦	81,645	￦	821
KT Telecop Co., Ltd.		375,596		235,947		527,015		5,728
KT Alpha Co., Ltd.		443,639		191,254		437,308		19,352
KT Service Bukbu Co., Ltd.		63,760		55,360		242,119		1,212
KT Service Nambu Co., Ltd.		71,576		58,745		291,170		1,354
BC Card Co., Ltd. 1		6,352,878		4,722,432		4,027,450		76,545
H&C Network		81,107		4,863		27,205		1,814
Nasmedia Co., Ltd. 1		513,311		262,336		147,934		17,703
KTDS Co., Ltd. 1		393,667		202,067		727,477		33,971
KT M&S Co., Ltd.		258,477		209,075		695,856		3,783
KT MOS Bukbu Co., Ltd.		50,750		28,431		101,428		8,457
KT MOS Nambu Co., Ltd.		46,839		26,012		101,422		5,749
KT Skylife Co., Ltd. 1		1,220,842		479,369		1,034,342		(109,407	)
KT Estate Inc. 1		2,746,546		1,121,970		511,018		871
KT GDH Co., Ltd.		7,760		1,501		4,346		648
KT Sat Co., Ltd.		699,607		88,524		182,274		30,502
KT Sports Co., Ltd.		26,615		11,299		66,309		(12,386	)
KT Music Contents Fund No.2		5,558		1,772		534		(992	)
KT M Mobile Co., Ltd.		176,838		69,317		301,049		5,605
KT Investment Co., Ltd. 1		83,638		57,420		24,976		2,180
KTCS Corporation 1		434,900		234,850		1,035,911		15,804
KTIS Corporation		447,609		243,519		593,162		13,922
Next Connect PFV		946,687		629,809		—		(29,889	)
KT Japan Co., Ltd. 1		2,015		3,341		2,793		(110	)
KT America, Inc.		6,013		701		8,928		133
KT Rwanda Networks Ltd. 2		134,847		313,787		26,788		(57,628	)
AOS Ltd. 2		10,763		1,983		8,287		128
KT Hong Kong Telecommunications Co., Ltd.		11,142		5,121		19,373		143
KT Huimangjieum 1		8,073		2,715		17,687		1,012
KT Engineering Co., Ltd.		160,243		104,005		262,063		5,327
KT Studio Genie Co., Ltd. 1		989,187		259,413		542,955		13,507
Lolab Co., Ltd.		42,744		37,838		173,035		(12,938	)
East Telecom LLC 1		48,483		22,632		30,350		7,723
KT ES Pte. Ltd. 1		117,009		90,392		87,865		(124,850	)
KTP SERVICES INC.		2,967		919		671		235
Altimedia Corporation 1		48,381		12,374		45,035		7,352
KT RUS LLC		501		10		1		(378	)
KT DX Vietnam Company Limited		1,694		102		82		(207	)
KT Cloud Co., Ltd. 1		1,983,972		503,241		679,825		63,956
KT Healthcare Vina Co., Ltd.		12,730		439		—		(721	)
K-Realty Qualified Private Real Estate Investment Trust No. 1		80,266		50,693		4,682		(1,037	)
AQUA RETAIL VIETNAM COMPANY LIMITED		1,202		62		16		(248	)

1 These companies are the intermediate controlling companies of other subsidiaries and the above financial information is from their consolidated financial statements.

2 Convertible preferred stock issued by subsidiaries as of the end of the reporting period is included in liabilities.

3 Profit or loss is included from the date of acquisition of control to the end of the reporting period.

F-21

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

2 Material Accounting Policies

The principal accounting policies applied in the preparation of these consolidated financial statements are set out below. These policies have been consistently applied to all the years presented, unless otherwise stated.

2.1 Basis of Preparation

The consolidated financial statements of the Group have been prepared in accordance with International Financial Reporting Standards (“IFRS”) as issued by the International Accounting Standards Board (“IASB”).

The financial statements have been prepared on a historical cost basis, except for the following:

• Certain financial assets and liabilities (including derivative instruments)

• Defined benefit pension plans – plan assets measured at fair value

The preparation of the consolidated financial statements requires the use of critical accounting estimates. Management also needs to exercise judgement in applying the Group’s accounting policies. The areas involving a higher degree of judgment or complexity, or areas where assumptions and estimates are significant to the consolidated financial statements are disclosed in Note 3.

2.2 Changes in Accounting Policy and Disclosures

(a) New and amended standards and interpretations adopted by the Group

The Group has applied the following standards and interpretations for the first time for their annual reporting period commencing January 1, 2023.

- IFRS 17 ‘Insurance Contract’ (Amendment)

IFRS 17, which replaces IFRS 4 “Insurance Contracts,” establishes principles for recognition, measurement, and disclosure of insurance contracts, and is mainly characterized by measuring the current cost of insurance liabilities, recognizing insurance returns based on accrual accounting assumption, and marking the distinction between insurance gains and losses on investment.

The Group does not have any contracts that meet the definition of an insurance contract under IFRS 17.

- IAS 1 Presentation of Financial Statements and IFRS Practice Statement 2 Making Materiality Judgements – Disclosure of Accounting Policies (Amendment)

The amendments change the requirements in IAS 1 with regard to disclosure of accounting policies. The amendments replace all instances of the term ‘significant accounting policies’ with ‘material accounting policy information’. Accounting policy information is material if, when considered together with other information included in an entity’s financial statements, it can reasonably be expected to influence decisions that the primary users of general purpose financial statements make on the basis of those financial statements.

F-22

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

The supporting paragraphs in IAS 1 are also amended to clarify that accounting policy information that relates to immaterial transactions, other events or conditions is immaterial and need not be disclosed. Accounting policy information may be material because of the nature of the related transactions, other events or conditions, even if the amounts are immaterial. However, not all accounting policy information relating to material transactions, other events or conditions is itself material.

The IASB has also developed guidance and examples to explain and demonstrate the application of the ‘four-step materiality process’ described in IFRS Practice Statement 2.

- IAS 1 Presentation of Financial Statements – Disclosure of financial liabilities with condition to adjust exercise price (Amendment)

The amendments require disclosure of valuation gains or losses (limited to those recognized in the profit or loss) of the conversion options or warrants (or financial liabilities including them), if all or part of the financial instrument with exercise price that is adjusted depending on the issuer’s share price change is classified as financial liability as defined in paragraph of IAS 32 – Financial Instrument: Presentation.

- IAS 8 Accounting Polices, Changes in Accounting Estimates and Errors – Definition of Accounting Estimates (Amendment)

The amendments replace the definition of a change in accounting estimates with a definition of accounting estimates. Under the new definition, accounting estimates are “monetary amounts in financial statements that are subject to measurement uncertainty”. The definition of a change in accounting estimates was deleted.

- IAS 12 Income Taxes – Deferred Tax related to Assets and Liabilities arising from a Single Transaction (Amendment)

The amendments introduce a further exception from the initial recognition exemption. Under the amendments, an entity does not apply the initial recognition exemption for transactions that give rise to equal taxable and deductible temporary differences.

Depending on the applicable tax law, equal taxable and deductible temporary differences may arise on initial recognition of an asset and liability in a transaction that is not a business combination and affects neither accounting nor taxable profit. For example, this may arise upon recognition of a lease liability and the corresponding right-of-use asset applying IFRS 16 at the commencement date of a lease.

Following the amendments to IAS 12, an entity is required to recognise the related deferred tax asset and liability, with the recognition of any deferred tax asset being subject to the recoverability criteria in IAS 12.

- IAS 12 Income Taxes – International Tax Reform: Pillar 2 Best Regulations (Amendment)

The amendment clarifies that IAS 12 Income Taxes’ is applied to corporations arising from tax laws enacted or practically enacted to implement the Pillar 2 best rules issued by the Organization for Economic Cooperation and Development (OECD).

F-23

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

However, by introducing a temporary exception to the deferred tax accounting requirements of IAS 12 Income Taxes, the group does not recognize deferred tax assets and liabilities associated with Pillar 2 Income Taxes and do not disclose information about them. The group also discloses that the exception has been applied in accordance with this amendment, and that the current income tax expense (revenue) related to Pillar 2 corporate tax is disclosed separately.

There is no significant impact of the amendments listed above on the consolidated financial statements.

(b) New standards and interpretations not yet adopted by the Group

The following new accounting standards and interpretations that have been published are not mandatory for December 31, 2023 reporting periods and have not been early adopted by the Group.

- IAS 1 Presentation of Financial Statements – Classification of Liabilities as Current or Non-current (Amendment to 2020)

The amendments clarify that the classification of liabilities as current and non-current is based on rights that are existing at the end of the reporting period, specify that classification is unaffected by expectations about whether an entity will exercise its right to defer settlement of a liability, explain that rights are in existence if covenants are complied with at the end of the reporting period, and introduce a definition of ‘settlement’ to make clear that settlement refers to the transfer to the counterparty of cash, equity instruments, other assets or services.

- IAS 1 Presentation of Financial Statements – Non-current liabilities with agreements (Amendment to 2023)

The amendments regulate that only certain conditions in the borrowing arrangement (referred to as the “Agreement”) that must be observed before the end of the reporting period affect the right of the entity to defer repayment of the liability for at least 12 months after the reporting period. Even if compliance with the agreement is assessed only after the reporting period, these arrangements affect the existence of the right as of the end of the reporting period.

It also regulates that arrangements that must be observed only after the reporting period do not affect the right to defer settlement. However, if the Group’s right to defer settlement of a liability depends on the agreement that complies with within 12 months of the reporting period, disclosing the information to help users of financial statements understand the risk that the liability could be repaid within 12 months of the reporting period. This information includes information about the agreements (including the nature of the agreements, when the Group is required to comply), the carrying amount of the relevant liabilities, and the facts and circumstances indicating that they may be difficult to satisfying with.

The above amendments are applied retrospectively for annual reporting periods beginning on or after 1 January 2024, with early application permitted.

- IAS 7 ‘Cash Flow Statement’ and ‘Financial Instruments Disclosure’- Supplier Financial Agreement(Amendment)

F-24

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

The amendment adds the purpose of disclosure in IAS 7 ‘Cash Flow Statement’, users of financial statements should disclose information about supplier financial agreements so that they can assess the affect of them on the Group’s liabilities and cash flows. In addition, supplier financial agreements were added as an example of the requirement to amend IAS 7 to disclose information about exposure to liquidity risk concentration.

The term ‘supplier financial agreements’ is not defined; instead, the amendment presents the nature of the arrangement that should be informed.

For achieving the purpose of disclosure, the following information on supplier financial agreements must be disclosed in an integrated manner.

• the terms and conditions of an agreement

• The carrying amount of financial liabilities corresponding to the supplier’s financial agreement and the items displayed in the statement of financial position in relation to the financial liabilities

• The carrying amount corresponding to the portion of the financial liabilities that the supplier has already received from the financial provider and the items displayed in the statement of financial position in relation to the financial liabilities

• The scope of payment date for financial liabilities corresponding to supplier financial agreements and the scope of payment date for comparable purchase liabilities not corresponding to supplier financial agreements

• Types of non-cash changes in the carrying amount of financial liabilities corresponding to supplier financial agreements and their impact

• Liquidity risk information

The above amendments are applied retrospectively for annual reporting periods beginning on or after 1 January 2024, with early application permitted.

- IFRS 16 ‘Lease’ – Lease liabilities arising from leaseback (Amendment)

The amendment adds a follow-up measurement requirement for leaseback that is accounted for as sales by applying IFRS 15 ‘revenue from contracts with customers’. The amendment requires the seller to calculate a ‘lease fee’ or an ‘modified lease fee’ in such a way that the seller-less user does not recognize any difference or gain for the right to use that the seller-less user continues to hold after the lease commencement date.

The above amendments are applied retrospectively for annual reporting periods beginning on or after 1 January 2024, with early application permitted.

- IAS 1 Presentation of Financial Statements (revised in 2023) – Disclosure of Virtual Assets

The amendments, in addition to the disclosure requirements required by other Standards for transactions related to virtual assets, define the requirements for disclosure in each case: 1) holding virtual assets; 2) holding virtual assets on behalf of customers; and 3) issuing virtual assets.

F-25

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

If a virtual asset is held, information on the general information of the virtual asset, the applied accounting policy, the acquisition path, acquisition cost, and fair value of each virtual asset should be disclosed. In addition, when a virtual asset is issued, the performance status related to the issued virtual asset, the moment and the exposure of revenue recognition of the sold virtual asset, the quantity of virtual assets held after issuance, and important contract details should be disclosed.

The above amendments are applied retrospectively for annual reporting periods beginning on or after 1 January 2024, with early application permitted.

- IFRS 18 Presentation and Disclosure in financial statements (Amendment)

The purpose of the amendment is to set out requirements for the presentation and disclosure of information in general purpose financial statements (financial statements) to help ensure they provide relevant information that faithfully represents an entity’s assets, liabilities, equity, income and expenses. IFRS 18 applies to all financial statements that are prepared and presented in accordance with International Financial Reporting Standards and replaces IAS 1 Presentation of Financial Statements. The key changes included in the amendments include (1) an introduction of a defined structure for the statement of profit or loss including categories for classifying incomes and expenses, subtotals for operating profit and profit before financing and income taxes, (2) an introduction of specific disclosure requirements related to the statement of profit or loss which include but are not limited to management-defined performance measures, (3) enhanced guidance on the principles of aggregation and disaggregation which focus on grouping items based on their shared characteristics and (4) some other limited changes to presentation and disclosures in the financial statements.

The above amendments are applied retrospectively for annual reporting periods beginning on or after 1 January 2027, with early application permitted.

The Group is reviewing the impact of the above-listed amendments on the consolidated financial statements.

2.3 Consolidation

The Group has prepared the consolidated financial statements in accordance with IFRS 10 Consolidated Financial Statements.

(a) Subsidiaries

Subsidiaries are all entities (including special purpose entities (“SPEs”)) over which the Group has control. The Group controls an entity when the Group is exposed to, or has rights to, variable returns from its involvement with the entity and has the ability to affect those returns through its power to direct the activities of the entity. Subsidiaries are fully consolidated from the date on which control is transferred to the Group. They are deconsolidated from the date that control ceases.

The acquisition method of accounting is used to account for business combinations by the Group. The consideration transferred is measured at the fair values of the assets transferred, and identifiable assets acquired, and liabilities and contingent liabilities assumed in a business combination are measured initially at their fair values at the acquisition date. The Group recognizes any non-controlling interest in the acquired entity on an acquisition-by-acquisition basis

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Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

either at fair value or at the non-controlling interest’s proportionate share of the acquired entity’s net identifiable assets. All other non-controlling interests are measured at fair values, unless otherwise required by other standards. Acquisition-related costs are expensed as incurred.

The excess of consideration transferred, amount of any non-controlling interest in the acquired entity and acquisition-date fair value of any previous equity interest in the acquired entity over the fair value of the net identifiable assets acquired is recoded as goodwill. If those amounts are less than the fair value of the net identifiable assets of the business acquired, the difference is recognized directly in the profit or loss as a bargain purchase.

Intercompany transactions, balances and unrealized gains on transactions among group companies are eliminated. Unrealized losses are also eliminated unless the transaction provides evidence of an impairment of the transferred asset. Accounting policies of subsidiaries have been changed where necessary to ensure consistency with the policies adopted by the Group.

(b) Changes in ownership interests in subsidiaries without loss of control

Any differences between the amount of the adjustment to non-controlling interest that do not result in loss of control and any consideration paid or received is recognized in a separate reserve within equity attributable to owners of the Controlling Company.

(c) Disposal of subsidiaries

When the Group ceases to have control over a subsidiary, any retained interest in the subsidiary is remeasured to its fair value with the change in carrying amount recognized in profit or loss.

(d) Associates

Associates are entities over which the Group has significant influence but does not possess control or joint control. Investments in associates are accounted for using the equity method of accounting, after initially being recognized at cost. Unrealized gains on transactions between the Group and its associates are eliminated to the extent of the Group’s interest in the associates. If the Group’s share of losses of an associate equals or exceeds its interest in the associate (including long-term interests that, in substance, form part of the Group’s net investment in the associate), the Group discontinues recognizing its share of further losses. After the Group’s interest is reduced to zero, additional losses are provided for, and a liability is recognized, only to the extent that the Group has incurred legal or constructive obligations or made payments on behalf of the associate. If there is an objective evidence of impairment for the investment in the associate, the Group recognizes the difference between the recoverable amount of the associate and its book amount as impairment loss. If an associate uses accounting policies other than those of the Group for transactions and events in similar circumstances, if necessary, adjustments shall be made to make the associate’s accounting policies conform to those of the Group when the associate’s financial statements are used by the Group in applying the equity method.

(e) Joint arrangements

A joint arrangement, wherein two or more parties have joint control, is classified as either a joint operation or a joint venture. A joint operator recognizes its direct right to the assets, liabilities,

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KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

revenues, and expenses of joint operations and its share of any jointly held or incurred assets, liabilities, revenues, and expenses. A joint venture has rights to the net assets relating to the joint venture and accounts for that investment using the equity method.

2.4 Segment Reporting

Information of each operating segment is reported in a manner consistent with the business segment reporting provided to the chief operating decision-maker (Note 34). The chief operating decision-maker is responsible for allocating resources and assessing performance of the operating segments.

2.5 Foreign Currency Translation

(a) Functional and presentation currency

Items included in the financial statements of each of the Group’s entities are measured using the currency of the primary economic environment in which each entity operates (the “functional currency”). The consolidated financial statements are presented in Korean won, which is the Controlling Company’s functional and presentation currency.

(b) Transactions and balances

Foreign currency transactions are translated into the functional currency using the exchange rates at the dates of the transactions. Foreign exchange gains and losses resulting from the settlement of such transactions and from the translation of monetary assets and liabilities denominated in foreign currencies at year end exchange rates are generally recognized in profit or loss. They are deferred in other comprehensive income if they relate to qualifying cash flow hedges and qualifying effective portion of net investment hedges, or are attributable to monetary part of the net investment in a foreign operation.

Foreign exchange gains and losses that relate to financial instruments are presented in the statement of profit or loss, within finance costs. All other foreign exchange gains and losses are presented in the statement of profit or loss within ‘other income’ or ‘other expense’.

Non-monetary items that are measured at fair value in a foreign currency are translated using the exchange rates at the date when the fair value was determined. Translation differences on assets and liabilities carried at fair value are reported as part of the fair value gain or loss. For example, translation differences on non-monetary assets and liabilities, such as equities held at fair value through profit or loss, are recognized in profit or loss as part of the fair value gain or loss and translation differences on non-monetary assets, such as equities classified as available-for-sale financial assets, are recognized in other comprehensive income.

2.6 Financial Assets

(a) Classification

The Group classifies its financial assets in the following measurement categories:

• those to be measured at fair value through profit or loss

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KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

• those to be measured at fair value through other comprehensive income

• those to be measured at amortized cost

The classification depends on the Group’s business model for managing the financial assets and the contractual terms of the cash flows.

For financial assets measured at fair value, gains and losses will either be recorded in profit or loss or other comprehensive income. For investments in debt instruments, this will depend on the business model in which the investment is held. The Group reclassifies debt investments when, and only when, its business model for managing those assets changes.

For investments in equity instruments that are not held for trading, this will depend on whether the Group has made an irrevocable election at the time of initial recognition to account for the equity investment at fair value through other comprehensive income. Changes in fair value of the investments in equity instruments that are not accounted for as other comprehensive income are recognized in profit or loss.

(b) Measurement

At initial recognition, the Group measures a financial asset at its fair value plus, in the case of a financial asset not at fair value through profit or loss, transaction costs that are directly attributable to the acquisition of the financial asset. Transaction costs of financial assets carried at fair value through profit or loss are expensed in profit or loss.

Financial assets with embedded derivatives are considered in their entirety when determining whether their cash flows are solely payment of principal and interest.

A. Debt instruments

Subsequent measurement of debt instruments depends on the Group’s business model for managing the asset and the cash flow characteristics of the asset. The Group classifies its debt instruments into one of the following three measurement categories:

• Amortized cost: Assets that are held for collection of contractual cash flows where those cash flows represent solely payments of principal and interest are measured at amortized cost. A gain or loss on a debt investment that is subsequently measured at amortized cost and is not part of a hedging relationship is recognized in profit or loss when the asset is derecognized or impaired. Interest income from these financial assets is included in ‘finance income’ using the effective interest rate method.

• Fair value through other comprehensive income: Assets that are held for collection of contractual cash flows and for selling the financial assets, where the assets’ cash flows represent solely payments of principal and interest, are measured at fair value through other comprehensive income. Movements in the carrying amount are taken through other comprehensive income, except for the recognition of impairment loss (and reversal of impairment loss), interest income and foreign exchange gains and losses which are recognized in profit or loss. When the financial asset is derecognized, the cumulative gain or loss previously recognized in other comprehensive income is reclassified from equity to profit or loss. Interest income from these financial assets is included in ‘finance income’

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KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

using the effective interest rate method. Foreign exchange gains and losses are presented in ‘finance income’ or ‘finance costs’ and impairment loss in ‘finance costs’ or ‘operating expenses’.

• Fair value through profit or loss: Assets that do not meet the criteria for amortized cost or fair value through other comprehensive income are measured at fair value through profit or loss. A gain or loss on a debt investment that is subsequently measured at fair value through profit or loss and is not part of a hedging relationship is recognized in profit or loss and presented net in the statement of profit or loss within ‘finance income’ or ‘finance costs’ in the period in which it arises.

B. Equity instruments

The Group subsequently measures all equity investments at fair value. Where the Group’s management has elected to present fair value gains and losses on equity investments in other comprehensive income, there is no subsequent reclassification of fair value gains and losses to profit or loss following the derecognition of the investment. Dividend income from such investments continue to be recognized in profit or loss as ‘finance income’ when the Group’s right to receive payments is established.

Changes in the fair value of financial assets at fair value through profit or loss are recognized in ‘finance income’ or ‘finance costs’ in the statement of profit or loss as applicable. Impairment loss (reversal of impairment loss) on equity investments, measured at fair value through other comprehensive income, are not reported separately from other changes in fair value.

(c) Impairment

The Group assesses on a forward-looking basis the expected credit losses associated with its debt instruments carried at amortized cost and fair value through other comprehensive income. The impairment methodology applied depends on whether there has been a significant increase in credit risk. For trade receivables and lease receivables, the Group applies the simplified approach, which requires expected lifetime credit losses to be recognized from initial recognition of the receivables.

(d) Recognition and derecognition

Regular way purchases and sales of financial assets are recognized or derecognized on trade-date, the date on which the Group commits to purchase or sell the asset. Financial assets are derecognized when the rights to receive cash flows from the financial assets have expired or have been transferred and the Group has transferred substantially all the risks and rewards of ownership.

If a transfer does not result in derecognition because the Group has retained substantially all the risks and rewards of ownership of the transferred asset, the Group continues to recognize the transferred asset in its entirety and recognizes a financial liability for the consideration received.

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KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

(e) Offsetting of financial instruments

Financial assets and liabilities are offset and the net amount reported in the statements of financial position where there is a legally enforceable right to offset the recognized amounts and there is an intention to settle on a net basis or realize the assets and settle the liability simultaneously. The legally enforceable right must not be contingent on future events and must be enforceable in the normal course of business and in the event of default, insolvency or bankruptcy of the Group or the counterparty.

2.7 Derivative Instruments

Derivatives are initially recognized at fair value on the date a derivative contract is entered into and are subsequently remeasured to their fair value at the end of each reporting period. The accounting treatment for subsequent changes in fair value depends on whether the derivative is designated as a hedging instrument, and if so, the nature of the item being hedged. The Group has hedge relationships and designates certain derivatives as:

• hedges of a particular risk associated with the cash flows of recognized assets and liabilities and highly probable forecast transactions (cash flow hedges)

At inception of the hedge relationship, the Group documents the economic relationship between hedging instruments and hedged items including whether changes in the cash flows of the hedging instruments are expected to offset changes in the cash flows of hedged items.

The fair values of derivative financial instruments designated in hedge relationships are disclosed in Note 37.

The full fair value of a hedging derivative is classified as a non-current asset or liability when the remaining maturity of the hedged item is more than 12 months; it is classified as a current asset or liability when the remaining maturity of the hedged item is less than 12 months. A non-derivative financial asset and a non-derivative financial liability is classified as a current or non-current based on its expected maturity and its settlement, respectively.

The effective portion of changes in fair value of derivatives that are designated and qualify as cash flow hedges is recognized in the cash flow hedge reserve within equity to the limit of the cumulative change in fair value (present value) of the hedge item (the present value of the cumulative change in the future expected cash flows of the hedged item) from the inception of the hedge. The ineffective portion is recognized in ‘finance income (costs)’.

Amounts of changes in fair value of effective hedging instruments accumulated in equity are recognized as ‘finance income (costs)’ for the periods when the corresponding transactions affect profit or loss.

When a hedging instrument expires, or is sold, terminated, exercised, or when a hedge no longer meets the criteria for hedge accounting, any accumulated cash flow hedge reserve at that time remains in equity until the forecast transaction occurs, resulting in the recognition of a non-financial asset such as inventory. When the forecast transaction is no longer expected to occur, the cash flow hedge reserve and deferred costs of hedging that were reported in equity are immediately reclassified to profit or loss.

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KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

2.8 Trade Receivables

Trade receivables are recognized initially at the amount of consideration that is unconditional, unless they contain significant financing components when they are recognized at fair value. Trade receivables are subsequently measured at amortized cost using the effective interest method, less loss allowance. See Note 6 for further information about the Group’s accounting treatment for trade receivables and Note 2.6 (c) for a description of the Group’s accounting policy on impairment.

2.9 Inventories

Inventories are stated at the lower of cost and net realizable value. Cost is determined using the moving average method, except for inventories in-transit (specific identification method).

2.10 Property and Equipment

Property and equipment are stated at historical cost less accumulated depreciation and accumulated impairment losses. Historical cost includes expenditures that is directly attributable to the acquisition of the items.

Depreciation of all property and equipment, except for land, is calculated using the straight-line method to allocate their cost, net of their residual values, over their estimated useful lives as follows:

	Useful Life
Buildings	5 – 40 years
Structures	5 – 40 years
Machinery and equipment (Telecommunications equipment and others)	2 – 40 years
Vehicles	4 – 10 years
Tools	2 – 6 years
Office equipment	2 – 8 years

The depreciation method, residual values, and useful lives of property and equipment are reviewed at the end of each reporting period and, if appropriate, accounted for as changes in accounting estimates.

2.11 Investment Property

Real estate held for rental income or investment gains is classified as investment property and right-of-use asset. An investment property is measured initially at its cost. After recognition as an asset, investment property is carried at cost less accumulated depreciation and impairment losses. Investment property, except for land, is depreciated using the straight-line method over their useful lives from 5 to 40 years.

2.12 Intangible Assets

(a) Goodwill

Goodwill is measured as explained in Note 2.3 (a) and goodwill arising from acquisition of subsidiaries and businesses is included in intangible assets. Goodwill is tested annually for

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KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

impairment and carried at cost less accumulated impairment losses. Gains and losses on the disposal of subsidiaries and business include the carrying amount of goodwill relating to the subsidiaries and businesses sold.

For the purpose of impairment testing, goodwill acquired in a business combination is allocated to each of the CGUs, or group of CGUs, that is expected to benefit from the synergies of the combination. Goodwill is monitored at the operating segment level.

(b) Intangible assets excluding goodwill

Intangible assets, except for goodwill, are initially recognized at its historical cost, and carried at cost less accumulated amortization and accumulated impairment losses. Membership rights (condominium membership and golf membership), subscription rights, broadcast license, facility-use rights, and transportation rights that have indefinite useful life are not subject to amortization because there is no foreseeable limit to the period over which the assets are expected to be utilized. The Group amortizes intangible assets with a limited useful life using the straight-line method over the following periods:

	Useful Life
Development costs		3 – 10 years
Software		3 – 10 years
Frequency usage rights		5 – 10 years
Others1		1 – 50 years

1  Membership rights (condominium membership and golf membership), subscription rights, broadcast license, facility usage rights and transportation license included in others are classified as intangible assets with indefinite useful life.

2.13 Borrowing Costs

General and specific borrowing costs that are directly attributable to the acquisition, construction or production of a qualifying asset are capitalized during the period of time that is required to complete and prepare the asset for its intended use or sale. Investment income earned on the temporary investment of specific borrowings on qualifying assets is deducted from the borrowing costs eligible for capitalization. Other borrowing costs are expensed in the period in which they are incurred.

2.14 Government Grants

Grants from the government are recognized at their fair value where there is a reasonable assurance that the grant will be received and the Group will comply with all attached conditions. Government grants related to assets are presented in the statement of financial position by setting up the grant as deferred income that is recognized in profit or loss on a systematic basis over the useful life of the asset. Grants related to income are deferred and are presented as a credit in the statement of profit or loss within ‘other income’.

2.15 Impairment of Non-Financial Assets

Goodwill and intangible assets with indefinite useful life are tested annually for impairment at the end of each reporting period. If certain assets are deemed to be impaired, their recoverable

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KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

amount is estimated in order to determine the impairment loss. The Group estimates the recoverable amount for each asset, and, in cases when the recoverable amount cannot be estimated for an asset, the recoverable amount of the cash generating unit to which the asset belongs is estimated. Corporate assets are allocated to individual cash generating units on a reasonable and consistent basis and if they cannot be allocated to individual cash generating units, they are allocated to the smallest group of cash generating units on a reasonable and consistent basis. An impairment loss is recognized for the amount by which the asset’s carrying amount exceeds its recoverable amount (higher of its fair value less costs of disposal and value in use). Impairment loss on non-financial assets other than goodwill are evaluated for reversal at the end of each reporting period.

2.16 Trade and Other Payables

These amounts represent liabilities for goods and services provided to the Group prior to the end of reporting period which are unpaid. Trade and other payables are presented as current liabilities, unless payment is not due within 12 months after the reporting period. They are recognized initially at their fair value and subsequently measured at amortized cost using the effective interest method.

2.17 Financial Liabilities

(a) Classification and measurement

The Group’s financial liabilities at fair value through profit or loss are financial instruments held for trading. A financial liability is held for trading if it is incurred principally for the purpose of repurchasing in the near term. Derivatives that are not designated as hedging instruments or derivatives separated from financial instruments containing embedded derivatives are also categorized as held for trading.

The Group classifies non-derivative financial liabilities, except for financial liabilities at fair value through profit or loss, financial guarantee contracts and financial liabilities that arise when a transfer of financial assets does not qualify for derecognition, as financial liabilities carried at amortized cost and present as ‘trade payables and other payables’, ‘borrowings’ and ‘other financial liabilities’ in the statement of financial position.

Borrowings are initially recognized as the amount obtained by subtracting the transaction cost incurred from the fair value and is then measured as amortized cost. The difference between the consideration received (net of transaction cost) and the redemption amount is recognized as profit or loss over the period using the effective interest rate method. Fees paid to receive the borrowing limit are recognized as transaction costs for loans to the extent that they are likely to be borrowed as part or all of the borrowing limit. In this case, the fee will be deferred until the draw-down occurs. There is a high possibility that borrowings will be executed as part or all of the borrowing limit agreement (relevant fees to the extent that there is no evidence) are recognized as assets as advance payments for liquidity services and amortized over the relevant borrowing limit period.

Preferred shares that require mandatory redemption at a particular date are classified as liabilities. Interest expenses on these preferred shares using the effective interest method are recognized in the statement of profit or loss as ‘finance costs’, together with interest expenses recognized from other financial liabilities.

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KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

Borrowings are classified as current liabilities unless the Group has an unconditional right to defer settlement of the liability for at least 12 months after the reporting period.

(b) Derecognition

Financial liabilities are removed from the statement of financial position when it is extinguished; for example, when the obligation specified in the contract is discharged or cancelled or expired or when the terms of an existing financial liability are substantially modified. The difference between the carrying amount of a financial liability extinguished or transferred to another party and the consideration paid (including any non-cash assets transferred or liabilities assumed) is recognized in profit or loss.

The Group’s financial liabilities at fair value through profit or loss are financial instruments held for trading and financial liabilities designated as at fair value through profit or loss. A financial liability is held for trading if it is incurred principally for the purpose of repurchasing in the near term. A derivative that is not a designated as hedging instruments and an embedded derivative that is separated are also classified as held for trading. Financial liabilities designed as at fair value through profit or loss are structured financial liabilities containing embedded derivatives issued by the Group.

2.18 Financial Guarantee Contracts

Financial guarantee contracts are recognized as a financial liability at the time the guarantee is issued. The liability is initially measured at fair value, subsequently at the higher of the following amount, and the related liability is recognized as ‘other financial liabilities’ in the consolidated statement of financial position:

• the amount determined in accordance with the expected credit loss model under IFRS 9 Financial Instruments

• the amount initially recognized less, where appropriate, the cumulative amount of income recognized in accordance with IFRS 15 Revenue from Contracts with Customers

2.19 Compound Financial Instruments

Compound financial instruments are convertible notes that can be converted into equity instruments at the option of the holder.

The liability component of a compound financial instrument is recognized initially at the fair value of a similar liability that does not have an equity conversion option, and subsequently measured at amortized cost until extinguished on conversion or maturity of the bonds. The equity component is recognized initially on the difference between the fair value of the compound financial instrument as a whole and the fair value of the liability component. Any directly attributable transaction costs are allocated to the liability and equity components in proportion to their initial carrying amounts.

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KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

2.20 Employee Benefits

(a) Post-employment benefits

The Group operates both defined contribution and defined benefit pension plans.

A defined contribution plan is a pension plan under which the Group pays fixed contributions into a separate entity. The contributions are recognized as employee benefit expenses when an employee has rendered service.

A defined benefit plan is a pension plan that is not a defined contribution plan. Generally, post-employment benefits are payable after the completion of employment, and the benefit amount depended on the employee’s age, periods of service or salary levels. The liability recognized in the statement of financial position in respect of defined benefit pension plans is the present value of the defined benefit obligation at the end of the reporting period less the fair value of plan assets. The defined benefit obligation is calculated annually by independent actuaries using the projected unit credit method. The present value of the defined benefit obligation is determined by discounting the estimated future cash outflows using interest rates of high-quality corporate bonds that are denominated in the currency in which the benefits will be paid, and that have terms approximating to the terms of the related obligation. Remeasurement gains and losses arising from experience adjustments and changes in actuarial assumptions are recognized in the period in which they occur, directly in other comprehensive income.

Changes in the present value of the defined benefit obligation resulting from plan amendments or curtailments are recognized immediately in profit or loss as past service costs.

(b) Termination benefits

Termination benefits are payable when employment is terminated by the Group before the normal retirement date, or whenever an employee accepts voluntary redundancy in exchange for these benefits. The Group recognizes termination benefits at the earlier of the following dates: when the entity can no longer withdraw the offer of those benefits or when the entity recognizes costs for a restructuring.

(c) Long-term employee benefits

Certain entities within the Group provide long-term employee benefits that are entitled to employees with service period for ten years and above. The expected costs of these benefits are accrued over the period of employment using the same accounting methodology as used for defined benefit pension plans. The Group recognizes service cost, net interest on other long-term employee benefits and remeasurements as profit or loss for the year. These liabilities are valued annually by an independent qualified actuary.

2.21 Share-Based Payments

Equity-settled share-based payment is recognized at fair value of equity instruments granted, and employee benefit expense is recognized over the vesting period. At the end of each period, the Group revises its estimates of the number of options that are expected to vest based on the non-market vesting and service conditions. It recognizes the impact of the revision to original estimates, if any, in profit or loss, with a corresponding adjustment to equity.

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KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

The acquiree may have outstanding share-based payment transactions that the acquirer does not exchange for its share-based payment transactions. If vested, those acquiree share-based payment transactions are part of the non-controlling interest in the acquiree and are measured at their market-based measure. If unvested, the market-based measure of unvested share-based payment transactions is allocated to the non-controlling interest on the basis of the ratio of the portion of the vesting period completed to the greater of the total vesting period and the original vesting period of the share-based payment transaction. The balance is allocated to post-combination service.

2.22 Provisions

Provisions for service warranties, recoveries, litigations and claims, and others are recognized when the Group presently hold legal or constructive obligation as a result of past events, and when it is probable that an outflow of resources will be required to settle the obligation and the amount can be reliably estimated. Provisions are measured at the present value of management’s best estimate of the expenditure required to settle the present obligation at the end of the reporting period, and the increase in the provision due to the passage of time is recognized as interest expense.

2.23 Leases

(a) Lessee

The Group leases various repeater server racks, offices, communication line facilities, machinery, cars, and others.

Contracts may contain both lease and non-lease components. The Group allocates the consideration in the contract to the lease and non-lease components based on their relative stand-alone prices.

Assets and liabilities arising from a lease are initially measured on a present value basis. Lease liabilities include the net present value of the following lease payments:

• Fixed payments (including in-substance fixed payments), less any lease incentives receivable

• Variable lease payment that are based on an index or a rate, initially measured using the index or rate as at the commencement date

• Amounts expected to be payable by the Group (the lessee) under residual value guarantees

• The exercise price of a purchase option if the Group (the lessee) is reasonably certain to exercise that option, and

• Payments of penalties for terminating the lease, if the lease term reflects the Group (the lessee) exercising that option

Measurement of lease liability also includes payments to be made in optional periods if the lessee is reasonably certain to exercise an option to extend the lease.

The Group determines the lease term as the non-cancellable period of a lease, together with both (a) periods covered by an option to extend the lease if the lessee is reasonably certain to exercise

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KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

that option; and (b) periods covered by an option to terminate the lease if the lessee is reasonably certain not to exercise that option. When the lessee and the lessor each has the right to terminate the lease without permission from the other party, the Group should consider a termination penalty in determining the period for which the contract is enforceable.

The lease payments are discounted using the interest rate implicit in the lease. If that rate cannot be determined, the lessee’s incremental borrowing rate is used, which is the rate that the lessee would have to pay to borrow the funds necessary to obtain an asset of similar value in a similar economic environment with similar terms and conditions.

The Group is exposed to potential future increases in variable lease payments based on an index or rate, which are not included in the lease liability until they take effect. When adjustments to lease payments based on an index or rate take effect, the lease liability is reassessed and adjusted against the right-of-use asset.

Each lease payment is allocated between the liability and finance cost. The finance cost is charged to profit or loss over the lease period in order to produce a constant periodic rate of interest on the remaining balance of the liability for each period.

Right-of-use assets are measured at cost comprising the following:

• the amount of the initial measurement of lease liability

• any lease payments made at or before the commencement date less any lease incentives received

• any initial direct costs (leasehold deposits)

• restoration costs

The right-of-use asset is depreciated over the shorter of the asset’s useful life and the lease term on a straight-line basis. If the Group is reasonably certain to exercise a purchase option, the right-of-use asset is depreciated over the underlying asset’s useful life.

Payments associated with short-term leases and leases of low-value assets are recognized on a straight-line basis as an expense in profit or loss. Short-term leases are leases with a lease term of 12 months or less, such as vehicles, machinery, and others. Low-value assets are comprised of tools, office equipment, and others.

(b) Lessor

Lease income from operating leases where the Group is a lessor is recognized in income on a straight-line basis over the lease term. Initial direct costs incurred in obtaining an operating lease are added to the carrying amount of the underlying asset and recognized as expense over the lease term on the same basis as lease income. The respective leased assets are included in the statement of financial position based on their nature.

(c) Extension and termination option

Extension and termination options are included in a number of property and equipment leases across the Group. These terms are used to maximize operational flexibility in terms of managing contracts. The majority of extension and termination options held are exercisable only by the

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KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

Group and not by the respective lessor. Information on critical accounting estimates and assumptions related to the determination of the lease term is presented in Note 3.

2.24 Share Capital

The Controlling Company classifies ordinary shares as equity.

Where the Controlling Company purchases its own shares, the consideration paid, including any directly attributable incremental costs, is deducted from equity until the share are cancelled or reissued. When these treasury shares are reissued, any consideration received is included in equity attributable to the equity holders of the Controlling Company.

2.25 Revenue Recognition

(a) Identifying performance obligations

The Group mainly provides telecommunication services and sells handsets. The Group identifies performance obligations with a customer such as providing telecommunication services, selling handsets, and others. Revenue from handsets is recognized when a performance obligation is satisfied by transferring promised goods to customers, and the revenue from telecommunication services is recognized over the estimated contract periods of each services by transferring promised services to customers.

(b) Allocation the transaction price and revenue recognition

The Group allocates the transaction price to each performance obligation identified in the contract based on a relative stand-alone selling prices of the goods or services being provided to the customer. To allocate the transaction price to each performance obligation on a relative stand-alone price basis, the Group determines the stand-alone selling price at contract inception of the distinct good or service underlying each performance obligation in the contract and allocate the transaction price in proportion to those stand-alone selling price. The stand-alone selling price is the price at which the Group would sell a promised good or service separately to the customer. The best evidence of a stand-alone selling price is the observable price of a good or service when the Group sells that good or service separately in similar circumstances and to similar customers. The Group recognizes the allocated amount as contract assets or contract liabilities, and amortizes it through the remaining period which is adjusted in operating income.

(c) Incremental contract acquisition costs

The Group pays commission fees when new customers subscribe to telecommunication services. The incremental contract acquisition costs are those commission fees that the Group incurs to acquire a contract with a customer that would not have been incurred if the contract had not been acquired. The Group recognizes the incremental contract acquisition costs as an asset and amortizes it over the expected period of benefit. However, as a practical expedient, the Group may recognize the incremental contract acquisition costs as an expense when it is incurred if the amortization period of the asset is one year or less.

F-39

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

(d) Commission fees

Commission fees are recognized when it is probable that future economic benefits will flow to the entity and these benefits can be reliably measured. Revenues are measured at the fair value of the consideration received.

2.26 Current and Deferred Income Tax

The tax expense for the period consists of current and deferred tax. Current and deferred tax is recognized in profit or loss, except to the extent that it relates to items recognized in other comprehensive income or directly in equity. In this case, the tax is also recognized in other comprehensive income or directly in equity, respectively.

The current income tax expense is measured at the amount expected to be paid to taxation authorities, using the tax rates (and tax laws) that have been enacted or substantively enacted by the end of the reporting period.

Management periodically evaluates positions taken in tax returns with respect to situations in which applicable tax regulation is subject to interpretation, and considers whether it is probable that a taxation authority will accept an uncertain tax treatment. The Group measures its tax balances either based on the most likely amount or the expected value, depending on which method provides a better prediction of the resolution of the uncertainty.

Deferred income tax is provided in full, using the liability method, on temporary differences arising between the tax bases of assets and liabilities and their carrying amounts in the consolidated financial statements. However, deferred income tax is not accounted for if it arises from initial recognition of an asset or liability in a transaction other than a business combination that at the time of the transaction affects neither accounting profit nor taxable profit or loss.

Deferred tax assets are recognized only if it is probable that future taxable amount will be available to utilize those temporary differences and losses.

The Group recognizes a deferred tax liability all taxable temporary differences associated with investments in subsidiaries, associates, and interests in joint arrangements, except to the extent that the Group is able to control the timing of the reversal of the temporary difference and it is probable that the temporary difference will not reverse in the foreseeable future. In addition, the Group recognizes a deferred tax asset for all deductible temporary differences arising from such investments to the extent that it is probable the temporary difference will reverse in the foreseeable future and taxable profit will be available against which the temporary difference can be utilized.

Deferred tax assets and liabilities are offset when there is a legally enforceable right to offset current tax assets and liabilities and when the deferred tax balances relate to the same taxation authority. Current tax assets and liabilities are offset when the Group has a legally enforceable right to offset and intends either to settle on a net basis, or to realize the assets and settle the liability simultaneously.

2.27 Dividend

Dividend distribution to the Group’s shareholders is recognized as a liability in the financial statements in the period in which the dividends are approved by the Group’s shareholders.

F-40

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

2.28 Approval on Issuance of the Consolidated Financial Statements

The consolidated financial statements of 2023 were approved for issuance by the Board of Directors on April 11, 2024 and are subject to change with the approval of shareholders at their Annual General Meeting.

3 Critical Accounting Estimates and Assumptions

The preparation of financial statements requires the Group to make estimates and assumptions concerning the future. Management also needs to exercise judgement in applying the Group’s accounting policies. Estimates and assumptions are continually evaluated and are based on historical experience and other factors, including expectations of future events that are believed to be reasonable under the circumstances. As the resulting accounting estimates will, by definition, seldom equal the actual results, it poses significant risk of resulting in a material adjustment.

Estimates and assumptions that have significant risks of causing a material adjustment to the carrying amounts of assets and liabilities within the next financial year are discussed below. Additional information of significant judgement and assumptions of certain items are included in relevant notes.

3.1 Impairment of Non-Financial Assets (including Goodwill)

The Group determines the recoverable amount of a cash generating unit (CGU) based on fair value or value-in-use calculations to assess non-financial assets (including goodwill) for impairment (Note 12, 13).

3.2 Income Taxes

The Group’s taxable income generated from these operations are subject to income taxes based on tax laws and interpretations of tax authorities in numerous jurisdictions. There are many transactions and calculations for which the ultimate tax determination is uncertain (Note 29).

If certain portion of the taxable income is not used for investments or increase in wages or dividends in accordance with the Tax System for Recirculation of Corporate Income, the Group is liable to pay additional income tax calculated based on the tax laws. Accordingly, the measurement of current and deferred income tax is affected by the tax effects from the new tax system. As the Group’s income tax is dependent on the investments as well as wage increase, there is uncertainty in measuring the final tax effects(Note 29).

3.3 Fair Value of Financial Instruments

The fair value of financial instruments that are not traded in an active market is determined by using valuation techniques. The Group uses its judgment to select a variety of methods and make assumptions that are mainly based on market conditions existing at the end of each reporting period (Note 37).

F-41

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

3.4 Net Defined Benefit Liability

The present value of net defined benefit liability depends on a number of factors that are determined on an actuarial basis using a number of assumptions including the discount rate (Note 17).

3.5 Amortization of Contract Assets, Contract Liabilities and Contract Cost Assets

Contract assets, contract liabilities and contract cost assets recognized under the application of IFRS 15 are amortized over the expected periods of customer relationships. The estimate of the expected terms of customer relationship is based on the historical data. If management’s estimate changes, it may cause significant differences in the timing of revenue recognition and amounts recognized.

3.6 Critical Judgments in Determining the Lease Term

In determining the lease term, management considers all facts and circumstances that create an economic incentive to exercise an extension option, or not exercise a termination option. Extension options (or periods after termination options) are only included in the lease term if the lease is reasonably certain to be extended (or not terminated).

For leases of property, machinery, and communication line facilities, the following factors are normally the most relevant:

• If there are significant penalties to terminate (or not extend), the Group is typically reasonably certain to extend (or not terminate).

• If any leasehold improvements are expected to have a significant remaining value, the Group is typically reasonably certain to extend (or not terminate).

• Otherwise, the Group considers other factors including historical lease durations and the costs and business disruption required to replace the leased asset.

Most extension options in offices, retail stores and vehicles leases have not been included in the lease liability, because the Group can replace the assets without significant cost or business disruption.

The lease term is reassessed if an option is actually exercised (or not exercised) or the Group becomes obliged to exercise (or not exercise) it. The assessment of reasonable certainty is only revised if a significant event or a significant change in circumstances occurs, which affects this assessment, and that is within the control of the lessee.

F-42

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

4. Financial Instruments by Category

(1) Financial instruments by category as of December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	December 31, 2022
Financial assets	Financial assets at amortized cost		Financial assets at fair value through profit or loss		Financial assets at fair value through other comprehensive income		Derivatives used for hedging		Total
Cash and cash equivalents	￦	2,449,062	￦	—	￦	—	￦	—	￦	2,449,062
Trade and other receivables		7,459,994		—		129,124		—		7,589,118
Other financial assets		1,060,058		1,064,856		1,508,192		190,830		3,823,936

(in millions of Korean won)	December 31, 2022
Financial liabilities	Financial liabilities at amortized cost		Financial liabilities at fair value through profit and loss		Derivatives used for hedging		Others		Total
Trade and other payables1	￦	8,397,264	￦	—	￦	—	￦	—	￦	8,397,264
Borrowings		10,006,685		—		—		—		10,006,685
Other financial liabilities		246,606		141,280		33,555		—		421,441
Lease liabilities		—		—		—		1,172,038		1,172,038

1 Amounts related to employee benefit plans are included in Trade and other payables.

(in millions of Korean won)	December 31, 2023
Financial assets	Financial assets at amortized cost		Financial assets at fair value through profit or loss		Financial assets at fair value through other comprehensive income		Derivatives used for hedging		Total
Cash and cash equivalents	￦	2,879,554	￦	—	￦	—	￦	—	￦	2,879,554
Trade and other receivables		8,458,259		—		116,198		—		8,574,457
Other financial assets		1,385,921		939,661		1,680,168		159,211		4,164,961

(in millions of Korean won)	December 31, 2023
Financial liabilities	Financial liabilities at amortized cost		Financial liabilities at fair value through profit and loss		Derivatives used for hedging		Others		Total
Trade and other payables	￦	8,317,822	￦	—	￦	—	￦	—	￦	8,317,822
Borrowings		10,218,165		—		—		—		10,218,165
Other financial liabilities		915,185		136,106		24,547		—		1,075,838
Lease liabilities		—		—		—		1,179,909		1,179,909

(2) Gains or losses arising from financial instruments by category for the years ended December 31, 2021, 2022 and 2023, are as follows:

F-43

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

(in millions of Korean won)	2021			2022			2023
Financial assets at amortized cost
Interest income1	￦	74,937		￦	144,505		￦	360,134
Gain on foreign currency transactions4		12,826			23,824			22,782
Gain (loss) on foreign currency translation		2,911			(2,151	)		5,741
Gain (loss) on disposal		35			(81	)		(3,409	)
Loss on valuation		(110,286	)		(132,102	)		(172,966	)
Financial assets at fair value through profit or loss
Interest income1		3,673			6,008			13,480
Dividend income5		21,499			4,600			6,918
Gain (loss) on valuation6		64,659			(29,282	)		(31,965	)
Gain on disposal		29,974			2,347			14,237
Gain on foreign currency transactions4		—			1,100			—
Gain on foreign currency translation		17,794			13,711			3,396
Financial assets at fair value through other comprehensive income
Interest income1		222,290			190,281			18,966
Dividend income5		1,365			9,522			52,813
Loss on valuation		—			(61	)		—
Loss on disposal		(22,712	)		(62,183	)		(11,193	)
Other comprehensive income (loss) for the year2		129,780			(158,574	)		121,805
Derivatives used for hedging
Gain on transactions		—			27,628			10,192
Gain on valuation7		203,961			150,699			34,092
Other comprehensive income for the year2		144,967			88,048			7,772

(in millions of Korean won)	2021			2022			2023
Reclassified to profit or loss from other comprehensive gain (loss) for the year2,3		(143,305	)		(110,616	)		(29,178	)
Financial liabilities at amortized cost
Interest expense1		(232,197	)		(275,302	)		(358,486	)
Gain on valuation8		—			—			3,411
Loss on foreign currency transactions4		(3,580	)		(34,574	)		(24,054	)
Loss on foreign currency translation		(201,623	)		(168,577	)		(93,004	)
Financial liabilities at fair value through profit or loss
Gain (loss) on valuation		42,447			30,031			(7,394	)
Gain on disposal Interest expense1		2,136 —			—  (4,046	)		4,788 (44	)
Gain (loss) on foreign currency transactions4		(2	)		24			(5	)
Derivatives used for hedging
Loss on transactions		(6,208	)		(1,291	)		—
Gain (loss) on valuation		(7,206	)		(17,237	)		11,503
Other comprehensive income (loss) for the year2		(3,112	)		(23,957	)		7,557
Reclassified to profit or loss from other comprehensive income for the year2,3		6,722			15,195			(8,764	)
Lease liabilities
Interest expense1		(36,650	)		(41,469	)		(52,035	)
Total	￦	215,095		￦	(353,980	)	￦	(92,910	)

F-44

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

1 BC Card Co., Ltd., etc., subsidiaries of the Group, recognized interest income and expenses as operating revenue and expenses, respectively. Related interest income recognized as operating revenue is ￦112,973 million (2021: ￦27,440 million, 2022: ￦68,869 million) and related interest expense recognized as operating expense is ￦55,677 million (2021: ￦5,458 million, 2022: ￦27,060 million) for the year ended December 31, 2023.

2 The amounts directly reflected in equity after adjustments of deferred income tax.

3 During the years ended December 31, 2022 and 2023, certain derivatives of the Group were settled and the related gain or loss on valuation of cash flow hedge in other comprehensive income was reclassified to profit or loss for the year.

4 BC Card Co., Ltd., a subsidiary of the Group, recognized foreign currency transaction gain and loss and as operating revenue and expense. In relation to this, foreign currency transaction gain and loss recognized as operating revenue and expense amount to foreign exchange gain ￦5,597 million (2021 foreign exchange gain and loss: ￦2,373, 2022 foreign exchange gain and loss: ￦3,569 million), respectively, for the year ended December 31, 2023.

5 BC Card Co., Ltd., a subsidiary of the Group, recognized dividend income as operating revenue. Related dividend income recognized as operating revenue is ￦1,759 million (2021: ￦1,340 million, 2022: ￦2,299 million) for the year ended December 31, 2023.

6 KT Investment Co., Ltd., etc., subsidiaries of the Group, recognized gain and loss on valuation of financial instruments measured at fair value through profit or loss as operating income and expenses. In relation to this, valuation gain and loss recognized as operating revenue and expense amount to valuation loss ￦11,112 million (2021 valuation loss: ￦15,459 million, 2022 valuation loss: ￦7,860 million), for the year ended December 31, 2023.

7 BC Card Co., Ltd., a subsidiary of the Group, recognized gain and loss on valuation of derivatives as operating income and expenses. Related valuation gain recognized as operating revenue and expense is ￦48 million (2022 valuation loss: ￦418 million), for the year ended December 31, 2023.

8 KT Cloud Co., Ltd., a subsidiary of the Group, recognized gain on valuation as convertible preferred stock of ￦311,312 million for the year ended December 31, 2023.

5 Cash and Cash Equivalents

Restricted cash and cash equivalents as of December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	December 31, 2022	December 31, 2023	Description
Bank deposits	￦29,874	￦49,555	Deposit restricted for government project and others

F-45

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

6 Trade and Other Receivables

(1) Trade and other receivables as of December 31, 2022 and 2023, are as follows:

	December 31, 2022
(in millions of Korean won)	Total amounts		Provision for impairment			Present value discount			Carrying amount
Current assets
Trade receivables	￦	3,439,542	￦	(342,539	)	￦	(6,926	)	￦	3,090,077
Other receivables		3,092,261		(82,243	)		(2,023	)		3,007,995
Total	￦	6,531,803	￦	(424,782	)	￦	(8,949	)	￦	6,098,072
Non-current assets
Trade receivables	￦	408,098	￦	(1,199	)	￦	(11,540	)	￦	395,359
Other receivables		1,249,096		(136,300	)		(17,109	)		1,095,687
Total	￦	1,657,194	￦	(137,499	)	￦	(28,649	)	￦	1,491,046

	December 31, 2023
(in millions of Korean won)	Total amounts		Provision for impairment			Present value discount			Carrying amount
Current assets
Trade receivables	￦	3,596,899	￦	(330,002	)	￦	(9,165	)	￦	3,257,732
Other receivables		3,990,900		(76,089	)		(2,254	)		3,912,557
Total	￦	7,587,799	￦	(406,091	)	￦	(11,419	)	￦	7,170,289
Non-current assets
Trade receivables	￦	318,429	￦	(1,288	)	￦	(19,476	)	￦	297,665
Other receivables		1,227,929		(107,547	)		(13,879	)		1,106,503
Total	￦	1,546,358	￦	(108,835	)	￦	(33,355	)	￦	1,404,168

(2) The fair values of trade and other receivables with original maturities less than one year are equal to their carrying amounts because the discounting effect is immaterial. The fair value of trade and other receivables with original maturities longer than one year, which are mainly from sales of goods, is determined by discounting the expected future cash flow at the weighted average interest rate.

F-46

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

(3) Details of changes in provision for impairment for the years ended December 31, 2022 and 2023, are as follows:

	2022						2023
(in millions of Korean won)	Trade receivables			Other receivables			Trade receivables			Other receivables
Beginning balance	￦	349,725		￦	201,387		￦	343,738		￦	218,543
Provision		64,522			65,941			69,972			114,501
Reversal		—			(850	)		—			(14,941	)
Write-off/transfer		(69,430	)		(49,904	)		(69,246	)		(129,108	)
Acquisition and disposition of businesses		(43	)		—			(310	)		(17	)
Others		(1,036	)		1,969			(12,864	)		(5,342	)
Ending balance	￦	343,738		￦	218,543		￦	331,290		￦	183,636

Provisions for impairment on trade and other receivables are recognized as operating expenses and finance costs.

(4) Details of other receivables as of December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	December 31, 2022			December 31, 2023
Loans	￦	98,953		￦	51,854
Receivables1		2,668,545			3,539,742
Accrued income		32,218			43,920
Refundable deposits		339,450			299,935
Loans receivable		1,013,428			1,067,005
Finance lease receivables		105,690			141,883
Others		63,941			58,357
Less: Provision for impairment		(218,543	)		(183,636	)
	￦	4,103,682		￦	5,019,060

1 As of December 31, 2023, credit sales asset of ￦2,696,505 million (December 31, 2022: ￦1,960,579 million) held by BC Card Co., Ltd. are included.

(5) The maximum exposure of trade and other receivables to credit risk is the carrying amount of each class of receivables mentioned above as of December 31, 2023.

(6) For trade receivables that meet certain criteria, the Group sells those on a periodic basis to an Special Purpose Company(SPC) and records them at financial assets as fair value through other comprehensive income considering the trade receivables business model for managing the asset and the cash flow characteristics of the contract.

F-47

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

7 Other Financial Assets and Liabilities

(1) Details of other financial assets and liabilities as of December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	December 31, 2022			December 31, 2023
Other financial assets
Financial assets at amortized cost1	￦	1,060,058		￦	1,385,921
Financial assets at fair value through profit or loss1,2		1,064,856			939,661
Financial assets at fair value through other comprehensive income		1,508,192			1,680,168
Derivatives used for hedging		190,830			159,211
Less: Non-current		(2,501,484	)		(2,724,761	)
Current	￦	1,322,452		￦	1,440,200
Other financial liabilities
Financial liabilities at amortized cost3	￦	246,606		￦	915,185
Financial liabilities at fair value through profit or loss		141,280			136,106
Derivatives used for hedging		33,555			24,547
Less: Non-current		(412,650	)		(753,739	)
Current	￦	8,791		￦	322,099

1 As of December 31, 2023, the Group’s other financial assets amounting to ￦98,309 million (December 31, 2022: ￦102,215 million), which consist of checking account deposits, time deposits and others, are subject to withdrawal restrictions.

2 As of December 31, 2023, the Group provided investments in Korea Software Financial Cooperative amounting to ￦9,016 million as a collateral for the payment guarantee provided by the Cooperative.

3 The amount includes liabilities related to the obligation to acquire additional shares in Epsilon Global Communications Pte. Ltd. and MILLIE Co., Ltd and KT Cloud Co., Ltd. (Note 19).

(2) Financial Assets at fair value through profit or loss

1) Details of financial assets at fair value through profit or loss as of December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	December 31, 2022			December 31, 2023
Equity Instruments (Listed)	￦	26,647		￦	13,911
Equity Instruments (Unlisted)		72,517			42,185
Debt securities		942,274			880,549
Derivatives held for trading1		23,418			3,016
Total		1,064,856			939,661
Less: non-current		(609,887	)		(782,143	)
Current	￦	454,969		￦	157,518

1 According to a derivative arrangement with LS Marine Solution Co., Ltd. (formerly KT Submarine Co., Ltd.), derivative assets amounting to ￦1,015 million is included as of December 31, 2023. (Note 19).

F-48

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

2) The maximum exposure of debt instruments of financial assets recognized at fair value through profit or loss to credit risk is the carrying amount as of December 31, 2023.

(3) Financial Assets at fair value through other comprehensive income

1) Details of financial assets at fair value through other comprehensive income as of December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	December 31, 2022			December 31, 2023
Equity Instruments (Listed)	￦	1,006,476		￦	1,231,188
Equity Instruments (Unlisted)		496,284			443,067
Debt securities		5,432			5,913
Total		1,508,192			1,680,168
Less: non-current		(1,508,192	)		(1,680,168	)
Current	￦	—		￦	—

2) Upon disposal of these equity investments, any balance within the accumulated other comprehensive income for these equity investments is not classified to profit or loss, but to retained earnings. Upon disposal of these debt investments, the remaining balance of the accumulated other comprehensive income of debt investments is reclassified to profit or loss.

(4) Derivatives used for hedging

1) Details of valuation of derivatives used for hedging as of December 31, 2022 and 2023, are as follows:

	December 31, 2022						December 31, 2023
(in millions of Korean won)	Assets			Liabilities			Assets			Liabilities
Interest rate swap	￦	4,236		￦	—		￦	1,530		￦	191
Currency swap1		186,594			33,555			157,681			24,356
Total		190,830			33,555			159,211			24,547
Less: non-current		(147,141	)		(33,555	)		(107,802	)		(23,696	)
Current	￦	43,689		￦	—		￦	51,409		￦	851

1 The currency swap contract is to hedge the risk of variability in cash flow from the borrowings due to changes in interest rate and foreign exchange rate and the expected maximum period for the Group to be exposed to risks of cash flow fluctuation by hedged items is until September 7, 2034.

The entire fair value of a hedging derivative is classified as a non-current asset or liability if the remaining maturity of the hedged item is more than 12 months and, as a current asset or liability, if the maturity of the hedged item is less than 12 months.

F-49

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

2) The valuation gains and losses on the derivatives contracts for the years ended December 31, 2021, 2022 and 2023, are as follows:

(in millions of Korean won)	2021						2022						2023
Type of Transaction	Valuation gain		Valuation loss		Other comprehensive income1		Valuation gain		Valuation loss		Other comprehensive income1		Valuation gain		Valuation Loss		Other comprehensive income1
Interest rate swap	￦	—	￦	—	￦	1	￦	63	￦	490	￦	4,666	￦	48	￦	—	￦	(2,945	)
Currency swap		203,961		7,206		191,569		154,611		20,723		79,781		45,709		162		(27,273	)
Currency forwards		—		—		—		—		—		754		—		—		—
Total	￦	203,961	￦	7,206	￦	191,570	￦	154,674	￦	21,213	￦	85,201	￦	45,757	￦	162	￦	(30,218	)

1 The amounts directly reflected in equity are before adjustments of deferred income tax and allocation to the non-controlling interest.

3) The ineffective portion recognized in profit or loss on the cash flow hedges are valuation loss of ￦41 million for the year ended December 31, 2023 (2021: valuation gain of ￦11,825 million, 2022: valuation gain of ￦2,707 million).

4) The unsettled amount of derivative instruments for the years ended December 31, 2022 and 2023, are as follows:

(i) Hedging instruments

(in millions of Korean won and thousands of foreign currencies)	2022
					Book value of hedging instruments				Changes in fair value to calculate the ineffective portion of hedges
Currency	Foreign currency		Contract amount		Assets		Liabilities
USD		2,111,509	￦	2,527,626	￦	160,243	￦	32,936	￦	170,856
JPY		400,000		4,357		—		409		(308	)
SGD		284,000		245,208		26,351		—		20,511
EUR		7,700		10,283		—		210		129
KRW		—		170,000		4,236		—		4,717
Total			￦	2,957,474	￦	190,830	￦	33,555	￦	195,905

(in millions of Korean won and thousands of foreign currencies)	2023
					Book value of hedging instruments				Changes in fair value to calculate the ineffective portion of hedges
Currency	Foreign currency		Contract amount		Assets		Liabilities
USD		2,011,509	￦	2,417,473	￦	157,681	￦	23,465	￦	44,413
JPY		400,000		4,357		—		660		(162	)
EUR		7,700		10,283		—		231		381
KRW		—		240,000		1,530		191		707
Total		—	￦	2,672,113	￦	159,211	￦	24,547	￦	45,339

F-50

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

(ii) Hedged item

(in millions of Korean won)
	2022								2023
Currency	Book value of hedged items		Changes in fair value to calculate the ineffective portion of hedges			Cash flow hedge reserves1			Book value of hedged items		Changes in fair value to calculate the ineffective portion of hedges			Cash flow hedge reserves1
USD	￦	2,675,885	￦	(170,010	)	￦	(13,947	)	￦	2,593,707	￦	(44,365	)	￦	(30,415	)
JPY		3,813		308			116			3,651		162			49
SGD		267,843		(18,720	)		3,406			—		—			—
EUR		10,404		(121	)		582			10,985		(581	)		158
KRW		101,035		(4,655	)		4,385			239,944		(596	)		1,315
Total	￦	3,058,980	￦	(193,198	)	￦	(5,458	)	￦	2,848,287	￦	(45,380	)	￦	(28,893	)

1 The amount is after the deferred tax directly added or subtracted to the capital is reflected.

(5) Financial Liabilities at fair value through profit or loss

1) Details of financial liabilities at fair value through profit or loss as of December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	December 31, 2022		December 31, 2023
Derivatives held for trading 1,2	￦	141,280	￦	136,106

1 In relation to the additional acquisition of shares of the equity method investee K Bank Inc in 2021, the Group has entered into a shareholder agreement with the shareholders of K Bank Inc. According to the shareholder agreement, if K Bank Inc fails to be listed on the terms agreed in the shareholder agreement, the shareholders of K Bank Inc may exercise their Drag-Along right to the Group and require the Group to sell all the shares owned by such shareholders in K Bank to third parties based on the guaranteed return agreed in the shareholder agreement. The shareholder agreement also includes a call option where, if the shareholders exercise their Drag-Along rights, the Group has an option to purchase the shares held by those shareholders. As of December 31, 2023, the derivative financial liability in accordance with IFRS 9 associated with the rights prescribed in the shareholders agreement was ￦133,293 million(￦134,881 million as of December 31 2022).

2 The amount includes derivatives separated from convertible bonds issued by the Group (Note 15).

2) The valuation gain and loss on financial liabilities at fair value through profit or loss for the years ended December 31, 2021, 2022 and 2023, are as follows:

2021

2022

2023

(in millions of Korean won)

Valuation gain

Valuation loss

Valuation gain

Valuation loss

Valuation gain

Valuation loss

Derivatives liabilities held for trading

￦

51,187

￦

8,741

￦

24,683

￦

1,800

￦

3,316

￦

10,710

F-51

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

8. Inventories

Inventories as at December 31, 2022 and 2023, are as follows:

	December 31, 2022							December 31, 2023
(in millions of Korean won)	Acquisition cost		Valuation allowance			Book amount		Acquisition cost		Valuation Allowance			Book amount
Merchandise	￦	768,748	￦	(96,010	)	￦	672,738	￦	981,127	￦	(102,215	)	￦	878,912
Others		44,935		—			44,935		109,439		—			109,439
Total	￦	813,683	￦	(96,010	)	￦	717,673	￦	1,090,566	￦	(102,215	)	￦	988,351

Cost of inventories recognized as expenses for the year ended December 31, 2023 amounts to ￦3,386,069 million (2021: ￦3,787,203 million, 2022: ￦3,485,288 million) and valuation loss on inventory amounts to ￦6,205 million for the year ended December 31, 2023 (2021: reversal valuation loss on inventory amounts to ￦12,920 million, 2022: reversal valuation loss on inventory amounts to ￦24,294 million).

9. Other Assets and Liabilities

Other assets and liabilities as at December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	December 31, 2022			December 31, 2023
Other assets
Advance payments	￦	181,150		￦	217,997
Prepaid expenses		107,775			146,628
Contract cost		1,817,678			1,727,468
Contract assets		802,253			832,520
Others		12,964			15,237
Less: Non-current		(820,608	)		(827,297	)
Current	￦	2,101,212		￦	2,112,553
Other liabilities
Advances received1	￦	387,986		￦	682,880
Withholdings		155,017			159,080
Unearned revenue1		46,493			27,392
Lease liabilities		1,172,038			1,179,909
Contract liabilities		284,107			278,749
Others		33,108			30,848
Less: Non-current		(945,731	)		(950,015	)
Current	￦	1,133,018		￦	1,408,843

1 The amounts include adjustments arising from adoption of IFRS 15 Revenue from Contracts with Customers (Note 25).

F-52

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

10 Property and Equipment

(1) Changes in property and equipment for the years ended December 31, 2022 and 2023, are as follows:

	2022
(in millions of Korean won)	Land			Buildings and structures			Machinery and equipment			Others			Construction- in-progress			Total
Acquisition cost	￦	1,315,929		￦	4,707,250		￦	40,270,005		￦	1,607,853		￦	1,094,479		￦	48,995,516
Less: Accumulated depreciation (including accumulated impairment loss and others)		(132	)		(2,189,828	)		(30,953,434	)		(1,386,615	)		(621	)		(34,530,630	)
Beginning, net		1,315,797			2,517,422			9,316,571			221,238			1,093,858			14,464,886
Acquisition and capital expenditure		11,392			32,030			129,754			67,921			3,105,283			3,346,380
Disposal and termination		(2,556	)		(4,338	)		(76,608	)		(4,695	)		(3,926	)		(92,123	)
Depreciation		—			(147,620	)		(2,413,191	)		(79,376	)		—			(2,640,187	)
Impairment		—			—			(6,084	)		(7,825	)		(2,247	)		(16,156	)
Transfer in (out)1		24,647			230,955			2,660,753			31,036			(3,010,193	)		(62,802	)
Transfer from (to) investment properties		(63,278	)		(140,229	)		—			—			(2,676	)		(206,183	)
Acquisition and disposition of businesses		—			—			(4,386	)		(481	)		(3,720	)		(8,587	)
Others		(13,194	)		66,341			7,020			(4,382	)		(68,834	)		(13,049	)
Ending, net	￦	1,272,808		￦	2,554,561		￦	9,613,829		￦	223,436		￦	1,107,545		￦	14,772,179
Acquisition cost	￦	1,272,940		￦	4,830,853		￦	42,091,573		￦	1,276,779		￦	1,108,043		￦	50,580,188
Less: Accumulated depreciation (including accumulated impairment loss and others)		(132	)		(2,276,292	)		(32,477,744	)		(1,053,343	)		(498	)		(35,808,009	)

1 The amounts include the transferred amount to Intangible Assets account.

	2023
(in millions of Korean won)	Land			Buildings and structures			Machinery and equipment			Others			Construction- in-progress			Total
Acquisition cost	￦	1,272,940		￦	4,830,853		￦	42,091,573		￦	1,276,779		￦	1,108,043		￦	50,580,188
Less: Accumulated depreciation (including accumulated impairment loss and others)		(132	)		(2,276,292	)		(32,477,744	)		(1,053,343	)		(498	)		(35,808,009	)
Beginning, net		1,272,808			2,554,561			9,613,829			223,436			1,107,545			14,772,179
Acquisition and capital expenditure		844			5,072			75,412			78,400			3,029,380			3,189,108
Disposal and termination		(3,651	)		(5,012	)		(70,418	)		(1,711	)		(327	)		(81,119	)
Depreciation		—			(148,981	)		(2,495,402	)		(75,900	)		—			(2,720,283	)
Impairment		—			—			(6,577	)		(1	)		(1,294	)		(7,872	)
Transfer in (out)1		58,790			151,157			2,706,444			16,407			(3,092,670	)		(159,872	)
Transfer from (to) investment properties		(37,725	)		(88,336	)		—			—			(189	)		(126,250	)
Acquisition and disposition of businesses		18,761			49,532			(14,981	)		(44,543	)		(3,205	)		5,564
Others		14,549			137			(1,628	)		(7,742	)		(4,692	)		624
Ending, net	￦	1,324,376		￦	2,518,130		￦	9,806,679		￦	188,346		￦	1,034,548		￦	14,872,079
Acquisition cost	￦	1,324,508		￦	4,903,073		￦	43,611,280		￦	1,182,144		￦	1,035,198		￦	52,056,203
Less: Accumulated depreciation (including accumulated impairment loss and others)		(132	)		(2,384,943	)		(33,804,601	)		(993,798	)		(650	)		(37,184,124	)

1 The amounts include the transferred amount to Intangible Assets account.

F-53

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

(2) Details of property and equipment and investment properties provided as collateral as of December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	December 31, 2022
	Carrying amount		Secured amount		Related line item		Related amount		Secured party
Land and Buildings	￦	13,899	￦	19,100		Borrowings	￦	6,000		Industrial Bank of Korea, etc.
Land and Buildings	￦	460,166	￦	61,733		Deposits	￦	52,662		Lessee
(in millions of Korean won)	December 31, 2023
	Carrying amount		Secured amount		Related line item		Related amount		Secured party
Land and Buildings	￦	81,057	￦	64,680		Borrowings	￦	54,900		Industrial Bank of Korea, etc.
Land and Buildings	￦	555,921	￦	64,877		Deposits	￦	55,965		Lessee

(3) The borrowing costs capitalized for qualifying assets amount to ￦17,671 million (2021: ￦5,360 million, 2022: ￦9,954 million), for the year ended December 31, 2023. The range of interest rate applied to calculate the capitalized borrowing costs, for the year ended December 31, 2023, is 1.86%~7.28% (2021: 1.85% ~ 2.45%, 2022: 1.85%~7.42%).

11. Investment Properties

(1) Changes in investment properties for the years ended December 31, 2022 and 2023, are as follows:

	2022
(in millions of Korean won)	Land			Buildings			Construction- in-progress			Total
Acquisition cost	￦	815,331		￦	1,424,066		￦	66,801		￦	2,306,198
Less: Accumulated depreciation		(1,568	)		(583,976	)		—			(585,544	)
Beginning, net		813,763			840,090			66,801			1,720,654
Acquisition		14,569			17,351			55,478			87,398
Disposal and termination		(14,725	)		(5,858	)		(17	)		(20,600	)
Depreciation		—			(47,004	)		—			(47,004	)
Transfer from(to) property and equipment		63,278			140,229			2,676			206,183
Transfer and others		2,907			(28,350	)		12,170			(13,273	)
Ending, net	￦	879,792		￦	916,458		￦	137,108		￦	1,933,358
Acquisition cost	￦	881,360		￦	1,577,736		￦	137,108		￦	2,596,204
Less: Accumulated depreciation		(1,568	)		(661,278	)		—			(662,846	)

F-54

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

	2023
(in millions of Korean won)	Land			Buildings			Construction- in-progress			Total
Acquisition cost	￦	881,360		￦	1,577,736		￦	137,108		￦	2,596,204
Less: Accumulated depreciation		(1,568	)		(661,278	)		—			(662,846	)
Beginning, net		879,792			916,458			137,108			1,933,358
Acquisition		—			57,529			153,279			210,808
Disposal and termination		(8,167	)		(9,323	)		—			(17,490	)
Depreciation		—			(52,869	)		—			(52,869	)
Transfer from(to) property and equipment		37,725			88,336			189			126,250
Transfer and others		1			27,544			(29,467	)		(1,922	)
Ending, net	￦	909,351		￦	1,027,675		￦	261,109		￦	2,198,135
Acquisition cost	￦	910,919		￦	1,750,677		￦	261,109		￦	2,922,705
Less: Accumulated depreciation		(1,568	)		(723,002	)		—			(724,570	)

(2) The fair value of investment properties is ￦5,276,169 million as of December 31, 2023 (December 31, 2022: ￦5,370,047 million). The fair value of investment properties is estimated based on the expected cash flow.

(3) Rental income from investment properties is ￦224,016 million in 2023 (2021: ￦185,877 million, 2022: ￦206,127 million). The direct operating expenses (including repairs and maintenance) arising from investment properties that generated rental income during the period are recognized as operating expenses.

(4) As of December 31, 2023, the Group (Lessor) has entered into a non-cancellable operating lease contract relating to real estate lease. The future minimum lease fee under this contract is ￦101,738 million for one year or less, ￦130,707 million more than one year and less than five years, ￦18,817 million over five years, and ￦251,262 million in total.

F-55

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

12. Intangible Assets

(1) Changes in intangible assets for the years ended December 31, 2022 and 2023, are as follows:

	2022
(in millions of Korean won)	Goodwill			Development costs			Software			Frequency usage rights			Others			Total
Acquisition cost	￦	1,002,530		￦	1,812,377		￦	1,083,426		￦	2,617,647		￦	1,426,576		￦	7,942,556
Less: Accumulated amortization (including accumulated impairment loss and others)		(305,658	)		(1,584,004	)		(944,001	)		(778,516	)		(883,044	)		(4,495,223	)
Beginning, net	￦	696,872		￦	228,373		￦	139,425		￦	1,839,131		￦	543,532		￦	3,447,333
Acquisition and capital expenditure		19,455			45,997			55,651			—			225,886			346,989
Disposal and termination		—			(5,503	)		(48	)		—			(20,117	)		(25,668	)
Amortization		—			(93,374	)		(54,748	)		(350,265	)		(128,874	)		(627,261	)
Impairment		(24,006	)		(744	)		(508	)		—			(5,416	)		(30,674	)
Acquisition and disposition of businesses		—			(2,320	)		(802	)		—			(7,144	)		(10,266	)
Others		15,902			(573	)		16,106			(610	)		(1,445	)		29,380
Ending, net	￦	708,223		￦	171,856		￦	155,076		￦	1,488,256		￦	606,422		￦	3,129,833
Acquisition cost		1,037,887			1,803,687			1,156,951			2,617,707			1,532,061			8,148,293
Less: Accumulated amortization (including accumulated impairment loss and others)		(329,664	)		(1,631,831	)		(1,001,875	)		(1,129,451	)		(925,639	)		(5,018,460	)

	2023
(in millions of Korean won)	Goodwill			Development costs			Software			Frequency usage rights			Others			Total
Acquisition cost	￦	1,037,887		￦	1,803,687		￦	1,156,951		￦	2,617,707		￦	1,532,061		￦	8,148,293
Less: Accumulated amortization (including accumulated impairment loss and others)		(329,664	)		(1,631,831	)		(1,001,875	)		(1,129,451	)		(925,639	)		(5,018,460	)
Beginning, net		708,223			171,856			155,076			1,488,256			606,422			3,129,833
Acquisition and capital expenditure1		—			33,078			38,603			37			238,019			309,737
Disposal and termination		—			(4,812	)		(397	)		—			(6,431	)		(11,640	)
Amortization 2		—			(63,052	)		(52,265	)		(350,276	)		(226,316	)		(691,909	)
Impairment		(230,352	)		(128	)		(16	)		—			(5,711	)		(236,207	)
Acquisition and disposition of businesses		6,207			—			(108	)		—			(69	)		6,030
Others		4,349			1,658			11,769			175			10,066			28,017
Ending, net	￦	488,427		￦	138,600		￦	152,662		￦	1,138,192		￦	615,980		￦	2,533,861
Acquisition cost	￦	1,036,354		￦	1,790,446		￦	1,196,329		￦	2,415,243		￦	1,725,087		￦	8,163,459
Less: Accumulated amortization (including accumulated impairment loss and others)		(547,927	)		(1,651,846	)		(1,043,667	)		(1,277,051	)		(1,109,107	)		(5,629,598	)

1 The amounts include the transferred amount from Property and Equipment account.

2 Amounts include ￦52,179 million which is the changed effect of useful life from Media Contents asset.

F-56

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

(2) Goodwill, amounting to ￦ 212,910 million, is not subject to amortization as of December 31, 2023 (December 31, 2022: ￦ 210,114 million).

(3) Goodwill is allocated to the Group’s cash-generating unit which is identified by operating segments. As of December 31, 2023, goodwill allocated to each cash-generating unit is as follows:

(in millions of Korean won)
Cash generating Unit	Amount
Mobile services1,9	￦	65,057
BC Card Co., Ltd.2		41,234
HCN Co., Ltd. 3		130,242
GENIE Music Corporation 4		50,214
MILLIE Co., Ltd.5		54,725
PlayD Co., Ltd. 6		40,068
KT Telecop Co., Ltd. 7		15,418
Epsilon Global Communications Pte. Ltd. 8		45,670
KT MOS Bukbu Co., Ltd and others		45,799
Total	￦	488,427

1 The recoverable amounts of mobile services business are calculated based on value-in use calculations. These calculations use discounted cash flow projections for the next five years based on financial budgets. A terminal growth rate of 0.0% was applied for the cash flows expected to be incurred after five years. This growth rate does not exceed the average growth rate of the industry which the cash-generating unit belongs in. The Group estimated its revenue growth rate 0.56% based on past performance and its expectation of future market changes. In addition, management estimated the cash flow based on past performance and its expectation of market growth, and the discount rates 6.68% used reflected specific risks relating to the relevant CGU. As a result of the impairment test, the Group concluded that the carrying amount of CGU does not exceed the recoverable amount. Accordingly, the Group did not recognize an impairment loss on goodwill on mobile business for the years ended December 31, 2021, 2022 and 2023.

2 The recoverable amounts of BC Card Co., Ltd. are calculated based on value-in use calculations. These calculations use discounted cash flow projections for the next five years based on financial budgets. A terminal growth rate of 0.0% was applied for the cash flows expected to be incurred after five years. This growth rate does not exceed the average growth rate of the industry which the cash-generating unit belongs in. The Group estimated its revenue growth rate 0.04% based on past performance and its expectation of future market changes. In addition, management estimated the cash flow based on past performance and its expectation of market growth, and the discount rates 5.22% used reflected specific risks relating to the relevant CGU. As a result of the impairment test, the Group concluded that the carrying amount of CGU does not exceed the recoverable amount. Accordingly, the Group did not recognize an impairment loss on goodwill on BC Card Co., Ltd. for the years ended December 31, 2021, 2022 and 2023.

F-57

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

3 The recoverable amounts of HCN Co., Ltd. are calculated based on value-in use calculations. These calculations use discounted cash flow projections for the next five years based on financial budgets. A terminal growth rate of 0.0% was applied for the cash flows expected to be incurred after five years. This growth rate does not exceed the average growth rate of the industry which the cash-generating unit belongs in. The Group estimated its revenue growth rate 2.21% based on past performance and its expectation of future market changes. In addition, management estimated the cash flow based on past performance and its expectation of market growth, and the discount rates 11.37% used reflected specific risks relating to the relevant CGU. As a result of the impairment test, HCN’s recoverable amount was KRW 130,242 million, which was less than the carrying amount, and KRW 98,432 million of the impairment loss was recorded as goodwill in full and reflected in operating expenses.

4 The recoverable amounts of GENIE Music Corporation are calculated based on value-in use calculations. These calculations use discounted cash flow projections for the next five years based on financial budgets. A terminal growth rate of 0.0% was applied for the cash flows expected to be incurred after five years. This growth rate does not exceed the average growth rate of the industry which the cash-generating unit belongs in. The Group estimated its revenue growth rate 4.51% based on past performance and its expectation of future market changes. In addition, management estimated the cash flow based on past performance and its expectation of market growth, and the discount rates 16.73% used reflected specific risks relating to the relevant CGU. As a result of the impairment test, the Group concluded that the carrying amount of CGU does not exceed the recoverable amount. Accordingly, the Group did not recognize an impairment loss on goodwill on GENIE Music Corporation for the years ended December 31, 2023.

5 The recoverable amounts of MILLIE Co., Ltd. are calculated based on value-in use calculations. These calculations use discounted cash flow projections for the next four years based on financial budgets. A terminal growth rate of 1.0% was applied for the cash flows expected to be incurred after four years. This growth rate does not exceed the average growth rate of the industry which the cash-generating unit belongs in. The Group estimated its revenue growth rate 9.96% based on past performance and its expectation of future market changes. In addition, management estimated the cash flow based on past performance and its expectation of market growth, and the discount rates 22.48% used reflected specific risks relating to the relevant CGU. As a result of the impairment test, the Group concluded that the carrying amount of CGU does not exceed the recoverable amount. Accordingly, the Group did not recognize an impairment loss on goodwill on MILLIE Co., Ltd. for the years ended December 31, 2023.

6 The recoverable amount of PlayD Co., Ltd is calculated based on fair value less cost to sell.

7 The recoverable amounts of KT Telecop Co., Ltd. are calculated based on value-in use calculations. These calculations use discounted cash flow projections for the next five years based on financial budgets. A terminal growth rate of 1.0% was applied for the cash flows expected to be incurred after five years. This growth rate does not exceed the average growth rate of the industry which the cash-generating unit belongs in. The Group estimated its revenue growth rate 3.54% based on past performance and its expectation of future market changes. In addition, management estimated the cash flow based on past performance and its expectation of market growth, and the discount rates 9.04% used reflected specific risks relating to the relevant CGUs. As a result of the impairment test, the Group concluded that the carrying amount of CGU does not exceed the recoverable amount. Accordingly, the Group did not recognize an impairment loss on goodwill on KT Telecop Co., Ltd. for the years ended December 31, 2021, 2022 and 2023.

F-58

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

8 The recoverable amounts of Epsilon Global Communications Pte. Ltd. are calculated based on value-in use calculations. These calculations use discounted cash flow projections for the next nine years based on financial budgets. A terminal growth rate of 1.0% was applied for the cash flows expected to be incurred after nine years. This growth rate does not exceed the average growth rate of the industry which the cash-generating unit belongs in. The Group estimated its revenue growth rate 10.57% based on past performance and its expectation of future market changes. In addition, management estimated the cash flow based on past performance and its expectation of market growth, and the discount rates 8.84% used reflected specific risks relating to the relevant CGU. As a result of the impairment test, Epsilon Global Communications’s recoverable amount was KRW 45,670 million, which was less than the carrying amount, and KRW 118,609 million of the impairment loss was recorded as goodwill in full and reflected in operating expenses.

9 The Group performed its impairment assessment for long-lived assets attributed to the Information and Communication Technology (“ICT”) reporting segment, which includes the Cash-Generating Units of Mobile, Fixed line, and Corporate Services (the “CGUs”). The Group compared the carrying value of each CGU to the estimated recoverable amount. The recoverable amounts of ICT reporting segment are calculated based on value-in use calculations. These calculations use discounted cash flow projections for the next five years based on financial budgets. A terminal growth rate of 0.0% was applied for the cash flows expected to be incurred after five years. This growth rate does not exceed the average growth rate of the industry which the cash-generating unit belongs in. The Group estimated its revenue growth rate 0.56% ~ 9.14% based on past performance and its expectation of future market changes. In addition, management estimated the cash flow based on past performance and its expectation of market growth, and the discount rate 6.68%. Accordingly, the Group did not recognize an impairment loss on ICT reporting segment for the years ended December 31, 2021, 2022 and 2023.

13. Investments in Associates and Joint Ventures

(1) Details of associates as of December 31, 2022 and 2023, are as follows:

	Percentage of ownership (%)						Location		Closing month
	December 31, 2022			December 31, 2023
KIF Investment Fund		33.3	%		33.3	%		Korea		December
K Bank Inc.		33.7	%		33.7	%		Korea		December
HD Hyundai Robotics Co., Ltd. (formerly Hyundai Robotics Co., Ltd.)1		10.0	%		10.0	%		Korea		December
Megazone Cloud Corporation1		6.8	%		6.8	%		Korea		December
IGIS No. 468-1 General Private Real Estate Investment Company		44.6	%		44.6	%		Korea		December
KT-DSC Creative Economy Youth Start-up Investment Fund		28.6	%		28.6	%		Korea		December
IGIS Professional Investors Private Investment Real Estate Investment LLCNo 395		35.3	%		35.3	%		Korea		December
LS Marine Solution Co., Ltd (formerly KT Submarine Co., Ltd.).1, 2		32.9	%		7.3	%		Korea		December

1 As of December 31, 2023, although the Group has less than 20% ownership in ordinary share, this entity is included in investments in associates as the Group has significant influence in determining the operational and financial policies.

F-59

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

2 As of December 31, 2023, due to the loss of control of an entity, it is now accounted as an associate.

(2) Changes in investments in associates and joint ventures for the years ended December 31, 2022 and 2023, are as follows:

	2022
(in millions of Korean won)	Beginning		Acquisition (Disposal)		Share of net profit (loss) from associates and joint ventures			Others			Ending
KIF Investment Fund	￦	178,935	￦	—	￦	2,502		￦	(10,458	)	￦	170,979
K Bank Inc.		831,737		—		29,010			(7,991	)		852,756
HD Hyundai Robotics Co., Ltd. (formerly Hyundai Robotics Co., Ltd.)		48,725		—		798			(151	)		49,372
Megazone Cloud Corporation		—		130,001		(22,555	)		28,753			136,199
IGIS No. 468-1 General Private Real Estate Investment Company		—		25,000		(1,411	)		—			23,589
KT-DSC Creative Economy Youth Start-up Investment Fund		22,138		—		(13	)		(2	)		22,123
IGIS Professional Investors Private Investment Real Estate Investment LLC No. 395		17,084		—		(464	)		—			16,620
Others		189,810		100,040		(24,688	)		(56,078	)		209,084
	￦	1,288,429	￦	255,041	￦	(16,821	)	￦	(45,927	)	￦	1,480,722

F-60

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

	2023
(in millions of Korean won)	Beginning		Acquisition (Disposal)			Share of net profit (loss) from associates and joint ventures1			Others			Ending
KIF Investment Fund	￦	170,979	￦	—		￦	5,443		￦	632		￦	177,054
K Bank Inc.		852,756		—			1,089			19,036			872,881
HD Hyundai Robotics Co., Ltd. (formerly Hyundai Robotics Co., Ltd.)		49,372		—			(1,637	)		(1	)		47,734
Megazone Cloud Corporation		136,199		—			(4,583	)		78			131,694
IGIS No. 468-1 General Private Real Estate Investment Company		23,589		—			(105	)		—			23,484
KT-DSC Creative Economy Youth Start-up Investment Fund		22,123		(500	)		3,494			—			25,117
IGIS Professional Investors Private Investment Real Estate Investment LLC No 395		16,620		—			(4,678	)		—			11,942
LS Marine Solution Co., Ltd (formerly KT Submarine Co., Ltd.)		—		—			255			23,237	1		23,492
Others		209,084		101,887			(34,912	)		(32,568	)		243,491
	￦	1,480,722	￦	101,387		￦	(35,634	)	￦	10,414		￦	1,556,889

1 The amount represents the fair value of investment at the time the Company lost control (Refer to note above).

(3) Summarized financial information of associates and joint ventures as at and for the years ended December 31, 2022 and 2023, is as follows:

(in millions of Korean won)	December 31, 2022
	Current assets		Non-current assets		Current liabilities		Non-current liabilities
KIF Investment Fund	￦	98,132	￦	414,804	￦	—	￦	—
K Bank Inc.		16,562,742		71,265		14,830,983		2,168
HD Hyundai Robotics Co., Ltd. (formerly Hyundai Robotics Co., Ltd.).		278,413		135,380		63,009		64,335
Megazone Cloud Corporation		857,089		202,767		330,619		94,202
IGIS No. 468-1 General Private Real Estate Investment Company		52,851		—		12		—
KT-DSC Creative Economy Youth Start-up Investment Fund		908		76,884		362		—
IGIS Professional Investors Private Investment Real Estate Investment LLC No. 395		9,344		127,321		90,545		—

F-61

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

(in millions of Korean won)	December 31, 2023
	Current assets		Non-current assets		Current liabilities		Non-current liabilities
KIF Investment Fund	￦	128,344	￦	402,819	￦	—	￦	—
K Bank Inc.		21,320,790		89,812		19,541,076		4,516
HD Hyundai Robotics Co., Ltd. (formerly Hyundai Robotics Co., Ltd.)		251,868		134,424		106,557		9,775
Megazone Cloud Corporation		874,778		267,605		341,679		205,087
IGIS No. 468-1 General Private Real Estate Investment Company		2,985		49,631		11		—
KT-DSC Creative Economy Youth Start-up Investment Fund		482		87,528		101		—
IGIS Professional Investors Private Investment Real Estate Investment LLC No 395		5,690		145,769		107,553		—
LS Marine Solution Co., Ltd. (formerly KT Submarine Co., Ltd.)		66,767		80,307		23,906		207

(in millions of Korean won)	2022
	Operating revenue		Profit (loss) for the year			Other comprehensive income (loss)			Total comprehensive income (loss)			Dividends received from associates
KIF Investment Fund	￦	19,916	￦	7,505		￦	(11,779	)	￦	(4,274	)	￦	6,531
K Bank Inc.		558,872		86,498			(24,888	)		61,610			—
HD Hyundai Robotics Co., Ltd. (formerly Hyundai Robotics Co., Ltd.).		181,944		9,332			(49	)		9,283			—
Megazone Cloud Corporation		1,261,228		(293,186	)		(6,609	)		(299,795	)		—
IGIS No. 468-1 General Private Real Estate Investment Company		9		(3,161	)		—			(3,161	)		—
KT-DSC Creative Economy Youth Start-up Investment Fund		19,931		(53	)		—			(53	)		—
IGIS Professional Investors Private Investment Real Estate Investment LLC No. 395		—		(474	)		—			(474	)		—

F-62

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

(in millions of Korean won)	2023
	Operating revenue		Profit (loss) for the year			Other comprehensive income (loss)			Total comprehensive income (loss)			Dividends received from associates
KIF Investment Fund	￦	33,017	￦	16,330		￦	—		￦	16,330		￦	1,139
K Bank Inc.		946,559		10,560			56,609			67,169			—
HD Hyundai Robotics Co., Ltd. (formerly Hyundai Robotics Co., Ltd.).		167,949		(17,513	)		(1,093	)		(18,606	)		—
Megazone Cloud Corporation		1,410,078		(34,760	)		(3,021	)		(37,781	)		—
IGIS No. 468-1 General Private Real Estate Investment Company		6		(234	)		—			(234	)		—
KT-DSC Creative Economy Youth Start-up Investment Fund		19,849		12,227			—			12,227			—
IGIS Professional Investors Private Investment Real Estate Investment LLC No 395		—		(406	)		—			(406	)		—
LS Marine Solution Co., Ltd (formerly KT Submarine Co., Ltd.)		70,779		11,618			(289	)		11,329			—

(4) Details of a reconciliation of the summarized financial information to the carrying amount of interests in the associates and joint ventures as at and for the years ended December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	2022
	Net assets (a)		Percentage of ownership (b)			Share in net assets (c)=(a)x(b)		Intercompany transaction and others (d)		Book amount (c)+(d)
KIF Investment Fund	￦	512,936		33.33	%	￦	170,979	￦	—	￦	170,979
K Bank Inc.		1,800,856		33.72	%		607,276		245,480		852,756
HD Hyundai Robotics Co., Ltd. (formerly Hyundai Robotics Co., Ltd.)		286,449		10.00	%		28,645		20,727		49,372
Megazone Cloud Corporation		635,035		6.83	%		43,360		92,839		136,199
IGIS No. 468-1 General Private Real Estate Investment Company		52,839		44.64	%		23,589		—		23,589
KT-DSC Creative Economy Youth Start-up Investment Fund		77,430		28.57	%		22,123		—		22,123
IGIS Professional Investors Private Investment Real Estate Investment LLC No. 395		46,120		35.29	%		16,278		342		16,620

F-63

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

(in millions of Korean won)	2023
	Net assets (a)		Percentage of ownership (b)			Share in net assets (c)=(a)x(b)		Intercompany transaction and others (d)			Book amount (c)+(d)
KIF Investment Fund	￦	531,164		33.33	%	￦	177,054	￦	—		￦	177,054
K Bank Inc.		1,865,010		33.72	%		628,910		243,971			872,881
HD Hyundai Robotics Co., Ltd. (formerly Hyundai Robotics Co., Ltd.)		269,960		10.00	%		26,996		20,738			47,734
Megazone Cloud Corporation		547,786		6.83	%		37,404		94,290			131,694
IGIS No. 468-1 General Private Real Estate Investment Company		52,605		44.64	%		23,484		—			23,484
KT-DSC Creative Economy Youth Start-up Investment Fund		87,908		28.57	%		25,117		—			25,117
IGIS Professional Investors Private Investment Real Estate Investment LLC No 395		43,905		35.29	%		15,496		(3,554	)		11,942
LS Marine Solution Co., Ltd (formerly KT Submarine Co., Ltd.)		122,961		7.30	%		8,972		14,520			23,492

(5) Due to discontinuance of equity method of accounting, the Group has not recognized loss from associates and joint ventures of ￦833 million for the year ended December 31, 2023 (2021: ￦717 million, 2022: ￦909 million). The unrecognized accumulated comprehensive loss of associates and joint ventures as of December 31, 2023 is ￦10,748 million (2022: ￦9,915 million).

14. Trade and Other Payables

(1) Details of trade and other payables as of December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	December 31, 2022		December 31, 2023
Current liabilities
Trade payables	￦	1,150,515	￦	1,297,752
Other payables		6,182,650		6,757,170
Total	￦	7,333,165	￦	8,054,922
Non-current liabilities
Trade payables	￦	—	￦	3,202
Other payables		1,064,099		816,356
Total	￦	1,064,099	￦	819,558

F-64

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

(2) Details of other payables as of December 31, 2022 and 2023 are as follows:

(in millions of Korean won)	December 31, 2022			December 31, 2023
Non-trade payables1	￦	4,981,300		￦	5,207,165
Accrued expenses		1,234,023			1,267,700
Operating deposits		818,603			880,810
Others		212,823			217,851
Less: non-current		(1,064,099	)		(816,356	)
Current	￦	6,182,650		￦	6,757,170

1 As of December 31, 2023, credit sale liabilities amounting to ￦2,314,077 million (December 31, 2022: ￦1,754,075 million) held by BC Card Co., Ltd. (a subsidiary of the Group) are included.

15. Borrowings

(1) Details of borrowings as of December 31, 2022 and 2023, are as follows:

1) Debentures

(in millions of Korean won and foreign currencies in thousands)				December 31, 2022				December 31, 2023
Type	Maturity		Annual interest rates	Foreign currency		Korean won		Foreign currency		Korean won
MTNP notes1		Sep. 7, 2034	6.500%		USD 100,000	￦	126,730		USD 100,000	￦	128,940
MTNP notes		Jul. 18, 2026	2.500%		USD 400,000		506,920		USD 400,000		515,760
MTNP notes		Aug. 23, 2023	—		USD 100,000		126,730		—		—
MTNP notes		Jul. 19, 2024	0.330%		JPY 400,000		3,813		JPY 400,000		3,651
MTNP notes		Sep. 1. 2025	1.000%		USD 400,000		506,920		USD 400,000		515,760
FR notes2		Nov. 1, 2024	Compounded SOFR+1.210%		USD 350,000		443,555		USD 350,000		451,290
FR notes		Jun. 19, 2023	—		SGD 284,000		267,843		—		—
MTNP notes		Jan. 21, 2027	1.375%		USD 300,000		380,190		USD 300,000		386,820
MTNP notes		Aug. 08, 2025	4.000%		USD 500,000		633,650		USD 500,000		644,700
The 183-3rd Public bond		Dec. 22, 2031	4.270%		—		160,000		—		160,000
The 184-2nd Public bond		Apr. 10, 2023	—		—		190,000		—		—
The 184-3rd Public bond		Apr. 10, 2033	3.170%		—		100,000		—		100,000
The 186-3rd Public bond		Jun. 26, 2024	3.418%		—		110,000		—		110,000
The 186-4th Public bond		Jun. 26, 2034	3.695%		—		100,000		—		100,000
The 187-3rd Public bond		Sep. 2, 2024	3.314%		—		170,000		—		170,000
The 187-4th Public bond		Sep. 2, 2034	3.546%		—		100,000		—		100,000
The 188-2nd Public bond		Jan. 29, 2025	2.454%		—		240,000		—		240,000
The 188-3rd Public bond		Jan. 29, 2035	2.706%		—		50,000		—		50,000
The 189-3rd Public bond		Jan. 28, 2026	2.203%		—		100,000		—		100,000
The 189-4th Public bond		Jan. 28, 2036	2.351%		—		70,000		—		70,000
The 190-2nd Public bond		Jan. 30, 2023	—		—		150,000		—		—
The 190-3rd Public bond		Jan. 30, 2028	2.947%		—		170,000		—		170,000
The 190-4th Public bond		Jan. 30, 2038	2.931%		—		70,000		—		70,000
The 191-2nd Public bond		Jan. 15, 2024	2.088%		—		80,000		—		80,000
The 191-3rd Public bond		Jan. 15, 2029	2.160%		—		110,000		—		110,000
The 191-4th Public bond		Jan. 14, 2039	2.213%		—		90,000		—		90,000
The 192-2nd Public bond		Oct. 11, 2024	1.578%		—		100,000		—		100,000
The 192-3rd Public bond		Oct. 11, 2029	1.622%		—		50,000		—		50,000
The 192-4th Public bond		Oct. 11, 2039	1.674%		—		110,000		—		110,000
The 193-1st Public bond		Jun. 16, 2023	—		—		150,000		—		—
The 193-2nd Public bond		Jun. 17, 2025	1.434%		—		70,000		—		70,000
The 193-3rd Public bond		Jun. 17, 2030	1.608%		—		20,000		—		20,000
The 193-4th Public bond		Jun. 15, 2040	1.713%		—		60,000		—		60,000

F-65

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

(in millions of Korean won and foreign currencies in thousands)				December 31, 2022				December 31, 2023
Type	Maturity		Annual interest rates	Foreign currency		Korean won		Foreign currency		Korean won
The 194-1st Public bond		Jan. 26, 2024	1.127%		—		130,000		—		130,000
The 194-2nd Public bond		Jan. 27, 2026	1.452%		—		140,000		—		140,000
The 194-3rd Public bond		Jan. 27, 2031	1.849%		—		50,000		—		50,000
The 194-4th Public bond		Jan. 25, 2041	1.976%		—		80,000		—		80,000
The 195-1st Public bond		Jun. 10, 2024	1.387%		—		180,000		—		180,000
The 195-2nd Public bond		Jun. 10, 2026	1.806%		—		80,000		—		80,000
The 195-3rd Public bond		Jun. 10, 2031	2.168%		—		40,000		—		40,000
The 196-1st Public bond		Jan. 27, 2025	2.596%		—		270,000		—		270,000
The 196-2nd Public bond		Jan. 27, 2027	2.637%		—		100,000		—		100,000
The 196-3rd Public bond		Jan. 27, 2032	2.741%		—		30,000		—		30,000
The 197-1st Public bond		Jun. 27, 2025	4.191%		—		280,000		—		280,000
The 197-2nd Public bond		Jun. 29, 2027	4.188%		—		120,000		—		120,000
The 198-1st Public bond		Jan. 10, 2025	3.847%		—		—		—		70,000
The 198-2nd Public bond		Jan. 12, 2026	3.869%		—		—		—		150,000
The 198-3rd Public bond		Jan. 12, 2028	3.971%		—		—		—		80,000
The 199-1st Public bond		Jul. 11, 2025	4.028%		—		—		—		85,000
The 199-2nd Public bond		Jul. 10, 2026	4.146%		—		—		—		160,000
The 199-3rd Public bond		Jul. 12, 2028	4.221%		—		—		—		155,000
The 18-1st unsecured bond		Jul. 2, 2024	1.844%		—		100,000		—		100,000
The 18-2nd unsecured bond		Jul. 2, 2026	2.224%		—		50,000		—		50,000
The 148th Won-denominated unsecured bond		Jun. 23, 2023	—		—		100,000		—		—
The 149-1st Won-denominated unsecured bond		Mar. 8, 2024	1.440%		—		70,000		—		70,000
The 149-2nd Won-denominated unsecured bond		Mar. 10, 2026	1.756%		—		30,000		—		30,000
The 150-1st Won-denominated unsecured bond		Apr. 7, 2023	—		—		20,000		—		—
The 150-2nd Won-denominated unsecured bond		Apr. 8, 2024	1.462%		—		30,000		—		30,000
The 151-1st Won-denominated unsecured bond		May 12, 2023	—		—		10,000		—		—
The 151-2nd Won-denominated unsecured bond		May 14, 2024	1.432%		—		40,000		—		40,000
The 152-1st Won-denominated unsecured bond		Aug. 30, 2024	1.813%		—		80,000		—		80,000
The 152-2nd Won-denominated unsecured bond		Aug. 28, 2026	1.982%		—		20,000		—		20,000
The 153-1st Won denominated unsecured bond		Nov. 10, 2023	—		—		30,000		—		—
The 153-2nd Won-denominated unsecured bond		Nov. 11, 2024	2.425%		—		70,000		—		70,000
The 154th Won-denominated unsecured bond		Jan. 23, 2025	2.511%		—		40,000		—		40,000
The 155-1st Won-denominated unsecured bond		Feb. 29, 2024	2.615%		—		50,000		—		50,000
The 155-2nd Won-denominated unsecured bond		Sep. 2, 2024	2.745%		—		20,000		—		20,000
The 155-3rd Won-denominated unsecured bond		Feb. 28, 2025	2.880%		—		20,000		—		20,000
The 156-1st Won-denominated unsecured bond3		Mar. 25, 2025	5Y CMS+0.404%		—		60,000		—		60,000

F-66

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

(in millions of Korean won and foreign currencies in thousands)				December 31, 2022					December 31, 2023
Type	Maturity		Annual interest rates	Foreign currency		Korean won			Foreign currency		Korean won
The 156-2nd Won-denominated unsecured bond3		Mar. 25, 2032	10Y CMS+0.965%		—		40,000			—		40,000
The 157-1st Won-denominated unsecured bond		Apr. 28, 2023	—		—		30,000			—		—
The 157-2nd Won-denominated unsecured bond		Oct. 27, 2023	—		—		30,000			—		—
The 158th Won-denominated unsecured bond		Jan. 27, 2025	4.421%		—		50,000			—		50,000
The 159-1st Won-denominated unsecured bond		Aug. 09, 2024	4.267%		—		30,000			—		30,000
The 159-2nd Won-denominated unsecured bond		Aug. 11, 2027	4.505%		—		30,000			—		30,000
The 160-1st Won-denominated unsecured bond		Jun. 14, 2024	5.615%		—		20,000			—		20,000
The 160-2nd Won-denominated unsecured bond		Dec. 13, 2024	5.667%		—		20,000			—		20,000
The 160-3rd Won-denominated unsecured bond		Dec. 12, 2025	5.769%		—		30,000			—		30,000
The 161-1st Won-denominated unsecured bond		Jun. 21, 2024	5.527%		—		10,000			—		10,000
The 161-2nd Won-denominated unsecured bond		Dec. 20, 2024	5.557%		—		20,000			—		20,000
The 161-3rd Won-denominated unsecured bond		Jun. 20, 2025	5.594%		—		30,000			—		30,000
The 161-4th Won-denominated unsecured bond		Dec. 22, 2025	5.615%		—		10,000			—		10,000
The 162-1st Won-denominated unsecured bond		Dec. 27, 2023	—		—		50,000			—		—
The 162-2nd Won-denominated unsecured bond		Jan. 26, 2024	5.069%		—		40,000			—		40,000
The 162-3rd Won-denominated unsecured bond		Apr. 26, 2024	5.080%		—		10,000			—		10,000
The 163-1st Won-denominated unsecured bond		Feb. 20, 2026	4.059%		—		—			—		20,000
The 163-2nd Won-denominated unsecured bond		Feb. 22, 2028	4.311%		—		—			—		80,000
The 164-1st Won-denominated unsecured bond		Apr. 12, 2024	3.778%		—		—			—		10,000
The 164-2nd Won-denominated unsecured bond		Oct. 24, 2024	3.821%		—		—			—		30,000
The 164-3rd Won-denominated unsecured bond		Apr. 14, 2028	4.220%		—		—			—		30,000
The 165-1st Won-denominated unsecured bond		May. 09, 2025	3.870%		—		—			—		30,000
The 165-2nd Won-denominated unsecured bond		Nov. 09, 2026	3.932%		—		—			—		10,000
The 165-3rd Won-denominated unsecured bond		May. 07, 2027	3.972%		—		—			—		30,000
The 166-1st Won-denominated unsecured bond		Nov. 22. 2024	4.205%		—		—			—		20,000
The 166-2nd Won-denominated unsecured bond		Apr. 22. 2025	4.310%		—		—			—		40,000
The 166-3rd Won-denominated unsecured bond		May. 21. 2025	4.332%		—		—			—		10,000
The 166-4th Won-denominated unsecured bond		May. 22. 2025	4.332%		—		—			—		40,000
The 167-1st Won-denominated unsecured bond		Dec. 20. 2024	3.865%		—		—			—		30,000
The 167-2nd Won-denominated unsecured bond		Jan. 22. 2025	3.864%		—		—			—		50,000
The 167-3rd Won-denominated unsecured bond		Feb. 21. 2025	3.864%		—		—			—		10,000
The 167-4th Won-denominated unsecured bond		Dec. 22. 2025	3.858%		—		—			—		10,000
Subtotal							8,406,351					8,446,921
Less: Current portion							(1,154,101	)				(1,924,523	)
Discount on bonds							(23,728	)				(19,248	)
Total						￦	7,228,522				￦	6,503,150

1 As of December 31, 2023, the Controlling Company has outstanding notes in the amount of USD 100 million with fixed interest rates under Medium Term Note Program (“MTNP”) registered in the Singapore Stock Exchange, which allowed issuance of notes of up to USD 2,000 million. However, the MTNP has been terminated since 2007.

2 The Daily SOFR is approximately 5.380% as of December 31, 2023. Due to the recent suspension of LIBOR calculation, the Group changed the alternative indicator interest rate to Compounded SOFR+1.210 %.

3 The CMS (5Y) and CMS (10Y) is approximately 2.993% and 2.990%, respectively as of December 31, 2023.

F-67

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

2) Convertible bonds

(in millions of Korean won)
Type	Issuance Date		Maturity		Annual interest Rate		December 31, 2022			December 31, 2023
The 1st CB (Private)1		Jun. 5, 2020		Jun. 5, 2025		2	￦	8,000		￦	8,000
The 1st unsecured CB3		Jul. 25, 2022		Jan. 25, 2025		—		30,000			—
Redemption premium								4,565			2,267
Bond discount issuance								(7,206	)		(1,811	)
Subtotal								35,359			8,456
Current portion								—			(8,456	)
Total							￦	35,359		￦	—

1 Common shares of Storywiz are subject to conversion (appraisal period: June 5, 2021~May 4, 2025).

2 Nominal interest rate and maturity yield is approximately 0% and 5%, respectively, and will be settled on maturity.

3 During the current period, bonds of kt cloud are converted to 73,800 of Common shares and 73,800 of preference shares.

3) Borrowings

a. Short-term borrowings

(in millions of Korean won)			December 31, 2022				December 31, 2023
Type	Financial institution	Annual interest rates	Foreign currency		Korean won		Foreign currency		Korean won
Operational	Shinhan Bank	3.840%~6.430%		—	￦	105,000		—	￦	151,500
		—		—		30,000		—		—
	Woori Bank1,	—		—		50,000		—		—
		4.400%				—				70,000
		CD(91D)+1.960%		—		—		—		20,000
	Korea Development Bank	3.230%~4.950%		—		27,201		—		34,900
	Industrial Bank of Korea	4.862%		—		6,000		—		6,000
	Hana Bank1	CD(91D)+0.126%		—		5,000		—		4,800
	KB SECURITIES	4.110%~4.910%		—		94,822		—		69,635
	NH INVESTMENT & SECURITIES	—		—		20,000		—		—
	HSBC2	Compounded SOFR +2.100%		USD 18,500		23,451		USD 23,600		30,450
	NongHyup Bank	4.880%		—		9,000		—		8,500
		—		—		15,000		—		—
	IBK Securities	—		—		20,000		—		—
	Hi Investment & Securities	—		—		99,524		—		—
	Korea Investment	4.910%		—		—				30,000
				Total			￦	504,998	￦	425,785

1 CD (91D) is approximately 3.820% as of December 31, 2023.

2 The Daily SOFR is approximately 5.380% as of December 31, 2023.

F-68

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

b. Long-term borrowings

(in millions of Korean won and thousands of foreign currencies)			December 31, 2022					December 31, 2023
Financial institution	Type	Annual interest rates	Foreign currency		Korean won			Foreign currency		Korean won
Export-Import Bank of Korea	Inter-Korean Cooperation Fund1	1.00%		—	￦	1,974			—	￦	1,480
CA-CIB	General loans	3.380%~4.150%		—		200,000			—		200,000
JPM	General loans	2.700%~4.480%		—		100,000			—		200,000
DBS	General loans	4.079%		—		100,000			—		100,000
Shinhan Bank	General loans2	Term SOFR(3M)+1.100%		USD 8,910		11,292			USD 8,910		11,489
	General loans	—		USD 38,000		48,158			—		—
	General loans	1.900%~3.200%		USD 31,472		39,855			USD 31,472		40,655
	General loans3	4.490%		—		62,398			—		62,398
	General loans2	Term SOFR(3M)+1.300%		USD 21,127		26,774			USD 21,127		27,241
	General loans2	Term SOFR(3M)+1.940%		—		—			USD 35,000		45,129
	General loans2	CD(91D)+1.800%		—		—			—		16,900
	General loans2	EURIBOR(3M)+0.900%		EUR 7,700		10,404			EUR 7,700		10,985
Woori Bank	General loans	3.320%~5.800%		—		15,000			—		41,526
	PF loans	—		—		40,682			—		—
Hi Investment & Securities	CP	2.302%		—		90,724			—		92,994
Bookook Investment	CP	3.490%~3.603%		—		18,806			—		19,525
Korea Investment	CP	3.622%		—		73,039			—		75,928
Korea Development Bank	General loans	3.000%~4.870%		—		38,000			—		137,000
NH Jayang	PF loans2	CD(91D)+1.150%		—		59,066			—		53,033
Kyobo Life Insurance	PF loans2	CD(91D)+1.150%~CD(91D) +3.450%		—		66,390			—		84,586
Standard Chartered Bank Korea	PF loans2	CD(91D)+1.150%~CD(91D) +3.450%		—		44,260			—		56,390
General loans2		CD(91D)+0.750%		—		—			—		32,000
Samsung Life Insurance	PF loans	1.860%~4.160%		—		36,883			—		46,992
Subtotal						1,083,705					1,356,251
Less: Current portion						(167,943	)				(699,800	)
					￦	915,762				￦	656,451

1 The above Inter-Korean Cooperation Fund is repayable in installments over 13 years after a seven-year grace period.

2 EURIBOR (3M), Term SOFR (3M) and CD (91D) are approximately 3.909%, 5.331%, 3.820% respectively, as of December 31, 2023.

3 The general loans are repayable in installments over 4 years after a three-year grace period.

F-69

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

(2) Repayment schedule of the Group’s debentures and borrowings including the portion of current liabilities as of December 31, 2023, is as follows:

(in millions of Korean won)
	Bonds						Borrowings						Total
	In local currency		In foreign currency		Sub- total		In local currency		In foreign currency		Sub- total
Jan. 1, 2024 ~ Dec. 31, 2024	￦	1,478,000	￦	454,941	￦	1,932,941	￦	1,016,254	￦	109,331	￦	1,125,585	￦	3,058,526
Jan. 1, 2025 ~ Dec. 31, 2025		1,445,000		1,160,460		2,605,460		421,322		56,618		477,940		3,083,400
Jan. 1, 2026 ~ Dec. 31, 2026		760,000		515,760		1,275,760		109,087		—		109,087		1,384,847
Jan. 1, 2027 ~ Dec. 31, 2027		280,000		386,820		666,820		15,600		—		15,600		682,420
After Jan. 1, 2028		1,845,000		128,940		1,973,940		53,825		—		53,825		2,027,765
Total	￦	5,808,000	￦	2,646,921	￦	8,454,921	￦	1,616,088	￦	165,949	￦	1,782,037	￦	10,236,958

16. Provisions

Changes in provisions for the years ended December 31, 2022 and 2023, are as follows:

	2022
(in millions of Korean won)	Litigation			Restoration cost			Others			Total
Beginning balance	￦	80,165		￦	107,358		￦	69,874		￦	257,397
Increase (Transfer)		6,005			13,027			5,847			24,879
Usage		(6,155	)		(8,143	)		(15,783	)		(30,081	)
Reversal		(43,686	)		(3,685	)		(4,418	)		(51,789	)
Others		—			405			(445	)		(40	)
Ending balance	￦	36,329		￦	108,962		￦	55,075		￦	200,366
Current		34,730			19,918			54,485			109,133
Non-current	￦	1,599		￦	89,044		￦	590		￦	91,233
	2023
(in millions of Korean won)	Litigation			Restoration cost			Others			Total
Beginning balance	￦	36,329		￦	108,962		￦	55,075		￦	200,366
Increase (Transfer)		592			26,381			10,656			37,629
Usage		(7,179	)		(1,138	)		(6,391	)		(14,708	)
Reversal		(35	)		(653	)		(2,096	)		(2,784	)
Scope change		—			—			(177	)		(177	)
Others		—			(393	)		2,290			1,897
Ending balance	￦	29,707		￦	133,159		￦	59,357		￦	222,223
Current	￦	29,130		￦	26,945		￦	59,134		￦	115,209
Non-current		577			106,214			223			107,014

F-70

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

17. Net Defined Benefit Liabilities (Assets)

(1) The amounts recognized in the statements of financial position as of December 31, 2022 and 2023, are determined as follows:

(in millions of Korean won)	December 31, 2022			December 31, 2023
Present value of defined benefit obligations	￦	2,218,655		￦	2,365,793
Fair value of plan assets		(2,478,143	)		(2,462,925	)
Liabilities	￦	51,654		￦	63,616
Assets	￦	311,142		￦	160,748

(2) Changes in the defined benefit obligations for the years ended December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	2022			2023
Beginning	￦	2,494,930		￦	2,218,655
Current service cost		238,068			213,489
Interest expense		59,041			103,874
Benefit paid		(316,047	)		(358,298	)
Changes due to settlements of plan & Past Service Cost		(701	)		1
Remeasurements:
Actuarial gains (losses) arising from changes in demographic assumptions		(13,048	)		1,903
Actuarial gains (losses) arising from changes in financial assumptions		(323,501	)		138,462
Actuarial gains arising from experience adjustments		80,845			48,174
Acquisition and disposition of businesses, etc.		(932	)		(467	)
Ending	￦	2,218,655		￦	2,365,793

(3) Changes in the fair value of plan assets for the years ended December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	2022			2023
Beginning	￦	2,314,632		￦	2,478,143
Interest income		55,902			121,336
Remeasurements:
Return on plan assets (excluding amounts included in interest income)		(8,542	)		9,410
Benefits paid		(287,419	)		(307,762	)
Employer contributions		401,358			165,128
Acquisition and disposition of businesses, etc.		2,212			(3,330	)
Ending	￦	2,478,143		￦	2,462,925

F-71

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

(4) Amounts recognized in the consolidated statements of profit or loss for the years ended December 31, 2021, 2022 and 2023, are as follows:

(in millions of Korean won)	2021			2022			2023
Current service cost	￦	249,125		￦	238,068		￦	213,922
Net Interest cost		5,047			3,139			(17,462	)
Changes due to settlements of plan & Past Service Cost		(681	)		(701	)		1
Transfer out		(16,660	)		(15,102	)		(13,435	)
Total expenses	￦	236,831		￦	225,404		￦	183,026

(5) Principal actuarial assumptions used are as follows:

	December 31, 2021		December 31, 2022		December 31, 2023
Discount rate		2.1%~3.70%		2.4%~6.29%		3.67%~5.51%
Salary growth rate		1%~6.97%		1.82%~8.9%		1.7%~8.96%

(6) The sensitivity of the defined benefit obligations as of December 31, 2023, to changes in the principal assumptions is:

(In percentage, in millions of Korean won )	Effect on defined benefit obligation
	Changes in assumption	Increase in assumption		Decrease in assumption
Discount rate	0.5% point		￦(139,461)	￦	150,568
Salary growth rate	0.5% point		145,687		(135,431	)

A decrease in corporate bond yields will increase plan liabilities, although this will be partially offset by an increase in the value of the plans’ bond holdings.

The above sensitivity analysis is based on an assumption while holding all other assumptions constant. In practice, this is unlikely to occur, and changes in some of the assumptions may be correlated. The sensitivity of the defined benefit obligation to changes in principal actuarial assumptions is calculated using the projected unit credit method, the same method applied when calculating the defined benefit obligations recognized on the statement of financial position.

(7) Effect of defined benefit plan on future cash flows

The Group actively monitors how the duration and the expected yield of the investments match the expected cash outflows arising from the pension obligations. Expected contributions to post-employment benefit plans for the year ending December 31, 2023, are ￦273,503 million.

The expected maturity analysis of undiscounted pension benefits as of December 31, 2023, is as follows:

(in millions of Korean won)	Less than 1 year		Between 1- 2 years		Between 2- 5 years		Over 5 years		Total
Pension benefits	￦	257,315	￦	376,352	￦	910,076	￦	2,013,167	￦	3,556,910

The weighted average duration of the defined benefit obligations is 6.2 years.

18. Defined Contribution Plan

Recognized expense related to the defined contribution plan for the year ended December 31, 2023, is ￦85,174 million (2021: ￦71,068 million, 2022: ￦72,576 million).

F-72

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

19. Commitments and Contingencies

(1) As of December 31, 2023, major commitments with local financial institutions are as follows:

(in millions of Korean won and foreign currencies in thousands)	Financial institution	Limit		Used amount
Bank overdraft	Kookmin Bank and others		374,000		—
Inter-Korean Cooperation Fund	Export-Import Bank of Korea		37,700		1,480
Economic Cooperation Business Insurance	Export-Import Bank of Korea		3,240		1,732
Collateralized loan on electronic accounts receivable-trade	Kookmin Bank and others		545,350		42,822
Plus electronic notes payable	Industrial Bank of Korea		50,000		885
Working capital loan	Korea Development Bank and others		1,562,800		142,700
	Shinhan Bank		USD 76,509		USD 76,509
	Woori Bank		EUR 7,700		EUR 7,700
Facility loans	Shinhan Bank and others		924,000		429,924
Derivatives transaction limit	Korea Development Bank and others		USD 1,970,000		USD 1,970,000
Citi Bank			JPY 400,000		JPY 400,000
Total	KRW		3,497,090		619,543
	USD		2,046,509		2,046,509
	EUR		7,700		7,700
	JPY		400,000		400,000

(2) As of December 31, 2023, guarantees received from financial institutions are as follows:

(in millions of Korean won and foreign currencies in thousands)	Financial institution	Limit
Hana Bank	Guarantee for payment in Korean currency		4,000
	Comprehensive credit line and others		3,100
	Guarantee for payment in foreign currency		USD 59
	Comprehensive credit line and others		USD 10,300
Kookmin Bank	Guarantee for payment in foreign currency		USD 3,186
Shinhan Bank	Guarantee for payment in Korean currency and others		USD 94,517
	Guarantee for payment in foreign currency and others		VND 211,262
Woori Bank	Guarantee for payment in Korean currency		5,200
	Guarantee for payment in foreign currency		USD 7,000
Korea Development Bank	Refund guarantee for advances received		USD 6,811
HSBC	Guarantees for depositions		USD 816
Seoul Guarantee Insurance Company	Performance guarantee and others		366,395
Korea Software Financial Cooperative	Performance guarantee and others		1,556,979
Korea Specialty Contractor Financial Cooperative	Performance guarantee and others		135
Korea Housing Finance Corporation	Performance guarantee and others		44,000

F-73

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

(in millions of Korean won and foreign currencies in thousands)	Financial institution	Limit
Korea Housing & Urban Guarantee Corporation1	Performance guarantee and others		691,530
Information & Communication Financial Cooperative	Performance guarantee and others		78,183
Total	KRW		2,749,522
	USD		122,689
	VND		211,262

1 Inventory assets(￦278,031 million) and investment properties(￦283,688 million) are provided as collateral with commitment respectively, as of December 31, 2023.

(3) As of December 31, 2023, guarantees provided by the Group to a third party, are as follows:

(in millions of Korean won)	Subject to payment guarantees	Creditor	Limit		Used amount		Period
KT Estate Inc	Wonju Bando U-bora Mark Bridge Buyer	Hana Bank		103,000		55,314		Aug. 5, 2022 ~ Feb. 28, 2025
KT Engineering Co., Ltd.1	Gasan Solar Power Plant Inc.	Shinhan Bank		4,700		364		Jan. 7, 2010 ~ Jan. 8, 2025
KT Engineering Co., Ltd.1	Korea Cell Inc.	Suhyup Bank		3,250		50		Feb. 17, 2014 ~ Feb. 16, 2024
KT Engineering Co., Ltd.1	San-Ya Agricultural Association Corporation	Suhyup Bank		3,250		51		Feb. 17, 2014 ~ Feb. 16, 2024
KT Alpha Co., Ltd.	Cash payers	T-commerce cash payers		821		—		Apr. 14, 2023 ~ Apr. 12, 2024
Nasmedia Co., Ltd.	Stockholders Association Members	Korea Securities Finance Corp		1,104		610		—

1 KT Engineering Co., Ltd., a subsidiary of the Group, is subject to payment, depending on the reimbursement of principal debtor.

(4) The Controlling Company is jointly and severally obligated with KT Sat Co., Ltd., a subsidiary, to pay KT Sat Co., Ltd.’s liabilities incurred prior to spin-off. As of December 31, 2023, the Controlling Company and KT Sat Co., Ltd. are jointly and severally liable for reimbursement of ￦595 million.

(5) For the year ended December 31, 2023, the Group entered into agreements with the Securitization Specialty Companies (2023: First 5G 67th to 72th Securitization Specialty Co., Ltd., 2022: First 5G 61st to 66th Securitization Specialty Co., Ltd.) and disposed of its trade receivables related to handset sales. The Group also made asset management agreements with each securitization specialty company and in accordance with the agreement, the Group will receive asset management fees upon liquidation of the securitization specialty company.

(6) As of December 31, 2023, the Group is a defendant in 177 lawsuits with the total claimed amount of ￦167,834 million (2022: ￦80,279 million). As of December 31, 2023, litigation provisions of ￦29,707 million for pending lawsuits and unasserted claims are recorded as liabilities for potential loss in the ordinary course of business. The final outcomes of the cases cannot be estimated as of December 31, 2023.

(7) Under the agreement of bond issuance and borrowings, the Group is required to maintain certain financial ratios such as debt-to-equity ratio, use the funds for the designated purpose

F-74

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

and report to the creditors periodically. The covenant also contains restriction on provision of additional collateral and disposal of certain assets.

(8) As of December 31, 2023, the Group participates in Algerie Sidi Abdela new town development consortium (percentage of ownership: 2.5%) and has joint liability with other consortium participants.

(9) As of December 31, 2023, contract amount of property and equipment acquisition agreement made but not yet recognized amounts to ￦489,231 million (2022: ￦1,294,823 million).

(10) As of December 31, 2023, there are derivatives generated by the Group granting Drag-Along Right to financial investors participating in paid-in capital increase of K Bank (Note 7).

(11) The Group has an agreement with a transferor participated in share transfer agreement of MILLE Co., Ltd. As per the conditions of the agreement, the transferor may exercise Put Option for the ordinary shares it owns (Note 7).

(12) The Group entered into an agreement with financial investors of Epsilon Global Communications Pte. If certain conditions are not met in the future as disclosed in the terms and conditions of the agreement, financial investors may exercise Tag-Along Right, Drag-Along Right and the right to sell shares for the convertible preferred shares it owns (Note 7).

(13) The Group has an obligation for additional contributions as per agreement to Future Innovation Private Equity Fund No.3 and others. As of December 31, 2023, remaining amount of ￦4,132 million and USD 30,350 thousand will be invested through the Capital Call method in the future.

(14) The Group has the amount of ￦201,615 million (40%) of joint responsibility obligation and ￦302,423 million (60%) of obligation to provide financial support as a construction investor during the construction period with respect to K Defense Co., Ltd. established in accordance with the Private Investment Act on Social Infrastructure. During the operating period, the Group has the amount of ￦438,312 million (100%) of obligation to provide financial support as an operating investor.

(15) During the prior period, the Group entered into a stock sale contract with HYUNDAI MOBIS and HYUNDAI MOTOR COMPANY. If a certain period of time has elapsed from the date of the contract and the acquired stocks are to be disposed to a third party, HYUNDAI MOBIS and HYUNDAI MOTOR COMPANY may exercise a preferential purchase right to designate a buyer with priority.

(16) During the prior period, the Group entered into an agreement with LS Cable & System Ltd., which participated in the stock acquisition contract of KT Submarine Co., Ltd. (formerly KT Submarine Co., Ltd.). As per the agreement, the Group may exercise a put-option to LS Cable & System Ltd in the future (Note 7).

(17) During the period, the Group entered into an agreement with equity investors which participated in the stock acquisition contract of KT cloud Co., Ltd., Under the agreement, in specific occasion, equity investors may exercise a Tag-along or put-option to the Group in the future.

(18) The Group has the obligation of paying Minimum Guarantee as utilizing product bundling of Tving Co.,Ltd. and the right to be paid certain proportion of the excess as per agreement.

F-75

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

20. Leases

Information of leases in which the Group is a lessee is as follows. Information when the Group is a lessor is described in Note 11.

(1) Amounts recognized in the consolidated statements of financial position

The consolidated statement of financial position shows the following amounts relating to leases:

(in millions of Korean won)	December 31, 2022		December 31, 2023
Right-of-use assets
Property and building	￦	1,081,067	￦	1,019,537
Machinery and communication line facilities		50,794		89,150
Others		148,473		196,276
Total	￦	1,280,334	￦	1,304,963
(in millions of Korean won)	December 31, 2022		December 31, 2023
Lease liabilities1
Current	￦	315,892	￦	307,868
Non-Current		856,146		872,042
Total	￦	1,172,038	￦	1,179,910

1 Included in the line items ‘Other current liabilities and other non-current liabilities’ in the consolidated statements of financial position (Notes 9).

For the years ended December 31, 2022 and 2023, Right-of-use assets related to leases increased by ￦405,453 million and ￦440,552 million, respectively.

(2) Amounts recognized in the consolidated statements of profit or loss

The consolidated statement of profit or loss relating to leases for the year ended December 31, 2021,2022 and 2023 are as follows:

(in millions of Korean won)	December 31, 2021		December 31, 2022		December 31, 2023
Depreciation of Right-of-use assets
Property and building	￦	303,984	￦	305,120	￦	297,571
Machinery and communication line facilities		41,794		31,140		32,794
Others		52,938		59,954		72,372
Total	￦	398,716	￦	396,214	￦	402,737
Depreciation of Investment Properties	￦	1,794	￦	15	￦	—
Interest expense relating to lease liabilities		36,651		41,469		52,035
Expense relating to short-term leases		7,984		12,876		8,804
Expense relating to leases of low-value assets that are not short-term leases		26,033		26,813		26,290
Expense relating to variable lease payments not included in lease liabilities		8,400		4,827		9,288

F-76

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

The total cash outflow for leases for the year ended December 31, 2023 amounts to ￦500,392 million (2021: ￦468,360 million, 2022: ￦464,337 million).

21. Share Capital

As of December 31, 2022 and 2023, the Group has 1,000,000,000 shares authorized to issue and details are as follows:

December 31, 2022

December 31, 2023

Number of issued shares

Par value per share (Korean won)

Ordinary Shares (in millions of Korean won)

Number of issued shares

Par value per share (Korean won)

Ordinary Shares (in millions of Korean won)

Ordinary shares1

261,111,808

￦5,000

￦1,564,499

257,860,760

￦5,000

￦1,564,499

1 The Group retired 55,039,007 treasury shares against retained earnings. Based on the local regulations in Korea, upon retirement of shares, the Company has decreased the number of shares issued but has not decreased the ordinary shares capital.

22. Retained Earnings

Details of retained earnings as at December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	December 31, 2022		December 31, 2023
Legal reserve1	￦	782,249	￦	782,249
Voluntary reserves2		4,651,362		4,651,362
Unappropriated retained earnings		8,821,705		9,042,256
Total	￦	14,255,316	￦	14,475,867

1 The Commercial Code of the Republic of Korea requires the Controlling Company to appropriate, as a legal reserve, an amount equal to a minimum of 10% of cash dividends paid until such reserve equals 50% of its issued share capital. The reserve is not available for the payment of cash dividends but may be transferred to share capital with the approval of the Controlling Company’s Board of Directors or used to reduce accumulated deficit, if any, with the ratification of the Controlling Company’s majority shareholders.

2 The reserves of research and development of human resources in other surplus reserves are separately accumulated on disposal of retained earnings on tax filing adjustments when calculating income taxes in accordance with regulations of Tax Reduction and Exemption Control Act of Korea. Reversal of the reserves according to the relevant tax law can be paid out as dividends

F-77

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

23. Accumulated Other Comprehensive Income and Other Components of Equity

(1) As of December 31, 2022 and 2023, the details of the Controlling Company’s accumulated other comprehensive income are as follows:

(in millions of Korean won)	December 31, 2022			December 31, 2023
Changes in investments in associates and joint ventures	￦	(11,752	)	￦	4,023
Gain (loss) on derivatives valuation		(7,109	)		(29,361	)
Gain (loss) on valuation of financial assets at fair value through other comprehensive income		(52,100	)		73,928
Exchange differences on translation for foreign operations		(6,815	)		3,817
Total	￦	(77,776	)	￦	52,407

(2) Changes in accumulated other comprehensive income for the years ended December 31, 2022 and 2023, are as follows:

	2022
( in millions of Korean won)	Beginning			Increase/ decrease			Reclassification to gain or loss			Ending
Changes in investments in associates and joint ventures	￦	(3,461	)	￦	(8,291	)	￦	—		￦	(11,752	)
Gain (loss) on derivatives valuation		25,031			63,281			(95,421	)		(7,109	)
Gain on valuation of financial assets at fair value through other comprehensive income		108,685			(160,785	)		—			(52,100	)
Exchange differences on translation for foreign operations		(12,786	)		5,971			—			(6,815	)
Total	￦	117,469		￦	(99,824	)	￦	(95,421	)	￦	(77,776	)

	2023
(in millions of Korean won)	Beginning			Increase (decrease)		Reclassification to gain or loss			Ending
Changes in investments in associates and joint ventures	￦	(11,752	)	￦	15,775	￦	—		￦	4,023
Gain (loss) on derivatives valuation		(7,109	)		15,690		(37,942	)		(29,361	)
Gain (loss) on valuation of financial assets at fair value through other comprehensive income		(52,100	)		126,028		—			73,928
Exchange differences on translation for foreign operations		(6,815	)		10,632		—			3,817
Total	￦	(77,776	)	￦	168,125	￦	(37,942	)	￦	52,407

F-78

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

(3) The Group’s other components of equity as at December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	December 31, 2022			December 31, 2023
Treasury stock	￦	(202,295	)	￦	(398,075	)
Gain or loss on disposal of treasury stock 1		(41,503	)		3,220
Share-based payments		6,222			8,773
Equity transactions within consolidated entities 2		(334,576	)		(416,336	)
Total	￦	(572,152	)	￦	(802,418	)

1 The amount directly reflected in equity is ￦101 million for the year ended December 31, 2023 (2022: ￦14,886 million).

2 Profit or loss incurred from transactions with non-controlling interest and investment difference incurred from changes in ownership of subsidiaries are included.

(4) As of December 31, 2022 and 2023, the details of treasury stock are as follows:

	December 31, 2022		December 31, 2023
Number of shares (in shares)		5,069,130		11,447,338
Amounts (in millions of Korean won)	￦	202,295	￦	398,075

Treasury stocks held as of December 31, 2023, are expected to be used for stock compensation for the Group’s directors, employees, and other purposes.

24. Share-based Payments

(1) Details of share-based payments granted by the Controlling to executives and employees, including the CEO, by the resolution of the Board of Directors for the years ended December 31, 2022 and 2023, are as follows:

	2022
(in share)	16th grant
Grant date	June 9, 2022
Grantee	CEO, internal directors, external directors, executives
Vesting conditions	Service condition: 1 year Non-market performance condition: achievement of performance
Fair value per option (in Korean won)	￦36,941
Total compensation costs (in Korean won)	￦9,442 million
Exercise date	July 17, 2023
Valuation method	Fair value method

F-79

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

	2023
(in share)	17th grant
Grant date	June 15, 2023, Oct 17, 2023
Grantee	CEO, internal directors, external directors, executives
Vesting conditions	Service condition: 1 year Non-market performance condition: achievement of performance
Fair value per option (in Korean won)	￦30,205
Total compensation costs (in Korean won)	￦7,262 million
Estimated exercise date (exercise date)	During 2024
Valuation method	Fair value method

(2) Changes in the number of stock options and the weighted-average exercise price as at December 31, 2022 and 2023, are as follows:

(In share)	2022
	Beginning		Grant		Expired			Exercised1			Ending		Number of shares exercisable
15th grant		284,209		—		(155,286	)		(128,923	)		—		—
16th grant		—		258,509		—			—			258,509		—
Total		284,209		258,509		(155,286	)		(128,923	)		258,509		—
(In share)	2023
	Beginning		Grant		Expired			Exercised1			Ending		Number of shares exercisable
16th grant		258,509		—		(105,859	)		(131,690	)		20,960		—
17th grant		—		307,182		—			—			307,182		—
Total		258,509		307,182		(105,859	)		(131,690	)		328,142		—

1 The weighted average price of ordinary shares at the time of exercise, during the year ended December 31, 2023 is ￦29,550 (2022: ￦35,450).

25. Revenue from Contracts with Customers, Other Income and Relevant Contract Assets and Liabilities

(1) The Group has recognized the following amounts relating to revenue and other income in the statement of profit or loss:

(in millions of Korean won)	2021		2022		2023
Revenue from contracts with customers	￦	24,712,128	￦	25,432,727	￦	26,063,185
Revenue from other sources		185,877		206,128		224,016
Other income (Note 26)		307,654		595,351		308,044
Total revenue and other income	￦	25,205,659	￦	26,234,206	￦	26,595,245

F-80

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

(2) Operating revenues and other income for the years ended December 31, 2021, 2022 and 2023 are as follows:

(in millions of Korean won)	2021		2022		2023
Mobile services	￦	6,936,485	￦	7,013,889	￦	7,140,333
Fixed-line services		4,960,338		5,056,513		5,142,359
Fixed-line and VoIP telephone services		1,465,059		1,378,265		1,249,024
Broadband Internet access services		2,343,591		2,504,833		2,578,558
Data communication services		1,151,689		1,173,415		1,314,777
Media and content		2,800,630		3,099,776		3,206,521
Financial services		3,661,896		3,836,589		3,967,763
Sale of goods		3,532,973		3,393,646		3,292,514
Others		3,313,337		3,833,793		3,845,755
Total	￦	25,205,659	￦	26,234,206	￦	26,595,245

Mobile and fixed-line service

Telecommunication service revenues include mobile and fixed-line (e.g., fixed-line and VoIP telephone, broadband internet access services and data communication services). These services represent a series of distinct services that are considered a separate performance obligation. Service revenue is recognized when services are provided, based upon either usage (e.g., minutes of traffic/bytes of data processed) or period of time (e.g., monthly service fees).

Media and content services

Revenue from media and content services primarily consists of installation fees and basic monthly charges of IPTV and satellite TV services, as well as revenue from digital content distribution, digital music streaming and downloading. Media and contents services revenue are recognized when services are provided, based upon either usage or period of time.

Financial services

Financial services primarily include commissions for merchant fees paid by merchants to credit card companies for processing transactions. Revenue from the commission is recognized when the service obligation is performed.

Sale of goods

Revenue from sale of goods, primarily handsets related to our mobile services is recognized when a performance obligation is satisfied by transferring promised goods to customers.

(3) Contract assets and liabilities recognized in relation to the revenues from contracts with customers, are as follows:

(in millions of Korean won)	December 31, 2022		December 31, 2023
Contract assets1	￦	963,133	￦	1,130,745
Contract liabilities1		344,869		311,023
Deferred revenue2	￦	81,653	￦	81,067

F-81

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

1 The Group recognized contract assets of ￦308,821million and contract liabilities of ￦32,274 million for long-term construction contract as of December 31, 2023 (2022: contract assets of ￦160,880 million and contract liabilities of ￦60,762 million). The Group recognizes contract assets as trade receivables and other receivables, and contract liabilities as other current liabilities.

2 Deferred revenue recognized relating to government grant is excluded.

(4) The contract costs recognized as assets are as follows:

(in millions of Korean won)	2021		2022		2023
Incremental cost of contract establishment	￦	1,726,401	￦	1,744,096	￦	1,656,711
Cost of Contract performance		74,843		73,582		70,757

As at December 31, 2023, the Group recognized ￦1,759,586 million (2021: ￦1,842,621 million, 2022: ￦1,793,013 million) of operating expenses related to contract cost assets.

(5) The recognized revenue arising from carried-forward contract liabilities from prior year is as follows:

(in millions of Korean won)	2021		2022		2023
Revenue recognized that was included in the contract liabilities balance at the beginning of the year
Allocation of the transaction price	￦	275,965	￦	246,843	￦	213,609
Deferred revenue of joining/installment fee		42,100		44,204		41,824
Total	￦	318,065	￦	291,047	￦	255,433

26. Other Income

Other income for the years ended December 31, 2021, 2022 and 2023, are as follows:

(in millions of Korean won)	2021		2022		2023
Gains on disposal of property and equipment and investment properties	￦	54,007	￦	52,603	￦	22,447
Gains on disposal of intangible assets		1,726		622		1,727
Gain on disposal of right-of-use assets		3,138		3,326		3,580
Property and Equipment loss recovery income		148,927		159,849		152,712
Income from government subsidies		43,822		44,473		40,725
Gain on disposal of investments in associates		5		38,319		6,982
Gain on disposal of investments in subsidiaries		244		216,591		28,825
Others1		55,785		79,568		51,046
Total	￦	307,654	￦	595,351	￦	308,044

1 Certain amounts that were previously reported in the table above have been grouped as Others.

F-82

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

27. Operating Expenses

(1) Operating expenses for the years ended December 31, 2021, 2022 and 2023, are as follows:

(in millions of Korean won)	2021		2022			2023
Employee benefit cost	￦	4,215,810	￦	4,495,885		￦	4,556,832
Depreciation		2,605,594		2,637,463			2,723,610
Depreciation of right-of-use assets		398,716		396,214			402,737
Amortization of intangible assets		603,327		622,202			683,784
Commissions		1,125,944		1,295,434			1,264,729
Interconnection charges		507,567		479,500			436,598
International interconnection fee		192,008		186,253			140,433
Purchase of inventories		3,753,792		3,656,040			3,595,345
Changes of inventories		20,491		(195,046	)		(203,071	)
Sales commission		2,343,375		2,353,909			2,353,318
Service cost1		2,296,324		2,334,386			2,229,709
Utilities		364,373		368,348			544,675
Taxes and dues		268,651		276,962			250,651
Rent		123,246		160,848			167,576
Insurance premium		66,717		68,245			66,737
Installation fee		154,542		150,140			174,238
Advertising expenses		171,400		195,519			153,750
Allowance for bad debts		82,329		115,358			150,549
Card service cost		3,114,047		3,127,673			3,189,376
Loss on disposal of property and equipment		71,417		81,415			72,710
Loss on disposal of intangible assets		3,885		7,015			5,328
Loss on disposal of right-of-use assets		11,457		2,348			2,115
Loss on disposal of investments in subsidiaries		13,727		—			—
Impairment loss on property and equipment		2,115		16,094			7,871
Impairment loss on intangible assets		3,747		30,965			236,206
Donations		10,981		15,642			24,664
Other allowance for bad debts		28,066		17,551			34,112
Others		952,614		1,369,686			1,902,214
Total	￦	23,506,262	￦	24,266,049		￦	25,166,796

1 Service cost is mainly recorded by purchase of service for system implementation and contents service.

(2) Details of employee benefit cost for the years ended December 31, 2021, 2022 and 2023, are as follows:

(in millions of Korean won)	2021		2022		2023
Salaries & Wages	￦	3,837,359	￦	4,161,874	￦	4,231,781
Post-employment benefits(Defined benefit plan)		236,831		225,404		183,026
Post-employment benefits(Defined contribution plan)		71,068		72,576		85,174
Share-based payment		47,415		16,799		15,450
Others		23,137		19,232		41,401
Total	￦	4,215,810	￦	4,495,885	￦	4,556,832

F-83

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

28. Financial Income and Costs

(1) Details of financial income for the years ended December 31, 2021, 2022 and 2023, are as follows:

(in millions of Korean won)	2021		2022		2023
Interest income	￦	273,460	￦	271,925	￦	279,607
Gain on foreign currency transactions		19,976		67,976		27,407
Gain on foreign currency translation		32,768		43,092		11,944
Gain on derivative transactions		2,215		50,668		12,304
Gain on valuation of derivatives		255,149		182,998		49,881
Gain on disposal of trade receivables		—		—		3,441
Gain on valuation of financial instruments		90,653		31,032		32,477
Others		52,062		42,737		69,216
Total	￦	726,283	￦	690,428	￦	486,277

(2) Details of financial costs for the years ended December 31, 2021, 2022 and 2023, are as follows:

(in millions of Korean won)	2021		2022		2023
Interest expenses	￦	263,389	￦	293,854	￦	356,345
Loss on foreign currency transactions		13,105		81,171		34,281
Loss on foreign currency translation		213,689		200,109		95,730
Loss on derivative transactions		6,287		24,331		417
Loss on valuation of derivatives		15,947		21,601		6,598
Loss on disposal of trade receivables		22,712		62,697		17,980
Loss on valuation of financial instruments		25,994		65,660		55,049
Others		2,207		485		2,282
Total	￦	563,330	￦	749,908	￦	568,682

29. Deferred Income Tax and income Tax Expense

(1) The analysis of deferred tax assets and deferred tax liabilities as at December 31, 2022 and 2023, is as follows:

(in millions of Korean won)	December 31, 2022			December 31, 2023
Deferred tax assets
Deferred tax assets to be recovered within 12 months	￦	398,710		￦	404,234
Deferred tax assets to be recovered after more than 12 months		1,907,690			1,824,099
Deferred tax assets before offsetting		2,306,400			2,228,333
Deferred tax liabilities
Deferred tax liabilities to be recovered within 12 months		(586,522	)		(491,817	)
Deferred tax liabilities to be recovered after more than 12 months		(2,108,438	)		(2,116,346	)
Deferred tax liabilities before offsetting		(2,694,960	)		(2,608,163	)
Deferred tax assets after offsetting	￦	579,090		￦	614,500
Deferred tax liabilities after offsetting	￦	967,650		￦	994,330

F-84

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

(2) The movement in deferred income tax assets and liabilities during the year, without taking into consideration the offsetting of balances within the same tax jurisdiction, is as follows:

(in millions of Korean won)	2022
	Beginning			Statement of profit or loss			Other comprehensive income			Ending
Deferred tax liabilities
Investments in subsidiaries, associates and joint ventures		(240,633	)		(18,299	)		3,748			(255,184	)
Depreciation and impairment loss		(88,588	)		(62,845	)		—			(151,433	)
Plan assets		(538,928	)		(5,294	)		1,322			(542,900	)
Advanced depreciation provision		(339,005	)		(182,934	)		—			(521,939	)
Contract assets		(493,917	)		69,615			—			(424,302	)
Financial assets at fair value through profit or loss		(336	)		(73	)		(11	)		(420	)
Financial assets at fair value through other comprehensive income		(47,521	)		(71,396	)		58,288			(60,629	)
Others		(623,744	)		(111,135	)		(3,274	)		(738,153	)
Total	￦	(2,372,672	)	￦	(382,361	)	￦	60,073		￦	(2,694,960	)
Deferred tax assets
Depreciation and impairment loss		225,821			(36,989	)		—			188,832
Contract liabilities		148,454			(27,165	)		—			121,289
Defined benefit liabilities		571,336			(22,423	)		(67,055	)		481,858
Provisions		172,871			(20,894	)		(22	)		151,955
Others		899,543			351,317			8,635			1,259,495
Total	￦	2,018,025		￦	243,846		￦	(58,442	)	￦	2,203,429
Temporary difference, net		(354,647	)		(138,515	)		1,631			(491,531	)
Tax credit carryforwards		134,417			(31,446	)		—			102,971
Total net balance	￦	(220,230	)	￦	(169,961	)	￦	1,631		￦	(388,560	)

F-85

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

(in millions of Korean won)	2023
	Beginning			Statement of profit or loss			Other comprehensive income			Ending
Deferred tax liabilities
Investments in subsidiaries, associates and joint ventures		(255,184	)		(7,821	)		(7,225	)		(270,230	)
Depreciation and impairment loss		(151,433	)		39,309			—			(112,124	)
Plan assets		(542,900	)		8,367			826			(533,707	)
Advanced depreciation provision		(521,939	)		3,859			—			(518,080	)
Contract assets		(424,302	)		2,478			—			(421,824	)
Financial assets at fair value through profit or loss		(420	)		461			43			84
Financial assets at fair value through other comprehensive income		(60,629	)		(53	)		(41,945	)		(102,627	)
Others		(738,153	)		90,876			(2,378	)		(649,655	)
Total	￦	(2,694,960	)	￦	137,476		￦	(50,679	)	￦	(2,608,163	)
Deferred tax assets
Depreciation and impairment loss		188,832			(71,689	)		(397	)		116,746
Contract liabilities		121,289			(9,311	)		—			111,978
Defined benefit liabilities		481,858			(6,705	)		40,838			515,991
Provisions		151,955			(5,784	)		—			146,171
Others		1,259,495			(53,459	)		2,141			1,208,177
Total	￦	2,203,429		￦	(146,948	)	￦	42,582		￦	2,099,063
Temporary difference, net		(491,531	)		(9,472	)		(8,097	)		(509,100	)
Tax credit carryforwards		102,971			26,299			—			129,270
Total net balance	￦	(388,560	)	￦	16,827		￦	(8,097	)	￦	(379,830	)

(3) The tax impacts recognized directly to equity as of December 31, 2021, 2022, and 2023, are as follows:

	December 31, 2021									December 31, 2022									December 31, 2023
(in millions of Korean won)	Before recognition			Tax effect			After recognition			Before recognition			Tax effect			After recognition			Before recognition			Tax effect			After recognition
Gain (loss) on valuation of financial assets at fair value through other comprehensive income	￦	163,892		￦	(34,112	)	￦	129,780		￦	(216,862	)	￦	58,288		￦	(158,574	)	￦	163,750		￦	(41,945	)	￦	121,805
Gain (loss) on valuation of hedge instruments		6,916			(1,644	)		5,272			(42,510	)		11,180			(31,330	)		(30,168	)		7,555			(22,613	)
Remeasurements of net defined benefit liabilities		74,518			(18,696	)		55,822			247,162			(65,733	)		181,429			(179,129	)		41,664			(137,465	)
Share of gain (loss) of associates and joint ventures, and others		(34,909	)		9,097			(25,812	)		(14,931	)		3,748			(11,183	)		28,715			(7,225	)		21,490
Exchange differences on translation for foreign operations		683			(178	)		505			23,316			(5,852	)		17,464			32,376			(8,146	)		24,230
Gain or loss on disposal of treasury stock		(15,657	)		4,080			(11,577	)		(59,308	)		14,886			(44,422	)		402			(101	)		301
Total	￦	195,443		￦	(41,453	)	￦	153,990		￦	(63,133	)	￦	16,517		￦	(46,616	)	￦	15,946		￦	(8,198)		￦	7,748

F-86

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

(4) Details of income tax expense for the years ended December 31, 2021, 2022 and 2023, are calculated as follows:

(in millions of Korean won)	2021		2022		2023
Current income tax expense	￦	289,471	￦	335,796	￦	347,265
Impact of change in deferred taxes		229,545		169,961		(16,827	)
Income tax expense	￦	519,016	￦	505,757	￦	330,438

(5) The tax on the Group’s profit before tax differs from the theoretical amount that would arise using the weighted average tax rate applicable to profits of the entities as follows:

(in millions of Korean won)	2021			2022			2023
Profit before income tax expense	￦	1,978,411		￦	1,891,392		￦	1,302,620
Statutory income tax expense	￦	533,701		￦	509,771		￦	333,530
Tax effect
Income not taxable for taxation purposes		(4,307	)		(47,550	)		(30,106	)
Non-deductible expenses		20,570			53,398			26,723
Tax credit		(31,517	)		(54,895	)		(78,459	)
Additional payment of income taxes		(221	)		11,744			(4,991	)
Adjustments in deferred tax from changes in tax rate		—			(41,545	)		564
Tax effect and adjustment on consolidation
Goodwill impairment		—			5,809			106,010
Eliminated dividend income form subsidiaries		7,264			—			—
Changes of out-side tax effect		4,738			29,922			4,436
Intangible Asset impairment and amortization		796			5,276			5,892
Reversal expenses of contract cost assets		(2,932	)		(4,800	)		9,281
Acquisition and disposition of businesses		(5,128	)		—			—
Others		(3,948	)		38,627			(42,442	)
Income tax expense	￦	519,016		￦	505,757		￦	330,438

(6) Details of deferred tax assets and liabilities that are not recognized as at December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	2022		2023
Deductible temporary differences
Investment in subsidiaries, associates, and joint ventures	￦	3,384,295	￦	3,520,173
Unused tax loss		103,326		203,200
Unused Tax credit		1,988		2,338
Others		387,084		437,238
Total	￦	3,876,693	￦	4,162,949
Taxable temporary differences
Investment in subsidiaries, associates, and joint ventures	￦	857,076	￦	903,394
Others		216,660		211,201
Total	￦	1,073,736	￦	1,114,595

F-87

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

(7) The expected period of expiry for unused tax losses not recognized in deferred tax assets as of December 31, 2022 and 2023, is as follows:

(in millions of Korean won)	2022		2023
2023	￦	72,512	￦	4,484
2024		5,011		2,836
2025		3,701		2,086
2026		2,112		4,541
2027		2,534		2,473
2028		396		6,533
2029		617		743
2030		2,198		713
2031		1,360		756
2032		7,450		—
Atter 2033		5,435		178,035
Total	￦	103,326	￦	203,200

30. Earnings per Share

(1) Basic Earnings per Share

Basic earnings per share is calculated by dividing the profit from operations attributable to equity holders of the Group by the weighted average number of ordinary shares outstanding during the period, excluding ordinary shares purchased by the Group and held as treasury stock.

Basic earnings per share from operations for the years ended December 31, 2021, 2022 and 2023, is calculated as follows:

	2021		2022		2023
Profit attributable to ordinary shares of owners of the Controlling Company (in millions of Korean won)	￦	1,354,537	￦	1,259,686	￦	993,325
Weighted average number of ordinary shares outstanding (in number of shares)		235,201,782		242,235,332		249,470,072
Basic earnings per share (in Korean won)	￦	5,759	￦	5,200	￦	3,982

Diluted earnings per share from operations is calculated by adjusting the weighted average number of ordinary shares outstanding to assume conversion of all dilutive potential ordinary shares. The Group has dilutive potential ordinary shares from convertible bond and other share-based compensation.

F-88

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

(2) Diluted Earnings per Share

Diluted earnings per share from operations is calculated by adjusting the weighted average number of ordinary shares outstanding assuming that all dilutive potential ordinary shares are converted into ordinary shares. The Group has dilutive potential ordinary shares from convertible bonds, convertible preferred stock and other share-based payments:

	2021		2022			2023
Profit attributable to ordinary shares of owners of the Controlling Company (in millions of Korean won)	￦	1,354,537	￦	1,259,686		￦	993,325
Adjustment to net income attributable to ordinary shares (in millions of Korean won)		—		(496	)		(827	)
Diluted profit attributable to ordinary shares (in millions of Korean won)		1,354,537		1,259,190			992,498
Number of dilutive potential ordinary shares outstanding (in number of shares)		483,760		91,931			119,263
Weighted average number of ordinary shares outstanding (in number of shares)		235,685,542		242,327,263			249,589,335
Diluted earnings per share (in Korean won)	￦	5,747	￦	5,196		￦	3,977

Diluted earnings per share is earnings per outstanding of ordinary shares and dilutive potential ordinary shares. Diluted earnings per share is calculated by dividing adjusted profit for the year by the sum of the number of ordinary shares and dilutive potential ordinary shares. Convertible bonds and convertible preferred stocks without dilutive effects are excluded from the calculation.

31. Dividend

The dividends paid by the Parent in 2021, 2022 and 2023 were ￦326,487 million (￦1,350 per share), ￦450,394 million (￦1,910 per share), ￦501,844 million (￦1,960 per share), respectively. A dividend in respect of the year ended December 31, 2023, of ￦1,960 per share, amounting to a total dividend of ￦482,970 million, is to be proposed at the shareholders’ meeting on March 28, 2024.

F-89

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

32. Cash Generated from Operations

(1) Cash flows from operating activities for the years ended December 31, 2021, 2022 and 2023, are as follows:

(in millions of Korean won)	2021			2022			2023
1. Profit for the year	￦	1,459,395		￦	1,385,635		￦	972,182
2. Adjustments to reconcile net income
Income tax expense		519,016			505,757			335,367
Interest income 1		(300,900	)		(340,794	)		(392,580	)
Interest expense 1		268,847			320,914			410,566
Dividends income 2		(21,525	)		(14,121	)		(59,758	)
Depreciation		2,643,894			2,687,191			2,773,152
Amortization of intangible assets		604,744			627,261			691,909
Depreciation of right-of-use assets		398,716			396,214			402,737
Provision for severance benefits (defined benefits)		253,491			240,506			196,027
Impairment losses on trade receivables		105,344			132,102			175,244
Share of net profit or loss of associates and joint ventures		(116,061	)		16,821			44,323
Loss(gain) on disposal of associates and joint ventures		1			(38,024	)		(6,982	)
Loss(gain) on the disposal of subsidiaries		13,483			(216,591	)		(28,825	)
Loss(gain) on disposal of right-of-use assets		8,319			(978	)		(1,465	)
Impairment losses on assets held for sale		11			—			—
Impairment loss on property and equipment and investment in properties		2,115			16,094			7,871
Loss(gain) on disposal of property and equipment and investment in properties 3		17,410			(66,317	)		511
Loss on disposal of intangible assets		2,159			6,393			3,601
Loss on impairment of intangible assets		3,747			30,674			236,106
Loss on foreign currency translation		180,921			157,017			83,899
Gain on valuation and settlement of derivatives, net		(235,130	)		(205,381	)		(37,249	)
Gain on disposal of financial assets at fair value through profit or loss		(29,974	)		(2,347	)		(2,225	)
Loss(Gain) on valuation of financial assets at fair value through profit or loss		(64,660	)		44,833			13,920
Loss(gain) on disposal of financial assets at amortized cost 4		(35	)		3			1
Others		84,625			(49,891	)		158,820
3. Change in operating assets and liabilities, net of effects from purchase of controlled entity and sale of engineering division
Decrease(increase) in trade receivables		327,031			(43,787	)		(124,023	)
Increase in other receivables		(328,610	)		(1,598,216	)		(1,085,527	)
Decrease(increase) in other current assets		(89,230	)		(101,947	)		250,569
Increase in other non-current assets		(143,087	)		(120,054	)		(86,030	)
Decrease(increase) in inventories		32,798			(179,255	)		(317,531	)
Increase(decrease) in trade payables		289,044			(368,355	)		121,515
Increase in other payables		207,583			1,103,113			829,220
Increase(decrease) in other current liabilities		107,993			(30,375	)		414,436
Decrease in other non-current liabilities		(14,915	)		(1,015	)		(14,272	)
Decrease in provisions		(4,668	)		(22,115	)		(5,083	)
Increase(decrease) in deferred revenue		3,696			(384	)		905
Decrease(increase) in plan assets		(114,631	)		(90,771	)		115,725
Payment of post-employment benefits		(241,350	)		(343,931	)		(329,861	)
4. Cash generated from operations (1+2+3)	￦	5,829,607		￦	3,835,879		￦	5,747,195

F-90

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

1 BC Card CO., Ltd. and other subsidiaries of the Group recognize interest income and expense as operating revenue and expense, respectively, including interest income of ￦112,973 million (2021: ￦27,440 million, 2022: ￦68,869 million) and interest expense of ￦55,677 million that are recognized as operating revenue and expense, respectively, for the year ended December 31, 2023 (2021: ￦5,458 million, 2022: ￦27,060 million).

2 BC Card Co., Ltd. Recognized dividend income as operating revenue, including dividend income of ￦1,759 million that is recognized as operating revenue for the year ended December 31, 2023 (2021: ￦1,340 million, 2022: ￦2,299 million).

3 KT Estate Inc. recognized gain and loss on disposal of investment properties as operating revenue and expense, respectively, including gain on disposal of investment properties of ￦49,752 million that is recognized as operating revenue for the year ended December 31, 2023.

4 KT Investment CO., Ltd. and other subsidiaries of the Group recognized gain and loss on valuation of financial assets at fair value through profit or loss as operating revenue and expense, respectively, including loss on valuation of financial assets at fair value through profit or loss of ￦11,112 million that is recognized as operating expense for the year ended December 31, 2023.

(2) Significant transactions not affecting cash flows for the years ended December 31, 2021, 2022 and 2023, are as follows:

(in millions of Korean won)	2021			2022			2023
Reclassification of the current portion of borrowings	￦	1,303,543		￦	1,004,818		￦	1,731,998
Reclassification of construction-in-progress to property and equipment		2,916,888			3,167,965			3,123,611
Reclassification of accounts payable from property and equipment		(149,512	)		(7,055	)		(293,448	)
Reclassification of accounts payable from intangible assets		524,040			(197,389	)		(276,491	)
Reclassification of payable from defined benefit liabilities		69,415			(32,417	)		26,246
Reclassification of payable from plan assets		(60,320	)		28,532			(24,821	)
Disposal of treasury stock related to acquisition of financial assets		—			747,161			—
Acquisition of financial assets related to disposal of a subsidiary		—			250,000			—

F-91

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

33. Changes in Liabilities Arising from Financing Activities

Details of changes in liabilities arising from financing activities, liabilities related to cashflow to be classified as future financing activities, for the years ended December 31, 2021, 2022 and 2023, are as follows:

(in millions of Korean won)	2021
	Beginning			Cash flows			Non-cash											Ending
							Newly acquired		Changes in FX rate		Fair Value changes		Acquisition and disposition of businesses		Others
Borrowing	￦	7,316,298		￦	900,394		￦	52,782	￦	196,890	￦	—	￦	15,994	￦	(44,655)		￦	8,437,703
Lease liabilities		1,143,640			(394,567	)		403,451		3		90		36,840		(30,088)			1,159,369
Derivative liabilities		130,573			(1,712	)		2,637		(4,311)		(4,892)		—		(47,119)			75,176
Derivative assets		(7,606	)		216			—		(189,700)		(17,251)		—		114,888			(99,453	)
Total	￦	8,582,905		￦	504,331		￦	458,870	￦	2,882	￦	(22,053)	￦	52,834	￦	(6,974	)	￦	9,572,795

(in millions of Korean won)	2022
	Beginning			Cash flows			Non-cash											Ending
							Newly acquired			Changes in FX rate		Fair Value changes		Acquisition and disposition of businesses		Others
Borrowing	￦	8,437,703		￦	1,391,321		￦	—		￦	146,108	￦	939	￦	—	￦	30,614	￦	10,006,685
Lease liabilities		1,159,369			(378,684	)		427,398			—		—		—		(36,045)		1,172,038
Derivative liabilities		75,176			(41,197	)		—			19,858		12,941		—		(33,223)		33,555
Derivative assets		(99,453	)		76,280			(754	)		(147,161)		30,341		—		(50,083)		(190,830	)
Total	￦	9,572,795		￦	1,047,720		￦	426,644		￦	18,805	￦	44,221	￦	—	￦	(88,737)	￦	11,021,448

(in millions of Korean won)	2023
	Beginning			Cash flows			Non-cash											Ending
							Newly acquired		Changes in FX rate		Fair value changes		Acquisition and disposition of businesses		Others
Borrowing	￦	10,006,685		￦	106,118		￦	—	￦	45,370	￦	1,719	￦	—	￦	58,273		￦	10,218,165
Lease liabilities		1,172,038			(407,051	)		460,617		—		24		—		(45,719)			1,179,909
Derivative liabilities		33,555			—			—		10,888		9,643		—		(29,539)			24,547
Derivative assets		(190,830	)		48,183			—		32,487		1,788		—		(50,839	)		(159,211	)
Total	￦	11,021,448		￦	(252,750)		￦	460,617	￦	88,745	￦	13,174	￦	—	￦	(67,824)		￦	11,263,410

34. Segment Information

(1) The management of the Group determines the operating and reporting segments based on the reported information when establishing the business strategy.

Details	Business service
ICT	Mobile/fixed line telecommunication service and convergence business, B2B business and others
Finance	Credit card business
Satellite TV Real estate	Satellite TV business Residential building development and supply
Others	Cable television service, IT, facility security and global business, and others

F-92

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

(2) Details of each segment for the years ended December 31, 2021, 2022 and 2023, are as follows:

	2021
(in millions of Korean won)	Operating revenues			Operating Income			Depreciation and Amortization1
ICT	￦	18,734,342		￦	1,170,920		￦	3,217,643
Finance		3,526,743			104,511			46,223
Satellite TV		665,081			61,398			60,980
Real estate		336,218			27,498			60,459
Others		6,474,858			390,903			327,202
Total		29,737,242			1,755,230			3,712,507
Elimination2		(4,531,583	)		(55,833	)		(104,869	)
Consolidated amount	￦	25,205,659		￦	1,699,397		￦	3,607,638

	2022
(in millions of Korean won)	Operating revenues			Operating Income			Depreciation and Amortization1
ICT	￦	18,697,269		￦	1,347,405		￦	3,105,807
Finance		3,615,307			119,805			47,638
Satellite TV		709,160			19,797			58,413
Real estate		474,954			113,134			65,457
Others		7,960,143			473,276			575,035
Total		31,456,833			2,073,417			3,852,350
Elimination2		(5,222,627	)		(105,260	)		(196,471	)
Consolidated amount	￦	26,234,206		￦	1,968,157		￦	3,655,879

	2023
(in millions of Korean won)	Operating revenues			Operating Income			Depreciation and Amortization1
ICT	￦	18,698,964		￦	1,193,333		￦	3,183,408
Finance		3,723,286			91,591			37,150
Satellite TV		714,574			(70,170	)		52,871
Real estate		499,997			73,496			70,653
Others		8,145,272			97,568			584,738
Total		31,782,093			1,385,818			3,928,820
Elimination2		(5,186,848	)		42,631			(118,689	)
Consolidated amount	￦	26,595,245		￦	1,428,449		￦	3,810,131

1 Sum of the amortization of tangible assets, intangible assets, investment properties, and right-of-use assets.

2 Elimination for operating revenues is the difference between operating revenue included in the CODM report, which is based on Korean IFRS and operating revenue based on IFRS. Elimination for depreciation and amortization and operating revenues also included consolidated adjustments due to intercompany transactions with the group.

F-93

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

(3) Operating revenues for the years ended December 31, 2021, 2022 and 2023 and non-current assets as at December 31, 2022 and 2023 by geographical regions, are as follows:

(In millions of Korean won)	Operating revenues						Non-current assets1
Location	2021		2022		2023		2022.12.31		2023.12.31
Domestic	￦	25,114,719	￦	26,074,349	￦	26,425,735	￦	20,845,214	￦	20,725,694
Overseas		90,940		159,857		169,510		270,490		183,344
Total	￦	25,205,659	￦	26,234,206	￦	26,595,245	￦	21,115,704	￦	20,909,038

1 Sum of property and equipment, intangible assets, investment properties and right-of-use assets.

35. Related Party Transactions

(1) The list of related party of the Group as of December 31, 2023, is as follows:

Relationship	Name of Entity
Associates and joint ventures	There are 54 Associates and joint ventures, and entities listed on the table below has Related Party Transactions
Others1	Goody Studio Co., Ltd., Rebellion Inc., Digital Pharm Co., Ltd., Mastern No.127 Logispoint Daegu Co., Ltd., KORAMKO No. 143 General Private Real Estate Investment Company

1 The investment in preferred shares in these entities are accounted for under IFRS 9. Given the Company’s significant influence in the investees, those are included in the list of related parties.

(2) Outstanding balances of receivables and payables in relations to transactions with related parties as of December 31, 2022 and 2023, are as follows:

		December 31, 2022
		Receivables				Payables
(in millions of Korean won)		Trade receivables		Other receivables		Trade payables		Other payables		Lease liabilities
Associates and joint ventures	K Bank, Inc.	￦	682	￦	258,999	￦	—	￦	299	￦	—
	Little Big Pictures		1,454		7,645		—		9		—
	K-Realty 11th Real Estate Investment Trust Company		151		1,283		—		—		8,824
	Others		2,285		2		3,235		2,932		—
Total		￦	4,572	￦	267,929	￦	3,235	￦	3,240	￦	8,824

F-94

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

		December 31, 2023
		Receivables						Payables
(in millions of Korean won)		Trade receivables		Other receivables		Lease receivables		Trade payables		Other payables		Lease liabilities
Associates and joint ventures	K Bank, Inc.	￦	862	￦	326,006	￦	769	￦	—	￦	299	￦	—
	Little Big Pictures		232		3,473		—		9		6		—
	K-Realty 11th Real Estate Investment Trust Company		110		1,283		—		—		—		6,732
	K-Realty No.3 Real Estate General Private Placement Investment Company		4,576		—		—		—		—		—
	Others		2,044		162		—		2,900		3,029		—
Total		￦	7,824	￦	330,924	￦	769	￦	2,909	￦	3,334	￦	6,732

(3) Significant transactions with related parties for the years ended December 31, 2021, 2022 and 2023, are as follows:

		2021
(in millions of Korean won)		Sales		Purchases1
Associates and joint ventures	K- Realty CR-REITs No.1	￦	238,847	￦	1,308
	IGIS Professional Investors Private Investment Real Estate Investment LLC No. 395		5,000		—
	K Bank, Inc.		24,247		15,164
	Others2,3		28,092		21,302
Total			296,186		37,774

		2021
(in millions of Korean won)		Interest income		Interest expense		Dividend income
Associates and joint ventures	K- Realty CR-REITs No.1		￦—		￦205		￦40,142
	Korea Information & Technology Investment Fund (KIF Investment Fund)		223		—		—
	K Bank, Inc.		—		—		—
	Others2,3		—		—		8,637
Total		￦	223	￦	205	￦	48,779

1 Amounts include acquisition of property and equipment, and others.

F-95

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

2 Transaction amount before OSKENT Co., Ltd., Mission Culture Industry Limited, Sweet and Sour Culture Industry Limited, Alma Mater Culture Industry Limited, and KT Philippines are excluded from associates and joint ventures.

3 Includes transactions of Oscar Ent. before it was excluded as associates and joint ventures of the Group.

		2022
(in millions of Korean won)		Operating Revenue		Purchases1
Associates and joint ventures	K- Realty CR-REITs No.12	￦	—	￦	—
	K Bank, Inc.		29,536		11,007
	Hyundai Robotics Co., Ltd.1		94		3,799
	K-Realty 11th Real Estate Investment Trust Company		330		1,674
	Others3		11,964		37,742
Others	Digital Pharm Co., Ltd.		1		—
Total			41,925		54,222

		2022
(in millions of Korean won)		Acquisition of right-of-use assets		Interest income		Interest expense		Dividend income
Associates and joint ventures	K- Realty CR-REITs No.1 2	￦	—	￦	—	￦	—	￦	45,549
	K Bank, Inc.		—		3,052		—		—
	Hyundai Robotics Co., Ltd. 1		—		—		—		—
	K-Realty 11th Real Estate Investment Trust Company		1,966		—		260		162
	Others 3		—		—		—		9,158
Total		￦	1,966	￦	3,052	￦	260	￦	54,869

1 Amounts include acquisition of property and equipment, and others.

2 Includes transactions of the entity before it was excluded as an associate and joint venture of the Group.

3 Includes transactions of StorySoop Inc. before it was excluded as associates and joint ventures of the Group.

F-96

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

		2023
(in millions of Korean won)		Operating Revenue		Purchases1
Associates and joint ventures	K Bank, Inc.	￦	22,701	￦	13,429
	HD Hyundai Robotics Co., Ltd. (formerly Hyundai Robotics Co., Ltd.)		78		182
	K-Realty 11th Real Estate Investment Trust Company		346		2,559
	K-Realty No.3 Real Estate General Private Placement Investment Company		6,216		—
	Others 2 3		21,308		42,169
Others	Digital Pharm Co., Ltd.		1		—
Total			50,650		58,339

		2023
(in millions of Korean won)		Acquisition of right-of-use assets		Interest income		Interest expense		Dividend income
Associates and joint ventures	K Bank, Inc.	￦	—	￦	8,264	￦	—	￦	—
	HD Hyundai Robotics Co., Ltd.(formerly Hyundai Robotics Co., Ltd.)		—		—		—		—
	K-Realty 11th Real Estate Investment Trust Company		7		—		261		507
	Others 2 3		—		—		—		1,279
Total		￦	7	￦	8,264	￦	261	￦	1,786

1 Amounts include acquisition of property and equipment, and others.

2 Includes transactions of KD Living Co., Ltd. before it was included as a subsidiary.

3 Includes transactions of FUNDA Co., Ltd, Maruee Limited Company Specializing in the Cultural Industry, Mastern No.127 Logispoint Daegu Co., Ltd. before it was excluded as associates and joint ventures of the Group.

(4) Key management compensation for the years ended December 31, 2021, 2022 and 2023, consists of:

(in millions of Korean won)	2021		2022		2023
Salaries and other short-term benefits	￦	2,189	￦	1,855	￦	1,494
Post-employment benefits		412		294		153
Share-based compensation		669		976		569
Total	￦	3,270	￦	3,125	￦	2,216

F-97

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

(5) Fund transactions with related parties for the years ended December 31, 2021, 2022 and 2023, are as follows:

	2021
(in millions of Korean won)	Borrowing transactions1				Equity contributions in cash
Associates and joint ventures	Borrowings		Repayments
K- REALTY CR REIT1	￦	—	￦	15,964	￦	—
K Bank, Inc.		—		—		424,957
Pacific Professional Investors Private Investment Real Estate Investment LLC No. 55		—		—		11,000
KT Young Entrepreneurs DNA Investment Fund		—		—		8,400
Mastern KT Multi-Family Real Estate Private Equity Investment Fund1		—		—		6,055
KT-IBKC Future Investment Fund1		—		—		(5,700	)
Others 2		—		—		18,176
Total	￦	—	￦	15,964	￦	462,888

1 Borrowing transactions include lease transactions.

2 Others include transactions before exclusion as associates and joint ventures of the Group.

	2022
(in millions of Korean won)	Borrowing transactions1				Equity contributions in cash
Associates and joint ventures	Borrowings		Repayments
Megazone Cloud Corporation	￦	30,000	￦	—	￦	130,001
IBK-KT Emerging Digital Industry Investment Fund		—		—		10,800
Mastern KT Multi-Family Real Estate Private Equity Investment Fund1		—		—		18,859
IGIS No. 468-1 General Private Real Estate Investment Company		—		—		25,000
K-Realty 11th Real Estate Investment Trust Company		1,916		771		—
Others		—		—		93,478
Total	￦	31,916	￦	771	￦	278,138

1 Lease transactions are included in borrowing transactions.

F-98

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

	2023
(in millions of Korean won)	Borrowing transactions1				Equity contributions in cash
Associates and joint ventures	Borrowings		Repayments
K-Realty 11th Real Estate Investment Trust Company	￦	—	￦	1,037	￦	—
STIC Place General Private Placement Real Estate Investment Trust No.2		—		—		20,000
Telco Credit Bureau Co.,Ltd.		—		—		6,500
Pacific geumto no.75 private hybrid asset fund		—		—		19,000
Kiamco Data Center Blind Fund		—		—		15,000
STIC Mixed Asset Investment Trust No.1		—		—		10,930
Others2		—		—		31,107
Others
Rebellions Co.,Ltd.		—		—		19,998
Total	￦	—	￦	1,037	￦	122,535

1 Lease transactions are included in borrowing transactions.

2 Includes transaction details before Daemuga Limited Company Specializing in the Cultural Industry, Maruee Limited Company Specializing in the Cultural Industry were excluded from the associates company.

(6) Provision of collateral and investment agreement and others

Provision of collateral and investment agreement The Group has an obligation to invest in Kiamco Data Center Blind Fund, a related party, and others according to the agreement. As of December 31, 2023 the Company is planning make an additional investment of ￦107,774 million

(7) As of December 31, 2023, the limit of the credit card contract provided by the Group to K Bank,

Inc. is ￦1,050 million (December 31, 2022: ￦1,000 million).

36. Financial Risk Management

(1) Financial Risk Factors

The Group’s activities expose it to a variety of financial risks: market risk, credit risk and liquidity risk. The Group’s overall risk management program focuses on the unpredictability of financial markets and seeks to minimize potential adverse effects on the Group’s financial performance. The Group uses derivative financial instruments to hedge certain risk exposures such as cash flow risk.

The Group’s financial policy is set up in the long-term perspective and annually reported to the Board of Directors. The financial risk management is carried out by the Value Management Office, which identifies, evaluates and hedges financial risks. The treasury department in the Value Management Office considers various finance market conditions to estimate the effect from the market changes.

F-99

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

1) Market risk

The Group’s market risk management focuses on controlling the extent of exposure to the risk in order to minimize revenue volatility. Market risk is a risk that decreases value or profit of the Group’s portfolio due to changes in market interest rate, foreign exchange rate and other factors.

(i) Sensitivity analysis

Sensitivity analysis is performed for each type of market risk to which the Group is exposed. Reasonably possible changes in the relevant risk variable such as prevailing market interest rates, currency rates, equity prices or commodity prices are estimated and if the rate of change in the underlying risk variable is stable, the Group does not alter the chosen reasonably possible change in the risk variable. The reasonably possible change does not include remote or ‘worst case’ scenarios or ‘stress tests’.

(ii) Foreign exchange risk

The Group is exposed to foreign exchange risk arising from operating, investing and financing activities. Foreign exchange risk is managed within the range of the possible effect on the Group’s cash flows. Foreign exchange risk (i.e. foreign currency translation of overseas operating assets and liabilities) unaffecting the Group’s cash flows is not hedged but can be hedged at a particular situation.

As of December 31, 2021, 2022 and 2023, if the foreign exchange rate had strengthened/weakened by 10% with all other variables held constant, the effects on profit before income tax and shareholders’ equity would have been as follows:

(in millions of Korean won)	Fluctuation of foreign exchange rate			Impact on profit before income tax1			Impact on equity
2021.12.31		10	%	￦	(3,433	)	￦	8,692
		-10	%		3,433			(8,692	)
2022.12.31		10	%	￦	(5,841	)	￦	(15,836	)
		-10	%		5,841			15,836
2023.12.31		10	%	￦	(10,313	)	￦	(18,460	)
		-10	%		10,313			18,460

1 Computed with considering derivatives hedging effect applied by the Group to hedge foreign exchange risk of liabilities in foreign currencies.

The above analysis is a simple sensitivity analysis which assumes that all the variables other than foreign exchange rates are held constant. Therefore, the analysis does not reflect any correlation between foreign exchange rates and other variables, nor the management’s decision to decrease the risk.

F-100

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

Details of financial assets and liabilities in foreign currencies as at December 31, 2021, 2022 and 2023, are as follows:

(In thousands of foreign currencies)	2021				2022				2023
	Financial assets		Financial liabilities		Financial assets		Financial liabilities		Financial assets		Financial liabilities
USD		245,759		2,302,642		106,426		2,336,607		139,807		2,271,673
SDR1		255		722		255		722		254		722
JPY		29,227		30,000,763		32,801		400,002		17,496		400,002
GBP		—		1,005		30		83		—		—
EUR		3,943		10,801		185		7,832		304		7,810
RWF2		586		—		15,521		13,025		402		—
THB3		2,160		—		265		—		244		—
TZS4		1,644		—		1,464		—		21,958		—
BWP5		93		—		183		—		680		—
HKD6		—		105		37		—		—		—
VND7		257,895		—		280,226		—		380,629		—
SGD8		13		284,000		448		284,000		1,375		—
TWD9		—		226		—		—		1,685		—
CHF10		—		161		—		—		—		25
MYR11		—		—		1		—		—		—
BGN12		—		—		62		—		—		—
PKR13		—		—		—		—		114,025		—

1 Special Drawing Rights.

2 Rwanda Franc.

3 Thailand Bhat.

4 Tanzanian Shilling.

5 Botswana Pula.

6 Hong Kong Dollar.

7 Vietnam Dong.

8 Singapore Dollar.

9 Taiwan Dollar.

10 Swiss Franc.

11 Ringgit Malaysia.

12 Bulgarian Lev.

13 Pakistani rupee

F-101

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

(iii) Price risk

As of December 31, 2021, 2022 and 2023, the Group is exposed to equity securities price risk because the securities held by the Group are traded in active markets. If the market prices had increased/decreased by 10% with all other variables held constant, the effects on profit before income tax and equity would have been as follows:

(in millions of Korean won)	Fluctuation of price	Impact on profit before income tax			Impact on equity
2021.12.31	10%	￦	2,000		￦	4,588
	-10%		(2,000	)		(4,588	)
2022.12.31	10%	￦	2,660		￦	113,948
	-10%		(2,660	)		(113,948	)
2023.12.31	10%	￦	1,473		￦	121,423
	-10%		(1,473	)		(121,423	)

The analysis above is based on the assumption that the equity index had increased/decreased by 10% with all other variables held constant and all the Group’s marketable equity instruments had moved according to the historical correlation with the index. Gain or loss on equity securities classified as financial assets at fair value through profit or loss and financial assets at fair value through other comprehensive income can increase or decrease equity.

(iv) Cash flow and fair value interest rate risk

The Group’s interest rate risk arises from liabilities in foreign currency such as foreign currency debentures. Debentures in foreign currency issued at variable rates expose the Group to cash flow interest rate risk which is partially offset by swap transactions. Debentures and borrowings issued at fixed rates expose the Group to fair value interest rate risk. The Group sets the policy and operates to minimize the uncertainty of the changes in interest rates and financial costs.

As of December 31, 2021, 2022 and 2023, if the market interest rate had increased/decreased by 100 bp with other variables held constant, the effects on profit before income tax and shareholders’ equity would be as follows:

(in millions of Korean won)	Fluctuation of interest rate		Impact on profit before income tax			Impact on equity
2021.12.31		+ 100 bp	￦	753		￦	5,549
		- 100 bp		(731	)		(5,675	)
2022.12.31		+ 100 bp	￦	635		￦	(2,045	)
		- 100 bp		(669	)		2,100
2023.12.31		+ 100 bp	￦	(2,693	)	￦	(4,718	)
		- 100 bp		2,696			5,037

The above analysis is a simple sensitivity analysis which assumes that all the variables other than market interest rates are held constant. Therefore, the analysis does not reflect any correlation between market interest rates and other variables, nor the management’s decision to decrease the risk.

F-102

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

2) Credit risk

Credit risk is the risk of financial loss to the Group if a customer or counterparty to a financial instrument fails to meet its contractual obligations and arises principally from the Group’s trade receivables from customers, debt securities and others.

- Risk management

Credit risk is managed on the Group basis with the purpose of minimizing financial loss. Credit risk arises from the normal transactions and investing activities, where clients or other party fails to discharge an obligation on contract conditions. To manage credit risk, the Group considers the counterparty’s credit based on the counterparty’s financial conditions, default history and other important factors.

Credit risk arises from cash and cash equivalents, derivative financial instruments and deposits with banks and financial institutions, as well as outstanding receivables. To minimize such risk, only the financial institutions with strong credit ratings are accepted.

The Group’s investments in debt instruments are considered to be low risk investments. The credit ratings of the investments are monitored for credit deterioration.

- Security

For some trade receivables, the Group may obtain security in the form of guarantees or letters of credit, etc. which can be called upon if the counterparty is in default under the terms of the agreement.

- Impairment of financial assets

The Group has four types of financial assets that are subject to the expected credit loss model:

• trade receivables for sales of goods and provision of services,

• contract assets relating to provision of services,

• debt investments carried at fair value through other comprehensive income, and

• other financial assets carried at amortized cost.

While cash equivalents are also subject to the impairment requirement, the identified expected credit loss was immaterial.

F-103

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

The maximum exposure to credit risk of the Group’s financial instruments without considering value of collaterals as of December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	December 31, 2022		December 31, 2023
Cash and cash equivalents (except for cash on hand)	￦	2,437,629	￦	2,869,285
Trade and other receivables
Financial assets at amortized costs		7,459,994		8,458,259
Financial assets at fair value through other comprehensive income		129,124		116,198
Contract assets		802,253		832,520
Other financial assets
Derivatives financial assets for hedging		190,830		159,211
Financial assets at fair value through profit or loss		942,274		880,549
Financial assets at fair value through other comprehensive income		5,432		5,913
Financial assets at amortized costs		1,060,058		1,385,921
Total	￦	13,027,594	￦	14,707,856

The Group is exposed to credit risk for financial guarantee contracts. As of December 31, 2023, the Group’s maximum exposure amount is ￦116,719 million (2022: ￦26,206 million).

(i) Trade receivables and contract assets

The Group applies the simplified approach to measuring expected credit losses which uses a lifetime expected loss allowance for all trade receivables and contract assets.

The Group measures the expected credit loss by considering the future unrecoverable rate of the remaining balance of trade receivables and other receivables at the end of the reporting period. Each trade receivables and other receivables are classified considering the credit risk characteristics and overdue periods in order to measure expected credit loss. The expected credit loss rate calculation is based on historical payment and credit loss information in relation to revenue for 36 months period up to December 31, 2023. Meanwhile, the credit sales assets of BC Card Co., Ltd., a subsidiary, were judged to have low credit risk, so the expected 12-month credit loss was applied.

The expected credit losses reflect forward-looking information. Provision for impairment as of December 31, 2022 and 2023, are as follows:

	December 31, 2022
(in millions of Korean won)	Less than 6 months			7-12 months			More than 1 years			Total
Expected credit loss rate		5.57	%		25.84	%		67.16	%		—
Total carrying amounts	￦	3,443,163		￦	49,491		￦	207,396		￦	3,700,050
Provision for impairment	￦	(191,668	)	￦	(12,789	)	￦	(139,281	)	￦	(343,738	)

	December 31, 2023
(in millions of Korean won)	Less than 6 months			7-12 months			More than 1 years			Total
Expected credit loss rate		5.43	%		21.72	%		54.55	%		—
Total carrying amounts	￦	3,466,588		￦	68,772		￦	235,129		￦	3,770,489
Provision for impairment	￦	(188,086	)	￦	(14,940	)	￦	(128,264	)	￦	(331,290	)

F-104

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

Details of changes in provisions for impairment of trade receivables the years ended December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	2022			2023
Beginning balance	￦	349,725		￦	343,738
Provision		64,522			69,972
Written-off		(68,298	)		(80,126	)
Others		(2,211	)		(2,294	)
Ending balance	￦	343,738		￦	331,290

As of December 31, 2023, the maximum exposure of the trade receivables carrying amount to credit risk is ￦3,439,199 million (2022: ￦3,356,312 million).

Impairment of trade receivable for the years ended December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	2022		2023
Impairment loss Bad debt expenses	￦	64,522	￦	69,972

(ii) Cash equivalents (except for cash on hand)

The Group is also exposed to credit risk in relation cash equivalents. The maximum exposure at the end of the reporting period is the carrying amount of these investments.

(iii) Other financial assets at amortized costs

Other financial assets at amortized cost include time deposits, other long-term financial instruments and others. All of the financial assets at amortized costs are considered to have low credit risk, and the loss allowance recognized during the period was, therefore, limited to 12 months expected losses. Management considers ‘low credit risk’ for other instruments when they have a low risk of default and the issuer has a strong capacity to meet its contractual cash flow obligations in the near term.

Details of changes in provisions for impairment of other financial assets at amortized costs for the years ended December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	2022			2023
Beginning balance	￦	201,387		￦	218,543
Provision		65,941			114,501
Written-off		(51,383	)		(150,014	)
Reversal		(850	)		(14,941	)
Others		3,448			15,547
Ending balance	￦	218,543		￦	183,636

F-105

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

(iv) Financial assets at fair value through other comprehensive income

All of the debt investments at fair value through other comprehensive income are considered to have low credit risk, and the loss allowance recognized during the period was, therefore, limited to 12 months expected losses. Managements consider ‘low credit risk’ for other instruments when they have a low risk of default and the issuer has a strong capacity to meet its contractual cash flow obligations in the near term. The maximum exposure at the end of the reporting period is the carrying amount of these investments.

(v) Financial assets at fair value through profit or loss

The Group is also exposed to credit risk in relation to financial assets that are measured at fair value through profit or loss. The maximum exposure at the end of the reporting period is the carrying amount of these investments.

3) Liquidity risk

The Group manages its liquidity risk by liquidity strategy and plans. The Group considers the maturity of financial assets and financial liabilities and the estimated cash flows from operations.

The table below analyzes the Group’s liabilities (including interest expenses) into relevant maturity groups based on the remaining period at the date of the end of each reporting period to the contractual maturity date. These amounts are contractual undiscounted cash flows and can differ from the amount in the consolidated financial statements.

	December 31, 2022
(in millions of Korean won)	Less than 1 year		1-5 years		More than 5 years		Total
Trade and other payables	￦	7,386,703	￦	1,009,559	￦	86,848	￦	8,483,110
Borrowings (including debentures)		2,028,207		6,972,077		2,016,472		11,016,756
Lease liabilities		313,162		615,766		407,833		1,336,761
Other non-derivative financial liabilities		33,279		209,155		93,744		336,178
Financial guarantee contracts1		21,618		—		4,588		26,206
Total	￦	9,782,969	￦	8,806,557	￦	2,609,485	￦	21,199,011

1 It is total amount guaranteed by the Group according to guarantee contracts. Cash flow from financial guarantee contracts is classified as the maturity group in the earliest period when the financial guarantee contracts can be executed.

F-106

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

	December 31, 2023
(in millions of Korean won)	Less than 1 year		1-5 years		More than 5 years		Total
Trade and other payables	￦	8,184,036	￦	730,340	￦	8,040	￦	8,922,416
Borrowings (including debentures)		2,922,557		6,027,323		1,743,842		10,693,722
Lease liabilities		313,431		617,561		409,174		1,340,166
Other non-derivative financial liabilities		372,743		747,221		10,073		1,130,037
Financial guarantee contracts1		13,719		103,000		—		116,719
Total	￦	11,806,486	￦	8,225,445	￦	2,171,129	￦	22,203,060

1 It is total amount guaranteed by the Group according to guarantee contracts. Cash flow from financial guarantee contracts is classified as the maturity group in the earliest period when the financial guarantee contracts can be executed.

At the end of the reporting period, the cash outflows and inflows by maturity of the Group’s derivatives held for trading and gross-settled derivatives are as follows:

	December 31, 2021
(in millions of Korean won)	Less than 1 year		1-5 years		More than 5 years		Total
Derivatives held for trading1
Outflows	￦	—	￦	158,284	￦	—	￦	158,284
Derivatives settled gross2
Outflows	￦	843,489	￦	1,857,942	￦	377,302	￦	3,078,733
Inflows		856,508		1,917,236		394,134		3,167,878

	December 31, 2022
(in millions of Korean won)	Less than 1 year		1-5 years		More than 5 years		Total
Derivatives held for trading1
Outflows	￦	—	￦	101,994	￦	930	￦	102,924
Derivatives settled gross2
Outflows	￦	472,005	￦	2,493,858	￦	28,786	￦	2,994,649
Inflows		550,478		2,670,002		37,873		3,258,353

	December 31, 2023
(in millions of Korean won)	Less than 1 year		1-5 years		More than 5 years		Total
Derivatives held for trading1
Outflows	￦	—	￦	133,293	￦	—	￦	133,293
Inflows		—		—		1,015		1,015
Derivatives settled gross2
Outflows	￦	741,140	￦	1,227,166	￦	8,126	￦	1,976,432
Inflows		614,066		2,198,958		36,344		2,849,368

1 During the year ended December 31, 2023, derivative liabilities held-for-trading are classified under the ‘more than one year to less than five years’ category as they are relevant to the fair value of derivatives liabilities related to shareholder-to-share contracts (Note 19).

F-107

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

As these derivatives held-for-trading are managed based on net fair value, their contractual maturities are not necessarily taking into consideration to understand the timing of cash flows.

2 Cash outflow and inflow of gross-settled derivatives are undiscounted contractual cash flow and may differ from the amount in the consolidated statement of financial position.

Meanwhile, as of December 31, 2023, the Group is obligated to invest ￦107,774 million in Kiamco Data Center Blind Fund, a related party, and others, and ￦4,132 million and USD 30,350 thousand to be paid in the future Capital Call method to Future Innovation Private Equity Fund No.3 (Notes 19 and 35).

(2) Management of Capital Risk

The Group’s objectives when managing capital are to safeguard the Group’s ability to continue as a going concern in order to provide returns for shareholders and benefits for other shareholders and to maintain an optimal capital structure to reduce the cost of capital.

The Group’s capital structure consists of liabilities including borrowings, cash and cash equivalents, and shareholders’ equity. The treasury department monitors the Group’s capital structure and considers cost of capital and risks related each capital component.

The debt-to-equity ratios as of December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	December 31, 2022			December 31, 2023
Total liabilities	￦	22,577,114		￦	24,249,073
Total equity		18,412,696			18,542,575
Debt-to-equity ratio		123	%		131	%

The Group manages capital on the basis of the gearing ratio. This ratio is calculated as net debt divided by total capital. Net debt is calculated as total borrowings less cash and cash equivalents. Total capital is calculated as ‘equity’ in the statement of financial position plus net debt.

The gearing ratios as of December 31, 2022 and 2023, are as follows:

(in millions of Korean won, %)	December 31, 2022			December 31, 2023
Total borrowings	￦	10,006,685		￦	10,218,165
Less: cash and cash equivalents		(2,449,062	)		(2,879,554	)
Net debt		7,557,623			7,338,611
Total equity		18,412,696			18,542,575
Total capital		25,970,319			25,881,186
Gearing ratio		29	%		28	%

F-108

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

(3) Offsetting Financial Assets and Financial Liabilities

1) Details of the Group’s recognized financial assets subject to enforceable master netting arrangements or similar agreements are as follows:

(in millions of Korean won)	December 31, 2022
	Gross assets		Gross liabilities offset			Net amounts presented in the statement of financial position		Amounts not offset					Net amount
								Financial instruments			Cash collateral
Trade receivables	￦	60,512	￦	—		￦	60,512	￦	(44,518	)	￦	—	￦	15,994
Other financial assets		764		(764	)		—		—			—		—
Total	￦	61,276	￦	(764	)	￦	65,012	￦	(44,518	)	￦	—	￦	15,994

(in millions of Korean won)	December 31, 2023
	Gross assets		Gross liabilities offset			Net amounts presented in the statement of financial position		Amounts not offset					Net amount
								Financial instruments			Cash collateral
Trade receivables	￦	78,415	￦	(1,407	)	￦	77,008	￦	(59,148	)	￦	—	￦	17,860
Other financial assets		759		(757	)		2		(2	)		—		—
Total	￦	79,174	￦	(2,164	)	￦	77,010	￦	(59,150	)	￦	—	￦	17,860

These include price subject to netting arrangements on facility interconnection and data sharing among telecommunication companies.

2) The Group’s recognized financial liabilities subject to enforceable master netting arrangements or similar agreements are as follows:

(in millions of Korean won)

December 31, 2022

Gross liabilities

Gross assets offset

Net amounts presented in the statement of financial position

Amounts not offset

Net amount

Financial instruments

Cash collateral

Trade payables

￦

47,271

￦

(764

)

￦

46,507

￦

(44,518

)

￦

—

￦

1,989

(in millions of Korean won)	December 31, 2023
	Gross liabilities		Gross assets offset			Net amounts presented in the statement of financial position		Amounts not offset					Net amount
								Financial instruments			Cash collateral
Trade payables	￦	59,602	￦	(757	)	￦	58,845	￦	(56,196	)	￦	—	￦	2,649
Other financial assets		4,362		(1,407	)		2,955		(2,955	)		—		—
Total	￦	63,964	￦	(2,164	)	￦	61,800	￦	(59,151	)	￦	—	￦	2,649

These include price subject to netting arrangements on facility interconnection and data sharing among telecommunication companies.

F-109

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

37. Fair Value

(1) Fair Value of Financial Instruments by Category

Carrying amount and fair value of financial instruments by category as of December 31, 2022 and 2023, are as follows:

	December 31, 2022				December 31, 2023
(in millions of Korean won)	Carrying amount		Fair value		Carrying amount		Fair value
Financial assets
Cash and cash equivalents	￦	2,449,062		1	￦	2,879,554		1
Trade and other receivables
Financial assets measured at amortized cost2		7,364,516		1		8,326,229		1
Financial assets at fair value through other comprehensive income		129,124		129,124		116,198		116,198
Other financial assets
Financial assets measured at amortized cost		1,060,058		1		1,385,921		1
Financial assets at fair value through profit or loss		1,064,856		1,064,856		939,661		939,661
Financial assets at fair value through other comprehensive income		1,508,192		1,508,192		1,680,168		1,680,168
Derivative financial assets for hedging		190,830		190,830		159,211		159,211
Total	￦	13,766,638			￦	15,486,942
Financial liabilities
Trade and other payables3	￦	8,397,264		1	￦	8,317,822		1
Borrowings		10,006,685		9,405,992		10,218,165		9,979,545
Other financial liabilities
Financial liabilities at amortized cost		246,606		1		915,185		1
Financial liabilities at fair value through profit or loss		141,280		141,280		136,106		136,106
Derivative financial liabilities for hedging purpose		33,555		33,555		24,547		24,547
Total	￦	18,825,390			￦	19,611,825

1 The Group did not conduct fair value estimation since the book amount is a reasonable approximation of the fair value.

2 Lease receivables are excluded from fair value disclosure in accordance with IFRS 7.

3 Amounts related to employee benefit plans are included in trade and other payables at the end of previous year.

F-110

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

(2) Fair Value Hierarchy

To provide an indication about the reliability of the inputs used in determining fair value, the Group classifies its financial instruments into the three levels prescribed under the accounting standards. Financial instruments that are measured at fair value are categorized by the fair value hierarchy, and the defined levels are as follows:

• Level 1: The fair value of financial instruments traded in active markets is based on quoted market prices at the end of the reporting period. The quoted market price used for financial assets held by the Group is the current bid price. These instruments are included in level 1.

• Level 2: The fair value of financial instruments that are not traded in active markets is determined using valuation techniques which maximize the use of observable market data and rely as little as possible on entity-specific estimates. If all significant inputs required to fair value an instrument are observable, the instrument is included in level 2.

• Level 3: If one or more of the significant inputs is not based on observable market data, the instrument is included in level 3.

Fair value hierarchy classifications of the financial assets and financial liabilities that are measured at fair value disclosed in fair value as of December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	December 31, 2022
	Level 1		Level 2		Level 3		Total
Assets
Trade and other receivables
Financial assets at fair value through other comprehensive income	￦	—	￦	129,124	￦	—	￦	129,124
Other financial assets
Financial assets at fair value through profit or loss		26,647		426,140		612,069		1,064,856
Financial assets at fair value through other comprehensive income		1,005,900		5,163		497,129		1,508,192
Derivative financial assets for hedging		—		189,717		1,113		190,830
Investment properties		—		—		5,370,047		5,370,047
Total	￦	1,032,547	￦	750,144	￦	6,480,358	￦	8,263,049
Liabilities
Borrowings	￦	—	￦	9,405,992	￦	—	￦	9,405,992
Other financial liabilities
Financial liabilities at fair value through profit or loss		—		—		141,280		141,280
Derivative financial liabilities for hedging purpose		—		33,555		—		33,555
Total	￦	—	￦	9,439,547	￦	141,280	￦	9,580,827

F-111

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

(in millions of Korean won)	December 31, 2023
	Level 1		Level 2		Level 3		Total
Assets
Trade and other receivables
Financial assets at fair value through other comprehensive income	￦	—	￦	116,198	￦	—	￦	116,198
Other financial assets
Financial assets at fair value through profit or loss		13,911		156,918		768,832		939,661
Financial assets at fair value through other comprehensive income		1,230,936		5,206		444,026		1,680,168
Derivative financial assets for hedging		—		159,211		—		159,211
Investment properties		—		—		5,276,169		5,276,169
Total	￦	1,244,847	￦	437,533	￦	6,489,027	￦	8,171,407
Liabilities
Borrowings	￦	—	￦	9,979,545	￦	—	￦	9,979,545
Other financial liabilities
Financial liabilities at fair value through profit or loss		—		1,545		134,561		136,106
Derivative financial liabilities for hedging purpose		—		24,547		—		24,547
Total	￦	—	￦	10,005,637	￦	134,561	￦	10,140,198

(3) Transfers Between Fair Value Hierarchy Levels of Recurring Fair Value Measurements

1) Details of transfers between Level 1 and Level 2 of the fair value hierarchy for recurring fair value measurements

There are no transfers between Level 1 and Level 2 of the fair value hierarchy for the recurring fair value measurements.

2) Details of changes in Level 3 of the fair value hierarchy for recurring fair value measurements.

F-112

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

Details of changes in Level 3 of the fair value hierarchy for the recurring fair value measurements as of December 31, 2022 and 2023, are as follows:

	2022
	Financial assets						Financial liabilities
(in millions of Korean won)	Financial assets at fair value through profit or loss			Financial assets at fair value through other comprehensive income			Derivative financial assets for hedging		Financial liabilities at fair value through profit or loss
Beginning balance	￦	577,085		￦	323,373		￦	31,565	￦	215,332
Acquisition		226,310			262,408			—		3,046
Reclassification		(8,962	)		8,122			—		(54,921	)
Acquisition and disposition of businesses		—			(40	)		—		—
Disposal		(179,740	)		(97,426	)		(31,565)		—
Amount recognized in profit or loss1		(2,624	)		18			—		(22,177	)
Amount recognized in other comprehensive income2		—			674			1,113		—
Ending balance	￦	612,069		￦	497,129		￦	1,113	￦	141,280

1 The recognition of gains and losses on derivatives financial liabilities (assets) for hedging purposes consists entirely of derivatives valuation losses.

2 The recognition of gains and losses on financial liabilities measured at fair value through profit or loss consists of derivative valuation losses.

	2023
	Financial assets						Financial liabilities
(in millions of Korean won)	Financial assets at fair value through profit or loss			Financial assets at fair value through other comprehensive income			Derivative financial assets for hedging		Financial liabilities at fair value through profit or loss
Beginning balance	￦	612,069		￦	497,129		￦	1,113	￦	141,280
Acquisition		216,838			10,267			—		—
Reclassification		26,471			(5,532	)		(1,113)		(7,363	)
Acquisition and disposition of businesses		252			—			—		—
Disposal		(44,323	)		(6	)		—		(5,205	)
Amount recognized in profit or loss 1,		(42,475	)		(61	)		—		5,849
Amount recognized in other comprehensive income		—			(57,771	)		—		—
Ending balance	￦	768,832		￦	444,026		￦	—	￦	134,561

1 The recognition of gains and losses on financial liabilities measured at fair value through profit or loss consists of derivative valuation gains and losses.

F-113

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

(4) Valuation Technique and the Inputs

Valuation techniques and inputs used in the recurring, non-recurring fair value measurements and disclosed fair values categorized within Level 2 and Level 3 of the fair value hierarchy as of December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	December 31, 2022
	Fair value		Level		Valuation techniques	Inputs
Assets
Trade and other receivables
Financial assets at fair value through other comprehensive income	￦	129,124		2	DCF Model	Guaranteed bond interest rate
Other financial assets
Financial assets at fair value through profit or loss		1,038,209		2,3	DCF Model, Adjusted Net Asset Model, Monte-Carlo Simulation	Market Interest rate, Underlying asset price
Financial assets at fair value through other comprehensive income		502,292		2,3	DCF Model, Market Approach Model	Discount rate
Derivative financial assets for hedging		190,830		2,3	DCF Model	Market observation discount rate, Swap interest rate
Investment properties		5,370,047		3	DCF Model
Liabilities
Borrowings	￦	9,405,992		2	DCF Model	Bond interest rate
Other financial liabilities
Financial liabilities at fair value through profit or loss		141,280		3	DCF Model, Binomial Option Pricing Model, Monte-Carlo Simulation	Forward exchange rate Forward interest rate
Derivative financial liabilities for hedging		33,555		2	DCF Model	Market observation discount rate

F-114

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

(in millions of Korean won)	December 31, 2023
	Fair value		Level		Valuation techniques	Inputs
Assets
Trade and other receivables
Financial assets at fair value through other comprehensive income	￦	116,198		2	DCF Model	Guaranteed bond interest rate
Other financial assets
Financial assets at fair value through profit or loss		925,750		2,3	DCF Model, Adjusted Net Asset Model, Monte-Carlo Simulation	Market Interest rate, Underlying asset price
Financial assets at fair value through other comprehensive income		449,232		2,3	DCF Model, Market Approach Model	Discount rate
Derivative financial assets for hedging		159,211		2	DCF Model	Market observation discount rate, Swap interest rate
Investment properties		5,276,169		3	DCF Model
Liabilities
Borrowings	￦	9,979,545		2	DCF Model	Bond interest rate
Other financial liabilities
Financial liabilities at fair value through profit or loss		136,106		2,3	DCF Model, Binomial Option Pricing Model,	Forward exchange rate Forward interest rate
Derivative financial liabilities for hedging		24,547		2	DCF Model	Market observation discount rate

(5) Valuation Processes for Fair Value Measurements Categorized Within Level 3

The Group uses external experts that perform the fair value measurements required for financial reporting purposes. External experts report directly to the chief financial officer (CFO) and discuss the valuation processes and results with the CFO in line with the Group’s closing dates.

(6) Gains and losses on valuation at the transaction date

In the case that the Group values derivative financial instruments using inputs not based on observable market data, and the fair value calculated by the said valuation technique differs from the transaction price, then the fair value of the financial instruments is recognized as the transaction price. The difference between the fair value at initial recognition and the transaction price is deferred and amortized using a straight-line method by maturity of the financial instruments. However, in the case that inputs of the valuation techniques become observable in markets, the remaining deferred difference is immediately recognized in full in profit or loss.

F-115

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

In relation to this, details and changes of the total deferred difference for the years ended December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	2022			2023
	Derivatives used for hedging			Derivatives used for hedging
I. Beginning balance	￦	832		￦	—
II. New transactions		—			—
III. Recognized at fair value through profit or loss		(832	)		—
IV. Ending balance (I+II+III)	￦	—		￦	—

38. Interests in Unconsolidated Structured Entities

(1) Details of information about its interests in unconsolidated structured entities, which the Group does not have control over, including the nature, purpose and activities of the structured entity and how the structured entity is financed, are as follows:

Classes of entities	Nature, purpose, activities and others
Real estate finance	A structured entity incorporated for the purpose of real estate development is provided with funds by investors’ investments in equity and borrowings from financial institutions (including long-term and short-term loans and issuance of Asset Backed Commercial Paper (“ABCP”) due in three months), and based on these, the structured entity implements activities such as real estate acquisition, development and mortgage loans. The structured entity repays loan principals with funds incurred from instalment house sales after the completion of real estate development or with collection of the principal of mortgage loan. The remaining shares are distributed to investors. As of December 31, 2023, this entity is engaged in real estate finance structured entity and generates revenues by receiving dividends from direct investments in or receiving interests on loans to the structured entity. Financial institutions, including the Entity, are provided with guarantees including joint guarantees or real estate collateral from investors and others. Consequently, the entity is a priority over other parties in the preservation of claim. However, when the credit rating of investors and others decreases or when the value of real estate decreases, the entity may be obliged to cover losses.
PEF and investment funds	Minority investors including managing members contribute to Private Equity Fund (“PEF”) and investment funds incorporated for the purpose of providing funds to the small, medium, or venture entities, and the managing member implements activities such as investments in equity or loans based on the contributions. As of December 31, 2023, the entity is engaged in PEF and investment funds structured entity, and after contributing to PEF and investment funds, the entity receives dividends for operating revenues from these contributions. The entity is provided with underlying assets of PEF and investment funds as collateral. However, when the value of the underlying assets decreases, the entity may be obliged to cover losses.
Asset securitization	The Group transfers accounts receivable for handset sales to its Special Purpose Company (“SPC”) for asset securitization. SPC issues the asset-backed securities with accounts receivable for handset sales as an underlying asset and makes payment for the underlying asset acquired.

F-116

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

(2) Details of scale of unconsolidated structured entities and nature of the risks associated with an entity’s interests in unconsolidated structured entities as of December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	December 31, 2022
	Real Estate Finance		PEF and Investment Funds		Asset Securitization		Total
Total assets of unconsolidated structured entities	￦	3,539,827	￦	5,580,445	￦	2,044,989	￦	11,165,261
Assets recognized in statement of financial position
Other financial assets	￦	77,819	￦	237,907	￦	—	￦	315,726
Joint ventures and associates		123,138		268,275		—		391,413
Total	￦	200,957	￦	506,182	￦	—	￦	707,139
Maximum loss exposure1
Investment assets	￦	200,957	￦	506,182	￦	—	￦	707,139
Investment agreement and others2		40,914		91,224		—		132,138
Total	￦	241,871	￦	597,406	￦	—	￦	839,277

1 Includes the investments recognized in the Group’s financial statements and the amounts which are probable to be determined when certain conditions are met.

2 Investment agreements and others include purchase agreements, credit granting and others.

(in millions of Korean won)	December 31, 2023
	Real Estate Finance		PEF and Investment Funds		Asset Securitization		Total
Total assets of unconsolidated structured entities	￦	7,890,823	￦	4,833,966	￦	1,846,270	￦	14,571,059
Assets recognized in statement of financial position
Other financial assets	￦	216,040	￦	227,266	￦	—	￦	443,306
Joint ventures and associates		144,517		282,550		—		427,067
Total	￦	360,557	￦	509,816	￦	—	￦	870,373
Maximum loss exposure 1
Investment assets	￦	360,557	￦	509,816	￦	—	￦	870,373
Investment agreement and others 2		44,975		106,064		—		151,039
Total	￦	405,532	￦	615,880	￦	—	￦	1,021,412

1 Includes the investments recognized in the Group’s financial statements and the amounts which are probable to be determined when certain conditions are met.

2 Investment agreements and others include purchase agreements, credit granting and others.

F-117

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

39. Information About Non-controlling Interests

(1) Changes in Accumulated Non-controlling Interests

Profit or loss allocated to non-controlling interests and accumulated non-controlling interests of subsidiaries that are material to the Group for the years ended December 31, 2021, 2022 and 2023 are as follows:

(In millions of Korean won)	December 31, 2021
	Non- controlling Interests rate (%)			Accumulated non-controlling interests at the beginning of the year		Profit or loss allocated to non-controlling interests		Dividends paid to non- controlling interests			Others			Accumulated non-controlling interests at the end of the year
KT Skylife Co., Ltd.		49.7	%	￦	388,900	￦	24,795	￦	(8,279	)	￦	5,279		￦	410,695
BC Card Co., Ltd.		30.5	%		411,826		34,496		(6,434	)		59,040			498,928
KTIS Corporation		68.6	%		120,071		17,715		(1,837	)		(709	)		135,240
KTCS Corporation		79.7	%		129,502		21,394		(2,211	)		(3,574	)		145,111
Nasmedia, Co., Ltd.		56.0	%		112,549		15,185		(3,808	)		255			124,181

(In millions of Korean won)	December 31, 2022
	Non- controlling Interests rate (%)			Accumulated non-controlling interests at the beginning of the year		Profit or loss allocated to non-controlling interests		Dividends paid to non- controlling interests			Others			Accumulated non-controlling interests at the end of the year
KT Skylife Co., Ltd.		49.8	%	￦	410,695	￦	7,127	￦	(8,284	)	￦	13,651		￦	423,189
BC Card Co., Ltd.		30.5	%		498,928		47,909		(7,641	)		(14,539	)		524,657
KTIS Corporation		66.7	%		135,240		14,965		(2,226	)		(6,577	)		141,402
KTCS Corporation		78.3	%		145,111		18,888		(2,721	)		(7,397	)		153,881
Nasmedia, Co., Ltd.		56.0	%		124,181		15,610		(4,187	)		(179	)		135,425

(In millions of Korean won)	December 31, 2023
	Non- controlling Interests rate (%)			Accumulated non-controlling interests at the beginning of the year		Profit or loss allocated to non-controlling interests			Dividends paid to non- controlling interests			Others			Accumulated non-controlling interests at the end of the year
KT Skylife Co., Ltd.		49.4	%	￦	423,189	￦	(47,355	)	￦	(8,287	)	￦	(6,192	)	￦	361,355
BC Card Co., Ltd.		30.5	%		524,657		25,355			(4,960	)		3,023			548,075
KTIS Corporation		66.7	%		141,402		5,947			(2,451	)		(1,872	)		143,026
KTCS Corporation		78.3	%		153,881		14,228			(3,001	)		(2,313	)		162,795
Nasmedia Co., Ltd		55.9	%		135,425		10,679			(4,028	)		(467	)		141,609

F-118

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

(2) Summarized Financial Information on Subsidiaries

The summarized financial information for each subsidiary with non-controlling interests that are material to the Group, before inter-company eliminations, is as follows:

	December 31, 2022
(in millions of Korean won)	KT Skylife Co., Ltd.		BC Card Co., Ltd.		KTIS Corporation		KTCS Corporation		Nasmedia, Co., Ltd.
Current assets	￦	420,701	￦	3,152,622	￦	102,121	￦	296,209	￦	435,359
Non-current assets		938,465		2,513,453		294,087		123,517		81,586
Current liabilities		274,637		2,879,551		103,698		188,379		261,381
Non-current liabilities		229,042		1,229,649		95,506		40,240		14,349
Equity		855,487		1,556,875		197,004		191,107		241,215
	December 31, 2023
(in millions of Korean won)	KT Skylife Co., Ltd.		BC Card Co., Ltd.		KTIS Corporation		KTCS Corporation		Nasmedia, Co., Ltd.
Current assets	￦	425,661	￦	3,739,847	￦	111,313	￦	304,508	￦	411,774
Non-current assets		795,182		2,613,031		336,296		130,391		101,537
Current liabilities		353,839		3,661,263		116,271		187,621		251,207
Non-current liabilities		125,531		1,061,169		127,248		47,228		11,129
Equity		741,473		1,630,446		204,090		200,050		250,975

Summarized consolidated statements of comprehensive income for the years ended December 31, 2021,2022 and 2023 are as follows:

	2021
(in millions of Korean won)	KT Skylife Co., Ltd.		BC Card Co., Ltd.			KTIS Corporation			KTCS Corporation			Nasmedia, Co., Ltd.
Operating revenue	￦	772,950	￦	3,580,970		￦	487,801		￦	968,499		￦	125,876
Profit for the year		62,309		120,308			24,944			19,034			27,120
Other comprehensive income (loss)		12,686		2,270			3,725			(2,120	)		871
Total comprehensive income		74,995		122,578			28,669			16,914			27,991
	2022
(in millions of Korean won)	KT Skylife Co., Ltd.		BC Card Co., Ltd.			KTIS Corporation			KTCS Corporation			Nasmedia, Co., Ltd.
Operating revenue	￦	1,038,468	￦	3,897,090		￦	536,229		￦	1,031,010		￦	153,210
Profit for the year		20,941		148,341			15,917			17,634			27,691
Other comprehensive income (loss)		13,544		(5,286	)		(2,415	)		(134	)		(695	)
Total comprehensive income		34,485		143,055			13,502			17,500			26,996

F-119

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

	2023
(in millions of Korean won)	KT Skylife Co., Ltd.			BC Card Co., Ltd.		KTIS Corporation			KTCS Corporation			Nasmedia, Co., Ltd.
Operating revenue	￦	1,034,342		￦	4,027,450	￦	593,162		￦	1,035,911		￦	147,934
Profit for the year		(109,407	)		76,545		13,922			15,804			17,703
Other comprehensive income (loss)		(6,625	)		13,832		(3,162	)		(2,550	)		(1,890	)
Total comprehensive income		(116,032	)		90,377		10,760			13,254			15,813

Summarized consolidated statements of cash flows for the years ended December 31, 2021,2022 and 2023 are as follows:

	2021
(in millions of Korean won)	KT Skylife Co., Ltd.			BC Card Co., Ltd.			KTIS Corporation			KTCS Corporation			Nasmedia, Co., Ltd.
Cash flows from operating activities	￦	102,947		￦	(157,645	)	￦	49,011		￦	6,945		￦	44,500
Cash flows from investing activities		(352,116	)		(283,313	)		(27,143	)		(1,039	)		(16,966	)
Cash flows from financing activities		230,010			526,563			(23,126	)		(16,622	)		(9,843	)
Net increase (decrease) in cash and cash equivalents		(19,159	)		85,605			(1,258	)		(10,716	)		17,691
Cash and cash equivalents at beginning of year		99,834			240,584			31,779			75,440			53,720
Exchange differences		(3	)		293			—			(840	)		(15	)
Cash and cash equivalents at end of the year		80,672			326,482			30,521			63,884			71,396

	2022
(in millions of Korean won)	KT Skylife Co., Ltd.			BC Card Co., Ltd.			KTIS Corporation			KTCS Corporation			Nasmedia, Co., Ltd.
Cash flows from operating activities	￦	176,407		￦	(798,043	)	￦	13,809		￦	19,423		￦	22,015
Cash flows from investing activities		(78,928	)		(7,733	)		9,813			13,245			3,845
Cash flows from financing activities		(79,455	)		914,441			(29,199	)		(35,578	)		(11,136	)
Net increase (decrease) in cash and cash equivalents		18,024			108,665			(5,577	)		(2,910	)		14,724
Cash and cash equivalents at beginning of year		80,672			326,482			30,521			63,884			71,396
Exchange differences		(1	)		(100	)		—			840			13
Cash and cash equivalents at end of the year		98,695			435,047			24,944			61,814			86,133

F-120

KT Corporation and Subsidiaries

Notes to the Consolidated Financial Statements

December 31, 2021, 2022 and 2023

	2023
(in millions of Korean won)	KT Skylife Co., Ltd.			BC Card Co., Ltd.			KTIS Corporation			KTCS Corporation			Nasmedia, Co., Ltd.
Cash flows from operating activities	￦	207,207		￦	82,883		￦	50,892		￦	55,146		￦	8,116
Cash flows from investing activities		(125,343	)		(74,430	)		(17,636	)		(5,901	)		(30,910	)
Cash flows from financing activities		(50,811	)		(67,609	)		(32,872	)		(26,948	)		(11,077	)
Net increase (decrease) in cash and cash equivalents		31,053			(59,156	)		384			22,297			(33,871	)
Cash and cash equivalents at beginning of year		98,695			435,047			24,944			61,814			86,133
Exchange differences		—			(95	)		—			—			15
Cash and cash equivalents at end of the year		129,748			375,796			25,328			84,111			52,277

(3) Transactions with Non-controlling Interests

The effect of changes in the ownership interest on the equity attributable to owners of the Group for the years ended December 31, 2021, 2022 and 2023 is summarized as follows:

(in millions of Korean won)	2021		2022		2023
Carrying amount of non-controlling interests acquired	￦	14,702	￦	19,272	￦	3,022
Consideration paid to non-controlling interests		1,095		69,652		213,819
Effect of changes in equity (net amount)	￦	15,797	￦	88,924	￦	216,841

40. Events After the Reporting Period

(1) The Company has decided to acquire treasury stocks (￦27,100 million) in accordance with a resolution of the Board of Directors dated February 7, 2024, to enhance shareholder value. The acquired treasury stocks (695,775 shares) were retired in March 25, 2024.

(2) The company issued the following bonds after the end of the reporting period (unit: ￦ million).

Type	Issued Date		Annual interest rates			Maturity		Korean won
The 200-1st Public bond		Feb. 27, 2024		3.552	%		Feb. 27, 2026-		120,000
The 200-2nd Public bond		Feb. 27, 2024		3.608	%		Feb. 26, 2027-		200,000
The 200-3rd Public bond		Feb. 27, 2024		3.548	%		Feb. 27, 2029-		80,000

F-121

SIGNATURES

The registrant hereby certifies that it meets all of the requirements for filing on Form 20-F and that it has duly caused and authorized the undersigned to sign this annual report on its behalf.

KT CORPORATION
(Registrant)
/s/ YOUNG-SHUB KIM
Name:	Young-Shub Kim
Title:	Representative Director and Chief Executive Officer

Date: April 30, 2024

Exhibit Index

1	Articles of Incorporation of KT Corporation (English translation)
2.1*	Deposit Agreement dated as of May 25, 1999 entered into among KT Corporation, Citibank, N.A., as depositary, and all Holders and Beneficial Owners of American Depositary Shares evidenced by the American Depositary Receipts issued thereunder, including the form of American depositary receipt (incorporated herein by reference to Exhibit (a)(i) of the Registrant’s Registration Statement (Registration No. 333-13578) on Form F-6)
2.2*	Form of Amendment No. 1 to Deposit Agreement dated as of May 25, 1999 entered into among KT Corporation, Citibank, N.A., as depositary, and all Holders and Beneficial Owners of American Depositary Shares evidenced by the American Depositary Receipts issued thereunder, including the form of American depositary receipt (incorporated herein by reference to Exhibit (a)(ii) of the Registrant’s Registration Statement (Registration No. 333-13578) on Form F-6)
2.3*	Letter from Citibank, N.A., as depositary, to the Registrant relating to the establishment of a direct registration system for ADSs and the issuance of uncertified ADSs as part of the direct registration system (incorporated herein by reference to Exhibit 2.4 of the Registrant’s Annual Report on Form 20-F filed on June 30, 2008)
2.4	Description of common stock (see Item 10.B. Memorandum and Articles of Association)
2.5*	Description of American Depositary Shares (incorporated herein by reference to Exhibit 2.6 of the Registrant’s Annual Report on Form 20-F filed on April 29, 2020)
8.1	List of subsidiaries of KT Corporation
12.1	Certification pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
12.2	Certification pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
13.1	Certification pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
97.1	Regulation on Recovery of Erroneously Awarded Compensation to Executive Officers
101.INS	Inline XBRL Instance Document – the instance document does not appear in the Interactive Data File as its XBRL tags are embedded within the Inline XBRL document.
101.SCH	Inline XBRL Taxonomy Extension Schema Document
101.CAL	Inline XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF	Inline XBRL Taxonomy Extension Definition Linkbase Document
101.LAB	Inline XBRL Taxonomy Extension Label Linkbase Document
101.PRE	Inline XBRL Taxonomy Extension Presentation Linkbase Document
104	The cover page for the Company’s Annual Report on Form 20-F for the year ended December 31, 2023, has been formatted in Inline XBRL

* Filed previously.

(P) Paper filing.

EX-1

Exhibit 1

THE ARTICLES OF INCORPORATION

OF

KT Corporation

Adopted on October 1, 1997

Amended on December 8, 1997

September 18, 1998 March 19, 1999

March 24, 2000

March 21, 2001

March 22, 2002

August 20, 2002

March 14, 2003

March 12, 2004

March 11, 2005

August 19, 2005

March 10, 2006

March 16, 2007

January 14, 2009

March 27, 2009

March 12, 2010

March 11, 2011

March 16, 2012

March 15, 2013

March 27, 2015

March 25, 2016

March 24, 2017

March 23, 2018

March 29, 2019

March 30, 2020

March 29, 2021

March 31, 2022

March 31, 2023

June 30, 2023

March 28, 2024

CHAPTER I. GENERAL PROVISIONS

Article 1. (Name) The name of the Corporation shall be “Chusik Hoesa KT”, which shall be written in English as “KT Corporation” (hereafter “KT”).

Article 2. (Purpose) The objective of KT is to engage in the following business activities:

1. Information and communications business

2. New media business and Internet Multimedia Broadcasting Business

3. Development and sale of software and contents

4. Sale and distribution of information communication equipment

5. Testing and inspection of information communication equipment, device or facilities

6. Advertisement business

7. Retail business via telephone, mail order or online

8. IT facility construction business, electrical construction business and fire protection facility business

9. Real estate and housing business

10. Electronic banking and finance business

11. Education and learning service business

12. Security service business (Machinery system surveillance service, Facilities security service, etc.)

13. Research and technical development, education, training and promotion, overseas businesses, and export and import, manufacture and distribution related to activities mentioned in Subparagraphs 1 through 12

14. Frequency-based telecommunications services and other telecommunications services

15. Value-added telecommunications business

16. Manufacture, provision (screening) and distribution of contents such as musical records, music videos, movies, videos and games

17. Issuance and management of pre-paid electronic payment instruments, and businesses related to electronic finance such as payment gateway services

18. Sales and leasing of equipment and facilities related to the activities mentioned in Subparagraphs 14 through 17

19. Any overseas business or export and import business related to activities mentioned in Subparagraphs 14 through 18

20. Tourism

21. (Deleted)

22. New and renewable energy, energy generation business, electrical system design and business and agency business for electrical safety management

23. Health Informatics business

24. Manufacture of communication equipment, device or facilities for military purpose

25. Energy examination business, Energy service company(ESCO) business, and other R of energy use related businesses

26. Business facilities management and Business support services

27. Business related to Information Security & Certification Service

28. Activities of management consultancy

29. Warehousing and storage

30. General construction business

31. Specialized design business

32. Freight Transportation Business, Cargo Transportation Intermediation Business

33. Manufacturing and sales of medical device

34. Personal information management business and ancillary work

35. Facility rental business

36. Any and all other activities or businesses incidental to or necessary for attainment of the foregoing.

Article 3. (Location of Offices) The head office of KT (the “head office”) shall be located in Seoul or Kyunggi Province. KT may establish requisite sub-offices at site(s) pursuant to resolution of the Board of Directors.

Article 4. (Method of Public Notice) Public notice by KT shall be available at the website of the Company (https://www.kt.com) provided, however, that if it is not possible to do so due to computer system failure or other unavoidable causes, public notice by the Company shall be given in any daily newspaper published in Seoul, Republic of Korea.

CHAPTER II. SHARES OF STOCK

Article 5. (Amount of Authorized Capital)

The total number of shares authorized to be issued by KT shall be one billion shares.

Article 6. (Par Value and Types of Shares and Electronic registration for Rights to be indicated on Share certificates and Subscription right certificates)

(1) Par value per share issued by KT shall be 5,000 Korean Won. The type of shares shall be common shares and preferred shares, both of which shall be in registered form.

(2) Rights to be indicated on share certificates and subscription right certificates shall be electronically registered in the electronic register of electronic registry instead of being issued.

Article 7. (Shares to be Issued at the Time of Incorporation)

The total number of shares to be issued by KT at the time of incorporation shall be 395,675,369 shares.

Article 8. (Number and Description of Preferred Shares)

(1) The total number of Preferred Shares to be issued by KT shall be up to one-fourth (1/4) of the total number of shares issued and outstanding, which shall be without voting rights.

(2) Dividends on Preferred Shares shall be an amount not less than nine (9) percent p.a. of the par value as determined by the Board of Directors at the time of issuance.

(3) If the dividends on the Common Shares exceed those on Preferred Shares, the excess dividend amount shall also be paid to the holders of Preferred Shares commensurate to the rate applicable to Common Shares.

(4) If dividends on Preferred Shares are not paid for any fiscal year, the holders of such Preferred Shares shall be entitled to receive such accumulated unpaid dividend in priority to the holders of Common Shares from the dividends payable in the next fiscal year.

Article 9. (Preemptive Rights)

(1) When KT issues new shares, the shareholders of KT shall be entitled to subscribe for such new shares in proportion to their existing shareholdings.

(2) Notwithstanding Paragraph (1) above, new shares may be issued to persons other than the shareholders of KT, in the following cases:

1. When the new shares are issued by public offering or subscribed by underwriters pursuant to Article 4 and Article 119 of the Financial Investment Services and Capital Markets Act (“FSCMA”);

2. When the members of the Employee Stock Ownership Association of KT have preemptive rights to subscribe for such new shares pursuant to Article 165-7 of the FSCMA;

3. When the new shares are represented by depositary receipt pursuant to Article 165-16 of the FSCMA

4. When the new shares are issued by the exercise of stock options set forth in Article 10 of these Articles of Incorporation;

5. When the new shares are issued in order to accomplish specific business purposes such as strategic alliance, inducement of foreign funds, other capital raising requirements, introduction of new technology, and improvement of financial structure.

6. When the new shares are issued by a resolution of the Board of Directors through a general public offering pursuant to Article 165-6 of the FSCMA. However, in such case, the total number of the shares to be issued shall not exceed ten percent (10%) of the total number of KT issued and outstanding; or

7. When there exists an immediate need for the company to raise funds, new shares can be issued to domestic and foreign financial institutions (enacted on March 21, 2001).

(3) The method of disposition of shares in respect of which preemptive rights have not been exercised or where fractions of shares occur shall be determined by a resolution of the Board of Directors.

(4) Notwithstanding Paragraph (1) above, shareholders who acquire shares in violation of any laws and regulations or these Articles of Incorporation shall not be entitled to subscribe for new shares in respect of such shares.

Article 10. (Stock Options)

(1) KT may grant stock options to its officers and employees who have contributed, or are capable of contributing, to the establishment, management or technical innovation of KT, except for officers or employees in any of the following cases, by a Special Resolution of the General Meeting of Shareholders pursuant to Article 340-2 and Article 542-3 of the Commercial Code of Korea, to the extent not exceeding fifteen percent (15%) of the total number of issued shares, provided that KT may grant stock options by a resolution of the Board of Directors adopted by affirmative votes of two-thirds (2/3) of the directors in offices, to the extent not exceeding one percent (1%) of the total number of

issued shares. In such case, the provision of the latter part of the Proviso of Paragraph 1 of Article 38 shall apply mutatis mutandis:

1. The largest shareholder of KT and the Related Person thereto (refers to the Related Person as prescribed in Paragraph 2-5, Article 542-8 of the Commercial Code of Korea. The same shall apply in this Article); However, anyone who has become an officer of KT and thus becomes the Related Person is excluded (Including such officers who are not engaged full time at the affiliates as a director or an auditor).

2. Major Shareholders (refers to the Major Shareholders as prescribed in Paragraph (2-6) of Article 542-8 of the Commercial Code of Korea. The same shall apply hereinafter) and the Related Person thereto; However, anyone who has become an officer of KT and thus becomes the Related Person is excluded (Including such officers who are not engaged full time at the affiliates as a director or an auditor).

3. Any person who shall become a Major Shareholder of KT by exercising his/her stock options.

(2) The proviso of Paragraph (1) shall not apply to the directors of KT, and the grant of stock options pursuant to the proviso of Paragraph (1) shall be approved by the General Meeting of Shareholders which is held after such grant of stock options.

(3) The shares to be issued to the officers or employees by the exercise of their stock options (in case where KT pays in cash or shares the difference between the exercise price of stock options and the market price, refers to the shares which are the basis for such calculation) shall be Common Shares in registered form.

(4) The number of officers and employees of KT who are granted with stock options shall not exceed ninety nine percent (99%) of the total number of officers and employees in office. Stock options granted to one single officer or employee shall not exceed ten percent (10%) of total number of shares issued and outstanding.

(5) The exercise price per share of the stock options shall not be less than the price as set forth in the Commercial Code of Korea.

(6) Unless otherwise provided for by the relevant laws, the exercise period of stock options shall be determined by separate agreements, to the extent that such exercise periods shall not exceed seven (7) years from the date two (2) years have elapsed after the date of the General Meeting of Shareholders or the Meeting of the Board of Directors at which a resolution to grant such stock option rights is adopted.

(7) KT may cancel the grant of stock options by a resolution of the Board of Directors in any of the following cases:

1. When the relevant officer or employee of KT voluntarily retires from his/her office within two (2) years after the date of the General Meeting of Shareholders or the Meeting of the Board of Directors at which a resolution to grant such stock option rights is adopted;

2. When the relevant officer or employee of KT is dismissed for substantial damages incurred to KT due to his/her willful misconduct or gross negligence; or

3. When any event for the cancellation set forth in the agreement for granting such stock options occurs.

Article 11. (Equal Dividends) KT distributes dividends equally for all shares(including shares converted from convertible bonds) regardless of the issue date for the same stock, issued by the company as of the dividend base date.

Article 12. (Transfer Agent)

(1) KT may appoint a transfer agent to make entries in the register of shareholders.

(2) The transfer agent, and the place and scope of business of the transfer agent shall be determined by a resolution of the Board of Directors, and a public notice shall be given thereof.

Article 13. Void

Article 14. (Record Date)

(1) KT shall let the shareholders who are entered into the register of shareholders on December 31 of each year exercise their rights thereof at the Ordinary General Meeting of Shareholders.

(2) KT may, for convening an Extraordinary General Meeting of Shareholders or when necessary, let the shareholders who are entered into the register of shareholders on the date determined by the resolution of the Board of Directors, exercise their rights. KT shall announce the date determined by the Board of Directors before 2 weeks from the date.

CHAPTER III. DEBENTURES

Article 15. (Issuance of Convertible Bonds)

(1) KT may issue convertible bonds to persons other than shareholders to the extent that the aggregate face value of the convertible bonds so issued shall not exceed 2 trillion (2,000,000,000,000) Korean Won. Provided that, the issuance of convertible bonds to persons other than shareholders may be made in cases provided for by any of the Subparagraphs of Paragraph (2) of Article 9.

(2) The Board of Directors may determine that the convertible bonds referred to in Paragraph (1) may be issued on the condition that conversion rights will be attached to only a portion of the convertible bonds.

(3) The type of shares to be issued upon conversion of convertible bonds shall be common shares. The conversion price, which shall be equivalent to or more than the par value of the shares, shall be determined by the Board of Directors at the time of issuance.

(4) The period during which conversion rights may be exercised shall commence on the date set forth in the FSCMA after the date of issuance of the relevant convertible bonds and end on the date immediately preceding the redemption date thereof. However, the Board of Directors may adjust the conversion period in accordance with relevant laws within the above period by its resolution.

(5) In case convertible bonds are converted into shares, KT pay interest which payment time has reached before conversion.

Article 16. (Issuance of Bonds with Warrants)

(1) KT may issue bonds with warrants to persons other than shareholders to the extent that the aggregate face value of the bonds with warrants so issued shall not exceed 2 trillion (2,000,000,000,000) Korean Won. Provided that, the issuance of bonds with warrants to persons other than shareholders may be made in only in cases provided for by Subparagraphs of Paragraph(2) of Article 9.

(2) The amount of new shares which can be subscribed by the holders of the bonds with warrants shall be determined by the Board of Directors, provided that the maximum amount of such new shares shall not exceed the aggregate face value of the bonds with warrants.

(3) The type of shares to be issued upon exercise of warrants shall be common shares. The issue price, which shall be equivalent to or more than the par value of the shares, shall be determined by the Board of Directors at the time of issuance.

(4) The period during which warrants may be exercised shall commence on the date set forth in the FSCMA after the date of issuance of the relevant bonds with warrants and end on the date immediately preceding the redemption date thereof. Provided that, the Board of Directors may adjust the conversion period in accordance with the relevant laws within the above period by its resolution.

Article 16-2. (Electronic registration of Rights to be indicated on Bonds and Subscription Warrants)

Rights to be indicated on bonds and subscription warrants shall be electronically registered in the electronic register of electronic registry instead of being issued.

Article 17. (Applicable Provisions regarding Issuance of Bonds)

The provisions of Articles 12 shall apply mutatis mutandis to the issuance of bonds.

CHAPTER IV. GENERAL MEETING OF SHAREHOLDERS

Article 18. (Convening of General Meeting)

(1) Ordinary General Meeting of Shareholders shall be convened within three (3) months after the date referred to paragraph (1) of Article 14, and Extraordinary General Meeting of Shareholders may be convened at any time by the Representative Director, pursuant to a resolution of the Board of Directors except as otherwise provided by the relevant laws and regulations; provided, however, that Paragraph (2) of Article (29) shall apply mutatis mutandis in the event the Representative Director fails to perform his duties.

(2) Notice of the General Meeting of Shareholders specifying the time, place and purpose thereof shall be sent to each shareholder in writing or electronically, two (2) weeks prior to the date set for the General Meeting of Shareholders. However, such notice to the shareholders who hold less than one-hundredth (1/100) of the total number of shares with voting rights may be given in the form of a public notice of the meeting appearing twice or more in The Seoul Shinmun, The Maeil Business Newspaper and The Korean Economic Daily, or in the form of public announcement on the Data Analysis, Retrieval and Transfer System (“DART”) operated by the Financial Supervisory Service or Korea Exchange in lieu of written notice in paragraph 2.

(3) General Meeting of Shareholders shall be held at the location of the head office, Seoul or its neighboring place.

Article 19. (Chairman) The Representative Director shall preside at the General Meeting of Shareholders; provided, however, that Paragraph (2) of Article 29 shall apply mutatis mutandis in the event that the Representative Director fails to perform his duties.

Article 20. (Chairman’s Right to Maintain Order)

(1) The Chairman shall suspend or cancel the proposal of any person who intentionally disrupts, by speech or behavior, the proceedings of the General Meeting of Shareholders or shall order such person to leave the General Meeting of Shareholders.

(2) If the Chairman deems it necessary for the smooth proceeding of the General Meeting of Shareholders, the Chairman may restrict the time and frequency of a shareholder’s proposal.

Article 21. (Voting by Proxy)

(1) A shareholder may exercise its voting rights by proxy.

(2) The proxy described in Paragraph (1) must file with KT a power of attorney before the opening of the General Meeting.

Article 22. (Method of Adoption of Resolutions) Resolutions of the General Meetings of Shareholders, except as otherwise provided by the relevant laws and regulations, shall be adopted if the approval of a majority vote of the shareholders present at such meeting is obtained and such majority also represents at least one-fourth (1/4) of the total number of shares issued and outstanding.

However, in which voting rights can be exercised electronically, members of the Audit Committee can be elected with the approval of a majority vote of the shareholders present at the General meeting is obtained

Article 22-2 (Exercise of Voting Rights by Writing)

(1) The Shareholders may exercise their voting rights by writing without attending the General Meetings of Shareholders in person.

(2) In case of Paragraph (1) above, KT shall send the notice of convening the General Meeting of Shareholders, together with written documents and reference materials necessary for the Shareholders to exercise their voting rights.

(3) The Shareholders desiring to exercise their voting rights by writing shall enter necessary matters in the written documents under paragraph (2) and submit them to KT by the date immediately preceding the date set for the Meeting.

Article 23. (Minutes of the General Meeting)

With respect to the proceedings of the General Meeting of Shareholders, the details of the proceedings and its resolutions shall be recorded in the minutes which shall bear the names and seals or signatures of the Chairman and the Directors present, and shall be preserved at the head office and branches.

CHAPTER V. DIRECTORS

Article 24. (Number of Directors) KT shall have not more than ten (10) directors. The number of inside directors, including the Representative Director, shall not exceed two (2), and the number of outside directors shall not exceed eight (8).

Article 25. (Election of Representative Director and Directors, etc.)

(1) The Representative Director shall be appointed among persons who possess the abilities of a chief executive officer as recommended by the Board of Directors considering the following criteria, by the resolution of the General Meeting of Shareholders.

1. Professional knowledge and experience in corporate management to enhance corporate value;

2. Communication skill to secure the trust of interested parties, both internally and externally, and establish a cooperative managerial environment;

3. Leadership capabilities that establish future business prospects based on a global perspective and elicit executives and employees to participate voluntarily; and

4. Understanding changes in the industry and professional expertise in the relevant industries, markets, and technologies to respond to such changes effectively.

(2) The appointment of the Representative Director requires a resolution by the General Meeting of Shareholders adopted by the affirmative vote of three-fifths (3/5) of the voting rights of the shareholders in attendance at the Meeting; provided, however, that such votes shall represent at least one-fourth (1/4) of the total number of issued shares of KT. However, if the Representative Director is being reappointed, the Representative Director shall be appointed by the resolution of the General Meeting of Shareholders pursuant to paragraph (3) below.

(3) The dismissal of the Representative Director requires a resolution by the General Meeting of Shareholders adopted by the affirmative vote of two-thirds (2/3) of the voting rights of the shareholders in attendance at the Meeting; provided, however, that such votes shall represent at least one-third (1/3) of the total number of issued shares of KT.

(4) Inside directors other than the Representative Director shall be elected at the General Meeting of Shareholders among the managing officers under the provision of Article 35 of these Articles of Incorporation who are recommended by the Representative Director with the consent of the Director Candidates Recommendation Committee and the approval of the Board of Directors. The Representative Director may propose to the General Meeting of Shareholders with the consent of the Board of Directors the dismissal of any inside director even during his/her term of office, when any of the following event occurs. In this case, the inside directors other than the Representative Director shall not participate in the resolution of the Board of Directors:

1. Inability to perform his/her duties for a period not less than one (1) year due to his/her physical and/or mental disorders; or

2. Remarkably poor results of his/her business management due to deficient management abilities.

(5) Notwithstanding Paragraph (4) above, if the Board of Directors has recommended a candidate for the Representative Director, the inside director shall be elected at the General Meeting of Shareholders as recommended by the candidate for the Representative Director with the consent of the Director Candidates Recommendation Committee and the approval of the Board of Directors; provided, however, that the candidate for the Representative Director is not elected as the Representative Director at the General Meeting of Shareholders, his recommendation of the candidacy for the inside directorship shall become null and void.

(6) Outside directors shall be elected by the General Meeting of Shareholders from among those who have professionalism and knowledge and are recommended by the Director Candidates Recommendation Committee pursuant to Article 42 after considering the following criteria:

1. He/she has sufficient hands-on-background or professional knowledge in his/her relevant field such as economy, management, finance, accounting, law, or relevant industrial technology that are necessary to perform his/her duties as an outside director;

2. He/she is not bound by special interest as an outside director and is able to fairly perform his/her duties for the benefit of KT and its shareholders;

3. He/she has a sense of ethics and responsibility that is fit to perform his/her duties as an outside director;

4. He/she is able to spare his/her time and efforts necessary to faithfully perform his/her duties as an outside director.

(7) Any person who falls under any of the following categories shall not become a director of KT, and upon any elected director of KT falling under any of the following categories, such director shall be dismissed:

1. Person who retired from his/her office within the last three (3) years due to his/her own faults or business responsibilities;

2. Person who is sentenced to imprisonment or more severe punishment, and three (3) years have not elapsed after the expiration of the execution of such imprisonment or determination not to execute such imprisonment; or

3. Person who is currently under the suspension of pronouncement or suspension of execution, or who is sentenced to probation, and two (2) years have not elapsed after the expiration of the probation period.

(8) Any person who falls under any of the following disqualification criteria shall not become an outside director of KT, and any elected outside director shall be dismissed if he or she falls under any of the following disqualification criteria:

1. The same person and his or her related party as defined in the Monopoly Regulation and Fair Trade Act (“MRFTA”) who controls a company in competition with KT’s major business areas (however, with respect to the definition of competitor of KT used herein, if the company engages in the same business as KT and belongs to the same enterprise group of KT, such company is not deemed to be in competition with KT. This shall have the same meaning hereafter);

2. (Deleted)

3. (Deleted)

4. Any person who falls under the disqualification criteria under the Commercial Code of Korea and other relevant laws and regulations

Article 26. (Deleted)

Article 27. (Term of Office of Directors)

(1) The term of office of directors shall be not more than three (3) years; provided, however, the term of each director may be determined differently considering the professional experience and diversity of the composition of the Board of Directors. However, if the term of office expires before the closing date of the Ordinary General Meeting of Shareholders in the last fiscal year of such term, the term of office shall be extended to the closing date of such General Meeting.

(2) The aggregated term of office of an outside director shall be not more than six (6) years. However, this shall not apply in the event that the extension of the term of office is determined by the proviso of paragraph 1.

Article 28. (By-election of Directors)

(1) In case of any vacancy in the office of a director, a director shall be elected to fill such vacancy at the General Meeting of Shareholders, provided that election thereof may not be made unless such vacancy results in lack of the requisite number of the directors or a difficulty in the administration of business.

(2) (Deleted)

Article 29. (Duties of the Representative Director and Directors)

(1) The Representative Director shall represent KT, execute businesses resolved by the Board of Directors, and manage all businesses of KT.

(2) Inside directors shall assist the Representative Director and shall perform their duties. In the event the Representative Director fails to perform his/her duties, an inside director shall perform the Representative Director’s duties. However, in the event both the Representative Director and inside directors fail to perform their duties, the duties will be performed in accordance with the order as provided in the Office Regulation.

(3) (Deleted)

(4) If a director becomes aware of any event which may cause a material damage to KT, such director should immediately report to the Auditors’ Committee thereof.

Article 30. (Duties of Directors)

(1) Directors shall perform their duties faithfully for the good of KT in accordance with the applicable laws and regulations and the provisions of these Articles of Incorporation.

(2) The directors shall not disclose any business secret of KT that they obtained in the course of performance of their duties, during and after their terms of offices.

Article 31. (Remuneration and Severance Allowance for Directors)

(1) The Remuneration for the directors shall be determined by a resolution of the General Meeting of Shareholders, and such remuneration may be paid either in cash or in combination of cash and stock.

(2) The criteria for remuneration for the Representative Director and the inside directors, and the method of payment thereof shall be determined by a resolution of the Board of Directors, which shall be reported to the General Meeting of Shareholders.

(3) The Representative Director and the inside directors shall not participate in the resolution of the Board of Directors as set forth in Paragraph (2) above.

(4) Severance allowances for directors shall be paid in accordance with KT’s regulations for payment of officers’ severance allowance adopted at the General Meeting of Shareholders.

(5) The Outside directors may be reimbursed for expenses necessary for the performance of their duties.

Article 32. (Deleted)

Article 33. (Selection of Representative Director Candidate)

(1) The Board of Directors shall determine the examination criteria for selecting the candidate for Representative Director by considering the items under Article 25(1).

(2) (Deleted)

(3) The Director Candidates Recommendation Committee shall discover and constitute the group of candidates for inside directors, outside directors, and Representative Director. The Director Candidates Recommendation Committee shall select one (1) candidate for Representative Director in compliance with the decision of the Board of the Directors by examining the candidates for Representative Director, pursuant to the examination criteria determined under Paragraph (1) above, and report to the Board of Directors the outcome of the examination thereof.

(4) The Board of Directors shall confirm the final candidate for Representative Director and recommend such person to the General Shareholders’ Meeting.

(5) The Board of Directors shall, in confirming the candidate for Representative Director, consult and decide with such candidates the terms of employment contract including the management goals.

(6) The Board of Directors shall recommend the candidate for Representative Director to the General Shareholders’ Meeting and concurrently submit a draft employment contract.

(7) The Representative Director and the inside directors shall not participate in the resolution of the Board of Directors determining the terms of employment contract including the management goals pursuant to Paragraph (5) above.

(8) The Board of Directors may decide upon matters not stipulated herein this Article and which concern the appointment and consecutive appointment of the Representative Director.

Article 34. (Execution of Employment Contract with the Candidate for Representative Director)

(1) When the draft employment contract submitted pursuant to Paragraph (6) of Article 33 above is approved at the General Shareholders’ Meeting, KT shall enter into such employment contract with the candidate for Representative Director. In such case, the Chairman of the Board of Directors shall, on behalf of KT, sign the employment contract.

(2) The Board of Directors may conduct a performance review to determine if the new Representative Director has performed his/her duties under the employment contract as provided in Paragraph (1) or hire a professional evaluation agency for such purpose.

(3) When the Board of Directors determines, based on the result of performance review under the provision of Paragraph (2) above, that the new Representative Director has failed to achieve the management goal, it may propose to dismiss the Representative Director at the General Shareholders’ Meeting.

(4) The management goal shall include revenue increase, profitability improvement, investment plan and other related business objectives and shall be determined, on a yearly basis, at the Board of Directors’ Meeting in order to achieve the goal of management plans during the term of Representative Director’s office approved by the Board of Directors. Such management goal may be established on a numerical basis, if possible.

(5) The performance review prescribed in Paragraph 2 above, shall be conducted by the Board of Directors at the closing of each fiscal year or may be delegated by the Board of Directors to a professional evaluation agency; provided, however, that if the Board of Directors deems necessary, it may conduct the performance review during any fiscal year.

(6) The Board of Directors shall report the result of the performance review prescribed in Paragraph 2 above to the General Meeting of Shareholders.

(7) The Representative Director and the inside directors may not attend the Board of Directors’ Meeting for the resolution of the agenda prescribed in Paragraphs (2) through (4).

Article 35. (Managing Officers)

(1) For the efficient operation, KT shall have managing officers including inside directors.

(2) The managing officers shall consist of positions determined by the Board of Directors.

(3) The number and remuneration of the managing officers who do not hold the position of inside directors of KT shall be determined by the Board of Directors. The severance allowance for the said managing officers shall be paid in accordance with KT’s regulations for payment of officers’ severance allowance adopted at a General Meeting of Shareholders.

(4) Managing officers who do not hold the position of inside directors of KT shall be elected by the Representative Director of KT, whose term of office shall not exceed three (3) years.

(5) All matters concerning the respective duties of managing officers shall be determined by the Representative Director.

Article 36. (Advisor, etc.)

The Representative Director may employ an Advisor or appoint an Advisory Council in order to receive advice and suggestions regarding important matters concerning the operation of KT’s businesses.

CHAPTER VI. BOARD OF DIRECTORS

Article 37. (Organization and Operation)

(1) The Board of Directors shall consist of the directors, and shall resolve important matters related to the execution of business of KT as prescribed in the laws and regulations and these Articles of Incorporation, which were submitted by a director as an agenda.

(2) The Board of Directors’ Meeting shall be convened by each director. However, this shall not apply in the event that a director to convene the Board of Directors’ Meeting is determined by a resolution of the Board of Directors’ Meeting.

(3) The rest of directors may request the director designated under Paragraph 2 above to convene the Board of Directors’ Meeting. However, if the designated director refuses to convene the Board of Directors’ Meeting without any justifiable reason therefor, other directors may convene the Board of Directors’ Meeting.

(4) In convening a meeting of Board of Directors, the notice thereof shall be given at least three (3) days prior to the date set for such meeting to each director; provided, however, that the above procedure may be omitted with the consent of all of the directors.

(5) Matters necessary for the operation of the Board of Directors shall be set forth in the Regulations of the Board of Directors.

(6) For the efficient management of the Board of Directors, a self evaluation regarding the activities of the Board of Directors may be conducted, and detailed matters therefor, including the evaluation method, etc. shall be determined by a resolution of the Board of Directors.

Article 38. (Resolution and Delegation)

(1) A resolution at a meeting of Board of Directors shall be adopted by the presence of a majority of all directors in offices and by the affirmative votes of a majority of the directors present. However, the resolution on the sale of equity in any subsidiary of KT accompanying transfer of management rights, which is for more than 10 billion (10,000,000,000) Korean Won of the subsidiary’s equity, shall be adopted by affirmative votes of two-thirds (2/3) of the directors in office, and the resolution on the dismissal of the Representative Director shall be adopted by the affirmative votes of two-thirds (2/3) of the outside directors in offices.

(2) The Board of Directors may delegate part of its authorities to the Representative Director.

Article 39. (Chairman)

(1) The chairman of the Board of Directors shall be elected from among the outside directors by a resolution of the Board of Directors.

(2) The term of office of the chairman shall be one (1) year.

Article 40. (Minutes of the Board of Directors) The proceeding and the result of meeting of the Board of Directors shall be recorded in the minutes, which shall bear the names, seals or signatures of the Chairman and the directors present at the meeting, and shall be kept at the head office.

Article 41. (Committees within the Board of Directors)

(1) The Board of Directors may have expert committees under its control by its resolution, in order to deliberate or decide with respect to the specific matters submitted to the Board of Directors.

1. (Deleted)

2. CG (Corporate Governance) Committee (the “CG Committee”);

3. Director Candidates Recommendation Committee;

4. Audit Committee; and

5. Other Committees which the Board of Directors deems necessary.

(2) Any necessary matters, including those regarding the composition, authority or operation, of a committee under the Board of Directors described in Paragraph 1 above shall be determined by a resolution of the Board of Directors.

Article 41-2. (CG Committee)

(1) The CG Committee shall be composed of four (4) outside directors.

(2) The CG Committee shall deliberate and decide overall matters relating to the corporate governance of the Company.

(3) Specific issues, such as the operation of the CG Committee, shall be determined by a resolution of the Board of Directors.

Article 42. (Director Candidates Recommendation Committee)

(1) The Board of Directors shall have a Director Candidates Recommendation Committee, constituted with all of outside directors, to deliberate and decide the following:

1. Discover, constitute, and train the candidates for Representative Director;

2. Select and deliberate the group of candidates for Representative Director;

3. Select the candidate for Representative Director and report the candidate to the Board of Directors;

4. Discover and constitute candidates for outside director;

5. Select and deliberate the group of candidates for outside director;

6. Recommend candidates for outside director at the General Meeting of Shareholders; and

7. Other matters related to the candidates for Representative Director and outside director that are delegated by the Board of Directors.

(2) The Director Candidates Recommendation Committee shall appoint the chairman of the committee from its members by resolution.

(3) Any member having conflict of interest with regards to the selection process of the candidates for Representative Director and directors cannot participate in the deliberation or resolution of the Director Candidates Recommendation Committee regarding such examination, election, or recommendation.

Article 43. (Audit Committee)

(1) The Audit Committee shall consist of not less than three (3) outside directors.

(2) The Audit Committee shall perform an audit of KT’s accounting books and records, and of other aspects of its business operations.

(3) Any other detailed matters regarding organization and operation of the Audit Committee shall be determined by a resolution of the Board of Directors.

Article 44. (Managing Officers’ Meeting)

(1) KT may convene managing officers’ meeting in order to consider and resolve matters delegated by the Board of Directors.

(2) Matters necessary for the organization and operation of the managing officers’ meeting set forth in Paragraph 1 above shall be determined by a resolution of the Board of Directors.

CHAPTER VII. ACCOUNTING

Article 45. (Fiscal Year) The fiscal year of KT shall be from January 1 to December 31 of each year.

Article 46. (Preparation, Submission and Maintenance of the Financial Statements, etc.)

(1) The Representative Director of KT shall prepare the following documents and supplementary documents thereto and the business report for each fiscal year, and submit such documents, after approved by the Board of Directors, to the Audit Committee, six (6) weeks prior to the date of the Ordinary General Meeting of Shareholders:

1. A balance sheet;

2. A statement of profit and loss; and

3. Other documents, as defined by the Commercial Code and enforcement ordinance, that reflect financial position and management performance of the company

4. Consolidated financial statements of the company

(2) The Audit Committee shall submit an auditor’s report to the Representative Director at least one (1) week before the General Shareholders’ Meeting.

(3) The Representative Director shall keep each document listed in Paragraph (1) together with the business report and the auditor’s report at the head office for a period of five (5) years, commencing from one week prior to the date of the Ordinary General Meeting of Shareholders. Certified copies of these documents shall be kept in each respective branch office for a period of three (3) years.

(4) The Representative Director shall submit each document listed in Paragraph (1) to the Ordinary General Meeting of Shareholders and request approval therefor. With respect to the business report, he/she shall report the contents thereof to the Ordinary General Meeting of Shareholders.

(5) When the approval of the General Meeting of Shareholders is obtained for the documents listed in Paragraph (1), the Representative Director shall, without delay, give a public notice of the balance sheet and the audit opinion thereon of an independent auditor.

Article 47. (Disposition of Profits) The unappropriated retained earnings for each fiscal year of KT shall be disposed of as following order:

1. Legal Reserves;

2. Other statutory reserves;

3. Amortization by way of the appropriation of the retained earnings;

4. Dividends; and

5. Voluntary reserve.

Article 48 (Retirement of Shares)

Pursuant to Article (165-3) of the FSCMA, KT may, by a resolution of the Board of Directors, retire the shares within the scope of profits attributable to the shareholders.

Article 48-2. (Treasury Stock Report)

KT shall report the purpose, plans for retirement and disposal of the treasury stock held at the annual general shareholder’s meetings.

Article 48-3 (Acquisition of Stock of Other Companies for Cross Shareholding)

When KT acquires the stocks of other companies for cross shareholding by way of selling or exchanging treasury stocks, it shall be approved by the General Meeting of Shareholders.

Article 49. (Payment of Dividends)

(1) Dividends may be paid either in cash, in shares or in other property.

(2) In case of stock dividends, if KT has issued several types of shares, different types of shares may be allotted by a resolution of the General Meeting of Shareholders.

(3) In case of stock or other property dividends, dividends may be paid in cash for shareholders who hold less than a certain number of stocks.

(4) (Deleted)

(5) The dividends referred to in Paragraph (1) shall be paid to the shareholders or registered pledgees registered in the registry of shareholders as of the date determined by the resolution of the Board of Directors. When the Company decides the date for determining the shareholders eligible for dividends, it shall make announcement two weeks before the record date.

(6) The rights to dividends shall be extinguished if it is not exercised within five (5) years from the date when the relevant dividend was declared, and such unclaimed dividends shall belong to KT.

Article 49-2. (Quarterly Dividends)

(1) The Company may pay quarterly dividends in cash to the Shareholders who hold the shares at the end of March, June or September from the commencement of the fiscal year by a resolution of the Board of Directors.

(2) The dividends referred to in Paragraph (1) shall be paid to the shareholders or registered pledgees who are registered in the registry of shareholders.

(3) All matters, including the limitation on the amount and specific method of the quarterly dividends referred to in Paragraph (1), shall comply with relevant laws including Financial Investment Services and Capital Markets Act.

(4) The dividends referred to in Paragraph (1) shall be subject to Paragraph (6) of Article 49.

CHAPTER VIII. SUPPLEMENTARY PROVISIONS

Article 50. (Guarantee of Personnel Status)

(1) Any employee of KT shall not receive a dismissal, suspension, reduction in compensation, reprimand and other disadvantageous orders, without any justifiable reasons therefor.

(2) The retirement age of company employees shall be as prescribe by THE ACT ON PROHIBITION OF AGE DISCRIMINATION IN EMPLOYMENT AND AGED EMPLOYMENT PROMOTION.

Article 51. (Publication of Management Information)

KT shall make public any and all matters deemed to be necessary for the promotion of transparency in management.

ADDENDUM

Article 1. (Enforcement Date) These Articles of Incorporation shall be effective from October 1, 1997.

Article 2. (Term of Office of the First President and Standing Directors) Notwithstanding Paragraph (1), Article (29) hereof, the term of office of the first President and the standing directors to be elected at the General Meeting of Shareholders convened after the execution of these Articles of Incorporation shall be extended until the end of the Ordinary General Meeting of Shareholders convened after the expiration of the said term of office.

Article 3. (Term of Office of First Non-Standing Director) (1) Pursuant to Article (3) of the Addenda of the Special Act, candidates for non-standing directors who are recommended by the Temporary Non-standing Directors Recommendation Committee shall be classified into three groups, i.e., first, second and third groups, which shall consist of one, two and three persons, respectively.

(2) Notwithstanding Article (29), Paragraph (1) hereof, the term of office of a non-standing director in the first group shall expire at the close of the first Ordinary General Meeting of Shareholders convened after one (1) year has elapsed. The term of office of non-standing directors in the second and third group shall expire at the close of the first Ordinary General Meetings of Shareholders convened after two (2) and three (3) years have elapsed, respectively.

Article 4. (Special Provisions for Term of Office of Standing Directors succeed to the Term of Office of an Executive Officer) In the event that a former executive officer who has been elected prior to the date of enforcement of these Articles of Incorporation is elected as a first standing director of KT after the enforcement of these Articles, his/her term of office may be shortened to the remainder of the term of office of an executive officer prior to the date of enforcement of these Articles of Incorporation.

ADDENDUM (December 8, 1997)

These articles of Incorporation shall be effective from the date of resolution of the general meeting of shareholders thereon.

ADDENDUM (September 18, 1998)

Article 1. (Enforcement Date)These Articles of Incorporation shall be effective from the date of resolution thereon of the general meetings of shareholders.

Article 2. (Interim Measures for the Acquisition of Shares of KT by Foreigners) Those provisions of Paragraph (3), Article (10) hereof shall not be applicable where Foreigners have acquired any shares of KT prior to the date of enforcement of these Articles of Incorporation pursuant to the relevant laws and regulations. In this regard, the number of shares so acquired shall be included in the maximum aggregate shareholdings ceiling prescribed in Item 1, Paragraph (2), Article (10) above.

ADDENDUM (March 19, 1999)

Article 1. (Enforcement Date) These Articles of Incorporation shall be effective from the date of resolution thereon of the general meetings of shareholders.

Article 2. (Interim Measure) The cumulative voting system provided for in Article (382-2) of the Commercial Code shall not apply until each of the requirements set forth in Paragraph (1), Article (21) of the Special Act has been satisfied.

ADDENDUM (March 24, 2000)

These Articles of Incorporation shall be effective from the date of resolution thereon of the general meeting of shareholders.

ADDENDUM (March 21, 2001)

These Articles of Incorporation shall be effective from the date of resolution thereon of the general meeting of shareholders.

ADDENDUM (March 22, 2002)

These Articles of Incorporation shall be effective as of the date of resolution of the general meeting of Shareholders.

ADDENDUM (August 20, 2002)

Article1. (Enforcement Date) These Articles of Incorporation shall become effective from the date on which a resolution on the foregoing amendments is adopted at the General Meeting of Shareholders. Provided, however, that the amended provision of Article 41-3 shall become effective from the date following the day on which the first General Meeting of Shareholders is convened after enforcement of these amended Articles of Incorporation.

Article 2. (Interim Measures regarding Auditor) (1) The amended provisions regarding auditor of Articles 27, 28, 29, 30, 32, 33, 37 and 40 shall remain invalid, concurrently upon establishment of the Audit Committee.

(2) The term, “auditor” referred in Paragraph 3 of Article 31 and Article 44, shall be interpreted to be “Audit Committee”, respectively, concurrently upon establishment of the Audit Committee.

Article3. (Interim Measures on Increase in Number of Outside Directors)

Notwithstanding the amended provision of Article 26, a candidate for outside director recommended by the Shareholders’ Committee established in accordance with the previous AOI, shall be deemed to

have been recommended by the Outside Director Recommendation Committee, and the term of office of such additionally appointed outside director in the above shall be until the date on which the Ordinary General Meeting of Shareholders is held in the year of 2005.

ADDENDUM (March 14, 2003)

These Articles of Incorporation shall be effective from the date of resolution thereon of the general meeting of shareholders.

ADDENDUM (March 12, 2004)

These Articles of Incorporation shall become effective as of the date of resolution of the General Meeting of Shareholders.

ADDENDUM (March 11, 2005)

These Articles of Incorporation shall become effective as of the date when the General Meeting of Shareholders resolved adoption hereof.

ADDENDUM (August 19, 2005)

These Articles of Incorporation shall take effect upon approval by the General Meeting of Shareholders.

ADDENDUM (March 10, 2006)

These Articles of Incorporation shall become effective as of the date of resolution of the General Meeting of Shareholders.

ADDENDUM (March 16, 2007)

These Articles of Incorporation shall become effective as of the date of resolution of the General Meeting of Shareholders.

ADDENDUM (March 27, 2009)

Article 1. (Enforcement Date) These Articles of Incorporation shall become effective upon resolution of the General Meeting of Shareholders approving the amendment hereof.

Article 2. (Interim Measure) The person who is “President (sajang)” as of the amendment date of these Articles of Incorporation will become the “President (hwejang)”, and in applying Article 32(1)-2 “ex-Presidents (sajang)” prior to the amendment date will be interpreted as “ex-Presidents (hwejang)”.

ADDENDUM (March 12, 2010)

These Articles of Incorporation shall become effective as of the date of resolution of the General Meeting of Shareholders.

ADDENDUM (March 11, 2011)

These Articles of Incorporation shall become effective as of the date of resolution of the General Meeting of Shareholders.

ADDENDUM (March 16, 2012)

These Articles of Incorporation shall become effective as of the date of resolution of the General Meeting of Shareholders. Notwithstanding the foregoing, Clause 1 of Article 46, shall become effective as of April 15, 2012.

ADDENDUM (March 15, 2013)

These Articles of Incorporation shall become effective as of the date of resolution of the General Meeting of Shareholders.

ADDENDUM (March 27, 2015)

These Articles of Incorporation shall become effective as of the date of resolution of the General Meeting of Shareholders.

ADDENDUM (March 25, 2016)

These Articles of Incorporation shall become effective as of the date of resolution of the General Meeting of Shareholders.

ADDENDUM (March 24, 2017)

These Articles of Incorporation shall become effective as of the date of resolution of the General Meeting of Shareholders.

ADDENDUM (March 23, 2018)

These Articles of Incorporation shall become effective as of the date of resolution of the General Meeting of Shareholders.

ADDENDUM (March 29, 2019)

These Articles of Incorporation shall become effective as of the date of resolution of the General Meeting of Shareholders. Notwithstanding the foregoing, Clause 2 of Article 6, Article 13, Article 16-2 and Article 17, shall become effective as of September 16, 2019 when the Act on Electronic Registration of Stocks, Bonds, Etc. comes into effect.

ADDENDUM (March 30, 2020)

Article 1. (Enforcement Date)

These Articles of Incorporation shall become effective as of the date of resolution of the General Meeting of Shareholders.

Article 2. (Transitional Measure)

1 The candidate for President as confirmed as at the time these Articles of Incorporation enter into force, pursuant to the previous Articles of Incorporation, shall be deemed the candidate for Representative Director as confirmed by these Articles of Incorporation.

2 Resolutions and reports of the Board of Directors or committees within the Board of Director taken pursuant to the previous Articles of Associations, associated with the General Meeting of Shareholders as at the time these Articles of Incorporation enter into force, shall be deemed to have been taken in accordance with these Articles of Incorporation.

ADDENDUM (March 29, 2021)

Article 1. (Enforcement Date)

These Articles of Incorporation shall become effective as of the date of resolution of the General Meeting of Shareholders.

ADDENDUM (March 31, 2022)

Article 1. (Enforcement Date)

These Articles of Incorporation shall become effective from the date on which a resolution on the foregoing amendments is adopted at the General Meeting of Shareholders.

ADDENDUM (March 31, 2023)

Article 1. (Enforcement Date)

These Articles of Incorporation shall become effective from the date on which a resolution on the foregoing amendments is adopted at the General Meeting of Shareholders.

ADDENDUM (June 30, 2023)

Article 1. (Enforcement Date)

These Articles of Incorporation shall become effective from the date on which a resolution on the foregoing amendments is adopted at the General Meeting of Shareholders.

ADDENDUM (March 28, 2024)

Article 1. (Enforcement Date)

These Articles of Incorporation shall become effective from the date on which a resolution on the foregoing amendments is adopted at the General Meeting of Shareholders.

Article 2. (Transitional Measure on the record date to determine the shareholders who will receive the Dividends)

The paragraph (5) of Article 49 does not apply to dividends for the fiscal year prior to the enforcement of these Articles of Incorporation.

EX-8.1

Exhibit 8.1

LIST OF CONSOLIDATED SUBSIDIARIES

For a list of KT Corporation’s consolidated subsidiaries as of December 31, 2023 and their jurisdiction of incorporation, please see Note 1.2 of Notes to the Consolidated Financial Statements contained in KT Corporation’s annual report on Form 20-F for the fiscal year ended December 31, 2023.

EX-12.1

Exhibit 12.1

CERTIFICATION

I, Young-Shub Kim, certify that:

1. I have reviewed this annual report on Form 20-F of KT Corporation;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the company as of, and for, the periods presented in this report;

4. The company’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the company and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the company, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the company’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the company’s internal control over financial reporting that occurred during the period covered by the annual report that has materially affected, or is reasonably likely to materially affect, the company’s internal control over financial reporting; and

5. The company’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the company’s auditors and the audit committee of the company’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the company’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the company’s internal control over financial reporting.

Date: April 30, 2024

/s/ YOUNG-SHUB KIM

Young-Shub Kim

Representative Director and

Chief Executive Officer

EX-12.2

Exhibit 12.2

CERTIFICATION

I, Min Jang, certify that:

1. I have reviewed this annual report on Form 20-F of KT Corporation;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the company as of, and for, the periods presented in this report;

4. The company’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the company and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the company, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the company’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the company’s internal control over financial reporting that occurred during the period covered by the annual report that has materially affected, or is reasonably likely to materially affect, the company’s internal control over financial reporting; and

5. The company’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the company’s auditors and the audit committee of the company’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the company’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the company’s internal control over financial reporting.

Date: April 30, 2024

/s/ MIN JANG

Min Jang

Chief Financial Officer and

Executive Vice President

EX-13.1

Exhibit 13.1

CERTIFICATION

Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

(Subsection (a) and (b) of Section 1350, Chapter 63 of Title 18, United States Code)

Pursuant to section 906 of the Sarbanes-Oxley Act of 2002 (subsection (a) and (b) of section 1350, chapter 63 of title 18, United States Code), the undersigned officer of KT Corporation, a corporation organized under the laws of the Republic of Korea (the “Company”), does hereby certify, to such officer’s knowledge, that:

The annual report on Form 20-F for the year ended December 31, 2023 (the “Form 20-F”) fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934 and that information contained in the Form 20-F fairly presents, in all material respects, the financial condition and results of operation of the Company.

/s/ YOUNG-SHUB KIM

Young-Shub Kim

Representative Director and

Chief Executive Officer

Date: April 30, 2024

/s/ MIN JANG

Min Jang

Chief Financial Officer and

Executive Vice President

Date: April 30, 2024

A signed original of this written statement required by Section 906 of the Sarbanes-Oxley Act of 2002 has been provided to KT Corporation and will be retained by KT Corporation and furnished to the Securities and Exchange Commission or its staff upon request.

EX-97.1

Exhibit 97.1

Regulation on Recovery of Erroneously Awarded Compensation to Executive Officers

Established on November 13, 2023, Regulation No. 812

Article 1 (Purpose) The purpose of this Regulation is to set forth the matters concerning the Accounting Restatement (as defined below) of KT Corporation (the “Company”) and the subsequent recovery of the Erroneously Awarded Compensation (as defined below) to the applicable Executive Officers (as defined below) in connection with the Clawback Rules (as defined below).

Article 2 (Definitions) For purposes of this Regulation, the following capitalized terms shall have the meanings set forth below.

1. “NYSE” shall mean the New York Stock Exchange.

2. “Clawback Rules” shall mean Section 10D of the Securities and Exchange Act of 1934, as amended (the “Exchange Act”), and any applicable rules or standards adopted by the U.S. Securities and Exchange Commission (the “SEC”) thereunder (including Rule 10D-1 under the Exchange Act) or the NYSE pursuant to Rule 10D-1 under the Exchange Act (including Section 303A.14 of the New York Stock Exchange Listed Company Manual), in each case as may be in effect from time to time.

3. “Executive Officer” shall mean an executive officer who is subject to this Regulation as set forth in Article 3 hereof.

4. “Incentive-based Compensation” shall mean any compensation that is granted, earned or vested based wholly or in part upon the attainment of a Financial Reporting Measure. The Incentive-based Compensation shall be deemed to have been paid within the fiscal period during which the Financial Reporting Measure specified in the Incentive-based Compensation is attained, even if the actual payment thereof is made after the end of that fiscal period. Any Incentive-based Compensation that is subject to both the attainment of a Financial Reporting Measure and the achievement of a relevant employment- or service-based vesting condition shall be deemed to have been paid when the Financial Reporting Measure is attained, even if the Incentive-based Compensation continues to be subject to the employment- or service-based vesting condition.

5. “Erroneously Awarded Compensation” shall mean, with respect to each Executive Officer in connection with an Accounting Restatement, the amount of the Clawback Eligible Incentive Compensation that exceeds the amount of the Clawback Eligible Incentive Compensation that otherwise would have been paid to the Executive Officer had it been determined based on the restated amounts, computed without regard to any taxes paid.

6. “Board” shall mean the Board of Directors of the Company.

7. “Financial Reporting Measures” shall mean measures that are determined in accordance with the accounting principles used in preparing the Company’s financial statements, and any measures that are derived wholly or in part from such measures. Stock price and total shareholder return shall be deemed Financial Reporting Measures. No Financial Reporting Measure needs to be presented within the Company’s financial statements or included in any filing with the SEC.

8. “Accounting Restatement” shall mean an accounting restatement:

A. due to the material noncompliance of the Company with any financial reporting requirement under the securities laws, including any required accounting restatement to correct an error in previously issued financial statements that is material to the previously issued financial statements; or

B. that would result in a material misstatement if the error were corrected in the current period or left uncorrected in the current period.

9. “Restatement Date” shall mean the earlier to occur of: (i) the date the Board or a committee of the Board concludes, or reasonably should have concluded, that the Company is required to prepare an Accounting Restatement; or (ii) the date a regulator or other legally authorized body directs the Company to prepare an Accounting Restatement.

10. “Clawback Period” shall mean, with respect to any Accounting Restatement, the three completed fiscal years of the Company immediately preceding the Restatement Date and any transition period (that results from a change in the Company’s fiscal year) of less than nine months within or immediately following those three completed fiscal years.

11. “Clawback Eligible Incentive Compensation” shall mean, with respect to each applicable Executive Officer (whether or not such individual is serving as an Executive Officer at the time the Erroneously Awarded Compensation is required to be recovered to the Company), all Incentive-based Compensation received by such Executive Officer: (i) on or after October 2, 2023; (ii) after beginning service as an Executive Officer; (iii) while the Company has a class of securities listed on the NYSE; and (iv) during the applicable Clawback Period.

Article 3 (Applicable Executive Officers) The executive officers subject to this Regulation shall be the executive officers subject to the Clawback Rules, including the following persons; provided that, the specific scope thereof shall be determined by the Board or a committee of the Board comprised of outside directors delegated with the authority under this Regulation by the Board (the “Board, etc.”); provided, further, that, if the Board determines matters related to this Regulation, the relevant resolution of the Board shall be valid only if it is resolved by a separate affirmative vote of a majority of outside directors in addition to satisfying the general resolution requirements.

1. Representative director;

2. Executive (inside) director;

3. Head of department under direct control of the representative director under Article 11, Paragraph (2) of the Company’s organization regulations;

4. Principal financial officer;

5. Principal accounting officer;

6. Other executive officers who perform material business or policy making functions for the Company; and

7. Executive officers of the parent company or a subsidiary of the Company who perform material business or policy-making functions for the Company.

Article 4 (Recovery of Erroneously Awarded Compensation)

1 In the event the Company is required to prepare an Accounting Restatement, the Board, etc. shall reasonably promptly (in accordance with the applicable Clawback Rules) determine the amount of any Erroneously Awarded Compensation for each Executive Officer in connection with such Accounting Restatement and shall resonabably promptly thereafter provide each Executive Officer with written notice containing the amount of the Erroneously Awarded Compensation and a demand for repayment to the Company.

2 If the amount of any Erroneously Awarded Compensation for each Executive Officer cannot be calculated based on the information confirmed or become available through the Accounting Restatement, the performance evaluation shall be conducted again based on the applicable Financial Reporting Measures pursuant to the restated financial statements in order to calculate the amount of any Erroneously Awarded Compensation.

2

3 For the Clawback Eligible Incentive Compensation based on stock price or total shareholder return, where the amount of Erroneously Awarded Compensation is not subject to mathematical recalculation directly from the information in the applicable Accounting Restatement, the amount shall be determined by the Board, etc. based on a reasonable estimate of the effect of the Accounting Restatement on the stock price or total shareholder return upon which the Clawback Eligible Incentive Compensation was received, in which case, the Company shall maintain documentation of such determination of that reasonable estimate and provide such documentation to the NYSE.

4 The Board, etc. may seek assistance from experts in calculating the Erroneously Awarded Compensation.

5 The Board, etc. shall promptly recover the Erroneously Awarded Compensation in accordance with a method of recovery that it deems reasonable and appropriate, but in any event may not accept an amount that is less than the amount of the Erroneously Awarded Compensation except as permitted under the Clawback Rules.

6 If an Executive Officer has already reimbursed the Company for any part or whole of the Erroneously Awarded Compensation in accordance with applicable law, the Company’s regulations or as directed by the Company, the Board, etc. may deduct such reimbursed amount from the amount of the Erroneously Awarded Compensation that is subject to recovery under this Regulation.

7 Notwithstanding Article 4(1) above, the Company’s committee of independent directors responsible for executive compensation decisions, or in the absence of such a committee, a majority of the independent directors serving on the Board may determine whether it is impracticable to recover the Erroneously Awarded Compensation in any of the following cases. If the Company’s committee of independent directors responsible for executive compensation decisions, or in the absence of such a committee, a majority of the independent directors serving on the Board determines that the recovery is impracticable, the Company shall not be required to take the actions contemplated in this Article 4.

1. If, despite a reasonable attempt to recover the applicable Erroneously Awarded Compensation, the cost or expense to recover the applicable Erroneously Awarded Compensation exceeds the Clawback Eligible Incentive Compensation; provided that, the Company shall document such reasonable attempt and provide such documentation to the NYSE.

2. If recovery of the applicable Erroneously Awarded Compensation would violate the laws of the Republic of Korea where that law was adopted prior to November 28, 2022; provided that, the Company shall obtain an opinion from a Korean counsel, acceptable to the NYSE, that such recovery would result in such a violation and provide a copy of such opinion to the NYSE.

3. If recovery would likely cause an otherwise tax-qualified retirement plan, under which benefits are broadly available to employees of the Company, to fail to meet the requirements of 26 U.S.C. 401(a)(13) or 26 U.S.C. 411(a) and regulations thereunder.

8 The Company shall comply with the listing standards and requirements of the NYSE and with the applicable Clawback Rules in implementing the recovery of the Erroneously Awarded Compensation.

Article 5 (Procedures for Recovery of Erroneously Awarded Compensation)

1 In the event of recovering the Erroneously Awarded Compensation, the Board, Etc. shall recover reasonably promptly the Erroneously Awarded Compensation by a reasonable and appropriate method, which shall include, but is not limited to:

1. requiring reimbursement of the Erroneously Awarded Compensation;

3

2. seeking recovery of any gain realized on the vesting, exercise, settlement, sale, transfer or other disposition of any equity-based awards;

3. offsetting the Erroneously Awarded Compensation with any compensation to be received by the applicable Executive Officer;

4. cancelling outstanding vested or unvested equity-based awards; and/or

5. taking any other recovery action determined by the Board, etc.

2 The Board, etc. may require an applicable Executive Officer to reimburse the Company for any and all expenses reasonably incurred by the Company (including any legal costs and expenses) in recovering the Erroneously Awarded Compensation.

Article 6 (Reporting and Disclosure)

The Company shall file all disclosures with respect to this Regulation in accordance with the requirements of U.S. federal securities laws, including any disclosure required by applicable SEC rules.

Article 7 (Indemnification Prohibition)

The Company shall not exempt any applicable Executive Officer from the application of this Regulation or enter into any agreement with any applicable Executive Officer that waives the Company’s right to recovery of any Erroneously Awarded Compensation. Any such agreement in violation of this Regulation (whether or not entered into before, on or after October 2, 2023) shall be null and void. Furthermore, the Company shall not be permitted to indemnify any Executive Officer against the loss of any Erroneously Awarded Compensation that is recovered pursuant to the terms of this Regulation and/or pursuant to the Clawback Rules, including any payment for the cost of third-party insurance purchased by any Executive Officer to cover any such loss under this Regulation and/or pursuant to the Clawback Rules.

Article 8 (Submission of Acknowledgement and Acceptance Form)

The Company may require an Executive Officer to execute a consent form whereby such Executive Officer acknowledges and accepts the recovery of Erroneously Awarded Compensation pursuant to this Regulation, and may add the provisions related to the recovery of Erroneously Awarded Compensation to the employment or service agreements that are executed on or after October 2, 2023.

Article 9 (Scope of Application)

1 This Regulation shall apply to the applicable Executive Officer, his/her heirs, and administrator of inherited properties in connection with the recovery of the Erroneously Awarded Compensation.

2 This Regulation shall take precedence over all regulations of the Company with respect to the recovery of the Erroneously Awarded Compensation.

3 This Regulation shall apply regardless of the Executive Officer’s execution and delivery of a consent form referred to in Article 8 or any related agreements.

Article 10 (Interpretation and Amendment)

1 This Regulation shall be interpreted in a manner that is consistent with the Clawback Rules.

2 The Board, etc. shall make any such amendments, in part or in full, as may be necessary to comply with the Clawback Rules, the U.S. federal securities laws, the SEC regulations or the

4

NYSE regulations. No part of this Regulation shall be effective if and to the extent such part would violate the Clawback Rules, the U.S. federal securities laws, the SEC regulations, or the NYSE regulations.

Addendum (November 13, 2023)

This Regulations shall take effect on November 13, 2023.

5

XML

Cover Page	12 Months Ended
	Dec. 31, 2023 shares
Document Information [Line Items]
Document Type	20-F
Amendment Flag	false
Document Fiscal Year Focus	2023
Document Period End Date	Dec. 31, 2023
Document Fiscal Period Focus	FY
Entity Registrant Name	KT Corporation
Entity Central Index Key	0000892450
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding	246,413,422
Entity Voluntary Filers	No
Entity Address, Country	KR
ICFR Auditor Attestation Flag	true
Entity Interactive Data Current	Yes
Document Registration Statement	false
Document Annual Report	true
Document Transition Report	false
Document Shell Company Report	false
Document Accounting Standard	International Financial Reporting Standards
Entity File Number	1-14926
Entity Incorporation, State or Country Code	M5
Entity Address, Address Line One	KT Gwanghwamun Building East 33
Entity Address, Address Line Two	Jong-ro 3-Gil
Entity Address, City or Town	Jongno-gu
Entity Address, Postal Zip Code	03155
Auditor Name	Deloitte Anjin LLC
Auditor Firm ID	1098
Auditor Location	Seoul, Korea
Document Financial Statement Error Correction [Flag]	false
Samil PricewaterhouseCoopers [Member]
Document Information [Line Items]
Auditor Name	Samil PricewaterhouseCoopers
Auditor Firm ID	1103
Auditor Location	Seoul, Korea
Business Contact [Member]
Document Information [Line Items]
Entity Address, Country	KR
City Area Code	82
Local Phone Number	2-3495-3557
Entity Address, Address Line One	KT Gwanghwamun Building East 33
Entity Address, Address Line Two	Jong-ro 3-Gil
Entity Address, City or Town	Jongno-gu
Entity Address, Postal Zip Code	03155
Contact Personnel Name	Min Jang
Contact Personnel Email Address	ktir@kt.com
ADS [Member]
Document Information [Line Items]
Trading Symbol	KT
Title of 12(b) Security	American Depositary Shares
Security Exchange Name	NYSE
Ordinary shares [member]
Document Information [Line Items]
Trading Symbol	KT
Title of 12(b) Security	Ordinary share
Security Exchange Name	NYSE

XML

Consolidated Statements of Financial Position - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022
Current assets
Cash and cash equivalents	₩ 2,879,554	₩ 2,449,062
Trade and other receivables, net	7,170,289	6,098,072
Other financial assets	1,440,200	1,322,452
Current income tax assets	3,299	1,543
Inventories, net	988,351	717,673
Other current assets	2,112,553	2,101,212
Total current assets	14,594,246	12,690,014
Non-current assets
Trade and other receivables, net	1,404,168	1,491,046
Other financial assets	2,724,761	2,501,484
Property and equipment, net	14,872,079	14,772,179
Right-of-use assets	1,304,963	1,280,334
Investment properties, net	2,198,135	1,933,358
Intangible assets, net	2,533,861	3,129,833
Investments in associates and joint ventures	1,556,889	1,480,722
Deferred income tax assets	614,500	579,090
Net defined benefit assets	160,748	311,142
Other non-current assets	827,297	820,608
Total non-current assets	28,197,401	28,299,796
Total assets	42,791,647	40,989,810
Current liabilities
Trade and other payables	8,054,922	7,333,165
Borrowings	3,058,564	1,827,042
Other financial liabilities	322,099	8,791
Current income tax liabilities	236,463	232,382
Provisions	115,209	109,133
Deferred revenue	51,537	55,737
Other current liabilities	1,408,843	1,133,018
Total current liabilities	13,247,637	10,699,268
Non-current liabilities
Trade and other payables	819,558	1,064,099
Borrowings	7,159,601	8,179,643
Other financial liabilities	753,739	412,650
Defined benefit liabilities, net	63,616	51,654
Provisions	107,014	91,233
Deferred revenue	153,563	165,186
Deferred income tax liabilities	994,330	967,650
Other non-current liabilities	950,015	945,731
Total non-current liabilities	11,001,436	11,877,846
Total liabilities	24,249,073	22,577,114
Equity
Share capital	1,564,499	1,564,499
Share premium	1,440,258	1,440,258
Retained earnings	14,475,867	14,255,316
Accumulated other comprehensive income(loss)	52,407	(77,776)
Other components of equity	(802,418)	(572,152)
Equity attributable to owners of the Controlling Company	16,730,614	16,610,145
Non-controlling interest	1,811,961	1,802,551
Total equity	18,542,575	18,412,696
Total liabilities and equity	₩ 42,791,647	₩ 40,989,810

XML

Consolidated Statements of Profit or Loss - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Profit or loss [abstract]
Operating revenue and other Income	₩ 26,595,245	₩ 26,234,206	₩ 25,205,659
Revenue	26,287,201	25,638,855	24,898,005
Other income	308,044	595,351	307,654
Operating expenses	25,166,796	24,266,049	23,506,262
Operating profit	1,428,449	1,968,157	1,699,397
Finance income	486,277	690,428	726,283
Finance costs	(568,682)	(749,908)	(563,330)
Share of net profits of associates and joint ventures	(43,424)	(17,285)	116,061
Profit before income tax	1,302,620	1,891,392	1,978,411
Income tax expense	330,438	505,757	519,016
Profit for the year	972,182	1,385,635	1,459,395
Profit for the year attributable to:
Profit (loss) for the year attributable to Owners of the Controlling Company	993,325	1,260,470	1,356,878
Profit (loss) for the year attributable to Non-controlling interest	₩ (21,143)	₩ 125,165	₩ 102,517
Earnings per share attributable to the equity holders of the Controlling Company during the year (in Korean won):
Basic earnings per share	₩ 3,982	₩ 5,200	₩ 5,759
Diluted earnings per share	₩ 3,977	₩ 5,196	₩ 5,747

XML

Consolidated Statements of Comprehensive Income - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement of comprehensive income [abstract]
Profit for the year	₩ 972,182	₩ 1,385,635	₩ 1,459,395
Other comprehensive income Items that will not be reclassified to profit or loss:
Remeasurements of the net defined benefit liability	(137,465)	181,429	55,822
Shares of remeasurement gain (loss) of associates and joint ventures	(105)	(332)	(1,596)
Gain (loss) on valuation of equity instruments at fair value through other comprehensive income	121,271	(141,944)	144,890
Other comprehensive income, Items that may be subsequently reclassified to profit or loss:
Gain(loss) on valuation of debt instruments at fair value through other comprehensive income	534	(16,630)	(15,110)
Valuation gain (loss) on cash flow hedge	15,329	64,091	141,855
Other comprehensive income (loss) from cash flow hedges reclassified to profit (loss)	(37,942)	(95,421)	(136,583)
Share of other comprehensive income (loss) from associates and joint ventures	21,595	(10,851)	(24,216)
Exchange differences on translation of foreign operations	24,230	17,464	505
Total other comprehensive income	7,447	(2,194)	165,567
Total comprehensive income for the year	979,629	1,383,441	1,624,962
Total comprehensive income for the year attributable to:
Owners of the Controlling Company	996,999	1,234,651	1,510,373
Non-controlling interest	₩ (17,370)	₩ 148,790	₩ 114,589

XML

Consolidated Statements of Changes in Equity - KRW (₩) ₩ in Millions	Total	Share capital [member]	Share premium [member]	Retained earnings [member]	Accumulated other comprehensive income [member]	Other components of equity [member]	Total attributable to owners of the Controlling Company [member]	Non-controlling interest [member]
Beginning balance at Dec. 31, 2020	₩ 15,551,433	₩ 1,564,499	₩ 1,440,258	₩ 12,155,420	₩ 86,051	₩ (1,234,784)	₩ 14,011,444	₩ 1,539,989
Comprehensive income
Profit for the year	1,459,395			1,356,878			1,356,878	102,517
Remeasurements of net defined benefit liabilities	55,822			47,348			47,348	8,474
Share of gain(loss) on remeasurements of associates and joint ventures	(1,596)			(1,559)			(1,559)	(37)
Share of other comprehensive income (loss) of associates and joint ventures	(24,216)				(19,718)		(19,718)	(4,498)
Valuation gain (loss) on cash flow hedge	5,272				5,222		5,222	50
Gain (Loss) on valuation of financial instruments at fair value through other comprehensive income	129,780			76,288	47,247		123,535	6,245
Exchange differences on translation of foreign operations	505				(1,333)		(1,333)	1,838
Total comprehensive income for the year	1,624,962			1,478,955	31,418		1,510,373	114,589
Transactions with owners
Dividends paid by the Controlling Company	(326,487)			(326,487)			(326,487)
Dividends paid to non-controlling interest of subsidiaries	(23,762)							(23,762)
Acquisition and disposition of businesses	(17,566)							(17,566)
Changes in ownership interest in subsidiaries	(6,823)					15,797	15,797	(22,620)
Appropriations of loss on disposal of treasury stock				(20,498)		20,498
Acquisition of treasury stock	(190,105)					(190,105)	(190,105)
Disposal of treasury stock	50,954					50,954	50,954
Recognition of the obligation to purchase its own equity	(101,829)					(101,829)	(101,829)
Others	6,384					6,389	6,389	(5)
Subtotal	(609,234)			(346,985)		(198,296)	(545,281)	(63,953)
Ending balance at Dec. 31, 2021	16,567,161	1,564,499	1,440,258	13,287,390	117,469	(1,433,080)	14,976,536	1,590,625
Comprehensive income
Profit for the year	1,385,635			1,260,470			1,260,470	125,165
Remeasurements of net defined benefit liabilities	181,429			165,524			165,524	15,905
Share of gain(loss) on remeasurements of associates and joint ventures	(332)			(189)			(189)	(143)
Share of other comprehensive income (loss) of associates and joint ventures	(10,851)				(8,291)		(8,291)	(2,560)
Valuation gain (loss) on cash flow hedge	(31,330)				(32,140)		(32,140)	810
Gain (Loss) on valuation of financial instruments at fair value through other comprehensive income	(158,574)			4,091	(160,785)		(156,694)	(1,880)
Exchange differences on translation of foreign operations	17,464				5,971		5,971	11,493
Total comprehensive income for the year	1,383,441			1,429,896	(195,245)		1,234,651	148,790
Transactions with owners
Dividends paid by the Controlling Company	(450,393)			(450,393)			(450,393)
Dividends paid to non-controlling interest of subsidiaries	(26,407)							(26,407)
Acquisition and disposition of businesses	3,152							3,152
Changes in ownership interest in subsidiaries	121,619					88,924	88,924	32,695
Appropriations of loss on disposal of treasury stock				(11,577)		11,577
Disposal of treasury stock	763,081					763,081	763,081
Conversion of redeemable convertible preferred shares of subsidiaries to common shares	51,476						0	51,476
Others	(434)					(2,654)	(2,654)	2,220
Subtotal	462,094			(461,970)		860,928	398,958	63,136
Ending balance at Dec. 31, 2022	18,412,696	1,564,499	1,440,258	14,255,316	(77,776)	(572,152)	16,610,145	1,802,551
Comprehensive income
Profit for the year	972,182			993,325			993,325	(21,143)
Remeasurements of net defined benefit liabilities	(137,465)			(126,613)			(126,613)	(10,852)
Share of gain(loss) on remeasurements of associates and joint ventures	(105)			(118)			(118)	13
Share of other comprehensive income (loss) of associates and joint ventures	21,595				15,775		15,775	5,820
Valuation gain (loss) on cash flow hedge	(22,613)				(22,252)		(22,252)	(361)
Gain (Loss) on valuation of financial instruments at fair value through other comprehensive income	121,805			222	126,028		126,250	(4,445)
Exchange differences on translation of foreign operations	24,230				10,632		10,632	13,598
Total comprehensive income for the year	979,629			866,816	130,183		996,999	(17,370)
Transactions with owners
Dividends paid by the Controlling Company	(501,844)			(501,844)			(501,844)	0
Dividends paid to non-controlling interest of subsidiaries	(24,964)							(24,964)
Acquisition and disposition of businesses	(79,134)							(79,134)
Changes in ownership interest in subsidiaries	345,367					216,841	216,841	128,526
Appropriations of loss on disposal of treasury stock				(44,421)		44,421
Acquisition of treasury stock	(300,243)					(300,243)	(300,243)
Disposal of treasury stock	4,463					4,463	4,463
Recognition of the obligation to purchase its own equity	(298,196)					(298,196)	(298,196)
Retirement of treasury stock				(100,000)		100,000
Others	4,800					2,448	2,448	2,352
Subtotal	(849,751)			(646,265)		(230,266)	(876,531)	26,780
Ending balance at Dec. 31, 2023	₩ 18,542,575	₩ 1,564,499	₩ 1,440,258	₩ 14,475,867	₩ 52,407	₩ (802,418)	₩ 16,730,614	₩ 1,811,961

XML

Consolidated Statements of Cash Flows - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash flows from operating activities
Cash generated from operations	₩ 5,747,195	₩ 3,835,879	₩ 5,829,607
Interest paid	(361,741)	(263,520)	(257,809)
Interest received	360,614	307,091	272,061
Dividends received	60,987	68,827	74,441
Income tax paid	(303,766)	(351,212)	(356,466)
Net cash inflow from operating activities	5,503,289	3,597,065	5,561,834
Cash flows from investing activities
Collection of loans	53,885	44,287	54,934
Loans granted	(37,771)	(43,694)	(54,128)
Disposal of financial assets at fair value through profit or loss	90,487	1,298,621	609,849
Disposal of financial assets at amortized cost	1,543,663	1,046,115	690,457
Disposal of financial assets at fair value through other comprehensive income	306	97,932	244,994
Disposal of assets held-for-sale	0	4,600	0
Disposal of investments in associates and joint ventures	6,890	34,828	10,880
Acquisition of investments in associates and joint ventures	(106,389)	(280,988)	(487,828)
Disposal of property and equipment, and investment properties	100,348	178,063	174,413
Acquisition of property and equipment, and investment properties	(3,692,972)	(3,439,857)	(3,495,021)
Acquisition of financial assets at fair value through profit or loss	(220,989)	(1,317,175)	(753,907)
Acquisition of financial assets at amortized cost	(1,875,525)	(1,450,442)	(623,924)
Acquisition of financial assets at fair value through other comprehensive income	(10,267)	(449,504)	(131,674)
Disposal of intangible assets	7,078	20,088	11,624
Disposal of right-of-use assets	529	97	318
Settlement of derivative assets and liabilities	4,888	0	0
Acquisition of intangible assets	(478,685)	(545,190)	(752,181)
Acquisition of right-of-use assets	(1,065)	(2,090)	(4,261)
Acquisition of businesses	(51,561)	(41,088)	(671,359)
Disposal of businesses	46,642	6,754	39,340
Net cash outflow from investing activities	(4,620,508)	(4,838,643)	(5,137,474)
Cash flows from financing activities
Proceeds from borrowings and debentures	5,381,231	4,234,570	2,899,567
Repayments of borrowings and debentures	(5,275,113)	(2,843,249)	(1,999,173)
Settlement of derivative assets and liabilities, net	48,183	35,083	(1,496)
Cash inflow from issuance of shares to NCI	632,776	125,066	67,693
Cash outflow from issuance of shares to NCI	(7,988)	(28,848)	(11,001)
Cash inflow from other financing activities	2,082	2,193	2,556
Dividends paid to shareholders	(526,826)	(476,800)	(350,334)
Acquisition of treasury stock	(300,086)	0	(193,626)
Cash outflow from other financing activities	0	0	(60,901)
Repayment of leases liabilities	(407,051)	(378,684)	(394,567)
Net cash outflow from financing activities	(452,792)	669,331	(41,282)
Effect of exchange rate change on cash and cash equivalents	503	1,717	1,890
Net increase (decrease) in cash and cash equivalents	430,492	(570,530)	384,968
Cash and cash equivalents at beginning of year	2,449,062	3,019,592	2,634,624
Cash and cash equivalents at end of year	₩ 2,879,554	₩ 2,449,062	₩ 3,019,592

XML

General Information

12 Months Ended

Dec. 31, 2023

Text block [abstract]

General Information

1. General Information

The consolidated financial statements have been prepared by KT Corporation, the “Controlling company” as defined under IFRS 10 Consolidated Financial Statements, by consolidating 84 subsidiaries (collectively referred to as the “Group”) including BC Card Co., Ltd., etc. as described in Note 1.2

1.1 The Controlling Company

KT Corporation (the “Controlling Company”) commenced operations on January 1, 1982, when it spun off from the Korea Communications Commission (formerly the Korean Ministry of Information and Communications) to provide telecommunication services and to engage in the development of advanced communications services under the Act of Telecommunications of Korea. The headquarters are located in Seongnam City, Gyeonggi Province, Republic of Korea, and the address of its registered head office is 90, Buljeong-ro, Bundang-gu, Seongnam City, Gyeonggi Province.

On October 1, 1997, upon the announcement of the Government-Investment Enterprises Management Basic Act and the Privatization Law, the Controlling Company became a government-funded institution under the Commercial Code of Korea.

On December 23, 1998, the Controlling Company’s shares were listed on the Korea Exchange.

On May 29, 1999, the Controlling Company issued 24,282,195 additional shares and issued American Depository Shares (ADS), which represents new shares and 20,813,311 government-owned shares, on the New York Stock Exchange. On July 2, 2001, additional ADS representing 55,502,161 government-owned shares were issued on the New York Stock Exchange.

In 2002, the Controlling Company acquired the entire government-owned shares in accordance with the Korean government’s privatization plan. As of December 31, 2023, the Korean government does not own any shares in the Controlling Company.

1.2 Consolidated Subsidiaries

(1) The consolidated subsidiaries as of December 31, 2022 and 2023, are as follows

			Controlling percentage ownership1 (%)
Subsidiary	Type of business	Location	December 31, 2022	December 31, 2023	Closing month
KT Linkus Co., Ltd.	Public telephone maintenance	Korea	92.4%	92.4%	December
KT Telecop Co., Ltd.	Security service	Korea	86.8%	86.8%	December
KT Alpha Co., Ltd. 5	Data communication	Korea	73.0%	73.0%	December
KT Service Bukbu Co., Ltd	Opening services of fixed line	Korea	67.3%	67.3%	December
KT Service Nambu Co., Ltd.	Opening services of fixed line	Korea	77.3%	77.3%	December
KT Commerce Inc.	B2C, B2B service	Korea	100.0%	100.0%	December
KT Strategic Investment Fund No.3	Investment fund	Korea	100.0%	100.0%	December
KT Strategic Investment Fund No.4	Investment fund	Korea	100.0%	100.0%	December
KT Strategic Investment Fund No.5	Investment fund	Korea	100.0%	100.0%	December
BC-VP Strategic Investment Fund No.1	Investment fund	Korea	100.0%	100.0%	December
BC Card Co., Ltd.	Credit card business	Korea	69.5%	69.5%	December

			Controlling percentage ownership1 (%)
Subsidiary	Type of business	Location	December 31, 2022	December 31, 2023	Closing month
VP Inc. 5	Payment security service for credit card, others	Korea	69.7%	72.2%	December
H&C Network	Call center for financial sectors	Korea	100.0%	100.0%	December
BC Card China Co., Ltd.	Software development and data processing	China	100.0%	100.0%	December
INITECH Co., Ltd. 5	Internet banking ASP and security solutions	Korea	61.3%	63.9%	December
Smartro Co., Ltd.	VAN (Value Added Network) business	Korea	64.5%	64.5%	December
KTDS Co., Ltd. 5	System integration and maintenance	Korea	95.6%	91.6%	December
KT M&S Co., Ltd.	PCS distribution	Korea	100.0%	100.0%	December
GENIE Music Corporation 2	Online music production and distribution	Korea	36.0%	36.0%	December
KT MOS Bukbu Co., Ltd. 5	Telecommunication facility maintenance	Korea	100.0%	100.0%	December
KT MOS Nambu Co., Ltd. 5	Telecommunication facility maintenance	Korea	98.4%	98.4%	December
KT Skylife 5	Satellite TV	Korea	50.2%	50.6%	December
Skylife TV Co., Ltd.	TV contents provider	Korea	100.0%	100.0%	December
KT Estate Inc.	Residential building development and supply	Korea	100.0%	100.0%	December
KT Investment Management Inc.	Asset management, real estate and consulting services	Korea	100.0%	100.0%	December
NEXR Co., Ltd.	Cloud system implementation	Korea	100.0%	100.0%	December
KTGDH Co., Ltd.	Data center development and related service	Korea	100.0%	100.0%	December
KT Sat Co., Ltd.	Satellite communication business	Korea	100.0%	100.0%	December
Nasmedia Co., Ltd. 2,5	Solution provider and IPTV advertisement sales business	Korea	44.0%	44.1%	December
KT Sports Co., Ltd.	Management of sports teams	Korea	100.0%	100.0%	December
KT Music Contents Fund No.2	Music and contents investment business	Korea	100.0%	100.0%	December
KTCS Corporation 2,5	Database and online information provider	Korea	34.1%	34.1%	December
KTIS Corporation 2,5	Database and online information provider	Korea	33.3%	33.3%	December
KT M Mobile Co., Ltd.	Special category telecommunications operator and sales of communication device	Korea	100.0%	100.0%	December
KT Investment Co., Ltd.	Financing business for new technology	Korea	100.0%	100.0%	December
PlayD Co., Ltd.	Advertising agency	Korea	70.4%	70.4%	December
Next Connect PFV	Residential building development and supply	Korea	100.0%	100.0%	December
KT Rwanda Networks Ltd.	Network installation and management	Rwanda	51.0%	51.0%	December
AOS Ltd.	System integration and maintenance	Rwanda	51.0%	51.0%	December
KT Japan Co., Ltd.	Foreign investment business and local counter work	Japan	100.0%	100.0%	December

			Controlling percentage ownership1 (%)
Subsidiary	Type of business	Location	December 31, 2022	December 31, 2023	Closing month
East Telecom LLC	Wireless/fixed line internet business	Uzbekistan	91.6%	91.6%	December
KT America, Inc.	Foreign investment business and local counter work	USA	100.0%	100.0%	December
PT. BC Card Asia Pacific	Software development and supply	Indonesia	99.9%	99.9%	December
KT Hongkong Telecommunications Co., Ltd.	Fixed line telecommunication business	Hong Kong	100.0%	100.0%	December
Korea Telecom Singapore Pte. Ltd.	Foreign investment business and local counter work	Singapore	100.0%	100.0%	December
Texnoprosistem LLC	Fixed line internet business	Uzbekistan	100.0%	100.0%	December
Nasmedia Thailand Co., Ltd.	Internet advertising solution	Thailand	99.9%	99.9%	December
KT Huimangjieum	Manufacturing	Korea	100.0%	100.0%	December
K-REALTY RENTAL HOUSING REIT 3	Residential building	Korea	88.6%	88.6%	December
Storywiz Co., Ltd.	Contents and software development and supply	Korea	100.0%	100.0%	December
KT Engineering Co., Ltd.	Telecommunication facility construction and maintenance	Korea	100.0%	100.0%	December
KT Studio Genie Co., Ltd.	Data communication service and data communication construction business	Korea	90.9%	90.9%	December
KHS Corporation	Operation and maintenance of facilities	Korea	100.0%	100.0%	December
Lolab Co., Ltd.	Truck transportation and trucking arrangement business	Korea	79.8%	79.8%	December
HCN Co., Ltd.	Cable television service	Korea	100.0%	100.0%	December
Millie Seojae 2	Book contents service	Korea	38.6%	30.2%	December
KT ES Pte. Ltd.	Foreign investment business	Singapore	57.6%	57.6%	December
Epsilon Global Communications PTE. Ltd.	Network service industry	Singapore	100.0%	100.0%	December
Epsilon Telecommunications (SP) PTE. Ltd.	Fixed line telecommunication business	Singapore	100.0%	100.0%	December
Epsilon Telecommunications (US) PTE. Ltd.	Fixed line telecommunication business	Singapore	100.0%	100.0%	December
Epsilon Telecommunications Limited	Fixed line telecommunication business	UK	100.0%	100.0%	December
Epsilon Telecommunications (HK) Limited	Fixed line telecommunication business	Hong Kong	100.0%	100.0%	December
Epsilon US Inc.	Fixed line telecommunication business	USA	100.0%	100.0%	December
Epsilon Telecommunications (BG) EOOD	Employee support service	Bulgaria	100.0%	100.0%	December
Nasmedia-KT Alpha Future Growth Strategic Investment Fund	Investment fund	Korea	100.0%	100.0%	December
KT Strategic Investment Fund 6	Investment fund	Korea	100.0%	100.0%	December
Altimedia Corporation	Software development and delivery	Korea	100.0%	100.0%	December
Altimidia B.V. (formerly Alticast B.V.)	Software development and delivery	Netherlands	100.0%	100.0%	December

			Controlling percentage ownership1 (%)
Subsidiary	Type of business	Location	December 31, 2022	December 31, 2023	Closing month
Altimidia Vietnam (formerly Alticast Company Limited)	Software development and delivery	Vietnam	100.0%	100.0%	December
BCCARD VIETNAM LTD.	Software sales business	Vietnam	100.0%	100.0%	December
KTP SERVICES INC.	Fixed line telecommunication business	Philippines	100.0%	100.0%	December
KT RUS LLC	Foreign investment business	Russia	100.0%	100.0%	December
Hangang Real Estate Investment Trust No. 24	Investment fund	Korea	75.0%	75.0%	December
KT DX Vietnam Company Limited	Software development	Vietnam	100.0%	100.0%	December
KT Cloud Co., Ltd.	Information and communications development	Korea	100.0%	92.7%	December
Pocheon Jeonggyori Development Co., Ltd.	Residential building development	Korea	80.9%	80.9%	December
PT CRANIUM ROYAL ADITAMA	Software development	Indonesia	67.0%	67.0%	December
Juice Inc. 3,5	Online information provider/Software development and delivery	Korea	41.2%	42.6%	December
open cloud lab Co., Ltd (formerly SPARK AND ASSOCIATES INC.)	IT consulting service and Telecommunication equipment sales	Korea	100.0%	100.0%	December
KD Living, Inc.	Residential building management	Korea	—	100.0%	December
KT HEALTHCARE VINA COMPANY LIMITED	Medical service	Vietnam	—	100.0%	December
K-Realty Qualified Private Real Estate Investment Trust No. 1 4	Real estate management	Korea	—	6.5%	December
AQUA RETAIL VIETNAM COMPANY LIMITED	E-voucher issuance and trading business	Vietnam	—	100.0%	December
K-Realty Qualified Private Real Estate Investment Trust No. 4	Real estate management	Korea	—	93.9%	December

1 Sum of the interests owned by the Controlling Company and subsidiaries.

2 Although the Controlling Company owns less than 50% interest in Nasmedia, Co., Ltd., KTCS Corporation and KTIS Corporation, Millie Seojae, and GENIE Music Corporation these entities are consolidated as the Controlling Company can exercise the majority of the voting rights in its decision-making process at all times considering voting patterns at previous shareholders’ meetings.

3 Although the Controlling Company owns less than 50% interest in, Juice Inc., this entity is consolidated as the Controlling Company holds the majority of the voting right based on an agreement with other investors.

4 Although the Controlling Company owns less than 50% interest in K-Realty Qualified Private Real Estate Investment Trust No. 1, these entities are consolidated by comprehensively considering the criteria for determining control, such as ‘power’, ‘variable profit’, and ‘relationship between power and variable profit’, rather than simply judging by the interests owned by the company.

5 The number of treasury stocks held by subsidiaries are deducted from the total number of shares when calculating the controlling percentage interest.

(2) Changes in Scope of Consolidation

Subsidiaries newly included and excluded in the consolidation during the year ended December 31, 2023:

Changes	Location	Name of subsidiary	Reason
Included	Korea	KD Living, Inc.	Transferred1
Included	Vietnam	KT HEALTHCARE VINA COMPANY LIMITED	Newly established
Included	Korea	K-Realty Qualified Private Real Estate Investment Trust No. 1	Transferred2
Included	Vietnam	AQUA RETAIL VIETNAM COMPANY LIMITED	Newly established
Included	Korea	K-Realty Qualified Private Real Estate Investment Trust No. 4	Newly established
Excluded	United Arab Emirates	Epsilon M E A General Trading LLC	Liquidated
Excluded	Korea	Alpha DX Solution Co., Ltd.	Merged
Excluded	Korea	KT Strategic Investment Fund No.2	Liquidated
Excluded	Korea	LS Marine Solution Co., Ltd. (formerly KT Submarine Co., Ltd.)	Excluded3
Excluded	Korea	KT-Michigan Global Contents Fund	Liquidated
Excluded	Russia	KT Primorye IDC LLC	Liquidated

1 The entity has been reclassified from a joint venture to a consolidated entity.

2 Although the Controlling Company owns less than 50% interest in K-Realty Qualified Private Real Estate Investment Trust No. 1, these entities are consolidated by comprehensively considering the criteria for determining control, such as ‘power’, ‘variable profit’, and ‘relationship between power and variable profit’, rather than simply judging by the interests owned by the company.

3 Due to the loss of control by the parent company, the entity has been reclassified from a subsidiary to an associate company.

(3) Summarized information for consolidated subsidiaries as at and for the years ended December 31, 2021, 2022 and 2023 is as follows

(In millions of Korean won)	December 31, 20213
	Total assets		Total liabilities		Operating revenues3		Profit (loss) for the year3
KT Linkus Co., Ltd	￦	54,219	￦	53,316	￦	81,434	￦	(3,095	)
KT Submarine Co., Ltd.		110,390		10,736		31,374		(3,183	)
KT Telecop Co., Ltd.		363,224		233,797		515,456		3,985
KT Alpha Co., Ltd. (KT Hitel Co., Ltd.)		390,671		172,767		471,870		(8,692	)
KT Service Bukbu Inc.		59,341		54,070		231,602		1,128
KT Service Nambu Inc.		62,513		52,695		271,174		1,430
BC Card Co., Ltd. 1		3,933,427		2,481,004		3,580,970		120,308
H&C Network Co., Ltd. 1		88,616		4,993		227,604		11,995
Nasmedia Co., Ltd. 1		490,394		268,618		125,876		27,120
KTDS Co., Ltd. 1		341,358		199,831		632,899		21,464
KT M&S Co., Ltd.		241,377		203,051		710,634		3,496
KT MOS Bukbu Co., Ltd.		32,511		25,402		70,212		1,637
KT MOS Nambu Co., Ltd.		36,741		26,053		71,940		2,016
KT Skylife Co., Ltd. 1		1,275,645		469,694		772,950		62,309
KT Estate Inc. 1		2,370,940		791,884		577,578		213,203
KTGDH Co., Ltd.		11,464		1,560		4,423		553
KT Sat Inc.		593,616		34,169		174,750		20,830
KT Sports Inc.		29,524		19,740		67,612		(2,039	)
KT Music Contents Fund No.2		14,985		278		253		(30	)
KT-Michigan Global Contents Fund		3,552		112		13,592		10,032
KT M Mobile Inc.		144,175		40,749		204,641		5,918
KT Investment Co., Ltd. 1		87,366		66,108		21,040		(697	)
KTCS Corporation 1		416,750		234,172		968,499		19,034
KTIS Corporation		369,361		177,619		487,801		24,944
Next Connect PFV Inc.		518,441		167,963		—		(6,519	)
KT Japan Co., Ltd. 1		1,474		2,633		1,298		(142	)
KT America, Inc.		4,884		101		6,508		201
KT Rwanda Networks Ltd. 2		125,860		236,389		23,328		(28,770	)
AOS Ltd. 2		11,539		2,812		6,942		823
KT Hong Kong Telecommunications Co., Ltd.		6,613		1,346		18,825		1,313
KT Hopemate 1		6,311		2,978		12,538		116
KT Engineering Co., Ltd. (KT ENGCORE Co., Ltd.)		185,850		144,832		284,998		366
KT Studio Genie Co., Ltd. 1,		648,534		276,933		90,047		(16,443	)
Lolab Co., Ltd.		26,726		897		2,107		(134	)
East Telecom LLC 1		35,904		22,088		11,960		2,487
KT ES Pte. Ltd. 1		240,331		80,597		15,157		(6,355	)
KT Philippines		3,641		1,243		—		—
Altimedia Corporation 1		32,338		9,742		6,968		1,037

1 These companies are the intermediate controlling companies of other subsidiaries and the above financial information is from their consolidated financial statements.

2 Convertible preferred stock issued by subsidiaries as of the end of the reporting period is included in liabilities.

3 Profit or loss is included from the date of acquisition of control to the end of the reporting period.

(in millions of Korean won)	December 31, 20223
	Total assets		Total liabilities		Operating revenues3		Profit (loss) for the year3
KT Linkus Co., Ltd.	￦	47,734	￦	47,498	￦	76,135	￦	(614	)
KT Submarine Co., Ltd.		120,255		7,884		42,848		(12,126	)
KT Telecop Co., Ltd.		370,004		230,965		517,406		4,267
KT Alpha Co., Ltd. 1 (KT Hitel Co., Ltd.)		406,236		172,211		516,737		13,115
KT Service Bukbu Co., Ltd.		74,673		65,820		252,304		3,227
KT Service Nambu Co., Ltd.		80,450		66,479		301,720		3,067
BC Card Co., Ltd. 1		5,666,075		4,109,200		3,897,090		148,341
H&C Network		82,737		6,640		27,392		992
Nasmedia Co., Ltd. 1		516,945		275,730		153,210		27,691
KTDS Co., Ltd. 1		401,932		228,474		723,161		30,941
KT M&S Co., Ltd.		255,310		204,336		730,802		8,105
KT MOS Bukbu Co., Ltd.		38,684		22,553		83,085		4,607
KT MOS Nambu Co., Ltd.		42,011		25,416		83,330		5,035
KT Skylife Co., Ltd. 1		1,359,166		503,679		1,038,468		20,941
KT Estate Inc. 1		2,480,333		833,842		478,188		58,780
KT GDH Co., Ltd.		12,059		1,596		4,323		451
KT Sat Co., Ltd.		677,980		89,644		185,313		28,073
KT Sports Co., Ltd.		28,220		15,461		65,350		(7,302	)
KT Music Contents Fund No.2		15,718		277		1,040		735
KT-Michigan Global Content Fund		2,371		27		33		(1,095	)
KT M Mobile Co., Ltd.		152,114		49,816		262,918		4,731
KT Investment Co., Ltd. 1		103,354		79,182		15,136		2,840
KTCS Corporation 1		419,726		228,618		1,031,010		17,634
KTIS Corporation		396,208		199,204		536,229		15,917
Next Connect PFV		624,734		277,967		3		(3,712	)
KT Japan Co., Ltd. 1		1,888		3,141		3,263		226
KT America, Inc.		5,945		843		8,070		37
KT Rwanda Networks Ltd. 2		126,721		267,369		30,834		(27,467	)
AOS Ltd. 2		10,972		905		8,049		1,274
KT Hong Kong Telecommunications Co., Ltd.		10,505		4,768		20,413		51
KT Huimangjieum 1		6,984		2,582		22,860		494
KT Engineering Co., Ltd. (KT ENGCORE Co., Ltd.)		141,463		89,853		258,435		10,302
KT Studio Genie Co., Ltd. 1		987,270		268,911		723,580		189,498
Lolab Co., Ltd.		35,091		17,247		74,881		(7,985	)
East Telecom LLC 1		42,691		21,645		27,030		6,419
KT ES Pte. Ltd. 1		240,721		88,640		78,815		(23,957	)
KTP SERVICES INC.		3,832		2,044		776		(255	)
Altimedia Corporation 1		44,861		15,777		47,203		6,035
KT RUS LLC 1		967		16		5		(871	)
KT DX Vietnam Company Limited		1,815		6		—		26
kt cloud Co., Ltd. 1		1,348,684		245,872		432,118		14,712

1 These companies are the intermediate controlling companies of other subsidiaries and the above financial information is from their consolidated financial statements.

2 Convertible preferred stock issued by subsidiaries as of the end of the reporting period is included in liabilities.

3 Profit or loss is included from the date of acquisition of control to the end of the reporting period.

(in millions of Korean won)	December 31, 20233
	Total assets		Total liabilities		Operating revenues		Profit (loss) for the year
KT Linkus Co., Ltd.	￦	64,178	￦	63,452	￦	81,645	￦	821
KT Telecop Co., Ltd.		375,596		235,947		527,015		5,728
KT Alpha Co., Ltd.		443,639		191,254		437,308		19,352
KT Service Bukbu Co., Ltd.		63,760		55,360		242,119		1,212
KT Service Nambu Co., Ltd.		71,576		58,745		291,170		1,354
BC Card Co., Ltd. 1		6,352,878		4,722,432		4,027,450		76,545
H&C Network		81,107		4,863		27,205		1,814
Nasmedia Co., Ltd. 1		513,311		262,336		147,934		17,703
KTDS Co., Ltd. 1		393,667		202,067		727,477		33,971
KT M&S Co., Ltd.		258,477		209,075		695,856		3,783
KT MOS Bukbu Co., Ltd.		50,750		28,431		101,428		8,457
KT MOS Nambu Co., Ltd.		46,839		26,012		101,422		5,749
KT Skylife Co., Ltd. 1		1,220,842		479,369		1,034,342		(109,407	)
KT Estate Inc. 1		2,746,546		1,121,970		511,018		871
KT GDH Co., Ltd.		7,760		1,501		4,346		648
KT Sat Co., Ltd.		699,607		88,524		182,274		30,502
KT Sports Co., Ltd.		26,615		11,299		66,309		(12,386	)
KT Music Contents Fund No.2		5,558		1,772		534		(992	)
KT M Mobile Co., Ltd.		176,838		69,317		301,049		5,605
KT Investment Co., Ltd. 1		83,638		57,420		24,976		2,180
KTCS Corporation 1		434,900		234,850		1,035,911		15,804
KTIS Corporation		447,609		243,519		593,162		13,922
Next Connect PFV		946,687		629,809		—		(29,889	)
KT Japan Co., Ltd. 1		2,015		3,341		2,793		(110	)
KT America, Inc.		6,013		701		8,928		133
KT Rwanda Networks Ltd. 2		134,847		313,787		26,788		(57,628	)
AOS Ltd. 2		10,763		1,983		8,287		128
KT Hong Kong Telecommunications Co., Ltd.		11,142		5,121		19,373		143
KT Huimangjieum 1		8,073		2,715		17,687		1,012
KT Engineering Co., Ltd.		160,243		104,005		262,063		5,327
KT Studio Genie Co., Ltd. 1		989,187		259,413		542,955		13,507
Lolab Co., Ltd.		42,744		37,838		173,035		(12,938	)
East Telecom LLC 1		48,483		22,632		30,350		7,723
KT ES Pte. Ltd. 1		117,009		90,392		87,865		(124,850	)
KTP SERVICES INC.		2,967		919		671		235
Altimedia Corporation 1		48,381		12,374		45,035		7,352
KT RUS LLC		501		10		1		(378	)
KT DX Vietnam Company Limited		1,694		102		82		(207	)
KT Cloud Co., Ltd. 1		1,983,972		503,241		679,825		63,956
KT Healthcare Vina Co., Ltd.		12,730		439		—		(721	)
K-Realty Qualified Private Real Estate Investment Trust No. 1		80,266		50,693		4,682		(1,037	)
AQUA RETAIL VIETNAM COMPANY LIMITED		1,202		62		16		(248	)

1 These companies are the intermediate controlling companies of other subsidiaries and the above financial information is from their consolidated financial statements.

2 Convertible preferred stock issued by subsidiaries as of the end of the reporting period is included in liabilities.

3 Profit or loss is included from the date of acquisition of control to the end of the reporting period.

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Material Accounting Policies

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Material Accounting Policies

2 Material Accounting Policies

The principal accounting policies applied in the preparation of these consolidated financial statements are set out below. These policies have been consistently applied to all the years presented, unless otherwise stated.

2.1 Basis of Preparation

The consolidated financial statements of the Group have been prepared in accordance with International Financial Reporting Standards (“IFRS”) as issued by the International Accounting Standards Board (“IASB”).

The financial statements have been prepared on a historical cost basis, except for the following:

• Certain financial assets and liabilities (including derivative instruments)

• Defined benefit pension plans – plan assets measured at fair value

The preparation of the consolidated financial statements requires the use of critical accounting estimates. Management also needs to exercise judgement in applying the Group’s accounting policies. The areas involving a higher degree of judgment or complexity, or areas where assumptions and estimates are significant to the consolidated financial statements are disclosed in Note 3.

2.2 Changes in Accounting Policy and Disclosures

(a) New and amended standards and interpretations adopted by the Group

The Group has applied the following standards and interpretations for the first time for their annual reporting period commencing January 1, 2023.

- IFRS 17 ‘Insurance Contract’ (Amendment)

IFRS 17, which replaces IFRS 4 “Insurance Contracts,” establishes principles for recognition, measurement, and disclosure of insurance contracts, and is mainly characterized by measuring the current cost of insurance liabilities, recognizing insurance returns based on accrual accounting assumption, and marking the distinction between insurance gains and losses on investment.

The Group does not have any contracts that meet the definition of an insurance contract under IFRS 17.

- IAS 1 Presentation of Financial Statements and IFRS Practice Statement 2 Making Materiality Judgements – Disclosure of Accounting Policies (Amendment)

The amendments change the requirements in IAS 1 with regard to disclosure of accounting policies. The amendments replace all instances of the term ‘significant accounting policies’ with ‘material accounting policy information’. Accounting policy information is material if, when considered together with other information included in an entity’s financial statements, it can reasonably be expected to influence decisions that the primary users of general purpose financial statements make on the basis of those financial statements.

The supporting paragraphs in IAS 1 are also amended to clarify that accounting policy information that relates to immaterial transactions, other events or conditions is immaterial and need not be disclosed. Accounting policy information may be material because of the nature of the related transactions, other events or conditions, even if the amounts are immaterial. However, not all accounting policy information relating to material transactions, other events or conditions is itself material.

The IASB has also developed guidance and examples to explain and demonstrate the application of the ‘four-step materiality process’ described in IFRS Practice Statement 2.

- IAS 1 Presentation of Financial Statements – Disclosure of financial liabilities with condition to adjust exercise price (Amendment)

The amendments require disclosure of valuation gains or losses (limited to those recognized in the profit or loss) of the conversion options or warrants (or financial liabilities including them), if all or part of the financial instrument with exercise price that is adjusted depending on the issuer’s share price change is classified as financial liability as defined in paragraph of IAS 32 – Financial Instrument: Presentation.

- IAS 8 Accounting Polices, Changes in Accounting Estimates and Errors – Definition of Accounting Estimates (Amendment)

The amendments replace the definition of a change in accounting estimates with a definition of accounting estimates. Under the new definition, accounting estimates are “monetary amounts in financial statements that are subject to measurement uncertainty”. The definition of a change in accounting estimates was deleted.

- IAS 12 Income Taxes – Deferred Tax related to Assets and Liabilities arising from a Single Transaction (Amendment)

The amendments introduce a further exception from the initial recognition exemption. Under the amendments, an entity does not apply the initial recognition exemption for transactions that give rise to equal taxable and deductible temporary differences.

Depending on the applicable tax law, equal taxable and deductible temporary differences may arise on initial recognition of an asset and liability in a transaction that is not a business combination and affects neither accounting nor taxable profit. For example, this may arise upon recognition of a lease liability and the corresponding right-of-use asset applying IFRS 16 at the commencement date of a lease.

Following the amendments to IAS 12, an entity is required to recognise the related deferred tax asset and liability, with the recognition of any deferred tax asset being subject to the recoverability criteria in IAS 12.

- IAS 12 Income Taxes – International Tax Reform: Pillar 2 Best Regulations (Amendment)

The amendment clarifies that IAS 12 Income Taxes’ is applied to corporations arising from tax laws enacted or practically enacted to implement the Pillar 2 best rules issued by the Organization for Economic Cooperation and Development (OECD).

However, by introducing a temporary exception to the deferred tax accounting requirements of IAS 12 Income Taxes, the group does not recognize deferred tax assets and liabilities associated with Pillar 2 Income Taxes and do not disclose information about them. The group also discloses that the exception has been applied in accordance with this amendment, and that the current income tax expense (revenue) related to Pillar 2 corporate tax is disclosed separately.

There is no significant impact of the amendments listed above on the consolidated financial statements.

(b) New standards and interpretations not yet adopted by the Group

The following new accounting standards and interpretations that have been published are not mandatory for December 31, 2023 reporting periods and have not been early adopted by the Group.

- IAS 1 Presentation of Financial Statements – Classification of Liabilities as Current or Non-current (Amendment to 2020)

The amendments clarify that the classification of liabilities as current and non-current is based on rights that are existing at the end of the reporting period, specify that classification is unaffected by expectations about whether an entity will exercise its right to defer settlement of a liability, explain that rights are in existence if covenants are complied with at the end of the reporting period, and introduce a definition of ‘settlement’ to make clear that settlement refers to the transfer to the counterparty of cash, equity instruments, other assets or services.

- IAS 1 Presentation of Financial Statements – Non-current liabilities with agreements (Amendment to 2023)

The amendments regulate that only certain conditions in the borrowing arrangement (referred to as the “Agreement”) that must be observed before the end of the reporting period affect the right of the entity to defer repayment of the liability for at least 12 months after the reporting period. Even if compliance with the agreement is assessed only after the reporting period, these arrangements affect the existence of the right as of the end of the reporting period.

It also regulates that arrangements that must be observed only after the reporting period do not affect the right to defer settlement. However, if the Group’s right to defer settlement of a liability depends on the agreement that complies with within 12 months of the reporting period, disclosing the information to help users of financial statements understand the risk that the liability could be repaid within 12 months of the reporting period. This information includes information about the agreements (including the nature of the agreements, when the Group is required to comply), the carrying amount of the relevant liabilities, and the facts and circumstances indicating that they may be difficult to satisfying with.

The above amendments are applied retrospectively for annual reporting periods beginning on or after 1 January 2024, with early application permitted.

- IAS 7 ‘Cash Flow Statement’ and ‘Financial Instruments Disclosure’- Supplier Financial Agreement(Amendment)

The amendment adds the purpose of disclosure in IAS 7 ‘Cash Flow Statement’, users of financial statements should disclose information about supplier financial agreements so that they can assess the affect of them on the Group’s liabilities and cash flows. In addition, supplier financial agreements were added as an example of the requirement to amend IAS 7 to disclose information about exposure to liquidity risk concentration.

The term ‘supplier financial agreements’ is not defined; instead, the amendment presents the nature of the arrangement that should be informed.

For achieving the purpose of disclosure, the following information on supplier financial agreements must be disclosed in an integrated manner.

• the terms and conditions of an agreement

• The carrying amount of financial liabilities corresponding to the supplier’s financial agreement and the items displayed in the statement of financial position in relation to the financial liabilities

• The carrying amount corresponding to the portion of the financial liabilities that the supplier has already received from the financial provider and the items displayed in the statement of financial position in relation to the financial liabilities

• The scope of payment date for financial liabilities corresponding to supplier financial agreements and the scope of payment date for comparable purchase liabilities not corresponding to supplier financial agreements

• Types of non-cash changes in the carrying amount of financial liabilities corresponding to supplier financial agreements and their impact

• Liquidity risk information

The above amendments are applied retrospectively for annual reporting periods beginning on or after 1 January 2024, with early application permitted.

- IFRS 16 ‘Lease’ – Lease liabilities arising from leaseback (Amendment)

The amendment adds a follow-up measurement requirement for leaseback that is accounted for as sales by applying IFRS 15 ‘revenue from contracts with customers’. The amendment requires the seller to calculate a ‘lease fee’ or an ‘modified lease fee’ in such a way that the seller-less user does not recognize any difference or gain for the right to use that the seller-less user continues to hold after the lease commencement date.

The above amendments are applied retrospectively for annual reporting periods beginning on or after 1 January 2024, with early application permitted.

- IAS 1 Presentation of Financial Statements (revised in 2023) – Disclosure of Virtual Assets

The amendments, in addition to the disclosure requirements required by other Standards for transactions related to virtual assets, define the requirements for disclosure in each case: 1) holding virtual assets; 2) holding virtual assets on behalf of customers; and 3) issuing virtual assets.

If a virtual asset is held, information on the general information of the virtual asset, the applied accounting policy, the acquisition path, acquisition cost, and fair value of each virtual asset should be disclosed. In addition, when a virtual asset is issued, the performance status related to the issued virtual asset, the moment and the exposure of revenue recognition of the sold virtual asset, the quantity of virtual assets held after issuance, and important contract details should be disclosed.

The above amendments are applied retrospectively for annual reporting periods beginning on or after 1 January 2024, with early application permitted.

- IFRS 18 Presentation and Disclosure in financial statements (Amendment)

The purpose of the amendment is to set out requirements for the presentation and disclosure of information in general purpose financial statements (financial statements) to help ensure they provide relevant information that faithfully represents an entity’s assets, liabilities, equity, income and expenses. IFRS 18 applies to all financial statements that are prepared and presented in accordance with International Financial Reporting Standards and replaces IAS 1 Presentation of Financial Statements. The key changes included in the amendments include (1) an introduction of a defined structure for the statement of profit or loss including categories for classifying incomes and expenses, subtotals for operating profit and profit before financing and income taxes, (2) an introduction of specific disclosure requirements related to the statement of profit or loss which include but are not limited to management-defined performance measures, (3) enhanced guidance on the principles of aggregation and disaggregation which focus on grouping items based on their shared characteristics and (4) some other limited changes to presentation and disclosures in the financial statements.

The above amendments are applied retrospectively for annual reporting periods beginning on or after 1 January 2027, with early application permitted.

The Group is reviewing the impact of the above-listed amendments on the consolidated financial statements.

2.3 Consolidation

The Group has prepared the consolidated financial statements in accordance with IFRS 10 Consolidated Financial Statements.

(a) Subsidiaries

Subsidiaries are all entities (including special purpose entities (“SPEs”)) over which the Group has control. The Group controls an entity when the Group is exposed to, or has rights to, variable returns from its involvement with the entity and has the ability to affect those returns through its power to direct the activities of the entity. Subsidiaries are fully consolidated from the date on which control is transferred to the Group. They are deconsolidated from the date that control ceases.

The acquisition method of accounting is used to account for business combinations by the Group. The consideration transferred is measured at the fair values of the assets transferred, and identifiable assets acquired, and liabilities and contingent liabilities assumed in a business combination are measured initially at their fair values at the acquisition date. The Group recognizes any non-controlling interest in the acquired entity on an acquisition-by-acquisition basis

either at fair value or at the non-controlling interest’s proportionate share of the acquired entity’s net identifiable assets. All other non-controlling interests are measured at fair values, unless otherwise required by other standards. Acquisition-related costs are expensed as incurred.

The excess of consideration transferred, amount of any non-controlling interest in the acquired entity and acquisition-date fair value of any previous equity interest in the acquired entity over the fair value of the net identifiable assets acquired is recoded as goodwill. If those amounts are less than the fair value of the net identifiable assets of the business acquired, the difference is recognized directly in the profit or loss as a bargain purchase.

Intercompany transactions, balances and unrealized gains on transactions among group companies are eliminated. Unrealized losses are also eliminated unless the transaction provides evidence of an impairment of the transferred asset. Accounting policies of subsidiaries have been changed where necessary to ensure consistency with the policies adopted by the Group.

(b) Changes in ownership interests in subsidiaries without loss of control

Any differences between the amount of the adjustment to non-controlling interest that do not result in loss of control and any consideration paid or received is recognized in a separate reserve within equity attributable to owners of the Controlling Company.

(c) Disposal of subsidiaries

When the Group ceases to have control over a subsidiary, any retained interest in the subsidiary is remeasured to its fair value with the change in carrying amount recognized in profit or loss.

(d) Associates

Associates are entities over which the Group has significant influence but does not possess control or joint control. Investments in associates are accounted for using the equity method of accounting, after initially being recognized at cost. Unrealized gains on transactions between the Group and its associates are eliminated to the extent of the Group’s interest in the associates. If the Group’s share of losses of an associate equals or exceeds its interest in the associate (including long-term interests that, in substance, form part of the Group’s net investment in the associate), the Group discontinues recognizing its share of further losses. After the Group’s interest is reduced to zero, additional losses are provided for, and a liability is recognized, only to the extent that the Group has incurred legal or constructive obligations or made payments on behalf of the associate. If there is an objective evidence of impairment for the investment in the associate, the Group recognizes the difference between the recoverable amount of the associate and its book amount as impairment loss. If an associate uses accounting policies other than those of the Group for transactions and events in similar circumstances, if necessary, adjustments shall be made to make the associate’s accounting policies conform to those of the Group when the associate’s financial statements are used by the Group in applying the equity method.

(e) Joint arrangements

A joint arrangement, wherein two or more parties have joint control, is classified as either a joint operation or a joint venture. A joint operator recognizes its direct right to the assets, liabilities,

revenues, and expenses of joint operations and its share of any jointly held or incurred assets, liabilities, revenues, and expenses. A joint venture has rights to the net assets relating to the joint venture and accounts for that investment using the equity method.

2.4 Segment Reporting

Information of each operating segment is reported in a manner consistent with the business segment reporting provided to the chief operating decision-maker (Note 34). The chief operating decision-maker is responsible for allocating resources and assessing performance of the operating segments.

2.5 Foreign Currency Translation

(a) Functional and presentation currency

Items included in the financial statements of each of the Group’s entities are measured using the currency of the primary economic environment in which each entity operates (the “functional currency”). The consolidated financial statements are presented in Korean won, which is the Controlling Company’s functional and presentation currency.

(b) Transactions and balances

Foreign currency transactions are translated into the functional currency using the exchange rates at the dates of the transactions. Foreign exchange gains and losses resulting from the settlement of such transactions and from the translation of monetary assets and liabilities denominated in foreign currencies at year end exchange rates are generally recognized in profit or loss. They are deferred in other comprehensive income if they relate to qualifying cash flow hedges and qualifying effective portion of net investment hedges, or are attributable to monetary part of the net investment in a foreign operation.

Foreign exchange gains and losses that relate to financial instruments are presented in the statement of profit or loss, within finance costs. All other foreign exchange gains and losses are presented in the statement of profit or loss within ‘other income’ or ‘other expense’.

Non-monetary items that are measured at fair value in a foreign currency are translated using the exchange rates at the date when the fair value was determined. Translation differences on assets and liabilities carried at fair value are reported as part of the fair value gain or loss. For example, translation differences on non-monetary assets and liabilities, such as equities held at fair value through profit or loss, are recognized in profit or loss as part of the fair value gain or loss and translation differences on non-monetary assets, such as equities classified as available-for-sale financial assets, are recognized in other comprehensive income.

2.6 Financial Assets

(a) Classification

The Group classifies its financial assets in the following measurement categories:

• those to be measured at fair value through profit or loss

• those to be measured at fair value through other comprehensive income

• those to be measured at amortized cost

The classification depends on the Group’s business model for managing the financial assets and the contractual terms of the cash flows.

For financial assets measured at fair value, gains and losses will either be recorded in profit or loss or other comprehensive income. For investments in debt instruments, this will depend on the business model in which the investment is held. The Group reclassifies debt investments when, and only when, its business model for managing those assets changes.

For investments in equity instruments that are not held for trading, this will depend on whether the Group has made an irrevocable election at the time of initial recognition to account for the equity investment at fair value through other comprehensive income. Changes in fair value of the investments in equity instruments that are not accounted for as other comprehensive income are recognized in profit or loss.

(b) Measurement

At initial recognition, the Group measures a financial asset at its fair value plus, in the case of a financial asset not at fair value through profit or loss, transaction costs that are directly attributable to the acquisition of the financial asset. Transaction costs of financial assets carried at fair value through profit or loss are expensed in profit or loss.

Financial assets with embedded derivatives are considered in their entirety when determining whether their cash flows are solely payment of principal and interest.

A. Debt instruments

Subsequent measurement of debt instruments depends on the Group’s business model for managing the asset and the cash flow characteristics of the asset. The Group classifies its debt instruments into one of the following three measurement categories:

• Amortized cost: Assets that are held for collection of contractual cash flows where those cash flows represent solely payments of principal and interest are measured at amortized cost. A gain or loss on a debt investment that is subsequently measured at amortized cost and is not part of a hedging relationship is recognized in profit or loss when the asset is derecognized or impaired. Interest income from these financial assets is included in ‘finance income’ using the effective interest rate method.

• Fair value through other comprehensive income: Assets that are held for collection of contractual cash flows and for selling the financial assets, where the assets’ cash flows represent solely payments of principal and interest, are measured at fair value through other comprehensive income. Movements in the carrying amount are taken through other comprehensive income, except for the recognition of impairment loss (and reversal of impairment loss), interest income and foreign exchange gains and losses which are recognized in profit or loss. When the financial asset is derecognized, the cumulative gain or loss previously recognized in other comprehensive income is reclassified from equity to profit or loss. Interest income from these financial assets is included in ‘finance income’

using the effective interest rate method. Foreign exchange gains and losses are presented in ‘finance income’ or ‘finance costs’ and impairment loss in ‘finance costs’ or ‘operating expenses’.

• Fair value through profit or loss: Assets that do not meet the criteria for amortized cost or fair value through other comprehensive income are measured at fair value through profit or loss. A gain or loss on a debt investment that is subsequently measured at fair value through profit or loss and is not part of a hedging relationship is recognized in profit or loss and presented net in the statement of profit or loss within ‘finance income’ or ‘finance costs’ in the period in which it arises.

B. Equity instruments

The Group subsequently measures all equity investments at fair value. Where the Group’s management has elected to present fair value gains and losses on equity investments in other comprehensive income, there is no subsequent reclassification of fair value gains and losses to profit or loss following the derecognition of the investment. Dividend income from such investments continue to be recognized in profit or loss as ‘finance income’ when the Group’s right to receive payments is established.

Changes in the fair value of financial assets at fair value through profit or loss are recognized in ‘finance income’ or ‘finance costs’ in the statement of profit or loss as applicable. Impairment loss (reversal of impairment loss) on equity investments, measured at fair value through other comprehensive income, are not reported separately from other changes in fair value.

(c) Impairment

The Group assesses on a forward-looking basis the expected credit losses associated with its debt instruments carried at amortized cost and fair value through other comprehensive income. The impairment methodology applied depends on whether there has been a significant increase in credit risk. For trade receivables and lease receivables, the Group applies the simplified approach, which requires expected lifetime credit losses to be recognized from initial recognition of the receivables.

(d) Recognition and derecognition

Regular way purchases and sales of financial assets are recognized or derecognized on trade-date, the date on which the Group commits to purchase or sell the asset. Financial assets are derecognized when the rights to receive cash flows from the financial assets have expired or have been transferred and the Group has transferred substantially all the risks and rewards of ownership.

If a transfer does not result in derecognition because the Group has retained substantially all the risks and rewards of ownership of the transferred asset, the Group continues to recognize the transferred asset in its entirety and recognizes a financial liability for the consideration received.

(e) Offsetting of financial instruments

Financial assets and liabilities are offset and the net amount reported in the statements of financial position where there is a legally enforceable right to offset the recognized amounts and there is an intention to settle on a net basis or realize the assets and settle the liability simultaneously. The legally enforceable right must not be contingent on future events and must be enforceable in the normal course of business and in the event of default, insolvency or bankruptcy of the Group or the counterparty.

2.7 Derivative Instruments

Derivatives are initially recognized at fair value on the date a derivative contract is entered into and are subsequently remeasured to their fair value at the end of each reporting period. The accounting treatment for subsequent changes in fair value depends on whether the derivative is designated as a hedging instrument, and if so, the nature of the item being hedged. The Group has hedge relationships and designates certain derivatives as:

• hedges of a particular risk associated with the cash flows of recognized assets and liabilities and highly probable forecast transactions (cash flow hedges)

At inception of the hedge relationship, the Group documents the economic relationship between hedging instruments and hedged items including whether changes in the cash flows of the hedging instruments are expected to offset changes in the cash flows of hedged items.

The fair values of derivative financial instruments designated in hedge relationships are disclosed in Note 37.

The full fair value of a hedging derivative is classified as a non-current asset or liability when the remaining maturity of the hedged item is more than 12 months; it is classified as a current asset or liability when the remaining maturity of the hedged item is less than 12 months. A non-derivative financial asset and a non-derivative financial liability is classified as a current or non-current based on its expected maturity and its settlement, respectively.

The effective portion of changes in fair value of derivatives that are designated and qualify as cash flow hedges is recognized in the cash flow hedge reserve within equity to the limit of the cumulative change in fair value (present value) of the hedge item (the present value of the cumulative change in the future expected cash flows of the hedged item) from the inception of the hedge. The ineffective portion is recognized in ‘finance income (costs)’.

Amounts of changes in fair value of effective hedging instruments accumulated in equity are recognized as ‘finance income (costs)’ for the periods when the corresponding transactions affect profit or loss.

When a hedging instrument expires, or is sold, terminated, exercised, or when a hedge no longer meets the criteria for hedge accounting, any accumulated cash flow hedge reserve at that time remains in equity until the forecast transaction occurs, resulting in the recognition of a non-financial asset such as inventory. When the forecast transaction is no longer expected to occur, the cash flow hedge reserve and deferred costs of hedging that were reported in equity are immediately reclassified to profit or loss.

2.8 Trade Receivables

Trade receivables are recognized initially at the amount of consideration that is unconditional, unless they contain significant financing components when they are recognized at fair value. Trade receivables are subsequently measured at amortized cost using the effective interest method, less loss allowance. See Note 6 for further information about the Group’s accounting treatment for trade receivables and Note 2.6 (c) for a description of the Group’s accounting policy on impairment.

2.9 Inventories

Inventories are stated at the lower of cost and net realizable value. Cost is determined using the moving average method, except for inventories in-transit (specific identification method).

2.10 Property and Equipment

Property and equipment are stated at historical cost less accumulated depreciation and accumulated impairment losses. Historical cost includes expenditures that is directly attributable to the acquisition of the items.

Depreciation of all property and equipment, except for land, is calculated using the straight-line method to allocate their cost, net of their residual values, over their estimated useful lives as follows:

	Useful Life
Buildings	5 – 40 years
Structures	5 – 40 years
Machinery and equipment (Telecommunications equipment and others)	2 – 40 years
Vehicles	4 – 10 years
Tools	2 – 6 years
Office equipment	2 – 8 years

The depreciation method, residual values, and useful lives of property and equipment are reviewed at the end of each reporting period and, if appropriate, accounted for as changes in accounting estimates.

2.11 Investment Property

Real estate held for rental income or investment gains is classified as investment property and right-of-use asset. An investment property is measured initially at its cost. After recognition as an asset, investment property is carried at cost less accumulated depreciation and impairment losses. Investment property, except for land, is depreciated using the straight-line method over their useful lives from 5 to 40 years.

2.12 Intangible Assets

(a) Goodwill

Goodwill is measured as explained in Note 2.3 (a) and goodwill arising from acquisition of subsidiaries and businesses is included in intangible assets. Goodwill is tested annually for

impairment and carried at cost less accumulated impairment losses. Gains and losses on the disposal of subsidiaries and business include the carrying amount of goodwill relating to the subsidiaries and businesses sold.

For the purpose of impairment testing, goodwill acquired in a business combination is allocated to each of the CGUs, or group of CGUs, that is expected to benefit from the synergies of the combination. Goodwill is monitored at the operating segment level.

(b) Intangible assets excluding goodwill

Intangible assets, except for goodwill, are initially recognized at its historical cost, and carried at cost less accumulated amortization and accumulated impairment losses. Membership rights (condominium membership and golf membership), subscription rights, broadcast license, facility-use rights, and transportation rights that have indefinite useful life are not subject to amortization because there is no foreseeable limit to the period over which the assets are expected to be utilized. The Group amortizes intangible assets with a limited useful life using the straight-line method over the following periods:

	Useful Life
Development costs		3 – 10 years
Software		3 – 10 years
Frequency usage rights		5 – 10 years
Others1		1 – 50 years

1  Membership rights (condominium membership and golf membership), subscription rights, broadcast license, facility usage rights and transportation license included in others are classified as intangible assets with indefinite useful life.

2.13 Borrowing Costs

General and specific borrowing costs that are directly attributable to the acquisition, construction or production of a qualifying asset are capitalized during the period of time that is required to complete and prepare the asset for its intended use or sale. Investment income earned on the temporary investment of specific borrowings on qualifying assets is deducted from the borrowing costs eligible for capitalization. Other borrowing costs are expensed in the period in which they are incurred.

2.14 Government Grants

Grants from the government are recognized at their fair value where there is a reasonable assurance that the grant will be received and the Group will comply with all attached conditions. Government grants related to assets are presented in the statement of financial position by setting up the grant as deferred income that is recognized in profit or loss on a systematic basis over the useful life of the asset. Grants related to income are deferred and are presented as a credit in the statement of profit or loss within ‘other income’.

2.15 Impairment of Non-Financial Assets

Goodwill and intangible assets with indefinite useful life are tested annually for impairment at the end of each reporting period. If certain assets are deemed to be impaired, their recoverable

amount is estimated in order to determine the impairment loss. The Group estimates the recoverable amount for each asset, and, in cases when the recoverable amount cannot be estimated for an asset, the recoverable amount of the cash generating unit to which the asset belongs is estimated. Corporate assets are allocated to individual cash generating units on a reasonable and consistent basis and if they cannot be allocated to individual cash generating units, they are allocated to the smallest group of cash generating units on a reasonable and consistent basis. An impairment loss is recognized for the amount by which the asset’s carrying amount exceeds its recoverable amount (higher of its fair value less costs of disposal and value in use). Impairment loss on non-financial assets other than goodwill are evaluated for reversal at the end of each reporting period.

2.16 Trade and Other Payables

These amounts represent liabilities for goods and services provided to the Group prior to the end of reporting period which are unpaid. Trade and other payables are presented as current liabilities, unless payment is not due within 12 months after the reporting period. They are recognized initially at their fair value and subsequently measured at amortized cost using the effective interest method.

2.17 Financial Liabilities

(a) Classification and measurement

The Group’s financial liabilities at fair value through profit or loss are financial instruments held for trading. A financial liability is held for trading if it is incurred principally for the purpose of repurchasing in the near term. Derivatives that are not designated as hedging instruments or derivatives separated from financial instruments containing embedded derivatives are also categorized as held for trading.

The Group classifies non-derivative financial liabilities, except for financial liabilities at fair value through profit or loss, financial guarantee contracts and financial liabilities that arise when a transfer of financial assets does not qualify for derecognition, as financial liabilities carried at amortized cost and present as ‘trade payables and other payables’, ‘borrowings’ and ‘other financial liabilities’ in the statement of financial position.

Borrowings are initially recognized as the amount obtained by subtracting the transaction cost incurred from the fair value and is then measured as amortized cost. The difference between the consideration received (net of transaction cost) and the redemption amount is recognized as profit or loss over the period using the effective interest rate method. Fees paid to receive the borrowing limit are recognized as transaction costs for loans to the extent that they are likely to be borrowed as part or all of the borrowing limit. In this case, the fee will be deferred until the draw-down occurs. There is a high possibility that borrowings will be executed as part or all of the borrowing limit agreement (relevant fees to the extent that there is no evidence) are recognized as assets as advance payments for liquidity services and amortized over the relevant borrowing limit period.

Preferred shares that require mandatory redemption at a particular date are classified as liabilities. Interest expenses on these preferred shares using the effective interest method are recognized in the statement of profit or loss as ‘finance costs’, together with interest expenses recognized from other financial liabilities.

Borrowings are classified as current liabilities unless the Group has an unconditional right to defer settlement of the liability for at least 12 months after the reporting period.

(b) Derecognition

Financial liabilities are removed from the statement of financial position when it is extinguished; for example, when the obligation specified in the contract is discharged or cancelled or expired or when the terms of an existing financial liability are substantially modified. The difference between the carrying amount of a financial liability extinguished or transferred to another party and the consideration paid (including any non-cash assets transferred or liabilities assumed) is recognized in profit or loss.

The Group’s financial liabilities at fair value through profit or loss are financial instruments held for trading and financial liabilities designated as at fair value through profit or loss. A financial liability is held for trading if it is incurred principally for the purpose of repurchasing in the near term. A derivative that is not a designated as hedging instruments and an embedded derivative that is separated are also classified as held for trading. Financial liabilities designed as at fair value through profit or loss are structured financial liabilities containing embedded derivatives issued by the Group.

2.18 Financial Guarantee Contracts

Financial guarantee contracts are recognized as a financial liability at the time the guarantee is issued. The liability is initially measured at fair value, subsequently at the higher of the following amount, and the related liability is recognized as ‘other financial liabilities’ in the consolidated statement of financial position:

• the amount determined in accordance with the expected credit loss model under IFRS 9 Financial Instruments

• the amount initially recognized less, where appropriate, the cumulative amount of income recognized in accordance with IFRS 15 Revenue from Contracts with Customers

2.19 Compound Financial Instruments

Compound financial instruments are convertible notes that can be converted into equity instruments at the option of the holder.

The liability component of a compound financial instrument is recognized initially at the fair value of a similar liability that does not have an equity conversion option, and subsequently measured at amortized cost until extinguished on conversion or maturity of the bonds. The equity component is recognized initially on the difference between the fair value of the compound financial instrument as a whole and the fair value of the liability component. Any directly attributable transaction costs are allocated to the liability and equity components in proportion to their initial carrying amounts.

2.20 Employee Benefits

(a) Post-employment benefits

The Group operates both defined contribution and defined benefit pension plans.

A defined contribution plan is a pension plan under which the Group pays fixed contributions into a separate entity. The contributions are recognized as employee benefit expenses when an employee has rendered service.

A defined benefit plan is a pension plan that is not a defined contribution plan. Generally, post-employment benefits are payable after the completion of employment, and the benefit amount depended on the employee’s age, periods of service or salary levels. The liability recognized in the statement of financial position in respect of defined benefit pension plans is the present value of the defined benefit obligation at the end of the reporting period less the fair value of plan assets. The defined benefit obligation is calculated annually by independent actuaries using the projected unit credit method. The present value of the defined benefit obligation is determined by discounting the estimated future cash outflows using interest rates of high-quality corporate bonds that are denominated in the currency in which the benefits will be paid, and that have terms approximating to the terms of the related obligation. Remeasurement gains and losses arising from experience adjustments and changes in actuarial assumptions are recognized in the period in which they occur, directly in other comprehensive income.

Changes in the present value of the defined benefit obligation resulting from plan amendments or curtailments are recognized immediately in profit or loss as past service costs.

(b) Termination benefits

Termination benefits are payable when employment is terminated by the Group before the normal retirement date, or whenever an employee accepts voluntary redundancy in exchange for these benefits. The Group recognizes termination benefits at the earlier of the following dates: when the entity can no longer withdraw the offer of those benefits or when the entity recognizes costs for a restructuring.

(c) Long-term employee benefits

Certain entities within the Group provide long-term employee benefits that are entitled to employees with service period for ten years and above. The expected costs of these benefits are accrued over the period of employment using the same accounting methodology as used for defined benefit pension plans. The Group recognizes service cost, net interest on other long-term employee benefits and remeasurements as profit or loss for the year. These liabilities are valued annually by an independent qualified actuary.

2.21 Share-Based Payments

Equity-settled share-based payment is recognized at fair value of equity instruments granted, and employee benefit expense is recognized over the vesting period. At the end of each period, the Group revises its estimates of the number of options that are expected to vest based on the non-market vesting and service conditions. It recognizes the impact of the revision to original estimates, if any, in profit or loss, with a corresponding adjustment to equity.

The acquiree may have outstanding share-based payment transactions that the acquirer does not exchange for its share-based payment transactions. If vested, those acquiree share-based payment transactions are part of the non-controlling interest in the acquiree and are measured at their market-based measure. If unvested, the market-based measure of unvested share-based payment transactions is allocated to the non-controlling interest on the basis of the ratio of the portion of the vesting period completed to the greater of the total vesting period and the original vesting period of the share-based payment transaction. The balance is allocated to post-combination service.

2.22 Provisions

Provisions for service warranties, recoveries, litigations and claims, and others are recognized when the Group presently hold legal or constructive obligation as a result of past events, and when it is probable that an outflow of resources will be required to settle the obligation and the amount can be reliably estimated. Provisions are measured at the present value of management’s best estimate of the expenditure required to settle the present obligation at the end of the reporting period, and the increase in the provision due to the passage of time is recognized as interest expense.

2.23 Leases

(a) Lessee

The Group leases various repeater server racks, offices, communication line facilities, machinery, cars, and others.

Contracts may contain both lease and non-lease components. The Group allocates the consideration in the contract to the lease and non-lease components based on their relative stand-alone prices.

Assets and liabilities arising from a lease are initially measured on a present value basis. Lease liabilities include the net present value of the following lease payments:

• Fixed payments (including in-substance fixed payments), less any lease incentives receivable

• Variable lease payment that are based on an index or a rate, initially measured using the index or rate as at the commencement date

• Amounts expected to be payable by the Group (the lessee) under residual value guarantees

• The exercise price of a purchase option if the Group (the lessee) is reasonably certain to exercise that option, and

• Payments of penalties for terminating the lease, if the lease term reflects the Group (the lessee) exercising that option

Measurement of lease liability also includes payments to be made in optional periods if the lessee is reasonably certain to exercise an option to extend the lease.

The Group determines the lease term as the non-cancellable period of a lease, together with both (a) periods covered by an option to extend the lease if the lessee is reasonably certain to exercise

that option; and (b) periods covered by an option to terminate the lease if the lessee is reasonably certain not to exercise that option. When the lessee and the lessor each has the right to terminate the lease without permission from the other party, the Group should consider a termination penalty in determining the period for which the contract is enforceable.

The lease payments are discounted using the interest rate implicit in the lease. If that rate cannot be determined, the lessee’s incremental borrowing rate is used, which is the rate that the lessee would have to pay to borrow the funds necessary to obtain an asset of similar value in a similar economic environment with similar terms and conditions.

The Group is exposed to potential future increases in variable lease payments based on an index or rate, which are not included in the lease liability until they take effect. When adjustments to lease payments based on an index or rate take effect, the lease liability is reassessed and adjusted against the right-of-use asset.

Each lease payment is allocated between the liability and finance cost. The finance cost is charged to profit or loss over the lease period in order to produce a constant periodic rate of interest on the remaining balance of the liability for each period.

Right-of-use assets are measured at cost comprising the following:

• the amount of the initial measurement of lease liability

• any lease payments made at or before the commencement date less any lease incentives received

• any initial direct costs (leasehold deposits)

• restoration costs

The right-of-use asset is depreciated over the shorter of the asset’s useful life and the lease term on a straight-line basis. If the Group is reasonably certain to exercise a purchase option, the right-of-use asset is depreciated over the underlying asset’s useful life.

Payments associated with short-term leases and leases of low-value assets are recognized on a straight-line basis as an expense in profit or loss. Short-term leases are leases with a lease term of 12 months or less, such as vehicles, machinery, and others. Low-value assets are comprised of tools, office equipment, and others.

(b) Lessor

Lease income from operating leases where the Group is a lessor is recognized in income on a straight-line basis over the lease term. Initial direct costs incurred in obtaining an operating lease are added to the carrying amount of the underlying asset and recognized as expense over the lease term on the same basis as lease income. The respective leased assets are included in the statement of financial position based on their nature.

(c) Extension and termination option

Extension and termination options are included in a number of property and equipment leases across the Group. These terms are used to maximize operational flexibility in terms of managing contracts. The majority of extension and termination options held are exercisable only by the

Group and not by the respective lessor. Information on critical accounting estimates and assumptions related to the determination of the lease term is presented in Note 3.

2.24 Share Capital

The Controlling Company classifies ordinary shares as equity.

Where the Controlling Company purchases its own shares, the consideration paid, including any directly attributable incremental costs, is deducted from equity until the share are cancelled or reissued. When these treasury shares are reissued, any consideration received is included in equity attributable to the equity holders of the Controlling Company.

2.25 Revenue Recognition

(a) Identifying performance obligations

The Group mainly provides telecommunication services and sells handsets. The Group identifies performance obligations with a customer such as providing telecommunication services, selling handsets, and others. Revenue from handsets is recognized when a performance obligation is satisfied by transferring promised goods to customers, and the revenue from telecommunication services is recognized over the estimated contract periods of each services by transferring promised services to customers.

(b) Allocation the transaction price and revenue recognition

The Group allocates the transaction price to each performance obligation identified in the contract based on a relative stand-alone selling prices of the goods or services being provided to the customer. To allocate the transaction price to each performance obligation on a relative stand-alone price basis, the Group determines the stand-alone selling price at contract inception of the distinct good or service underlying each performance obligation in the contract and allocate the transaction price in proportion to those stand-alone selling price. The stand-alone selling price is the price at which the Group would sell a promised good or service separately to the customer. The best evidence of a stand-alone selling price is the observable price of a good or service when the Group sells that good or service separately in similar circumstances and to similar customers. The Group recognizes the allocated amount as contract assets or contract liabilities, and amortizes it through the remaining period which is adjusted in operating income.

(c) Incremental contract acquisition costs

The Group pays commission fees when new customers subscribe to telecommunication services. The incremental contract acquisition costs are those commission fees that the Group incurs to acquire a contract with a customer that would not have been incurred if the contract had not been acquired. The Group recognizes the incremental contract acquisition costs as an asset and amortizes it over the expected period of benefit. However, as a practical expedient, the Group may recognize the incremental contract acquisition costs as an expense when it is incurred if the amortization period of the asset is one year or less.

(d) Commission fees

Commission fees are recognized when it is probable that future economic benefits will flow to the entity and these benefits can be reliably measured. Revenues are measured at the fair value of the consideration received.

2.26 Current and Deferred Income Tax

The tax expense for the period consists of current and deferred tax. Current and deferred tax is recognized in profit or loss, except to the extent that it relates to items recognized in other comprehensive income or directly in equity. In this case, the tax is also recognized in other comprehensive income or directly in equity, respectively.

The current income tax expense is measured at the amount expected to be paid to taxation authorities, using the tax rates (and tax laws) that have been enacted or substantively enacted by the end of the reporting period.

Management periodically evaluates positions taken in tax returns with respect to situations in which applicable tax regulation is subject to interpretation, and considers whether it is probable that a taxation authority will accept an uncertain tax treatment. The Group measures its tax balances either based on the most likely amount or the expected value, depending on which method provides a better prediction of the resolution of the uncertainty.

Deferred income tax is provided in full, using the liability method, on temporary differences arising between the tax bases of assets and liabilities and their carrying amounts in the consolidated financial statements. However, deferred income tax is not accounted for if it arises from initial recognition of an asset or liability in a transaction other than a business combination that at the time of the transaction affects neither accounting profit nor taxable profit or loss.

Deferred tax assets are recognized only if it is probable that future taxable amount will be available to utilize those temporary differences and losses.

The Group recognizes a deferred tax liability all taxable temporary differences associated with investments in subsidiaries, associates, and interests in joint arrangements, except to the extent that the Group is able to control the timing of the reversal of the temporary difference and it is probable that the temporary difference will not reverse in the foreseeable future. In addition, the Group recognizes a deferred tax asset for all deductible temporary differences arising from such investments to the extent that it is probable the temporary difference will reverse in the foreseeable future and taxable profit will be available against which the temporary difference can be utilized.

Deferred tax assets and liabilities are offset when there is a legally enforceable right to offset current tax assets and liabilities and when the deferred tax balances relate to the same taxation authority. Current tax assets and liabilities are offset when the Group has a legally enforceable right to offset and intends either to settle on a net basis, or to realize the assets and settle the liability simultaneously.

2.27 Dividend

Dividend distribution to the Group’s shareholders is recognized as a liability in the financial statements in the period in which the dividends are approved by the Group’s shareholders.

2.28 Approval on Issuance of the Consolidated Financial Statements

The consolidated financial statements of 2023 were approved for issuance by the Board of Directors on April 11, 2024 and are subject to change with the approval of shareholders at their Annual General Meeting.

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Critical Accounting Estimates and Assumptions

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Critical Accounting Estimates and Assumptions

3 Critical Accounting Estimates and Assumptions

The preparation of financial statements requires the Group to make estimates and assumptions concerning the future. Management also needs to exercise judgement in applying the Group’s accounting policies. Estimates and assumptions are continually evaluated and are based on historical experience and other factors, including expectations of future events that are believed to be reasonable under the circumstances. As the resulting accounting estimates will, by definition, seldom equal the actual results, it poses significant risk of resulting in a material adjustment.

Estimates and assumptions that have significant risks of causing a material adjustment to the carrying amounts of assets and liabilities within the next financial year are discussed below. Additional information of significant judgement and assumptions of certain items are included in relevant notes.

3.1 Impairment of Non-Financial Assets (including Goodwill)

The Group determines the recoverable amount of a cash generating unit (CGU) based on fair value or value-in-use calculations to assess non-financial assets (including goodwill) for impairment (Note 12, 13).

3.2 Income Taxes

The Group’s taxable income generated from these operations are subject to income taxes based on tax laws and interpretations of tax authorities in numerous jurisdictions. There are many transactions and calculations for which the ultimate tax determination is uncertain (Note 29).

If certain portion of the taxable income is not used for investments or increase in wages or dividends in accordance with the Tax System for Recirculation of Corporate Income, the Group is liable to pay additional income tax calculated based on the tax laws. Accordingly, the measurement of current and deferred income tax is affected by the tax effects from the new tax system. As the Group’s income tax is dependent on the investments as well as wage increase, there is uncertainty in measuring the final tax effects(Note 29).

3.3 Fair Value of Financial Instruments

The fair value of financial instruments that are not traded in an active market is determined by using valuation techniques. The Group uses its judgment to select a variety of methods and make assumptions that are mainly based on market conditions existing at the end of each reporting period (Note 37).

3.4 Net Defined Benefit Liability

The present value of net defined benefit liability depends on a number of factors that are determined on an actuarial basis using a number of assumptions including the discount rate (Note 17).

3.5 Amortization of Contract Assets, Contract Liabilities and Contract Cost Assets

Contract assets, contract liabilities and contract cost assets recognized under the application of IFRS 15 are amortized over the expected periods of customer relationships. The estimate of the expected terms of customer relationship is based on the historical data. If management’s estimate changes, it may cause significant differences in the timing of revenue recognition and amounts recognized.

3.6 Critical Judgments in Determining the Lease Term

In determining the lease term, management considers all facts and circumstances that create an economic incentive to exercise an extension option, or not exercise a termination option. Extension options (or periods after termination options) are only included in the lease term if the lease is reasonably certain to be extended (or not terminated).

For leases of property, machinery, and communication line facilities, the following factors are normally the most relevant:

• If there are significant penalties to terminate (or not extend), the Group is typically reasonably certain to extend (or not terminate).

• If any leasehold improvements are expected to have a significant remaining value, the Group is typically reasonably certain to extend (or not terminate).

• Otherwise, the Group considers other factors including historical lease durations and the costs and business disruption required to replace the leased asset.

Most extension options in offices, retail stores and vehicles leases have not been included in the lease liability, because the Group can replace the assets without significant cost or business disruption.

The lease term is reassessed if an option is actually exercised (or not exercised) or the Group becomes obliged to exercise (or not exercise) it. The assessment of reasonable certainty is only revised if a significant event or a significant change in circumstances occurs, which affects this assessment, and that is within the control of the lessee.

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Financial Instruments by Category

12 Months Ended

Dec. 31, 2023

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Financial Instruments by Category

4. Financial Instruments by Category

(1) Financial instruments by category as of December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	December 31, 2022
Financial assets	Financial assets at amortized cost		Financial assets at fair value through profit or loss		Financial assets at fair value through other comprehensive income		Derivatives used for hedging		Total
Cash and cash equivalents	￦	2,449,062	￦	—	￦	—	￦	—	￦	2,449,062
Trade and other receivables		7,459,994		—		129,124		—		7,589,118
Other financial assets		1,060,058		1,064,856		1,508,192		190,830		3,823,936

(in millions of Korean won)	December 31, 2022
Financial liabilities	Financial liabilities at amortized cost		Financial liabilities at fair value through profit and loss		Derivatives used for hedging		Others		Total
Trade and other payables1	￦	8,397,264	￦	—	￦	—	￦	—	￦	8,397,264
Borrowings		10,006,685		—		—		—		10,006,685
Other financial liabilities		246,606		141,280		33,555		—		421,441
Lease liabilities		—		—		—		1,172,038		1,172,038

1 Amounts related to employee benefit plans are included in Trade and other payables.

(in millions of Korean won)	December 31, 2023
Financial assets	Financial assets at amortized cost		Financial assets at fair value through profit or loss		Financial assets at fair value through other comprehensive income		Derivatives used for hedging		Total
Cash and cash equivalents	￦	2,879,554	￦	—	￦	—	￦	—	￦	2,879,554
Trade and other receivables		8,458,259		—		116,198		—		8,574,457
Other financial assets		1,385,921		939,661		1,680,168		159,211		4,164,961

(in millions of Korean won)	December 31, 2023
Financial liabilities	Financial liabilities at amortized cost		Financial liabilities at fair value through profit and loss		Derivatives used for hedging		Others		Total
Trade and other payables	￦	8,317,822	￦	—	￦	—	￦	—	￦	8,317,822
Borrowings		10,218,165		—		—		—		10,218,165
Other financial liabilities		915,185		136,106		24,547		—		1,075,838
Lease liabilities		—		—		—		1,179,909		1,179,909

(2) Gains or losses arising from financial instruments by category for the years ended December 31, 2021, 2022 and 2023, are as follows:

(in millions of Korean won)	2021			2022			2023
Financial assets at amortized cost
Interest income1	￦	74,937		￦	144,505		￦	360,134
Gain on foreign currency transactions4		12,826			23,824			22,782
Gain (loss) on foreign currency translation		2,911			(2,151	)		5,741
Gain (loss) on disposal		35			(81	)		(3,409	)
Loss on valuation		(110,286	)		(132,102	)		(172,966	)
Financial assets at fair value through profit or loss
Interest income1		3,673			6,008			13,480
Dividend income5		21,499			4,600			6,918
Gain (loss) on valuation6		64,659			(29,282	)		(31,965	)
Gain on disposal		29,974			2,347			14,237
Gain on foreign currency transactions4		—			1,100			—
Gain on foreign currency translation		17,794			13,711			3,396
Financial assets at fair value through other comprehensive income
Interest income1		222,290			190,281			18,966
Dividend income5		1,365			9,522			52,813
Loss on valuation		—			(61	)		—
Loss on disposal		(22,712	)		(62,183	)		(11,193	)
Other comprehensive income (loss) for the year2		129,780			(158,574	)		121,805
Derivatives used for hedging
Gain on transactions		—			27,628			10,192
Gain on valuation7		203,961			150,699			34,092
Other comprehensive income for the year2		144,967			88,048			7,772

(in millions of Korean won)	2021			2022			2023
Reclassified to profit or loss from other comprehensive gain (loss) for the year2,3		(143,305	)		(110,616	)		(29,178	)
Financial liabilities at amortized cost
Interest expense1		(232,197	)		(275,302	)		(358,486	)
Gain on valuation8		—			—			3,411
Loss on foreign currency transactions4		(3,580	)		(34,574	)		(24,054	)
Loss on foreign currency translation		(201,623	)		(168,577	)		(93,004	)
Financial liabilities at fair value through profit or loss
Gain (loss) on valuation		42,447			30,031			(7,394	)
Gain on disposal Interest expense1		2,136 —			—  (4,046	)		4,788 (44	)
Gain (loss) on foreign currency transactions4		(2	)		24			(5	)
Derivatives used for hedging
Loss on transactions		(6,208	)		(1,291	)		—
Gain (loss) on valuation		(7,206	)		(17,237	)		11,503
Other comprehensive income (loss) for the year2		(3,112	)		(23,957	)		7,557
Reclassified to profit or loss from other comprehensive income for the year2,3		6,722			15,195			(8,764	)
Lease liabilities
Interest expense1		(36,650	)		(41,469	)		(52,035	)
Total	￦	215,095		￦	(353,980	)	￦	(92,910	)

1 BC Card Co., Ltd., etc., subsidiaries of the Group, recognized interest income and expenses as operating revenue and expenses, respectively. Related interest income recognized as operating revenue is ￦112,973 million (2021: ￦27,440 million, 2022: ￦68,869 million) and related interest expense recognized as operating expense is ￦55,677 million (2021: ￦5,458 million, 2022: ￦27,060 million) for the year ended December 31, 2023.

2 The amounts directly reflected in equity after adjustments of deferred income tax.

3 During the years ended December 31, 2022 and 2023, certain derivatives of the Group were settled and the related gain or loss on valuation of cash flow hedge in other comprehensive income was reclassified to profit or loss for the year.

4 BC Card Co., Ltd., a subsidiary of the Group, recognized foreign currency transaction gain and loss and as operating revenue and expense. In relation to this, foreign currency transaction gain and loss recognized as operating revenue and expense amount to foreign exchange gain ￦5,597 million (2021 foreign exchange gain and loss: ￦2,373, 2022 foreign exchange gain and loss: ￦3,569 million), respectively, for the year ended December 31, 2023.

5 BC Card Co., Ltd., a subsidiary of the Group, recognized dividend income as operating revenue. Related dividend income recognized as operating revenue is ￦1,759 million (2021: ￦1,340 million, 2022: ￦2,299 million) for the year ended December 31, 2023.

6 KT Investment Co., Ltd., etc., subsidiaries of the Group, recognized gain and loss on valuation of financial instruments measured at fair value through profit or loss as operating income and expenses. In relation to this, valuation gain and loss recognized as operating revenue and expense amount to valuation loss ￦11,112 million (2021 valuation loss: ￦15,459 million, 2022 valuation loss: ￦7,860 million), for the year ended December 31, 2023.

7 BC Card Co., Ltd., a subsidiary of the Group, recognized gain and loss on valuation of derivatives as operating income and expenses. Related valuation gain recognized as operating revenue and expense is ￦48 million (2022 valuation loss: ￦418 million), for the year ended December 31, 2023.

8 KT Cloud Co., Ltd., a subsidiary of the Group, recognized gain on valuation as convertible preferred stock of ￦311,312 million for the year ended December 31, 2023.

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Cash and Cash Equivalents

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Cash and Cash Equivalents

5 Cash and Cash Equivalents

Restricted cash and cash equivalents as of December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	December 31, 2022	December 31, 2023	Description
Bank deposits	￦29,874	￦49,555	Deposit restricted for government project and others

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Trade and Other Receivables

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Trade and Other Receivables

6 Trade and Other Receivables

(1) Trade and other receivables as of December 31, 2022 and 2023, are as follows:

	December 31, 2022
(in millions of Korean won)	Total amounts		Provision for impairment			Present value discount			Carrying amount
Current assets
Trade receivables	￦	3,439,542	￦	(342,539	)	￦	(6,926	)	￦	3,090,077
Other receivables		3,092,261		(82,243	)		(2,023	)		3,007,995
Total	￦	6,531,803	￦	(424,782	)	￦	(8,949	)	￦	6,098,072
Non-current assets
Trade receivables	￦	408,098	￦	(1,199	)	￦	(11,540	)	￦	395,359
Other receivables		1,249,096		(136,300	)		(17,109	)		1,095,687
Total	￦	1,657,194	￦	(137,499	)	￦	(28,649	)	￦	1,491,046

	December 31, 2023
(in millions of Korean won)	Total amounts		Provision for impairment			Present value discount			Carrying amount
Current assets
Trade receivables	￦	3,596,899	￦	(330,002	)	￦	(9,165	)	￦	3,257,732
Other receivables		3,990,900		(76,089	)		(2,254	)		3,912,557
Total	￦	7,587,799	￦	(406,091	)	￦	(11,419	)	￦	7,170,289
Non-current assets
Trade receivables	￦	318,429	￦	(1,288	)	￦	(19,476	)	￦	297,665
Other receivables		1,227,929		(107,547	)		(13,879	)		1,106,503
Total	￦	1,546,358	￦	(108,835	)	￦	(33,355	)	￦	1,404,168

(2) The fair values of trade and other receivables with original maturities less than one year are equal to their carrying amounts because the discounting effect is immaterial. The fair value of trade and other receivables with original maturities longer than one year, which are mainly from sales of goods, is determined by discounting the expected future cash flow at the weighted average interest rate.

(3) Details of changes in provision for impairment for the years ended December 31, 2022 and 2023, are as follows:

	2022						2023
(in millions of Korean won)	Trade receivables			Other receivables			Trade receivables			Other receivables
Beginning balance	￦	349,725		￦	201,387		￦	343,738		￦	218,543
Provision		64,522			65,941			69,972			114,501
Reversal		—			(850	)		—			(14,941	)
Write-off/transfer		(69,430	)		(49,904	)		(69,246	)		(129,108	)
Acquisition and disposition of businesses		(43	)		—			(310	)		(17	)
Others		(1,036	)		1,969			(12,864	)		(5,342	)
Ending balance	￦	343,738		￦	218,543		￦	331,290		￦	183,636

Provisions for impairment on trade and other receivables are recognized as operating expenses and finance costs.

(4) Details of other receivables as of December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	December 31, 2022			December 31, 2023
Loans	￦	98,953		￦	51,854
Receivables1		2,668,545			3,539,742
Accrued income		32,218			43,920
Refundable deposits		339,450			299,935
Loans receivable		1,013,428			1,067,005
Finance lease receivables		105,690			141,883
Others		63,941			58,357
Less: Provision for impairment		(218,543	)		(183,636	)
	￦	4,103,682		￦	5,019,060

1 As of December 31, 2023, credit sales asset of ￦2,696,505 million (December 31, 2022: ￦1,960,579 million) held by BC Card Co., Ltd. are included.

(5) The maximum exposure of trade and other receivables to credit risk is the carrying amount of each class of receivables mentioned above as of December 31, 2023.

(6) For trade receivables that meet certain criteria, the Group sells those on a periodic basis to an Special Purpose Company(SPC) and records them at financial assets as fair value through other comprehensive income considering the trade receivables business model for managing the asset and the cash flow characteristics of the contract.

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Other Financial Assets and Liabilities

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Other Financial Assets and Liabilities

7 Other Financial Assets and Liabilities

(1) Details of other financial assets and liabilities as of December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	December 31, 2022			December 31, 2023
Other financial assets
Financial assets at amortized cost1	￦	1,060,058		￦	1,385,921
Financial assets at fair value through profit or loss1,2		1,064,856			939,661
Financial assets at fair value through other comprehensive income		1,508,192			1,680,168
Derivatives used for hedging		190,830			159,211
Less: Non-current		(2,501,484	)		(2,724,761	)
Current	￦	1,322,452		￦	1,440,200
Other financial liabilities
Financial liabilities at amortized cost3	￦	246,606		￦	915,185
Financial liabilities at fair value through profit or loss		141,280			136,106
Derivatives used for hedging		33,555			24,547
Less: Non-current		(412,650	)		(753,739	)
Current	￦	8,791		￦	322,099

1 As of December 31, 2023, the Group’s other financial assets amounting to ￦98,309 million (December 31, 2022: ￦102,215 million), which consist of checking account deposits, time deposits and others, are subject to withdrawal restrictions.

2 As of December 31, 2023, the Group provided investments in Korea Software Financial Cooperative amounting to ￦9,016 million as a collateral for the payment guarantee provided by the Cooperative.

3 The amount includes liabilities related to the obligation to acquire additional shares in Epsilon Global Communications Pte. Ltd. and MILLIE Co., Ltd and KT Cloud Co., Ltd. (Note 19).

(2) Financial Assets at fair value through profit or loss

1) Details of financial assets at fair value through profit or loss as of December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	December 31, 2022			December 31, 2023
Equity Instruments (Listed)	￦	26,647		￦	13,911
Equity Instruments (Unlisted)		72,517			42,185
Debt securities		942,274			880,549
Derivatives held for trading1		23,418			3,016
Total		1,064,856			939,661
Less: non-current		(609,887	)		(782,143	)
Current	￦	454,969		￦	157,518

1 According to a derivative arrangement with LS Marine Solution Co., Ltd. (formerly KT Submarine Co., Ltd.), derivative assets amounting to ￦1,015 million is included as of December 31, 2023. (Note 19).

2) The maximum exposure of debt instruments of financial assets recognized at fair value through profit or loss to credit risk is the carrying amount as of December 31, 2023.

(3) Financial Assets at fair value through other comprehensive income

1) Details of financial assets at fair value through other comprehensive income as of December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	December 31, 2022			December 31, 2023
Equity Instruments (Listed)	￦	1,006,476		￦	1,231,188
Equity Instruments (Unlisted)		496,284			443,067
Debt securities		5,432			5,913
Total		1,508,192			1,680,168
Less: non-current		(1,508,192	)		(1,680,168	)
Current	￦	—		￦	—

2) Upon disposal of these equity investments, any balance within the accumulated other comprehensive income for these equity investments is not classified to profit or loss, but to retained earnings. Upon disposal of these debt investments, the remaining balance of the accumulated other comprehensive income of debt investments is reclassified to profit or loss.

(4) Derivatives used for hedging

1) Details of valuation of derivatives used for hedging as of December 31, 2022 and 2023, are as follows:

	December 31, 2022						December 31, 2023
(in millions of Korean won)	Assets			Liabilities			Assets			Liabilities
Interest rate swap	￦	4,236		￦	—		￦	1,530		￦	191
Currency swap1		186,594			33,555			157,681			24,356
Total		190,830			33,555			159,211			24,547
Less: non-current		(147,141	)		(33,555	)		(107,802	)		(23,696	)
Current	￦	43,689		￦	—		￦	51,409		￦	851

1 The currency swap contract is to hedge the risk of variability in cash flow from the borrowings due to changes in interest rate and foreign exchange rate and the expected maximum period for the Group to be exposed to risks of cash flow fluctuation by hedged items is until September 7, 2034.

The entire fair value of a hedging derivative is classified as a non-current asset or liability if the remaining maturity of the hedged item is more than 12 months and, as a current asset or liability, if the maturity of the hedged item is less than 12 months.

2) The valuation gains and losses on the derivatives contracts for the years ended December 31, 2021, 2022 and 2023, are as follows:

(in millions of Korean won)	2021						2022						2023
Type of Transaction	Valuation gain		Valuation loss		Other comprehensive income1		Valuation gain		Valuation loss		Other comprehensive income1		Valuation gain		Valuation Loss		Other comprehensive income1
Interest rate swap	￦	—	￦	—	￦	1	￦	63	￦	490	￦	4,666	￦	48	￦	—	￦	(2,945	)
Currency swap		203,961		7,206		191,569		154,611		20,723		79,781		45,709		162		(27,273	)
Currency forwards		—		—		—		—		—		754		—		—		—
Total	￦	203,961	￦	7,206	￦	191,570	￦	154,674	￦	21,213	￦	85,201	￦	45,757	￦	162	￦	(30,218	)

1 The amounts directly reflected in equity are before adjustments of deferred income tax and allocation to the non-controlling interest.

3) The ineffective portion recognized in profit or loss on the cash flow hedges are valuation loss of ￦41 million for the year ended December 31, 2023 (2021: valuation gain of ￦11,825 million, 2022: valuation gain of ￦2,707 million).

4) The unsettled amount of derivative instruments for the years ended December 31, 2022 and 2023, are as follows:

(i) Hedging instruments

(in millions of Korean won and thousands of foreign currencies)	2022
					Book value of hedging instruments				Changes in fair value to calculate the ineffective portion of hedges
Currency	Foreign currency		Contract amount		Assets		Liabilities
USD		2,111,509	￦	2,527,626	￦	160,243	￦	32,936	￦	170,856
JPY		400,000		4,357		—		409		(308	)
SGD		284,000		245,208		26,351		—		20,511
EUR		7,700		10,283		—		210		129
KRW		—		170,000		4,236		—		4,717
Total			￦	2,957,474	￦	190,830	￦	33,555	￦	195,905

(in millions of Korean won and thousands of foreign currencies)	2023
					Book value of hedging instruments				Changes in fair value to calculate the ineffective portion of hedges
Currency	Foreign currency		Contract amount		Assets		Liabilities
USD		2,011,509	￦	2,417,473	￦	157,681	￦	23,465	￦	44,413
JPY		400,000		4,357		—		660		(162	)
EUR		7,700		10,283		—		231		381
KRW		—		240,000		1,530		191		707
Total		—	￦	2,672,113	￦	159,211	￦	24,547	￦	45,339

(ii) Hedged item

(in millions of Korean won)
	2022								2023
Currency	Book value of hedged items		Changes in fair value to calculate the ineffective portion of hedges			Cash flow hedge reserves1			Book value of hedged items		Changes in fair value to calculate the ineffective portion of hedges			Cash flow hedge reserves1
USD	￦	2,675,885	￦	(170,010	)	￦	(13,947	)	￦	2,593,707	￦	(44,365	)	￦	(30,415	)
JPY		3,813		308			116			3,651		162			49
SGD		267,843		(18,720	)		3,406			—		—			—
EUR		10,404		(121	)		582			10,985		(581	)		158
KRW		101,035		(4,655	)		4,385			239,944		(596	)		1,315
Total	￦	3,058,980	￦	(193,198	)	￦	(5,458	)	￦	2,848,287	￦	(45,380	)	￦	(28,893	)

1 The amount is after the deferred tax directly added or subtracted to the capital is reflected.

(5) Financial Liabilities at fair value through profit or loss

1) Details of financial liabilities at fair value through profit or loss as of December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	December 31, 2022		December 31, 2023
Derivatives held for trading 1,2	￦	141,280	￦	136,106

1 In relation to the additional acquisition of shares of the equity method investee K Bank Inc in 2021, the Group has entered into a shareholder agreement with the shareholders of K Bank Inc. According to the shareholder agreement, if K Bank Inc fails to be listed on the terms agreed in the shareholder agreement, the shareholders of K Bank Inc may exercise their Drag-Along right to the Group and require the Group to sell all the shares owned by such shareholders in K Bank to third parties based on the guaranteed return agreed in the shareholder agreement. The shareholder agreement also includes a call option where, if the shareholders exercise their Drag-Along rights, the Group has an option to purchase the shares held by those shareholders. As of December 31, 2023, the derivative financial liability in accordance with IFRS 9 associated with the rights prescribed in the shareholders agreement was ￦133,293 million(￦134,881 million as of December 31 2022).

2 The amount includes derivatives separated from convertible bonds issued by the Group (Note 15).

2) The valuation gain and loss on financial liabilities at fair value through profit or loss for the years ended December 31, 2021, 2022 and 2023, are as follows:

2021

2022

2023

(in millions of Korean won)

Valuation gain

Valuation loss

Valuation gain

Valuation loss

Valuation gain

Valuation loss

Derivatives liabilities held for trading

￦

51,187

￦

8,741

￦

24,683

￦

1,800

￦

3,316

￦

10,710

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Inventories

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Inventories

8. Inventories

Inventories as at December 31, 2022 and 2023, are as follows:

	December 31, 2022							December 31, 2023
(in millions of Korean won)	Acquisition cost		Valuation allowance			Book amount		Acquisition cost		Valuation Allowance			Book amount
Merchandise	￦	768,748	￦	(96,010	)	￦	672,738	￦	981,127	￦	(102,215	)	￦	878,912
Others		44,935		—			44,935		109,439		—			109,439
Total	￦	813,683	￦	(96,010	)	￦	717,673	￦	1,090,566	￦	(102,215	)	￦	988,351

Cost of inventories recognized as expenses for the year ended December 31, 2023 amounts to ￦3,386,069 million (2021: ￦3,787,203 million, 2022: ￦3,485,288 million) and valuation loss on inventory amounts to ￦6,205 million for the year ended December 31, 2023 (2021: reversal valuation loss on inventory amounts to ￦12,920 million, 2022: reversal valuation loss on inventory amounts to ￦24,294 million).

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Other Assets and Liabilities

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Other Assets and Liabilities

9. Other Assets and Liabilities

Other assets and liabilities as at December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	December 31, 2022			December 31, 2023
Other assets
Advance payments	￦	181,150		￦	217,997
Prepaid expenses		107,775			146,628
Contract cost		1,817,678			1,727,468
Contract assets		802,253			832,520
Others		12,964			15,237
Less: Non-current		(820,608	)		(827,297	)
Current	￦	2,101,212		￦	2,112,553
Other liabilities
Advances received1	￦	387,986		￦	682,880
Withholdings		155,017			159,080
Unearned revenue1		46,493			27,392
Lease liabilities		1,172,038			1,179,909
Contract liabilities		284,107			278,749
Others		33,108			30,848
Less: Non-current		(945,731	)		(950,015	)
Current	￦	1,133,018		￦	1,408,843

1 The amounts include adjustments arising from adoption of IFRS 15 Revenue from Contracts with Customers (Note 25).

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Property and Equipment

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Property and Equipment

10 Property and Equipment

(1) Changes in property and equipment for the years ended December 31, 2022 and 2023, are as follows:

	2022
(in millions of Korean won)	Land			Buildings and structures			Machinery and equipment			Others			Construction- in-progress			Total
Acquisition cost	￦	1,315,929		￦	4,707,250		￦	40,270,005		￦	1,607,853		￦	1,094,479		￦	48,995,516
Less: Accumulated depreciation (including accumulated impairment loss and others)		(132	)		(2,189,828	)		(30,953,434	)		(1,386,615	)		(621	)		(34,530,630	)
Beginning, net		1,315,797			2,517,422			9,316,571			221,238			1,093,858			14,464,886
Acquisition and capital expenditure		11,392			32,030			129,754			67,921			3,105,283			3,346,380
Disposal and termination		(2,556	)		(4,338	)		(76,608	)		(4,695	)		(3,926	)		(92,123	)
Depreciation		—			(147,620	)		(2,413,191	)		(79,376	)		—			(2,640,187	)
Impairment		—			—			(6,084	)		(7,825	)		(2,247	)		(16,156	)
Transfer in (out)1		24,647			230,955			2,660,753			31,036			(3,010,193	)		(62,802	)
Transfer from (to) investment properties		(63,278	)		(140,229	)		—			—			(2,676	)		(206,183	)
Acquisition and disposition of businesses		—			—			(4,386	)		(481	)		(3,720	)		(8,587	)
Others		(13,194	)		66,341			7,020			(4,382	)		(68,834	)		(13,049	)
Ending, net	￦	1,272,808		￦	2,554,561		￦	9,613,829		￦	223,436		￦	1,107,545		￦	14,772,179
Acquisition cost	￦	1,272,940		￦	4,830,853		￦	42,091,573		￦	1,276,779		￦	1,108,043		￦	50,580,188
Less: Accumulated depreciation (including accumulated impairment loss and others)		(132	)		(2,276,292	)		(32,477,744	)		(1,053,343	)		(498	)		(35,808,009	)

1 The amounts include the transferred amount to Intangible Assets account.

	2023
(in millions of Korean won)	Land			Buildings and structures			Machinery and equipment			Others			Construction- in-progress			Total
Acquisition cost	￦	1,272,940		￦	4,830,853		￦	42,091,573		￦	1,276,779		￦	1,108,043		￦	50,580,188
Less: Accumulated depreciation (including accumulated impairment loss and others)		(132	)		(2,276,292	)		(32,477,744	)		(1,053,343	)		(498	)		(35,808,009	)
Beginning, net		1,272,808			2,554,561			9,613,829			223,436			1,107,545			14,772,179
Acquisition and capital expenditure		844			5,072			75,412			78,400			3,029,380			3,189,108
Disposal and termination		(3,651	)		(5,012	)		(70,418	)		(1,711	)		(327	)		(81,119	)
Depreciation		—			(148,981	)		(2,495,402	)		(75,900	)		—			(2,720,283	)
Impairment		—			—			(6,577	)		(1	)		(1,294	)		(7,872	)
Transfer in (out)1		58,790			151,157			2,706,444			16,407			(3,092,670	)		(159,872	)
Transfer from (to) investment properties		(37,725	)		(88,336	)		—			—			(189	)		(126,250	)
Acquisition and disposition of businesses		18,761			49,532			(14,981	)		(44,543	)		(3,205	)		5,564
Others		14,549			137			(1,628	)		(7,742	)		(4,692	)		624
Ending, net	￦	1,324,376		￦	2,518,130		￦	9,806,679		￦	188,346		￦	1,034,548		￦	14,872,079
Acquisition cost	￦	1,324,508		￦	4,903,073		￦	43,611,280		￦	1,182,144		￦	1,035,198		￦	52,056,203
Less: Accumulated depreciation (including accumulated impairment loss and others)		(132	)		(2,384,943	)		(33,804,601	)		(993,798	)		(650	)		(37,184,124	)

1 The amounts include the transferred amount to Intangible Assets account.

(2) Details of property and equipment and investment properties provided as collateral as of December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	December 31, 2022
	Carrying amount		Secured amount		Related line item		Related amount		Secured party
Land and Buildings	￦	13,899	￦	19,100		Borrowings	￦	6,000		Industrial Bank of Korea, etc.
Land and Buildings	￦	460,166	￦	61,733		Deposits	￦	52,662		Lessee
(in millions of Korean won)	December 31, 2023
	Carrying amount		Secured amount		Related line item		Related amount		Secured party
Land and Buildings	￦	81,057	￦	64,680		Borrowings	￦	54,900		Industrial Bank of Korea, etc.
Land and Buildings	￦	555,921	￦	64,877		Deposits	￦	55,965		Lessee

(3) The borrowing costs capitalized for qualifying assets amount to ￦17,671 million (2021: ￦5,360 million, 2022: ￦9,954 million), for the year ended December 31, 2023. The range of interest rate applied to calculate the capitalized borrowing costs, for the year ended December 31, 2023, is 1.86%~7.28% (2021: 1.85% ~ 2.45%, 2022: 1.85%~7.42%).

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Investment Properties

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Investment Properties

11. Investment Properties

(1) Changes in investment properties for the years ended December 31, 2022 and 2023, are as follows:

	2022
(in millions of Korean won)	Land			Buildings			Construction- in-progress			Total
Acquisition cost	￦	815,331		￦	1,424,066		￦	66,801		￦	2,306,198
Less: Accumulated depreciation		(1,568	)		(583,976	)		—			(585,544	)
Beginning, net		813,763			840,090			66,801			1,720,654
Acquisition		14,569			17,351			55,478			87,398
Disposal and termination		(14,725	)		(5,858	)		(17	)		(20,600	)
Depreciation		—			(47,004	)		—			(47,004	)
Transfer from(to) property and equipment		63,278			140,229			2,676			206,183
Transfer and others		2,907			(28,350	)		12,170			(13,273	)
Ending, net	￦	879,792		￦	916,458		￦	137,108		￦	1,933,358
Acquisition cost	￦	881,360		￦	1,577,736		￦	137,108		￦	2,596,204
Less: Accumulated depreciation		(1,568	)		(661,278	)		—			(662,846	)

	2023
(in millions of Korean won)	Land			Buildings			Construction- in-progress			Total
Acquisition cost	￦	881,360		￦	1,577,736		￦	137,108		￦	2,596,204
Less: Accumulated depreciation		(1,568	)		(661,278	)		—			(662,846	)
Beginning, net		879,792			916,458			137,108			1,933,358
Acquisition		—			57,529			153,279			210,808
Disposal and termination		(8,167	)		(9,323	)		—			(17,490	)
Depreciation		—			(52,869	)		—			(52,869	)
Transfer from(to) property and equipment		37,725			88,336			189			126,250
Transfer and others		1			27,544			(29,467	)		(1,922	)
Ending, net	￦	909,351		￦	1,027,675		￦	261,109		￦	2,198,135
Acquisition cost	￦	910,919		￦	1,750,677		￦	261,109		￦	2,922,705
Less: Accumulated depreciation		(1,568	)		(723,002	)		—			(724,570	)

(2) The fair value of investment properties is ￦5,276,169 million as of December 31, 2023 (December 31, 2022: ￦5,370,047 million). The fair value of investment properties is estimated based on the expected cash flow.

(3) Rental income from investment properties is ￦224,016 million in 2023 (2021: ￦185,877 million, 2022: ￦206,127 million). The direct operating expenses (including repairs and maintenance) arising from investment properties that generated rental income during the period are recognized as operating expenses.

(4) As of December 31, 2023, the Group (Lessor) has entered into a non-cancellable operating lease contract relating to real estate lease. The future minimum lease fee under this contract is ￦101,738 million for one year or less, ￦130,707 million more than one year and less than five years, ￦18,817 million over five years, and ￦251,262 million in total.

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Intangible Assets

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Intangible Assets

12. Intangible Assets

(1) Changes in intangible assets for the years ended December 31, 2022 and 2023, are as follows:

	2022
(in millions of Korean won)	Goodwill			Development costs			Software			Frequency usage rights			Others			Total
Acquisition cost	￦	1,002,530		￦	1,812,377		￦	1,083,426		￦	2,617,647		￦	1,426,576		￦	7,942,556
Less: Accumulated amortization (including accumulated impairment loss and others)		(305,658	)		(1,584,004	)		(944,001	)		(778,516	)		(883,044	)		(4,495,223	)
Beginning, net	￦	696,872		￦	228,373		￦	139,425		￦	1,839,131		￦	543,532		￦	3,447,333
Acquisition and capital expenditure		19,455			45,997			55,651			—			225,886			346,989
Disposal and termination		—			(5,503	)		(48	)		—			(20,117	)		(25,668	)
Amortization		—			(93,374	)		(54,748	)		(350,265	)		(128,874	)		(627,261	)
Impairment		(24,006	)		(744	)		(508	)		—			(5,416	)		(30,674	)
Acquisition and disposition of businesses		—			(2,320	)		(802	)		—			(7,144	)		(10,266	)
Others		15,902			(573	)		16,106			(610	)		(1,445	)		29,380
Ending, net	￦	708,223		￦	171,856		￦	155,076		￦	1,488,256		￦	606,422		￦	3,129,833
Acquisition cost		1,037,887			1,803,687			1,156,951			2,617,707			1,532,061			8,148,293
Less: Accumulated amortization (including accumulated impairment loss and others)		(329,664	)		(1,631,831	)		(1,001,875	)		(1,129,451	)		(925,639	)		(5,018,460	)

	2023
(in millions of Korean won)	Goodwill			Development costs			Software			Frequency usage rights			Others			Total
Acquisition cost	￦	1,037,887		￦	1,803,687		￦	1,156,951		￦	2,617,707		￦	1,532,061		￦	8,148,293
Less: Accumulated amortization (including accumulated impairment loss and others)		(329,664	)		(1,631,831	)		(1,001,875	)		(1,129,451	)		(925,639	)		(5,018,460	)
Beginning, net		708,223			171,856			155,076			1,488,256			606,422			3,129,833
Acquisition and capital expenditure1		—			33,078			38,603			37			238,019			309,737
Disposal and termination		—			(4,812	)		(397	)		—			(6,431	)		(11,640	)
Amortization 2		—			(63,052	)		(52,265	)		(350,276	)		(226,316	)		(691,909	)
Impairment		(230,352	)		(128	)		(16	)		—			(5,711	)		(236,207	)
Acquisition and disposition of businesses		6,207			—			(108	)		—			(69	)		6,030
Others		4,349			1,658			11,769			175			10,066			28,017
Ending, net	￦	488,427		￦	138,600		￦	152,662		￦	1,138,192		￦	615,980		￦	2,533,861
Acquisition cost	￦	1,036,354		￦	1,790,446		￦	1,196,329		￦	2,415,243		￦	1,725,087		￦	8,163,459
Less: Accumulated amortization (including accumulated impairment loss and others)		(547,927	)		(1,651,846	)		(1,043,667	)		(1,277,051	)		(1,109,107	)		(5,629,598	)

1 The amounts include the transferred amount from Property and Equipment account.

2 Amounts include ￦52,179 million which is the changed effect of useful life from Media Contents asset.

(2) Goodwill, amounting to ￦ 212,910 million, is not subject to amortization as of December 31, 2023 (December 31, 2022: ￦ 210,114 million).

(3) Goodwill is allocated to the Group’s cash-generating unit which is identified by operating segments. As of December 31, 2023, goodwill allocated to each cash-generating unit is as follows:

(in millions of Korean won)
Cash generating Unit	Amount
Mobile services1,9	￦	65,057
BC Card Co., Ltd.2		41,234
HCN Co., Ltd. 3		130,242
GENIE Music Corporation 4		50,214
MILLIE Co., Ltd.5		54,725
PlayD Co., Ltd. 6		40,068
KT Telecop Co., Ltd. 7		15,418
Epsilon Global Communications Pte. Ltd. 8		45,670
KT MOS Bukbu Co., Ltd and others		45,799
Total	￦	488,427

1 The recoverable amounts of mobile services business are calculated based on value-in use calculations. These calculations use discounted cash flow projections for the next five years based on financial budgets. A terminal growth rate of 0.0% was applied for the cash flows expected to be incurred after five years. This growth rate does not exceed the average growth rate of the industry which the cash-generating unit belongs in. The Group estimated its revenue growth rate 0.56% based on past performance and its expectation of future market changes. In addition, management estimated the cash flow based on past performance and its expectation of market growth, and the discount rates 6.68% used reflected specific risks relating to the relevant CGU. As a result of the impairment test, the Group concluded that the carrying amount of CGU does not exceed the recoverable amount. Accordingly, the Group did not recognize an impairment loss on goodwill on mobile business for the years ended December 31, 2021, 2022 and 2023.

2 The recoverable amounts of BC Card Co., Ltd. are calculated based on value-in use calculations. These calculations use discounted cash flow projections for the next five years based on financial budgets. A terminal growth rate of 0.0% was applied for the cash flows expected to be incurred after five years. This growth rate does not exceed the average growth rate of the industry which the cash-generating unit belongs in. The Group estimated its revenue growth rate 0.04% based on past performance and its expectation of future market changes. In addition, management estimated the cash flow based on past performance and its expectation of market growth, and the discount rates 5.22% used reflected specific risks relating to the relevant CGU. As a result of the impairment test, the Group concluded that the carrying amount of CGU does not exceed the recoverable amount. Accordingly, the Group did not recognize an impairment loss on goodwill on BC Card Co., Ltd. for the years ended December 31, 2021, 2022 and 2023.

3 The recoverable amounts of HCN Co., Ltd. are calculated based on value-in use calculations. These calculations use discounted cash flow projections for the next five years based on financial budgets. A terminal growth rate of 0.0% was applied for the cash flows expected to be incurred after five years. This growth rate does not exceed the average growth rate of the industry which the cash-generating unit belongs in. The Group estimated its revenue growth rate 2.21% based on past performance and its expectation of future market changes. In addition, management estimated the cash flow based on past performance and its expectation of market growth, and the discount rates 11.37% used reflected specific risks relating to the relevant CGU. As a result of the impairment test, HCN’s recoverable amount was KRW 130,242 million, which was less than the carrying amount, and KRW 98,432 million of the impairment loss was recorded as goodwill in full and reflected in operating expenses.

4 The recoverable amounts of GENIE Music Corporation are calculated based on value-in use calculations. These calculations use discounted cash flow projections for the next five years based on financial budgets. A terminal growth rate of 0.0% was applied for the cash flows expected to be incurred after five years. This growth rate does not exceed the average growth rate of the industry which the cash-generating unit belongs in. The Group estimated its revenue growth rate 4.51% based on past performance and its expectation of future market changes. In addition, management estimated the cash flow based on past performance and its expectation of market growth, and the discount rates 16.73% used reflected specific risks relating to the relevant CGU. As a result of the impairment test, the Group concluded that the carrying amount of CGU does not exceed the recoverable amount. Accordingly, the Group did not recognize an impairment loss on goodwill on GENIE Music Corporation for the years ended December 31, 2023.

5 The recoverable amounts of MILLIE Co., Ltd. are calculated based on value-in use calculations. These calculations use discounted cash flow projections for the next four years based on financial budgets. A terminal growth rate of 1.0% was applied for the cash flows expected to be incurred after four years. This growth rate does not exceed the average growth rate of the industry which the cash-generating unit belongs in. The Group estimated its revenue growth rate 9.96% based on past performance and its expectation of future market changes. In addition, management estimated the cash flow based on past performance and its expectation of market growth, and the discount rates 22.48% used reflected specific risks relating to the relevant CGU. As a result of the impairment test, the Group concluded that the carrying amount of CGU does not exceed the recoverable amount. Accordingly, the Group did not recognize an impairment loss on goodwill on MILLIE Co., Ltd. for the years ended December 31, 2023.

6 The recoverable amount of PlayD Co., Ltd is calculated based on fair value less cost to sell.

7 The recoverable amounts of KT Telecop Co., Ltd. are calculated based on value-in use calculations. These calculations use discounted cash flow projections for the next five years based on financial budgets. A terminal growth rate of 1.0% was applied for the cash flows expected to be incurred after five years. This growth rate does not exceed the average growth rate of the industry which the cash-generating unit belongs in. The Group estimated its revenue growth rate 3.54% based on past performance and its expectation of future market changes. In addition, management estimated the cash flow based on past performance and its expectation of market growth, and the discount rates 9.04% used reflected specific risks relating to the relevant CGUs. As a result of the impairment test, the Group concluded that the carrying amount of CGU does not exceed the recoverable amount. Accordingly, the Group did not recognize an impairment loss on goodwill on KT Telecop Co., Ltd. for the years ended December 31, 2021, 2022 and 2023.

8 The recoverable amounts of Epsilon Global Communications Pte. Ltd. are calculated based on value-in use calculations. These calculations use discounted cash flow projections for the next nine years based on financial budgets. A terminal growth rate of 1.0% was applied for the cash flows expected to be incurred after nine years. This growth rate does not exceed the average growth rate of the industry which the cash-generating unit belongs in. The Group estimated its revenue growth rate 10.57% based on past performance and its expectation of future market changes. In addition, management estimated the cash flow based on past performance and its expectation of market growth, and the discount rates 8.84% used reflected specific risks relating to the relevant CGU. As a result of the impairment test, Epsilon Global Communications’s recoverable amount was KRW 45,670 million, which was less than the carrying amount, and KRW 118,609 million of the impairment loss was recorded as goodwill in full and reflected in operating expenses.

9 The Group performed its impairment assessment for long-lived assets attributed to the Information and Communication Technology (“ICT”) reporting segment, which includes the Cash-Generating Units of Mobile, Fixed line, and Corporate Services (the “CGUs”). The Group compared the carrying value of each CGU to the estimated recoverable amount. The recoverable amounts of ICT reporting segment are calculated based on value-in use calculations. These calculations use discounted cash flow projections for the next five years based on financial budgets. A terminal growth rate of 0.0% was applied for the cash flows expected to be incurred after five years. This growth rate does not exceed the average growth rate of the industry which the cash-generating unit belongs in. The Group estimated its revenue growth rate 0.56% ~ 9.14% based on past performance and its expectation of future market changes. In addition, management estimated the cash flow based on past performance and its expectation of market growth, and the discount rate 6.68%. Accordingly, the Group did not recognize an impairment loss on ICT reporting segment for the years ended December 31, 2021, 2022 and 2023.

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Investments in Associates and Joint Ventures

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Investments in Associates and Joint Ventures

13. Investments in Associates and Joint Ventures

(1) Details of associates as of December 31, 2022 and 2023, are as follows:

	Percentage of ownership (%)						Location		Closing month
	December 31, 2022			December 31, 2023
KIF Investment Fund		33.3	%		33.3	%		Korea		December
K Bank Inc.		33.7	%		33.7	%		Korea		December
HD Hyundai Robotics Co., Ltd. (formerly Hyundai Robotics Co., Ltd.)1		10.0	%		10.0	%		Korea		December
Megazone Cloud Corporation1		6.8	%		6.8	%		Korea		December
IGIS No. 468-1 General Private Real Estate Investment Company		44.6	%		44.6	%		Korea		December
KT-DSC Creative Economy Youth Start-up Investment Fund		28.6	%		28.6	%		Korea		December
IGIS Professional Investors Private Investment Real Estate Investment LLCNo 395		35.3	%		35.3	%		Korea		December
LS Marine Solution Co., Ltd (formerly KT Submarine Co., Ltd.).1, 2		32.9	%		7.3	%		Korea		December

1 As of December 31, 2023, although the Group has less than 20% ownership in ordinary share, this entity is included in investments in associates as the Group has significant influence in determining the operational and financial policies.

2 As of December 31, 2023, due to the loss of control of an entity, it is now accounted as an associate.

(2) Changes in investments in associates and joint ventures for the years ended December 31, 2022 and 2023, are as follows:

	2022
(in millions of Korean won)	Beginning		Acquisition (Disposal)		Share of net profit (loss) from associates and joint ventures			Others			Ending
KIF Investment Fund	￦	178,935	￦	—	￦	2,502		￦	(10,458	)	￦	170,979
K Bank Inc.		831,737		—		29,010			(7,991	)		852,756
HD Hyundai Robotics Co., Ltd. (formerly Hyundai Robotics Co., Ltd.)		48,725		—		798			(151	)		49,372
Megazone Cloud Corporation		—		130,001		(22,555	)		28,753			136,199
IGIS No. 468-1 General Private Real Estate Investment Company		—		25,000		(1,411	)		—			23,589
KT-DSC Creative Economy Youth Start-up Investment Fund		22,138		—		(13	)		(2	)		22,123
IGIS Professional Investors Private Investment Real Estate Investment LLC No. 395		17,084		—		(464	)		—			16,620
Others		189,810		100,040		(24,688	)		(56,078	)		209,084
	￦	1,288,429	￦	255,041	￦	(16,821	)	￦	(45,927	)	￦	1,480,722

	2023
(in millions of Korean won)	Beginning		Acquisition (Disposal)			Share of net profit (loss) from associates and joint ventures1			Others			Ending
KIF Investment Fund	￦	170,979	￦	—		￦	5,443		￦	632		￦	177,054
K Bank Inc.		852,756		—			1,089			19,036			872,881
HD Hyundai Robotics Co., Ltd. (formerly Hyundai Robotics Co., Ltd.)		49,372		—			(1,637	)		(1	)		47,734
Megazone Cloud Corporation		136,199		—			(4,583	)		78			131,694
IGIS No. 468-1 General Private Real Estate Investment Company		23,589		—			(105	)		—			23,484
KT-DSC Creative Economy Youth Start-up Investment Fund		22,123		(500	)		3,494			—			25,117
IGIS Professional Investors Private Investment Real Estate Investment LLC No 395		16,620		—			(4,678	)		—			11,942
LS Marine Solution Co., Ltd (formerly KT Submarine Co., Ltd.)		—		—			255			23,237	1		23,492
Others		209,084		101,887			(34,912	)		(32,568	)		243,491
	￦	1,480,722	￦	101,387		￦	(35,634	)	￦	10,414		￦	1,556,889

1 The amount represents the fair value of investment at the time the Company lost control (Refer to note above).

(3) Summarized financial information of associates and joint ventures as at and for the years ended December 31, 2022 and 2023, is as follows:

(in millions of Korean won)	December 31, 2022
	Current assets		Non-current assets		Current liabilities		Non-current liabilities
KIF Investment Fund	￦	98,132	￦	414,804	￦	—	￦	—
K Bank Inc.		16,562,742		71,265		14,830,983		2,168
HD Hyundai Robotics Co., Ltd. (formerly Hyundai Robotics Co., Ltd.).		278,413		135,380		63,009		64,335
Megazone Cloud Corporation		857,089		202,767		330,619		94,202
IGIS No. 468-1 General Private Real Estate Investment Company		52,851		—		12		—
KT-DSC Creative Economy Youth Start-up Investment Fund		908		76,884		362		—
IGIS Professional Investors Private Investment Real Estate Investment LLC No. 395		9,344		127,321		90,545		—

(in millions of Korean won)	December 31, 2023
	Current assets		Non-current assets		Current liabilities		Non-current liabilities
KIF Investment Fund	￦	128,344	￦	402,819	￦	—	￦	—
K Bank Inc.		21,320,790		89,812		19,541,076		4,516
HD Hyundai Robotics Co., Ltd. (formerly Hyundai Robotics Co., Ltd.)		251,868		134,424		106,557		9,775
Megazone Cloud Corporation		874,778		267,605		341,679		205,087
IGIS No. 468-1 General Private Real Estate Investment Company		2,985		49,631		11		—
KT-DSC Creative Economy Youth Start-up Investment Fund		482		87,528		101		—
IGIS Professional Investors Private Investment Real Estate Investment LLC No 395		5,690		145,769		107,553		—
LS Marine Solution Co., Ltd. (formerly KT Submarine Co., Ltd.)		66,767		80,307		23,906		207

(in millions of Korean won)	2022
	Operating revenue		Profit (loss) for the year			Other comprehensive income (loss)			Total comprehensive income (loss)			Dividends received from associates
KIF Investment Fund	￦	19,916	￦	7,505		￦	(11,779	)	￦	(4,274	)	￦	6,531
K Bank Inc.		558,872		86,498			(24,888	)		61,610			—
HD Hyundai Robotics Co., Ltd. (formerly Hyundai Robotics Co., Ltd.).		181,944		9,332			(49	)		9,283			—
Megazone Cloud Corporation		1,261,228		(293,186	)		(6,609	)		(299,795	)		—
IGIS No. 468-1 General Private Real Estate Investment Company		9		(3,161	)		—			(3,161	)		—
KT-DSC Creative Economy Youth Start-up Investment Fund		19,931		(53	)		—			(53	)		—
IGIS Professional Investors Private Investment Real Estate Investment LLC No. 395		—		(474	)		—			(474	)		—

(in millions of Korean won)	2023
	Operating revenue		Profit (loss) for the year			Other comprehensive income (loss)			Total comprehensive income (loss)			Dividends received from associates
KIF Investment Fund	￦	33,017	￦	16,330		￦	—		￦	16,330		￦	1,139
K Bank Inc.		946,559		10,560			56,609			67,169			—
HD Hyundai Robotics Co., Ltd. (formerly Hyundai Robotics Co., Ltd.).		167,949		(17,513	)		(1,093	)		(18,606	)		—
Megazone Cloud Corporation		1,410,078		(34,760	)		(3,021	)		(37,781	)		—
IGIS No. 468-1 General Private Real Estate Investment Company		6		(234	)		—			(234	)		—
KT-DSC Creative Economy Youth Start-up Investment Fund		19,849		12,227			—			12,227			—
IGIS Professional Investors Private Investment Real Estate Investment LLC No 395		—		(406	)		—			(406	)		—
LS Marine Solution Co., Ltd (formerly KT Submarine Co., Ltd.)		70,779		11,618			(289	)		11,329			—

(4) Details of a reconciliation of the summarized financial information to the carrying amount of interests in the associates and joint ventures as at and for the years ended December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	2022
	Net assets (a)		Percentage of ownership (b)			Share in net assets (c)=(a)x(b)		Intercompany transaction and others (d)		Book amount (c)+(d)
KIF Investment Fund	￦	512,936		33.33	%	￦	170,979	￦	—	￦	170,979
K Bank Inc.		1,800,856		33.72	%		607,276		245,480		852,756
HD Hyundai Robotics Co., Ltd. (formerly Hyundai Robotics Co., Ltd.)		286,449		10.00	%		28,645		20,727		49,372
Megazone Cloud Corporation		635,035		6.83	%		43,360		92,839		136,199
IGIS No. 468-1 General Private Real Estate Investment Company		52,839		44.64	%		23,589		—		23,589
KT-DSC Creative Economy Youth Start-up Investment Fund		77,430		28.57	%		22,123		—		22,123
IGIS Professional Investors Private Investment Real Estate Investment LLC No. 395		46,120		35.29	%		16,278		342		16,620

(in millions of Korean won)	2023
	Net assets (a)		Percentage of ownership (b)			Share in net assets (c)=(a)x(b)		Intercompany transaction and others (d)			Book amount (c)+(d)
KIF Investment Fund	￦	531,164		33.33	%	￦	177,054	￦	—		￦	177,054
K Bank Inc.		1,865,010		33.72	%		628,910		243,971			872,881
HD Hyundai Robotics Co., Ltd. (formerly Hyundai Robotics Co., Ltd.)		269,960		10.00	%		26,996		20,738			47,734
Megazone Cloud Corporation		547,786		6.83	%		37,404		94,290			131,694
IGIS No. 468-1 General Private Real Estate Investment Company		52,605		44.64	%		23,484		—			23,484
KT-DSC Creative Economy Youth Start-up Investment Fund		87,908		28.57	%		25,117		—			25,117
IGIS Professional Investors Private Investment Real Estate Investment LLC No 395		43,905		35.29	%		15,496		(3,554	)		11,942
LS Marine Solution Co., Ltd (formerly KT Submarine Co., Ltd.)		122,961		7.30	%		8,972		14,520			23,492

(5) Due to discontinuance of equity method of accounting, the Group has not recognized loss from associates and joint ventures of ￦833 million for the year ended December 31, 2023 (2021: ￦717 million, 2022: ￦909 million). The unrecognized accumulated comprehensive loss of associates and joint ventures as of December 31, 2023 is ￦10,748 million (2022: ￦9,915 million).

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Trade and Other Payables

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Trade and Other Payables

14. Trade and Other Payables

(1) Details of trade and other payables as of December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	December 31, 2022		December 31, 2023
Current liabilities
Trade payables	￦	1,150,515	￦	1,297,752
Other payables		6,182,650		6,757,170
Total	￦	7,333,165	￦	8,054,922
Non-current liabilities
Trade payables	￦	—	￦	3,202
Other payables		1,064,099		816,356
Total	￦	1,064,099	￦	819,558

(2) Details of other payables as of December 31, 2022 and 2023 are as follows:

(in millions of Korean won)	December 31, 2022			December 31, 2023
Non-trade payables1	￦	4,981,300		￦	5,207,165
Accrued expenses		1,234,023			1,267,700
Operating deposits		818,603			880,810
Others		212,823			217,851
Less: non-current		(1,064,099	)		(816,356	)
Current	￦	6,182,650		￦	6,757,170

1 As of December 31, 2023, credit sale liabilities amounting to ￦2,314,077 million (December 31, 2022: ￦1,754,075 million) held by BC Card Co., Ltd. (a subsidiary of the Group) are included.

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Borrowings

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Borrowings

15. Borrowings

(1) Details of borrowings as of December 31, 2022 and 2023, are as follows:

1) Debentures

(in millions of Korean won and foreign currencies in thousands)				December 31, 2022				December 31, 2023
Type	Maturity		Annual interest rates	Foreign currency		Korean won		Foreign currency		Korean won
MTNP notes1		Sep. 7, 2034	6.500%		USD 100,000	￦	126,730		USD 100,000	￦	128,940
MTNP notes		Jul. 18, 2026	2.500%		USD 400,000		506,920		USD 400,000		515,760
MTNP notes		Aug. 23, 2023	—		USD 100,000		126,730		—		—
MTNP notes		Jul. 19, 2024	0.330%		JPY 400,000		3,813		JPY 400,000		3,651
MTNP notes		Sep. 1. 2025	1.000%		USD 400,000		506,920		USD 400,000		515,760
FR notes2		Nov. 1, 2024	Compounded SOFR+1.210%		USD 350,000		443,555		USD 350,000		451,290
FR notes		Jun. 19, 2023	—		SGD 284,000		267,843		—		—
MTNP notes		Jan. 21, 2027	1.375%		USD 300,000		380,190		USD 300,000		386,820
MTNP notes		Aug. 08, 2025	4.000%		USD 500,000		633,650		USD 500,000		644,700
The 183-3rd Public bond		Dec. 22, 2031	4.270%		—		160,000		—		160,000
The 184-2nd Public bond		Apr. 10, 2023	—		—		190,000		—		—
The 184-3rd Public bond		Apr. 10, 2033	3.170%		—		100,000		—		100,000
The 186-3rd Public bond		Jun. 26, 2024	3.418%		—		110,000		—		110,000
The 186-4th Public bond		Jun. 26, 2034	3.695%		—		100,000		—		100,000
The 187-3rd Public bond		Sep. 2, 2024	3.314%		—		170,000		—		170,000
The 187-4th Public bond		Sep. 2, 2034	3.546%		—		100,000		—		100,000
The 188-2nd Public bond		Jan. 29, 2025	2.454%		—		240,000		—		240,000
The 188-3rd Public bond		Jan. 29, 2035	2.706%		—		50,000		—		50,000
The 189-3rd Public bond		Jan. 28, 2026	2.203%		—		100,000		—		100,000
The 189-4th Public bond		Jan. 28, 2036	2.351%		—		70,000		—		70,000
The 190-2nd Public bond		Jan. 30, 2023	—		—		150,000		—		—
The 190-3rd Public bond		Jan. 30, 2028	2.947%		—		170,000		—		170,000
The 190-4th Public bond		Jan. 30, 2038	2.931%		—		70,000		—		70,000
The 191-2nd Public bond		Jan. 15, 2024	2.088%		—		80,000		—		80,000
The 191-3rd Public bond		Jan. 15, 2029	2.160%		—		110,000		—		110,000
The 191-4th Public bond		Jan. 14, 2039	2.213%		—		90,000		—		90,000
The 192-2nd Public bond		Oct. 11, 2024	1.578%		—		100,000		—		100,000
The 192-3rd Public bond		Oct. 11, 2029	1.622%		—		50,000		—		50,000
The 192-4th Public bond		Oct. 11, 2039	1.674%		—		110,000		—		110,000
The 193-1st Public bond		Jun. 16, 2023	—		—		150,000		—		—
The 193-2nd Public bond		Jun. 17, 2025	1.434%		—		70,000		—		70,000
The 193-3rd Public bond		Jun. 17, 2030	1.608%		—		20,000		—		20,000
The 193-4th Public bond		Jun. 15, 2040	1.713%		—		60,000		—		60,000

(in millions of Korean won and foreign currencies in thousands)				December 31, 2022				December 31, 2023
Type	Maturity		Annual interest rates	Foreign currency		Korean won		Foreign currency		Korean won
The 194-1st Public bond		Jan. 26, 2024	1.127%		—		130,000		—		130,000
The 194-2nd Public bond		Jan. 27, 2026	1.452%		—		140,000		—		140,000
The 194-3rd Public bond		Jan. 27, 2031	1.849%		—		50,000		—		50,000
The 194-4th Public bond		Jan. 25, 2041	1.976%		—		80,000		—		80,000
The 195-1st Public bond		Jun. 10, 2024	1.387%		—		180,000		—		180,000
The 195-2nd Public bond		Jun. 10, 2026	1.806%		—		80,000		—		80,000
The 195-3rd Public bond		Jun. 10, 2031	2.168%		—		40,000		—		40,000
The 196-1st Public bond		Jan. 27, 2025	2.596%		—		270,000		—		270,000
The 196-2nd Public bond		Jan. 27, 2027	2.637%		—		100,000		—		100,000
The 196-3rd Public bond		Jan. 27, 2032	2.741%		—		30,000		—		30,000
The 197-1st Public bond		Jun. 27, 2025	4.191%		—		280,000		—		280,000
The 197-2nd Public bond		Jun. 29, 2027	4.188%		—		120,000		—		120,000
The 198-1st Public bond		Jan. 10, 2025	3.847%		—		—		—		70,000
The 198-2nd Public bond		Jan. 12, 2026	3.869%		—		—		—		150,000
The 198-3rd Public bond		Jan. 12, 2028	3.971%		—		—		—		80,000
The 199-1st Public bond		Jul. 11, 2025	4.028%		—		—		—		85,000
The 199-2nd Public bond		Jul. 10, 2026	4.146%		—		—		—		160,000
The 199-3rd Public bond		Jul. 12, 2028	4.221%		—		—		—		155,000
The 18-1st unsecured bond		Jul. 2, 2024	1.844%		—		100,000		—		100,000
The 18-2nd unsecured bond		Jul. 2, 2026	2.224%		—		50,000		—		50,000
The 148th Won-denominated unsecured bond		Jun. 23, 2023	—		—		100,000		—		—
The 149-1st Won-denominated unsecured bond		Mar. 8, 2024	1.440%		—		70,000		—		70,000
The 149-2nd Won-denominated unsecured bond		Mar. 10, 2026	1.756%		—		30,000		—		30,000
The 150-1st Won-denominated unsecured bond		Apr. 7, 2023	—		—		20,000		—		—
The 150-2nd Won-denominated unsecured bond		Apr. 8, 2024	1.462%		—		30,000		—		30,000
The 151-1st Won-denominated unsecured bond		May 12, 2023	—		—		10,000		—		—
The 151-2nd Won-denominated unsecured bond		May 14, 2024	1.432%		—		40,000		—		40,000
The 152-1st Won-denominated unsecured bond		Aug. 30, 2024	1.813%		—		80,000		—		80,000
The 152-2nd Won-denominated unsecured bond		Aug. 28, 2026	1.982%		—		20,000		—		20,000
The 153-1st Won denominated unsecured bond		Nov. 10, 2023	—		—		30,000		—		—
The 153-2nd Won-denominated unsecured bond		Nov. 11, 2024	2.425%		—		70,000		—		70,000
The 154th Won-denominated unsecured bond		Jan. 23, 2025	2.511%		—		40,000		—		40,000
The 155-1st Won-denominated unsecured bond		Feb. 29, 2024	2.615%		—		50,000		—		50,000
The 155-2nd Won-denominated unsecured bond		Sep. 2, 2024	2.745%		—		20,000		—		20,000
The 155-3rd Won-denominated unsecured bond		Feb. 28, 2025	2.880%		—		20,000		—		20,000
The 156-1st Won-denominated unsecured bond3		Mar. 25, 2025	5Y CMS+0.404%		—		60,000		—		60,000

(in millions of Korean won and foreign currencies in thousands)				December 31, 2022					December 31, 2023
Type	Maturity		Annual interest rates	Foreign currency		Korean won			Foreign currency		Korean won
The 156-2nd Won-denominated unsecured bond3		Mar. 25, 2032	10Y CMS+0.965%		—		40,000			—		40,000
The 157-1st Won-denominated unsecured bond		Apr. 28, 2023	—		—		30,000			—		—
The 157-2nd Won-denominated unsecured bond		Oct. 27, 2023	—		—		30,000			—		—
The 158th Won-denominated unsecured bond		Jan. 27, 2025	4.421%		—		50,000			—		50,000
The 159-1st Won-denominated unsecured bond		Aug. 09, 2024	4.267%		—		30,000			—		30,000
The 159-2nd Won-denominated unsecured bond		Aug. 11, 2027	4.505%		—		30,000			—		30,000
The 160-1st Won-denominated unsecured bond		Jun. 14, 2024	5.615%		—		20,000			—		20,000
The 160-2nd Won-denominated unsecured bond		Dec. 13, 2024	5.667%		—		20,000			—		20,000
The 160-3rd Won-denominated unsecured bond		Dec. 12, 2025	5.769%		—		30,000			—		30,000
The 161-1st Won-denominated unsecured bond		Jun. 21, 2024	5.527%		—		10,000			—		10,000
The 161-2nd Won-denominated unsecured bond		Dec. 20, 2024	5.557%		—		20,000			—		20,000
The 161-3rd Won-denominated unsecured bond		Jun. 20, 2025	5.594%		—		30,000			—		30,000
The 161-4th Won-denominated unsecured bond		Dec. 22, 2025	5.615%		—		10,000			—		10,000
The 162-1st Won-denominated unsecured bond		Dec. 27, 2023	—		—		50,000			—		—
The 162-2nd Won-denominated unsecured bond		Jan. 26, 2024	5.069%		—		40,000			—		40,000
The 162-3rd Won-denominated unsecured bond		Apr. 26, 2024	5.080%		—		10,000			—		10,000
The 163-1st Won-denominated unsecured bond		Feb. 20, 2026	4.059%		—		—			—		20,000
The 163-2nd Won-denominated unsecured bond		Feb. 22, 2028	4.311%		—		—			—		80,000
The 164-1st Won-denominated unsecured bond		Apr. 12, 2024	3.778%		—		—			—		10,000
The 164-2nd Won-denominated unsecured bond		Oct. 24, 2024	3.821%		—		—			—		30,000
The 164-3rd Won-denominated unsecured bond		Apr. 14, 2028	4.220%		—		—			—		30,000
The 165-1st Won-denominated unsecured bond		May. 09, 2025	3.870%		—		—			—		30,000
The 165-2nd Won-denominated unsecured bond		Nov. 09, 2026	3.932%		—		—			—		10,000
The 165-3rd Won-denominated unsecured bond		May. 07, 2027	3.972%		—		—			—		30,000
The 166-1st Won-denominated unsecured bond		Nov. 22. 2024	4.205%		—		—			—		20,000
The 166-2nd Won-denominated unsecured bond		Apr. 22. 2025	4.310%		—		—			—		40,000
The 166-3rd Won-denominated unsecured bond		May. 21. 2025	4.332%		—		—			—		10,000
The 166-4th Won-denominated unsecured bond		May. 22. 2025	4.332%		—		—			—		40,000
The 167-1st Won-denominated unsecured bond		Dec. 20. 2024	3.865%		—		—			—		30,000
The 167-2nd Won-denominated unsecured bond		Jan. 22. 2025	3.864%		—		—			—		50,000
The 167-3rd Won-denominated unsecured bond		Feb. 21. 2025	3.864%		—		—			—		10,000
The 167-4th Won-denominated unsecured bond		Dec. 22. 2025	3.858%		—		—			—		10,000
Subtotal							8,406,351					8,446,921
Less: Current portion							(1,154,101	)				(1,924,523	)
Discount on bonds							(23,728	)				(19,248	)
Total						￦	7,228,522				￦	6,503,150

1 As of December 31, 2023, the Controlling Company has outstanding notes in the amount of USD 100 million with fixed interest rates under Medium Term Note Program (“MTNP”) registered in the Singapore Stock Exchange, which allowed issuance of notes of up to USD 2,000 million. However, the MTNP has been terminated since 2007.

2 The Daily SOFR is approximately 5.380% as of December 31, 2023. Due to the recent suspension of LIBOR calculation, the Group changed the alternative indicator interest rate to Compounded SOFR+1.210 %.

3 The CMS (5Y) and CMS (10Y) is approximately 2.993% and 2.990%, respectively as of December 31, 2023.

2) Convertible bonds

(in millions of Korean won)
Type	Issuance Date		Maturity		Annual interest Rate		December 31, 2022			December 31, 2023
The 1st CB (Private)1		Jun. 5, 2020		Jun. 5, 2025		2	￦	8,000		￦	8,000
The 1st unsecured CB3		Jul. 25, 2022		Jan. 25, 2025		—		30,000			—
Redemption premium								4,565			2,267
Bond discount issuance								(7,206	)		(1,811	)
Subtotal								35,359			8,456
Current portion								—			(8,456	)
Total							￦	35,359		￦	—

1 Common shares of Storywiz are subject to conversion (appraisal period: June 5, 2021~May 4, 2025).

2 Nominal interest rate and maturity yield is approximately 0% and 5%, respectively, and will be settled on maturity.

3 During the current period, bonds of kt cloud are converted to 73,800 of Common shares and 73,800 of preference shares.

3) Borrowings

a. Short-term borrowings

(in millions of Korean won)			December 31, 2022				December 31, 2023
Type	Financial institution	Annual interest rates	Foreign currency		Korean won		Foreign currency		Korean won
Operational	Shinhan Bank	3.840%~6.430%		—	￦	105,000		—	￦	151,500
		—		—		30,000		—		—
	Woori Bank1,	—		—		50,000		—		—
		4.400%				—				70,000
		CD(91D)+1.960%		—		—		—		20,000
	Korea Development Bank	3.230%~4.950%		—		27,201		—		34,900
	Industrial Bank of Korea	4.862%		—		6,000		—		6,000
	Hana Bank1	CD(91D)+0.126%		—		5,000		—		4,800
	KB SECURITIES	4.110%~4.910%		—		94,822		—		69,635
	NH INVESTMENT & SECURITIES	—		—		20,000		—		—
	HSBC2	Compounded SOFR +2.100%		USD 18,500		23,451		USD 23,600		30,450
	NongHyup Bank	4.880%		—		9,000		—		8,500
		—		—		15,000		—		—
	IBK Securities	—		—		20,000		—		—
	Hi Investment & Securities	—		—		99,524		—		—
	Korea Investment	4.910%		—		—				30,000
				Total			￦	504,998	￦	425,785

1 CD (91D) is approximately 3.820% as of December 31, 2023.

2 The Daily SOFR is approximately 5.380% as of December 31, 2023.

b. Long-term borrowings

(in millions of Korean won and thousands of foreign currencies)			December 31, 2022					December 31, 2023
Financial institution	Type	Annual interest rates	Foreign currency		Korean won			Foreign currency		Korean won
Export-Import Bank of Korea	Inter-Korean Cooperation Fund1	1.00%		—	￦	1,974			—	￦	1,480
CA-CIB	General loans	3.380%~4.150%		—		200,000			—		200,000
JPM	General loans	2.700%~4.480%		—		100,000			—		200,000
DBS	General loans	4.079%		—		100,000			—		100,000
Shinhan Bank	General loans2	Term SOFR(3M)+1.100%		USD 8,910		11,292			USD 8,910		11,489
	General loans	—		USD 38,000		48,158			—		—
	General loans	1.900%~3.200%		USD 31,472		39,855			USD 31,472		40,655
	General loans3	4.490%		—		62,398			—		62,398
	General loans2	Term SOFR(3M)+1.300%		USD 21,127		26,774			USD 21,127		27,241
	General loans2	Term SOFR(3M)+1.940%		—		—			USD 35,000		45,129
	General loans2	CD(91D)+1.800%		—		—			—		16,900
	General loans2	EURIBOR(3M)+0.900%		EUR 7,700		10,404			EUR 7,700		10,985
Woori Bank	General loans	3.320%~5.800%		—		15,000			—		41,526
	PF loans	—		—		40,682			—		—
Hi Investment & Securities	CP	2.302%		—		90,724			—		92,994
Bookook Investment	CP	3.490%~3.603%		—		18,806			—		19,525
Korea Investment	CP	3.622%		—		73,039			—		75,928
Korea Development Bank	General loans	3.000%~4.870%		—		38,000			—		137,000
NH Jayang	PF loans2	CD(91D)+1.150%		—		59,066			—		53,033
Kyobo Life Insurance	PF loans2	CD(91D)+1.150%~CD(91D) +3.450%		—		66,390			—		84,586
Standard Chartered Bank Korea	PF loans2	CD(91D)+1.150%~CD(91D) +3.450%		—		44,260			—		56,390
General loans2		CD(91D)+0.750%		—		—			—		32,000
Samsung Life Insurance	PF loans	1.860%~4.160%		—		36,883			—		46,992
Subtotal						1,083,705					1,356,251
Less: Current portion						(167,943	)				(699,800	)
					￦	915,762				￦	656,451

1 The above Inter-Korean Cooperation Fund is repayable in installments over 13 years after a seven-year grace period.

2 EURIBOR (3M), Term SOFR (3M) and CD (91D) are approximately 3.909%, 5.331%, 3.820% respectively, as of December 31, 2023.

3 The general loans are repayable in installments over 4 years after a three-year grace period.

(2) Repayment schedule of the Group’s debentures and borrowings including the portion of current liabilities as of December 31, 2023, is as follows:

(in millions of Korean won)
	Bonds						Borrowings						Total
	In local currency		In foreign currency		Sub- total		In local currency		In foreign currency		Sub- total
Jan. 1, 2024 ~ Dec. 31, 2024	￦	1,478,000	￦	454,941	￦	1,932,941	￦	1,016,254	￦	109,331	￦	1,125,585	￦	3,058,526
Jan. 1, 2025 ~ Dec. 31, 2025		1,445,000		1,160,460		2,605,460		421,322		56,618		477,940		3,083,400
Jan. 1, 2026 ~ Dec. 31, 2026		760,000		515,760		1,275,760		109,087		—		109,087		1,384,847
Jan. 1, 2027 ~ Dec. 31, 2027		280,000		386,820		666,820		15,600		—		15,600		682,420
After Jan. 1, 2028		1,845,000		128,940		1,973,940		53,825		—		53,825		2,027,765
Total	￦	5,808,000	￦	2,646,921	￦	8,454,921	￦	1,616,088	￦	165,949	￦	1,782,037	￦	10,236,958

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Provisions

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Provisions

16. Provisions

Changes in provisions for the years ended December 31, 2022 and 2023, are as follows:

	2022
(in millions of Korean won)	Litigation			Restoration cost			Others			Total
Beginning balance	￦	80,165		￦	107,358		￦	69,874		￦	257,397
Increase (Transfer)		6,005			13,027			5,847			24,879
Usage		(6,155	)		(8,143	)		(15,783	)		(30,081	)
Reversal		(43,686	)		(3,685	)		(4,418	)		(51,789	)
Others		—			405			(445	)		(40	)
Ending balance	￦	36,329		￦	108,962		￦	55,075		￦	200,366
Current		34,730			19,918			54,485			109,133
Non-current	￦	1,599		￦	89,044		￦	590		￦	91,233
	2023
(in millions of Korean won)	Litigation			Restoration cost			Others			Total
Beginning balance	￦	36,329		￦	108,962		￦	55,075		￦	200,366
Increase (Transfer)		592			26,381			10,656			37,629
Usage		(7,179	)		(1,138	)		(6,391	)		(14,708	)
Reversal		(35	)		(653	)		(2,096	)		(2,784	)
Scope change		—			—			(177	)		(177	)
Others		—			(393	)		2,290			1,897
Ending balance	￦	29,707		￦	133,159		￦	59,357		￦	222,223
Current	￦	29,130		￦	26,945		￦	59,134		￦	115,209
Non-current		577			106,214			223			107,014

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Net Defined Benefit Liabilities (Assets)

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Net Defined Benefit Liabilities (Assets)

17. Net Defined Benefit Liabilities (Assets)

(1) The amounts recognized in the statements of financial position as of December 31, 2022 and 2023, are determined as follows:

(in millions of Korean won)	December 31, 2022			December 31, 2023
Present value of defined benefit obligations	￦	2,218,655		￦	2,365,793
Fair value of plan assets		(2,478,143	)		(2,462,925	)
Liabilities	￦	51,654		￦	63,616
Assets	￦	311,142		￦	160,748

(2) Changes in the defined benefit obligations for the years ended December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	2022			2023
Beginning	￦	2,494,930		￦	2,218,655
Current service cost		238,068			213,489
Interest expense		59,041			103,874
Benefit paid		(316,047	)		(358,298	)
Changes due to settlements of plan & Past Service Cost		(701	)		1
Remeasurements:
Actuarial gains (losses) arising from changes in demographic assumptions		(13,048	)		1,903
Actuarial gains (losses) arising from changes in financial assumptions		(323,501	)		138,462
Actuarial gains arising from experience adjustments		80,845			48,174
Acquisition and disposition of businesses, etc.		(932	)		(467	)
Ending	￦	2,218,655		￦	2,365,793

(3) Changes in the fair value of plan assets for the years ended December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	2022			2023
Beginning	￦	2,314,632		￦	2,478,143
Interest income		55,902			121,336
Remeasurements:
Return on plan assets (excluding amounts included in interest income)		(8,542	)		9,410
Benefits paid		(287,419	)		(307,762	)
Employer contributions		401,358			165,128
Acquisition and disposition of businesses, etc.		2,212			(3,330	)
Ending	￦	2,478,143		￦	2,462,925

(4) Amounts recognized in the consolidated statements of profit or loss for the years ended December 31, 2021, 2022 and 2023, are as follows:

(in millions of Korean won)	2021			2022			2023
Current service cost	￦	249,125		￦	238,068		￦	213,922
Net Interest cost		5,047			3,139			(17,462	)
Changes due to settlements of plan & Past Service Cost		(681	)		(701	)		1
Transfer out		(16,660	)		(15,102	)		(13,435	)
Total expenses	￦	236,831		￦	225,404		￦	183,026

(5) Principal actuarial assumptions used are as follows:

	December 31, 2021		December 31, 2022		December 31, 2023
Discount rate		2.1%~3.70%		2.4%~6.29%		3.67%~5.51%
Salary growth rate		1%~6.97%		1.82%~8.9%		1.7%~8.96%

(6) The sensitivity of the defined benefit obligations as of December 31, 2023, to changes in the principal assumptions is:

(In percentage, in millions of Korean won )	Effect on defined benefit obligation
	Changes in assumption	Increase in assumption		Decrease in assumption
Discount rate	0.5% point		￦(139,461)	￦	150,568
Salary growth rate	0.5% point		145,687		(135,431	)

A decrease in corporate bond yields will increase plan liabilities, although this will be partially offset by an increase in the value of the plans’ bond holdings.

The above sensitivity analysis is based on an assumption while holding all other assumptions constant. In practice, this is unlikely to occur, and changes in some of the assumptions may be correlated. The sensitivity of the defined benefit obligation to changes in principal actuarial assumptions is calculated using the projected unit credit method, the same method applied when calculating the defined benefit obligations recognized on the statement of financial position.

(7) Effect of defined benefit plan on future cash flows

The Group actively monitors how the duration and the expected yield of the investments match the expected cash outflows arising from the pension obligations. Expected contributions to post-employment benefit plans for the year ending December 31, 2023, are ￦273,503 million.

The expected maturity analysis of undiscounted pension benefits as of December 31, 2023, is as follows:

(in millions of Korean won)	Less than 1 year		Between 1- 2 years		Between 2- 5 years		Over 5 years		Total
Pension benefits	￦	257,315	￦	376,352	￦	910,076	￦	2,013,167	￦	3,556,910

The weighted average duration of the defined benefit obligations is 6.2 years.

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Defined Contribution Plan

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Defined Contribution Plan

18. Defined Contribution Plan

Recognized expense related to the defined contribution plan for the year ended December 31, 2023, is ￦85,174 million (2021: ￦71,068 million, 2022: ￦72,576 million).

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Commitments and Contingencies

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Commitments and Contingencies

19. Commitments and Contingencies

(1) As of December 31, 2023, major commitments with local financial institutions are as follows:

(in millions of Korean won and foreign currencies in thousands)	Financial institution	Limit		Used amount
Bank overdraft	Kookmin Bank and others		374,000		—
Inter-Korean Cooperation Fund	Export-Import Bank of Korea		37,700		1,480
Economic Cooperation Business Insurance	Export-Import Bank of Korea		3,240		1,732
Collateralized loan on electronic accounts receivable-trade	Kookmin Bank and others		545,350		42,822
Plus electronic notes payable	Industrial Bank of Korea		50,000		885
Working capital loan	Korea Development Bank and others		1,562,800		142,700
	Shinhan Bank		USD 76,509		USD 76,509
	Woori Bank		EUR 7,700		EUR 7,700
Facility loans	Shinhan Bank and others		924,000		429,924
Derivatives transaction limit	Korea Development Bank and others		USD 1,970,000		USD 1,970,000
Citi Bank			JPY 400,000		JPY 400,000
Total	KRW		3,497,090		619,543
	USD		2,046,509		2,046,509
	EUR		7,700		7,700
	JPY		400,000		400,000

(2) As of December 31, 2023, guarantees received from financial institutions are as follows:

(in millions of Korean won and foreign currencies in thousands)	Financial institution	Limit
Hana Bank	Guarantee for payment in Korean currency		4,000
	Comprehensive credit line and others		3,100
	Guarantee for payment in foreign currency		USD 59
	Comprehensive credit line and others		USD 10,300
Kookmin Bank	Guarantee for payment in foreign currency		USD 3,186
Shinhan Bank	Guarantee for payment in Korean currency and others		USD 94,517
	Guarantee for payment in foreign currency and others		VND 211,262
Woori Bank	Guarantee for payment in Korean currency		5,200
	Guarantee for payment in foreign currency		USD 7,000
Korea Development Bank	Refund guarantee for advances received		USD 6,811
HSBC	Guarantees for depositions		USD 816
Seoul Guarantee Insurance Company	Performance guarantee and others		366,395
Korea Software Financial Cooperative	Performance guarantee and others		1,556,979
Korea Specialty Contractor Financial Cooperative	Performance guarantee and others		135
Korea Housing Finance Corporation	Performance guarantee and others		44,000

(in millions of Korean won and foreign currencies in thousands)	Financial institution	Limit
Korea Housing & Urban Guarantee Corporation1	Performance guarantee and others		691,530
Information & Communication Financial Cooperative	Performance guarantee and others		78,183
Total	KRW		2,749,522
	USD		122,689
	VND		211,262

1 Inventory assets(￦278,031 million) and investment properties(￦283,688 million) are provided as collateral with commitment respectively, as of December 31, 2023.

(3) As of December 31, 2023, guarantees provided by the Group to a third party, are as follows:

(in millions of Korean won)	Subject to payment guarantees	Creditor	Limit		Used amount		Period
KT Estate Inc	Wonju Bando U-bora Mark Bridge Buyer	Hana Bank		103,000		55,314		Aug. 5, 2022 ~ Feb. 28, 2025
KT Engineering Co., Ltd.1	Gasan Solar Power Plant Inc.	Shinhan Bank		4,700		364		Jan. 7, 2010 ~ Jan. 8, 2025
KT Engineering Co., Ltd.1	Korea Cell Inc.	Suhyup Bank		3,250		50		Feb. 17, 2014 ~ Feb. 16, 2024
KT Engineering Co., Ltd.1	San-Ya Agricultural Association Corporation	Suhyup Bank		3,250		51		Feb. 17, 2014 ~ Feb. 16, 2024
KT Alpha Co., Ltd.	Cash payers	T-commerce cash payers		821		—		Apr. 14, 2023 ~ Apr. 12, 2024
Nasmedia Co., Ltd.	Stockholders Association Members	Korea Securities Finance Corp		1,104		610		—

1 KT Engineering Co., Ltd., a subsidiary of the Group, is subject to payment, depending on the reimbursement of principal debtor.

(4) The Controlling Company is jointly and severally obligated with KT Sat Co., Ltd., a subsidiary, to pay KT Sat Co., Ltd.’s liabilities incurred prior to spin-off. As of December 31, 2023, the Controlling Company and KT Sat Co., Ltd. are jointly and severally liable for reimbursement of ￦595 million.

(5) For the year ended December 31, 2023, the Group entered into agreements with the Securitization Specialty Companies (2023: First 5G 67th to 72th Securitization Specialty Co., Ltd., 2022: First 5G 61st to 66th Securitization Specialty Co., Ltd.) and disposed of its trade receivables related to handset sales. The Group also made asset management agreements with each securitization specialty company and in accordance with the agreement, the Group will receive asset management fees upon liquidation of the securitization specialty company.

(6) As of December 31, 2023, the Group is a defendant in 177 lawsuits with the total claimed amount of ￦167,834 million (2022: ￦80,279 million). As of December 31, 2023, litigation provisions of ￦29,707 million for pending lawsuits and unasserted claims are recorded as liabilities for potential loss in the ordinary course of business. The final outcomes of the cases cannot be estimated as of December 31, 2023.

(7) Under the agreement of bond issuance and borrowings, the Group is required to maintain certain financial ratios such as debt-to-equity ratio, use the funds for the designated purpose

and report to the creditors periodically. The covenant also contains restriction on provision of additional collateral and disposal of certain assets.

(8) As of December 31, 2023, the Group participates in Algerie Sidi Abdela new town development consortium (percentage of ownership: 2.5%) and has joint liability with other consortium participants.

(9) As of December 31, 2023, contract amount of property and equipment acquisition agreement made but not yet recognized amounts to ￦489,231 million (2022: ￦1,294,823 million).

(10) As of December 31, 2023, there are derivatives generated by the Group granting Drag-Along Right to financial investors participating in paid-in capital increase of K Bank (Note 7).

(11) The Group has an agreement with a transferor participated in share transfer agreement of MILLE Co., Ltd. As per the conditions of the agreement, the transferor may exercise Put Option for the ordinary shares it owns (Note 7).

(12) The Group entered into an agreement with financial investors of Epsilon Global Communications Pte. If certain conditions are not met in the future as disclosed in the terms and conditions of the agreement, financial investors may exercise Tag-Along Right, Drag-Along Right and the right to sell shares for the convertible preferred shares it owns (Note 7).

(13) The Group has an obligation for additional contributions as per agreement to Future Innovation Private Equity Fund No.3 and others. As of December 31, 2023, remaining amount of ￦4,132 million and USD 30,350 thousand will be invested through the Capital Call method in the future.

(14) The Group has the amount of ￦201,615 million (40%) of joint responsibility obligation and ￦302,423 million (60%) of obligation to provide financial support as a construction investor during the construction period with respect to K Defense Co., Ltd. established in accordance with the Private Investment Act on Social Infrastructure. During the operating period, the Group has the amount of ￦438,312 million (100%) of obligation to provide financial support as an operating investor.

(15) During the prior period, the Group entered into a stock sale contract with HYUNDAI MOBIS and HYUNDAI MOTOR COMPANY. If a certain period of time has elapsed from the date of the contract and the acquired stocks are to be disposed to a third party, HYUNDAI MOBIS and HYUNDAI MOTOR COMPANY may exercise a preferential purchase right to designate a buyer with priority.

(16) During the prior period, the Group entered into an agreement with LS Cable & System Ltd., which participated in the stock acquisition contract of KT Submarine Co., Ltd. (formerly KT Submarine Co., Ltd.). As per the agreement, the Group may exercise a put-option to LS Cable & System Ltd in the future (Note 7).

(17) During the period, the Group entered into an agreement with equity investors which participated in the stock acquisition contract of KT cloud Co., Ltd., Under the agreement, in specific occasion, equity investors may exercise a Tag-along or put-option to the Group in the future.

(18) The Group has the obligation of paying Minimum Guarantee as utilizing product bundling of Tving Co.,Ltd. and the right to be paid certain proportion of the excess as per agreement.

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Leases

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Leases

20. Leases

Information of leases in which the Group is a lessee is as follows. Information when the Group is a lessor is described in Note 11.

(1) Amounts recognized in the consolidated statements of financial position

The consolidated statement of financial position shows the following amounts relating to leases:

(in millions of Korean won)	December 31, 2022		December 31, 2023
Right-of-use assets
Property and building	￦	1,081,067	￦	1,019,537
Machinery and communication line facilities		50,794		89,150
Others		148,473		196,276
Total	￦	1,280,334	￦	1,304,963
(in millions of Korean won)	December 31, 2022		December 31, 2023
Lease liabilities1
Current	￦	315,892	￦	307,868
Non-Current		856,146		872,042
Total	￦	1,172,038	￦	1,179,910

1 Included in the line items ‘Other current liabilities and other non-current liabilities’ in the consolidated statements of financial position (Notes 9).

For the years ended December 31, 2022 and 2023, Right-of-use assets related to leases increased by ￦405,453 million and ￦440,552 million, respectively.

(2) Amounts recognized in the consolidated statements of profit or loss

The consolidated statement of profit or loss relating to leases for the year ended December 31, 2021,2022 and 2023 are as follows:

(in millions of Korean won)	December 31, 2021		December 31, 2022		December 31, 2023
Depreciation of Right-of-use assets
Property and building	￦	303,984	￦	305,120	￦	297,571
Machinery and communication line facilities		41,794		31,140		32,794
Others		52,938		59,954		72,372
Total	￦	398,716	￦	396,214	￦	402,737
Depreciation of Investment Properties	￦	1,794	￦	15	￦	—
Interest expense relating to lease liabilities		36,651		41,469		52,035
Expense relating to short-term leases		7,984		12,876		8,804
Expense relating to leases of low-value assets that are not short-term leases		26,033		26,813		26,290
Expense relating to variable lease payments not included in lease liabilities		8,400		4,827		9,288

The total cash outflow for leases for the year ended December 31, 2023 amounts to ￦500,392 million (2021: ￦468,360 million, 2022: ￦464,337 million).

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Share Capital

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Share Capital

21. Share Capital

As of December 31, 2022 and 2023, the Group has 1,000,000,000 shares authorized to issue and details are as follows:

December 31, 2022

December 31, 2023

Number of issued shares

Par value per share (Korean won)

Ordinary Shares (in millions of Korean won)

Number of issued shares

Par value per share (Korean won)

Ordinary Shares (in millions of Korean won)

Ordinary shares1

261,111,808

￦5,000

￦1,564,499

257,860,760

￦5,000

￦1,564,499

1 The Group retired 55,039,007 treasury shares against retained earnings. Based on the local regulations in Korea, upon retirement of shares, the Company has decreased the number of shares issued but has not decreased the ordinary shares capital.

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Retained Earnings

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Retained Earnings

22. Retained Earnings

Details of retained earnings as at December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	December 31, 2022		December 31, 2023
Legal reserve1	￦	782,249	￦	782,249
Voluntary reserves2		4,651,362		4,651,362
Unappropriated retained earnings		8,821,705		9,042,256
Total	￦	14,255,316	￦	14,475,867

1 The Commercial Code of the Republic of Korea requires the Controlling Company to appropriate, as a legal reserve, an amount equal to a minimum of 10% of cash dividends paid until such reserve equals 50% of its issued share capital. The reserve is not available for the payment of cash dividends but may be transferred to share capital with the approval of the Controlling Company’s Board of Directors or used to reduce accumulated deficit, if any, with the ratification of the Controlling Company’s majority shareholders.

2 The reserves of research and development of human resources in other surplus reserves are separately accumulated on disposal of retained earnings on tax filing adjustments when calculating income taxes in accordance with regulations of Tax Reduction and Exemption Control Act of Korea. Reversal of the reserves according to the relevant tax law can be paid out as dividends

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Accumulated Other Comprehensive Income and Other Components of Equity

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Accumulated Other Comprehensive Income and Other Components of Equity

23. Accumulated Other Comprehensive Income and Other Components of Equity

(1) As of December 31, 2022 and 2023, the details of the Controlling Company’s accumulated other comprehensive income are as follows:

(in millions of Korean won)	December 31, 2022			December 31, 2023
Changes in investments in associates and joint ventures	￦	(11,752	)	￦	4,023
Gain (loss) on derivatives valuation		(7,109	)		(29,361	)
Gain (loss) on valuation of financial assets at fair value through other comprehensive income		(52,100	)		73,928
Exchange differences on translation for foreign operations		(6,815	)		3,817
Total	￦	(77,776	)	￦	52,407

(2) Changes in accumulated other comprehensive income for the years ended December 31, 2022 and 2023, are as follows:

	2022
( in millions of Korean won)	Beginning			Increase/ decrease			Reclassification to gain or loss			Ending
Changes in investments in associates and joint ventures	￦	(3,461	)	￦	(8,291	)	￦	—		￦	(11,752	)
Gain (loss) on derivatives valuation		25,031			63,281			(95,421	)		(7,109	)
Gain on valuation of financial assets at fair value through other comprehensive income		108,685			(160,785	)		—			(52,100	)
Exchange differences on translation for foreign operations		(12,786	)		5,971			—			(6,815	)
Total	￦	117,469		￦	(99,824	)	￦	(95,421	)	￦	(77,776	)

	2023
(in millions of Korean won)	Beginning			Increase (decrease)		Reclassification to gain or loss			Ending
Changes in investments in associates and joint ventures	￦	(11,752	)	￦	15,775	￦	—		￦	4,023
Gain (loss) on derivatives valuation		(7,109	)		15,690		(37,942	)		(29,361	)
Gain (loss) on valuation of financial assets at fair value through other comprehensive income		(52,100	)		126,028		—			73,928
Exchange differences on translation for foreign operations		(6,815	)		10,632		—			3,817
Total	￦	(77,776	)	￦	168,125	￦	(37,942	)	￦	52,407

(3) The Group’s other components of equity as at December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	December 31, 2022			December 31, 2023
Treasury stock	￦	(202,295	)	￦	(398,075	)
Gain or loss on disposal of treasury stock 1		(41,503	)		3,220
Share-based payments		6,222			8,773
Equity transactions within consolidated entities 2		(334,576	)		(416,336	)
Total	￦	(572,152	)	￦	(802,418	)

1 The amount directly reflected in equity is ￦101 million for the year ended December 31, 2023 (2022: ￦14,886 million).

2 Profit or loss incurred from transactions with non-controlling interest and investment difference incurred from changes in ownership of subsidiaries are included.

(4) As of December 31, 2022 and 2023, the details of treasury stock are as follows:

	December 31, 2022		December 31, 2023
Number of shares (in shares)		5,069,130		11,447,338
Amounts (in millions of Korean won)	￦	202,295	￦	398,075

Treasury stocks held as of December 31, 2023, are expected to be used for stock compensation for the Group’s directors, employees, and other purposes.

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Share-based Payments

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Share-based Payments

24. Share-based Payments

(1) Details of share-based payments granted by the Controlling to executives and employees, including the CEO, by the resolution of the Board of Directors for the years ended December 31, 2022 and 2023, are as follows:

	2022
(in share)	16th grant
Grant date	June 9, 2022
Grantee	CEO, internal directors, external directors, executives
Vesting conditions	Service condition: 1 year Non-market performance condition: achievement of performance
Fair value per option (in Korean won)	￦36,941
Total compensation costs (in Korean won)	￦9,442 million
Exercise date	July 17, 2023
Valuation method	Fair value method

	2023
(in share)	17th grant
Grant date	June 15, 2023, Oct 17, 2023
Grantee	CEO, internal directors, external directors, executives
Vesting conditions	Service condition: 1 year Non-market performance condition: achievement of performance
Fair value per option (in Korean won)	￦30,205
Total compensation costs (in Korean won)	￦7,262 million
Estimated exercise date (exercise date)	During 2024
Valuation method	Fair value method

(2) Changes in the number of stock options and the weighted-average exercise price as at December 31, 2022 and 2023, are as follows:

(In share)	2022
	Beginning		Grant		Expired			Exercised1			Ending		Number of shares exercisable
15th grant		284,209		—		(155,286	)		(128,923	)		—		—
16th grant		—		258,509		—			—			258,509		—
Total		284,209		258,509		(155,286	)		(128,923	)		258,509		—
(In share)	2023
	Beginning		Grant		Expired			Exercised1			Ending		Number of shares exercisable
16th grant		258,509		—		(105,859	)		(131,690	)		20,960		—
17th grant		—		307,182		—			—			307,182		—
Total		258,509		307,182		(105,859	)		(131,690	)		328,142		—

1 The weighted average price of ordinary shares at the time of exercise, during the year ended December 31, 2023 is ￦29,550 (2022: ￦35,450).

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Revenue from Contracts with Customers, Other Income and Relevant Contract Assets and Liabilities

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Revenue from Contracts with Customers, Other Income and Relevant Contract Assets and Liabilities

25. Revenue from Contracts with Customers, Other Income and Relevant Contract Assets and Liabilities

(1) The Group has recognized the following amounts relating to revenue and other income in the statement of profit or loss:

(in millions of Korean won)	2021		2022		2023
Revenue from contracts with customers	￦	24,712,128	￦	25,432,727	￦	26,063,185
Revenue from other sources		185,877		206,128		224,016
Other income (Note 26)		307,654		595,351		308,044
Total revenue and other income	￦	25,205,659	￦	26,234,206	￦	26,595,245

(2) Operating revenues and other income for the years ended December 31, 2021, 2022 and 2023 are as follows:

(in millions of Korean won)	2021		2022		2023
Mobile services	￦	6,936,485	￦	7,013,889	￦	7,140,333
Fixed-line services		4,960,338		5,056,513		5,142,359
Fixed-line and VoIP telephone services		1,465,059		1,378,265		1,249,024
Broadband Internet access services		2,343,591		2,504,833		2,578,558
Data communication services		1,151,689		1,173,415		1,314,777
Media and content		2,800,630		3,099,776		3,206,521
Financial services		3,661,896		3,836,589		3,967,763
Sale of goods		3,532,973		3,393,646		3,292,514
Others		3,313,337		3,833,793		3,845,755
Total	￦	25,205,659	￦	26,234,206	￦	26,595,245

Mobile and fixed-line service

Telecommunication service revenues include mobile and fixed-line (e.g., fixed-line and VoIP telephone, broadband internet access services and data communication services). These services represent a series of distinct services that are considered a separate performance obligation. Service revenue is recognized when services are provided, based upon either usage (e.g., minutes of traffic/bytes of data processed) or period of time (e.g., monthly service fees).

Media and content services

Revenue from media and content services primarily consists of installation fees and basic monthly charges of IPTV and satellite TV services, as well as revenue from digital content distribution, digital music streaming and downloading. Media and contents services revenue are recognized when services are provided, based upon either usage or period of time.

Financial services

Financial services primarily include commissions for merchant fees paid by merchants to credit card companies for processing transactions. Revenue from the commission is recognized when the service obligation is performed.

Sale of goods

Revenue from sale of goods, primarily handsets related to our mobile services is recognized when a performance obligation is satisfied by transferring promised goods to customers.

(3) Contract assets and liabilities recognized in relation to the revenues from contracts with customers, are as follows:

(in millions of Korean won)	December 31, 2022		December 31, 2023
Contract assets1	￦	963,133	￦	1,130,745
Contract liabilities1		344,869		311,023
Deferred revenue2	￦	81,653	￦	81,067

1 The Group recognized contract assets of ￦308,821million and contract liabilities of ￦32,274 million for long-term construction contract as of December 31, 2023 (2022: contract assets of ￦160,880 million and contract liabilities of ￦60,762 million). The Group recognizes contract assets as trade receivables and other receivables, and contract liabilities as other current liabilities.

2 Deferred revenue recognized relating to government grant is excluded.

(4) The contract costs recognized as assets are as follows:

(in millions of Korean won)	2021		2022		2023
Incremental cost of contract establishment	￦	1,726,401	￦	1,744,096	￦	1,656,711
Cost of Contract performance		74,843		73,582		70,757

As at December 31, 2023, the Group recognized ￦1,759,586 million (2021: ￦1,842,621 million, 2022: ￦1,793,013 million) of operating expenses related to contract cost assets.

(5) The recognized revenue arising from carried-forward contract liabilities from prior year is as follows:

(in millions of Korean won)	2021		2022		2023
Revenue recognized that was included in the contract liabilities balance at the beginning of the year
Allocation of the transaction price	￦	275,965	￦	246,843	￦	213,609
Deferred revenue of joining/installment fee		42,100		44,204		41,824
Total	￦	318,065	￦	291,047	￦	255,433

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Other Income

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Other income

26. Other Income

Other income for the years ended December 31, 2021, 2022 and 2023, are as follows:

(in millions of Korean won)	2021		2022		2023
Gains on disposal of property and equipment and investment properties	￦	54,007	￦	52,603	￦	22,447
Gains on disposal of intangible assets		1,726		622		1,727
Gain on disposal of right-of-use assets		3,138		3,326		3,580
Property and Equipment loss recovery income		148,927		159,849		152,712
Income from government subsidies		43,822		44,473		40,725
Gain on disposal of investments in associates		5		38,319		6,982
Gain on disposal of investments in subsidiaries		244		216,591		28,825
Others1		55,785		79,568		51,046
Total	￦	307,654	￦	595,351	￦	308,044

1 Certain amounts that were previously reported in the table above have been grouped as Others.

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Operating Expenses

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Operating Expenses

27. Operating Expenses

(1) Operating expenses for the years ended December 31, 2021, 2022 and 2023, are as follows:

(in millions of Korean won)	2021		2022			2023
Employee benefit cost	￦	4,215,810	￦	4,495,885		￦	4,556,832
Depreciation		2,605,594		2,637,463			2,723,610
Depreciation of right-of-use assets		398,716		396,214			402,737
Amortization of intangible assets		603,327		622,202			683,784
Commissions		1,125,944		1,295,434			1,264,729
Interconnection charges		507,567		479,500			436,598
International interconnection fee		192,008		186,253			140,433
Purchase of inventories		3,753,792		3,656,040			3,595,345
Changes of inventories		20,491		(195,046	)		(203,071	)
Sales commission		2,343,375		2,353,909			2,353,318
Service cost1		2,296,324		2,334,386			2,229,709
Utilities		364,373		368,348			544,675
Taxes and dues		268,651		276,962			250,651
Rent		123,246		160,848			167,576
Insurance premium		66,717		68,245			66,737
Installation fee		154,542		150,140			174,238
Advertising expenses		171,400		195,519			153,750
Allowance for bad debts		82,329		115,358			150,549
Card service cost		3,114,047		3,127,673			3,189,376
Loss on disposal of property and equipment		71,417		81,415			72,710
Loss on disposal of intangible assets		3,885		7,015			5,328
Loss on disposal of right-of-use assets		11,457		2,348			2,115
Loss on disposal of investments in subsidiaries		13,727		—			—
Impairment loss on property and equipment		2,115		16,094			7,871
Impairment loss on intangible assets		3,747		30,965			236,206
Donations		10,981		15,642			24,664
Other allowance for bad debts		28,066		17,551			34,112
Others		952,614		1,369,686			1,902,214
Total	￦	23,506,262	￦	24,266,049		￦	25,166,796

1 Service cost is mainly recorded by purchase of service for system implementation and contents service.

(2) Details of employee benefit cost for the years ended December 31, 2021, 2022 and 2023, are as follows:

(in millions of Korean won)	2021		2022		2023
Salaries & Wages	￦	3,837,359	￦	4,161,874	￦	4,231,781
Post-employment benefits(Defined benefit plan)		236,831		225,404		183,026
Post-employment benefits(Defined contribution plan)		71,068		72,576		85,174
Share-based payment		47,415		16,799		15,450
Others		23,137		19,232		41,401
Total	￦	4,215,810	￦	4,495,885	￦	4,556,832

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Financial Income and Costs

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Financial Income and Costs

28. Financial Income and Costs

(1) Details of financial income for the years ended December 31, 2021, 2022 and 2023, are as follows:

(in millions of Korean won)	2021		2022		2023
Interest income	￦	273,460	￦	271,925	￦	279,607
Gain on foreign currency transactions		19,976		67,976		27,407
Gain on foreign currency translation		32,768		43,092		11,944
Gain on derivative transactions		2,215		50,668		12,304
Gain on valuation of derivatives		255,149		182,998		49,881
Gain on disposal of trade receivables		—		—		3,441
Gain on valuation of financial instruments		90,653		31,032		32,477
Others		52,062		42,737		69,216
Total	￦	726,283	￦	690,428	￦	486,277

(2) Details of financial costs for the years ended December 31, 2021, 2022 and 2023, are as follows:

(in millions of Korean won)	2021		2022		2023
Interest expenses	￦	263,389	￦	293,854	￦	356,345
Loss on foreign currency transactions		13,105		81,171		34,281
Loss on foreign currency translation		213,689		200,109		95,730
Loss on derivative transactions		6,287		24,331		417
Loss on valuation of derivatives		15,947		21,601		6,598
Loss on disposal of trade receivables		22,712		62,697		17,980
Loss on valuation of financial instruments		25,994		65,660		55,049
Others		2,207		485		2,282
Total	￦	563,330	￦	749,908	￦	568,682

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Deferred Income Tax and income Tax Expense

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Deferred Income Tax and income Tax Expense

29. Deferred Income Tax and income Tax Expense

(1) The analysis of deferred tax assets and deferred tax liabilities as at December 31, 2022 and 2023, is as follows:

(in millions of Korean won)	December 31, 2022			December 31, 2023
Deferred tax assets
Deferred tax assets to be recovered within 12 months	￦	398,710		￦	404,234
Deferred tax assets to be recovered after more than 12 months		1,907,690			1,824,099
Deferred tax assets before offsetting		2,306,400			2,228,333
Deferred tax liabilities
Deferred tax liabilities to be recovered within 12 months		(586,522	)		(491,817	)
Deferred tax liabilities to be recovered after more than 12 months		(2,108,438	)		(2,116,346	)
Deferred tax liabilities before offsetting		(2,694,960	)		(2,608,163	)
Deferred tax assets after offsetting	￦	579,090		￦	614,500
Deferred tax liabilities after offsetting	￦	967,650		￦	994,330

(2) The movement in deferred income tax assets and liabilities during the year, without taking into consideration the offsetting of balances within the same tax jurisdiction, is as follows:

(in millions of Korean won)	2022
	Beginning			Statement of profit or loss			Other comprehensive income			Ending
Deferred tax liabilities
Investments in subsidiaries, associates and joint ventures		(240,633	)		(18,299	)		3,748			(255,184	)
Depreciation and impairment loss		(88,588	)		(62,845	)		—			(151,433	)
Plan assets		(538,928	)		(5,294	)		1,322			(542,900	)
Advanced depreciation provision		(339,005	)		(182,934	)		—			(521,939	)
Contract assets		(493,917	)		69,615			—			(424,302	)
Financial assets at fair value through profit or loss		(336	)		(73	)		(11	)		(420	)
Financial assets at fair value through other comprehensive income		(47,521	)		(71,396	)		58,288			(60,629	)
Others		(623,744	)		(111,135	)		(3,274	)		(738,153	)
Total	￦	(2,372,672	)	￦	(382,361	)	￦	60,073		￦	(2,694,960	)
Deferred tax assets
Depreciation and impairment loss		225,821			(36,989	)		—			188,832
Contract liabilities		148,454			(27,165	)		—			121,289
Defined benefit liabilities		571,336			(22,423	)		(67,055	)		481,858
Provisions		172,871			(20,894	)		(22	)		151,955
Others		899,543			351,317			8,635			1,259,495
Total	￦	2,018,025		￦	243,846		￦	(58,442	)	￦	2,203,429
Temporary difference, net		(354,647	)		(138,515	)		1,631			(491,531	)
Tax credit carryforwards		134,417			(31,446	)		—			102,971
Total net balance	￦	(220,230	)	￦	(169,961	)	￦	1,631		￦	(388,560	)

(in millions of Korean won)	2023
	Beginning			Statement of profit or loss			Other comprehensive income			Ending
Deferred tax liabilities
Investments in subsidiaries, associates and joint ventures		(255,184	)		(7,821	)		(7,225	)		(270,230	)
Depreciation and impairment loss		(151,433	)		39,309			—			(112,124	)
Plan assets		(542,900	)		8,367			826			(533,707	)
Advanced depreciation provision		(521,939	)		3,859			—			(518,080	)
Contract assets		(424,302	)		2,478			—			(421,824	)
Financial assets at fair value through profit or loss		(420	)		461			43			84
Financial assets at fair value through other comprehensive income		(60,629	)		(53	)		(41,945	)		(102,627	)
Others		(738,153	)		90,876			(2,378	)		(649,655	)
Total	￦	(2,694,960	)	￦	137,476		￦	(50,679	)	￦	(2,608,163	)
Deferred tax assets
Depreciation and impairment loss		188,832			(71,689	)		(397	)		116,746
Contract liabilities		121,289			(9,311	)		—			111,978
Defined benefit liabilities		481,858			(6,705	)		40,838			515,991
Provisions		151,955			(5,784	)		—			146,171
Others		1,259,495			(53,459	)		2,141			1,208,177
Total	￦	2,203,429		￦	(146,948	)	￦	42,582		￦	2,099,063
Temporary difference, net		(491,531	)		(9,472	)		(8,097	)		(509,100	)
Tax credit carryforwards		102,971			26,299			—			129,270
Total net balance	￦	(388,560	)	￦	16,827		￦	(8,097	)	￦	(379,830	)

(3) The tax impacts recognized directly to equity as of December 31, 2021, 2022, and 2023, are as follows:

	December 31, 2021									December 31, 2022									December 31, 2023
(in millions of Korean won)	Before recognition			Tax effect			After recognition			Before recognition			Tax effect			After recognition			Before recognition			Tax effect			After recognition
Gain (loss) on valuation of financial assets at fair value through other comprehensive income	￦	163,892		￦	(34,112	)	￦	129,780		￦	(216,862	)	￦	58,288		￦	(158,574	)	￦	163,750		￦	(41,945	)	￦	121,805
Gain (loss) on valuation of hedge instruments		6,916			(1,644	)		5,272			(42,510	)		11,180			(31,330	)		(30,168	)		7,555			(22,613	)
Remeasurements of net defined benefit liabilities		74,518			(18,696	)		55,822			247,162			(65,733	)		181,429			(179,129	)		41,664			(137,465	)
Share of gain (loss) of associates and joint ventures, and others		(34,909	)		9,097			(25,812	)		(14,931	)		3,748			(11,183	)		28,715			(7,225	)		21,490
Exchange differences on translation for foreign operations		683			(178	)		505			23,316			(5,852	)		17,464			32,376			(8,146	)		24,230
Gain or loss on disposal of treasury stock		(15,657	)		4,080			(11,577	)		(59,308	)		14,886			(44,422	)		402			(101	)		301
Total	￦	195,443		￦	(41,453	)	￦	153,990		￦	(63,133	)	￦	16,517		￦	(46,616	)	￦	15,946		￦	(8,198)		￦	7,748

(4) Details of income tax expense for the years ended December 31, 2021, 2022 and 2023, are calculated as follows:

(in millions of Korean won)	2021		2022		2023
Current income tax expense	￦	289,471	￦	335,796	￦	347,265
Impact of change in deferred taxes		229,545		169,961		(16,827	)
Income tax expense	￦	519,016	￦	505,757	￦	330,438

(5) The tax on the Group’s profit before tax differs from the theoretical amount that would arise using the weighted average tax rate applicable to profits of the entities as follows:

(in millions of Korean won)	2021			2022			2023
Profit before income tax expense	￦	1,978,411		￦	1,891,392		￦	1,302,620
Statutory income tax expense	￦	533,701		￦	509,771		￦	333,530
Tax effect
Income not taxable for taxation purposes		(4,307	)		(47,550	)		(30,106	)
Non-deductible expenses		20,570			53,398			26,723
Tax credit		(31,517	)		(54,895	)		(78,459	)
Additional payment of income taxes		(221	)		11,744			(4,991	)
Adjustments in deferred tax from changes in tax rate		—			(41,545	)		564
Tax effect and adjustment on consolidation
Goodwill impairment		—			5,809			106,010
Eliminated dividend income form subsidiaries		7,264			—			—
Changes of out-side tax effect		4,738			29,922			4,436
Intangible Asset impairment and amortization		796			5,276			5,892
Reversal expenses of contract cost assets		(2,932	)		(4,800	)		9,281
Acquisition and disposition of businesses		(5,128	)		—			—
Others		(3,948	)		38,627			(42,442	)
Income tax expense	￦	519,016		￦	505,757		￦	330,438

(6) Details of deferred tax assets and liabilities that are not recognized as at December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	2022		2023
Deductible temporary differences
Investment in subsidiaries, associates, and joint ventures	￦	3,384,295	￦	3,520,173
Unused tax loss		103,326		203,200
Unused Tax credit		1,988		2,338
Others		387,084		437,238
Total	￦	3,876,693	￦	4,162,949
Taxable temporary differences
Investment in subsidiaries, associates, and joint ventures	￦	857,076	￦	903,394
Others		216,660		211,201
Total	￦	1,073,736	￦	1,114,595

(7) The expected period of expiry for unused tax losses not recognized in deferred tax assets as of December 31, 2022 and 2023, is as follows:

(in millions of Korean won)	2022		2023
2023	￦	72,512	￦	4,484
2024		5,011		2,836
2025		3,701		2,086
2026		2,112		4,541
2027		2,534		2,473
2028		396		6,533
2029		617		743
2030		2,198		713
2031		1,360		756
2032		7,450		—
Atter 2033		5,435		178,035
Total	￦	103,326	￦	203,200

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Earnings per Share

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Earnings per Share

30. Earnings per Share

 

(1) Basic Earnings per Share

Basic earnings per share is calculated by dividing the profit from operations attributable to equity holders of the Group by the weighted average number of ordinary shares outstanding during the period, excluding ordinary shares purchased by the Group and held as treasury stock.

Basic earnings per share from operations for the years ended December 31, 2021, 2022 and 2023, is calculated as follows:

	2021		2022		2023
Profit attributable to ordinary shares of owners of the Controlling Company (in millions of Korean won)	￦	1,354,537	￦	1,259,686	￦	993,325
Weighted average number of ordinary shares outstanding (in number of shares)		235,201,782		242,235,332		249,470,072
Basic earnings per share (in Korean won)	￦	5,759	￦	5,200	￦	3,982

Diluted earnings per share from operations is calculated by adjusting the weighted average number of ordinary shares outstanding to assume conversion of all dilutive potential ordinary shares. The Group has dilutive potential ordinary shares from convertible bond and other share-based compensation.

(2) Diluted Earnings per Share

Diluted earnings per share from operations is calculated by adjusting the weighted average number of ordinary shares outstanding assuming that all dilutive potential ordinary shares are converted into ordinary shares. The Group has dilutive potential ordinary shares from convertible bonds, convertible preferred stock and other share-based payments:

	2021		2022			2023
Profit attributable to ordinary shares of owners of the Controlling Company (in millions of Korean won)	￦	1,354,537	￦	1,259,686		￦	993,325
Adjustment to net income attributable to ordinary shares (in millions of Korean won)		—		(496	)		(827	)
Diluted profit attributable to ordinary shares (in millions of Korean won)		1,354,537		1,259,190			992,498
Number of dilutive potential ordinary shares outstanding (in number of shares)		483,760		91,931			119,263
Weighted average number of ordinary shares outstanding (in number of shares)		235,685,542		242,327,263			249,589,335
Diluted earnings per share (in Korean won)	￦	5,747	￦	5,196		￦	3,977

Diluted earnings per share is earnings per outstanding of ordinary shares and dilutive potential ordinary shares. Diluted earnings per share is calculated by dividing adjusted profit for the year by the sum of the number of ordinary shares and dilutive potential ordinary shares. Convertible bonds and convertible preferred stocks without dilutive effects are excluded from the calculation.

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Dividend

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Dividend

31. Dividend

The dividends paid by the Parent in 2021, 2022 and 2023 were ￦326,487 million (￦1,350 per share), ￦450,394 million (￦1,910 per share), ￦501,844 million (￦1,960 per share), respectively. A dividend in respect of the year ended December 31, 2023, of ￦1,960 per share, amounting to a total dividend of ￦482,970 million, is to be proposed at the shareholders’ meeting on March 28, 2024.

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Cash Generated from Operations

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Cash Generated from Operations

32. Cash Generated from Operations

(1) Cash flows from operating activities for the years ended December 31, 2021, 2022 and 2023, are as follows:

(in millions of Korean won)	2021			2022			2023
1. Profit for the year	￦	1,459,395		￦	1,385,635		￦	972,182
2. Adjustments to reconcile net income
Income tax expense		519,016			505,757			335,367
Interest income 1		(300,900	)		(340,794	)		(392,580	)
Interest expense 1		268,847			320,914			410,566
Dividends income 2		(21,525	)		(14,121	)		(59,758	)
Depreciation		2,643,894			2,687,191			2,773,152
Amortization of intangible assets		604,744			627,261			691,909
Depreciation of right-of-use assets		398,716			396,214			402,737
Provision for severance benefits (defined benefits)		253,491			240,506			196,027
Impairment losses on trade receivables		105,344			132,102			175,244
Share of net profit or loss of associates and joint ventures		(116,061	)		16,821			44,323
Loss(gain) on disposal of associates and joint ventures		1			(38,024	)		(6,982	)
Loss(gain) on the disposal of subsidiaries		13,483			(216,591	)		(28,825	)
Loss(gain) on disposal of right-of-use assets		8,319			(978	)		(1,465	)
Impairment losses on assets held for sale		11			—			—
Impairment loss on property and equipment and investment in properties		2,115			16,094			7,871
Loss(gain) on disposal of property and equipment and investment in properties 3		17,410			(66,317	)		511
Loss on disposal of intangible assets		2,159			6,393			3,601
Loss on impairment of intangible assets		3,747			30,674			236,106
Loss on foreign currency translation		180,921			157,017			83,899
Gain on valuation and settlement of derivatives, net		(235,130	)		(205,381	)		(37,249	)
Gain on disposal of financial assets at fair value through profit or loss		(29,974	)		(2,347	)		(2,225	)
Loss(Gain) on valuation of financial assets at fair value through profit or loss		(64,660	)		44,833			13,920
Loss(gain) on disposal of financial assets at amortized cost 4		(35	)		3			1
Others		84,625			(49,891	)		158,820
3. Change in operating assets and liabilities, net of effects from purchase of controlled entity and sale of engineering division
Decrease(increase) in trade receivables		327,031			(43,787	)		(124,023	)
Increase in other receivables		(328,610	)		(1,598,216	)		(1,085,527	)
Decrease(increase) in other current assets		(89,230	)		(101,947	)		250,569
Increase in other non-current assets		(143,087	)		(120,054	)		(86,030	)
Decrease(increase) in inventories		32,798			(179,255	)		(317,531	)
Increase(decrease) in trade payables		289,044			(368,355	)		121,515
Increase in other payables		207,583			1,103,113			829,220
Increase(decrease) in other current liabilities		107,993			(30,375	)		414,436
Decrease in other non-current liabilities		(14,915	)		(1,015	)		(14,272	)
Decrease in provisions		(4,668	)		(22,115	)		(5,083	)
Increase(decrease) in deferred revenue		3,696			(384	)		905
Decrease(increase) in plan assets		(114,631	)		(90,771	)		115,725
Payment of post-employment benefits		(241,350	)		(343,931	)		(329,861	)
4. Cash generated from operations (1+2+3)	￦	5,829,607		￦	3,835,879		￦	5,747,195

1 BC Card CO., Ltd. and other subsidiaries of the Group recognize interest income and expense as operating revenue and expense, respectively, including interest income of ￦112,973 million (2021: ￦27,440 million, 2022: ￦68,869 million) and interest expense of ￦55,677 million that are recognized as operating revenue and expense, respectively, for the year ended December 31, 2023 (2021: ￦5,458 million, 2022: ￦27,060 million).

2 BC Card Co., Ltd. Recognized dividend income as operating revenue, including dividend income of ￦1,759 million that is recognized as operating revenue for the year ended December 31, 2023 (2021: ￦1,340 million, 2022: ￦2,299 million).

3 KT Estate Inc. recognized gain and loss on disposal of investment properties as operating revenue and expense, respectively, including gain on disposal of investment properties of ￦49,752 million that is recognized as operating revenue for the year ended December 31, 2023.

4 KT Investment CO., Ltd. and other subsidiaries of the Group recognized gain and loss on valuation of financial assets at fair value through profit or loss as operating revenue and expense, respectively, including loss on valuation of financial assets at fair value through profit or loss of ￦11,112 million that is recognized as operating expense for the year ended December 31, 2023.

(2) Significant transactions not affecting cash flows for the years ended December 31, 2021, 2022 and 2023, are as follows:

(in millions of Korean won)	2021			2022			2023
Reclassification of the current portion of borrowings	￦	1,303,543		￦	1,004,818		￦	1,731,998
Reclassification of construction-in-progress to property and equipment		2,916,888			3,167,965			3,123,611
Reclassification of accounts payable from property and equipment		(149,512	)		(7,055	)		(293,448	)
Reclassification of accounts payable from intangible assets		524,040			(197,389	)		(276,491	)
Reclassification of payable from defined benefit liabilities		69,415			(32,417	)		26,246
Reclassification of payable from plan assets		(60,320	)		28,532			(24,821	)
Disposal of treasury stock related to acquisition of financial assets		—			747,161			—
Acquisition of financial assets related to disposal of a subsidiary		—			250,000			—

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Changes in Liabilities Arising from Financing Activities

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Changes in Liabilities Arising from Financing Activities

33. Changes in Liabilities Arising from Financing Activities

Details of changes in liabilities arising from financing activities, liabilities related to cashflow to be classified as future financing activities, for the years ended December 31, 2021, 2022 and 2023, are as follows:

(in millions of Korean won)	2021
	Beginning			Cash flows			Non-cash											Ending
							Newly acquired		Changes in FX rate		Fair Value changes		Acquisition and disposition of businesses		Others
Borrowing	￦	7,316,298		￦	900,394		￦	52,782	￦	196,890	￦	—	￦	15,994	￦	(44,655)		￦	8,437,703
Lease liabilities		1,143,640			(394,567	)		403,451		3		90		36,840		(30,088)			1,159,369
Derivative liabilities		130,573			(1,712	)		2,637		(4,311)		(4,892)		—		(47,119)			75,176
Derivative assets		(7,606	)		216			—		(189,700)		(17,251)		—		114,888			(99,453	)
Total	￦	8,582,905		￦	504,331		￦	458,870	￦	2,882	￦	(22,053)	￦	52,834	￦	(6,974	)	￦	9,572,795

(in millions of Korean won)	2022
	Beginning			Cash flows			Non-cash											Ending
							Newly acquired			Changes in FX rate		Fair Value changes		Acquisition and disposition of businesses		Others
Borrowing	￦	8,437,703		￦	1,391,321		￦	—		￦	146,108	￦	939	￦	—	￦	30,614	￦	10,006,685
Lease liabilities		1,159,369			(378,684	)		427,398			—		—		—		(36,045)		1,172,038
Derivative liabilities		75,176			(41,197	)		—			19,858		12,941		—		(33,223)		33,555
Derivative assets		(99,453	)		76,280			(754	)		(147,161)		30,341		—		(50,083)		(190,830	)
Total	￦	9,572,795		￦	1,047,720		￦	426,644		￦	18,805	￦	44,221	￦	—	￦	(88,737)	￦	11,021,448

(in millions of Korean won)	2023
	Beginning			Cash flows			Non-cash											Ending
							Newly acquired		Changes in FX rate		Fair value changes		Acquisition and disposition of businesses		Others
Borrowing	￦	10,006,685		￦	106,118		￦	—	￦	45,370	￦	1,719	￦	—	￦	58,273		￦	10,218,165
Lease liabilities		1,172,038			(407,051	)		460,617		—		24		—		(45,719)			1,179,909
Derivative liabilities		33,555			—			—		10,888		9,643		—		(29,539)			24,547
Derivative assets		(190,830	)		48,183			—		32,487		1,788		—		(50,839	)		(159,211	)
Total	￦	11,021,448		￦	(252,750)		￦	460,617	￦	88,745	￦	13,174	￦	—	￦	(67,824)		￦	11,263,410

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Segment Information

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Segment Information

34. Segment Information

(1) The management of the Group determines the operating and reporting segments based on the reported information when establishing the business strategy.

Details	Business service
ICT	Mobile/fixed line telecommunication service and convergence business, B2B business and others
Finance	Credit card business
Satellite TV Real estate	Satellite TV business Residential building development and supply
Others	Cable television service, IT, facility security and global business, and others

(2) Details of each segment for the years ended December 31, 2021, 2022 and 2023, are as follows:

	2021
(in millions of Korean won)	Operating revenues			Operating Income			Depreciation and Amortization1
ICT	￦	18,734,342		￦	1,170,920		￦	3,217,643
Finance		3,526,743			104,511			46,223
Satellite TV		665,081			61,398			60,980
Real estate		336,218			27,498			60,459
Others		6,474,858			390,903			327,202
Total		29,737,242			1,755,230			3,712,507
Elimination2		(4,531,583	)		(55,833	)		(104,869	)
Consolidated amount	￦	25,205,659		￦	1,699,397		￦	3,607,638

	2022
(in millions of Korean won)	Operating revenues			Operating Income			Depreciation and Amortization1
ICT	￦	18,697,269		￦	1,347,405		￦	3,105,807
Finance		3,615,307			119,805			47,638
Satellite TV		709,160			19,797			58,413
Real estate		474,954			113,134			65,457
Others		7,960,143			473,276			575,035
Total		31,456,833			2,073,417			3,852,350
Elimination2		(5,222,627	)		(105,260	)		(196,471	)
Consolidated amount	￦	26,234,206		￦	1,968,157		￦	3,655,879

	2023
(in millions of Korean won)	Operating revenues			Operating Income			Depreciation and Amortization1
ICT	￦	18,698,964		￦	1,193,333		￦	3,183,408
Finance		3,723,286			91,591			37,150
Satellite TV		714,574			(70,170	)		52,871
Real estate		499,997			73,496			70,653
Others		8,145,272			97,568			584,738
Total		31,782,093			1,385,818			3,928,820
Elimination2		(5,186,848	)		42,631			(118,689	)
Consolidated amount	￦	26,595,245		￦	1,428,449		￦	3,810,131

1 Sum of the amortization of tangible assets, intangible assets, investment properties, and right-of-use assets.

2 Elimination for operating revenues is the difference between operating revenue included in the CODM report, which is based on Korean IFRS and operating revenue based on IFRS. Elimination for depreciation and amortization and operating revenues also included consolidated adjustments due to intercompany transactions with the group.

(3) Operating revenues for the years ended December 31, 2021, 2022 and 2023 and non-current assets as at December 31, 2022 and 2023 by geographical regions, are as follows:

(In millions of Korean won)	Operating revenues						Non-current assets1
Location	2021		2022		2023		2022.12.31		2023.12.31
Domestic	￦	25,114,719	￦	26,074,349	￦	26,425,735	￦	20,845,214	￦	20,725,694
Overseas		90,940		159,857		169,510		270,490		183,344
Total	￦	25,205,659	￦	26,234,206	￦	26,595,245	￦	21,115,704	￦	20,909,038

1 Sum of property and equipment, intangible assets, investment properties and right-of-use assets.

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Related Party Transactions

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Related Party Transactions

35. Related Party Transactions

(1) The list of related party of the Group as of December 31, 2023, is as follows:

Relationship	Name of Entity
Associates and joint ventures	There are 54 Associates and joint ventures, and entities listed on the table below has Related Party Transactions
Others1	Goody Studio Co., Ltd., Rebellion Inc., Digital Pharm Co., Ltd., Mastern No.127 Logispoint Daegu Co., Ltd., KORAMKO No. 143 General Private Real Estate Investment Company

1 The investment in preferred shares in these entities are accounted for under IFRS 9. Given the Company’s significant influence in the investees, those are included in the list of related parties.

(2) Outstanding balances of receivables and payables in relations to transactions with related parties as of December 31, 2022 and 2023, are as follows:

		December 31, 2022
		Receivables				Payables
(in millions of Korean won)		Trade receivables		Other receivables		Trade payables		Other payables		Lease liabilities
Associates and joint ventures	K Bank, Inc.	￦	682	￦	258,999	￦	—	￦	299	￦	—
	Little Big Pictures		1,454		7,645		—		9		—
	K-Realty 11th Real Estate Investment Trust Company		151		1,283		—		—		8,824
	Others		2,285		2		3,235		2,932		—
Total		￦	4,572	￦	267,929	￦	3,235	￦	3,240	￦	8,824

 

		December 31, 2023
		Receivables						Payables
(in millions of Korean won)		Trade receivables		Other receivables		Lease receivables		Trade payables		Other payables		Lease liabilities
Associates and joint ventures	K Bank, Inc.	￦	862	￦	326,006	￦	769	￦	—	￦	299	￦	—
	Little Big Pictures		232		3,473		—		9		6		—
	K-Realty 11th Real Estate Investment Trust Company		110		1,283		—		—		—		6,732
	K-Realty No.3 Real Estate General Private Placement Investment Company		4,576		—		—		—		—		—
	Others		2,044		162		—		2,900		3,029		—
Total		￦	7,824	￦	330,924	￦	769	￦	2,909	￦	3,334	￦	6,732

(3) Significant transactions with related parties for the years ended December 31, 2021, 2022 and 2023, are as follows:

		2021
(in millions of Korean won)		Sales		Purchases1
Associates and joint ventures	K- Realty CR-REITs No.1	￦	238,847	￦	1,308
	IGIS Professional Investors Private Investment Real Estate Investment LLC No. 395		5,000		—
	K Bank, Inc.		24,247		15,164
	Others2,3		28,092		21,302
Total			296,186		37,774

		2021
(in millions of Korean won)		Interest income		Interest expense		Dividend income
Associates and joint ventures	K- Realty CR-REITs No.1		￦—		￦205		￦40,142
	Korea Information & Technology Investment Fund (KIF Investment Fund)		223		—		—
	K Bank, Inc.		—		—		—
	Others2,3		—		—		8,637
Total		￦	223	￦	205	￦	48,779

1 Amounts include acquisition of property and equipment, and others.

2 Transaction amount before OSKENT Co., Ltd., Mission Culture Industry Limited, Sweet and Sour Culture Industry Limited, Alma Mater Culture Industry Limited, and KT Philippines are excluded from associates and joint ventures.

3 Includes transactions of Oscar Ent. before it was excluded as associates and joint ventures of the Group.

		2022
(in millions of Korean won)		Operating Revenue		Purchases1
Associates and joint ventures	K- Realty CR-REITs No.12	￦	—	￦	—
	K Bank, Inc.		29,536		11,007
	Hyundai Robotics Co., Ltd.1		94		3,799
	K-Realty 11th Real Estate Investment Trust Company		330		1,674
	Others3		11,964		37,742
Others	Digital Pharm Co., Ltd.		1		—
Total			41,925		54,222

		2022
(in millions of Korean won)		Acquisition of right-of-use assets		Interest income		Interest expense		Dividend income
Associates and joint ventures	K- Realty CR-REITs No.1 2	￦	—	￦	—	￦	—	￦	45,549
	K Bank, Inc.		—		3,052		—		—
	Hyundai Robotics Co., Ltd. 1		—		—		—		—
	K-Realty 11th Real Estate Investment Trust Company		1,966		—		260		162
	Others 3		—		—		—		9,158
Total		￦	1,966	￦	3,052	￦	260	￦	54,869

1 Amounts include acquisition of property and equipment, and others.

2 Includes transactions of the entity before it was excluded as an associate and joint venture of the Group.

3 Includes transactions of StorySoop Inc. before it was excluded as associates and joint ventures of the Group.

		2023
(in millions of Korean won)		Operating Revenue		Purchases1
Associates and joint ventures	K Bank, Inc.	￦	22,701	￦	13,429
	HD Hyundai Robotics Co., Ltd. (formerly Hyundai Robotics Co., Ltd.)		78		182
	K-Realty 11th Real Estate Investment Trust Company		346		2,559
	K-Realty No.3 Real Estate General Private Placement Investment Company		6,216		—
	Others 2 3		21,308		42,169
Others	Digital Pharm Co., Ltd.		1		—
Total			50,650		58,339

		2023
(in millions of Korean won)		Acquisition of right-of-use assets		Interest income		Interest expense		Dividend income
Associates and joint ventures	K Bank, Inc.	￦	—	￦	8,264	￦	—	￦	—
	HD Hyundai Robotics Co., Ltd.(formerly Hyundai Robotics Co., Ltd.)		—		—		—		—
	K-Realty 11th Real Estate Investment Trust Company		7		—		261		507
	Others 2 3		—		—		—		1,279
Total		￦	7	￦	8,264	￦	261	￦	1,786

1 Amounts include acquisition of property and equipment, and others.

2 Includes transactions of KD Living Co., Ltd. before it was included as a subsidiary.

3 Includes transactions of FUNDA Co., Ltd, Maruee Limited Company Specializing in the Cultural Industry, Mastern No.127 Logispoint Daegu Co., Ltd. before it was excluded as associates and joint ventures of the Group.

(4) Key management compensation for the years ended December 31, 2021, 2022 and 2023, consists of:

(in millions of Korean won)	2021		2022		2023
Salaries and other short-term benefits	￦	2,189	￦	1,855	￦	1,494
Post-employment benefits		412		294		153
Share-based compensation		669		976		569
Total	￦	3,270	￦	3,125	￦	2,216

(5) Fund transactions with related parties for the years ended December 31, 2021, 2022 and 2023, are as follows:

	2021
(in millions of Korean won)	Borrowing transactions1				Equity contributions in cash
Associates and joint ventures	Borrowings		Repayments
K- REALTY CR REIT1	￦	—	￦	15,964	￦	—
K Bank, Inc.		—		—		424,957
Pacific Professional Investors Private Investment Real Estate Investment LLC No. 55		—		—		11,000
KT Young Entrepreneurs DNA Investment Fund		—		—		8,400
Mastern KT Multi-Family Real Estate Private Equity Investment Fund1		—		—		6,055
KT-IBKC Future Investment Fund1		—		—		(5,700	)
Others 2		—		—		18,176
Total	￦	—	￦	15,964	￦	462,888

1 Borrowing transactions include lease transactions.

2 Others include transactions before exclusion as associates and joint ventures of the Group.

	2022
(in millions of Korean won)	Borrowing transactions1				Equity contributions in cash
Associates and joint ventures	Borrowings		Repayments
Megazone Cloud Corporation	￦	30,000	￦	—	￦	130,001
IBK-KT Emerging Digital Industry Investment Fund		—		—		10,800
Mastern KT Multi-Family Real Estate Private Equity Investment Fund1		—		—		18,859
IGIS No. 468-1 General Private Real Estate Investment Company		—		—		25,000
K-Realty 11th Real Estate Investment Trust Company		1,916		771		—
Others		—		—		93,478
Total	￦	31,916	￦	771	￦	278,138

1 Lease transactions are included in borrowing transactions.

	2023
(in millions of Korean won)	Borrowing transactions1				Equity contributions in cash
Associates and joint ventures	Borrowings		Repayments
K-Realty 11th Real Estate Investment Trust Company	￦	—	￦	1,037	￦	—
STIC Place General Private Placement Real Estate Investment Trust No.2		—		—		20,000
Telco Credit Bureau Co.,Ltd.		—		—		6,500
Pacific geumto no.75 private hybrid asset fund		—		—		19,000
Kiamco Data Center Blind Fund		—		—		15,000
STIC Mixed Asset Investment Trust No.1		—		—		10,930
Others2		—		—		31,107
Others
Rebellions Co.,Ltd.		—		—		19,998
Total	￦	—	￦	1,037	￦	122,535

1 Lease transactions are included in borrowing transactions.

2 Includes transaction details before Daemuga Limited Company Specializing in the Cultural Industry, Maruee Limited Company Specializing in the Cultural Industry were excluded from the associates company.

(6) Provision of collateral and investment agreement and others

Provision of collateral and investment agreement The Group has an obligation to invest in Kiamco Data Center Blind Fund, a related party, and others according to the agreement. As of December 31, 2023 the Company is planning make an additional investment of ￦107,774 million

(7) As of December 31, 2023, the limit of the credit card contract provided by the Group to K Bank,

Inc. is ￦1,050 million (December 31, 2022: ￦1,000 million).

XML

Financial Risk Management

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Financial Risk Management

36. Financial Risk Management

(1) Financial Risk Factors

The Group’s activities expose it to a variety of financial risks: market risk, credit risk and liquidity risk. The Group’s overall risk management program focuses on the unpredictability of financial markets and seeks to minimize potential adverse effects on the Group’s financial performance. The Group uses derivative financial instruments to hedge certain risk exposures such as cash flow risk.

The Group’s financial policy is set up in the long-term perspective and annually reported to the Board of Directors. The financial risk management is carried out by the Value Management Office, which identifies, evaluates and hedges financial risks. The treasury department in the Value Management Office considers various finance market conditions to estimate the effect from the market changes.

1) Market risk

The Group’s market risk management focuses on controlling the extent of exposure to the risk in order to minimize revenue volatility. Market risk is a risk that decreases value or profit of the Group’s portfolio due to changes in market interest rate, foreign exchange rate and other factors.

(i) Sensitivity analysis

Sensitivity analysis is performed for each type of market risk to which the Group is exposed. Reasonably possible changes in the relevant risk variable such as prevailing market interest rates, currency rates, equity prices or commodity prices are estimated and if the rate of change in the underlying risk variable is stable, the Group does not alter the chosen reasonably possible change in the risk variable. The reasonably possible change does not include remote or ‘worst case’ scenarios or ‘stress tests’.

(ii) Foreign exchange risk

The Group is exposed to foreign exchange risk arising from operating, investing and financing activities. Foreign exchange risk is managed within the range of the possible effect on the Group’s cash flows. Foreign exchange risk (i.e. foreign currency translation of overseas operating assets and liabilities) unaffecting the Group’s cash flows is not hedged but can be hedged at a particular situation.

As of December 31, 2021, 2022 and 2023, if the foreign exchange rate had strengthened/weakened by 10% with all other variables held constant, the effects on profit before income tax and shareholders’ equity would have been as follows:

(in millions of Korean won)	Fluctuation of foreign exchange rate			Impact on profit before income tax1			Impact on equity
2021.12.31		10	%	￦	(3,433	)	￦	8,692
		-10	%		3,433			(8,692	)
2022.12.31		10	%	￦	(5,841	)	￦	(15,836	)
		-10	%		5,841			15,836
2023.12.31		10	%	￦	(10,313	)	￦	(18,460	)
		-10	%		10,313			18,460

1 Computed with considering derivatives hedging effect applied by the Group to hedge foreign exchange risk of liabilities in foreign currencies.

The above analysis is a simple sensitivity analysis which assumes that all the variables other than foreign exchange rates are held constant. Therefore, the analysis does not reflect any correlation between foreign exchange rates and other variables, nor the management’s decision to decrease the risk.

Details of financial assets and liabilities in foreign currencies as at December 31, 2021, 2022 and 2023, are as follows:

(In thousands of foreign currencies)	2021				2022				2023
	Financial assets		Financial liabilities		Financial assets		Financial liabilities		Financial assets		Financial liabilities
USD		245,759		2,302,642		106,426		2,336,607		139,807		2,271,673
SDR1		255		722		255		722		254		722
JPY		29,227		30,000,763		32,801		400,002		17,496		400,002
GBP		—		1,005		30		83		—		—
EUR		3,943		10,801		185		7,832		304		7,810
RWF2		586		—		15,521		13,025		402		—
THB3		2,160		—		265		—		244		—
TZS4		1,644		—		1,464		—		21,958		—
BWP5		93		—		183		—		680		—
HKD6		—		105		37		—		—		—
VND7		257,895		—		280,226		—		380,629		—
SGD8		13		284,000		448		284,000		1,375		—
TWD9		—		226		—		—		1,685		—
CHF10		—		161		—		—		—		25
MYR11		—		—		1		—		—		—
BGN12		—		—		62		—		—		—
PKR13		—		—		—		—		114,025		—

1 Special Drawing Rights.

2 Rwanda Franc.

3 Thailand Bhat.

4 Tanzanian Shilling.

5 Botswana Pula.

6 Hong Kong Dollar.

7 Vietnam Dong.

8 Singapore Dollar.

9 Taiwan Dollar.

10 Swiss Franc.

11 Ringgit Malaysia.

12 Bulgarian Lev.

13 Pakistani rupee

(iii) Price risk

As of December 31, 2021, 2022 and 2023, the Group is exposed to equity securities price risk because the securities held by the Group are traded in active markets. If the market prices had increased/decreased by 10% with all other variables held constant, the effects on profit before income tax and equity would have been as follows:

(in millions of Korean won)	Fluctuation of price	Impact on profit before income tax			Impact on equity
2021.12.31	10%	￦	2,000		￦	4,588
	-10%		(2,000	)		(4,588	)
2022.12.31	10%	￦	2,660		￦	113,948
	-10%		(2,660	)		(113,948	)
2023.12.31	10%	￦	1,473		￦	121,423
	-10%		(1,473	)		(121,423	)

The analysis above is based on the assumption that the equity index had increased/decreased by 10% with all other variables held constant and all the Group’s marketable equity instruments had moved according to the historical correlation with the index. Gain or loss on equity securities classified as financial assets at fair value through profit or loss and financial assets at fair value through other comprehensive income can increase or decrease equity.

(iv) Cash flow and fair value interest rate risk

The Group’s interest rate risk arises from liabilities in foreign currency such as foreign currency debentures. Debentures in foreign currency issued at variable rates expose the Group to cash flow interest rate risk which is partially offset by swap transactions. Debentures and borrowings issued at fixed rates expose the Group to fair value interest rate risk. The Group sets the policy and operates to minimize the uncertainty of the changes in interest rates and financial costs.

As of December 31, 2021, 2022 and 2023, if the market interest rate had increased/decreased by 100 bp with other variables held constant, the effects on profit before income tax and shareholders’ equity would be as follows:

(in millions of Korean won)	Fluctuation of interest rate		Impact on profit before income tax			Impact on equity
2021.12.31		+ 100 bp	￦	753		￦	5,549
		- 100 bp		(731	)		(5,675	)
2022.12.31		+ 100 bp	￦	635		￦	(2,045	)
		- 100 bp		(669	)		2,100
2023.12.31		+ 100 bp	￦	(2,693	)	￦	(4,718	)
		- 100 bp		2,696			5,037

The above analysis is a simple sensitivity analysis which assumes that all the variables other than market interest rates are held constant. Therefore, the analysis does not reflect any correlation between market interest rates and other variables, nor the management’s decision to decrease the risk.

2) Credit risk

Credit risk is the risk of financial loss to the Group if a customer or counterparty to a financial instrument fails to meet its contractual obligations and arises principally from the Group’s trade receivables from customers, debt securities and others.

- Risk management

Credit risk is managed on the Group basis with the purpose of minimizing financial loss. Credit risk arises from the normal transactions and investing activities, where clients or other party fails to discharge an obligation on contract conditions. To manage credit risk, the Group considers the counterparty’s credit based on the counterparty’s financial conditions, default history and other important factors.

Credit risk arises from cash and cash equivalents, derivative financial instruments and deposits with banks and financial institutions, as well as outstanding receivables. To minimize such risk, only the financial institutions with strong credit ratings are accepted.

The Group’s investments in debt instruments are considered to be low risk investments. The credit ratings of the investments are monitored for credit deterioration.

- Security

For some trade receivables, the Group may obtain security in the form of guarantees or letters of credit, etc. which can be called upon if the counterparty is in default under the terms of the agreement.

- Impairment of financial assets

The Group has four types of financial assets that are subject to the expected credit loss model:

• trade receivables for sales of goods and provision of services,

• contract assets relating to provision of services,

• debt investments carried at fair value through other comprehensive income, and

• other financial assets carried at amortized cost.

While cash equivalents are also subject to the impairment requirement, the identified expected credit loss was immaterial.

The maximum exposure to credit risk of the Group’s financial instruments without considering value of collaterals as of December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	December 31, 2022		December 31, 2023
Cash and cash equivalents (except for cash on hand)	￦	2,437,629	￦	2,869,285
Trade and other receivables
Financial assets at amortized costs		7,459,994		8,458,259
Financial assets at fair value through other comprehensive income		129,124		116,198
Contract assets		802,253		832,520
Other financial assets
Derivatives financial assets for hedging		190,830		159,211
Financial assets at fair value through profit or loss		942,274		880,549
Financial assets at fair value through other comprehensive income		5,432		5,913
Financial assets at amortized costs		1,060,058		1,385,921
Total	￦	13,027,594	￦	14,707,856

The Group is exposed to credit risk for financial guarantee contracts. As of December 31, 2023, the Group’s maximum exposure amount is ￦116,719 million (2022: ￦26,206 million).

(i) Trade receivables and contract assets

The Group applies the simplified approach to measuring expected credit losses which uses a lifetime expected loss allowance for all trade receivables and contract assets.

The Group measures the expected credit loss by considering the future unrecoverable rate of the remaining balance of trade receivables and other receivables at the end of the reporting period. Each trade receivables and other receivables are classified considering the credit risk characteristics and overdue periods in order to measure expected credit loss. The expected credit loss rate calculation is based on historical payment and credit loss information in relation to revenue for 36 months period up to December 31, 2023. Meanwhile, the credit sales assets of BC Card Co., Ltd., a subsidiary, were judged to have low credit risk, so the expected 12-month credit loss was applied.

The expected credit losses reflect forward-looking information. Provision for impairment as of December 31, 2022 and 2023, are as follows:

	December 31, 2022
(in millions of Korean won)	Less than 6 months			7-12 months			More than 1 years			Total
Expected credit loss rate		5.57	%		25.84	%		67.16	%		—
Total carrying amounts	￦	3,443,163		￦	49,491		￦	207,396		￦	3,700,050
Provision for impairment	￦	(191,668	)	￦	(12,789	)	￦	(139,281	)	￦	(343,738	)

	December 31, 2023
(in millions of Korean won)	Less than 6 months			7-12 months			More than 1 years			Total
Expected credit loss rate		5.43	%		21.72	%		54.55	%		—
Total carrying amounts	￦	3,466,588		￦	68,772		￦	235,129		￦	3,770,489
Provision for impairment	￦	(188,086	)	￦	(14,940	)	￦	(128,264	)	￦	(331,290	)

Details of changes in provisions for impairment of trade receivables the years ended December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	2022			2023
Beginning balance	￦	349,725		￦	343,738
Provision		64,522			69,972
Written-off		(68,298	)		(80,126	)
Others		(2,211	)		(2,294	)
Ending balance	￦	343,738		￦	331,290

As of December 31, 2023, the maximum exposure of the trade receivables carrying amount to credit risk is ￦3,439,199 million (2022: ￦3,356,312 million).

Impairment of trade receivable for the years ended December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	2022		2023
Impairment loss Bad debt expenses	￦	64,522	￦	69,972

(ii) Cash equivalents (except for cash on hand)

The Group is also exposed to credit risk in relation cash equivalents. The maximum exposure at the end of the reporting period is the carrying amount of these investments.

(iii) Other financial assets at amortized costs

Other financial assets at amortized cost include time deposits, other long-term financial instruments and others. All of the financial assets at amortized costs are considered to have low credit risk, and the loss allowance recognized during the period was, therefore, limited to 12 months expected losses. Management considers ‘low credit risk’ for other instruments when they have a low risk of default and the issuer has a strong capacity to meet its contractual cash flow obligations in the near term.

Details of changes in provisions for impairment of other financial assets at amortized costs for the years ended December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	2022			2023
Beginning balance	￦	201,387		￦	218,543
Provision		65,941			114,501
Written-off		(51,383	)		(150,014	)
Reversal		(850	)		(14,941	)
Others		3,448			15,547
Ending balance	￦	218,543		￦	183,636

(iv) Financial assets at fair value through other comprehensive income

All of the debt investments at fair value through other comprehensive income are considered to have low credit risk, and the loss allowance recognized during the period was, therefore, limited to 12 months expected losses. Managements consider ‘low credit risk’ for other instruments when they have a low risk of default and the issuer has a strong capacity to meet its contractual cash flow obligations in the near term. The maximum exposure at the end of the reporting period is the carrying amount of these investments.

(v) Financial assets at fair value through profit or loss

The Group is also exposed to credit risk in relation to financial assets that are measured at fair value through profit or loss. The maximum exposure at the end of the reporting period is the carrying amount of these investments.

3) Liquidity risk

The Group manages its liquidity risk by liquidity strategy and plans. The Group considers the maturity of financial assets and financial liabilities and the estimated cash flows from operations.

The table below analyzes the Group’s liabilities (including interest expenses) into relevant maturity groups based on the remaining period at the date of the end of each reporting period to the contractual maturity date. These amounts are contractual undiscounted cash flows and can differ from the amount in the consolidated financial statements.

	December 31, 2022
(in millions of Korean won)	Less than 1 year		1-5 years		More than 5 years		Total
Trade and other payables	￦	7,386,703	￦	1,009,559	￦	86,848	￦	8,483,110
Borrowings (including debentures)		2,028,207		6,972,077		2,016,472		11,016,756
Lease liabilities		313,162		615,766		407,833		1,336,761
Other non-derivative financial liabilities		33,279		209,155		93,744		336,178
Financial guarantee contracts1		21,618		—		4,588		26,206
Total	￦	9,782,969	￦	8,806,557	￦	2,609,485	￦	21,199,011

1 It is total amount guaranteed by the Group according to guarantee contracts. Cash flow from financial guarantee contracts is classified as the maturity group in the earliest period when the financial guarantee contracts can be executed.

	December 31, 2023
(in millions of Korean won)	Less than 1 year		1-5 years		More than 5 years		Total
Trade and other payables	￦	8,184,036	￦	730,340	￦	8,040	￦	8,922,416
Borrowings (including debentures)		2,922,557		6,027,323		1,743,842		10,693,722
Lease liabilities		313,431		617,561		409,174		1,340,166
Other non-derivative financial liabilities		372,743		747,221		10,073		1,130,037
Financial guarantee contracts1		13,719		103,000		—		116,719
Total	￦	11,806,486	￦	8,225,445	￦	2,171,129	￦	22,203,060

1 It is total amount guaranteed by the Group according to guarantee contracts. Cash flow from financial guarantee contracts is classified as the maturity group in the earliest period when the financial guarantee contracts can be executed.

At the end of the reporting period, the cash outflows and inflows by maturity of the Group’s derivatives held for trading and gross-settled derivatives are as follows:

	December 31, 2021
(in millions of Korean won)	Less than 1 year		1-5 years		More than 5 years		Total
Derivatives held for trading1
Outflows	￦	—	￦	158,284	￦	—	￦	158,284
Derivatives settled gross2
Outflows	￦	843,489	￦	1,857,942	￦	377,302	￦	3,078,733
Inflows		856,508		1,917,236		394,134		3,167,878

	December 31, 2022
(in millions of Korean won)	Less than 1 year		1-5 years		More than 5 years		Total
Derivatives held for trading1
Outflows	￦	—	￦	101,994	￦	930	￦	102,924
Derivatives settled gross2
Outflows	￦	472,005	￦	2,493,858	￦	28,786	￦	2,994,649
Inflows		550,478		2,670,002		37,873		3,258,353

	December 31, 2023
(in millions of Korean won)	Less than 1 year		1-5 years		More than 5 years		Total
Derivatives held for trading1
Outflows	￦	—	￦	133,293	￦	—	￦	133,293
Inflows		—		—		1,015		1,015
Derivatives settled gross2
Outflows	￦	741,140	￦	1,227,166	￦	8,126	￦	1,976,432
Inflows		614,066		2,198,958		36,344		2,849,368

1 During the year ended December 31, 2023, derivative liabilities held-for-trading are classified under the ‘more than one year to less than five years’ category as they are relevant to the fair value of derivatives liabilities related to shareholder-to-share contracts (Note 19).

As these derivatives held-for-trading are managed based on net fair value, their contractual maturities are not necessarily taking into consideration to understand the timing of cash flows.

2 Cash outflow and inflow of gross-settled derivatives are undiscounted contractual cash flow and may differ from the amount in the consolidated statement of financial position.

Meanwhile, as of December 31, 2023, the Group is obligated to invest ￦107,774 million in Kiamco Data Center Blind Fund, a related party, and others, and ￦4,132 million and USD 30,350 thousand to be paid in the future Capital Call method to Future Innovation Private Equity Fund No.3 (Notes 19 and 35).

(2) Management of Capital Risk

The Group’s objectives when managing capital are to safeguard the Group’s ability to continue as a going concern in order to provide returns for shareholders and benefits for other shareholders and to maintain an optimal capital structure to reduce the cost of capital.

The Group’s capital structure consists of liabilities including borrowings, cash and cash equivalents, and shareholders’ equity. The treasury department monitors the Group’s capital structure and considers cost of capital and risks related each capital component.

The debt-to-equity ratios as of December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	December 31, 2022			December 31, 2023
Total liabilities	￦	22,577,114		￦	24,249,073
Total equity		18,412,696			18,542,575
Debt-to-equity ratio		123	%		131	%

The Group manages capital on the basis of the gearing ratio. This ratio is calculated as net debt divided by total capital. Net debt is calculated as total borrowings less cash and cash equivalents. Total capital is calculated as ‘equity’ in the statement of financial position plus net debt.

The gearing ratios as of December 31, 2022 and 2023, are as follows:

(in millions of Korean won, %)	December 31, 2022			December 31, 2023
Total borrowings	￦	10,006,685		￦	10,218,165
Less: cash and cash equivalents		(2,449,062	)		(2,879,554	)
Net debt		7,557,623			7,338,611
Total equity		18,412,696			18,542,575
Total capital		25,970,319			25,881,186
Gearing ratio		29	%		28	%

(3) Offsetting Financial Assets and Financial Liabilities

1) Details of the Group’s recognized financial assets subject to enforceable master netting arrangements or similar agreements are as follows:

(in millions of Korean won)	December 31, 2022
	Gross assets		Gross liabilities offset			Net amounts presented in the statement of financial position		Amounts not offset					Net amount
								Financial instruments			Cash collateral
Trade receivables	￦	60,512	￦	—		￦	60,512	￦	(44,518	)	￦	—	￦	15,994
Other financial assets		764		(764	)		—		—			—		—
Total	￦	61,276	￦	(764	)	￦	65,012	￦	(44,518	)	￦	—	￦	15,994

(in millions of Korean won)	December 31, 2023
	Gross assets		Gross liabilities offset			Net amounts presented in the statement of financial position		Amounts not offset					Net amount
								Financial instruments			Cash collateral
Trade receivables	￦	78,415	￦	(1,407	)	￦	77,008	￦	(59,148	)	￦	—	￦	17,860
Other financial assets		759		(757	)		2		(2	)		—		—
Total	￦	79,174	￦	(2,164	)	￦	77,010	￦	(59,150	)	￦	—	￦	17,860

These include price subject to netting arrangements on facility interconnection and data sharing among telecommunication companies.

2) The Group’s recognized financial liabilities subject to enforceable master netting arrangements or similar agreements are as follows:

(in millions of Korean won)

December 31, 2022

Gross liabilities

Gross assets offset

Net amounts presented in the statement of financial position

Amounts not offset

Net amount

Financial instruments

Cash collateral

Trade payables

￦

47,271

￦

(764

)

￦

46,507

￦

(44,518

)

￦

—

￦

1,989

(in millions of Korean won)	December 31, 2023
	Gross liabilities		Gross assets offset			Net amounts presented in the statement of financial position		Amounts not offset					Net amount
								Financial instruments			Cash collateral
Trade payables	￦	59,602	￦	(757	)	￦	58,845	￦	(56,196	)	￦	—	￦	2,649
Other financial assets		4,362		(1,407	)		2,955		(2,955	)		—		—
Total	￦	63,964	￦	(2,164	)	￦	61,800	￦	(59,151	)	￦	—	￦	2,649

These include price subject to netting arrangements on facility interconnection and data sharing among telecommunication companies.

XML

Fair Value

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Fair Value

37. Fair Value

(1) Fair Value of Financial Instruments by Category

Carrying amount and fair value of financial instruments by category as of December 31, 2022 and 2023, are as follows:

	December 31, 2022				December 31, 2023
(in millions of Korean won)	Carrying amount		Fair value		Carrying amount		Fair value
Financial assets
Cash and cash equivalents	￦	2,449,062		1	￦	2,879,554		1
Trade and other receivables
Financial assets measured at amortized cost2		7,364,516		1		8,326,229		1
Financial assets at fair value through other comprehensive income		129,124		129,124		116,198		116,198
Other financial assets
Financial assets measured at amortized cost		1,060,058		1		1,385,921		1
Financial assets at fair value through profit or loss		1,064,856		1,064,856		939,661		939,661
Financial assets at fair value through other comprehensive income		1,508,192		1,508,192		1,680,168		1,680,168
Derivative financial assets for hedging		190,830		190,830		159,211		159,211
Total	￦	13,766,638			￦	15,486,942
Financial liabilities
Trade and other payables3	￦	8,397,264		1	￦	8,317,822		1
Borrowings		10,006,685		9,405,992		10,218,165		9,979,545
Other financial liabilities
Financial liabilities at amortized cost		246,606		1		915,185		1
Financial liabilities at fair value through profit or loss		141,280		141,280		136,106		136,106
Derivative financial liabilities for hedging purpose		33,555		33,555		24,547		24,547
Total	￦	18,825,390			￦	19,611,825

1 The Group did not conduct fair value estimation since the book amount is a reasonable approximation of the fair value.

2 Lease receivables are excluded from fair value disclosure in accordance with IFRS 7.

3 Amounts related to employee benefit plans are included in trade and other payables at the end of previous year.

(2) Fair Value Hierarchy

To provide an indication about the reliability of the inputs used in determining fair value, the Group classifies its financial instruments into the three levels prescribed under the accounting standards. Financial instruments that are measured at fair value are categorized by the fair value hierarchy, and the defined levels are as follows:

• Level 1: The fair value of financial instruments traded in active markets is based on quoted market prices at the end of the reporting period. The quoted market price used for financial assets held by the Group is the current bid price. These instruments are included in level 1.

• Level 2: The fair value of financial instruments that are not traded in active markets is determined using valuation techniques which maximize the use of observable market data and rely as little as possible on entity-specific estimates. If all significant inputs required to fair value an instrument are observable, the instrument is included in level 2.

• Level 3: If one or more of the significant inputs is not based on observable market data, the instrument is included in level 3.

Fair value hierarchy classifications of the financial assets and financial liabilities that are measured at fair value disclosed in fair value as of December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	December 31, 2022
	Level 1		Level 2		Level 3		Total
Assets
Trade and other receivables
Financial assets at fair value through other comprehensive income	￦	—	￦	129,124	￦	—	￦	129,124
Other financial assets
Financial assets at fair value through profit or loss		26,647		426,140		612,069		1,064,856
Financial assets at fair value through other comprehensive income		1,005,900		5,163		497,129		1,508,192
Derivative financial assets for hedging		—		189,717		1,113		190,830
Investment properties		—		—		5,370,047		5,370,047
Total	￦	1,032,547	￦	750,144	￦	6,480,358	￦	8,263,049
Liabilities
Borrowings	￦	—	￦	9,405,992	￦	—	￦	9,405,992
Other financial liabilities
Financial liabilities at fair value through profit or loss		—		—		141,280		141,280
Derivative financial liabilities for hedging purpose		—		33,555		—		33,555
Total	￦	—	￦	9,439,547	￦	141,280	￦	9,580,827

(in millions of Korean won)	December 31, 2023
	Level 1		Level 2		Level 3		Total
Assets
Trade and other receivables
Financial assets at fair value through other comprehensive income	￦	—	￦	116,198	￦	—	￦	116,198
Other financial assets
Financial assets at fair value through profit or loss		13,911		156,918		768,832		939,661
Financial assets at fair value through other comprehensive income		1,230,936		5,206		444,026		1,680,168
Derivative financial assets for hedging		—		159,211		—		159,211
Investment properties		—		—		5,276,169		5,276,169
Total	￦	1,244,847	￦	437,533	￦	6,489,027	￦	8,171,407
Liabilities
Borrowings	￦	—	￦	9,979,545	￦	—	￦	9,979,545
Other financial liabilities
Financial liabilities at fair value through profit or loss		—		1,545		134,561		136,106
Derivative financial liabilities for hedging purpose		—		24,547		—		24,547
Total	￦	—	￦	10,005,637	￦	134,561	￦	10,140,198

(3) Transfers Between Fair Value Hierarchy Levels of Recurring Fair Value Measurements

1) Details of transfers between Level 1 and Level 2 of the fair value hierarchy for recurring fair value measurements

There are no transfers between Level 1 and Level 2 of the fair value hierarchy for the recurring fair value measurements.

2) Details of changes in Level 3 of the fair value hierarchy for recurring fair value measurements.

Details of changes in Level 3 of the fair value hierarchy for the recurring fair value measurements as of December 31, 2022 and 2023, are as follows:

	2022
	Financial assets						Financial liabilities
(in millions of Korean won)	Financial assets at fair value through profit or loss			Financial assets at fair value through other comprehensive income			Derivative financial assets for hedging		Financial liabilities at fair value through profit or loss
Beginning balance	￦	577,085		￦	323,373		￦	31,565	￦	215,332
Acquisition		226,310			262,408			—		3,046
Reclassification		(8,962	)		8,122			—		(54,921	)
Acquisition and disposition of businesses		—			(40	)		—		—
Disposal		(179,740	)		(97,426	)		(31,565)		—
Amount recognized in profit or loss1		(2,624	)		18			—		(22,177	)
Amount recognized in other comprehensive income2		—			674			1,113		—
Ending balance	￦	612,069		￦	497,129		￦	1,113	￦	141,280

1 The recognition of gains and losses on derivatives financial liabilities (assets) for hedging purposes consists entirely of derivatives valuation losses.

2 The recognition of gains and losses on financial liabilities measured at fair value through profit or loss consists of derivative valuation losses.

	2023
	Financial assets						Financial liabilities
(in millions of Korean won)	Financial assets at fair value through profit or loss			Financial assets at fair value through other comprehensive income			Derivative financial assets for hedging		Financial liabilities at fair value through profit or loss
Beginning balance	￦	612,069		￦	497,129		￦	1,113	￦	141,280
Acquisition		216,838			10,267			—		—
Reclassification		26,471			(5,532	)		(1,113)		(7,363	)
Acquisition and disposition of businesses		252			—			—		—
Disposal		(44,323	)		(6	)		—		(5,205	)
Amount recognized in profit or loss 1,		(42,475	)		(61	)		—		5,849
Amount recognized in other comprehensive income		—			(57,771	)		—		—
Ending balance	￦	768,832		￦	444,026		￦	—	￦	134,561

1 The recognition of gains and losses on financial liabilities measured at fair value through profit or loss consists of derivative valuation gains and losses.

(4) Valuation Technique and the Inputs

Valuation techniques and inputs used in the recurring, non-recurring fair value measurements and disclosed fair values categorized within Level 2 and Level 3 of the fair value hierarchy as of December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	December 31, 2022
	Fair value		Level		Valuation techniques	Inputs
Assets
Trade and other receivables
Financial assets at fair value through other comprehensive income	￦	129,124		2	DCF Model	Guaranteed bond interest rate
Other financial assets
Financial assets at fair value through profit or loss		1,038,209		2,3	DCF Model, Adjusted Net Asset Model, Monte-Carlo Simulation	Market Interest rate, Underlying asset price
Financial assets at fair value through other comprehensive income		502,292		2,3	DCF Model, Market Approach Model	Discount rate
Derivative financial assets for hedging		190,830		2,3	DCF Model	Market observation discount rate, Swap interest rate
Investment properties		5,370,047		3	DCF Model
Liabilities
Borrowings	￦	9,405,992		2	DCF Model	Bond interest rate
Other financial liabilities
Financial liabilities at fair value through profit or loss		141,280		3	DCF Model, Binomial Option Pricing Model, Monte-Carlo Simulation	Forward exchange rate Forward interest rate
Derivative financial liabilities for hedging		33,555		2	DCF Model	Market observation discount rate

(in millions of Korean won)	December 31, 2023
	Fair value		Level		Valuation techniques	Inputs
Assets
Trade and other receivables
Financial assets at fair value through other comprehensive income	￦	116,198		2	DCF Model	Guaranteed bond interest rate
Other financial assets
Financial assets at fair value through profit or loss		925,750		2,3	DCF Model, Adjusted Net Asset Model, Monte-Carlo Simulation	Market Interest rate, Underlying asset price
Financial assets at fair value through other comprehensive income		449,232		2,3	DCF Model, Market Approach Model	Discount rate
Derivative financial assets for hedging		159,211		2	DCF Model	Market observation discount rate, Swap interest rate
Investment properties		5,276,169		3	DCF Model
Liabilities
Borrowings	￦	9,979,545		2	DCF Model	Bond interest rate
Other financial liabilities
Financial liabilities at fair value through profit or loss		136,106		2,3	DCF Model, Binomial Option Pricing Model,	Forward exchange rate Forward interest rate
Derivative financial liabilities for hedging		24,547		2	DCF Model	Market observation discount rate

(5) Valuation Processes for Fair Value Measurements Categorized Within Level 3

The Group uses external experts that perform the fair value measurements required for financial reporting purposes. External experts report directly to the chief financial officer (CFO) and discuss the valuation processes and results with the CFO in line with the Group’s closing dates.

(6) Gains and losses on valuation at the transaction date

In the case that the Group values derivative financial instruments using inputs not based on observable market data, and the fair value calculated by the said valuation technique differs from the transaction price, then the fair value of the financial instruments is recognized as the transaction price. The difference between the fair value at initial recognition and the transaction price is deferred and amortized using a straight-line method by maturity of the financial instruments. However, in the case that inputs of the valuation techniques become observable in markets, the remaining deferred difference is immediately recognized in full in profit or loss.

In relation to this, details and changes of the total deferred difference for the years ended December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	2022			2023
	Derivatives used for hedging			Derivatives used for hedging
I. Beginning balance	￦	832		￦	—
II. New transactions		—			—
III. Recognized at fair value through profit or loss		(832	)		—
IV. Ending balance (I+II+III)	￦	—		￦	—

XML

Interests in Unconsolidated Structured Entities

12 Months Ended

Dec. 31, 2023

Investments accounted for using equity method [abstract]

Interests in Unconsolidated Structured Entities

38. Interests in Unconsolidated Structured Entities

(1) Details of information about its interests in unconsolidated structured entities, which the Group does not have control over, including the nature, purpose and activities of the structured entity and how the structured entity is financed, are as follows:

Classes of entities	Nature, purpose, activities and others
Real estate finance	A structured entity incorporated for the purpose of real estate development is provided with funds by investors’ investments in equity and borrowings from financial institutions (including long-term and short-term loans and issuance of Asset Backed Commercial Paper (“ABCP”) due in three months), and based on these, the structured entity implements activities such as real estate acquisition, development and mortgage loans. The structured entity repays loan principals with funds incurred from instalment house sales after the completion of real estate development or with collection of the principal of mortgage loan. The remaining shares are distributed to investors. As of December 31, 2023, this entity is engaged in real estate finance structured entity and generates revenues by receiving dividends from direct investments in or receiving interests on loans to the structured entity. Financial institutions, including the Entity, are provided with guarantees including joint guarantees or real estate collateral from investors and others. Consequently, the entity is a priority over other parties in the preservation of claim. However, when the credit rating of investors and others decreases or when the value of real estate decreases, the entity may be obliged to cover losses.
PEF and investment funds	Minority investors including managing members contribute to Private Equity Fund (“PEF”) and investment funds incorporated for the purpose of providing funds to the small, medium, or venture entities, and the managing member implements activities such as investments in equity or loans based on the contributions. As of December 31, 2023, the entity is engaged in PEF and investment funds structured entity, and after contributing to PEF and investment funds, the entity receives dividends for operating revenues from these contributions. The entity is provided with underlying assets of PEF and investment funds as collateral. However, when the value of the underlying assets decreases, the entity may be obliged to cover losses.
Asset securitization	The Group transfers accounts receivable for handset sales to its Special Purpose Company (“SPC”) for asset securitization. SPC issues the asset-backed securities with accounts receivable for handset sales as an underlying asset and makes payment for the underlying asset acquired.

(2) Details of scale of unconsolidated structured entities and nature of the risks associated with an entity’s interests in unconsolidated structured entities as of December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	December 31, 2022
	Real Estate Finance		PEF and Investment Funds		Asset Securitization		Total
Total assets of unconsolidated structured entities	￦	3,539,827	￦	5,580,445	￦	2,044,989	￦	11,165,261
Assets recognized in statement of financial position
Other financial assets	￦	77,819	￦	237,907	￦	—	￦	315,726
Joint ventures and associates		123,138		268,275		—		391,413
Total	￦	200,957	￦	506,182	￦	—	￦	707,139
Maximum loss exposure1
Investment assets	￦	200,957	￦	506,182	￦	—	￦	707,139
Investment agreement and others2		40,914		91,224		—		132,138
Total	￦	241,871	￦	597,406	￦	—	￦	839,277

1 Includes the investments recognized in the Group’s financial statements and the amounts which are probable to be determined when certain conditions are met.

2 Investment agreements and others include purchase agreements, credit granting and others.

(in millions of Korean won)	December 31, 2023
	Real Estate Finance		PEF and Investment Funds		Asset Securitization		Total
Total assets of unconsolidated structured entities	￦	7,890,823	￦	4,833,966	￦	1,846,270	￦	14,571,059
Assets recognized in statement of financial position
Other financial assets	￦	216,040	￦	227,266	￦	—	￦	443,306
Joint ventures and associates		144,517		282,550		—		427,067
Total	￦	360,557	￦	509,816	￦	—	￦	870,373
Maximum loss exposure 1
Investment assets	￦	360,557	￦	509,816	￦	—	￦	870,373
Investment agreement and others 2		44,975		106,064		—		151,039
Total	￦	405,532	￦	615,880	￦	—	￦	1,021,412

1 Includes the investments recognized in the Group’s financial statements and the amounts which are probable to be determined when certain conditions are met.

2 Investment agreements and others include purchase agreements, credit granting and others.

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Information About Non-controlling Interests

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Information About Non-controlling Interests

39. Information About Non-controlling Interests

(1) Changes in Accumulated Non-controlling Interests

Profit or loss allocated to non-controlling interests and accumulated non-controlling interests of subsidiaries that are material to the Group for the years ended December 31, 2021, 2022 and 2023 are as follows:

(In millions of Korean won)	December 31, 2021
	Non- controlling Interests rate (%)			Accumulated non-controlling interests at the beginning of the year		Profit or loss allocated to non-controlling interests		Dividends paid to non- controlling interests			Others			Accumulated non-controlling interests at the end of the year
KT Skylife Co., Ltd.		49.7	%	￦	388,900	￦	24,795	￦	(8,279	)	￦	5,279		￦	410,695
BC Card Co., Ltd.		30.5	%		411,826		34,496		(6,434	)		59,040			498,928
KTIS Corporation		68.6	%		120,071		17,715		(1,837	)		(709	)		135,240
KTCS Corporation		79.7	%		129,502		21,394		(2,211	)		(3,574	)		145,111
Nasmedia, Co., Ltd.		56.0	%		112,549		15,185		(3,808	)		255			124,181

(In millions of Korean won)	December 31, 2022
	Non- controlling Interests rate (%)			Accumulated non-controlling interests at the beginning of the year		Profit or loss allocated to non-controlling interests		Dividends paid to non- controlling interests			Others			Accumulated non-controlling interests at the end of the year
KT Skylife Co., Ltd.		49.8	%	￦	410,695	￦	7,127	￦	(8,284	)	￦	13,651		￦	423,189
BC Card Co., Ltd.		30.5	%		498,928		47,909		(7,641	)		(14,539	)		524,657
KTIS Corporation		66.7	%		135,240		14,965		(2,226	)		(6,577	)		141,402
KTCS Corporation		78.3	%		145,111		18,888		(2,721	)		(7,397	)		153,881
Nasmedia, Co., Ltd.		56.0	%		124,181		15,610		(4,187	)		(179	)		135,425

(In millions of Korean won)	December 31, 2023
	Non- controlling Interests rate (%)			Accumulated non-controlling interests at the beginning of the year		Profit or loss allocated to non-controlling interests			Dividends paid to non- controlling interests			Others			Accumulated non-controlling interests at the end of the year
KT Skylife Co., Ltd.		49.4	%	￦	423,189	￦	(47,355	)	￦	(8,287	)	￦	(6,192	)	￦	361,355
BC Card Co., Ltd.		30.5	%		524,657		25,355			(4,960	)		3,023			548,075
KTIS Corporation		66.7	%		141,402		5,947			(2,451	)		(1,872	)		143,026
KTCS Corporation		78.3	%		153,881		14,228			(3,001	)		(2,313	)		162,795
Nasmedia Co., Ltd		55.9	%		135,425		10,679			(4,028	)		(467	)		141,609

 

(2) Summarized Financial Information on Subsidiaries

The summarized financial information for each subsidiary with non-controlling interests that are material to the Group, before inter-company eliminations, is as follows:

	December 31, 2022
(in millions of Korean won)	KT Skylife Co., Ltd.		BC Card Co., Ltd.		KTIS Corporation		KTCS Corporation		Nasmedia, Co., Ltd.
Current assets	￦	420,701	￦	3,152,622	￦	102,121	￦	296,209	￦	435,359
Non-current assets		938,465		2,513,453		294,087		123,517		81,586
Current liabilities		274,637		2,879,551		103,698		188,379		261,381
Non-current liabilities		229,042		1,229,649		95,506		40,240		14,349
Equity		855,487		1,556,875		197,004		191,107		241,215
	December 31, 2023
(in millions of Korean won)	KT Skylife Co., Ltd.		BC Card Co., Ltd.		KTIS Corporation		KTCS Corporation		Nasmedia, Co., Ltd.
Current assets	￦	425,661	￦	3,739,847	￦	111,313	￦	304,508	￦	411,774
Non-current assets		795,182		2,613,031		336,296		130,391		101,537
Current liabilities		353,839		3,661,263		116,271		187,621		251,207
Non-current liabilities		125,531		1,061,169		127,248		47,228		11,129
Equity		741,473		1,630,446		204,090		200,050		250,975

Summarized consolidated statements of comprehensive income for the years ended December 31, 2021,2022 and 2023 are as follows:

	2021
(in millions of Korean won)	KT Skylife Co., Ltd.		BC Card Co., Ltd.			KTIS Corporation			KTCS Corporation			Nasmedia, Co., Ltd.
Operating revenue	￦	772,950	￦	3,580,970		￦	487,801		￦	968,499		￦	125,876
Profit for the year		62,309		120,308			24,944			19,034			27,120
Other comprehensive income (loss)		12,686		2,270			3,725			(2,120	)		871
Total comprehensive income		74,995		122,578			28,669			16,914			27,991
	2022
(in millions of Korean won)	KT Skylife Co., Ltd.		BC Card Co., Ltd.			KTIS Corporation			KTCS Corporation			Nasmedia, Co., Ltd.
Operating revenue	￦	1,038,468	￦	3,897,090		￦	536,229		￦	1,031,010		￦	153,210
Profit for the year		20,941		148,341			15,917			17,634			27,691
Other comprehensive income (loss)		13,544		(5,286	)		(2,415	)		(134	)		(695	)
Total comprehensive income		34,485		143,055			13,502			17,500			26,996

	2023
(in millions of Korean won)	KT Skylife Co., Ltd.			BC Card Co., Ltd.		KTIS Corporation			KTCS Corporation			Nasmedia, Co., Ltd.
Operating revenue	￦	1,034,342		￦	4,027,450	￦	593,162		￦	1,035,911		￦	147,934
Profit for the year		(109,407	)		76,545		13,922			15,804			17,703
Other comprehensive income (loss)		(6,625	)		13,832		(3,162	)		(2,550	)		(1,890	)
Total comprehensive income		(116,032	)		90,377		10,760			13,254			15,813

Summarized consolidated statements of cash flows for the years ended December 31, 2021,2022 and 2023 are as follows:

	2021
(in millions of Korean won)	KT Skylife Co., Ltd.			BC Card Co., Ltd.			KTIS Corporation			KTCS Corporation			Nasmedia, Co., Ltd.
Cash flows from operating activities	￦	102,947		￦	(157,645	)	￦	49,011		￦	6,945		￦	44,500
Cash flows from investing activities		(352,116	)		(283,313	)		(27,143	)		(1,039	)		(16,966	)
Cash flows from financing activities		230,010			526,563			(23,126	)		(16,622	)		(9,843	)
Net increase (decrease) in cash and cash equivalents		(19,159	)		85,605			(1,258	)		(10,716	)		17,691
Cash and cash equivalents at beginning of year		99,834			240,584			31,779			75,440			53,720
Exchange differences		(3	)		293			—			(840	)		(15	)
Cash and cash equivalents at end of the year		80,672			326,482			30,521			63,884			71,396

	2022
(in millions of Korean won)	KT Skylife Co., Ltd.			BC Card Co., Ltd.			KTIS Corporation			KTCS Corporation			Nasmedia, Co., Ltd.
Cash flows from operating activities	￦	176,407		￦	(798,043	)	￦	13,809		￦	19,423		￦	22,015
Cash flows from investing activities		(78,928	)		(7,733	)		9,813			13,245			3,845
Cash flows from financing activities		(79,455	)		914,441			(29,199	)		(35,578	)		(11,136	)
Net increase (decrease) in cash and cash equivalents		18,024			108,665			(5,577	)		(2,910	)		14,724
Cash and cash equivalents at beginning of year		80,672			326,482			30,521			63,884			71,396
Exchange differences		(1	)		(100	)		—			840			13
Cash and cash equivalents at end of the year		98,695			435,047			24,944			61,814			86,133

	2023
(in millions of Korean won)	KT Skylife Co., Ltd.			BC Card Co., Ltd.			KTIS Corporation			KTCS Corporation			Nasmedia, Co., Ltd.
Cash flows from operating activities	￦	207,207		￦	82,883		￦	50,892		￦	55,146		￦	8,116
Cash flows from investing activities		(125,343	)		(74,430	)		(17,636	)		(5,901	)		(30,910	)
Cash flows from financing activities		(50,811	)		(67,609	)		(32,872	)		(26,948	)		(11,077	)
Net increase (decrease) in cash and cash equivalents		31,053			(59,156	)		384			22,297			(33,871	)
Cash and cash equivalents at beginning of year		98,695			435,047			24,944			61,814			86,133
Exchange differences		—			(95	)		—			—			15
Cash and cash equivalents at end of the year		129,748			375,796			25,328			84,111			52,277

(3) Transactions with Non-controlling Interests

The effect of changes in the ownership interest on the equity attributable to owners of the Group for the years ended December 31, 2021, 2022 and 2023 is summarized as follows:

(in millions of Korean won)	2021		2022		2023
Carrying amount of non-controlling interests acquired	￦	14,702	￦	19,272	￦	3,022
Consideration paid to non-controlling interests		1,095		69,652		213,819
Effect of changes in equity (net amount)	￦	15,797	￦	88,924	￦	216,841

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Events After the Reporting Period

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Events After the Reporting Period

40. Events After the Reporting Period

(1) The Company has decided to acquire treasury stocks (￦27,100 million) in accordance with a resolution of the Board of Directors dated February 7, 2024, to enhance shareholder value. The acquired treasury stocks (695,775 shares) were retired in March 25, 2024.

(2) The company issued the following bonds after the end of the reporting period (unit: ￦ million).

Type	Issued Date		Annual interest rates			Maturity		Korean won
The 200-1st Public bond		Feb. 27, 2024		3.552	%		Feb. 27, 2026-		120,000
The 200-2nd Public bond		Feb. 27, 2024		3.608	%		Feb. 26, 2027-		200,000
The 200-3rd Public bond		Feb. 27, 2024		3.548	%		Feb. 27, 2029-		80,000

XML

Material Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Basis of Preparation

2.1 Basis of Preparation

The consolidated financial statements of the Group have been prepared in accordance with International Financial Reporting Standards (“IFRS”) as issued by the International Accounting Standards Board (“IASB”).

The financial statements have been prepared on a historical cost basis, except for the following:

• Certain financial assets and liabilities (including derivative instruments)

• Defined benefit pension plans – plan assets measured at fair value

The preparation of the consolidated financial statements requires the use of critical accounting estimates. Management also needs to exercise judgement in applying the Group’s accounting policies. The areas involving a higher degree of judgment or complexity, or areas where assumptions and estimates are significant to the consolidated financial statements are disclosed in Note 3.

Changes in Accounting Policy and Disclosures

2.2 Changes in Accounting Policy and Disclosures

(a) New and amended standards and interpretations adopted by the Group

The Group has applied the following standards and interpretations for the first time for their annual reporting period commencing January 1, 2023.

- IFRS 17 ‘Insurance Contract’ (Amendment)

IFRS 17, which replaces IFRS 4 “Insurance Contracts,” establishes principles for recognition, measurement, and disclosure of insurance contracts, and is mainly characterized by measuring the current cost of insurance liabilities, recognizing insurance returns based on accrual accounting assumption, and marking the distinction between insurance gains and losses on investment.

The Group does not have any contracts that meet the definition of an insurance contract under IFRS 17.

- IAS 1 Presentation of Financial Statements and IFRS Practice Statement 2 Making Materiality Judgements – Disclosure of Accounting Policies (Amendment)

The amendments change the requirements in IAS 1 with regard to disclosure of accounting policies. The amendments replace all instances of the term ‘significant accounting policies’ with ‘material accounting policy information’. Accounting policy information is material if, when considered together with other information included in an entity’s financial statements, it can reasonably be expected to influence decisions that the primary users of general purpose financial statements make on the basis of those financial statements.

The supporting paragraphs in IAS 1 are also amended to clarify that accounting policy information that relates to immaterial transactions, other events or conditions is immaterial and need not be disclosed. Accounting policy information may be material because of the nature of the related transactions, other events or conditions, even if the amounts are immaterial. However, not all accounting policy information relating to material transactions, other events or conditions is itself material.

The IASB has also developed guidance and examples to explain and demonstrate the application of the ‘four-step materiality process’ described in IFRS Practice Statement 2.

- IAS 1 Presentation of Financial Statements – Disclosure of financial liabilities with condition to adjust exercise price (Amendment)

The amendments require disclosure of valuation gains or losses (limited to those recognized in the profit or loss) of the conversion options or warrants (or financial liabilities including them), if all or part of the financial instrument with exercise price that is adjusted depending on the issuer’s share price change is classified as financial liability as defined in paragraph of IAS 32 – Financial Instrument: Presentation.

- IAS 8 Accounting Polices, Changes in Accounting Estimates and Errors – Definition of Accounting Estimates (Amendment)

The amendments replace the definition of a change in accounting estimates with a definition of accounting estimates. Under the new definition, accounting estimates are “monetary amounts in financial statements that are subject to measurement uncertainty”. The definition of a change in accounting estimates was deleted.

- IAS 12 Income Taxes – Deferred Tax related to Assets and Liabilities arising from a Single Transaction (Amendment)

The amendments introduce a further exception from the initial recognition exemption. Under the amendments, an entity does not apply the initial recognition exemption for transactions that give rise to equal taxable and deductible temporary differences.

Depending on the applicable tax law, equal taxable and deductible temporary differences may arise on initial recognition of an asset and liability in a transaction that is not a business combination and affects neither accounting nor taxable profit. For example, this may arise upon recognition of a lease liability and the corresponding right-of-use asset applying IFRS 16 at the commencement date of a lease.

Following the amendments to IAS 12, an entity is required to recognise the related deferred tax asset and liability, with the recognition of any deferred tax asset being subject to the recoverability criteria in IAS 12.

- IAS 12 Income Taxes – International Tax Reform: Pillar 2 Best Regulations (Amendment)

The amendment clarifies that IAS 12 Income Taxes’ is applied to corporations arising from tax laws enacted or practically enacted to implement the Pillar 2 best rules issued by the Organization for Economic Cooperation and Development (OECD).

However, by introducing a temporary exception to the deferred tax accounting requirements of IAS 12 Income Taxes, the group does not recognize deferred tax assets and liabilities associated with Pillar 2 Income Taxes and do not disclose information about them. The group also discloses that the exception has been applied in accordance with this amendment, and that the current income tax expense (revenue) related to Pillar 2 corporate tax is disclosed separately.

There is no significant impact of the amendments listed above on the consolidated financial statements.

(b) New standards and interpretations not yet adopted by the Group

The following new accounting standards and interpretations that have been published are not mandatory for December 31, 2023 reporting periods and have not been early adopted by the Group.

- IAS 1 Presentation of Financial Statements – Classification of Liabilities as Current or Non-current (Amendment to 2020)

The amendments clarify that the classification of liabilities as current and non-current is based on rights that are existing at the end of the reporting period, specify that classification is unaffected by expectations about whether an entity will exercise its right to defer settlement of a liability, explain that rights are in existence if covenants are complied with at the end of the reporting period, and introduce a definition of ‘settlement’ to make clear that settlement refers to the transfer to the counterparty of cash, equity instruments, other assets or services.

- IAS 1 Presentation of Financial Statements – Non-current liabilities with agreements (Amendment to 2023)

The amendments regulate that only certain conditions in the borrowing arrangement (referred to as the “Agreement”) that must be observed before the end of the reporting period affect the right of the entity to defer repayment of the liability for at least 12 months after the reporting period. Even if compliance with the agreement is assessed only after the reporting period, these arrangements affect the existence of the right as of the end of the reporting period.

It also regulates that arrangements that must be observed only after the reporting period do not affect the right to defer settlement. However, if the Group’s right to defer settlement of a liability depends on the agreement that complies with within 12 months of the reporting period, disclosing the information to help users of financial statements understand the risk that the liability could be repaid within 12 months of the reporting period. This information includes information about the agreements (including the nature of the agreements, when the Group is required to comply), the carrying amount of the relevant liabilities, and the facts and circumstances indicating that they may be difficult to satisfying with.

The above amendments are applied retrospectively for annual reporting periods beginning on or after 1 January 2024, with early application permitted.

- IAS 7 ‘Cash Flow Statement’ and ‘Financial Instruments Disclosure’- Supplier Financial Agreement(Amendment)

The amendment adds the purpose of disclosure in IAS 7 ‘Cash Flow Statement’, users of financial statements should disclose information about supplier financial agreements so that they can assess the affect of them on the Group’s liabilities and cash flows. In addition, supplier financial agreements were added as an example of the requirement to amend IAS 7 to disclose information about exposure to liquidity risk concentration.

The term ‘supplier financial agreements’ is not defined; instead, the amendment presents the nature of the arrangement that should be informed.

For achieving the purpose of disclosure, the following information on supplier financial agreements must be disclosed in an integrated manner.

• the terms and conditions of an agreement

• The carrying amount of financial liabilities corresponding to the supplier’s financial agreement and the items displayed in the statement of financial position in relation to the financial liabilities

• The carrying amount corresponding to the portion of the financial liabilities that the supplier has already received from the financial provider and the items displayed in the statement of financial position in relation to the financial liabilities

• The scope of payment date for financial liabilities corresponding to supplier financial agreements and the scope of payment date for comparable purchase liabilities not corresponding to supplier financial agreements

• Types of non-cash changes in the carrying amount of financial liabilities corresponding to supplier financial agreements and their impact

• Liquidity risk information

The above amendments are applied retrospectively for annual reporting periods beginning on or after 1 January 2024, with early application permitted.

- IFRS 16 ‘Lease’ – Lease liabilities arising from leaseback (Amendment)

The amendment adds a follow-up measurement requirement for leaseback that is accounted for as sales by applying IFRS 15 ‘revenue from contracts with customers’. The amendment requires the seller to calculate a ‘lease fee’ or an ‘modified lease fee’ in such a way that the seller-less user does not recognize any difference or gain for the right to use that the seller-less user continues to hold after the lease commencement date.

The above amendments are applied retrospectively for annual reporting periods beginning on or after 1 January 2024, with early application permitted.

- IAS 1 Presentation of Financial Statements (revised in 2023) – Disclosure of Virtual Assets

The amendments, in addition to the disclosure requirements required by other Standards for transactions related to virtual assets, define the requirements for disclosure in each case: 1) holding virtual assets; 2) holding virtual assets on behalf of customers; and 3) issuing virtual assets.

If a virtual asset is held, information on the general information of the virtual asset, the applied accounting policy, the acquisition path, acquisition cost, and fair value of each virtual asset should be disclosed. In addition, when a virtual asset is issued, the performance status related to the issued virtual asset, the moment and the exposure of revenue recognition of the sold virtual asset, the quantity of virtual assets held after issuance, and important contract details should be disclosed.

The above amendments are applied retrospectively for annual reporting periods beginning on or after 1 January 2024, with early application permitted.

- IFRS 18 Presentation and Disclosure in financial statements (Amendment)

The purpose of the amendment is to set out requirements for the presentation and disclosure of information in general purpose financial statements (financial statements) to help ensure they provide relevant information that faithfully represents an entity’s assets, liabilities, equity, income and expenses. IFRS 18 applies to all financial statements that are prepared and presented in accordance with International Financial Reporting Standards and replaces IAS 1 Presentation of Financial Statements. The key changes included in the amendments include (1) an introduction of a defined structure for the statement of profit or loss including categories for classifying incomes and expenses, subtotals for operating profit and profit before financing and income taxes, (2) an introduction of specific disclosure requirements related to the statement of profit or loss which include but are not limited to management-defined performance measures, (3) enhanced guidance on the principles of aggregation and disaggregation which focus on grouping items based on their shared characteristics and (4) some other limited changes to presentation and disclosures in the financial statements.

The above amendments are applied retrospectively for annual reporting periods beginning on or after 1 January 2027, with early application permitted.

The Group is reviewing the impact of the above-listed amendments on the consolidated financial statements.

Consolidation

2.3 Consolidation

The Group has prepared the consolidated financial statements in accordance with IFRS 10 Consolidated Financial Statements.

(a) Subsidiaries

Subsidiaries are all entities (including special purpose entities (“SPEs”)) over which the Group has control. The Group controls an entity when the Group is exposed to, or has rights to, variable returns from its involvement with the entity and has the ability to affect those returns through its power to direct the activities of the entity. Subsidiaries are fully consolidated from the date on which control is transferred to the Group. They are deconsolidated from the date that control ceases.

The acquisition method of accounting is used to account for business combinations by the Group. The consideration transferred is measured at the fair values of the assets transferred, and identifiable assets acquired, and liabilities and contingent liabilities assumed in a business combination are measured initially at their fair values at the acquisition date. The Group recognizes any non-controlling interest in the acquired entity on an acquisition-by-acquisition basis

either at fair value or at the non-controlling interest’s proportionate share of the acquired entity’s net identifiable assets. All other non-controlling interests are measured at fair values, unless otherwise required by other standards. Acquisition-related costs are expensed as incurred.

The excess of consideration transferred, amount of any non-controlling interest in the acquired entity and acquisition-date fair value of any previous equity interest in the acquired entity over the fair value of the net identifiable assets acquired is recoded as goodwill. If those amounts are less than the fair value of the net identifiable assets of the business acquired, the difference is recognized directly in the profit or loss as a bargain purchase.

Intercompany transactions, balances and unrealized gains on transactions among group companies are eliminated. Unrealized losses are also eliminated unless the transaction provides evidence of an impairment of the transferred asset. Accounting policies of subsidiaries have been changed where necessary to ensure consistency with the policies adopted by the Group.

(b) Changes in ownership interests in subsidiaries without loss of control

Any differences between the amount of the adjustment to non-controlling interest that do not result in loss of control and any consideration paid or received is recognized in a separate reserve within equity attributable to owners of the Controlling Company.

(c) Disposal of subsidiaries

When the Group ceases to have control over a subsidiary, any retained interest in the subsidiary is remeasured to its fair value with the change in carrying amount recognized in profit or loss.

(d) Associates

Associates are entities over which the Group has significant influence but does not possess control or joint control. Investments in associates are accounted for using the equity method of accounting, after initially being recognized at cost. Unrealized gains on transactions between the Group and its associates are eliminated to the extent of the Group’s interest in the associates. If the Group’s share of losses of an associate equals or exceeds its interest in the associate (including long-term interests that, in substance, form part of the Group’s net investment in the associate), the Group discontinues recognizing its share of further losses. After the Group’s interest is reduced to zero, additional losses are provided for, and a liability is recognized, only to the extent that the Group has incurred legal or constructive obligations or made payments on behalf of the associate. If there is an objective evidence of impairment for the investment in the associate, the Group recognizes the difference between the recoverable amount of the associate and its book amount as impairment loss. If an associate uses accounting policies other than those of the Group for transactions and events in similar circumstances, if necessary, adjustments shall be made to make the associate’s accounting policies conform to those of the Group when the associate’s financial statements are used by the Group in applying the equity method.

(e) Joint arrangements

A joint arrangement, wherein two or more parties have joint control, is classified as either a joint operation or a joint venture. A joint operator recognizes its direct right to the assets, liabilities,

revenues, and expenses of joint operations and its share of any jointly held or incurred assets, liabilities, revenues, and expenses. A joint venture has rights to the net assets relating to the joint venture and accounts for that investment using the equity method.

Segment Reporting

2.4 Segment Reporting

Information of each operating segment is reported in a manner consistent with the business segment reporting provided to the chief operating decision-maker (Note 34). The chief operating decision-maker is responsible for allocating resources and assessing performance of the operating segments.

Foreign Currency Translation

2.5 Foreign Currency Translation

(a) Functional and presentation currency

Items included in the financial statements of each of the Group’s entities are measured using the currency of the primary economic environment in which each entity operates (the “functional currency”). The consolidated financial statements are presented in Korean won, which is the Controlling Company’s functional and presentation currency.

(b) Transactions and balances

Foreign currency transactions are translated into the functional currency using the exchange rates at the dates of the transactions. Foreign exchange gains and losses resulting from the settlement of such transactions and from the translation of monetary assets and liabilities denominated in foreign currencies at year end exchange rates are generally recognized in profit or loss. They are deferred in other comprehensive income if they relate to qualifying cash flow hedges and qualifying effective portion of net investment hedges, or are attributable to monetary part of the net investment in a foreign operation.

Foreign exchange gains and losses that relate to financial instruments are presented in the statement of profit or loss, within finance costs. All other foreign exchange gains and losses are presented in the statement of profit or loss within ‘other income’ or ‘other expense’.

Non-monetary items that are measured at fair value in a foreign currency are translated using the exchange rates at the date when the fair value was determined. Translation differences on assets and liabilities carried at fair value are reported as part of the fair value gain or loss. For example, translation differences on non-monetary assets and liabilities, such as equities held at fair value through profit or loss, are recognized in profit or loss as part of the fair value gain or loss and translation differences on non-monetary assets, such as equities classified as available-for-sale financial assets, are recognized in other comprehensive income.

Financial Assets

2.6 Financial Assets

(a) Classification

The Group classifies its financial assets in the following measurement categories:

• those to be measured at fair value through profit or loss

• those to be measured at fair value through other comprehensive income

• those to be measured at amortized cost

The classification depends on the Group’s business model for managing the financial assets and the contractual terms of the cash flows.

For financial assets measured at fair value, gains and losses will either be recorded in profit or loss or other comprehensive income. For investments in debt instruments, this will depend on the business model in which the investment is held. The Group reclassifies debt investments when, and only when, its business model for managing those assets changes.

For investments in equity instruments that are not held for trading, this will depend on whether the Group has made an irrevocable election at the time of initial recognition to account for the equity investment at fair value through other comprehensive income. Changes in fair value of the investments in equity instruments that are not accounted for as other comprehensive income are recognized in profit or loss.

(b) Measurement

At initial recognition, the Group measures a financial asset at its fair value plus, in the case of a financial asset not at fair value through profit or loss, transaction costs that are directly attributable to the acquisition of the financial asset. Transaction costs of financial assets carried at fair value through profit or loss are expensed in profit or loss.

Financial assets with embedded derivatives are considered in their entirety when determining whether their cash flows are solely payment of principal and interest.

A. Debt instruments

Subsequent measurement of debt instruments depends on the Group’s business model for managing the asset and the cash flow characteristics of the asset. The Group classifies its debt instruments into one of the following three measurement categories:

• Amortized cost: Assets that are held for collection of contractual cash flows where those cash flows represent solely payments of principal and interest are measured at amortized cost. A gain or loss on a debt investment that is subsequently measured at amortized cost and is not part of a hedging relationship is recognized in profit or loss when the asset is derecognized or impaired. Interest income from these financial assets is included in ‘finance income’ using the effective interest rate method.

• Fair value through other comprehensive income: Assets that are held for collection of contractual cash flows and for selling the financial assets, where the assets’ cash flows represent solely payments of principal and interest, are measured at fair value through other comprehensive income. Movements in the carrying amount are taken through other comprehensive income, except for the recognition of impairment loss (and reversal of impairment loss), interest income and foreign exchange gains and losses which are recognized in profit or loss. When the financial asset is derecognized, the cumulative gain or loss previously recognized in other comprehensive income is reclassified from equity to profit or loss. Interest income from these financial assets is included in ‘finance income’

using the effective interest rate method. Foreign exchange gains and losses are presented in ‘finance income’ or ‘finance costs’ and impairment loss in ‘finance costs’ or ‘operating expenses’.

• Fair value through profit or loss: Assets that do not meet the criteria for amortized cost or fair value through other comprehensive income are measured at fair value through profit or loss. A gain or loss on a debt investment that is subsequently measured at fair value through profit or loss and is not part of a hedging relationship is recognized in profit or loss and presented net in the statement of profit or loss within ‘finance income’ or ‘finance costs’ in the period in which it arises.

B. Equity instruments

The Group subsequently measures all equity investments at fair value. Where the Group’s management has elected to present fair value gains and losses on equity investments in other comprehensive income, there is no subsequent reclassification of fair value gains and losses to profit or loss following the derecognition of the investment. Dividend income from such investments continue to be recognized in profit or loss as ‘finance income’ when the Group’s right to receive payments is established.

Changes in the fair value of financial assets at fair value through profit or loss are recognized in ‘finance income’ or ‘finance costs’ in the statement of profit or loss as applicable. Impairment loss (reversal of impairment loss) on equity investments, measured at fair value through other comprehensive income, are not reported separately from other changes in fair value.

(c) Impairment

The Group assesses on a forward-looking basis the expected credit losses associated with its debt instruments carried at amortized cost and fair value through other comprehensive income. The impairment methodology applied depends on whether there has been a significant increase in credit risk. For trade receivables and lease receivables, the Group applies the simplified approach, which requires expected lifetime credit losses to be recognized from initial recognition of the receivables.

(d) Recognition and derecognition

Regular way purchases and sales of financial assets are recognized or derecognized on trade-date, the date on which the Group commits to purchase or sell the asset. Financial assets are derecognized when the rights to receive cash flows from the financial assets have expired or have been transferred and the Group has transferred substantially all the risks and rewards of ownership.

If a transfer does not result in derecognition because the Group has retained substantially all the risks and rewards of ownership of the transferred asset, the Group continues to recognize the transferred asset in its entirety and recognizes a financial liability for the consideration received.

(e) Offsetting of financial instruments

Financial assets and liabilities are offset and the net amount reported in the statements of financial position where there is a legally enforceable right to offset the recognized amounts and there is an intention to settle on a net basis or realize the assets and settle the liability simultaneously. The legally enforceable right must not be contingent on future events and must be enforceable in the normal course of business and in the event of default, insolvency or bankruptcy of the Group or the counterparty.

Derivative Instruments

2.7 Derivative Instruments

Derivatives are initially recognized at fair value on the date a derivative contract is entered into and are subsequently remeasured to their fair value at the end of each reporting period. The accounting treatment for subsequent changes in fair value depends on whether the derivative is designated as a hedging instrument, and if so, the nature of the item being hedged. The Group has hedge relationships and designates certain derivatives as:

• hedges of a particular risk associated with the cash flows of recognized assets and liabilities and highly probable forecast transactions (cash flow hedges)

At inception of the hedge relationship, the Group documents the economic relationship between hedging instruments and hedged items including whether changes in the cash flows of the hedging instruments are expected to offset changes in the cash flows of hedged items.

The fair values of derivative financial instruments designated in hedge relationships are disclosed in Note 37.

The full fair value of a hedging derivative is classified as a non-current asset or liability when the remaining maturity of the hedged item is more than 12 months; it is classified as a current asset or liability when the remaining maturity of the hedged item is less than 12 months. A non-derivative financial asset and a non-derivative financial liability is classified as a current or non-current based on its expected maturity and its settlement, respectively.

The effective portion of changes in fair value of derivatives that are designated and qualify as cash flow hedges is recognized in the cash flow hedge reserve within equity to the limit of the cumulative change in fair value (present value) of the hedge item (the present value of the cumulative change in the future expected cash flows of the hedged item) from the inception of the hedge. The ineffective portion is recognized in ‘finance income (costs)’.

Amounts of changes in fair value of effective hedging instruments accumulated in equity are recognized as ‘finance income (costs)’ for the periods when the corresponding transactions affect profit or loss.

When a hedging instrument expires, or is sold, terminated, exercised, or when a hedge no longer meets the criteria for hedge accounting, any accumulated cash flow hedge reserve at that time remains in equity until the forecast transaction occurs, resulting in the recognition of a non-financial asset such as inventory. When the forecast transaction is no longer expected to occur, the cash flow hedge reserve and deferred costs of hedging that were reported in equity are immediately reclassified to profit or loss.

Trade Receivables

2.8 Trade Receivables

Trade receivables are recognized initially at the amount of consideration that is unconditional, unless they contain significant financing components when they are recognized at fair value. Trade receivables are subsequently measured at amortized cost using the effective interest method, less loss allowance. See Note 6 for further information about the Group’s accounting treatment for trade receivables and Note 2.6 (c) for a description of the Group’s accounting policy on impairment.

Inventories

2.9 Inventories

Inventories are stated at the lower of cost and net realizable value. Cost is determined using the moving average method, except for inventories in-transit (specific identification method).

Property and Equipment

2.10 Property and Equipment

Property and equipment are stated at historical cost less accumulated depreciation and accumulated impairment losses. Historical cost includes expenditures that is directly attributable to the acquisition of the items.

Depreciation of all property and equipment, except for land, is calculated using the straight-line method to allocate their cost, net of their residual values, over their estimated useful lives as follows:

	Useful Life
Buildings	5 – 40 years
Structures	5 – 40 years
Machinery and equipment (Telecommunications equipment and others)	2 – 40 years
Vehicles	4 – 10 years
Tools	2 – 6 years
Office equipment	2 – 8 years

The depreciation method, residual values, and useful lives of property and equipment are reviewed at the end of each reporting period and, if appropriate, accounted for as changes in accounting estimates.

Investment Property

2.11 Investment Property

Real estate held for rental income or investment gains is classified as investment property and right-of-use asset. An investment property is measured initially at its cost. After recognition as an asset, investment property is carried at cost less accumulated depreciation and impairment losses. Investment property, except for land, is depreciated using the straight-line method over their useful lives from 5 to 40 years.

Intangible Assets

2.12 Intangible Assets

(a) Goodwill

Goodwill is measured as explained in Note 2.3 (a) and goodwill arising from acquisition of subsidiaries and businesses is included in intangible assets. Goodwill is tested annually for

impairment and carried at cost less accumulated impairment losses. Gains and losses on the disposal of subsidiaries and business include the carrying amount of goodwill relating to the subsidiaries and businesses sold.

For the purpose of impairment testing, goodwill acquired in a business combination is allocated to each of the CGUs, or group of CGUs, that is expected to benefit from the synergies of the combination. Goodwill is monitored at the operating segment level.

(b) Intangible assets excluding goodwill

Intangible assets, except for goodwill, are initially recognized at its historical cost, and carried at cost less accumulated amortization and accumulated impairment losses. Membership rights (condominium membership and golf membership), subscription rights, broadcast license, facility-use rights, and transportation rights that have indefinite useful life are not subject to amortization because there is no foreseeable limit to the period over which the assets are expected to be utilized. The Group amortizes intangible assets with a limited useful life using the straight-line method over the following periods:

	Useful Life
Development costs		3 – 10 years
Software		3 – 10 years
Frequency usage rights		5 – 10 years
Others1		1 – 50 years

1  Membership rights (condominium membership and golf membership), subscription rights, broadcast license, facility usage rights and transportation license included in others are classified as intangible assets with indefinite useful life.

Borrowing Costs

2.13 Borrowing Costs

General and specific borrowing costs that are directly attributable to the acquisition, construction or production of a qualifying asset are capitalized during the period of time that is required to complete and prepare the asset for its intended use or sale. Investment income earned on the temporary investment of specific borrowings on qualifying assets is deducted from the borrowing costs eligible for capitalization. Other borrowing costs are expensed in the period in which they are incurred.

Government Grants

2.14 Government Grants

Grants from the government are recognized at their fair value where there is a reasonable assurance that the grant will be received and the Group will comply with all attached conditions. Government grants related to assets are presented in the statement of financial position by setting up the grant as deferred income that is recognized in profit or loss on a systematic basis over the useful life of the asset. Grants related to income are deferred and are presented as a credit in the statement of profit or loss within ‘other income’.

Impairment of Non-Financial Assets

2.15 Impairment of Non-Financial Assets

Goodwill and intangible assets with indefinite useful life are tested annually for impairment at the end of each reporting period. If certain assets are deemed to be impaired, their recoverable

amount is estimated in order to determine the impairment loss. The Group estimates the recoverable amount for each asset, and, in cases when the recoverable amount cannot be estimated for an asset, the recoverable amount of the cash generating unit to which the asset belongs is estimated. Corporate assets are allocated to individual cash generating units on a reasonable and consistent basis and if they cannot be allocated to individual cash generating units, they are allocated to the smallest group of cash generating units on a reasonable and consistent basis. An impairment loss is recognized for the amount by which the asset’s carrying amount exceeds its recoverable amount (higher of its fair value less costs of disposal and value in use). Impairment loss on non-financial assets other than goodwill are evaluated for reversal at the end of each reporting period.

Trade and other payables

2.16 Trade and Other Payables

These amounts represent liabilities for goods and services provided to the Group prior to the end of reporting period which are unpaid. Trade and other payables are presented as current liabilities, unless payment is not due within 12 months after the reporting period. They are recognized initially at their fair value and subsequently measured at amortized cost using the effective interest method.

Financial Liabilities

2.17 Financial Liabilities

(a) Classification and measurement

The Group’s financial liabilities at fair value through profit or loss are financial instruments held for trading. A financial liability is held for trading if it is incurred principally for the purpose of repurchasing in the near term. Derivatives that are not designated as hedging instruments or derivatives separated from financial instruments containing embedded derivatives are also categorized as held for trading.

The Group classifies non-derivative financial liabilities, except for financial liabilities at fair value through profit or loss, financial guarantee contracts and financial liabilities that arise when a transfer of financial assets does not qualify for derecognition, as financial liabilities carried at amortized cost and present as ‘trade payables and other payables’, ‘borrowings’ and ‘other financial liabilities’ in the statement of financial position.

Borrowings are initially recognized as the amount obtained by subtracting the transaction cost incurred from the fair value and is then measured as amortized cost. The difference between the consideration received (net of transaction cost) and the redemption amount is recognized as profit or loss over the period using the effective interest rate method. Fees paid to receive the borrowing limit are recognized as transaction costs for loans to the extent that they are likely to be borrowed as part or all of the borrowing limit. In this case, the fee will be deferred until the draw-down occurs. There is a high possibility that borrowings will be executed as part or all of the borrowing limit agreement (relevant fees to the extent that there is no evidence) are recognized as assets as advance payments for liquidity services and amortized over the relevant borrowing limit period.

Preferred shares that require mandatory redemption at a particular date are classified as liabilities. Interest expenses on these preferred shares using the effective interest method are recognized in the statement of profit or loss as ‘finance costs’, together with interest expenses recognized from other financial liabilities.

Borrowings are classified as current liabilities unless the Group has an unconditional right to defer settlement of the liability for at least 12 months after the reporting period.

(b) Derecognition

Financial liabilities are removed from the statement of financial position when it is extinguished; for example, when the obligation specified in the contract is discharged or cancelled or expired or when the terms of an existing financial liability are substantially modified. The difference between the carrying amount of a financial liability extinguished or transferred to another party and the consideration paid (including any non-cash assets transferred or liabilities assumed) is recognized in profit or loss.

The Group’s financial liabilities at fair value through profit or loss are financial instruments held for trading and financial liabilities designated as at fair value through profit or loss. A financial liability is held for trading if it is incurred principally for the purpose of repurchasing in the near term. A derivative that is not a designated as hedging instruments and an embedded derivative that is separated are also classified as held for trading. Financial liabilities designed as at fair value through profit or loss are structured financial liabilities containing embedded derivatives issued by the Group.

Financial Guarantee Contracts

2.18 Financial Guarantee Contracts

Financial guarantee contracts are recognized as a financial liability at the time the guarantee is issued. The liability is initially measured at fair value, subsequently at the higher of the following amount, and the related liability is recognized as ‘other financial liabilities’ in the consolidated statement of financial position:

• the amount determined in accordance with the expected credit loss model under IFRS 9 Financial Instruments

• the amount initially recognized less, where appropriate, the cumulative amount of income recognized in accordance with IFRS 15 Revenue from Contracts with Customers

Compound Financial Instruments

2.19 Compound Financial Instruments

Compound financial instruments are convertible notes that can be converted into equity instruments at the option of the holder.

The liability component of a compound financial instrument is recognized initially at the fair value of a similar liability that does not have an equity conversion option, and subsequently measured at amortized cost until extinguished on conversion or maturity of the bonds. The equity component is recognized initially on the difference between the fair value of the compound financial instrument as a whole and the fair value of the liability component. Any directly attributable transaction costs are allocated to the liability and equity components in proportion to their initial carrying amounts.

Employee Benefits

2.20 Employee Benefits

(a) Post-employment benefits

The Group operates both defined contribution and defined benefit pension plans.

A defined contribution plan is a pension plan under which the Group pays fixed contributions into a separate entity. The contributions are recognized as employee benefit expenses when an employee has rendered service.

A defined benefit plan is a pension plan that is not a defined contribution plan. Generally, post-employment benefits are payable after the completion of employment, and the benefit amount depended on the employee’s age, periods of service or salary levels. The liability recognized in the statement of financial position in respect of defined benefit pension plans is the present value of the defined benefit obligation at the end of the reporting period less the fair value of plan assets. The defined benefit obligation is calculated annually by independent actuaries using the projected unit credit method. The present value of the defined benefit obligation is determined by discounting the estimated future cash outflows using interest rates of high-quality corporate bonds that are denominated in the currency in which the benefits will be paid, and that have terms approximating to the terms of the related obligation. Remeasurement gains and losses arising from experience adjustments and changes in actuarial assumptions are recognized in the period in which they occur, directly in other comprehensive income.

Changes in the present value of the defined benefit obligation resulting from plan amendments or curtailments are recognized immediately in profit or loss as past service costs.

(b) Termination benefits

Termination benefits are payable when employment is terminated by the Group before the normal retirement date, or whenever an employee accepts voluntary redundancy in exchange for these benefits. The Group recognizes termination benefits at the earlier of the following dates: when the entity can no longer withdraw the offer of those benefits or when the entity recognizes costs for a restructuring.

(c) Long-term employee benefits

Certain entities within the Group provide long-term employee benefits that are entitled to employees with service period for ten years and above. The expected costs of these benefits are accrued over the period of employment using the same accounting methodology as used for defined benefit pension plans. The Group recognizes service cost, net interest on other long-term employee benefits and remeasurements as profit or loss for the year. These liabilities are valued annually by an independent qualified actuary.

Share-based payments

2.21 Share-Based Payments

Equity-settled share-based payment is recognized at fair value of equity instruments granted, and employee benefit expense is recognized over the vesting period. At the end of each period, the Group revises its estimates of the number of options that are expected to vest based on the non-market vesting and service conditions. It recognizes the impact of the revision to original estimates, if any, in profit or loss, with a corresponding adjustment to equity.

The acquiree may have outstanding share-based payment transactions that the acquirer does not exchange for its share-based payment transactions. If vested, those acquiree share-based payment transactions are part of the non-controlling interest in the acquiree and are measured at their market-based measure. If unvested, the market-based measure of unvested share-based payment transactions is allocated to the non-controlling interest on the basis of the ratio of the portion of the vesting period completed to the greater of the total vesting period and the original vesting period of the share-based payment transaction. The balance is allocated to post-combination service.

Provisions

2.22 Provisions

Provisions for service warranties, recoveries, litigations and claims, and others are recognized when the Group presently hold legal or constructive obligation as a result of past events, and when it is probable that an outflow of resources will be required to settle the obligation and the amount can be reliably estimated. Provisions are measured at the present value of management’s best estimate of the expenditure required to settle the present obligation at the end of the reporting period, and the increase in the provision due to the passage of time is recognized as interest expense.

Leases

2.23 Leases

(a) Lessee

The Group leases various repeater server racks, offices, communication line facilities, machinery, cars, and others.

Contracts may contain both lease and non-lease components. The Group allocates the consideration in the contract to the lease and non-lease components based on their relative stand-alone prices.

Assets and liabilities arising from a lease are initially measured on a present value basis. Lease liabilities include the net present value of the following lease payments:

• Fixed payments (including in-substance fixed payments), less any lease incentives receivable

• Variable lease payment that are based on an index or a rate, initially measured using the index or rate as at the commencement date

• Amounts expected to be payable by the Group (the lessee) under residual value guarantees

• The exercise price of a purchase option if the Group (the lessee) is reasonably certain to exercise that option, and

• Payments of penalties for terminating the lease, if the lease term reflects the Group (the lessee) exercising that option

Measurement of lease liability also includes payments to be made in optional periods if the lessee is reasonably certain to exercise an option to extend the lease.

The Group determines the lease term as the non-cancellable period of a lease, together with both (a) periods covered by an option to extend the lease if the lessee is reasonably certain to exercise

that option; and (b) periods covered by an option to terminate the lease if the lessee is reasonably certain not to exercise that option. When the lessee and the lessor each has the right to terminate the lease without permission from the other party, the Group should consider a termination penalty in determining the period for which the contract is enforceable.

The lease payments are discounted using the interest rate implicit in the lease. If that rate cannot be determined, the lessee’s incremental borrowing rate is used, which is the rate that the lessee would have to pay to borrow the funds necessary to obtain an asset of similar value in a similar economic environment with similar terms and conditions.

The Group is exposed to potential future increases in variable lease payments based on an index or rate, which are not included in the lease liability until they take effect. When adjustments to lease payments based on an index or rate take effect, the lease liability is reassessed and adjusted against the right-of-use asset.

Each lease payment is allocated between the liability and finance cost. The finance cost is charged to profit or loss over the lease period in order to produce a constant periodic rate of interest on the remaining balance of the liability for each period.

Right-of-use assets are measured at cost comprising the following:

• the amount of the initial measurement of lease liability

• any lease payments made at or before the commencement date less any lease incentives received

• any initial direct costs (leasehold deposits)

• restoration costs

The right-of-use asset is depreciated over the shorter of the asset’s useful life and the lease term on a straight-line basis. If the Group is reasonably certain to exercise a purchase option, the right-of-use asset is depreciated over the underlying asset’s useful life.

Payments associated with short-term leases and leases of low-value assets are recognized on a straight-line basis as an expense in profit or loss. Short-term leases are leases with a lease term of 12 months or less, such as vehicles, machinery, and others. Low-value assets are comprised of tools, office equipment, and others.

(b) Lessor

Lease income from operating leases where the Group is a lessor is recognized in income on a straight-line basis over the lease term. Initial direct costs incurred in obtaining an operating lease are added to the carrying amount of the underlying asset and recognized as expense over the lease term on the same basis as lease income. The respective leased assets are included in the statement of financial position based on their nature.

(c) Extension and termination option

Extension and termination options are included in a number of property and equipment leases across the Group. These terms are used to maximize operational flexibility in terms of managing contracts. The majority of extension and termination options held are exercisable only by the

Group and not by the respective lessor. Information on critical accounting estimates and assumptions related to the determination of the lease term is presented in Note 3.

Share Capital

2.24 Share Capital

The Controlling Company classifies ordinary shares as equity.

Where the Controlling Company purchases its own shares, the consideration paid, including any directly attributable incremental costs, is deducted from equity until the share are cancelled or reissued. When these treasury shares are reissued, any consideration received is included in equity attributable to the equity holders of the Controlling Company.

Revenue Recognition

2.25 Revenue Recognition

(a) Identifying performance obligations

The Group mainly provides telecommunication services and sells handsets. The Group identifies performance obligations with a customer such as providing telecommunication services, selling handsets, and others. Revenue from handsets is recognized when a performance obligation is satisfied by transferring promised goods to customers, and the revenue from telecommunication services is recognized over the estimated contract periods of each services by transferring promised services to customers.

(b) Allocation the transaction price and revenue recognition

The Group allocates the transaction price to each performance obligation identified in the contract based on a relative stand-alone selling prices of the goods or services being provided to the customer. To allocate the transaction price to each performance obligation on a relative stand-alone price basis, the Group determines the stand-alone selling price at contract inception of the distinct good or service underlying each performance obligation in the contract and allocate the transaction price in proportion to those stand-alone selling price. The stand-alone selling price is the price at which the Group would sell a promised good or service separately to the customer. The best evidence of a stand-alone selling price is the observable price of a good or service when the Group sells that good or service separately in similar circumstances and to similar customers. The Group recognizes the allocated amount as contract assets or contract liabilities, and amortizes it through the remaining period which is adjusted in operating income.

(c) Incremental contract acquisition costs

The Group pays commission fees when new customers subscribe to telecommunication services. The incremental contract acquisition costs are those commission fees that the Group incurs to acquire a contract with a customer that would not have been incurred if the contract had not been acquired. The Group recognizes the incremental contract acquisition costs as an asset and amortizes it over the expected period of benefit. However, as a practical expedient, the Group may recognize the incremental contract acquisition costs as an expense when it is incurred if the amortization period of the asset is one year or less.

(d) Commission fees

Commission fees are recognized when it is probable that future economic benefits will flow to the entity and these benefits can be reliably measured. Revenues are measured at the fair value of the consideration received.

Current and Deferred Income Tax

2.26 Current and Deferred Income Tax

The tax expense for the period consists of current and deferred tax. Current and deferred tax is recognized in profit or loss, except to the extent that it relates to items recognized in other comprehensive income or directly in equity. In this case, the tax is also recognized in other comprehensive income or directly in equity, respectively.

The current income tax expense is measured at the amount expected to be paid to taxation authorities, using the tax rates (and tax laws) that have been enacted or substantively enacted by the end of the reporting period.

Management periodically evaluates positions taken in tax returns with respect to situations in which applicable tax regulation is subject to interpretation, and considers whether it is probable that a taxation authority will accept an uncertain tax treatment. The Group measures its tax balances either based on the most likely amount or the expected value, depending on which method provides a better prediction of the resolution of the uncertainty.

Deferred income tax is provided in full, using the liability method, on temporary differences arising between the tax bases of assets and liabilities and their carrying amounts in the consolidated financial statements. However, deferred income tax is not accounted for if it arises from initial recognition of an asset or liability in a transaction other than a business combination that at the time of the transaction affects neither accounting profit nor taxable profit or loss.

Deferred tax assets are recognized only if it is probable that future taxable amount will be available to utilize those temporary differences and losses.

The Group recognizes a deferred tax liability all taxable temporary differences associated with investments in subsidiaries, associates, and interests in joint arrangements, except to the extent that the Group is able to control the timing of the reversal of the temporary difference and it is probable that the temporary difference will not reverse in the foreseeable future. In addition, the Group recognizes a deferred tax asset for all deductible temporary differences arising from such investments to the extent that it is probable the temporary difference will reverse in the foreseeable future and taxable profit will be available against which the temporary difference can be utilized.

Deferred tax assets and liabilities are offset when there is a legally enforceable right to offset current tax assets and liabilities and when the deferred tax balances relate to the same taxation authority. Current tax assets and liabilities are offset when the Group has a legally enforceable right to offset and intends either to settle on a net basis, or to realize the assets and settle the liability simultaneously.

Dividend

2.27 Dividend

Dividend distribution to the Group’s shareholders is recognized as a liability in the financial statements in the period in which the dividends are approved by the Group’s shareholders.

Approval on Issuance of the Consolidated Financial Statements

2.28 Approval on Issuance of the Consolidated Financial Statements

The consolidated financial statements of 2023 were approved for issuance by the Board of Directors on April 11, 2024 and are subject to change with the approval of shareholders at their Annual General Meeting.

XML

General Information (Tables)

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Summary of Consolidated Subsidiaries

(1) The consolidated subsidiaries as of December 31, 2022 and 2023, are as follows

			Controlling percentage ownership1 (%)
Subsidiary	Type of business	Location	December 31, 2022	December 31, 2023	Closing month
KT Linkus Co., Ltd.	Public telephone maintenance	Korea	92.4%	92.4%	December
KT Telecop Co., Ltd.	Security service	Korea	86.8%	86.8%	December
KT Alpha Co., Ltd. 5	Data communication	Korea	73.0%	73.0%	December
KT Service Bukbu Co., Ltd	Opening services of fixed line	Korea	67.3%	67.3%	December
KT Service Nambu Co., Ltd.	Opening services of fixed line	Korea	77.3%	77.3%	December
KT Commerce Inc.	B2C, B2B service	Korea	100.0%	100.0%	December
KT Strategic Investment Fund No.3	Investment fund	Korea	100.0%	100.0%	December
KT Strategic Investment Fund No.4	Investment fund	Korea	100.0%	100.0%	December
KT Strategic Investment Fund No.5	Investment fund	Korea	100.0%	100.0%	December
BC-VP Strategic Investment Fund No.1	Investment fund	Korea	100.0%	100.0%	December
BC Card Co., Ltd.	Credit card business	Korea	69.5%	69.5%	December

			Controlling percentage ownership1 (%)
Subsidiary	Type of business	Location	December 31, 2022	December 31, 2023	Closing month
VP Inc. 5	Payment security service for credit card, others	Korea	69.7%	72.2%	December
H&C Network	Call center for financial sectors	Korea	100.0%	100.0%	December
BC Card China Co., Ltd.	Software development and data processing	China	100.0%	100.0%	December
INITECH Co., Ltd. 5	Internet banking ASP and security solutions	Korea	61.3%	63.9%	December
Smartro Co., Ltd.	VAN (Value Added Network) business	Korea	64.5%	64.5%	December
KTDS Co., Ltd. 5	System integration and maintenance	Korea	95.6%	91.6%	December
KT M&S Co., Ltd.	PCS distribution	Korea	100.0%	100.0%	December
GENIE Music Corporation 2	Online music production and distribution	Korea	36.0%	36.0%	December
KT MOS Bukbu Co., Ltd. 5	Telecommunication facility maintenance	Korea	100.0%	100.0%	December
KT MOS Nambu Co., Ltd. 5	Telecommunication facility maintenance	Korea	98.4%	98.4%	December
KT Skylife 5	Satellite TV	Korea	50.2%	50.6%	December
Skylife TV Co., Ltd.	TV contents provider	Korea	100.0%	100.0%	December
KT Estate Inc.	Residential building development and supply	Korea	100.0%	100.0%	December
KT Investment Management Inc.	Asset management, real estate and consulting services	Korea	100.0%	100.0%	December
NEXR Co., Ltd.	Cloud system implementation	Korea	100.0%	100.0%	December
KTGDH Co., Ltd.	Data center development and related service	Korea	100.0%	100.0%	December
KT Sat Co., Ltd.	Satellite communication business	Korea	100.0%	100.0%	December
Nasmedia Co., Ltd. 2,5	Solution provider and IPTV advertisement sales business	Korea	44.0%	44.1%	December
KT Sports Co., Ltd.	Management of sports teams	Korea	100.0%	100.0%	December
KT Music Contents Fund No.2	Music and contents investment business	Korea	100.0%	100.0%	December
KTCS Corporation 2,5	Database and online information provider	Korea	34.1%	34.1%	December
KTIS Corporation 2,5	Database and online information provider	Korea	33.3%	33.3%	December
KT M Mobile Co., Ltd.	Special category telecommunications operator and sales of communication device	Korea	100.0%	100.0%	December
KT Investment Co., Ltd.	Financing business for new technology	Korea	100.0%	100.0%	December
PlayD Co., Ltd.	Advertising agency	Korea	70.4%	70.4%	December
Next Connect PFV	Residential building development and supply	Korea	100.0%	100.0%	December
KT Rwanda Networks Ltd.	Network installation and management	Rwanda	51.0%	51.0%	December
AOS Ltd.	System integration and maintenance	Rwanda	51.0%	51.0%	December
KT Japan Co., Ltd.	Foreign investment business and local counter work	Japan	100.0%	100.0%	December

			Controlling percentage ownership1 (%)
Subsidiary	Type of business	Location	December 31, 2022	December 31, 2023	Closing month
East Telecom LLC	Wireless/fixed line internet business	Uzbekistan	91.6%	91.6%	December
KT America, Inc.	Foreign investment business and local counter work	USA	100.0%	100.0%	December
PT. BC Card Asia Pacific	Software development and supply	Indonesia	99.9%	99.9%	December
KT Hongkong Telecommunications Co., Ltd.	Fixed line telecommunication business	Hong Kong	100.0%	100.0%	December
Korea Telecom Singapore Pte. Ltd.	Foreign investment business and local counter work	Singapore	100.0%	100.0%	December
Texnoprosistem LLC	Fixed line internet business	Uzbekistan	100.0%	100.0%	December
Nasmedia Thailand Co., Ltd.	Internet advertising solution	Thailand	99.9%	99.9%	December
KT Huimangjieum	Manufacturing	Korea	100.0%	100.0%	December
K-REALTY RENTAL HOUSING REIT 3	Residential building	Korea	88.6%	88.6%	December
Storywiz Co., Ltd.	Contents and software development and supply	Korea	100.0%	100.0%	December
KT Engineering Co., Ltd.	Telecommunication facility construction and maintenance	Korea	100.0%	100.0%	December
KT Studio Genie Co., Ltd.	Data communication service and data communication construction business	Korea	90.9%	90.9%	December
KHS Corporation	Operation and maintenance of facilities	Korea	100.0%	100.0%	December
Lolab Co., Ltd.	Truck transportation and trucking arrangement business	Korea	79.8%	79.8%	December
HCN Co., Ltd.	Cable television service	Korea	100.0%	100.0%	December
Millie Seojae 2	Book contents service	Korea	38.6%	30.2%	December
KT ES Pte. Ltd.	Foreign investment business	Singapore	57.6%	57.6%	December
Epsilon Global Communications PTE. Ltd.	Network service industry	Singapore	100.0%	100.0%	December
Epsilon Telecommunications (SP) PTE. Ltd.	Fixed line telecommunication business	Singapore	100.0%	100.0%	December
Epsilon Telecommunications (US) PTE. Ltd.	Fixed line telecommunication business	Singapore	100.0%	100.0%	December
Epsilon Telecommunications Limited	Fixed line telecommunication business	UK	100.0%	100.0%	December
Epsilon Telecommunications (HK) Limited	Fixed line telecommunication business	Hong Kong	100.0%	100.0%	December
Epsilon US Inc.	Fixed line telecommunication business	USA	100.0%	100.0%	December
Epsilon Telecommunications (BG) EOOD	Employee support service	Bulgaria	100.0%	100.0%	December
Nasmedia-KT Alpha Future Growth Strategic Investment Fund	Investment fund	Korea	100.0%	100.0%	December
KT Strategic Investment Fund 6	Investment fund	Korea	100.0%	100.0%	December
Altimedia Corporation	Software development and delivery	Korea	100.0%	100.0%	December
Altimidia B.V. (formerly Alticast B.V.)	Software development and delivery	Netherlands	100.0%	100.0%	December

			Controlling percentage ownership1 (%)
Subsidiary	Type of business	Location	December 31, 2022	December 31, 2023	Closing month
Altimidia Vietnam (formerly Alticast Company Limited)	Software development and delivery	Vietnam	100.0%	100.0%	December
BCCARD VIETNAM LTD.	Software sales business	Vietnam	100.0%	100.0%	December
KTP SERVICES INC.	Fixed line telecommunication business	Philippines	100.0%	100.0%	December
KT RUS LLC	Foreign investment business	Russia	100.0%	100.0%	December
Hangang Real Estate Investment Trust No. 24	Investment fund	Korea	75.0%	75.0%	December
KT DX Vietnam Company Limited	Software development	Vietnam	100.0%	100.0%	December
KT Cloud Co., Ltd.	Information and communications development	Korea	100.0%	92.7%	December
Pocheon Jeonggyori Development Co., Ltd.	Residential building development	Korea	80.9%	80.9%	December
PT CRANIUM ROYAL ADITAMA	Software development	Indonesia	67.0%	67.0%	December
Juice Inc. 3,5	Online information provider/Software development and delivery	Korea	41.2%	42.6%	December
open cloud lab Co., Ltd (formerly SPARK AND ASSOCIATES INC.)	IT consulting service and Telecommunication equipment sales	Korea	100.0%	100.0%	December
KD Living, Inc.	Residential building management	Korea	—	100.0%	December
KT HEALTHCARE VINA COMPANY LIMITED	Medical service	Vietnam	—	100.0%	December
K-Realty Qualified Private Real Estate Investment Trust No. 1 4	Real estate management	Korea	—	6.5%	December
AQUA RETAIL VIETNAM COMPANY LIMITED	E-voucher issuance and trading business	Vietnam	—	100.0%	December
K-Realty Qualified Private Real Estate Investment Trust No. 4	Real estate management	Korea	—	93.9%	December

1 Sum of the interests owned by the Controlling Company and subsidiaries.

2 Although the Controlling Company owns less than 50% interest in Nasmedia, Co., Ltd., KTCS Corporation and KTIS Corporation, Millie Seojae, and GENIE Music Corporation these entities are consolidated as the Controlling Company can exercise the majority of the voting rights in its decision-making process at all times considering voting patterns at previous shareholders’ meetings.

3 Although the Controlling Company owns less than 50% interest in, Juice Inc., this entity is consolidated as the Controlling Company holds the majority of the voting right based on an agreement with other investors.

4 Although the Controlling Company owns less than 50% interest in K-Realty Qualified Private Real Estate Investment Trust No. 1, these entities are consolidated by comprehensively considering the criteria for determining control, such as ‘power’, ‘variable profit’, and ‘relationship between power and variable profit’, rather than simply judging by the interests owned by the company.

5 The number of treasury stocks held by subsidiaries are deducted from the total number of shares when calculating the controlling percentage interest.

(2) Changes in Scope of Consolidation

Subsidiaries newly included and excluded in the consolidation during the year ended December 31, 2023:

Changes	Location	Name of subsidiary	Reason
Included	Korea	KD Living, Inc.	Transferred1
Included	Vietnam	KT HEALTHCARE VINA COMPANY LIMITED	Newly established
Included	Korea	K-Realty Qualified Private Real Estate Investment Trust No. 1	Transferred2
Included	Vietnam	AQUA RETAIL VIETNAM COMPANY LIMITED	Newly established
Included	Korea	K-Realty Qualified Private Real Estate Investment Trust No. 4	Newly established
Excluded	United Arab Emirates	Epsilon M E A General Trading LLC	Liquidated
Excluded	Korea	Alpha DX Solution Co., Ltd.	Merged
Excluded	Korea	KT Strategic Investment Fund No.2	Liquidated
Excluded	Korea	LS Marine Solution Co., Ltd. (formerly KT Submarine Co., Ltd.)	Excluded3
Excluded	Korea	KT-Michigan Global Contents Fund	Liquidated
Excluded	Russia	KT Primorye IDC LLC	Liquidated

1 The entity has been reclassified from a joint venture to a consolidated entity.

2 Although the Controlling Company owns less than 50% interest in K-Realty Qualified Private Real Estate Investment Trust No. 1, these entities are consolidated by comprehensively considering the criteria for determining control, such as ‘power’, ‘variable profit’, and ‘relationship between power and variable profit’, rather than simply judging by the interests owned by the company.

3 Due to the loss of control by the parent company, the entity has been reclassified from a subsidiary to an associate company.

(3) Summarized information for consolidated subsidiaries as at and for the years ended December 31, 2021, 2022 and 2023 is as follows

(In millions of Korean won)	December 31, 20213
	Total assets		Total liabilities		Operating revenues3		Profit (loss) for the year3
KT Linkus Co., Ltd	￦	54,219	￦	53,316	￦	81,434	￦	(3,095	)
KT Submarine Co., Ltd.		110,390		10,736		31,374		(3,183	)
KT Telecop Co., Ltd.		363,224		233,797		515,456		3,985
KT Alpha Co., Ltd. (KT Hitel Co., Ltd.)		390,671		172,767		471,870		(8,692	)
KT Service Bukbu Inc.		59,341		54,070		231,602		1,128
KT Service Nambu Inc.		62,513		52,695		271,174		1,430
BC Card Co., Ltd. 1		3,933,427		2,481,004		3,580,970		120,308
H&C Network Co., Ltd. 1		88,616		4,993		227,604		11,995
Nasmedia Co., Ltd. 1		490,394		268,618		125,876		27,120
KTDS Co., Ltd. 1		341,358		199,831		632,899		21,464
KT M&S Co., Ltd.		241,377		203,051		710,634		3,496
KT MOS Bukbu Co., Ltd.		32,511		25,402		70,212		1,637
KT MOS Nambu Co., Ltd.		36,741		26,053		71,940		2,016
KT Skylife Co., Ltd. 1		1,275,645		469,694		772,950		62,309
KT Estate Inc. 1		2,370,940		791,884		577,578		213,203
KTGDH Co., Ltd.		11,464		1,560		4,423		553
KT Sat Inc.		593,616		34,169		174,750		20,830
KT Sports Inc.		29,524		19,740		67,612		(2,039	)
KT Music Contents Fund No.2		14,985		278		253		(30	)
KT-Michigan Global Contents Fund		3,552		112		13,592		10,032
KT M Mobile Inc.		144,175		40,749		204,641		5,918
KT Investment Co., Ltd. 1		87,366		66,108		21,040		(697	)
KTCS Corporation 1		416,750		234,172		968,499		19,034
KTIS Corporation		369,361		177,619		487,801		24,944
Next Connect PFV Inc.		518,441		167,963		—		(6,519	)
KT Japan Co., Ltd. 1		1,474		2,633		1,298		(142	)
KT America, Inc.		4,884		101		6,508		201
KT Rwanda Networks Ltd. 2		125,860		236,389		23,328		(28,770	)
AOS Ltd. 2		11,539		2,812		6,942		823
KT Hong Kong Telecommunications Co., Ltd.		6,613		1,346		18,825		1,313
KT Hopemate 1		6,311		2,978		12,538		116
KT Engineering Co., Ltd. (KT ENGCORE Co., Ltd.)		185,850		144,832		284,998		366
KT Studio Genie Co., Ltd. 1,		648,534		276,933		90,047		(16,443	)
Lolab Co., Ltd.		26,726		897		2,107		(134	)
East Telecom LLC 1		35,904		22,088		11,960		2,487
KT ES Pte. Ltd. 1		240,331		80,597		15,157		(6,355	)
KT Philippines		3,641		1,243		—		—
Altimedia Corporation 1		32,338		9,742		6,968		1,037

1 These companies are the intermediate controlling companies of other subsidiaries and the above financial information is from their consolidated financial statements.

2 Convertible preferred stock issued by subsidiaries as of the end of the reporting period is included in liabilities.

3 Profit or loss is included from the date of acquisition of control to the end of the reporting period.

(in millions of Korean won)	December 31, 20223
	Total assets		Total liabilities		Operating revenues3		Profit (loss) for the year3
KT Linkus Co., Ltd.	￦	47,734	￦	47,498	￦	76,135	￦	(614	)
KT Submarine Co., Ltd.		120,255		7,884		42,848		(12,126	)
KT Telecop Co., Ltd.		370,004		230,965		517,406		4,267
KT Alpha Co., Ltd. 1 (KT Hitel Co., Ltd.)		406,236		172,211		516,737		13,115
KT Service Bukbu Co., Ltd.		74,673		65,820		252,304		3,227
KT Service Nambu Co., Ltd.		80,450		66,479		301,720		3,067
BC Card Co., Ltd. 1		5,666,075		4,109,200		3,897,090		148,341
H&C Network		82,737		6,640		27,392		992
Nasmedia Co., Ltd. 1		516,945		275,730		153,210		27,691
KTDS Co., Ltd. 1		401,932		228,474		723,161		30,941
KT M&S Co., Ltd.		255,310		204,336		730,802		8,105
KT MOS Bukbu Co., Ltd.		38,684		22,553		83,085		4,607
KT MOS Nambu Co., Ltd.		42,011		25,416		83,330		5,035
KT Skylife Co., Ltd. 1		1,359,166		503,679		1,038,468		20,941
KT Estate Inc. 1		2,480,333		833,842		478,188		58,780
KT GDH Co., Ltd.		12,059		1,596		4,323		451
KT Sat Co., Ltd.		677,980		89,644		185,313		28,073
KT Sports Co., Ltd.		28,220		15,461		65,350		(7,302	)
KT Music Contents Fund No.2		15,718		277		1,040		735
KT-Michigan Global Content Fund		2,371		27		33		(1,095	)
KT M Mobile Co., Ltd.		152,114		49,816		262,918		4,731
KT Investment Co., Ltd. 1		103,354		79,182		15,136		2,840
KTCS Corporation 1		419,726		228,618		1,031,010		17,634
KTIS Corporation		396,208		199,204		536,229		15,917
Next Connect PFV		624,734		277,967		3		(3,712	)
KT Japan Co., Ltd. 1		1,888		3,141		3,263		226
KT America, Inc.		5,945		843		8,070		37
KT Rwanda Networks Ltd. 2		126,721		267,369		30,834		(27,467	)
AOS Ltd. 2		10,972		905		8,049		1,274
KT Hong Kong Telecommunications Co., Ltd.		10,505		4,768		20,413		51
KT Huimangjieum 1		6,984		2,582		22,860		494
KT Engineering Co., Ltd. (KT ENGCORE Co., Ltd.)		141,463		89,853		258,435		10,302
KT Studio Genie Co., Ltd. 1		987,270		268,911		723,580		189,498
Lolab Co., Ltd.		35,091		17,247		74,881		(7,985	)
East Telecom LLC 1		42,691		21,645		27,030		6,419
KT ES Pte. Ltd. 1		240,721		88,640		78,815		(23,957	)
KTP SERVICES INC.		3,832		2,044		776		(255	)
Altimedia Corporation 1		44,861		15,777		47,203		6,035
KT RUS LLC 1		967		16		5		(871	)
KT DX Vietnam Company Limited		1,815		6		—		26
kt cloud Co., Ltd. 1		1,348,684		245,872		432,118		14,712

1 These companies are the intermediate controlling companies of other subsidiaries and the above financial information is from their consolidated financial statements.

2 Convertible preferred stock issued by subsidiaries as of the end of the reporting period is included in liabilities.

3 Profit or loss is included from the date of acquisition of control to the end of the reporting period.

(in millions of Korean won)	December 31, 20233
	Total assets		Total liabilities		Operating revenues		Profit (loss) for the year
KT Linkus Co., Ltd.	￦	64,178	￦	63,452	￦	81,645	￦	821
KT Telecop Co., Ltd.		375,596		235,947		527,015		5,728
KT Alpha Co., Ltd.		443,639		191,254		437,308		19,352
KT Service Bukbu Co., Ltd.		63,760		55,360		242,119		1,212
KT Service Nambu Co., Ltd.		71,576		58,745		291,170		1,354
BC Card Co., Ltd. 1		6,352,878		4,722,432		4,027,450		76,545
H&C Network		81,107		4,863		27,205		1,814
Nasmedia Co., Ltd. 1		513,311		262,336		147,934		17,703
KTDS Co., Ltd. 1		393,667		202,067		727,477		33,971
KT M&S Co., Ltd.		258,477		209,075		695,856		3,783
KT MOS Bukbu Co., Ltd.		50,750		28,431		101,428		8,457
KT MOS Nambu Co., Ltd.		46,839		26,012		101,422		5,749
KT Skylife Co., Ltd. 1		1,220,842		479,369		1,034,342		(109,407	)
KT Estate Inc. 1		2,746,546		1,121,970		511,018		871
KT GDH Co., Ltd.		7,760		1,501		4,346		648
KT Sat Co., Ltd.		699,607		88,524		182,274		30,502
KT Sports Co., Ltd.		26,615		11,299		66,309		(12,386	)
KT Music Contents Fund No.2		5,558		1,772		534		(992	)
KT M Mobile Co., Ltd.		176,838		69,317		301,049		5,605
KT Investment Co., Ltd. 1		83,638		57,420		24,976		2,180
KTCS Corporation 1		434,900		234,850		1,035,911		15,804
KTIS Corporation		447,609		243,519		593,162		13,922
Next Connect PFV		946,687		629,809		—		(29,889	)
KT Japan Co., Ltd. 1		2,015		3,341		2,793		(110	)
KT America, Inc.		6,013		701		8,928		133
KT Rwanda Networks Ltd. 2		134,847		313,787		26,788		(57,628	)
AOS Ltd. 2		10,763		1,983		8,287		128
KT Hong Kong Telecommunications Co., Ltd.		11,142		5,121		19,373		143
KT Huimangjieum 1		8,073		2,715		17,687		1,012
KT Engineering Co., Ltd.		160,243		104,005		262,063		5,327
KT Studio Genie Co., Ltd. 1		989,187		259,413		542,955		13,507
Lolab Co., Ltd.		42,744		37,838		173,035		(12,938	)
East Telecom LLC 1		48,483		22,632		30,350		7,723
KT ES Pte. Ltd. 1		117,009		90,392		87,865		(124,850	)
KTP SERVICES INC.		2,967		919		671		235
Altimedia Corporation 1		48,381		12,374		45,035		7,352
KT RUS LLC		501		10		1		(378	)
KT DX Vietnam Company Limited		1,694		102		82		(207	)
KT Cloud Co., Ltd. 1		1,983,972		503,241		679,825		63,956
KT Healthcare Vina Co., Ltd.		12,730		439		—		(721	)
K-Realty Qualified Private Real Estate Investment Trust No. 1		80,266		50,693		4,682		(1,037	)
AQUA RETAIL VIETNAM COMPANY LIMITED		1,202		62		16		(248	)

1 These companies are the intermediate controlling companies of other subsidiaries and the above financial information is from their consolidated financial statements.

2 Convertible preferred stock issued by subsidiaries as of the end of the reporting period is included in liabilities.

3 Profit or loss is included from the date of acquisition of control to the end of the reporting period.

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Material Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Summary of Estimated Useful Lives of Property, Plant and Equipment

Depreciation of all property and equipment, except for land, is calculated using the straight-line method to allocate their cost, net of their residual values, over their estimated useful lives as follows:

	Useful Life
Buildings	5 – 40 years
Structures	5 – 40 years
Machinery and equipment (Telecommunications equipment and others)	2 – 40 years
Vehicles	4 – 10 years
Tools	2 – 6 years
Office equipment	2 – 8 years

Summary of Amortization of Intangible Assets With Limited Useful Life

The Group amortizes intangible assets with a limited useful life using the straight-line method over the following periods:

	Useful Life
Development costs		3 – 10 years
Software		3 – 10 years
Frequency usage rights		5 – 10 years
Others1		1 – 50 years

1  Membership rights (condominium membership and golf membership), subscription rights, broadcast license, facility usage rights and transportation license included in others are classified as intangible assets with indefinite useful life.

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Financial Instruments by Category (Tables)

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Summary of Financial Instruments by Category

(1) Financial instruments by category as of December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	December 31, 2022
Financial assets	Financial assets at amortized cost		Financial assets at fair value through profit or loss		Financial assets at fair value through other comprehensive income		Derivatives used for hedging		Total
Cash and cash equivalents	￦	2,449,062	￦	—	￦	—	￦	—	￦	2,449,062
Trade and other receivables		7,459,994		—		129,124		—		7,589,118
Other financial assets		1,060,058		1,064,856		1,508,192		190,830		3,823,936

(in millions of Korean won)	December 31, 2022
Financial liabilities	Financial liabilities at amortized cost		Financial liabilities at fair value through profit and loss		Derivatives used for hedging		Others		Total
Trade and other payables1	￦	8,397,264	￦	—	￦	—	￦	—	￦	8,397,264
Borrowings		10,006,685		—		—		—		10,006,685
Other financial liabilities		246,606		141,280		33,555		—		421,441
Lease liabilities		—		—		—		1,172,038		1,172,038

1 Amounts related to employee benefit plans are included in Trade and other payables.

(in millions of Korean won)	December 31, 2023
Financial assets	Financial assets at amortized cost		Financial assets at fair value through profit or loss		Financial assets at fair value through other comprehensive income		Derivatives used for hedging		Total
Cash and cash equivalents	￦	2,879,554	￦	—	￦	—	￦	—	￦	2,879,554
Trade and other receivables		8,458,259		—		116,198		—		8,574,457
Other financial assets		1,385,921		939,661		1,680,168		159,211		4,164,961

(in millions of Korean won)	December 31, 2023
Financial liabilities	Financial liabilities at amortized cost		Financial liabilities at fair value through profit and loss		Derivatives used for hedging		Others		Total
Trade and other payables	￦	8,317,822	￦	—	￦	—	￦	—	￦	8,317,822
Borrowings		10,218,165		—		—		—		10,218,165
Other financial liabilities		915,185		136,106		24,547		—		1,075,838
Lease liabilities		—		—		—		1,179,909		1,179,909

Summary of Gains or Losses Arising From Financial Instruments by Category

(2) Gains or losses arising from financial instruments by category for the years ended December 31, 2021, 2022 and 2023, are as follows:

(in millions of Korean won)	2021			2022			2023
Financial assets at amortized cost
Interest income1	￦	74,937		￦	144,505		￦	360,134
Gain on foreign currency transactions4		12,826			23,824			22,782
Gain (loss) on foreign currency translation		2,911			(2,151	)		5,741
Gain (loss) on disposal		35			(81	)		(3,409	)
Loss on valuation		(110,286	)		(132,102	)		(172,966	)
Financial assets at fair value through profit or loss
Interest income1		3,673			6,008			13,480
Dividend income5		21,499			4,600			6,918
Gain (loss) on valuation6		64,659			(29,282	)		(31,965	)
Gain on disposal		29,974			2,347			14,237
Gain on foreign currency transactions4		—			1,100			—
Gain on foreign currency translation		17,794			13,711			3,396
Financial assets at fair value through other comprehensive income
Interest income1		222,290			190,281			18,966
Dividend income5		1,365			9,522			52,813
Loss on valuation		—			(61	)		—
Loss on disposal		(22,712	)		(62,183	)		(11,193	)
Other comprehensive income (loss) for the year2		129,780			(158,574	)		121,805
Derivatives used for hedging
Gain on transactions		—			27,628			10,192
Gain on valuation7		203,961			150,699			34,092
Other comprehensive income for the year2		144,967			88,048			7,772

(in millions of Korean won)	2021			2022			2023
Reclassified to profit or loss from other comprehensive gain (loss) for the year2,3		(143,305	)		(110,616	)		(29,178	)
Financial liabilities at amortized cost
Interest expense1		(232,197	)		(275,302	)		(358,486	)
Gain on valuation8		—			—			3,411
Loss on foreign currency transactions4		(3,580	)		(34,574	)		(24,054	)
Loss on foreign currency translation		(201,623	)		(168,577	)		(93,004	)
Financial liabilities at fair value through profit or loss
Gain (loss) on valuation		42,447			30,031			(7,394	)
Gain on disposal Interest expense1		2,136 —			—  (4,046	)		4,788 (44	)
Gain (loss) on foreign currency transactions4		(2	)		24			(5	)
Derivatives used for hedging
Loss on transactions		(6,208	)		(1,291	)		—
Gain (loss) on valuation		(7,206	)		(17,237	)		11,503
Other comprehensive income (loss) for the year2		(3,112	)		(23,957	)		7,557
Reclassified to profit or loss from other comprehensive income for the year2,3		6,722			15,195			(8,764	)
Lease liabilities
Interest expense1		(36,650	)		(41,469	)		(52,035	)
Total	￦	215,095		￦	(353,980	)	￦	(92,910	)

1 BC Card Co., Ltd., etc., subsidiaries of the Group, recognized interest income and expenses as operating revenue and expenses, respectively. Related interest income recognized as operating revenue is ￦112,973 million (2021: ￦27,440 million, 2022: ￦68,869 million) and related interest expense recognized as operating expense is ￦55,677 million (2021: ￦5,458 million, 2022: ￦27,060 million) for the year ended December 31, 2023.

2 The amounts directly reflected in equity after adjustments of deferred income tax.

3 During the years ended December 31, 2022 and 2023, certain derivatives of the Group were settled and the related gain or loss on valuation of cash flow hedge in other comprehensive income was reclassified to profit or loss for the year.

4 BC Card Co., Ltd., a subsidiary of the Group, recognized foreign currency transaction gain and loss and as operating revenue and expense. In relation to this, foreign currency transaction gain and loss recognized as operating revenue and expense amount to foreign exchange gain ￦5,597 million (2021 foreign exchange gain and loss: ￦2,373, 2022 foreign exchange gain and loss: ￦3,569 million), respectively, for the year ended December 31, 2023.

5 BC Card Co., Ltd., a subsidiary of the Group, recognized dividend income as operating revenue. Related dividend income recognized as operating revenue is ￦1,759 million (2021: ￦1,340 million, 2022: ￦2,299 million) for the year ended December 31, 2023.

6 KT Investment Co., Ltd., etc., subsidiaries of the Group, recognized gain and loss on valuation of financial instruments measured at fair value through profit or loss as operating income and expenses. In relation to this, valuation gain and loss recognized as operating revenue and expense amount to valuation loss ￦11,112 million (2021 valuation loss: ￦15,459 million, 2022 valuation loss: ￦7,860 million), for the year ended December 31, 2023.

7 BC Card Co., Ltd., a subsidiary of the Group, recognized gain and loss on valuation of derivatives as operating income and expenses. Related valuation gain recognized as operating revenue and expense is ￦48 million (2022 valuation loss: ￦418 million), for the year ended December 31, 2023.

8 KT Cloud Co., Ltd., a subsidiary of the Group, recognized gain on valuation as convertible preferred stock of ￦311,312 million for the year ended December 31, 2023.

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Cash and Cash Equivalents (Tables)

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Summary of Restricted Cash and Cash Equivalents

Restricted cash and cash equivalents as of December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	December 31, 2022	December 31, 2023	Description
Bank deposits	￦29,874	￦49,555	Deposit restricted for government project and others

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Trade and Other Receivables (Tables)

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Summary of Trade and Other Receivables

(1) Trade and other receivables as of December 31, 2022 and 2023, are as follows:

	December 31, 2022
(in millions of Korean won)	Total amounts		Provision for impairment			Present value discount			Carrying amount
Current assets
Trade receivables	￦	3,439,542	￦	(342,539	)	￦	(6,926	)	￦	3,090,077
Other receivables		3,092,261		(82,243	)		(2,023	)		3,007,995
Total	￦	6,531,803	￦	(424,782	)	￦	(8,949	)	￦	6,098,072
Non-current assets
Trade receivables	￦	408,098	￦	(1,199	)	￦	(11,540	)	￦	395,359
Other receivables		1,249,096		(136,300	)		(17,109	)		1,095,687
Total	￦	1,657,194	￦	(137,499	)	￦	(28,649	)	￦	1,491,046

	December 31, 2023
(in millions of Korean won)	Total amounts		Provision for impairment			Present value discount			Carrying amount
Current assets
Trade receivables	￦	3,596,899	￦	(330,002	)	￦	(9,165	)	￦	3,257,732
Other receivables		3,990,900		(76,089	)		(2,254	)		3,912,557
Total	￦	7,587,799	￦	(406,091	)	￦	(11,419	)	￦	7,170,289
Non-current assets
Trade receivables	￦	318,429	￦	(1,288	)	￦	(19,476	)	￦	297,665
Other receivables		1,227,929		(107,547	)		(13,879	)		1,106,503
Total	￦	1,546,358	￦	(108,835	)	￦	(33,355	)	￦	1,404,168

(2) The fair values of trade and other receivables with original maturities less than one year are equal to their carrying amounts because the discounting effect is immaterial. The fair value of trade and other receivables with original maturities longer than one year, which are mainly from sales of goods, is determined by discounting the expected future cash flow at the weighted average interest rate.

Summary of Changes in Provision for Impairment

(3) Details of changes in provision for impairment for the years ended December 31, 2022 and 2023, are as follows:

	2022						2023
(in millions of Korean won)	Trade receivables			Other receivables			Trade receivables			Other receivables
Beginning balance	￦	349,725		￦	201,387		￦	343,738		￦	218,543
Provision		64,522			65,941			69,972			114,501
Reversal		—			(850	)		—			(14,941	)
Write-off/transfer		(69,430	)		(49,904	)		(69,246	)		(129,108	)
Acquisition and disposition of businesses		(43	)		—			(310	)		(17	)
Others		(1,036	)		1,969			(12,864	)		(5,342	)
Ending balance	￦	343,738		￦	218,543		￦	331,290		￦	183,636

Summary of Other Receivables

(4) Details of other receivables as of December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	December 31, 2022			December 31, 2023
Loans	￦	98,953		￦	51,854
Receivables1		2,668,545			3,539,742
Accrued income		32,218			43,920
Refundable deposits		339,450			299,935
Loans receivable		1,013,428			1,067,005
Finance lease receivables		105,690			141,883
Others		63,941			58,357
Less: Provision for impairment		(218,543	)		(183,636	)
	￦	4,103,682		￦	5,019,060

1 As of December 31, 2023, credit sales asset of ￦2,696,505 million (December 31, 2022: ￦1,960,579 million) held by BC Card Co., Ltd. are included.

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Other Financial Assets and Liabilities (Tables)

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Summary of Other Financial Assets and Liabilities

(1) Details of other financial assets and liabilities as of December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	December 31, 2022			December 31, 2023
Other financial assets
Financial assets at amortized cost1	￦	1,060,058		￦	1,385,921
Financial assets at fair value through profit or loss1,2		1,064,856			939,661
Financial assets at fair value through other comprehensive income		1,508,192			1,680,168
Derivatives used for hedging		190,830			159,211
Less: Non-current		(2,501,484	)		(2,724,761	)
Current	￦	1,322,452		￦	1,440,200
Other financial liabilities
Financial liabilities at amortized cost3	￦	246,606		￦	915,185
Financial liabilities at fair value through profit or loss		141,280			136,106
Derivatives used for hedging		33,555			24,547
Less: Non-current		(412,650	)		(753,739	)
Current	￦	8,791		￦	322,099

1 As of December 31, 2023, the Group’s other financial assets amounting to ￦98,309 million (December 31, 2022: ￦102,215 million), which consist of checking account deposits, time deposits and others, are subject to withdrawal restrictions.

2 As of December 31, 2023, the Group provided investments in Korea Software Financial Cooperative amounting to ￦9,016 million as a collateral for the payment guarantee provided by the Cooperative.

3 The amount includes liabilities related to the obligation to acquire additional shares in Epsilon Global Communications Pte. Ltd. and MILLIE Co., Ltd and KT Cloud Co., Ltd. (Note 19).

Summary of Financial Assets at Fair Value Through Profit or Loss

1) Details of financial assets at fair value through profit or loss as of December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	December 31, 2022			December 31, 2023
Equity Instruments (Listed)	￦	26,647		￦	13,911
Equity Instruments (Unlisted)		72,517			42,185
Debt securities		942,274			880,549
Derivatives held for trading1		23,418			3,016
Total		1,064,856			939,661
Less: non-current		(609,887	)		(782,143	)
Current	￦	454,969		￦	157,518

1 According to a derivative arrangement with LS Marine Solution Co., Ltd. (formerly KT Submarine Co., Ltd.), derivative assets amounting to ￦1,015 million is included as of December 31, 2023. (Note 19).

Summary of Financial Assets at Fair Value Through Other Comprehensive Income

1) Details of financial assets at fair value through other comprehensive income as of December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	December 31, 2022			December 31, 2023
Equity Instruments (Listed)	￦	1,006,476		￦	1,231,188
Equity Instruments (Unlisted)		496,284			443,067
Debt securities		5,432			5,913
Total		1,508,192			1,680,168
Less: non-current		(1,508,192	)		(1,680,168	)
Current	￦	—		￦	—

Summary of Derivative Financial Assets and Liabilities

1) Details of valuation of derivatives used for hedging as of December 31, 2022 and 2023, are as follows:

	December 31, 2022						December 31, 2023
(in millions of Korean won)	Assets			Liabilities			Assets			Liabilities
Interest rate swap	￦	4,236		￦	—		￦	1,530		￦	191
Currency swap1		186,594			33,555			157,681			24,356
Total		190,830			33,555			159,211			24,547
Less: non-current		(147,141	)		(33,555	)		(107,802	)		(23,696	)
Current	￦	43,689		￦	—		￦	51,409		￦	851

1 The currency swap contract is to hedge the risk of variability in cash flow from the borrowings due to changes in interest rate and foreign exchange rate and the expected maximum period for the Group to be exposed to risks of cash flow fluctuation by hedged items is until September 7, 2034.

Summary of Valuation Gains and Losses on Derivatives Contracts

2) The valuation gains and losses on the derivatives contracts for the years ended December 31, 2021, 2022 and 2023, are as follows:

(in millions of Korean won)	2021						2022						2023
Type of Transaction	Valuation gain		Valuation loss		Other comprehensive income1		Valuation gain		Valuation loss		Other comprehensive income1		Valuation gain		Valuation Loss		Other comprehensive income1
Interest rate swap	￦	—	￦	—	￦	1	￦	63	￦	490	￦	4,666	￦	48	￦	—	￦	(2,945	)
Currency swap		203,961		7,206		191,569		154,611		20,723		79,781		45,709		162		(27,273	)
Currency forwards		—		—		—		—		—		754		—		—		—
Total	￦	203,961	￦	7,206	￦	191,570	￦	154,674	￦	21,213	￦	85,201	￦	45,757	￦	162	￦	(30,218	)

1 The amounts directly reflected in equity are before adjustments of deferred income tax and allocation to the non-controlling interest.

Summary of Hedging instruments

(i) Hedging instruments

(in millions of Korean won and thousands of foreign currencies)	2022
					Book value of hedging instruments				Changes in fair value to calculate the ineffective portion of hedges
Currency	Foreign currency		Contract amount		Assets		Liabilities
USD		2,111,509	￦	2,527,626	￦	160,243	￦	32,936	￦	170,856
JPY		400,000		4,357		—		409		(308	)
SGD		284,000		245,208		26,351		—		20,511
EUR		7,700		10,283		—		210		129
KRW		—		170,000		4,236		—		4,717
Total			￦	2,957,474	￦	190,830	￦	33,555	￦	195,905

(in millions of Korean won and thousands of foreign currencies)	2023
					Book value of hedging instruments				Changes in fair value to calculate the ineffective portion of hedges
Currency	Foreign currency		Contract amount		Assets		Liabilities
USD		2,011,509	￦	2,417,473	￦	157,681	￦	23,465	￦	44,413
JPY		400,000		4,357		—		660		(162	)
EUR		7,700		10,283		—		231		381
KRW		—		240,000		1,530		191		707
Total		—	￦	2,672,113	￦	159,211	￦	24,547	￦	45,339

Summary of Hedged items

(ii) Hedged item

(in millions of Korean won)
	2022								2023
Currency	Book value of hedged items		Changes in fair value to calculate the ineffective portion of hedges			Cash flow hedge reserves1			Book value of hedged items		Changes in fair value to calculate the ineffective portion of hedges			Cash flow hedge reserves1
USD	￦	2,675,885	￦	(170,010	)	￦	(13,947	)	￦	2,593,707	￦	(44,365	)	￦	(30,415	)
JPY		3,813		308			116			3,651		162			49
SGD		267,843		(18,720	)		3,406			—		—			—
EUR		10,404		(121	)		582			10,985		(581	)		158
KRW		101,035		(4,655	)		4,385			239,944		(596	)		1,315
Total	￦	3,058,980	￦	(193,198	)	￦	(5,458	)	￦	2,848,287	￦	(45,380	)	￦	(28,893	)

1 The amount is after the deferred tax directly added or subtracted to the capital is reflected.

Summary of Financial Liabilities at Fair Value Through Profit or Loss

1) Details of financial liabilities at fair value through profit or loss as of December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	December 31, 2022		December 31, 2023
Derivatives held for trading 1,2	￦	141,280	￦	136,106

1 In relation to the additional acquisition of shares of the equity method investee K Bank Inc in 2021, the Group has entered into a shareholder agreement with the shareholders of K Bank Inc. According to the shareholder agreement, if K Bank Inc fails to be listed on the terms agreed in the shareholder agreement, the shareholders of K Bank Inc may exercise their Drag-Along right to the Group and require the Group to sell all the shares owned by such shareholders in K Bank to third parties based on the guaranteed return agreed in the shareholder agreement. The shareholder agreement also includes a call option where, if the shareholders exercise their Drag-Along rights, the Group has an option to purchase the shares held by those shareholders. As of December 31, 2023, the derivative financial liability in accordance with IFRS 9 associated with the rights prescribed in the shareholders agreement was ￦133,293 million(￦134,881 million as of December 31 2022).

2 The amount includes derivatives separated from convertible bonds issued by the Group (Note 15).

Summary of Valuation Gain and Loss on Financial Liabilities at Fair Value Through Profit or Loss

2) The valuation gain and loss on financial liabilities at fair value through profit or loss for the years ended December 31, 2021, 2022 and 2023, are as follows:

2021

2022

2023

(in millions of Korean won)

Valuation gain

Valuation loss

Valuation gain

Valuation loss

Valuation gain

Valuation loss

Derivatives liabilities held for trading

￦

51,187

￦

8,741

￦

24,683

￦

1,800

￦

3,316

￦

10,710

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Inventories (Tables)

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Summary of Inventories Net

Inventories as at December 31, 2022 and 2023, are as follows:

	December 31, 2022							December 31, 2023
(in millions of Korean won)	Acquisition cost		Valuation allowance			Book amount		Acquisition cost		Valuation Allowance			Book amount
Merchandise	￦	768,748	￦	(96,010	)	￦	672,738	￦	981,127	￦	(102,215	)	￦	878,912
Others		44,935		—			44,935		109,439		—			109,439
Total	￦	813,683	￦	(96,010	)	￦	717,673	￦	1,090,566	￦	(102,215	)	￦	988,351

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Other Assets and Liabilities (Tables)

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Summary of Other Assets and Liabilities

Other assets and liabilities as at December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	December 31, 2022			December 31, 2023
Other assets
Advance payments	￦	181,150		￦	217,997
Prepaid expenses		107,775			146,628
Contract cost		1,817,678			1,727,468
Contract assets		802,253			832,520
Others		12,964			15,237
Less: Non-current		(820,608	)		(827,297	)
Current	￦	2,101,212		￦	2,112,553
Other liabilities
Advances received1	￦	387,986		￦	682,880
Withholdings		155,017			159,080
Unearned revenue1		46,493			27,392
Lease liabilities		1,172,038			1,179,909
Contract liabilities		284,107			278,749
Others		33,108			30,848
Less: Non-current		(945,731	)		(950,015	)
Current	￦	1,133,018		￦	1,408,843

1 The amounts include adjustments arising from adoption of IFRS 15 Revenue from Contracts with Customers (Note 25).

XML

Property and Equipment (Tables)

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Summary of Changes in Property and Equipment

(1) Changes in property and equipment for the years ended December 31, 2022 and 2023, are as follows:

	2022
(in millions of Korean won)	Land			Buildings and structures			Machinery and equipment			Others			Construction- in-progress			Total
Acquisition cost	￦	1,315,929		￦	4,707,250		￦	40,270,005		￦	1,607,853		￦	1,094,479		￦	48,995,516
Less: Accumulated depreciation (including accumulated impairment loss and others)		(132	)		(2,189,828	)		(30,953,434	)		(1,386,615	)		(621	)		(34,530,630	)
Beginning, net		1,315,797			2,517,422			9,316,571			221,238			1,093,858			14,464,886
Acquisition and capital expenditure		11,392			32,030			129,754			67,921			3,105,283			3,346,380
Disposal and termination		(2,556	)		(4,338	)		(76,608	)		(4,695	)		(3,926	)		(92,123	)
Depreciation		—			(147,620	)		(2,413,191	)		(79,376	)		—			(2,640,187	)
Impairment		—			—			(6,084	)		(7,825	)		(2,247	)		(16,156	)
Transfer in (out)1		24,647			230,955			2,660,753			31,036			(3,010,193	)		(62,802	)
Transfer from (to) investment properties		(63,278	)		(140,229	)		—			—			(2,676	)		(206,183	)
Acquisition and disposition of businesses		—			—			(4,386	)		(481	)		(3,720	)		(8,587	)
Others		(13,194	)		66,341			7,020			(4,382	)		(68,834	)		(13,049	)
Ending, net	￦	1,272,808		￦	2,554,561		￦	9,613,829		￦	223,436		￦	1,107,545		￦	14,772,179
Acquisition cost	￦	1,272,940		￦	4,830,853		￦	42,091,573		￦	1,276,779		￦	1,108,043		￦	50,580,188
Less: Accumulated depreciation (including accumulated impairment loss and others)		(132	)		(2,276,292	)		(32,477,744	)		(1,053,343	)		(498	)		(35,808,009	)

1 The amounts include the transferred amount to Intangible Assets account.

	2023
(in millions of Korean won)	Land			Buildings and structures			Machinery and equipment			Others			Construction- in-progress			Total
Acquisition cost	￦	1,272,940		￦	4,830,853		￦	42,091,573		￦	1,276,779		￦	1,108,043		￦	50,580,188
Less: Accumulated depreciation (including accumulated impairment loss and others)		(132	)		(2,276,292	)		(32,477,744	)		(1,053,343	)		(498	)		(35,808,009	)
Beginning, net		1,272,808			2,554,561			9,613,829			223,436			1,107,545			14,772,179
Acquisition and capital expenditure		844			5,072			75,412			78,400			3,029,380			3,189,108
Disposal and termination		(3,651	)		(5,012	)		(70,418	)		(1,711	)		(327	)		(81,119	)
Depreciation		—			(148,981	)		(2,495,402	)		(75,900	)		—			(2,720,283	)
Impairment		—			—			(6,577	)		(1	)		(1,294	)		(7,872	)
Transfer in (out)1		58,790			151,157			2,706,444			16,407			(3,092,670	)		(159,872	)
Transfer from (to) investment properties		(37,725	)		(88,336	)		—			—			(189	)		(126,250	)
Acquisition and disposition of businesses		18,761			49,532			(14,981	)		(44,543	)		(3,205	)		5,564
Others		14,549			137			(1,628	)		(7,742	)		(4,692	)		624
Ending, net	￦	1,324,376		￦	2,518,130		￦	9,806,679		￦	188,346		￦	1,034,548		￦	14,872,079
Acquisition cost	￦	1,324,508		￦	4,903,073		￦	43,611,280		￦	1,182,144		￦	1,035,198		￦	52,056,203
Less: Accumulated depreciation (including accumulated impairment loss and others)		(132	)		(2,384,943	)		(33,804,601	)		(993,798	)		(650	)		(37,184,124	)

1 The amounts include the transferred amount to Intangible Assets account.

Summary of the Details of Property and Equipment and Investment Properties Provided

(2) Details of property and equipment and investment properties provided as collateral as of December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	December 31, 2022
	Carrying amount		Secured amount		Related line item		Related amount		Secured party
Land and Buildings	￦	13,899	￦	19,100		Borrowings	￦	6,000		Industrial Bank of Korea, etc.
Land and Buildings	￦	460,166	￦	61,733		Deposits	￦	52,662		Lessee
(in millions of Korean won)	December 31, 2023
	Carrying amount		Secured amount		Related line item		Related amount		Secured party
Land and Buildings	￦	81,057	￦	64,680		Borrowings	￦	54,900		Industrial Bank of Korea, etc.
Land and Buildings	￦	555,921	￦	64,877		Deposits	￦	55,965		Lessee

XML

Investment Properties (Tables)

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Summary of Investment Properties

(1) Changes in investment properties for the years ended December 31, 2022 and 2023, are as follows:

	2022
(in millions of Korean won)	Land			Buildings			Construction- in-progress			Total
Acquisition cost	￦	815,331		￦	1,424,066		￦	66,801		￦	2,306,198
Less: Accumulated depreciation		(1,568	)		(583,976	)		—			(585,544	)
Beginning, net		813,763			840,090			66,801			1,720,654
Acquisition		14,569			17,351			55,478			87,398
Disposal and termination		(14,725	)		(5,858	)		(17	)		(20,600	)
Depreciation		—			(47,004	)		—			(47,004	)
Transfer from(to) property and equipment		63,278			140,229			2,676			206,183
Transfer and others		2,907			(28,350	)		12,170			(13,273	)
Ending, net	￦	879,792		￦	916,458		￦	137,108		￦	1,933,358
Acquisition cost	￦	881,360		￦	1,577,736		￦	137,108		￦	2,596,204
Less: Accumulated depreciation		(1,568	)		(661,278	)		—			(662,846	)

	2023
(in millions of Korean won)	Land			Buildings			Construction- in-progress			Total
Acquisition cost	￦	881,360		￦	1,577,736		￦	137,108		￦	2,596,204
Less: Accumulated depreciation		(1,568	)		(661,278	)		—			(662,846	)
Beginning, net		879,792			916,458			137,108			1,933,358
Acquisition		—			57,529			153,279			210,808
Disposal and termination		(8,167	)		(9,323	)		—			(17,490	)
Depreciation		—			(52,869	)		—			(52,869	)
Transfer from(to) property and equipment		37,725			88,336			189			126,250
Transfer and others		1			27,544			(29,467	)		(1,922	)
Ending, net	￦	909,351		￦	1,027,675		￦	261,109		￦	2,198,135
Acquisition cost	￦	910,919		￦	1,750,677		￦	261,109		￦	2,922,705
Less: Accumulated depreciation		(1,568	)		(723,002	)		—			(724,570	)

XML

Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Summary of Intangible Assets

(1) Changes in intangible assets for the years ended December 31, 2022 and 2023, are as follows:

	2022
(in millions of Korean won)	Goodwill			Development costs			Software			Frequency usage rights			Others			Total
Acquisition cost	￦	1,002,530		￦	1,812,377		￦	1,083,426		￦	2,617,647		￦	1,426,576		￦	7,942,556
Less: Accumulated amortization (including accumulated impairment loss and others)		(305,658	)		(1,584,004	)		(944,001	)		(778,516	)		(883,044	)		(4,495,223	)
Beginning, net	￦	696,872		￦	228,373		￦	139,425		￦	1,839,131		￦	543,532		￦	3,447,333
Acquisition and capital expenditure		19,455			45,997			55,651			—			225,886			346,989
Disposal and termination		—			(5,503	)		(48	)		—			(20,117	)		(25,668	)
Amortization		—			(93,374	)		(54,748	)		(350,265	)		(128,874	)		(627,261	)
Impairment		(24,006	)		(744	)		(508	)		—			(5,416	)		(30,674	)
Acquisition and disposition of businesses		—			(2,320	)		(802	)		—			(7,144	)		(10,266	)
Others		15,902			(573	)		16,106			(610	)		(1,445	)		29,380
Ending, net	￦	708,223		￦	171,856		￦	155,076		￦	1,488,256		￦	606,422		￦	3,129,833
Acquisition cost		1,037,887			1,803,687			1,156,951			2,617,707			1,532,061			8,148,293
Less: Accumulated amortization (including accumulated impairment loss and others)		(329,664	)		(1,631,831	)		(1,001,875	)		(1,129,451	)		(925,639	)		(5,018,460	)

	2023
(in millions of Korean won)	Goodwill			Development costs			Software			Frequency usage rights			Others			Total
Acquisition cost	￦	1,037,887		￦	1,803,687		￦	1,156,951		￦	2,617,707		￦	1,532,061		￦	8,148,293
Less: Accumulated amortization (including accumulated impairment loss and others)		(329,664	)		(1,631,831	)		(1,001,875	)		(1,129,451	)		(925,639	)		(5,018,460	)
Beginning, net		708,223			171,856			155,076			1,488,256			606,422			3,129,833
Acquisition and capital expenditure1		—			33,078			38,603			37			238,019			309,737
Disposal and termination		—			(4,812	)		(397	)		—			(6,431	)		(11,640	)
Amortization 2		—			(63,052	)		(52,265	)		(350,276	)		(226,316	)		(691,909	)
Impairment		(230,352	)		(128	)		(16	)		—			(5,711	)		(236,207	)
Acquisition and disposition of businesses		6,207			—			(108	)		—			(69	)		6,030
Others		4,349			1,658			11,769			175			10,066			28,017
Ending, net	￦	488,427		￦	138,600		￦	152,662		￦	1,138,192		￦	615,980		￦	2,533,861
Acquisition cost	￦	1,036,354		￦	1,790,446		￦	1,196,329		￦	2,415,243		￦	1,725,087		￦	8,163,459
Less: Accumulated amortization (including accumulated impairment loss and others)		(547,927	)		(1,651,846	)		(1,043,667	)		(1,277,051	)		(1,109,107	)		(5,629,598	)

1 The amounts include the transferred amount from Property and Equipment account.

2 Amounts include ￦52,179 million which is the changed effect of useful life from Media Contents asset.

(2) Goodwill, amounting to ￦ 212,910 million, is not subject to amortization as of December 31, 2023 (December 31, 2022: ￦ 210,114 million).

Summary of Goodwill Allocated to Each Cash-Generation Unit

(3) Goodwill is allocated to the Group’s cash-generating unit which is identified by operating segments. As of December 31, 2023, goodwill allocated to each cash-generating unit is as follows:

(in millions of Korean won)
Cash generating Unit	Amount
Mobile services1,9	￦	65,057
BC Card Co., Ltd.2		41,234
HCN Co., Ltd. 3		130,242
GENIE Music Corporation 4		50,214
MILLIE Co., Ltd.5		54,725
PlayD Co., Ltd. 6		40,068
KT Telecop Co., Ltd. 7		15,418
Epsilon Global Communications Pte. Ltd. 8		45,670
KT MOS Bukbu Co., Ltd and others		45,799
Total	￦	488,427

1 The recoverable amounts of mobile services business are calculated based on value-in use calculations. These calculations use discounted cash flow projections for the next five years based on financial budgets. A terminal growth rate of 0.0% was applied for the cash flows expected to be incurred after five years. This growth rate does not exceed the average growth rate of the industry which the cash-generating unit belongs in. The Group estimated its revenue growth rate 0.56% based on past performance and its expectation of future market changes. In addition, management estimated the cash flow based on past performance and its expectation of market growth, and the discount rates 6.68% used reflected specific risks relating to the relevant CGU. As a result of the impairment test, the Group concluded that the carrying amount of CGU does not exceed the recoverable amount. Accordingly, the Group did not recognize an impairment loss on goodwill on mobile business for the years ended December 31, 2021, 2022 and 2023.

2 The recoverable amounts of BC Card Co., Ltd. are calculated based on value-in use calculations. These calculations use discounted cash flow projections for the next five years based on financial budgets. A terminal growth rate of 0.0% was applied for the cash flows expected to be incurred after five years. This growth rate does not exceed the average growth rate of the industry which the cash-generating unit belongs in. The Group estimated its revenue growth rate 0.04% based on past performance and its expectation of future market changes. In addition, management estimated the cash flow based on past performance and its expectation of market growth, and the discount rates 5.22% used reflected specific risks relating to the relevant CGU. As a result of the impairment test, the Group concluded that the carrying amount of CGU does not exceed the recoverable amount. Accordingly, the Group did not recognize an impairment loss on goodwill on BC Card Co., Ltd. for the years ended December 31, 2021, 2022 and 2023.

3 The recoverable amounts of HCN Co., Ltd. are calculated based on value-in use calculations. These calculations use discounted cash flow projections for the next five years based on financial budgets. A terminal growth rate of 0.0% was applied for the cash flows expected to be incurred after five years. This growth rate does not exceed the average growth rate of the industry which the cash-generating unit belongs in. The Group estimated its revenue growth rate 2.21% based on past performance and its expectation of future market changes. In addition, management estimated the cash flow based on past performance and its expectation of market growth, and the discount rates 11.37% used reflected specific risks relating to the relevant CGU. As a result of the impairment test, HCN’s recoverable amount was KRW 130,242 million, which was less than the carrying amount, and KRW 98,432 million of the impairment loss was recorded as goodwill in full and reflected in operating expenses.

4 The recoverable amounts of GENIE Music Corporation are calculated based on value-in use calculations. These calculations use discounted cash flow projections for the next five years based on financial budgets. A terminal growth rate of 0.0% was applied for the cash flows expected to be incurred after five years. This growth rate does not exceed the average growth rate of the industry which the cash-generating unit belongs in. The Group estimated its revenue growth rate 4.51% based on past performance and its expectation of future market changes. In addition, management estimated the cash flow based on past performance and its expectation of market growth, and the discount rates 16.73% used reflected specific risks relating to the relevant CGU. As a result of the impairment test, the Group concluded that the carrying amount of CGU does not exceed the recoverable amount. Accordingly, the Group did not recognize an impairment loss on goodwill on GENIE Music Corporation for the years ended December 31, 2023.

5 The recoverable amounts of MILLIE Co., Ltd. are calculated based on value-in use calculations. These calculations use discounted cash flow projections for the next four years based on financial budgets. A terminal growth rate of 1.0% was applied for the cash flows expected to be incurred after four years. This growth rate does not exceed the average growth rate of the industry which the cash-generating unit belongs in. The Group estimated its revenue growth rate 9.96% based on past performance and its expectation of future market changes. In addition, management estimated the cash flow based on past performance and its expectation of market growth, and the discount rates 22.48% used reflected specific risks relating to the relevant CGU. As a result of the impairment test, the Group concluded that the carrying amount of CGU does not exceed the recoverable amount. Accordingly, the Group did not recognize an impairment loss on goodwill on MILLIE Co., Ltd. for the years ended December 31, 2023.

6 The recoverable amount of PlayD Co., Ltd is calculated based on fair value less cost to sell.

7 The recoverable amounts of KT Telecop Co., Ltd. are calculated based on value-in use calculations. These calculations use discounted cash flow projections for the next five years based on financial budgets. A terminal growth rate of 1.0% was applied for the cash flows expected to be incurred after five years. This growth rate does not exceed the average growth rate of the industry which the cash-generating unit belongs in. The Group estimated its revenue growth rate 3.54% based on past performance and its expectation of future market changes. In addition, management estimated the cash flow based on past performance and its expectation of market growth, and the discount rates 9.04% used reflected specific risks relating to the relevant CGUs. As a result of the impairment test, the Group concluded that the carrying amount of CGU does not exceed the recoverable amount. Accordingly, the Group did not recognize an impairment loss on goodwill on KT Telecop Co., Ltd. for the years ended December 31, 2021, 2022 and 2023.

8 The recoverable amounts of Epsilon Global Communications Pte. Ltd. are calculated based on value-in use calculations. These calculations use discounted cash flow projections for the next nine years based on financial budgets. A terminal growth rate of 1.0% was applied for the cash flows expected to be incurred after nine years. This growth rate does not exceed the average growth rate of the industry which the cash-generating unit belongs in. The Group estimated its revenue growth rate 10.57% based on past performance and its expectation of future market changes. In addition, management estimated the cash flow based on past performance and its expectation of market growth, and the discount rates 8.84% used reflected specific risks relating to the relevant CGU. As a result of the impairment test, Epsilon Global Communications’s recoverable amount was KRW 45,670 million, which was less than the carrying amount, and KRW 118,609 million of the impairment loss was recorded as goodwill in full and reflected in operating expenses.

9 The Group performed its impairment assessment for long-lived assets attributed to the Information and Communication Technology (“ICT”) reporting segment, which includes the Cash-Generating Units of Mobile, Fixed line, and Corporate Services (the “CGUs”). The Group compared the carrying value of each CGU to the estimated recoverable amount. The recoverable amounts of ICT reporting segment are calculated based on value-in use calculations. These calculations use discounted cash flow projections for the next five years based on financial budgets. A terminal growth rate of 0.0% was applied for the cash flows expected to be incurred after five years. This growth rate does not exceed the average growth rate of the industry which the cash-generating unit belongs in. The Group estimated its revenue growth rate 0.56% ~ 9.14% based on past performance and its expectation of future market changes. In addition, management estimated the cash flow based on past performance and its expectation of market growth, and the discount rate 6.68%. Accordingly, the Group did not recognize an impairment loss on ICT reporting segment for the years ended December 31, 2021, 2022 and 2023.

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Investments in Associates and Joint Ventures (Tables)

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Summary of Details of Associates

(1) Details of associates as of December 31, 2022 and 2023, are as follows:

	Percentage of ownership (%)						Location		Closing month
	December 31, 2022			December 31, 2023
KIF Investment Fund		33.3	%		33.3	%		Korea		December
K Bank Inc.		33.7	%		33.7	%		Korea		December
HD Hyundai Robotics Co., Ltd. (formerly Hyundai Robotics Co., Ltd.)1		10.0	%		10.0	%		Korea		December
Megazone Cloud Corporation1		6.8	%		6.8	%		Korea		December
IGIS No. 468-1 General Private Real Estate Investment Company		44.6	%		44.6	%		Korea		December
KT-DSC Creative Economy Youth Start-up Investment Fund		28.6	%		28.6	%		Korea		December
IGIS Professional Investors Private Investment Real Estate Investment LLCNo 395		35.3	%		35.3	%		Korea		December
LS Marine Solution Co., Ltd (formerly KT Submarine Co., Ltd.).1, 2		32.9	%		7.3	%		Korea		December

1 As of December 31, 2023, although the Group has less than 20% ownership in ordinary share, this entity is included in investments in associates as the Group has significant influence in determining the operational and financial policies.

Summary of Changes in Investments in Associates and Joint Ventures

(2) Changes in investments in associates and joint ventures for the years ended December 31, 2022 and 2023, are as follows:

	2022
(in millions of Korean won)	Beginning		Acquisition (Disposal)		Share of net profit (loss) from associates and joint ventures			Others			Ending
KIF Investment Fund	￦	178,935	￦	—	￦	2,502		￦	(10,458	)	￦	170,979
K Bank Inc.		831,737		—		29,010			(7,991	)		852,756
HD Hyundai Robotics Co., Ltd. (formerly Hyundai Robotics Co., Ltd.)		48,725		—		798			(151	)		49,372
Megazone Cloud Corporation		—		130,001		(22,555	)		28,753			136,199
IGIS No. 468-1 General Private Real Estate Investment Company		—		25,000		(1,411	)		—			23,589
KT-DSC Creative Economy Youth Start-up Investment Fund		22,138		—		(13	)		(2	)		22,123
IGIS Professional Investors Private Investment Real Estate Investment LLC No. 395		17,084		—		(464	)		—			16,620
Others		189,810		100,040		(24,688	)		(56,078	)		209,084
	￦	1,288,429	￦	255,041	￦	(16,821	)	￦	(45,927	)	￦	1,480,722

	2023
(in millions of Korean won)	Beginning		Acquisition (Disposal)			Share of net profit (loss) from associates and joint ventures1			Others			Ending
KIF Investment Fund	￦	170,979	￦	—		￦	5,443		￦	632		￦	177,054
K Bank Inc.		852,756		—			1,089			19,036			872,881
HD Hyundai Robotics Co., Ltd. (formerly Hyundai Robotics Co., Ltd.)		49,372		—			(1,637	)		(1	)		47,734
Megazone Cloud Corporation		136,199		—			(4,583	)		78			131,694
IGIS No. 468-1 General Private Real Estate Investment Company		23,589		—			(105	)		—			23,484
KT-DSC Creative Economy Youth Start-up Investment Fund		22,123		(500	)		3,494			—			25,117
IGIS Professional Investors Private Investment Real Estate Investment LLC No 395		16,620		—			(4,678	)		—			11,942
LS Marine Solution Co., Ltd (formerly KT Submarine Co., Ltd.)		—		—			255			23,237	1		23,492
Others		209,084		101,887			(34,912	)		(32,568	)		243,491
	￦	1,480,722	￦	101,387		￦	(35,634	)	￦	10,414		￦	1,556,889

1 The amount represents the fair value of investment at the time the Company lost control (Refer to note above).

Summary of Financial Information of Associates and Joint Ventures

(3) Summarized financial information of associates and joint ventures as at and for the years ended December 31, 2022 and 2023, is as follows:

(in millions of Korean won)	December 31, 2022
	Current assets		Non-current assets		Current liabilities		Non-current liabilities
KIF Investment Fund	￦	98,132	￦	414,804	￦	—	￦	—
K Bank Inc.		16,562,742		71,265		14,830,983		2,168
HD Hyundai Robotics Co., Ltd. (formerly Hyundai Robotics Co., Ltd.).		278,413		135,380		63,009		64,335
Megazone Cloud Corporation		857,089		202,767		330,619		94,202
IGIS No. 468-1 General Private Real Estate Investment Company		52,851		—		12		—
KT-DSC Creative Economy Youth Start-up Investment Fund		908		76,884		362		—
IGIS Professional Investors Private Investment Real Estate Investment LLC No. 395		9,344		127,321		90,545		—

(in millions of Korean won)	December 31, 2023
	Current assets		Non-current assets		Current liabilities		Non-current liabilities
KIF Investment Fund	￦	128,344	￦	402,819	￦	—	￦	—
K Bank Inc.		21,320,790		89,812		19,541,076		4,516
HD Hyundai Robotics Co., Ltd. (formerly Hyundai Robotics Co., Ltd.)		251,868		134,424		106,557		9,775
Megazone Cloud Corporation		874,778		267,605		341,679		205,087
IGIS No. 468-1 General Private Real Estate Investment Company		2,985		49,631		11		—
KT-DSC Creative Economy Youth Start-up Investment Fund		482		87,528		101		—
IGIS Professional Investors Private Investment Real Estate Investment LLC No 395		5,690		145,769		107,553		—
LS Marine Solution Co., Ltd. (formerly KT Submarine Co., Ltd.)		66,767		80,307		23,906		207

(in millions of Korean won)	2022
	Operating revenue		Profit (loss) for the year			Other comprehensive income (loss)			Total comprehensive income (loss)			Dividends received from associates
KIF Investment Fund	￦	19,916	￦	7,505		￦	(11,779	)	￦	(4,274	)	￦	6,531
K Bank Inc.		558,872		86,498			(24,888	)		61,610			—
HD Hyundai Robotics Co., Ltd. (formerly Hyundai Robotics Co., Ltd.).		181,944		9,332			(49	)		9,283			—
Megazone Cloud Corporation		1,261,228		(293,186	)		(6,609	)		(299,795	)		—
IGIS No. 468-1 General Private Real Estate Investment Company		9		(3,161	)		—			(3,161	)		—
KT-DSC Creative Economy Youth Start-up Investment Fund		19,931		(53	)		—			(53	)		—
IGIS Professional Investors Private Investment Real Estate Investment LLC No. 395		—		(474	)		—			(474	)		—

(in millions of Korean won)	2023
	Operating revenue		Profit (loss) for the year			Other comprehensive income (loss)			Total comprehensive income (loss)			Dividends received from associates
KIF Investment Fund	￦	33,017	￦	16,330		￦	—		￦	16,330		￦	1,139
K Bank Inc.		946,559		10,560			56,609			67,169			—
HD Hyundai Robotics Co., Ltd. (formerly Hyundai Robotics Co., Ltd.).		167,949		(17,513	)		(1,093	)		(18,606	)		—
Megazone Cloud Corporation		1,410,078		(34,760	)		(3,021	)		(37,781	)		—
IGIS No. 468-1 General Private Real Estate Investment Company		6		(234	)		—			(234	)		—
KT-DSC Creative Economy Youth Start-up Investment Fund		19,849		12,227			—			12,227			—
IGIS Professional Investors Private Investment Real Estate Investment LLC No 395		—		(406	)		—			(406	)		—
LS Marine Solution Co., Ltd (formerly KT Submarine Co., Ltd.)		70,779		11,618			(289	)		11,329			—

Summary of Reconciliation of Carrying Amount of Interests in the Associates and Joint Ventures

(4) Details of a reconciliation of the summarized financial information to the carrying amount of interests in the associates and joint ventures as at and for the years ended December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	2022
	Net assets (a)		Percentage of ownership (b)			Share in net assets (c)=(a)x(b)		Intercompany transaction and others (d)		Book amount (c)+(d)
KIF Investment Fund	￦	512,936		33.33	%	￦	170,979	￦	—	￦	170,979
K Bank Inc.		1,800,856		33.72	%		607,276		245,480		852,756
HD Hyundai Robotics Co., Ltd. (formerly Hyundai Robotics Co., Ltd.)		286,449		10.00	%		28,645		20,727		49,372
Megazone Cloud Corporation		635,035		6.83	%		43,360		92,839		136,199
IGIS No. 468-1 General Private Real Estate Investment Company		52,839		44.64	%		23,589		—		23,589
KT-DSC Creative Economy Youth Start-up Investment Fund		77,430		28.57	%		22,123		—		22,123
IGIS Professional Investors Private Investment Real Estate Investment LLC No. 395		46,120		35.29	%		16,278		342		16,620

(in millions of Korean won)	2023
	Net assets (a)		Percentage of ownership (b)			Share in net assets (c)=(a)x(b)		Intercompany transaction and others (d)			Book amount (c)+(d)
KIF Investment Fund	￦	531,164		33.33	%	￦	177,054	￦	—		￦	177,054
K Bank Inc.		1,865,010		33.72	%		628,910		243,971			872,881
HD Hyundai Robotics Co., Ltd. (formerly Hyundai Robotics Co., Ltd.)		269,960		10.00	%		26,996		20,738			47,734
Megazone Cloud Corporation		547,786		6.83	%		37,404		94,290			131,694
IGIS No. 468-1 General Private Real Estate Investment Company		52,605		44.64	%		23,484		—			23,484
KT-DSC Creative Economy Youth Start-up Investment Fund		87,908		28.57	%		25,117		—			25,117
IGIS Professional Investors Private Investment Real Estate Investment LLC No 395		43,905		35.29	%		15,496		(3,554	)		11,942
LS Marine Solution Co., Ltd (formerly KT Submarine Co., Ltd.)		122,961		7.30	%		8,972		14,520			23,492

XML

Trade and Other Payables (Tables)

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Summary of Trade and Other Payables

(1) Details of trade and other payables as of December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	December 31, 2022		December 31, 2023
Current liabilities
Trade payables	￦	1,150,515	￦	1,297,752
Other payables		6,182,650		6,757,170
Total	￦	7,333,165	￦	8,054,922
Non-current liabilities
Trade payables	￦	—	￦	3,202
Other payables		1,064,099		816,356
Total	￦	1,064,099	￦	819,558

Summary of Other Payables

(2) Details of other payables as of December 31, 2022 and 2023 are as follows:

(in millions of Korean won)	December 31, 2022			December 31, 2023
Non-trade payables1	￦	4,981,300		￦	5,207,165
Accrued expenses		1,234,023			1,267,700
Operating deposits		818,603			880,810
Others		212,823			217,851
Less: non-current		(1,064,099	)		(816,356	)
Current	￦	6,182,650		￦	6,757,170

1 As of December 31, 2023, credit sale liabilities amounting to ￦2,314,077 million (December 31, 2022: ￦1,754,075 million) held by BC Card Co., Ltd. (a subsidiary of the Group) are included.

XML

Borrowings (Tables)

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Summary of Borrowings

(in millions of Korean won and foreign currencies in thousands)				December 31, 2022				December 31, 2023
Type	Maturity		Annual interest rates	Foreign currency		Korean won		Foreign currency		Korean won
MTNP notes1		Sep. 7, 2034	6.500%		USD 100,000	￦	126,730		USD 100,000	￦	128,940
MTNP notes		Jul. 18, 2026	2.500%		USD 400,000		506,920		USD 400,000		515,760
MTNP notes		Aug. 23, 2023	—		USD 100,000		126,730		—		—
MTNP notes		Jul. 19, 2024	0.330%		JPY 400,000		3,813		JPY 400,000		3,651
MTNP notes		Sep. 1. 2025	1.000%		USD 400,000		506,920		USD 400,000		515,760
FR notes2		Nov. 1, 2024	Compounded SOFR+1.210%		USD 350,000		443,555		USD 350,000		451,290
FR notes		Jun. 19, 2023	—		SGD 284,000		267,843		—		—
MTNP notes		Jan. 21, 2027	1.375%		USD 300,000		380,190		USD 300,000		386,820
MTNP notes		Aug. 08, 2025	4.000%		USD 500,000		633,650		USD 500,000		644,700
The 183-3rd Public bond		Dec. 22, 2031	4.270%		—		160,000		—		160,000
The 184-2nd Public bond		Apr. 10, 2023	—		—		190,000		—		—
The 184-3rd Public bond		Apr. 10, 2033	3.170%		—		100,000		—		100,000
The 186-3rd Public bond		Jun. 26, 2024	3.418%		—		110,000		—		110,000
The 186-4th Public bond		Jun. 26, 2034	3.695%		—		100,000		—		100,000
The 187-3rd Public bond		Sep. 2, 2024	3.314%		—		170,000		—		170,000
The 187-4th Public bond		Sep. 2, 2034	3.546%		—		100,000		—		100,000
The 188-2nd Public bond		Jan. 29, 2025	2.454%		—		240,000		—		240,000
The 188-3rd Public bond		Jan. 29, 2035	2.706%		—		50,000		—		50,000
The 189-3rd Public bond		Jan. 28, 2026	2.203%		—		100,000		—		100,000
The 189-4th Public bond		Jan. 28, 2036	2.351%		—		70,000		—		70,000
The 190-2nd Public bond		Jan. 30, 2023	—		—		150,000		—		—
The 190-3rd Public bond		Jan. 30, 2028	2.947%		—		170,000		—		170,000
The 190-4th Public bond		Jan. 30, 2038	2.931%		—		70,000		—		70,000
The 191-2nd Public bond		Jan. 15, 2024	2.088%		—		80,000		—		80,000
The 191-3rd Public bond		Jan. 15, 2029	2.160%		—		110,000		—		110,000
The 191-4th Public bond		Jan. 14, 2039	2.213%		—		90,000		—		90,000
The 192-2nd Public bond		Oct. 11, 2024	1.578%		—		100,000		—		100,000
The 192-3rd Public bond		Oct. 11, 2029	1.622%		—		50,000		—		50,000
The 192-4th Public bond		Oct. 11, 2039	1.674%		—		110,000		—		110,000
The 193-1st Public bond		Jun. 16, 2023	—		—		150,000		—		—
The 193-2nd Public bond		Jun. 17, 2025	1.434%		—		70,000		—		70,000
The 193-3rd Public bond		Jun. 17, 2030	1.608%		—		20,000		—		20,000
The 193-4th Public bond		Jun. 15, 2040	1.713%		—		60,000		—		60,000

(in millions of Korean won and foreign currencies in thousands)				December 31, 2022				December 31, 2023
Type	Maturity		Annual interest rates	Foreign currency		Korean won		Foreign currency		Korean won
The 194-1st Public bond		Jan. 26, 2024	1.127%		—		130,000		—		130,000
The 194-2nd Public bond		Jan. 27, 2026	1.452%		—		140,000		—		140,000
The 194-3rd Public bond		Jan. 27, 2031	1.849%		—		50,000		—		50,000
The 194-4th Public bond		Jan. 25, 2041	1.976%		—		80,000		—		80,000
The 195-1st Public bond		Jun. 10, 2024	1.387%		—		180,000		—		180,000
The 195-2nd Public bond		Jun. 10, 2026	1.806%		—		80,000		—		80,000
The 195-3rd Public bond		Jun. 10, 2031	2.168%		—		40,000		—		40,000
The 196-1st Public bond		Jan. 27, 2025	2.596%		—		270,000		—		270,000
The 196-2nd Public bond		Jan. 27, 2027	2.637%		—		100,000		—		100,000
The 196-3rd Public bond		Jan. 27, 2032	2.741%		—		30,000		—		30,000
The 197-1st Public bond		Jun. 27, 2025	4.191%		—		280,000		—		280,000
The 197-2nd Public bond		Jun. 29, 2027	4.188%		—		120,000		—		120,000
The 198-1st Public bond		Jan. 10, 2025	3.847%		—		—		—		70,000
The 198-2nd Public bond		Jan. 12, 2026	3.869%		—		—		—		150,000
The 198-3rd Public bond		Jan. 12, 2028	3.971%		—		—		—		80,000
The 199-1st Public bond		Jul. 11, 2025	4.028%		—		—		—		85,000
The 199-2nd Public bond		Jul. 10, 2026	4.146%		—		—		—		160,000
The 199-3rd Public bond		Jul. 12, 2028	4.221%		—		—		—		155,000
The 18-1st unsecured bond		Jul. 2, 2024	1.844%		—		100,000		—		100,000
The 18-2nd unsecured bond		Jul. 2, 2026	2.224%		—		50,000		—		50,000
The 148th Won-denominated unsecured bond		Jun. 23, 2023	—		—		100,000		—		—
The 149-1st Won-denominated unsecured bond		Mar. 8, 2024	1.440%		—		70,000		—		70,000
The 149-2nd Won-denominated unsecured bond		Mar. 10, 2026	1.756%		—		30,000		—		30,000
The 150-1st Won-denominated unsecured bond		Apr. 7, 2023	—		—		20,000		—		—
The 150-2nd Won-denominated unsecured bond		Apr. 8, 2024	1.462%		—		30,000		—		30,000
The 151-1st Won-denominated unsecured bond		May 12, 2023	—		—		10,000		—		—
The 151-2nd Won-denominated unsecured bond		May 14, 2024	1.432%		—		40,000		—		40,000
The 152-1st Won-denominated unsecured bond		Aug. 30, 2024	1.813%		—		80,000		—		80,000
The 152-2nd Won-denominated unsecured bond		Aug. 28, 2026	1.982%		—		20,000		—		20,000
The 153-1st Won denominated unsecured bond		Nov. 10, 2023	—		—		30,000		—		—
The 153-2nd Won-denominated unsecured bond		Nov. 11, 2024	2.425%		—		70,000		—		70,000
The 154th Won-denominated unsecured bond		Jan. 23, 2025	2.511%		—		40,000		—		40,000
The 155-1st Won-denominated unsecured bond		Feb. 29, 2024	2.615%		—		50,000		—		50,000
The 155-2nd Won-denominated unsecured bond		Sep. 2, 2024	2.745%		—		20,000		—		20,000
The 155-3rd Won-denominated unsecured bond		Feb. 28, 2025	2.880%		—		20,000		—		20,000
The 156-1st Won-denominated unsecured bond3		Mar. 25, 2025	5Y CMS+0.404%		—		60,000		—		60,000

(in millions of Korean won and foreign currencies in thousands)				December 31, 2022					December 31, 2023
Type	Maturity		Annual interest rates	Foreign currency		Korean won			Foreign currency		Korean won
The 156-2nd Won-denominated unsecured bond3		Mar. 25, 2032	10Y CMS+0.965%		—		40,000			—		40,000
The 157-1st Won-denominated unsecured bond		Apr. 28, 2023	—		—		30,000			—		—
The 157-2nd Won-denominated unsecured bond		Oct. 27, 2023	—		—		30,000			—		—
The 158th Won-denominated unsecured bond		Jan. 27, 2025	4.421%		—		50,000			—		50,000
The 159-1st Won-denominated unsecured bond		Aug. 09, 2024	4.267%		—		30,000			—		30,000
The 159-2nd Won-denominated unsecured bond		Aug. 11, 2027	4.505%		—		30,000			—		30,000
The 160-1st Won-denominated unsecured bond		Jun. 14, 2024	5.615%		—		20,000			—		20,000
The 160-2nd Won-denominated unsecured bond		Dec. 13, 2024	5.667%		—		20,000			—		20,000
The 160-3rd Won-denominated unsecured bond		Dec. 12, 2025	5.769%		—		30,000			—		30,000
The 161-1st Won-denominated unsecured bond		Jun. 21, 2024	5.527%		—		10,000			—		10,000
The 161-2nd Won-denominated unsecured bond		Dec. 20, 2024	5.557%		—		20,000			—		20,000
The 161-3rd Won-denominated unsecured bond		Jun. 20, 2025	5.594%		—		30,000			—		30,000
The 161-4th Won-denominated unsecured bond		Dec. 22, 2025	5.615%		—		10,000			—		10,000
The 162-1st Won-denominated unsecured bond		Dec. 27, 2023	—		—		50,000			—		—
The 162-2nd Won-denominated unsecured bond		Jan. 26, 2024	5.069%		—		40,000			—		40,000
The 162-3rd Won-denominated unsecured bond		Apr. 26, 2024	5.080%		—		10,000			—		10,000
The 163-1st Won-denominated unsecured bond		Feb. 20, 2026	4.059%		—		—			—		20,000
The 163-2nd Won-denominated unsecured bond		Feb. 22, 2028	4.311%		—		—			—		80,000
The 164-1st Won-denominated unsecured bond		Apr. 12, 2024	3.778%		—		—			—		10,000
The 164-2nd Won-denominated unsecured bond		Oct. 24, 2024	3.821%		—		—			—		30,000
The 164-3rd Won-denominated unsecured bond		Apr. 14, 2028	4.220%		—		—			—		30,000
The 165-1st Won-denominated unsecured bond		May. 09, 2025	3.870%		—		—			—		30,000
The 165-2nd Won-denominated unsecured bond		Nov. 09, 2026	3.932%		—		—			—		10,000
The 165-3rd Won-denominated unsecured bond		May. 07, 2027	3.972%		—		—			—		30,000
The 166-1st Won-denominated unsecured bond		Nov. 22. 2024	4.205%		—		—			—		20,000
The 166-2nd Won-denominated unsecured bond		Apr. 22. 2025	4.310%		—		—			—		40,000
The 166-3rd Won-denominated unsecured bond		May. 21. 2025	4.332%		—		—			—		10,000
The 166-4th Won-denominated unsecured bond		May. 22. 2025	4.332%		—		—			—		40,000
The 167-1st Won-denominated unsecured bond		Dec. 20. 2024	3.865%		—		—			—		30,000
The 167-2nd Won-denominated unsecured bond		Jan. 22. 2025	3.864%		—		—			—		50,000
The 167-3rd Won-denominated unsecured bond		Feb. 21. 2025	3.864%		—		—			—		10,000
The 167-4th Won-denominated unsecured bond		Dec. 22. 2025	3.858%		—		—			—		10,000
Subtotal							8,406,351					8,446,921
Less: Current portion							(1,154,101	)				(1,924,523	)
Discount on bonds							(23,728	)				(19,248	)
Total						￦	7,228,522				￦	6,503,150

1 As of December 31, 2023, the Controlling Company has outstanding notes in the amount of USD 100 million with fixed interest rates under Medium Term Note Program (“MTNP”) registered in the Singapore Stock Exchange, which allowed issuance of notes of up to USD 2,000 million. However, the MTNP has been terminated since 2007.

2 The Daily SOFR is approximately 5.380% as of December 31, 2023. Due to the recent suspension of LIBOR calculation, the Group changed the alternative indicator interest rate to Compounded SOFR+1.210 %.

3 The CMS (5Y) and CMS (10Y) is approximately 2.993% and 2.990%, respectively as of December 31, 2023.

Summary of Korean Won and Foreign Currency Borrowings

2) Convertible bonds

(in millions of Korean won)
Type	Issuance Date		Maturity		Annual interest Rate		December 31, 2022			December 31, 2023
The 1st CB (Private)1		Jun. 5, 2020		Jun. 5, 2025		2	￦	8,000		￦	8,000
The 1st unsecured CB3		Jul. 25, 2022		Jan. 25, 2025		—		30,000			—
Redemption premium								4,565			2,267
Bond discount issuance								(7,206	)		(1,811	)
Subtotal								35,359			8,456
Current portion								—			(8,456	)
Total							￦	35,359		￦	—

1 Common shares of Storywiz are subject to conversion (appraisal period: June 5, 2021~May 4, 2025).

2 Nominal interest rate and maturity yield is approximately 0% and 5%, respectively, and will be settled on maturity.

3 During the current period, bonds of kt cloud are converted to 73,800 of Common shares and 73,800 of preference shares.

Summary of Short-term Borrowings

a. Short-term borrowings

(in millions of Korean won)			December 31, 2022				December 31, 2023
Type	Financial institution	Annual interest rates	Foreign currency		Korean won		Foreign currency		Korean won
Operational	Shinhan Bank	3.840%~6.430%		—	￦	105,000		—	￦	151,500
		—		—		30,000		—		—
	Woori Bank1,	—		—		50,000		—		—
		4.400%				—				70,000
		CD(91D)+1.960%		—		—		—		20,000
	Korea Development Bank	3.230%~4.950%		—		27,201		—		34,900
	Industrial Bank of Korea	4.862%		—		6,000		—		6,000
	Hana Bank1	CD(91D)+0.126%		—		5,000		—		4,800
	KB SECURITIES	4.110%~4.910%		—		94,822		—		69,635
	NH INVESTMENT & SECURITIES	—		—		20,000		—		—
	HSBC2	Compounded SOFR +2.100%		USD 18,500		23,451		USD 23,600		30,450
	NongHyup Bank	4.880%		—		9,000		—		8,500
		—		—		15,000		—		—
	IBK Securities	—		—		20,000		—		—
	Hi Investment & Securities	—		—		99,524		—		—
	Korea Investment	4.910%		—		—				30,000
				Total			￦	504,998	￦	425,785

1 CD (91D) is approximately 3.820% as of December 31, 2023.

2 The Daily SOFR is approximately 5.380% as of December 31, 2023.

Summary of Long-term Borrowings

b. Long-term borrowings

(in millions of Korean won and thousands of foreign currencies)			December 31, 2022					December 31, 2023
Financial institution	Type	Annual interest rates	Foreign currency		Korean won			Foreign currency		Korean won
Export-Import Bank of Korea	Inter-Korean Cooperation Fund1	1.00%		—	￦	1,974			—	￦	1,480
CA-CIB	General loans	3.380%~4.150%		—		200,000			—		200,000
JPM	General loans	2.700%~4.480%		—		100,000			—		200,000
DBS	General loans	4.079%		—		100,000			—		100,000
Shinhan Bank	General loans2	Term SOFR(3M)+1.100%		USD 8,910		11,292			USD 8,910		11,489
	General loans	—		USD 38,000		48,158			—		—
	General loans	1.900%~3.200%		USD 31,472		39,855			USD 31,472		40,655
	General loans3	4.490%		—		62,398			—		62,398
	General loans2	Term SOFR(3M)+1.300%		USD 21,127		26,774			USD 21,127		27,241
	General loans2	Term SOFR(3M)+1.940%		—		—			USD 35,000		45,129
	General loans2	CD(91D)+1.800%		—		—			—		16,900
	General loans2	EURIBOR(3M)+0.900%		EUR 7,700		10,404			EUR 7,700		10,985
Woori Bank	General loans	3.320%~5.800%		—		15,000			—		41,526
	PF loans	—		—		40,682			—		—
Hi Investment & Securities	CP	2.302%		—		90,724			—		92,994
Bookook Investment	CP	3.490%~3.603%		—		18,806			—		19,525
Korea Investment	CP	3.622%		—		73,039			—		75,928
Korea Development Bank	General loans	3.000%~4.870%		—		38,000			—		137,000
NH Jayang	PF loans2	CD(91D)+1.150%		—		59,066			—		53,033
Kyobo Life Insurance	PF loans2	CD(91D)+1.150%~CD(91D) +3.450%		—		66,390			—		84,586
Standard Chartered Bank Korea	PF loans2	CD(91D)+1.150%~CD(91D) +3.450%		—		44,260			—		56,390
General loans2		CD(91D)+0.750%		—		—			—		32,000
Samsung Life Insurance	PF loans	1.860%~4.160%		—		36,883			—		46,992
Subtotal						1,083,705					1,356,251
Less: Current portion						(167,943	)				(699,800	)
					￦	915,762				￦	656,451

1 The above Inter-Korean Cooperation Fund is repayable in installments over 13 years after a seven-year grace period.

2 EURIBOR (3M), Term SOFR (3M) and CD (91D) are approximately 3.909%, 5.331%, 3.820% respectively, as of December 31, 2023.

3 The general loans are repayable in installments over 4 years after a three-year grace period.

Summary of Repayment of Borrowings Including the Current Liabilities

(2) Repayment schedule of the Group’s debentures and borrowings including the portion of current liabilities as of December 31, 2023, is as follows:

(in millions of Korean won)
	Bonds						Borrowings						Total
	In local currency		In foreign currency		Sub- total		In local currency		In foreign currency		Sub- total
Jan. 1, 2024 ~ Dec. 31, 2024	￦	1,478,000	￦	454,941	￦	1,932,941	￦	1,016,254	￦	109,331	￦	1,125,585	￦	3,058,526
Jan. 1, 2025 ~ Dec. 31, 2025		1,445,000		1,160,460		2,605,460		421,322		56,618		477,940		3,083,400
Jan. 1, 2026 ~ Dec. 31, 2026		760,000		515,760		1,275,760		109,087		—		109,087		1,384,847
Jan. 1, 2027 ~ Dec. 31, 2027		280,000		386,820		666,820		15,600		—		15,600		682,420
After Jan. 1, 2028		1,845,000		128,940		1,973,940		53,825		—		53,825		2,027,765
Total	￦	5,808,000	￦	2,646,921	￦	8,454,921	￦	1,616,088	￦	165,949	￦	1,782,037	￦	10,236,958

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Provisions (Tables)

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Summary of Changes in Provisions

Changes in provisions for the years ended December 31, 2022 and 2023, are as follows:

	2022
(in millions of Korean won)	Litigation			Restoration cost			Others			Total
Beginning balance	￦	80,165		￦	107,358		￦	69,874		￦	257,397
Increase (Transfer)		6,005			13,027			5,847			24,879
Usage		(6,155	)		(8,143	)		(15,783	)		(30,081	)
Reversal		(43,686	)		(3,685	)		(4,418	)		(51,789	)
Others		—			405			(445	)		(40	)
Ending balance	￦	36,329		￦	108,962		￦	55,075		￦	200,366
Current		34,730			19,918			54,485			109,133
Non-current	￦	1,599		￦	89,044		￦	590		￦	91,233
	2023
(in millions of Korean won)	Litigation			Restoration cost			Others			Total
Beginning balance	￦	36,329		￦	108,962		￦	55,075		￦	200,366
Increase (Transfer)		592			26,381			10,656			37,629
Usage		(7,179	)		(1,138	)		(6,391	)		(14,708	)
Reversal		(35	)		(653	)		(2,096	)		(2,784	)
Scope change		—			—			(177	)		(177	)
Others		—			(393	)		2,290			1,897
Ending balance	￦	29,707		￦	133,159		￦	59,357		￦	222,223
Current	￦	29,130		￦	26,945		￦	59,134		￦	115,209
Non-current		577			106,214			223			107,014

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Net Defined Benefit Liabilities (Assets) (Tables)

12 Months Ended

Dec. 31, 2023

Statement [LineItems]

Summary of Amount Recognized in the Statements of Financial Position and Defined Benefit Obligations

(1) The amounts recognized in the statements of financial position as of December 31, 2022 and 2023, are determined as follows:

(in millions of Korean won)	December 31, 2022			December 31, 2023
Present value of defined benefit obligations	￦	2,218,655		￦	2,365,793
Fair value of plan assets		(2,478,143	)		(2,462,925	)
Liabilities	￦	51,654		￦	63,616
Assets	￦	311,142		￦	160,748

Summary of Changes in the Defined Benefit Obligations

(2) Changes in the defined benefit obligations for the years ended December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	2022			2023
Beginning	￦	2,494,930		￦	2,218,655
Current service cost		238,068			213,489
Interest expense		59,041			103,874
Benefit paid		(316,047	)		(358,298	)
Changes due to settlements of plan & Past Service Cost		(701	)		1
Remeasurements:
Actuarial gains (losses) arising from changes in demographic assumptions		(13,048	)		1,903
Actuarial gains (losses) arising from changes in financial assumptions		(323,501	)		138,462
Actuarial gains arising from experience adjustments		80,845			48,174
Acquisition and disposition of businesses, etc.		(932	)		(467	)
Ending	￦	2,218,655		￦	2,365,793

(3) Changes in the fair value of plan assets for the years ended December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	2022			2023
Beginning	￦	2,314,632		￦	2,478,143
Interest income		55,902			121,336
Remeasurements:
Return on plan assets (excluding amounts included in interest income)		(8,542	)		9,410
Benefits paid		(287,419	)		(307,762	)
Employer contributions		401,358			165,128
Acquisition and disposition of businesses, etc.		2,212			(3,330	)
Ending	￦	2,478,143		￦	2,462,925

Summary of Amounts Recognized in the Consolidated Statements of Operations

(4) Amounts recognized in the consolidated statements of profit or loss for the years ended December 31, 2021, 2022 and 2023, are as follows:

(in millions of Korean won)	2021			2022			2023
Current service cost	￦	249,125		￦	238,068		￦	213,922
Net Interest cost		5,047			3,139			(17,462	)
Changes due to settlements of plan & Past Service Cost		(681	)		(701	)		1
Transfer out		(16,660	)		(15,102	)		(13,435	)
Total expenses	￦	236,831		￦	225,404		￦	183,026

Summary of Principal Actuarial Assumptions

(5) Principal actuarial assumptions used are as follows:

	December 31, 2021		December 31, 2022		December 31, 2023
Discount rate		2.1%~3.70%		2.4%~6.29%		3.67%~5.51%
Salary growth rate		1%~6.97%		1.82%~8.9%		1.7%~8.96%

Summary of Sensitivity of the Defined Benefit Obligations

(6) The sensitivity of the defined benefit obligations as of December 31, 2023, to changes in the principal assumptions is:

(In percentage, in millions of Korean won )	Effect on defined benefit obligation
	Changes in assumption	Increase in assumption		Decrease in assumption
Discount rate	0.5% point		￦(139,461)	￦	150,568
Salary growth rate	0.5% point		145,687		(135,431	)

Summary of Expected Maturity Analysis of Undiscounted Pension Benefits

The expected maturity analysis of undiscounted pension benefits as of December 31, 2023, is as follows:

(in millions of Korean won)	Less than 1 year		Between 1- 2 years		Between 2- 5 years		Over 5 years		Total
Pension benefits	￦	257,315	￦	376,352	￦	910,076	￦	2,013,167	￦	3,556,910

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Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Summary Of Major Commitments With Local Financial Institutions

(1) As of December 31, 2023, major commitments with local financial institutions are as follows:

(in millions of Korean won and foreign currencies in thousands)	Financial institution	Limit		Used amount
Bank overdraft	Kookmin Bank and others		374,000		—
Inter-Korean Cooperation Fund	Export-Import Bank of Korea		37,700		1,480
Economic Cooperation Business Insurance	Export-Import Bank of Korea		3,240		1,732
Collateralized loan on electronic accounts receivable-trade	Kookmin Bank and others		545,350		42,822
Plus electronic notes payable	Industrial Bank of Korea		50,000		885
Working capital loan	Korea Development Bank and others		1,562,800		142,700
	Shinhan Bank		USD 76,509		USD 76,509
	Woori Bank		EUR 7,700		EUR 7,700
Facility loans	Shinhan Bank and others		924,000		429,924
Derivatives transaction limit	Korea Development Bank and others		USD 1,970,000		USD 1,970,000
Citi Bank			JPY 400,000		JPY 400,000
Total	KRW		3,497,090		619,543
	USD		2,046,509		2,046,509
	EUR		7,700		7,700
	JPY		400,000		400,000

Summary of Guarantees Received from Financial Institutions

(2) As of December 31, 2023, guarantees received from financial institutions are as follows:

(in millions of Korean won and foreign currencies in thousands)	Financial institution	Limit
Hana Bank	Guarantee for payment in Korean currency		4,000
	Comprehensive credit line and others		3,100
	Guarantee for payment in foreign currency		USD 59
	Comprehensive credit line and others		USD 10,300
Kookmin Bank	Guarantee for payment in foreign currency		USD 3,186
Shinhan Bank	Guarantee for payment in Korean currency and others		USD 94,517
	Guarantee for payment in foreign currency and others		VND 211,262
Woori Bank	Guarantee for payment in Korean currency		5,200
	Guarantee for payment in foreign currency		USD 7,000
Korea Development Bank	Refund guarantee for advances received		USD 6,811
HSBC	Guarantees for depositions		USD 816
Seoul Guarantee Insurance Company	Performance guarantee and others		366,395
Korea Software Financial Cooperative	Performance guarantee and others		1,556,979
Korea Specialty Contractor Financial Cooperative	Performance guarantee and others		135
Korea Housing Finance Corporation	Performance guarantee and others		44,000

(in millions of Korean won and foreign currencies in thousands)	Financial institution	Limit
Korea Housing & Urban Guarantee Corporation1	Performance guarantee and others		691,530
Information & Communication Financial Cooperative	Performance guarantee and others		78,183
Total	KRW		2,749,522
	USD		122,689
	VND		211,262

1 Inventory assets(￦278,031 million) and investment properties(￦283,688 million) are provided as collateral with commitment respectively, as of December 31, 2023.

Summary Of Guarantees Provided By The Group For Third Party

(3) As of December 31, 2023, guarantees provided by the Group to a third party, are as follows:

(in millions of Korean won)	Subject to payment guarantees	Creditor	Limit		Used amount		Period
KT Estate Inc	Wonju Bando U-bora Mark Bridge Buyer	Hana Bank		103,000		55,314		Aug. 5, 2022 ~ Feb. 28, 2025
KT Engineering Co., Ltd.1	Gasan Solar Power Plant Inc.	Shinhan Bank		4,700		364		Jan. 7, 2010 ~ Jan. 8, 2025
KT Engineering Co., Ltd.1	Korea Cell Inc.	Suhyup Bank		3,250		50		Feb. 17, 2014 ~ Feb. 16, 2024
KT Engineering Co., Ltd.1	San-Ya Agricultural Association Corporation	Suhyup Bank		3,250		51		Feb. 17, 2014 ~ Feb. 16, 2024
KT Alpha Co., Ltd.	Cash payers	T-commerce cash payers		821		—		Apr. 14, 2023 ~ Apr. 12, 2024
Nasmedia Co., Ltd.	Stockholders Association Members	Korea Securities Finance Corp		1,104		610		—

1 KT Engineering Co., Ltd., a subsidiary of the Group, is subject to payment, depending on the reimbursement of principal debtor.

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Leases (Tables)

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Summary of balance sheet information about leases for lessee

The consolidated statement of financial position shows the following amounts relating to leases:

(in millions of Korean won)	December 31, 2022		December 31, 2023
Right-of-use assets
Property and building	￦	1,081,067	￦	1,019,537
Machinery and communication line facilities		50,794		89,150
Others		148,473		196,276
Total	￦	1,280,334	￦	1,304,963
(in millions of Korean won)	December 31, 2022		December 31, 2023
Lease liabilities1
Current	￦	315,892	￦	307,868
Non-Current		856,146		872,042
Total	￦	1,172,038	￦	1,179,910

1 Included in the line items ‘Other current liabilities and other non-current liabilities’ in the consolidated statements of financial position (Notes 9).

Summary of statement of profit or loss information about leases for lessee

The consolidated statement of profit or loss relating to leases for the year ended December 31, 2021,2022 and 2023 are as follows:

(in millions of Korean won)	December 31, 2021		December 31, 2022		December 31, 2023
Depreciation of Right-of-use assets
Property and building	￦	303,984	￦	305,120	￦	297,571
Machinery and communication line facilities		41,794		31,140		32,794
Others		52,938		59,954		72,372
Total	￦	398,716	￦	396,214	￦	402,737
Depreciation of Investment Properties	￦	1,794	￦	15	￦	—
Interest expense relating to lease liabilities		36,651		41,469		52,035
Expense relating to short-term leases		7,984		12,876		8,804
Expense relating to leases of low-value assets that are not short-term leases		26,033		26,813		26,290
Expense relating to variable lease payments not included in lease liabilities		8,400		4,827		9,288

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Share Capital (Tables)

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Summary of Share Capital

As of December 31, 2022 and 2023, the Group has 1,000,000,000 shares authorized to issue and details are as follows:

December 31, 2022

December 31, 2023

Number of issued shares

Par value per share (Korean won)

Ordinary Shares (in millions of Korean won)

Number of issued shares

Par value per share (Korean won)

Ordinary Shares (in millions of Korean won)

Ordinary shares1

261,111,808

￦5,000

￦1,564,499

257,860,760

￦5,000

￦1,564,499

1 The Group retired 55,039,007 treasury shares against retained earnings. Based on the local regulations in Korea, upon retirement of shares, the Company has decreased the number of shares issued but has not decreased the ordinary shares capital.

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Retained Earnings (Tables)

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Summary of Retained Earnings

Details of retained earnings as at December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	December 31, 2022		December 31, 2023
Legal reserve1	￦	782,249	￦	782,249
Voluntary reserves2		4,651,362		4,651,362
Unappropriated retained earnings		8,821,705		9,042,256
Total	￦	14,255,316	￦	14,475,867

1 The Commercial Code of the Republic of Korea requires the Controlling Company to appropriate, as a legal reserve, an amount equal to a minimum of 10% of cash dividends paid until such reserve equals 50% of its issued share capital. The reserve is not available for the payment of cash dividends but may be transferred to share capital with the approval of the Controlling Company’s Board of Directors or used to reduce accumulated deficit, if any, with the ratification of the Controlling Company’s majority shareholders.

2 The reserves of research and development of human resources in other surplus reserves are separately accumulated on disposal of retained earnings on tax filing adjustments when calculating income taxes in accordance with regulations of Tax Reduction and Exemption Control Act of Korea. Reversal of the reserves according to the relevant tax law can be paid out as dividends

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Accumulated Other Comprehensive Income and Other Components of Equity (Tables)

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Summary of Accumulated Other Comprehensive Income

(1) As of December 31, 2022 and 2023, the details of the Controlling Company’s accumulated other comprehensive income are as follows:

(in millions of Korean won)	December 31, 2022			December 31, 2023
Changes in investments in associates and joint ventures	￦	(11,752	)	￦	4,023
Gain (loss) on derivatives valuation		(7,109	)		(29,361	)
Gain (loss) on valuation of financial assets at fair value through other comprehensive income		(52,100	)		73,928
Exchange differences on translation for foreign operations		(6,815	)		3,817
Total	￦	(77,776	)	￦	52,407

Summary of Changes in Accumulated Other Comprehensive Income

(2) Changes in accumulated other comprehensive income for the years ended December 31, 2022 and 2023, are as follows:

	2022
( in millions of Korean won)	Beginning			Increase/ decrease			Reclassification to gain or loss			Ending
Changes in investments in associates and joint ventures	￦	(3,461	)	￦	(8,291	)	￦	—		￦	(11,752	)
Gain (loss) on derivatives valuation		25,031			63,281			(95,421	)		(7,109	)
Gain on valuation of financial assets at fair value through other comprehensive income		108,685			(160,785	)		—			(52,100	)
Exchange differences on translation for foreign operations		(12,786	)		5,971			—			(6,815	)
Total	￦	117,469		￦	(99,824	)	￦	(95,421	)	￦	(77,776	)

	2023
(in millions of Korean won)	Beginning			Increase (decrease)		Reclassification to gain or loss			Ending
Changes in investments in associates and joint ventures	￦	(11,752	)	￦	15,775	￦	—		￦	4,023
Gain (loss) on derivatives valuation		(7,109	)		15,690		(37,942	)		(29,361	)
Gain (loss) on valuation of financial assets at fair value through other comprehensive income		(52,100	)		126,028		—			73,928
Exchange differences on translation for foreign operations		(6,815	)		10,632		—			3,817
Total	￦	(77,776	)	￦	168,125	￦	(37,942	)	￦	52,407

Summary of Other Components of Equity

(3) The Group’s other components of equity as at December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	December 31, 2022			December 31, 2023
Treasury stock	￦	(202,295	)	￦	(398,075	)
Gain or loss on disposal of treasury stock 1		(41,503	)		3,220
Share-based payments		6,222			8,773
Equity transactions within consolidated entities 2		(334,576	)		(416,336	)
Total	￦	(572,152	)	￦	(802,418	)

1 The amount directly reflected in equity is ￦101 million for the year ended December 31, 2023 (2022: ￦14,886 million).

2 Profit or loss incurred from transactions with non-controlling interest and investment difference incurred from changes in ownership of subsidiaries are included.

Summary of Treasury Stock

(4) As of December 31, 2022 and 2023, the details of treasury stock are as follows:

	December 31, 2022		December 31, 2023
Number of shares (in shares)		5,069,130		11,447,338
Amounts (in millions of Korean won)	￦	202,295	￦	398,075

Treasury stocks held as of December 31, 2023, are expected to be used for stock compensation for the Group’s directors, employees, and other purposes.

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Share-based Payments (Tables)

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Summary of Details of Share-Based Payments

(1) Details of share-based payments granted by the Controlling to executives and employees, including the CEO, by the resolution of the Board of Directors for the years ended December 31, 2022 and 2023, are as follows:

	2022
(in share)	16th grant
Grant date	June 9, 2022
Grantee	CEO, internal directors, external directors, executives
Vesting conditions	Service condition: 1 year Non-market performance condition: achievement of performance
Fair value per option (in Korean won)	￦36,941
Total compensation costs (in Korean won)	￦9,442 million
Exercise date	July 17, 2023
Valuation method	Fair value method

	2023
(in share)	17th grant
Grant date	June 15, 2023, Oct 17, 2023
Grantee	CEO, internal directors, external directors, executives
Vesting conditions	Service condition: 1 year Non-market performance condition: achievement of performance
Fair value per option (in Korean won)	￦30,205
Total compensation costs (in Korean won)	￦7,262 million
Estimated exercise date (exercise date)	During 2024
Valuation method	Fair value method

Summary of Changes in the Number of Stock Options and the Weighted-Average Exercise Price

(2) Changes in the number of stock options and the weighted-average exercise price as at December 31, 2022 and 2023, are as follows:

(In share)	2022
	Beginning		Grant		Expired			Exercised1			Ending		Number of shares exercisable
15th grant		284,209		—		(155,286	)		(128,923	)		—		—
16th grant		—		258,509		—			—			258,509		—
Total		284,209		258,509		(155,286	)		(128,923	)		258,509		—
(In share)	2023
	Beginning		Grant		Expired			Exercised1			Ending		Number of shares exercisable
16th grant		258,509		—		(105,859	)		(131,690	)		20,960		—
17th grant		—		307,182		—			—			307,182		—
Total		258,509		307,182		(105,859	)		(131,690	)		328,142		—

1 The weighted average price of ordinary shares at the time of exercise, during the year ended December 31, 2023 is ￦29,550 (2022: ￦35,450).

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Revenue from Contracts with Customers, Other Income and Relevant Contract Assets and Liabilities (Tables)

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Detail Explanation of Revenue And Other Income in the consolidated Statement of operations

(1) The Group has recognized the following amounts relating to revenue and other income in the statement of profit or loss:

(in millions of Korean won)	2021		2022		2023
Revenue from contracts with customers	￦	24,712,128	￦	25,432,727	￦	26,063,185
Revenue from other sources		185,877		206,128		224,016
Other income (Note 26)		307,654		595,351		308,044
Total revenue and other income	￦	25,205,659	￦	26,234,206	￦	26,595,245

Detail Explanation of Operating Revenues And Other Income

(2) Operating revenues and other income for the years ended December 31, 2021, 2022 and 2023 are as follows:

(in millions of Korean won)	2021		2022		2023
Mobile services	￦	6,936,485	￦	7,013,889	￦	7,140,333
Fixed-line services		4,960,338		5,056,513		5,142,359
Fixed-line and VoIP telephone services		1,465,059		1,378,265		1,249,024
Broadband Internet access services		2,343,591		2,504,833		2,578,558
Data communication services		1,151,689		1,173,415		1,314,777
Media and content		2,800,630		3,099,776		3,206,521
Financial services		3,661,896		3,836,589		3,967,763
Sale of goods		3,532,973		3,393,646		3,292,514
Others		3,313,337		3,833,793		3,845,755
Total	￦	25,205,659	￦	26,234,206	￦	26,595,245

Detail Analysis of Contract with Customer Assets and Liabilities

(3) Contract assets and liabilities recognized in relation to the revenues from contracts with customers, are as follows:

(in millions of Korean won)	December 31, 2022		December 31, 2023
Contract assets1	￦	963,133	￦	1,130,745
Contract liabilities1		344,869		311,023
Deferred revenue2	￦	81,653	￦	81,067

1 The Group recognized contract assets of ￦308,821million and contract liabilities of ￦32,274 million for long-term construction contract as of December 31, 2023 (2022: contract assets of ￦160,880 million and contract liabilities of ￦60,762 million). The Group recognizes contract assets as trade receivables and other receivables, and contract liabilities as other current liabilities.

2 Deferred revenue recognized relating to government grant is excluded.

Detail Analysis of Contract Costs Recognized as Assets

(4) The contract costs recognized as assets are as follows:

(in millions of Korean won)	2021		2022		2023
Incremental cost of contract establishment	￦	1,726,401	￦	1,744,096	￦	1,656,711
Cost of Contract performance		74,843		73,582		70,757

Detail of Revenue Arising from Carried-Forward Contract Liabilities

(5) The recognized revenue arising from carried-forward contract liabilities from prior year is as follows:

(in millions of Korean won)	2021		2022		2023
Revenue recognized that was included in the contract liabilities balance at the beginning of the year
Allocation of the transaction price	￦	275,965	￦	246,843	￦	213,609
Deferred revenue of joining/installment fee		42,100		44,204		41,824
Total	￦	318,065	￦	291,047	￦	255,433

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Other Income (Tables)

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Summary Of Other Income

Other income for the years ended December 31, 2021, 2022 and 2023, are as follows:

(in millions of Korean won)	2021		2022		2023
Gains on disposal of property and equipment and investment properties	￦	54,007	￦	52,603	￦	22,447
Gains on disposal of intangible assets		1,726		622		1,727
Gain on disposal of right-of-use assets		3,138		3,326		3,580
Property and Equipment loss recovery income		148,927		159,849		152,712
Income from government subsidies		43,822		44,473		40,725
Gain on disposal of investments in associates		5		38,319		6,982
Gain on disposal of investments in subsidiaries		244		216,591		28,825
Others1		55,785		79,568		51,046
Total	￦	307,654	￦	595,351	￦	308,044

1 Certain amounts that were previously reported in the table above have been grouped as Others.

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Operating Expenses (Tables)

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Summary of Operating Expenses

(1) Operating expenses for the years ended December 31, 2021, 2022 and 2023, are as follows:

(in millions of Korean won)	2021		2022			2023
Employee benefit cost	￦	4,215,810	￦	4,495,885		￦	4,556,832
Depreciation		2,605,594		2,637,463			2,723,610
Depreciation of right-of-use assets		398,716		396,214			402,737
Amortization of intangible assets		603,327		622,202			683,784
Commissions		1,125,944		1,295,434			1,264,729
Interconnection charges		507,567		479,500			436,598
International interconnection fee		192,008		186,253			140,433
Purchase of inventories		3,753,792		3,656,040			3,595,345
Changes of inventories		20,491		(195,046	)		(203,071	)
Sales commission		2,343,375		2,353,909			2,353,318
Service cost1		2,296,324		2,334,386			2,229,709
Utilities		364,373		368,348			544,675
Taxes and dues		268,651		276,962			250,651
Rent		123,246		160,848			167,576
Insurance premium		66,717		68,245			66,737
Installation fee		154,542		150,140			174,238
Advertising expenses		171,400		195,519			153,750
Allowance for bad debts		82,329		115,358			150,549
Card service cost		3,114,047		3,127,673			3,189,376
Loss on disposal of property and equipment		71,417		81,415			72,710
Loss on disposal of intangible assets		3,885		7,015			5,328
Loss on disposal of right-of-use assets		11,457		2,348			2,115
Loss on disposal of investments in subsidiaries		13,727		—			—
Impairment loss on property and equipment		2,115		16,094			7,871
Impairment loss on intangible assets		3,747		30,965			236,206
Donations		10,981		15,642			24,664
Other allowance for bad debts		28,066		17,551			34,112
Others		952,614		1,369,686			1,902,214
Total	￦	23,506,262	￦	24,266,049		￦	25,166,796

Summary of Details of Salaries and Wages

(2) Details of employee benefit cost for the years ended December 31, 2021, 2022 and 2023, are as follows:

(in millions of Korean won)	2021		2022		2023
Salaries & Wages	￦	3,837,359	￦	4,161,874	￦	4,231,781
Post-employment benefits(Defined benefit plan)		236,831		225,404		183,026
Post-employment benefits(Defined contribution plan)		71,068		72,576		85,174
Share-based payment		47,415		16,799		15,450
Others		23,137		19,232		41,401
Total	￦	4,215,810	￦	4,495,885	￦	4,556,832

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Financial Income and Costs (Tables)

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Summary of Details of Financial Income

(1) Details of financial income for the years ended December 31, 2021, 2022 and 2023, are as follows:

(in millions of Korean won)	2021		2022		2023
Interest income	￦	273,460	￦	271,925	￦	279,607
Gain on foreign currency transactions		19,976		67,976		27,407
Gain on foreign currency translation		32,768		43,092		11,944
Gain on derivative transactions		2,215		50,668		12,304
Gain on valuation of derivatives		255,149		182,998		49,881
Gain on disposal of trade receivables		—		—		3,441
Gain on valuation of financial instruments		90,653		31,032		32,477
Others		52,062		42,737		69,216
Total	￦	726,283	￦	690,428	￦	486,277

Summary of Details of Financial Costs

(2) Details of financial costs for the years ended December 31, 2021, 2022 and 2023, are as follows:

(in millions of Korean won)	2021		2022		2023
Interest expenses	￦	263,389	￦	293,854	￦	356,345
Loss on foreign currency transactions		13,105		81,171		34,281
Loss on foreign currency translation		213,689		200,109		95,730
Loss on derivative transactions		6,287		24,331		417
Loss on valuation of derivatives		15,947		21,601		6,598
Loss on disposal of trade receivables		22,712		62,697		17,980
Loss on valuation of financial instruments		25,994		65,660		55,049
Others		2,207		485		2,282
Total	￦	563,330	￦	749,908	￦	568,682

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Deferred Income Tax and income Tax Expense (Tables)

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Summary of Analysis of Deferred Tax Assets and Deferred Tax Liabilities

(1) The analysis of deferred tax assets and deferred tax liabilities as at December 31, 2022 and 2023, is as follows:

(in millions of Korean won)	December 31, 2022			December 31, 2023
Deferred tax assets
Deferred tax assets to be recovered within 12 months	￦	398,710		￦	404,234
Deferred tax assets to be recovered after more than 12 months		1,907,690			1,824,099
Deferred tax assets before offsetting		2,306,400			2,228,333
Deferred tax liabilities
Deferred tax liabilities to be recovered within 12 months		(586,522	)		(491,817	)
Deferred tax liabilities to be recovered after more than 12 months		(2,108,438	)		(2,116,346	)
Deferred tax liabilities before offsetting		(2,694,960	)		(2,608,163	)
Deferred tax assets after offsetting	￦	579,090		￦	614,500
Deferred tax liabilities after offsetting	￦	967,650		￦	994,330

Summary of Movement in Deferred Income Tax Assets and Liabilities

(2) The movement in deferred income tax assets and liabilities during the year, without taking into consideration the offsetting of balances within the same tax jurisdiction, is as follows:

(in millions of Korean won)	2022
	Beginning			Statement of profit or loss			Other comprehensive income			Ending
Deferred tax liabilities
Investments in subsidiaries, associates and joint ventures		(240,633	)		(18,299	)		3,748			(255,184	)
Depreciation and impairment loss		(88,588	)		(62,845	)		—			(151,433	)
Plan assets		(538,928	)		(5,294	)		1,322			(542,900	)
Advanced depreciation provision		(339,005	)		(182,934	)		—			(521,939	)
Contract assets		(493,917	)		69,615			—			(424,302	)
Financial assets at fair value through profit or loss		(336	)		(73	)		(11	)		(420	)
Financial assets at fair value through other comprehensive income		(47,521	)		(71,396	)		58,288			(60,629	)
Others		(623,744	)		(111,135	)		(3,274	)		(738,153	)
Total	￦	(2,372,672	)	￦	(382,361	)	￦	60,073		￦	(2,694,960	)
Deferred tax assets
Depreciation and impairment loss		225,821			(36,989	)		—			188,832
Contract liabilities		148,454			(27,165	)		—			121,289
Defined benefit liabilities		571,336			(22,423	)		(67,055	)		481,858
Provisions		172,871			(20,894	)		(22	)		151,955
Others		899,543			351,317			8,635			1,259,495
Total	￦	2,018,025		￦	243,846		￦	(58,442	)	￦	2,203,429
Temporary difference, net		(354,647	)		(138,515	)		1,631			(491,531	)
Tax credit carryforwards		134,417			(31,446	)		—			102,971
Total net balance	￦	(220,230	)	￦	(169,961	)	￦	1,631		￦	(388,560	)

(in millions of Korean won)	2023
	Beginning			Statement of profit or loss			Other comprehensive income			Ending
Deferred tax liabilities
Investments in subsidiaries, associates and joint ventures		(255,184	)		(7,821	)		(7,225	)		(270,230	)
Depreciation and impairment loss		(151,433	)		39,309			—			(112,124	)
Plan assets		(542,900	)		8,367			826			(533,707	)
Advanced depreciation provision		(521,939	)		3,859			—			(518,080	)
Contract assets		(424,302	)		2,478			—			(421,824	)
Financial assets at fair value through profit or loss		(420	)		461			43			84
Financial assets at fair value through other comprehensive income		(60,629	)		(53	)		(41,945	)		(102,627	)
Others		(738,153	)		90,876			(2,378	)		(649,655	)
Total	￦	(2,694,960	)	￦	137,476		￦	(50,679	)	￦	(2,608,163	)
Deferred tax assets
Depreciation and impairment loss		188,832			(71,689	)		(397	)		116,746
Contract liabilities		121,289			(9,311	)		—			111,978
Defined benefit liabilities		481,858			(6,705	)		40,838			515,991
Provisions		151,955			(5,784	)		—			146,171
Others		1,259,495			(53,459	)		2,141			1,208,177
Total	￦	2,203,429		￦	(146,948	)	￦	42,582		￦	2,099,063
Temporary difference, net		(491,531	)		(9,472	)		(8,097	)		(509,100	)
Tax credit carryforwards		102,971			26,299			—			129,270
Total net balance	￦	(388,560	)	￦	16,827		￦	(8,097	)	￦	(379,830	)

Summary of Tax Impacts Recognized Directly To Equity

(3) The tax impacts recognized directly to equity as of December 31, 2021, 2022, and 2023, are as follows:

	December 31, 2021									December 31, 2022									December 31, 2023
(in millions of Korean won)	Before recognition			Tax effect			After recognition			Before recognition			Tax effect			After recognition			Before recognition			Tax effect			After recognition
Gain (loss) on valuation of financial assets at fair value through other comprehensive income	￦	163,892		￦	(34,112	)	￦	129,780		￦	(216,862	)	￦	58,288		￦	(158,574	)	￦	163,750		￦	(41,945	)	￦	121,805
Gain (loss) on valuation of hedge instruments		6,916			(1,644	)		5,272			(42,510	)		11,180			(31,330	)		(30,168	)		7,555			(22,613	)
Remeasurements of net defined benefit liabilities		74,518			(18,696	)		55,822			247,162			(65,733	)		181,429			(179,129	)		41,664			(137,465	)
Share of gain (loss) of associates and joint ventures, and others		(34,909	)		9,097			(25,812	)		(14,931	)		3,748			(11,183	)		28,715			(7,225	)		21,490
Exchange differences on translation for foreign operations		683			(178	)		505			23,316			(5,852	)		17,464			32,376			(8,146	)		24,230
Gain or loss on disposal of treasury stock		(15,657	)		4,080			(11,577	)		(59,308	)		14,886			(44,422	)		402			(101	)		301
Total	￦	195,443		￦	(41,453	)	￦	153,990		￦	(63,133	)	￦	16,517		￦	(46,616	)	￦	15,946		￦	(8,198)		￦	7,748

Summary of Details of Income Tax Expense

(4) Details of income tax expense for the years ended December 31, 2021, 2022 and 2023, are calculated as follows:

(in millions of Korean won)	2021		2022		2023
Current income tax expense	￦	289,471	￦	335,796	￦	347,265
Impact of change in deferred taxes		229,545		169,961		(16,827	)
Income tax expense	￦	519,016	￦	505,757	￦	330,438

Summary of Tax on the Group's Profit Before Tax

(5) The tax on the Group’s profit before tax differs from the theoretical amount that would arise using the weighted average tax rate applicable to profits of the entities as follows:

(in millions of Korean won)	2021			2022			2023
Profit before income tax expense	￦	1,978,411		￦	1,891,392		￦	1,302,620
Statutory income tax expense	￦	533,701		￦	509,771		￦	333,530
Tax effect
Income not taxable for taxation purposes		(4,307	)		(47,550	)		(30,106	)
Non-deductible expenses		20,570			53,398			26,723
Tax credit		(31,517	)		(54,895	)		(78,459	)
Additional payment of income taxes		(221	)		11,744			(4,991	)
Adjustments in deferred tax from changes in tax rate		—			(41,545	)		564
Tax effect and adjustment on consolidation
Goodwill impairment		—			5,809			106,010
Eliminated dividend income form subsidiaries		7,264			—			—
Changes of out-side tax effect		4,738			29,922			4,436
Intangible Asset impairment and amortization		796			5,276			5,892
Reversal expenses of contract cost assets		(2,932	)		(4,800	)		9,281
Acquisition and disposition of businesses		(5,128	)		—			—
Others		(3,948	)		38,627			(42,442	)
Income tax expense	￦	519,016		￦	505,757		￦	330,438

Summary of deferred tax assets and liabilities that are not recognized

(6) Details of deferred tax assets and liabilities that are not recognized as at December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	2022		2023
Deductible temporary differences
Investment in subsidiaries, associates, and joint ventures	￦	3,384,295	￦	3,520,173
Unused tax loss		103,326		203,200
Unused Tax credit		1,988		2,338
Others		387,084		437,238
Total	￦	3,876,693	￦	4,162,949
Taxable temporary differences
Investment in subsidiaries, associates, and joint ventures	￦	857,076	￦	903,394
Others		216,660		211,201
Total	￦	1,073,736	￦	1,114,595

Summary of expected period of expiry for unused tax losses not recognized in deferred tax assets

(7) The expected period of expiry for unused tax losses not recognized in deferred tax assets as of December 31, 2022 and 2023, is as follows:

(in millions of Korean won)	2022		2023
2023	￦	72,512	￦	4,484
2024		5,011		2,836
2025		3,701		2,086
2026		2,112		4,541
2027		2,534		2,473
2028		396		6,533
2029		617		743
2030		2,198		713
2031		1,360		756
2032		7,450		—
Atter 2033		5,435		178,035
Total	￦	103,326	￦	203,200

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Earnings per Share (Tables)

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Summary of Basic and Diluted Earnings per Share From Operations

(1) Basic Earnings per Share

Basic earnings per share is calculated by dividing the profit from operations attributable to equity holders of the Group by the weighted average number of ordinary shares outstanding during the period, excluding ordinary shares purchased by the Group and held as treasury stock.

Basic earnings per share from operations for the years ended December 31, 2021, 2022 and 2023, is calculated as follows:

	2021		2022		2023
Profit attributable to ordinary shares of owners of the Controlling Company (in millions of Korean won)	￦	1,354,537	￦	1,259,686	￦	993,325
Weighted average number of ordinary shares outstanding (in number of shares)		235,201,782		242,235,332		249,470,072
Basic earnings per share (in Korean won)	￦	5,759	￦	5,200	￦	3,982

Diluted earnings per share from operations is calculated by adjusting the weighted average number of ordinary shares outstanding to assume conversion of all dilutive potential ordinary shares. The Group has dilutive potential ordinary shares from convertible bond and other share-based compensation.

(2) Diluted Earnings per Share

Diluted earnings per share from operations is calculated by adjusting the weighted average number of ordinary shares outstanding assuming that all dilutive potential ordinary shares are converted into ordinary shares. The Group has dilutive potential ordinary shares from convertible bonds, convertible preferred stock and other share-based payments:

	2021		2022			2023
Profit attributable to ordinary shares of owners of the Controlling Company (in millions of Korean won)	￦	1,354,537	￦	1,259,686		￦	993,325
Adjustment to net income attributable to ordinary shares (in millions of Korean won)		—		(496	)		(827	)
Diluted profit attributable to ordinary shares (in millions of Korean won)		1,354,537		1,259,190			992,498
Number of dilutive potential ordinary shares outstanding (in number of shares)		483,760		91,931			119,263
Weighted average number of ordinary shares outstanding (in number of shares)		235,685,542		242,327,263			249,589,335
Diluted earnings per share (in Korean won)	￦	5,747	￦	5,196		￦	3,977

Diluted earnings per share is earnings per outstanding of ordinary shares and dilutive potential ordinary shares. Diluted earnings per share is calculated by dividing adjusted profit for the year by the sum of the number of ordinary shares and dilutive potential ordinary shares. Convertible bonds and convertible preferred stocks without dilutive effects are excluded from the calculation.

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Cash Generated from Operations (Tables)

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Summary of Cash Flows from Operating Activities

(1) Cash flows from operating activities for the years ended December 31, 2021, 2022 and 2023, are as follows:

(in millions of Korean won)	2021			2022			2023
1. Profit for the year	￦	1,459,395		￦	1,385,635		￦	972,182
2. Adjustments to reconcile net income
Income tax expense		519,016			505,757			335,367
Interest income 1		(300,900	)		(340,794	)		(392,580	)
Interest expense 1		268,847			320,914			410,566
Dividends income 2		(21,525	)		(14,121	)		(59,758	)
Depreciation		2,643,894			2,687,191			2,773,152
Amortization of intangible assets		604,744			627,261			691,909
Depreciation of right-of-use assets		398,716			396,214			402,737
Provision for severance benefits (defined benefits)		253,491			240,506			196,027
Impairment losses on trade receivables		105,344			132,102			175,244
Share of net profit or loss of associates and joint ventures		(116,061	)		16,821			44,323
Loss(gain) on disposal of associates and joint ventures		1			(38,024	)		(6,982	)
Loss(gain) on the disposal of subsidiaries		13,483			(216,591	)		(28,825	)
Loss(gain) on disposal of right-of-use assets		8,319			(978	)		(1,465	)
Impairment losses on assets held for sale		11			—			—
Impairment loss on property and equipment and investment in properties		2,115			16,094			7,871
Loss(gain) on disposal of property and equipment and investment in properties 3		17,410			(66,317	)		511
Loss on disposal of intangible assets		2,159			6,393			3,601
Loss on impairment of intangible assets		3,747			30,674			236,106
Loss on foreign currency translation		180,921			157,017			83,899
Gain on valuation and settlement of derivatives, net		(235,130	)		(205,381	)		(37,249	)
Gain on disposal of financial assets at fair value through profit or loss		(29,974	)		(2,347	)		(2,225	)
Loss(Gain) on valuation of financial assets at fair value through profit or loss		(64,660	)		44,833			13,920
Loss(gain) on disposal of financial assets at amortized cost 4		(35	)		3			1
Others		84,625			(49,891	)		158,820
3. Change in operating assets and liabilities, net of effects from purchase of controlled entity and sale of engineering division
Decrease(increase) in trade receivables		327,031			(43,787	)		(124,023	)
Increase in other receivables		(328,610	)		(1,598,216	)		(1,085,527	)
Decrease(increase) in other current assets		(89,230	)		(101,947	)		250,569
Increase in other non-current assets		(143,087	)		(120,054	)		(86,030	)
Decrease(increase) in inventories		32,798			(179,255	)		(317,531	)
Increase(decrease) in trade payables		289,044			(368,355	)		121,515
Increase in other payables		207,583			1,103,113			829,220
Increase(decrease) in other current liabilities		107,993			(30,375	)		414,436
Decrease in other non-current liabilities		(14,915	)		(1,015	)		(14,272	)
Decrease in provisions		(4,668	)		(22,115	)		(5,083	)
Increase(decrease) in deferred revenue		3,696			(384	)		905
Decrease(increase) in plan assets		(114,631	)		(90,771	)		115,725
Payment of post-employment benefits		(241,350	)		(343,931	)		(329,861	)
4. Cash generated from operations (1+2+3)	￦	5,829,607		￦	3,835,879		￦	5,747,195

1 BC Card CO., Ltd. and other subsidiaries of the Group recognize interest income and expense as operating revenue and expense, respectively, including interest income of ￦112,973 million (2021: ￦27,440 million, 2022: ￦68,869 million) and interest expense of ￦55,677 million that are recognized as operating revenue and expense, respectively, for the year ended December 31, 2023 (2021: ￦5,458 million, 2022: ￦27,060 million).

2 BC Card Co., Ltd. Recognized dividend income as operating revenue, including dividend income of ￦1,759 million that is recognized as operating revenue for the year ended December 31, 2023 (2021: ￦1,340 million, 2022: ￦2,299 million).

3 KT Estate Inc. recognized gain and loss on disposal of investment properties as operating revenue and expense, respectively, including gain on disposal of investment properties of ￦49,752 million that is recognized as operating revenue for the year ended December 31, 2023.

4 KT Investment CO., Ltd. and other subsidiaries of the Group recognized gain and loss on valuation of financial assets at fair value through profit or loss as operating revenue and expense, respectively, including loss on valuation of financial assets at fair value through profit or loss of ￦11,112 million that is recognized as operating expense for the year ended December 31, 2023.

Summary of Significant Transactions not Affecting Cash Flows

(2) Significant transactions not affecting cash flows for the years ended December 31, 2021, 2022 and 2023, are as follows:

(in millions of Korean won)	2021			2022			2023
Reclassification of the current portion of borrowings	￦	1,303,543		￦	1,004,818		￦	1,731,998
Reclassification of construction-in-progress to property and equipment		2,916,888			3,167,965			3,123,611
Reclassification of accounts payable from property and equipment		(149,512	)		(7,055	)		(293,448	)
Reclassification of accounts payable from intangible assets		524,040			(197,389	)		(276,491	)
Reclassification of payable from defined benefit liabilities		69,415			(32,417	)		26,246
Reclassification of payable from plan assets		(60,320	)		28,532			(24,821	)
Disposal of treasury stock related to acquisition of financial assets		—			747,161			—
Acquisition of financial assets related to disposal of a subsidiary		—			250,000			—

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Changes in Liabilities Arising from Financing Activities (Tables)

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Summary of Changes in Liabilities Arising from Financial Activities

Details of changes in liabilities arising from financing activities, liabilities related to cashflow to be classified as future financing activities, for the years ended December 31, 2021, 2022 and 2023, are as follows:

(in millions of Korean won)	2021
	Beginning			Cash flows			Non-cash											Ending
							Newly acquired		Changes in FX rate		Fair Value changes		Acquisition and disposition of businesses		Others
Borrowing	￦	7,316,298		￦	900,394		￦	52,782	￦	196,890	￦	—	￦	15,994	￦	(44,655)		￦	8,437,703
Lease liabilities		1,143,640			(394,567	)		403,451		3		90		36,840		(30,088)			1,159,369
Derivative liabilities		130,573			(1,712	)		2,637		(4,311)		(4,892)		—		(47,119)			75,176
Derivative assets		(7,606	)		216			—		(189,700)		(17,251)		—		114,888			(99,453	)
Total	￦	8,582,905		￦	504,331		￦	458,870	￦	2,882	￦	(22,053)	￦	52,834	￦	(6,974	)	￦	9,572,795

(in millions of Korean won)	2022
	Beginning			Cash flows			Non-cash											Ending
							Newly acquired			Changes in FX rate		Fair Value changes		Acquisition and disposition of businesses		Others
Borrowing	￦	8,437,703		￦	1,391,321		￦	—		￦	146,108	￦	939	￦	—	￦	30,614	￦	10,006,685
Lease liabilities		1,159,369			(378,684	)		427,398			—		—		—		(36,045)		1,172,038
Derivative liabilities		75,176			(41,197	)		—			19,858		12,941		—		(33,223)		33,555
Derivative assets		(99,453	)		76,280			(754	)		(147,161)		30,341		—		(50,083)		(190,830	)
Total	￦	9,572,795		￦	1,047,720		￦	426,644		￦	18,805	￦	44,221	￦	—	￦	(88,737)	￦	11,021,448

(in millions of Korean won)	2023
	Beginning			Cash flows			Non-cash											Ending
							Newly acquired		Changes in FX rate		Fair value changes		Acquisition and disposition of businesses		Others
Borrowing	￦	10,006,685		￦	106,118		￦	—	￦	45,370	￦	1,719	￦	—	￦	58,273		￦	10,218,165
Lease liabilities		1,172,038			(407,051	)		460,617		—		24		—		(45,719)			1,179,909
Derivative liabilities		33,555			—			—		10,888		9,643		—		(29,539)			24,547
Derivative assets		(190,830	)		48,183			—		32,487		1,788		—		(50,839	)		(159,211	)
Total	￦	11,021,448		￦	(252,750)		￦	460,617	￦	88,745	￦	13,174	￦	—	￦	(67,824)		￦	11,263,410

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Segment Information (Tables)

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Summary of Segment Information

(2) Details of each segment for the years ended December 31, 2021, 2022 and 2023, are as follows:

	2021
(in millions of Korean won)	Operating revenues			Operating Income			Depreciation and Amortization1
ICT	￦	18,734,342		￦	1,170,920		￦	3,217,643
Finance		3,526,743			104,511			46,223
Satellite TV		665,081			61,398			60,980
Real estate		336,218			27,498			60,459
Others		6,474,858			390,903			327,202
Total		29,737,242			1,755,230			3,712,507
Elimination2		(4,531,583	)		(55,833	)		(104,869	)
Consolidated amount	￦	25,205,659		￦	1,699,397		￦	3,607,638

	2022
(in millions of Korean won)	Operating revenues			Operating Income			Depreciation and Amortization1
ICT	￦	18,697,269		￦	1,347,405		￦	3,105,807
Finance		3,615,307			119,805			47,638
Satellite TV		709,160			19,797			58,413
Real estate		474,954			113,134			65,457
Others		7,960,143			473,276			575,035
Total		31,456,833			2,073,417			3,852,350
Elimination2		(5,222,627	)		(105,260	)		(196,471	)
Consolidated amount	￦	26,234,206		￦	1,968,157		￦	3,655,879

	2023
(in millions of Korean won)	Operating revenues			Operating Income			Depreciation and Amortization1
ICT	￦	18,698,964		￦	1,193,333		￦	3,183,408
Finance		3,723,286			91,591			37,150
Satellite TV		714,574			(70,170	)		52,871
Real estate		499,997			73,496			70,653
Others		8,145,272			97,568			584,738
Total		31,782,093			1,385,818			3,928,820
Elimination2		(5,186,848	)		42,631			(118,689	)
Consolidated amount	￦	26,595,245		￦	1,428,449		￦	3,810,131

1 Sum of the amortization of tangible assets, intangible assets, investment properties, and right-of-use assets.

2 Elimination for operating revenues is the difference between operating revenue included in the CODM report, which is based on Korean IFRS and operating revenue based on IFRS. Elimination for depreciation and amortization and operating revenues also included consolidated adjustments due to intercompany transactions with the group.

Summary of Operating Revenues and Non Current Assets by Geographical Regions

(3) Operating revenues for the years ended December 31, 2021, 2022 and 2023 and non-current assets as at December 31, 2022 and 2023 by geographical regions, are as follows:

(In millions of Korean won)	Operating revenues						Non-current assets1
Location	2021		2022		2023		2022.12.31		2023.12.31
Domestic	￦	25,114,719	￦	26,074,349	￦	26,425,735	￦	20,845,214	￦	20,725,694
Overseas		90,940		159,857		169,510		270,490		183,344
Total	￦	25,205,659	￦	26,234,206	￦	26,595,245	￦	21,115,704	￦	20,909,038

1 Sum of property and equipment, intangible assets, investment properties and right-of-use assets.

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Related Party Transactions (Tables)

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Summary of Related Parties Outstanding Balances of Receivables and Payables

(2) Outstanding balances of receivables and payables in relations to transactions with related parties as of December 31, 2022 and 2023, are as follows:

		December 31, 2022
		Receivables				Payables
(in millions of Korean won)		Trade receivables		Other receivables		Trade payables		Other payables		Lease liabilities
Associates and joint ventures	K Bank, Inc.	￦	682	￦	258,999	￦	—	￦	299	￦	—
	Little Big Pictures		1,454		7,645		—		9		—
	K-Realty 11th Real Estate Investment Trust Company		151		1,283		—		—		8,824
	Others		2,285		2		3,235		2,932		—
Total		￦	4,572	￦	267,929	￦	3,235	￦	3,240	￦	8,824

 

		December 31, 2023
		Receivables						Payables
(in millions of Korean won)		Trade receivables		Other receivables		Lease receivables		Trade payables		Other payables		Lease liabilities
Associates and joint ventures	K Bank, Inc.	￦	862	￦	326,006	￦	769	￦	—	￦	299	￦	—
	Little Big Pictures		232		3,473		—		9		6		—
	K-Realty 11th Real Estate Investment Trust Company		110		1,283		—		—		—		6,732
	K-Realty No.3 Real Estate General Private Placement Investment Company		4,576		—		—		—		—		—
	Others		2,044		162		—		2,900		3,029		—
Total		￦	7,824	￦	330,924	￦	769	￦	2,909	￦	3,334	￦	6,732

Summary of Significant Transactions With Related Parties

		2021
(in millions of Korean won)		Sales		Purchases1
Associates and joint ventures	K- Realty CR-REITs No.1	￦	238,847	￦	1,308
	IGIS Professional Investors Private Investment Real Estate Investment LLC No. 395		5,000		—
	K Bank, Inc.		24,247		15,164
	Others2,3		28,092		21,302
Total			296,186		37,774

		2021
(in millions of Korean won)		Interest income		Interest expense		Dividend income
Associates and joint ventures	K- Realty CR-REITs No.1		￦—		￦205		￦40,142
	Korea Information & Technology Investment Fund (KIF Investment Fund)		223		—		—
	K Bank, Inc.		—		—		—
	Others2,3		—		—		8,637
Total		￦	223	￦	205	￦	48,779

1 Amounts include acquisition of property and equipment, and others.

2 Transaction amount before OSKENT Co., Ltd., Mission Culture Industry Limited, Sweet and Sour Culture Industry Limited, Alma Mater Culture Industry Limited, and KT Philippines are excluded from associates and joint ventures.

3 Includes transactions of Oscar Ent. before it was excluded as associates and joint ventures of the Group.

		2022
(in millions of Korean won)		Operating Revenue		Purchases1
Associates and joint ventures	K- Realty CR-REITs No.12	￦	—	￦	—
	K Bank, Inc.		29,536		11,007
	Hyundai Robotics Co., Ltd.1		94		3,799
	K-Realty 11th Real Estate Investment Trust Company		330		1,674
	Others3		11,964		37,742
Others	Digital Pharm Co., Ltd.		1		—
Total			41,925		54,222

		2022
(in millions of Korean won)		Acquisition of right-of-use assets		Interest income		Interest expense		Dividend income
Associates and joint ventures	K- Realty CR-REITs No.1 2	￦	—	￦	—	￦	—	￦	45,549
	K Bank, Inc.		—		3,052		—		—
	Hyundai Robotics Co., Ltd. 1		—		—		—		—
	K-Realty 11th Real Estate Investment Trust Company		1,966		—		260		162
	Others 3		—		—		—		9,158
Total		￦	1,966	￦	3,052	￦	260	￦	54,869

1 Amounts include acquisition of property and equipment, and others.

2 Includes transactions of the entity before it was excluded as an associate and joint venture of the Group.

3 Includes transactions of StorySoop Inc. before it was excluded as associates and joint ventures of the Group.

		2023
(in millions of Korean won)		Operating Revenue		Purchases1
Associates and joint ventures	K Bank, Inc.	￦	22,701	￦	13,429
	HD Hyundai Robotics Co., Ltd. (formerly Hyundai Robotics Co., Ltd.)		78		182
	K-Realty 11th Real Estate Investment Trust Company		346		2,559
	K-Realty No.3 Real Estate General Private Placement Investment Company		6,216		—
	Others 2 3		21,308		42,169
Others	Digital Pharm Co., Ltd.		1		—
Total			50,650		58,339

		2023
(in millions of Korean won)		Acquisition of right-of-use assets		Interest income		Interest expense		Dividend income
Associates and joint ventures	K Bank, Inc.	￦	—	￦	8,264	￦	—	￦	—
	HD Hyundai Robotics Co., Ltd.(formerly Hyundai Robotics Co., Ltd.)		—		—		—		—
	K-Realty 11th Real Estate Investment Trust Company		7		—		261		507
	Others 2 3		—		—		—		1,279
Total		￦	7	￦	8,264	￦	261	￦	1,786

1 Amounts include acquisition of property and equipment, and others.

2 Includes transactions of KD Living Co., Ltd. before it was included as a subsidiary.

3 Includes transactions of FUNDA Co., Ltd, Maruee Limited Company Specializing in the Cultural Industry, Mastern No.127 Logispoint Daegu Co., Ltd. before it was excluded as associates and joint ventures of the Group.

Summary of Key Management Compensation

(4) Key management compensation for the years ended December 31, 2021, 2022 and 2023, consists of:

(in millions of Korean won)	2021		2022		2023
Salaries and other short-term benefits	￦	2,189	￦	1,855	￦	1,494
Post-employment benefits		412		294		153
Share-based compensation		669		976		569
Total	￦	3,270	￦	3,125	￦	2,216

Summary of Fund Transactions With Related Parties

(5) Fund transactions with related parties for the years ended December 31, 2021, 2022 and 2023, are as follows:

	2021
(in millions of Korean won)	Borrowing transactions1				Equity contributions in cash
Associates and joint ventures	Borrowings		Repayments
K- REALTY CR REIT1	￦	—	￦	15,964	￦	—
K Bank, Inc.		—		—		424,957
Pacific Professional Investors Private Investment Real Estate Investment LLC No. 55		—		—		11,000
KT Young Entrepreneurs DNA Investment Fund		—		—		8,400
Mastern KT Multi-Family Real Estate Private Equity Investment Fund1		—		—		6,055
KT-IBKC Future Investment Fund1		—		—		(5,700	)
Others 2		—		—		18,176
Total	￦	—	￦	15,964	￦	462,888

1 Borrowing transactions include lease transactions.

2 Others include transactions before exclusion as associates and joint ventures of the Group.

	2022
(in millions of Korean won)	Borrowing transactions1				Equity contributions in cash
Associates and joint ventures	Borrowings		Repayments
Megazone Cloud Corporation	￦	30,000	￦	—	￦	130,001
IBK-KT Emerging Digital Industry Investment Fund		—		—		10,800
Mastern KT Multi-Family Real Estate Private Equity Investment Fund1		—		—		18,859
IGIS No. 468-1 General Private Real Estate Investment Company		—		—		25,000
K-Realty 11th Real Estate Investment Trust Company		1,916		771		—
Others		—		—		93,478
Total	￦	31,916	￦	771	￦	278,138

1 Lease transactions are included in borrowing transactions.

	2023
(in millions of Korean won)	Borrowing transactions1				Equity contributions in cash
Associates and joint ventures	Borrowings		Repayments
K-Realty 11th Real Estate Investment Trust Company	￦	—	￦	1,037	￦	—
STIC Place General Private Placement Real Estate Investment Trust No.2		—		—		20,000
Telco Credit Bureau Co.,Ltd.		—		—		6,500
Pacific geumto no.75 private hybrid asset fund		—		—		19,000
Kiamco Data Center Blind Fund		—		—		15,000
STIC Mixed Asset Investment Trust No.1		—		—		10,930
Others2		—		—		31,107
Others
Rebellions Co.,Ltd.		—		—		19,998
Total	￦	—	￦	1,037	￦	122,535

1 Lease transactions are included in borrowing transactions.

2 Includes transaction details before Daemuga Limited Company Specializing in the Cultural Industry, Maruee Limited Company Specializing in the Cultural Industry were excluded from the associates company.

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Financial Risk Management (Tables)

12 Months Ended

Dec. 31, 2023

Statement [LineItems]

Summary of Maximum Exposure to Credit Risk

The maximum exposure to credit risk of the Group’s financial instruments without considering value of collaterals as of December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	December 31, 2022		December 31, 2023
Cash and cash equivalents (except for cash on hand)	￦	2,437,629	￦	2,869,285
Trade and other receivables
Financial assets at amortized costs		7,459,994		8,458,259
Financial assets at fair value through other comprehensive income		129,124		116,198
Contract assets		802,253		832,520
Other financial assets
Derivatives financial assets for hedging		190,830		159,211
Financial assets at fair value through profit or loss		942,274		880,549
Financial assets at fair value through other comprehensive income		5,432		5,913
Financial assets at amortized costs		1,060,058		1,385,921
Total	￦	13,027,594	￦	14,707,856

Summary of Expected Credit Losses Reflect Forward-Looking Information

The expected credit losses reflect forward-looking information. Provision for impairment as of December 31, 2022 and 2023, are as follows:

	December 31, 2022
(in millions of Korean won)	Less than 6 months			7-12 months			More than 1 years			Total
Expected credit loss rate		5.57	%		25.84	%		67.16	%		—
Total carrying amounts	￦	3,443,163		￦	49,491		￦	207,396		￦	3,700,050
Provision for impairment	￦	(191,668	)	￦	(12,789	)	￦	(139,281	)	￦	(343,738	)

	December 31, 2023
(in millions of Korean won)	Less than 6 months			7-12 months			More than 1 years			Total
Expected credit loss rate		5.43	%		21.72	%		54.55	%		—
Total carrying amounts	￦	3,466,588		￦	68,772		￦	235,129		￦	3,770,489
Provision for impairment	￦	(188,086	)	￦	(14,940	)	￦	(128,264	)	￦	(331,290	)

Summary of Details of Changes in Provisions for Impairment of Trade Receivables and Other Financial Assets at Amortized Costs

1) Details of financial assets at fair value through profit or loss as of December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	December 31, 2022			December 31, 2023
Equity Instruments (Listed)	￦	26,647		￦	13,911
Equity Instruments (Unlisted)		72,517			42,185
Debt securities		942,274			880,549
Derivatives held for trading1		23,418			3,016
Total		1,064,856			939,661
Less: non-current		(609,887	)		(782,143	)
Current	￦	454,969		￦	157,518

1 According to a derivative arrangement with LS Marine Solution Co., Ltd. (formerly KT Submarine Co., Ltd.), derivative assets amounting to ￦1,015 million is included as of December 31, 2023. (Note 19).

Summary of Impairment of Trade Receivable

Impairment of trade receivable for the years ended December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	2022		2023
Impairment loss Bad debt expenses	￦	64,522	￦	69,972

Summary of Contractual Undiscounted Cash Flows

These amounts are contractual undiscounted cash flows and can differ from the amount in the consolidated financial statements.

	December 31, 2022
(in millions of Korean won)	Less than 1 year		1-5 years		More than 5 years		Total
Trade and other payables	￦	7,386,703	￦	1,009,559	￦	86,848	￦	8,483,110
Borrowings (including debentures)		2,028,207		6,972,077		2,016,472		11,016,756
Lease liabilities		313,162		615,766		407,833		1,336,761
Other non-derivative financial liabilities		33,279		209,155		93,744		336,178
Financial guarantee contracts1		21,618		—		4,588		26,206
Total	￦	9,782,969	￦	8,806,557	￦	2,609,485	￦	21,199,011

1 It is total amount guaranteed by the Group according to guarantee contracts. Cash flow from financial guarantee contracts is classified as the maturity group in the earliest period when the financial guarantee contracts can be executed.

	December 31, 2023
(in millions of Korean won)	Less than 1 year		1-5 years		More than 5 years		Total
Trade and other payables	￦	8,184,036	￦	730,340	￦	8,040	￦	8,922,416
Borrowings (including debentures)		2,922,557		6,027,323		1,743,842		10,693,722
Lease liabilities		313,431		617,561		409,174		1,340,166
Other non-derivative financial liabilities		372,743		747,221		10,073		1,130,037
Financial guarantee contracts1		13,719		103,000		—		116,719
Total	￦	11,806,486	￦	8,225,445	￦	2,171,129	￦	22,203,060

1 It is total amount guaranteed by the Group according to guarantee contracts. Cash flow from financial guarantee contracts is classified as the maturity group in the earliest period when the financial guarantee contracts can be executed.

Summary of Cash Outflow and Inflow of Derivatives Settled Gross or Net are Undiscounted Contractual Cash Flow

At the end of the reporting period, the cash outflows and inflows by maturity of the Group’s derivatives held for trading and gross-settled derivatives are as follows:

	December 31, 2021
(in millions of Korean won)	Less than 1 year		1-5 years		More than 5 years		Total
Derivatives held for trading1
Outflows	￦	—	￦	158,284	￦	—	￦	158,284
Derivatives settled gross2
Outflows	￦	843,489	￦	1,857,942	￦	377,302	￦	3,078,733
Inflows		856,508		1,917,236		394,134		3,167,878

	December 31, 2022
(in millions of Korean won)	Less than 1 year		1-5 years		More than 5 years		Total
Derivatives held for trading1
Outflows	￦	—	￦	101,994	￦	930	￦	102,924
Derivatives settled gross2
Outflows	￦	472,005	￦	2,493,858	￦	28,786	￦	2,994,649
Inflows		550,478		2,670,002		37,873		3,258,353

	December 31, 2023
(in millions of Korean won)	Less than 1 year		1-5 years		More than 5 years		Total
Derivatives held for trading1
Outflows	￦	—	￦	133,293	￦	—	￦	133,293
Inflows		—		—		1,015		1,015
Derivatives settled gross2
Outflows	￦	741,140	￦	1,227,166	￦	8,126	￦	1,976,432
Inflows		614,066		2,198,958		36,344		2,849,368

1 During the year ended December 31, 2023, derivative liabilities held-for-trading are classified under the ‘more than one year to less than five years’ category as they are relevant to the fair value of derivatives liabilities related to shareholder-to-share contracts (Note 19).

As these derivatives held-for-trading are managed based on net fair value, their contractual maturities are not necessarily taking into consideration to understand the timing of cash flows.

2 Cash outflow and inflow of gross-settled derivatives are undiscounted contractual cash flow and may differ from the amount in the consolidated statement of financial position.

Summary of Debt-to-equity Ratios

The debt-to-equity ratios as of December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	December 31, 2022			December 31, 2023
Total liabilities	￦	22,577,114		￦	24,249,073
Total equity		18,412,696			18,542,575
Debt-to-equity ratio		123	%		131	%

The Group manages capital on the basis of the gearing ratio. This ratio is calculated as net debt divided by total capital. Net debt is calculated as total borrowings less cash and cash equivalents. Total capital is calculated as ‘equity’ in the statement of financial position plus net debt.

The gearing ratios as of December 31, 2022 and 2023, are as follows:

(in millions of Korean won, %)	December 31, 2022			December 31, 2023
Total borrowings	￦	10,006,685		￦	10,218,165
Less: cash and cash equivalents		(2,449,062	)		(2,879,554	)
Net debt		7,557,623			7,338,611
Total equity		18,412,696			18,542,575
Total capital		25,970,319			25,881,186
Gearing ratio		29	%		28	%

Summary of Group's Recognized Financial Assets Subject to Enforceable Master Netting Arrangements or Similar Agreements

1) Details of the Group’s recognized financial assets subject to enforceable master netting arrangements or similar agreements are as follows:

(in millions of Korean won)	December 31, 2022
	Gross assets		Gross liabilities offset			Net amounts presented in the statement of financial position		Amounts not offset					Net amount
								Financial instruments			Cash collateral
Trade receivables	￦	60,512	￦	—		￦	60,512	￦	(44,518	)	￦	—	￦	15,994
Other financial assets		764		(764	)		—		—			—		—
Total	￦	61,276	￦	(764	)	￦	65,012	￦	(44,518	)	￦	—	￦	15,994

(in millions of Korean won)	December 31, 2023
	Gross assets		Gross liabilities offset			Net amounts presented in the statement of financial position		Amounts not offset					Net amount
								Financial instruments			Cash collateral
Trade receivables	￦	78,415	￦	(1,407	)	￦	77,008	￦	(59,148	)	￦	—	￦	17,860
Other financial assets		759		(757	)		2		(2	)		—		—
Total	￦	79,174	￦	(2,164	)	￦	77,010	￦	(59,150	)	￦	—	￦	17,860

Summary of Group's Recognized Financial Liabilities Subject to Enforceable Master Netting Arrangements or Similar Agreements

2) The Group’s recognized financial liabilities subject to enforceable master netting arrangements or similar agreements are as follows:

(in millions of Korean won)

December 31, 2022

Gross liabilities

Gross assets offset

Net amounts presented in the statement of financial position

Amounts not offset

Net amount

Financial instruments

Cash collateral

Trade payables

￦

47,271

￦

(764

)

￦

46,507

￦

(44,518

)

￦

—

￦

1,989

(in millions of Korean won)	December 31, 2023
	Gross liabilities		Gross assets offset			Net amounts presented in the statement of financial position		Amounts not offset					Net amount
								Financial instruments			Cash collateral
Trade payables	￦	59,602	￦	(757	)	￦	58,845	￦	(56,196	)	￦	—	￦	2,649
Other financial assets		4,362		(1,407	)		2,955		(2,955	)		—		—
Total	￦	63,964	￦	(2,164	)	￦	61,800	￦	(59,151	)	￦	—	￦	2,649

Trade receivables [member]

Statement [LineItems]

Summary of Details of Changes in Provisions for Impairment of Trade Receivables and Other Financial Assets at Amortized Costs

Details of changes in provisions for impairment of trade receivables the years ended December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	2022			2023
Beginning balance	￦	349,725		￦	343,738
Provision		64,522			69,972
Written-off		(68,298	)		(80,126	)
Others		(2,211	)		(2,294	)
Ending balance	￦	343,738		￦	331,290

Other Financial Assets At Amortized Cost [Member]

Statement [LineItems]

Summary of Details of Changes in Provisions for Impairment of Trade Receivables and Other Financial Assets at Amortized Costs

Details of changes in provisions for impairment of other financial assets at amortized costs for the years ended December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	2022			2023
Beginning balance	￦	201,387		￦	218,543
Provision		65,941			114,501
Written-off		(51,383	)		(150,014	)
Reversal		(850	)		(14,941	)
Others		3,448			15,547
Ending balance	￦	218,543		￦	183,636

Currency risk [Member]

Statement [LineItems]

Summary of Exposures to Risks, Effects on Profit before Income Tax and Shareholders' Equity

As of December 31, 2021, 2022 and 2023, if the foreign exchange rate had strengthened/weakened by 10% with all other variables held constant, the effects on profit before income tax and shareholders’ equity would have been as follows:

(in millions of Korean won)	Fluctuation of foreign exchange rate			Impact on profit before income tax1			Impact on equity
2021.12.31		10	%	￦	(3,433	)	￦	8,692
		-10	%		3,433			(8,692	)
2022.12.31		10	%	￦	(5,841	)	￦	(15,836	)
		-10	%		5,841			15,836
2023.12.31		10	%	￦	(10,313	)	￦	(18,460	)
		-10	%		10,313			18,460

Summary of Details of Financial Assets and Liabilities in Foreign Currencies

Details of financial assets and liabilities in foreign currencies as at December 31, 2021, 2022 and 2023, are as follows:

(In thousands of foreign currencies)	2021				2022				2023
	Financial assets		Financial liabilities		Financial assets		Financial liabilities		Financial assets		Financial liabilities
USD		245,759		2,302,642		106,426		2,336,607		139,807		2,271,673
SDR1		255		722		255		722		254		722
JPY		29,227		30,000,763		32,801		400,002		17,496		400,002
GBP		—		1,005		30		83		—		—
EUR		3,943		10,801		185		7,832		304		7,810
RWF2		586		—		15,521		13,025		402		—
THB3		2,160		—		265		—		244		—
TZS4		1,644		—		1,464		—		21,958		—
BWP5		93		—		183		—		680		—
HKD6		—		105		37		—		—		—
VND7		257,895		—		280,226		—		380,629		—
SGD8		13		284,000		448		284,000		1,375		—
TWD9		—		226		—		—		1,685		—
CHF10		—		161		—		—		—		25
MYR11		—		—		1		—		—		—
BGN12		—		—		62		—		—		—
PKR13		—		—		—		—		114,025		—

1 Special Drawing Rights.

2 Rwanda Franc.

3 Thailand Bhat.

4 Tanzanian Shilling.

5 Botswana Pula.

6 Hong Kong Dollar.

7 Vietnam Dong.

8 Singapore Dollar.

9 Taiwan Dollar.

10 Swiss Franc.

11 Ringgit Malaysia.

12 Bulgarian Lev.

13 Pakistani rupee

Equity price risk [Member]

Statement [LineItems]

Summary of Exposures to Risks, Effects on Profit before Income Tax and Shareholders' Equity

As of December 31, 2021, 2022 and 2023, the Group is exposed to equity securities price risk because the securities held by the Group are traded in active markets. If the market prices had increased/decreased by 10% with all other variables held constant, the effects on profit before income tax and equity would have been as follows:

(in millions of Korean won)	Fluctuation of price	Impact on profit before income tax			Impact on equity
2021.12.31	10%	￦	2,000		￦	4,588
	-10%		(2,000	)		(4,588	)
2022.12.31	10%	￦	2,660		￦	113,948
	-10%		(2,660	)		(113,948	)
2023.12.31	10%	￦	1,473		￦	121,423
	-10%		(1,473	)		(121,423	)

Interest rate risk [Member]

Statement [LineItems]

Summary of Exposures to Risks, Effects on Profit before Income Tax and Shareholders' Equity

As of December 31, 2021, 2022 and 2023, if the market interest rate had increased/decreased by 100 bp with other variables held constant, the effects on profit before income tax and shareholders’ equity would be as follows:

(in millions of Korean won)	Fluctuation of interest rate		Impact on profit before income tax			Impact on equity
2021.12.31		+ 100 bp	￦	753		￦	5,549
		- 100 bp		(731	)		(5,675	)
2022.12.31		+ 100 bp	￦	635		￦	(2,045	)
		- 100 bp		(669	)		2,100
2023.12.31		+ 100 bp	￦	(2,693	)	￦	(4,718	)
		- 100 bp		2,696			5,037

XML

Fair Value (Tables)

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Summary of Carrying Amount and Fair Value of Financial Instruments by Category

Carrying amount and fair value of financial instruments by category as of December 31, 2022 and 2023, are as follows:

	December 31, 2022				December 31, 2023
(in millions of Korean won)	Carrying amount		Fair value		Carrying amount		Fair value
Financial assets
Cash and cash equivalents	￦	2,449,062		1	￦	2,879,554		1
Trade and other receivables
Financial assets measured at amortized cost2		7,364,516		1		8,326,229		1
Financial assets at fair value through other comprehensive income		129,124		129,124		116,198		116,198
Other financial assets
Financial assets measured at amortized cost		1,060,058		1		1,385,921		1
Financial assets at fair value through profit or loss		1,064,856		1,064,856		939,661		939,661
Financial assets at fair value through other comprehensive income		1,508,192		1,508,192		1,680,168		1,680,168
Derivative financial assets for hedging		190,830		190,830		159,211		159,211
Total	￦	13,766,638			￦	15,486,942
Financial liabilities
Trade and other payables3	￦	8,397,264		1	￦	8,317,822		1
Borrowings		10,006,685		9,405,992		10,218,165		9,979,545
Other financial liabilities
Financial liabilities at amortized cost		246,606		1		915,185		1
Financial liabilities at fair value through profit or loss		141,280		141,280		136,106		136,106
Derivative financial liabilities for hedging purpose		33,555		33,555		24,547		24,547
Total	￦	18,825,390			￦	19,611,825

1 The Group did not conduct fair value estimation since the book amount is a reasonable approximation of the fair value.

2 Lease receivables are excluded from fair value disclosure in accordance with IFRS 7.

3 Amounts related to employee benefit plans are included in trade and other payables at the end of previous year.

Summary of Fair Value Hierarchy Classifications of Financial Assets and Financial Liabilities That are Measured at Fair Value

Fair value hierarchy classifications of the financial assets and financial liabilities that are measured at fair value disclosed in fair value as of December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	December 31, 2022
	Level 1		Level 2		Level 3		Total
Assets
Trade and other receivables
Financial assets at fair value through other comprehensive income	￦	—	￦	129,124	￦	—	￦	129,124
Other financial assets
Financial assets at fair value through profit or loss		26,647		426,140		612,069		1,064,856
Financial assets at fair value through other comprehensive income		1,005,900		5,163		497,129		1,508,192
Derivative financial assets for hedging		—		189,717		1,113		190,830
Investment properties		—		—		5,370,047		5,370,047
Total	￦	1,032,547	￦	750,144	￦	6,480,358	￦	8,263,049
Liabilities
Borrowings	￦	—	￦	9,405,992	￦	—	￦	9,405,992
Other financial liabilities
Financial liabilities at fair value through profit or loss		—		—		141,280		141,280
Derivative financial liabilities for hedging purpose		—		33,555		—		33,555
Total	￦	—	￦	9,439,547	￦	141,280	￦	9,580,827

(in millions of Korean won)	December 31, 2023
	Level 1		Level 2		Level 3		Total
Assets
Trade and other receivables
Financial assets at fair value through other comprehensive income	￦	—	￦	116,198	￦	—	￦	116,198
Other financial assets
Financial assets at fair value through profit or loss		13,911		156,918		768,832		939,661
Financial assets at fair value through other comprehensive income		1,230,936		5,206		444,026		1,680,168
Derivative financial assets for hedging		—		159,211		—		159,211
Investment properties		—		—		5,276,169		5,276,169
Total	￦	1,244,847	￦	437,533	￦	6,489,027	￦	8,171,407
Liabilities
Borrowings	￦	—	￦	9,979,545	￦	—	￦	9,979,545
Other financial liabilities
Financial liabilities at fair value through profit or loss		—		1,545		134,561		136,106
Derivative financial liabilities for hedging purpose		—		24,547		—		24,547
Total	￦	—	￦	10,005,637	￦	134,561	￦	10,140,198

Summary of Changes in Level 3 of Fair Value Hierarchy for Recurring Fair Value Measurements

Details of changes in Level 3 of the fair value hierarchy for the recurring fair value measurements as of December 31, 2022 and 2023, are as follows:

	2022
	Financial assets						Financial liabilities
(in millions of Korean won)	Financial assets at fair value through profit or loss			Financial assets at fair value through other comprehensive income			Derivative financial assets for hedging		Financial liabilities at fair value through profit or loss
Beginning balance	￦	577,085		￦	323,373		￦	31,565	￦	215,332
Acquisition		226,310			262,408			—		3,046
Reclassification		(8,962	)		8,122			—		(54,921	)
Acquisition and disposition of businesses		—			(40	)		—		—
Disposal		(179,740	)		(97,426	)		(31,565)		—
Amount recognized in profit or loss1		(2,624	)		18			—		(22,177	)
Amount recognized in other comprehensive income2		—			674			1,113		—
Ending balance	￦	612,069		￦	497,129		￦	1,113	￦	141,280

1 The recognition of gains and losses on derivatives financial liabilities (assets) for hedging purposes consists entirely of derivatives valuation losses.

2 The recognition of gains and losses on financial liabilities measured at fair value through profit or loss consists of derivative valuation losses.

	2023
	Financial assets						Financial liabilities
(in millions of Korean won)	Financial assets at fair value through profit or loss			Financial assets at fair value through other comprehensive income			Derivative financial assets for hedging		Financial liabilities at fair value through profit or loss
Beginning balance	￦	612,069		￦	497,129		￦	1,113	￦	141,280
Acquisition		216,838			10,267			—		—
Reclassification		26,471			(5,532	)		(1,113)		(7,363	)
Acquisition and disposition of businesses		252			—			—		—
Disposal		(44,323	)		(6	)		—		(5,205	)
Amount recognized in profit or loss 1,		(42,475	)		(61	)		—		5,849
Amount recognized in other comprehensive income		—			(57,771	)		—		—
Ending balance	￦	768,832		￦	444,026		￦	—	￦	134,561

1 The recognition of gains and losses on financial liabilities measured at fair value through profit or loss consists of derivative valuation gains and losses.

Summary of Valuation Techniques and Inputs

Valuation techniques and inputs used in the recurring, non-recurring fair value measurements and disclosed fair values categorized within Level 2 and Level 3 of the fair value hierarchy as of December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	December 31, 2022
	Fair value		Level		Valuation techniques	Inputs
Assets
Trade and other receivables
Financial assets at fair value through other comprehensive income	￦	129,124		2	DCF Model	Guaranteed bond interest rate
Other financial assets
Financial assets at fair value through profit or loss		1,038,209		2,3	DCF Model, Adjusted Net Asset Model, Monte-Carlo Simulation	Market Interest rate, Underlying asset price
Financial assets at fair value through other comprehensive income		502,292		2,3	DCF Model, Market Approach Model	Discount rate
Derivative financial assets for hedging		190,830		2,3	DCF Model	Market observation discount rate, Swap interest rate
Investment properties		5,370,047		3	DCF Model
Liabilities
Borrowings	￦	9,405,992		2	DCF Model	Bond interest rate
Other financial liabilities
Financial liabilities at fair value through profit or loss		141,280		3	DCF Model, Binomial Option Pricing Model, Monte-Carlo Simulation	Forward exchange rate Forward interest rate
Derivative financial liabilities for hedging		33,555		2	DCF Model	Market observation discount rate

(in millions of Korean won)	December 31, 2023
	Fair value		Level		Valuation techniques	Inputs
Assets
Trade and other receivables
Financial assets at fair value through other comprehensive income	￦	116,198		2	DCF Model	Guaranteed bond interest rate
Other financial assets
Financial assets at fair value through profit or loss		925,750		2,3	DCF Model, Adjusted Net Asset Model, Monte-Carlo Simulation	Market Interest rate, Underlying asset price
Financial assets at fair value through other comprehensive income		449,232		2,3	DCF Model, Market Approach Model	Discount rate
Derivative financial assets for hedging		159,211		2	DCF Model	Market observation discount rate, Swap interest rate
Investment properties		5,276,169		3	DCF Model
Liabilities
Borrowings	￦	9,979,545		2	DCF Model	Bond interest rate
Other financial liabilities
Financial liabilities at fair value through profit or loss		136,106		2,3	DCF Model, Binomial Option Pricing Model,	Forward exchange rate Forward interest rate
Derivative financial liabilities for hedging		24,547		2	DCF Model	Market observation discount rate

Summary of Details and Changes of Total Deferred Difference

In relation to this, details and changes of the total deferred difference for the years ended December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	2022			2023
	Derivatives used for hedging			Derivatives used for hedging
I. Beginning balance	￦	832		￦	—
II. New transactions		—			—
III. Recognized at fair value through profit or loss		(832	)		—
IV. Ending balance (I+II+III)	￦	—		￦	—

XML

Interests in Unconsolidated Structured Entities (Tables)

12 Months Ended

Dec. 31, 2023

Investments accounted for using equity method [abstract]

Summary of Unconsolidated Structured Entities and Nature of Risks

(2) Details of scale of unconsolidated structured entities and nature of the risks associated with an entity’s interests in unconsolidated structured entities as of December 31, 2022 and 2023, are as follows:

(in millions of Korean won)	December 31, 2022
	Real Estate Finance		PEF and Investment Funds		Asset Securitization		Total
Total assets of unconsolidated structured entities	￦	3,539,827	￦	5,580,445	￦	2,044,989	￦	11,165,261
Assets recognized in statement of financial position
Other financial assets	￦	77,819	￦	237,907	￦	—	￦	315,726
Joint ventures and associates		123,138		268,275		—		391,413
Total	￦	200,957	￦	506,182	￦	—	￦	707,139
Maximum loss exposure1
Investment assets	￦	200,957	￦	506,182	￦	—	￦	707,139
Investment agreement and others2		40,914		91,224		—		132,138
Total	￦	241,871	￦	597,406	￦	—	￦	839,277

1 Includes the investments recognized in the Group’s financial statements and the amounts which are probable to be determined when certain conditions are met.

2 Investment agreements and others include purchase agreements, credit granting and others.

(in millions of Korean won)	December 31, 2023
	Real Estate Finance		PEF and Investment Funds		Asset Securitization		Total
Total assets of unconsolidated structured entities	￦	7,890,823	￦	4,833,966	￦	1,846,270	￦	14,571,059
Assets recognized in statement of financial position
Other financial assets	￦	216,040	￦	227,266	￦	—	￦	443,306
Joint ventures and associates		144,517		282,550		—		427,067
Total	￦	360,557	￦	509,816	￦	—	￦	870,373
Maximum loss exposure 1
Investment assets	￦	360,557	￦	509,816	￦	—	￦	870,373
Investment agreement and others 2		44,975		106,064		—		151,039
Total	￦	405,532	￦	615,880	￦	—	￦	1,021,412

1 Includes the investments recognized in the Group’s financial statements and the amounts which are probable to be determined when certain conditions are met.

2 Investment agreements and others include purchase agreements, credit granting and others.

XML

Information About Non-controlling Interests (Tables)

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Summary of changes in accumulated non-controlling interests

Profit or loss allocated to non-controlling interests and accumulated non-controlling interests of subsidiaries that are material to the Group for the years ended December 31, 2021, 2022 and 2023 are as follows:

(In millions of Korean won)	December 31, 2021
	Non- controlling Interests rate (%)			Accumulated non-controlling interests at the beginning of the year		Profit or loss allocated to non-controlling interests		Dividends paid to non- controlling interests			Others			Accumulated non-controlling interests at the end of the year
KT Skylife Co., Ltd.		49.7	%	￦	388,900	￦	24,795	￦	(8,279	)	￦	5,279		￦	410,695
BC Card Co., Ltd.		30.5	%		411,826		34,496		(6,434	)		59,040			498,928
KTIS Corporation		68.6	%		120,071		17,715		(1,837	)		(709	)		135,240
KTCS Corporation		79.7	%		129,502		21,394		(2,211	)		(3,574	)		145,111
Nasmedia, Co., Ltd.		56.0	%		112,549		15,185		(3,808	)		255			124,181

(In millions of Korean won)	December 31, 2022
	Non- controlling Interests rate (%)			Accumulated non-controlling interests at the beginning of the year		Profit or loss allocated to non-controlling interests		Dividends paid to non- controlling interests			Others			Accumulated non-controlling interests at the end of the year
KT Skylife Co., Ltd.		49.8	%	￦	410,695	￦	7,127	￦	(8,284	)	￦	13,651		￦	423,189
BC Card Co., Ltd.		30.5	%		498,928		47,909		(7,641	)		(14,539	)		524,657
KTIS Corporation		66.7	%		135,240		14,965		(2,226	)		(6,577	)		141,402
KTCS Corporation		78.3	%		145,111		18,888		(2,721	)		(7,397	)		153,881
Nasmedia, Co., Ltd.		56.0	%		124,181		15,610		(4,187	)		(179	)		135,425

(In millions of Korean won)	December 31, 2023
	Non- controlling Interests rate (%)			Accumulated non-controlling interests at the beginning of the year		Profit or loss allocated to non-controlling interests			Dividends paid to non- controlling interests			Others			Accumulated non-controlling interests at the end of the year
KT Skylife Co., Ltd.		49.4	%	￦	423,189	￦	(47,355	)	￦	(8,287	)	￦	(6,192	)	￦	361,355
BC Card Co., Ltd.		30.5	%		524,657		25,355			(4,960	)		3,023			548,075
KTIS Corporation		66.7	%		141,402		5,947			(2,451	)		(1,872	)		143,026
KTCS Corporation		78.3	%		153,881		14,228			(3,001	)		(2,313	)		162,795
Nasmedia Co., Ltd		55.9	%		135,425		10,679			(4,028	)		(467	)		141,609

Summary of financial information on subsidiaries

	December 31, 2022
(in millions of Korean won)	KT Skylife Co., Ltd.		BC Card Co., Ltd.		KTIS Corporation		KTCS Corporation		Nasmedia, Co., Ltd.
Current assets	￦	420,701	￦	3,152,622	￦	102,121	￦	296,209	￦	435,359
Non-current assets		938,465		2,513,453		294,087		123,517		81,586
Current liabilities		274,637		2,879,551		103,698		188,379		261,381
Non-current liabilities		229,042		1,229,649		95,506		40,240		14,349
Equity		855,487		1,556,875		197,004		191,107		241,215
	December 31, 2023
(in millions of Korean won)	KT Skylife Co., Ltd.		BC Card Co., Ltd.		KTIS Corporation		KTCS Corporation		Nasmedia, Co., Ltd.
Current assets	￦	425,661	￦	3,739,847	￦	111,313	￦	304,508	￦	411,774
Non-current assets		795,182		2,613,031		336,296		130,391		101,537
Current liabilities		353,839		3,661,263		116,271		187,621		251,207
Non-current liabilities		125,531		1,061,169		127,248		47,228		11,129
Equity		741,473		1,630,446		204,090		200,050		250,975

Summary of consolidated statements of comprehensive income

Summarized consolidated statements of comprehensive income for the years ended December 31, 2021,2022 and 2023 are as follows:

	2021
(in millions of Korean won)	KT Skylife Co., Ltd.		BC Card Co., Ltd.			KTIS Corporation			KTCS Corporation			Nasmedia, Co., Ltd.
Operating revenue	￦	772,950	￦	3,580,970		￦	487,801		￦	968,499		￦	125,876
Profit for the year		62,309		120,308			24,944			19,034			27,120
Other comprehensive income (loss)		12,686		2,270			3,725			(2,120	)		871
Total comprehensive income		74,995		122,578			28,669			16,914			27,991
	2022
(in millions of Korean won)	KT Skylife Co., Ltd.		BC Card Co., Ltd.			KTIS Corporation			KTCS Corporation			Nasmedia, Co., Ltd.
Operating revenue	￦	1,038,468	￦	3,897,090		￦	536,229		￦	1,031,010		￦	153,210
Profit for the year		20,941		148,341			15,917			17,634			27,691
Other comprehensive income (loss)		13,544		(5,286	)		(2,415	)		(134	)		(695	)
Total comprehensive income		34,485		143,055			13,502			17,500			26,996

	2023
(in millions of Korean won)	KT Skylife Co., Ltd.			BC Card Co., Ltd.		KTIS Corporation			KTCS Corporation			Nasmedia, Co., Ltd.
Operating revenue	￦	1,034,342		￦	4,027,450	￦	593,162		￦	1,035,911		￦	147,934
Profit for the year		(109,407	)		76,545		13,922			15,804			17,703
Other comprehensive income (loss)		(6,625	)		13,832		(3,162	)		(2,550	)		(1,890	)
Total comprehensive income		(116,032	)		90,377		10,760			13,254			15,813

Summary of consolidated statements of cash flows

Summarized consolidated statements of cash flows for the years ended December 31, 2021,2022 and 2023 are as follows:

	2021
(in millions of Korean won)	KT Skylife Co., Ltd.			BC Card Co., Ltd.			KTIS Corporation			KTCS Corporation			Nasmedia, Co., Ltd.
Cash flows from operating activities	￦	102,947		￦	(157,645	)	￦	49,011		￦	6,945		￦	44,500
Cash flows from investing activities		(352,116	)		(283,313	)		(27,143	)		(1,039	)		(16,966	)
Cash flows from financing activities		230,010			526,563			(23,126	)		(16,622	)		(9,843	)
Net increase (decrease) in cash and cash equivalents		(19,159	)		85,605			(1,258	)		(10,716	)		17,691
Cash and cash equivalents at beginning of year		99,834			240,584			31,779			75,440			53,720
Exchange differences		(3	)		293			—			(840	)		(15	)
Cash and cash equivalents at end of the year		80,672			326,482			30,521			63,884			71,396

	2022
(in millions of Korean won)	KT Skylife Co., Ltd.			BC Card Co., Ltd.			KTIS Corporation			KTCS Corporation			Nasmedia, Co., Ltd.
Cash flows from operating activities	￦	176,407		￦	(798,043	)	￦	13,809		￦	19,423		￦	22,015
Cash flows from investing activities		(78,928	)		(7,733	)		9,813			13,245			3,845
Cash flows from financing activities		(79,455	)		914,441			(29,199	)		(35,578	)		(11,136	)
Net increase (decrease) in cash and cash equivalents		18,024			108,665			(5,577	)		(2,910	)		14,724
Cash and cash equivalents at beginning of year		80,672			326,482			30,521			63,884			71,396
Exchange differences		(1	)		(100	)		—			840			13
Cash and cash equivalents at end of the year		98,695			435,047			24,944			61,814			86,133

	2023
(in millions of Korean won)	KT Skylife Co., Ltd.			BC Card Co., Ltd.			KTIS Corporation			KTCS Corporation			Nasmedia, Co., Ltd.
Cash flows from operating activities	￦	207,207		￦	82,883		￦	50,892		￦	55,146		￦	8,116
Cash flows from investing activities		(125,343	)		(74,430	)		(17,636	)		(5,901	)		(30,910	)
Cash flows from financing activities		(50,811	)		(67,609	)		(32,872	)		(26,948	)		(11,077	)
Net increase (decrease) in cash and cash equivalents		31,053			(59,156	)		384			22,297			(33,871	)
Cash and cash equivalents at beginning of year		98,695			435,047			24,944			61,814			86,133
Exchange differences		—			(95	)		—			—			15
Cash and cash equivalents at end of the year		129,748			375,796			25,328			84,111			52,277

Summary of changes in ownership interest on the equity attributable to owners

(in millions of Korean won)	2021		2022		2023
Carrying amount of non-controlling interests acquired	￦	14,702	￦	19,272	￦	3,022
Consideration paid to non-controlling interests		1,095		69,652		213,819
Effect of changes in equity (net amount)	￦	15,797	￦	88,924	￦	216,841

XML

Events After the Reporting Period (Tables)

12 Months Ended

Dec. 31, 2023

Text block [abstract]

Summary of public bonds issued after reporting period

(2) The company issued the following bonds after the end of the reporting period (unit: ￦ million).

Type	Issued Date		Annual interest rates			Maturity		Korean won
The 200-1st Public bond		Feb. 27, 2024		3.552	%		Feb. 27, 2026-		120,000
The 200-2nd Public bond		Feb. 27, 2024		3.608	%		Feb. 26, 2027-		200,000
The 200-3rd Public bond		Feb. 27, 2024		3.548	%		Feb. 27, 2029-		80,000

XML

General Information - Additional Information (Detail) - shares	Jul. 02, 2001	May 29, 1999
Disclosure of general information [line items]
Number of additional shares issued	55,502,161	24,282,195
Government Owned shares [member]
Disclosure of general information [line items]
Number of additional shares issued		20,813,311

XML

General Information - Summary of Consolidated Subsidiaries (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure of subsidiaries [line items]
Total assets	₩ 42,791,647	₩ 40,989,810
Total liabilities	24,249,073	22,577,114
Operating revenues	26,287,201	25,638,855	₩ 24,898,005
Profit (loss) for the year	₩ 972,182	₩ 1,385,635	₩ 1,459,395
KT Linkus Co., Ltd [member]
Disclosure of subsidiaries [line items]
Subsidiary	KT Linkus Co., Ltd.	KT Linkus Co., Ltd.	KT Linkus Co., Ltd
Type of Business	Public telephone maintenance
Location	Korea
Controlling percentage ownership	92.40%	92.40%
Closing month	December
Total assets	₩ 64,178	₩ 47,734	₩ 54,219
Total liabilities	63,452	47,498	53,316
Operating revenues	81,645	76,135	81,434
Profit (loss) for the year	₩ 821	₩ (614)	₩ (3,095)
KT Submarine Co., Ltd. [member]
Disclosure of subsidiaries [line items]
Subsidiary		KT Submarine Co., Ltd.	KT Submarine Co., Ltd.
Total assets		₩ 120,255	₩ 110,390
Total liabilities		7,884	10,736
Operating revenues		42,848	31,374
Profit (loss) for the year		₩ (12,126)	₩ (3,183)
KT Telecop Co., Ltd. [member]
Disclosure of subsidiaries [line items]
Subsidiary	KT Telecop Co., Ltd.	KT Telecop Co., Ltd.	KT Telecop Co., Ltd.
Type of Business	Security service
Location	Korea
Controlling percentage ownership	86.80%	86.80%
Closing month	December
Total assets	₩ 375,596	₩ 370,004	₩ 363,224
Total liabilities	235,947	230,965	233,797
Operating revenues	527,015	517,406	515,456
Profit (loss) for the year	₩ 5,728	₩ 4,267	₩ 3,985
KT Alpha Co Ltd [Member]
Disclosure of subsidiaries [line items]
Subsidiary	KT Alpha Co., Ltd.
Type of Business	Data communication
Location	Korea
Controlling percentage ownership	73.00%	73.00%
Closing month	December
Total assets	₩ 443,639
Total liabilities	191,254
Operating revenues	437,308
Profit (loss) for the year	₩ 19,352
KT Alpha Co., Ltd. (KT Hitel Co., Ltd.) [member]
Disclosure of subsidiaries [line items]
Subsidiary		KT Alpha Co., Ltd.(KT Hitel Co., Ltd.)	KT Alpha Co., Ltd. (KT Hitel Co., Ltd.)
Total assets		₩ 406,236	₩ 390,671
Total liabilities		172,211	172,767
Operating revenues		516,737	471,870
Profit (loss) for the year		₩ 13,115	₩ (8,692)
KT Service Bukbu Co., Ltd. [member]
Disclosure of subsidiaries [line items]
Subsidiary	KT Service Bukbu Co., Ltd.	KT Service Bukbu Co., Ltd.	KT Service Bukbu Inc.
Type of Business	Opening services of fixed line
Location	Korea
Controlling percentage ownership	67.30%	67.30%
Closing month	December
Total assets	₩ 63,760	₩ 74,673	₩ 59,341
Total liabilities	55,360	65,820	54,070
Operating revenues	242,119	252,304	231,602
Profit (loss) for the year	₩ 1,212	₩ 3,227	₩ 1,128
KT Service Nambu Co., Ltd. [member]
Disclosure of subsidiaries [line items]
Subsidiary	KT Service Nambu Co., Ltd.	KT Service Nambu Co., Ltd.	KT Service Nambu Inc.
Type of Business	Opening services of fixed line
Location	Korea
Controlling percentage ownership	77.30%	77.30%
Closing month	December
Total assets	₩ 71,576	₩ 80,450	₩ 62,513
Total liabilities	58,745	66,479	52,695
Operating revenues	291,170	301,720	271,174
Profit (loss) for the year	₩ 1,354	₩ 3,067	₩ 1,430
KT Commerce Inc. [member]
Disclosure of subsidiaries [line items]
Subsidiary	KT Commerce Inc.
Type of Business	B2C, B2B service
Location	Korea
Controlling percentage ownership	100.00%	100.00%
Closing month	December
KT Strategic Investment Fund No.3 [member]
Disclosure of subsidiaries [line items]
Subsidiary	KT Strategic Investment Fund No.3
Type of Business	Investment fund
Location	Korea
Controlling percentage ownership	100.00%	100.00%
Closing month	December
KT Strategic Investment Fund No.4 [member]
Disclosure of subsidiaries [line items]
Subsidiary	KT Strategic Investment Fund No.4
Type of Business	Investment fund
Location	Korea
Controlling percentage ownership	100.00%	100.00%
Closing month	December
KT Strategic Investment Fund No.5 [member]
Disclosure of subsidiaries [line items]
Subsidiary	KT Strategic Investment Fund No.5
Type of Business	Investment fund
Location	Korea
Controlling percentage ownership	100.00%	100.00%
Closing month	December
BC-VP Strategic Investment Fund No.1 [member]
Disclosure of subsidiaries [line items]
Subsidiary	BC-VP Strategic Investment Fund No.1
Type of Business	Investment fund
Location	Korea
Controlling percentage ownership	100.00%	100.00%
Closing month	December
BC Card Co., Ltd. [member]
Disclosure of subsidiaries [line items]
Subsidiary	BC Card Co., Ltd.	BC Card Co., Ltd.	BC Card Co., Ltd.
Type of Business	Credit card business
Location	Korea
Controlling percentage ownership	69.50%	69.50%
Closing month	December
Total assets	₩ 6,352,878	₩ 5,666,075	₩ 3,933,427
Total liabilities	4,722,432	4,109,200	2,481,004
Operating revenues	4,027,450	3,897,090	3,580,970
Profit (loss) for the year	₩ 76,545	₩ 148,341	₩ 120,308
VP Inc. [Member]
Disclosure of subsidiaries [line items]
Subsidiary	VP Inc.
Type of Business	Payment security service for credit card, others
Location	Korea
Controlling percentage ownership	72.20%	69.70%
Closing month	December
H&C Network [member]
Disclosure of subsidiaries [line items]
Subsidiary	H&C Network	H&C Network	H&C Network Co., Ltd.
Type of Business	Call center for financial sectors
Location	Korea
Controlling percentage ownership	100.00%	100.00%
Closing month	December
Total assets	₩ 81,107	₩ 82,737	₩ 88,616
Total liabilities	4,863	6,640	4,993
Operating revenues	27,205	27,392	227,604
Profit (loss) for the year	₩ 1,814	₩ 992	₩ 11,995
BC Card China Co., Ltd. [member]
Disclosure of subsidiaries [line items]
Subsidiary	BC Card China Co., Ltd.
Type of Business	Software development and data processing
Location	China
Controlling percentage ownership	100.00%	100.00%
Closing month	December
INITECH Co., Ltd. [Member]
Disclosure of subsidiaries [line items]
Subsidiary	INITECH Co., Ltd.
Type of Business	Internet banking ASP and security solutions
Location	Korea
Controlling percentage ownership	63.90%	61.30%
Closing month	December
Smartro Co., Ltd. [Member]
Disclosure of subsidiaries [line items]
Subsidiary	Smartro Co., Ltd
Type of Business	VAN (Value Added Network) business
Location	Korea
Controlling percentage ownership	64.50%	64.50%
Closing month	December
KTDS Co., Ltd. [member]
Disclosure of subsidiaries [line items]
Subsidiary	KTDS Co., Ltd.	KTDS Co., Ltd.	KTDS Co., Ltd.
Type of Business	System integration and maintenance
Location	Korea
Controlling percentage ownership	91.60%	95.60%
Closing month	December
Total assets	₩ 393,667	₩ 401,932	₩ 341,358
Total liabilities	202,067	228,474	199,831
Operating revenues	727,477	723,161	632,899
Profit (loss) for the year	₩ 33,971	₩ 30,941	₩ 21,464
KT M&S Co., Ltd. [member]
Disclosure of subsidiaries [line items]
Subsidiary	KT M&S Co., Ltd.	KT M&S Co., Ltd.	KT M&S Co., Ltd.
Type of Business	PCS distribution
Location	Korea
Controlling percentage ownership	100.00%	100.00%
Closing month	December
Total assets	₩ 258,477	₩ 255,310	₩ 241,377
Total liabilities	209,075	204,336	203,051
Operating revenues	695,856	730,802	710,634
Profit (loss) for the year	₩ 3,783	₩ 8,105	₩ 3,496
GENIE Music Corporation [Member]
Disclosure of subsidiaries [line items]
Subsidiary	GENIE Music Corporation
Type of Business	Online music production and distribution
Location	Korea
Controlling percentage ownership	36.00%	36.00%
Closing month	December
KT MOS Bukbu Co.,Ltd. [member]
Disclosure of subsidiaries [line items]
Subsidiary	KT MOS Bukbu Co., Ltd.	KT MOS Bukbu Co., Ltd.	KT MOS Bukbu Co., Ltd.
Type of Business	Telecommunication facility maintenance
Location	Korea
Controlling percentage ownership	100.00%	100.00%
Closing month	December
Total assets	₩ 50,750	₩ 38,684	₩ 32,511
Total liabilities	28,431	22,553	25,402
Operating revenues	101,428	83,085	70,212
Profit (loss) for the year	₩ 8,457	₩ 4,607	₩ 1,637
KT MOS Nambu Co., Ltd [member]
Disclosure of subsidiaries [line items]
Subsidiary	KT MOS Nambu Co., Ltd.	KT MOS Nambu Co., Ltd.	KT MOS Nambu Co., Ltd.
Type of Business	Telecommunication facility maintenance
Location	Korea
Controlling percentage ownership	98.40%	98.40%
Closing month	December
Total assets	₩ 46,839	₩ 42,011	₩ 36,741
Total liabilities	26,012	25,416	26,053
Operating revenues	101,422	83,330	71,940
Profit (loss) for the year	₩ 5,749	₩ 5,035	₩ 2,016
KT Skylife Co Ltd [member]
Disclosure of subsidiaries [line items]
Subsidiary	KT Skylife Co., Ltd.	KT Skylife Co., Ltd.	KT Skylife Co., Ltd.
Total assets	₩ 1,220,842	₩ 1,359,166	₩ 1,275,645
Total liabilities	479,369	503,679	469,694
Operating revenues	1,034,342	1,038,468	772,950
Profit (loss) for the year	₩ (109,407)	₩ 20,941	₩ 62,309
KT Skylife [Member]
Disclosure of subsidiaries [line items]
Subsidiary	KT Skylife
Type of Business	Satellite TV
Location	Korea
Controlling percentage ownership	50.60%	50.20%
Closing month	December
Skylife TV Co., Ltd. [Member]
Disclosure of subsidiaries [line items]
Subsidiary	Skylife TV Co., Ltd.
Type of Business	TV contents provider
Location	Korea
Controlling percentage ownership	100.00%	100.00%
Closing month	December
KT Estate Inc. [member]
Disclosure of subsidiaries [line items]
Subsidiary	KT Estate Inc.	KT Estate Inc.	KT Estate Inc.
Type of Business	Residential building development and supply
Location	Korea
Controlling percentage ownership	100.00%	100.00%
Closing month	December
Total assets	₩ 2,746,546	₩ 2,480,333	₩ 2,370,940
Total liabilities	1,121,970	833,842	791,884
Operating revenues	511,018	478,188	577,578
Profit (loss) for the year	₩ 871	₩ 58,780	₩ 213,203
KT Investment Management Inc. [Member]
Disclosure of subsidiaries [line items]
Subsidiary	KT Investment Management Inc.
Type of Business	Asset management, real estate and consulting services
Location	Korea
Controlling percentage ownership	100.00%	100.00%
Closing month	December
NEXR Co., Ltd. [Member]
Disclosure of subsidiaries [line items]
Subsidiary	NEXR Co., Ltd.
Type of Business	Cloud system implementation
Location	Korea
Controlling percentage ownership	100.00%	100.00%
Closing month	December
KTGDH Co., Ltd. [Member]
Disclosure of subsidiaries [line items]
Subsidiary	KTGDH Co., Ltd.	KTGDH Co., Ltd.	KTGDH Co., Ltd.
Type of Business	Data center development and related service
Location	Korea
Controlling percentage ownership	100.00%	100.00%
Closing month	December
Total assets	₩ 7,760	₩ 12,059	₩ 11,464
Total liabilities	1,501	1,596	1,560
Operating revenues	4,346	4,323	4,423
Profit (loss) for the year	₩ 648	₩ 451	₩ 553
KT Sat Co., Ltd. [Member]
Disclosure of subsidiaries [line items]
Subsidiary	KT Sat Co., Ltd.	KT Sat Co., Ltd.
Type of Business	Satellite communication business
Location	Korea
Controlling percentage ownership	100.00%	100.00%
Closing month	December
Total assets	₩ 699,607	₩ 677,980
Total liabilities	88,524	89,644
Operating revenues	182,274	185,313
Profit (loss) for the year	₩ 30,502	₩ 28,073
Nasmedia, Co., Ltd. [Member]
Disclosure of subsidiaries [line items]
Subsidiary	Nasmedia Co., Ltd.	Nasmedia Co., Ltd.	Nasmedia Co., Ltd.
Type of Business	Solution provider and IPTV advertisement sales business
Location	Korea
Controlling percentage ownership	44.10%	44.00%
Closing month	December
Total assets	₩ 513,311	₩ 516,945	₩ 490,394
Total liabilities	262,336	275,730	268,618
Operating revenues	147,934	153,210	125,876
Profit (loss) for the year	₩ 17,703	₩ 27,691	₩ 27,120
KT Sports Co., Ltd. [Member]
Disclosure of subsidiaries [line items]
Subsidiary	KT Sports Co., Ltd.	KT Sports Co., Ltd.
Type of Business	Management of sports teams
Location	Korea
Controlling percentage ownership	100.00%	100.00%
Closing month	December
Total assets	₩ 26,615	₩ 28,220
Total liabilities	11,299	15,461
Operating revenues	66,309	65,350
Profit (loss) for the year	₩ (12,386)	₩ (7,302)
KT Music Contents Fund No.2 [member]
Disclosure of subsidiaries [line items]
Subsidiary	KT Music Contents Fund No.2	KT Music Contents Fund No.2	KT Music Contents Fund No.2
Type of Business	Music and contents investment business
Location	Korea
Controlling percentage ownership	100.00%	100.00%
Closing month	December
Total assets	₩ 5,558	₩ 15,718	₩ 14,985
Total liabilities	1,772	277	278
Operating revenues	534	1,040	253
Profit (loss) for the year	₩ (992)	₩ 735	₩ (30)
KT-Michigan global contents fund [member]
Disclosure of subsidiaries [line items]
Subsidiary		KT-Michigan Global Content Fund	KT-Michigan Global Contents Fund
Total assets		₩ 2,371	₩ 3,552
Total liabilities		27	112
Operating revenues		33	13,592
Profit (loss) for the year		₩ (1,095)	₩ 10,032
KTCS Corporation [member]
Disclosure of subsidiaries [line items]
Subsidiary	KTCS Corporation	KTCS Corporation	KTCS Corporation
Type of Business	Database and online information provider
Location	Korea
Controlling percentage ownership	34.10%	34.10%
Closing month	December
Total assets	₩ 434,900	₩ 419,726	₩ 416,750
Total liabilities	234,850	228,618	234,172
Operating revenues	1,035,911	1,031,010	968,499
Profit (loss) for the year	₩ 15,804	₩ 17,634	₩ 19,034
KTIS Corporation [member]
Disclosure of subsidiaries [line items]
Subsidiary	KTIS Corporation	KTIS Corporation	KTIS Corporation
Type of Business	Database and online information provider
Location	Korea
Controlling percentage ownership	33.30%	33.30%
Closing month	December
Total assets	₩ 447,609	₩ 396,208	₩ 369,361
Total liabilities	243,519	199,204	177,619
Operating revenues	593,162	536,229	487,801
Profit (loss) for the year	₩ 13,922	₩ 15,917	₩ 24,944
KT M Mobile Co., Ltd. [Member]
Disclosure of subsidiaries [line items]
Subsidiary	KT M Mobile Co., Ltd.	KT M Mobile Co., Ltd.
Type of Business	Special category telecommunications operator and sales of communication device
Location	Korea
Controlling percentage ownership	100.00%	100.00%
Closing month	December
Total assets	₩ 176,838	₩ 152,114
Total liabilities	69,317	49,816
Operating revenues	301,049	262,918
Profit (loss) for the year	₩ 5,605	₩ 4,731
Next Connect PFV Inc. [member]
Disclosure of subsidiaries [line items]
Subsidiary	Next Connect PFV		Next Connect PFV Inc.
Total assets	₩ 946,687		₩ 518,441
Total liabilities	629,809		167,963
Operating revenues	0		0
Profit (loss) for the year	₩ (29,889)		₩ (6,519)
KT Investment Co., Ltd. [member]
Disclosure of subsidiaries [line items]
Subsidiary	KT Investment Co., Ltd.	KT Investment Co., Ltd.	KT Investment Co., Ltd.
Type of Business	Financing business for new technology
Location	Korea
Controlling percentage ownership	100.00%	100.00%
Closing month	December
Total assets	₩ 83,638	₩ 103,354	₩ 87,366
Total liabilities	57,420	79,182	66,108
Operating revenues	24,976	15,136	21,040
Profit (loss) for the year	₩ 2,180	₩ 2,840	₩ (697)
PlayD Co., Ltd. [Member]
Disclosure of subsidiaries [line items]
Subsidiary	PlayD Co., Ltd.
Type of Business	Advertising agency
Location	Korea
Controlling percentage ownership	70.40%	70.40%
Closing month	December
KT Rwanda Networks Ltd. [member]
Disclosure of subsidiaries [line items]
Subsidiary	KT Rwanda Networks Ltd.	KT Rwanda Networks Ltd.	KT Rwanda Networks Ltd.
Type of Business	Network installation and management
Location	Rwanda
Controlling percentage ownership	51.00%	51.00%
Closing month	December
Total assets	₩ 134,847	₩ 126,721	₩ 125,860
Total liabilities	313,787	267,369	236,389
Operating revenues	26,788	30,834	23,328
Profit (loss) for the year	₩ (57,628)	₩ (27,467)	₩ (28,770)
AOS Ltd. [member]
Disclosure of subsidiaries [line items]
Subsidiary	AOS Ltd.	AOS Ltd.	AOS Ltd.
Type of Business	System integration and maintenance
Location	Rwanda
Controlling percentage ownership	51.00%	51.00%
Closing month	December
Total assets	₩ 10,763	₩ 10,972	₩ 11,539
Total liabilities	1,983	905	2,812
Operating revenues	8,287	8,049	6,942
Profit (loss) for the year	₩ 128	₩ 1,274	₩ 823
KT Japan Co., Ltd. [member]
Disclosure of subsidiaries [line items]
Subsidiary	KT Japan Co., Ltd.	KT Japan Co., Ltd.	KT Japan Co., Ltd.
Type of Business	Foreign investment business and local counter work
Location	Japan
Controlling percentage ownership	100.00%	100.00%
Closing month	December
Total assets	₩ 2,015	₩ 1,888	₩ 1,474
Total liabilities	3,341	3,141	2,633
Operating revenues	2,793	3,263	1,298
Profit (loss) for the year	₩ (110)	₩ 226	₩ (142)
East Telecom LLC [member]
Disclosure of subsidiaries [line items]
Subsidiary	East Telecom LLC	East Telecom LLC	East Telecom LLC
Type of Business	Wireless/fixed line internet business
Location	Uzbekistan
Controlling percentage ownership	91.60%	91.60%
Closing month	December
Total assets	₩ 48,483	₩ 42,691	₩ 35,904
Total liabilities	22,632	21,645	22,088
Operating revenues	30,350	27,030	11,960
Profit (loss) for the year	₩ 7,723	₩ 6,419	₩ 2,487
KT America, Inc. [Member]
Disclosure of subsidiaries [line items]
Subsidiary	KT America, Inc.	KT America, Inc.	KT America, Inc.
Type of Business	Foreign investment business and local counter work
Location	USA
Controlling percentage ownership	100.00%	100.00%
Closing month	December
Total assets	₩ 6,013	₩ 5,945	₩ 4,884
Total liabilities	701	843	101
Operating revenues	8,928	8,070	6,508
Profit (loss) for the year	₩ 133	₩ 37	₩ 201
PT BC card Asia Pacific [member]
Disclosure of subsidiaries [line items]
Subsidiary	PT. BC Card Asia Pacific
Type of Business	Software development and supply
Location	Indonesia
Controlling percentage ownership	99.90%	99.90%
Closing month	December
KT Hong Kong Telecommunications Co., Ltd. [member]
Disclosure of subsidiaries [line items]
Subsidiary	KT Hong Kong Telecommunications Co., Ltd.	KT Hong Kong Telecommunications Co., Ltd.	KT Hong Kong Telecommunications Co., Ltd.
Type of Business	Fixed line telecommunication business
Location	Hong Kong
Controlling percentage ownership	100.00%	100.00%
Closing month	December
Total assets	₩ 11,142	₩ 10,505	₩ 6,613
Total liabilities	5,121	4,768	1,346
Operating revenues	19,373	20,413	18,825
Profit (loss) for the year	₩ 143	₩ 51	₩ 1,313
Korea Telecom Singapore Pte.Ltd. [member]
Disclosure of subsidiaries [line items]
Subsidiary	Korea Telecom Singapore Pte. Ltd.
Type of Business	Foreign investment business and local counter work
Location	Singapore
Controlling percentage ownership	100.00%	100.00%
Closing month	December
Texnoprosistem LLC [member]
Disclosure of subsidiaries [line items]
Subsidiary	Texnoprosistem LLC
Type of Business	Fixed line internet business
Location	Uzbekistan
Controlling percentage ownership	100.00%	100.00%
Closing month	December
Nasmedia Thailand Co Ltd [member]
Disclosure of subsidiaries [line items]
Subsidiary	Nasmedia Thailand Co., Ltd.
Type of Business	Internet advertising solution
Location	Thailand
Controlling percentage ownership	99.90%	99.90%
Closing month	December
KT Huimangjieum [Member]
Disclosure of subsidiaries [line items]
Subsidiary	KT Huimangjieum	KT Huimangjieum
Type of Business	Manufacturing
Location	Korea
Controlling percentage ownership	100.00%	100.00%
Closing month	December
Total assets	₩ 8,073	₩ 6,984
Total liabilities	2,715	2,582
Operating revenues	17,687	22,860
Profit (loss) for the year	₩ 1,012	₩ 494
K-REALTY RENTAL HOUSING REIT 3 [member]
Disclosure of subsidiaries [line items]
Subsidiary	K-REALTY RENTAL HOUSING REIT 3
Type of Business	Residential building
Location	Korea
Controlling percentage ownership	88.60%	88.60%
Closing month	December
Storywiz Co Ltd [Member]
Disclosure of subsidiaries [line items]
Subsidiary	Storywiz Co., Ltd.
Type of Business	Contents and software development and supply
Location	Korea
Controlling percentage ownership	100.00%	100.00%
Closing month	December
KT Engineering Co., Ltd. [Member]
Disclosure of subsidiaries [line items]
Subsidiary	KT Engineering Co., Ltd.
Type of Business	Telecommunication facility construction andmaintenance
Location	Korea
Controlling percentage ownership	100.00%	100.00%
Closing month	December
Total assets	₩ 160,243
Total liabilities	104,005
Operating revenues	262,063
Profit (loss) for the year	₩ 5,327
KT Studio Genie Co Ltd [Member]
Disclosure of subsidiaries [line items]
Subsidiary	KT Studio Genie Co., Ltd.	KT Studio Genie Co., Ltd.	KT Studio Genie Co., Ltd.
Type of Business	Data communication service and datacommunication construction business
Location	Korea
Controlling percentage ownership	90.90%	90.90%
Closing month	December
Total assets	₩ 989,187	₩ 987,270	₩ 648,534
Total liabilities	259,413	268,911	276,933
Operating revenues	542,955	723,580	90,047
Profit (loss) for the year	₩ 13,507	₩ 189,498	₩ (16,443)
KHS Corporation [Member]
Disclosure of subsidiaries [line items]
Subsidiary	KHS Corporation
Type of Business	Operation and maintenance of facilities
Location	Korea
Controlling percentage ownership	100.00%	100.00%
Closing month	December
Lolab Co Ltd [Member]
Disclosure of subsidiaries [line items]
Subsidiary	Lolab Co., Ltd.	Lolab Co., Ltd.	Lolab Co., Ltd.
Type of Business	Truck transportation and truckingarrangement business
Location	Korea
Controlling percentage ownership	79.80%	79.80%
Closing month	December
Total assets	₩ 42,744	₩ 35,091	₩ 26,726
Total liabilities	37,838	17,247	897
Operating revenues	173,035	74,881	2,107
Profit (loss) for the year	₩ (12,938)	₩ (7,985)	₩ (134)
HCN Co Ltd [Member]
Disclosure of subsidiaries [line items]
Subsidiary	HCN Co., Ltd.
Type of Business	Cable television service
Location	Korea
Controlling percentage ownership	100.00%	100.00%
Closing month	December
Millie Seojae [Member]
Disclosure of subsidiaries [line items]
Subsidiary	Millie Seojae
Type of Business	Book contents service
Location	Korea
Controlling percentage ownership	30.20%	38.60%
Closing month	December
KT ES Pte Ltd [Member]
Disclosure of subsidiaries [line items]
Subsidiary	KT ES Pte. Ltd.	KT ES Pte. Ltd.	KT ES Pte. Ltd.
Type of Business	Foreign investment business
Location	Singapore
Controlling percentage ownership	57.60%	57.60%
Closing month	December
Total assets	₩ 117,009	₩ 240,721	₩ 240,331
Total liabilities	90,392	88,640	80,597
Operating revenues	87,865	78,815	15,157
Profit (loss) for the year	₩ (124,850)	₩ (23,957)	₩ (6,355)
Epsilon Global Communications Pte. Ltd [Member]
Disclosure of subsidiaries [line items]
Subsidiary	Epsilon Global CommunicationsPTE. Ltd.
Type of Business	Network service industry
Location	Singapore
Controlling percentage ownership	100.00%	100.00%
Closing month	December
Epsilon Telecommunications (SP) Pte Ltd [Member]
Disclosure of subsidiaries [line items]
Subsidiary	Epsilon Telecommunications(SP) PTE. Ltd.
Type of Business	Fixed line telecommunication business
Location	Singapore
Controlling percentage ownership	100.00%	100.00%
Closing month	December
Epsilon Telecommunications US Pte Ltd [Member]
Disclosure of subsidiaries [line items]
Subsidiary	Epsilon Telecommunications(US) PTE. Ltd.
Type of Business	Fixed line telecommunication business
Location	Singapore
Controlling percentage ownership	100.00%	100.00%
Closing month	December
Epsilon Telecommunications Limited [Member]
Disclosure of subsidiaries [line items]
Subsidiary	Epsilon Telecommunications Limited
Type of Business	Fixed line telecommunication business
Location	UK
Controlling percentage ownership	100.00%	100.00%
Closing month	December
Epsilon Telecommunications HK Limited [Member]
Disclosure of subsidiaries [line items]
Subsidiary	Epsilon Telecommunications(HK) Limited
Type of Business	Fixed line telecommunication business
Location	Hong Kong
Controlling percentage ownership	100.00%	100.00%
Closing month	December
Epsilon US Inc [Member]
Disclosure of subsidiaries [line items]
Subsidiary	Epsilon US Inc.
Type of Business	Fixed line telecommunication business
Location	USA
Controlling percentage ownership	100.00%	100.00%
Closing month	December
Epsilon Telecommunications BG EOOD [Member]
Disclosure of subsidiaries [line items]
Subsidiary	Epsilon Telecommunications(BG) EOOD
Type of Business	Employee support service
Location	Bulgaria
Controlling percentage ownership	100.00%	100.00%
Closing month	December
KT Strategic Investment Fund 6 [Member]
Disclosure of subsidiaries [line items]
Subsidiary	KT Strategic Investment Fund 6
Type of Business	Investment fund
Location	Korea
Controlling percentage ownership	100.00%	100.00%
Closing month	December
Nasmedia KT Alpha Future Growth Strategic Investment Fund [Member]
Disclosure of subsidiaries [line items]
Subsidiary	Nasmedia-KT Alpha Future GrowthStrategic Investment Fund
Type of Business	Investment fund
Location	Korea
Controlling percentage ownership	100.00%	100.00%
Closing month	December
Altimedia Corporation [Member]
Disclosure of subsidiaries [line items]
Subsidiary	Altimedia Corporation	Altimedia Corporation	Altimedia Corporation
Type of Business	Software development and delivery
Location	Korea
Controlling percentage ownership	100.00%	100.00%
Closing month	December
Total assets	₩ 48,381	₩ 44,861	₩ 32,338
Total liabilities	12,374	15,777	9,742
Operating revenues	45,035	47,203	6,968
Profit (loss) for the year	₩ 7,352	₩ 6,035	₩ 1,037
Altimidia B.V. (formerly Alticast B.V.) [Member]
Disclosure of subsidiaries [line items]
Subsidiary	Altimidia B.V.(formerly Alticast B.V.)
Type of Business	Software development and delivery
Location	Netherlands
Controlling percentage ownership	100.00%	100.00%
Closing month	December
BCCARD VIETNAM LTD. [Member]
Disclosure of subsidiaries [line items]
Subsidiary	BCCARD VIETNAM LTD.
Type of Business	Software sales business
Location	Vietnam
Controlling percentage ownership	100.00%	100.00%
Closing month	December
Altimidia Vietnam (formerly Alticast Company Limited) [Member]
Disclosure of subsidiaries [line items]
Subsidiary	Altimidia Vietnam(formerly Alticast Company Limited)
Type of Business	Software development and delivery
Location	Vietnam
Controlling percentage ownership	100.00%	100.00%
Closing month	December
KT RUS LLC [Member]
Disclosure of subsidiaries [line items]
Subsidiary	KT RUS LLC	KT RUS LLC
Type of Business	Foreign investment business
Location	Russia
Controlling percentage ownership	100.00%	100.00%
Closing month	December
Total assets	₩ 501	₩ 967
Total liabilities	10	16
Operating revenues	1	5
Profit (loss) for the year	₩ (378)	₩ (871)
Hangang Real Estate Investment Trust No. 24 [Member]
Disclosure of subsidiaries [line items]
Subsidiary	Hangang Real Estate Investment Trust No. 24
Type of Business	Investment fund
Location	Korea
Controlling percentage ownership	75.00%	75.00%
Closing month	December
KTP SERVICES INC. [Member]
Disclosure of subsidiaries [line items]
Subsidiary	KTP SERVICES INC.	KTP SERVICES INC.
Type of Business	Fixed line telecommunication business
Location	Philippines
Controlling percentage ownership	100.00%	100.00%
Closing month	December
Total assets	₩ 2,967	₩ 3,832
Total liabilities	919	2,044
Operating revenues	671	776
Profit (loss) for the year	₩ 235	₩ (255)
KT Cloud Co., Ltd. [Member]
Disclosure of subsidiaries [line items]
Subsidiary	KT Cloud Co., Ltd.	kt cloud Co., Ltd.
Type of Business	Information and communications development
Location	Korea
Controlling percentage ownership	92.70%	100.00%
Closing month	December
Total assets	₩ 1,983,972	₩ 1,348,684
Total liabilities	503,241	245,872
Operating revenues	679,825	432,118
Profit (loss) for the year	₩ 63,956	₩ 14,712
KT DX Vietnam Company Limited [Member]
Disclosure of subsidiaries [line items]
Subsidiary	KT DX Vietnam Company Limited	KT DX Vietnam Company Limited
Type of Business	Software development
Location	Vietnam
Controlling percentage ownership	100.00%	100.00%
Closing month	December
Total assets	₩ 1,694	₩ 1,815
Total liabilities	102	6
Operating revenues	82	0
Profit (loss) for the year	₩ (207)	₩ 26
Pocheon Jeonggyori Development Co., Ltd. [Member]
Disclosure of subsidiaries [line items]
Subsidiary	Pocheon Jeonggyori Development Co., Ltd.
Type of Business	Residential building development
Location	Korea
Controlling percentage ownership	80.90%	80.90%
Closing month	December
PT CRANIUM ROYAL ADITAMA [Member]
Disclosure of subsidiaries [line items]
Subsidiary	PT CRANIUM ROYAL ADITAMA
Type of Business	Software development
Location	Indonesia
Controlling percentage ownership	67.00%	67.00%
Closing month	December
Juice Inc. [Member]
Disclosure of subsidiaries [line items]
Subsidiary	Juice Inc.
Type of Business	Online information provider/Software development and delivery
Location	Korea
Controlling percentage ownership	42.60%	41.20%
Closing month	December
open cloud lab Co., Ltd (formerly SPARK AND ASSOCIATES INC.) [Member]
Disclosure of subsidiaries [line items]
Subsidiary	open cloud lab Co., Ltd(formerly SPARK AND ASSOCIATES INC.)
Type of Business	IT consulting service and Telecommunication equipment sales
Location	Korea
Controlling percentage ownership	100.00%	100.00%
Closing month	December
KT Sports Inc [member]
Disclosure of subsidiaries [line items]
Subsidiary			KT Sports Inc.
Total assets			₩ 29,524
Total liabilities			19,740
Operating revenues			67,612
Profit (loss) for the year			₩ (2,039)
KT Sat Inc. [member]
Disclosure of subsidiaries [line items]
Subsidiary			KT Sat Inc.
Total assets			₩ 593,616
Total liabilities			34,169
Operating revenues			174,750
Profit (loss) for the year			₩ 20,830
KT Hopemate [member]
Disclosure of subsidiaries [line items]
Subsidiary			KT Hopemate
Total assets			₩ 6,311
Total liabilities			2,978
Operating revenues			12,538
Profit (loss) for the year			₩ 116
KT M mobile Inc. [member]
Disclosure of subsidiaries [line items]
Subsidiary			KT M Mobile Inc.
Total assets			₩ 144,175
Total liabilities			40,749
Operating revenues			204,641
Profit (loss) for the year			₩ 5,918
KT Engineering Co Ltd KT ENGCORE Co Ltd [Member]
Disclosure of subsidiaries [line items]
Subsidiary	KT Engineering Co., Ltd. (KT ENGCORE Co., Ltd.)		KT Engineering Co., Ltd. (KT ENGCORE Co., Ltd.)
Total assets		₩ 141,463	₩ 185,850
Total liabilities		89,853	144,832
Operating revenues		258,435	284,998
Profit (loss) for the year		₩ 10,302	₩ 366
KT Philippines [Member]
Disclosure of subsidiaries [line items]
Subsidiary			KT Philippines
Total assets			₩ 3,641
Total liabilities			1,243
Operating revenues			0
Profit (loss) for the year			₩ 0
Next Connect PFV [Member]
Disclosure of subsidiaries [line items]
Subsidiary	Next Connect PFV	Next Connect PFV
Type of Business	Residential building development and supply
Location	Korea
Controlling percentage ownership	100.00%	100.00%
Closing month	December
Total assets		₩ 624,734
Total liabilities		277,967
Operating revenues		3
Profit (loss) for the year		₩ (3,712)
KD Living, Inc. [Member]
Disclosure of subsidiaries [line items]
Subsidiary	KD Living, Inc
Type of Business	Residential building management
Location	Korea
Controlling percentage ownership	100.00%
Closing month	December
KT Healthcare Vina Co., Ltd. [Member]
Disclosure of subsidiaries [line items]
Subsidiary	KT Healthcare Vina Co., Ltd.
Type of Business	Medical service
Location	Vietnam
Controlling percentage ownership	100.00%
Closing month	December
Total assets	₩ 12,730
Total liabilities	439
Operating revenues	0
Profit (loss) for the year	₩ (721)
K-Realty Qualified Private Real Estate Investment Trust No. 1 [Member]
Disclosure of subsidiaries [line items]
Subsidiary	K-Realty Qualified Private Real Estate Investment Trust No. 1
Type of Business	Real estate management
Location	Korea
Controlling percentage ownership	6.50%
Closing month	December
Total assets	₩ 80,266
Total liabilities	50,693
Operating revenues	4,682
Profit (loss) for the year	₩ (1,037)
AQUA RETAIL VIETNAM COMPANY LIMITED [Member]
Disclosure of subsidiaries [line items]
Subsidiary	AQUA RETAIL VIETNAM COMPANY LIMITED
Type of Business	E-voucher issuance and trading business
Location	Vietnam
Controlling percentage ownership	100.00%
Closing month	December
Total assets	₩ 1,202
Total liabilities	62
Operating revenues	16
Profit (loss) for the year	₩ (248)
K-Realty Qualified Private Real Estate Investment Trust No. 4 [Member]
Disclosure of subsidiaries [line items]
Subsidiary	K-Realty Qualified Private Real Estate Investment Trust No. 4
Type of Business	Real estate management
Location	Korea
Controlling percentage ownership	93.90%
Closing month	December

XML

General Information - Summary of Consolidated Subsidiaries (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2023
Nasmedia, Co., Ltd. [Member]
Disclosure of subsidiaries [line items]
Base proportion of ownership interest in subsidiary	50.00%
KTCS Corporation [member]
Disclosure of subsidiaries [line items]
Base proportion of ownership interest in subsidiary	50.00%
KTIS Corporation [member]
Disclosure of subsidiaries [line items]
Base proportion of ownership interest in subsidiary	50.00%
Millie Seojae [Member]
Disclosure of subsidiaries [line items]
Base proportion of ownership interest in subsidiary	50.00%
GENIE Music Corporation [Member]
Disclosure of subsidiaries [line items]
Base proportion of ownership interest in subsidiary	50.00%
Juice Inc. [Member]
Disclosure of subsidiaries [line items]
Base proportion of ownership interest in subsidiary	50.00%
K-Realty Qualified Private Real Estate Investment Trust No. 1 [Member]
Disclosure of subsidiaries [line items]
Base proportion of ownership interest in subsidiary	50.00%

XML

Material Accounting Policies - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2023
Bottom of range [member]
Disclosure of significant accounting policies [line items]
Useful lives of investment property, excluding land depreciated cost model	5 years
Top of range [member]
Disclosure of significant accounting policies [line items]
Useful lives of investment property, excluding land depreciated cost model	40 years

XML

Material Accounting Policies - Summary of Estimated Useful Lives of Property, Plant and Equipment (Detail)	12 Months Ended
	Dec. 31, 2023
Buildings [member] | Bottom of range [member]
Disclosure of detailed information about property, plant and equipment [line items]
Estimated Useful Life	5 years
Buildings [member] | Top of range [member]
Disclosure of detailed information about property, plant and equipment [line items]
Estimated Useful Life	40 years
Structures [member] | Bottom of range [member]
Disclosure of detailed information about property, plant and equipment [line items]
Estimated Useful Life	5 years
Structures [member] | Top of range [member]
Disclosure of detailed information about property, plant and equipment [line items]
Estimated Useful Life	40 years
Machinery and equipment (Telecommunications equipment and others) [member] | Bottom of range [member]
Disclosure of detailed information about property, plant and equipment [line items]
Estimated Useful Life	2 years
Machinery and equipment (Telecommunications equipment and others) [member] | Top of range [member]
Disclosure of detailed information about property, plant and equipment [line items]
Estimated Useful Life	40 years
Vehicles [member] | Bottom of range [member]
Disclosure of detailed information about property, plant and equipment [line items]
Estimated Useful Life	4 years
Vehicles [member] | Top of range [member]
Disclosure of detailed information about property, plant and equipment [line items]
Estimated Useful Life	10 years
Tools [member] | Bottom of range [member]
Disclosure of detailed information about property, plant and equipment [line items]
Estimated Useful Life	2 years
Tools [member] | Top of range [member]
Disclosure of detailed information about property, plant and equipment [line items]
Estimated Useful Life	6 years
Office equipment [member] | Bottom of range [member]
Disclosure of detailed information about property, plant and equipment [line items]
Estimated Useful Life	2 years
Office equipment [member] | Top of range [member]
Disclosure of detailed information about property, plant and equipment [line items]
Estimated Useful Life	8 years

XML

Material Accounting Policies - Summary of Amortization of Intangible Assets With Limited Useful Life (Detail)	12 Months Ended
	Dec. 31, 2023
Development costs [member] | Bottom of range [member]
Disclosure of detailed information about intangible assets [line items]
Estimated Useful Life	3 years
Development costs [member] | Top of range [member]
Disclosure of detailed information about intangible assets [line items]
Estimated Useful Life	10 years
Software [member] | Bottom of range [member]
Disclosure of detailed information about intangible assets [line items]
Estimated Useful Life	3 years
Software [member] | Top of range [member]
Disclosure of detailed information about intangible assets [line items]
Estimated Useful Life	10 years
Frequency usage rights [member] | Bottom of range [member]
Disclosure of detailed information about intangible assets [line items]
Estimated Useful Life	5 years
Frequency usage rights [member] | Top of range [member]
Disclosure of detailed information about intangible assets [line items]
Estimated Useful Life	10 years
Others [member] | Bottom of range [member]
Disclosure of detailed information about intangible assets [line items]
Estimated Useful Life	1 year
Others [member] | Top of range [member]
Disclosure of detailed information about intangible assets [line items]
Estimated Useful Life	50 years

XML

Financial Instruments by Category - Summary of Financial Instruments by Category (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Disclosure of detailed information about financial instruments [line items]
Trade and other payables	₩ 8,317,822	₩ 8,397,264
Borrowings	10,218,165	10,006,685
Other financial liabilities	1,075,838	421,441
Lease liabilities	1,179,909	1,172,038
Cash and cash equivalents	2,879,554	2,449,062	₩ 3,019,592	₩ 2,634,624
Trade and other receivables	8,574,457	7,589,118
Other financial assets	4,164,961	3,823,936
Loans and receivables [member]
Disclosure of detailed information about financial instruments [line items]
Cash and cash equivalents	2,879,554	2,449,062
Trade and other receivables	8,458,259	7,459,994
Other financial assets	1,385,921	1,060,058
Financial assets at fair value through profit or loss [member]
Disclosure of detailed information about financial instruments [line items]
Other financial assets	939,661	1,064,856
Derivative used for hedge [member]
Disclosure of detailed information about financial instruments [line items]
Other financial liabilities	24,547	33,555
Other financial assets	159,211	190,830
Financial liabilities designated as at fair value through profit or loss [member]
Disclosure of detailed information about financial instruments [line items]
Other financial liabilities	136,106	141,280
Financial liabilities at amortized cost [member]
Disclosure of detailed information about financial instruments [line items]
Trade and other payables	8,317,822	8,397,264
Borrowings	10,218,165	10,006,685
Other financial liabilities	915,185	246,606
Financial assets at fair value through other comprehensive income [member]
Disclosure of detailed information about financial instruments [line items]
Trade and other receivables	116,198	129,124
Other financial assets	1,680,168	1,508,192
Others [member]
Disclosure of detailed information about financial instruments [line items]
Lease liabilities	₩ 1,179,909	₩ 1,172,038

XML

Financial Instruments by Category - Summary of Gains or Losses Arising From Financial Instruments by Category (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure of detailed information about financial instruments [line items]
Interest income	₩ 279,607	₩ 271,925	₩ 273,460
Interest expense	(356,345)	(293,854)	(263,389)
Total	(92,910)	(353,980)	215,095
Other comprehensive income (loss) for the year	7,447	(2,194)	165,567
Reclassified to profit or loss from other comprehensive income (loss) for the year	(37,942)	(95,421)
Interest expense	(52,035)	(41,469)	(36,651)
Financial liabilities designated as at fair value through profit or loss [member]
Disclosure of detailed information about financial instruments [line items]
Interest expense	(44)	(4,046)
Gain on foreign currency transaction	(5)	24	(2)
Gain (loss) on disposal	4,788		2,136
Gain (loss) on valuation	(7,394)	30,031	42,447
Derivatives used for hedging [member]
Disclosure of detailed information about financial instruments [line items]
Gain (loss) on transactions		(1,291)	(6,208)
Gain (loss) on valuation	11,503	(17,237)	(7,206)
Other comprehensive income (loss) for the year	7,557	(23,957)	(3,112)
Reclassified to profit or loss from other comprehensive income (loss) for the year	(8,764)	15,195	6,722
Financial liabilities at amortized cost [member]
Disclosure of detailed information about financial instruments [line items]
Interest expense	(358,486)	(275,302)	(232,197)
Gain on foreign currency transaction	(24,054)	(34,574)	(3,580)
Gain (loss) on foreign currency translation	(93,004)	(168,577)	(201,623)
Gain (loss) on valuation	3,411
Lease liabilities [member]
Disclosure of detailed information about financial instruments [line items]
Interest expense	(52,035)	(41,469)	(36,650)
Financial assets at amortized cost [member]
Disclosure of detailed information about financial instruments [line items]
Interest income	360,134	144,505	74,937
Gain on foreign currency transaction	22,782	23,824	12,826
Gain (loss) on foreign currency translation	5,741	(2,151)	2,911
Gain (loss) on disposal	(3,409)	(81)	35
Gain (loss) on valuation	(172,966)	(132,102)	(110,286)
Financial assets at fair value through profit or loss [member]
Disclosure of detailed information about financial instruments [line items]
Interest income	13,480	6,008	3,673
Dividend income	6,918	4,600	21,499
Gain on foreign currency transaction		1,100
Gain (loss) on foreign currency translation	3,396	13,711	17,794
Gain (loss) on disposal	14,237	2,347	29,974
Gain (loss) on valuation	(31,965)	(29,282)	64,659
Financial assets at fair value through other comprehensive income [member]
Disclosure of detailed information about financial instruments [line items]
Interest income	18,966	190,281	222,290
Dividend income	52,813	9,522	1,365
Gain (loss) on disposal	(11,193)	(62,183)	(22,712)
Gain (loss) on valuation		(61)
Other comprehensive income (loss) for the year	121,805	(158,574)	129,780
Derivatives financial assets for hedging [member]
Disclosure of detailed information about financial instruments [line items]
Gain (loss) on transactions	10,192	27,628
Gain (loss) on valuation	34,092	150,699	203,961
Other comprehensive income (loss) for the year	7,772	88,048	144,967
Reclassified to profit or loss from other comprehensive income (loss) for the year	₩ (29,178)	₩ (110,616)	₩ (143,305)

XML

Financial Instruments by Category - Summary of Gains or Losses Arising From Financial Instruments by Category (Parenthetical) (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure of detailed information about financial instruments [line items]
Interest income recognized as operating revenue	₩ 279,607	₩ 271,925	₩ 273,460
Interest expense recognized as operating expense	356,345	293,854	263,389
Profit and loss from foreign currency transaction	27,407	67,976	19,976
BC Card Co., Ltd. [member]
Disclosure of detailed information about financial instruments [line items]
Interest income recognized as operating revenue	112,973	68,869	27,440
Interest expense recognized as operating expense	55,677	27,060	5,458
Profit and loss from foreign currency transaction	5,597	3,569	2,373
Dividend income	1,759	2,299	1,340
Gain (loss) on valuation	11,112	7,860	₩ 15,459
Gain Loss On Valuation Of derivatives	48	₩ 418
KT Cloud Co., Ltd. [member]
Disclosure of detailed information about financial instruments [line items]
Gain on convertible preferred stock	₩ 311,312

XML

Cash and Cash Equivalents to Restricted Cash - Summary of Restricted Cash and Cash Equivalents (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022
Cash and cash equivalents [abstract]
Deposit restricted for governmental project and others	₩ 49,555	₩ 29,874

XML

Trade and Other Receivables - Summary of Trade and Other Receivables (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022
Disclosure of financial assets [line items]
Trade receivables	₩ 3,257,732	₩ 3,090,077
Other receivables	3,912,557	3,007,995
Trade and other receivables, net	7,170,289	6,098,072
Trade receivables	297,665	395,359
Other receivables	1,106,503	1,095,687
Total	1,404,168	1,491,046
Gross carrying amount [member]
Disclosure of financial assets [line items]
Trade receivables	3,596,899	3,439,542
Other receivables	3,990,900	3,092,261
Trade and other receivables, net	7,587,799	6,531,803
Trade receivables	318,429	408,098
Other receivables	1,227,929	1,249,096
Total	1,546,358	1,657,194
Accumulated depreciation, amortisation and impairment [member]
Disclosure of financial assets [line items]
Trade receivables	(330,002)	(342,539)
Other receivables	(76,089)	(82,243)
Trade and other receivables, net	(406,091)	(424,782)
Trade receivables	(1,288)	(1,199)
Other receivables	(107,547)	(136,300)
Total	(108,835)	(137,499)
Present value discount [member]
Disclosure of financial assets [line items]
Trade receivables	(9,165)	(6,926)
Other receivables	(2,254)	(2,023)
Trade and other receivables, net	(11,419)	(8,949)
Trade receivables	(19,476)	(11,540)
Other receivables	(13,879)	(17,109)
Total	₩ (33,355)	₩ (28,649)

XML

Trade and Other Receivables - Summary of Changes in Summary of Changes in Provision for Impairment (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure of financial assets [line items]
Acquisition and disposition of businesses	₩ (5,564)	₩ 8,587	₩ 5,128
Trade receivables [member]
Disclosure of financial assets [line items]
Beginning balance	343,738	349,725
Provision	69,972	64,522
Write-off/transfer	(69,246)	(69,430)
Acquisition and disposition of businesses	(310)	(43)
Others	(12,864)	(1,036)
Ending balance	331,290	343,738	349,725
Other receivables [member]
Disclosure of financial assets [line items]
Beginning balance	218,543	201,387
Provision	114,501	65,941
Reversal	(14,941)	(850)
Write-off/transfer	(129,108)	(49,904)
Acquisition and disposition of businesses	(17)
Others	(5,342)	1,969
Ending balance	₩ 183,636	₩ 218,543	₩ 201,387

XML

Trade and Other Receivables - Summary of Other Receivables (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure of financial assets [line items]
Receivables 1	₩ 8,574,457	₩ 7,589,118
Other receivables [member]
Disclosure of financial assets [line items]
Loans	51,854	98,953
Receivables 1	3,539,742	2,668,545
Accrued income	43,920	32,218
Refundable deposits	299,935	339,450
Loans receivable	1,067,005	1,013,428
Finance lease receivables	141,883	105,690
Others	58,357	63,941
Less: Provision for impairment	(183,636)	(218,543)	₩ (201,387)
Other receivables	₩ 5,019,060	₩ 4,103,682

XML

Trade and Other Receivables - Summary of Other Receivables (Parenthetical) (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022
BC Card Co., Ltd. [member]
Disclosure of financial assets [line items]
Settlement receivable included in other receivables	₩ 2,696,505	₩ 1,960,579

XML

Other Financial Assets and Liabilities - Summary of Other Financial Assets and Liabilities (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022
Other financial assets
Financial assets at amortized cost	₩ 1,385,921	₩ 1,060,058
Financial assets at fair value through profit or loss	939,661	1,064,856
Financial assets at fair value through other comprehensive income	1,680,168	1,508,192
Derivatives used for hedging	159,211	190,830
Less: Non-current	(2,724,761)	(2,501,484)
Current	1,440,200	1,322,452
Other financial liabilities
Financial liabilities at amortized cost	915,185	246,606
Financial liabilities at fair value through profit or loss	136,106	141,280
Derivatives used for hedging	24,547	33,555
Less: Non-current	(753,739)	(412,650)
Current Other financial assets	₩ 322,099	₩ 8,791

XML

Other Financial Assets and Liabilities - Summary of Other Financial Assets and Liabilities (Parenthetical) (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Korea software financial cooperative [member]
Disclosure of detailed information about financial instruments [line items]
Available-for-sale financial assets investment amount	₩ 9,016
Ustream Inc. [member]
Disclosure of detailed information about financial instruments [line items]
Proceeds from the disposal of Subsidiary	₩ 98,309	₩ 102,215

XML

Other Financial Assets and Liabilities - Summary of Financial Assets at Fair Value Through Profit or Loss (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022
Disclosure of financial assets [line items]
Equity Instruments	₩ 939,661	₩ 1,064,856
Less: non-current	(782,143)	(609,887)
Current	157,518	454,969
Equity Instruments Listed [member]
Disclosure of financial assets [line items]
Equity Instruments	13,911	26,647
Equity Instruments Unlisted [member]
Disclosure of financial assets [line items]
Equity Instruments	42,185	72,517
Debt securities [member]
Disclosure of financial assets [line items]
Equity Instruments	880,549	942,274
Derivatives held for trading [member]
Disclosure of financial assets [line items]
Equity Instruments	₩ 3,016	₩ 23,418

XML

Other Financial Assets and Liabilities - Summary of Financial Assets at Fair Value Through Profit or Loss (Parenthetical) (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022
Disclosure of financial assets [line items]
Derivative financial assets	₩ 159,211	₩ 190,830
Submarine Co Ltd [Member]
Disclosure of financial assets [line items]
Derivative financial assets	₩ 1,015

XML

Other Financial Assets and Liabilities - Additional Information (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure of detailed information about financial instruments [line items]
Ineffective portion recognized in profit or loss cash flow hedge valuation gain	₩ 41	₩ 2,707	₩ 11,825

XML

Other Financial Assets and Liabilities - Summary of Financial Assets at Fair Value Through Other Comprehensive Income (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022
Financial assets at fair value through other comprehensive income [line items]
Equity Instruments	₩ 1,680,168	₩ 1,508,192
Less: non-current	(1,680,168)	(1,508,192)
Current	0	0
Equity Instruments Listed [member]
Financial assets at fair value through other comprehensive income [line items]
Equity Instruments	1,231,188	1,006,476
Equity Instruments Unlisted [member]
Financial assets at fair value through other comprehensive income [line items]
Equity Instruments	443,067	496,284
Debt securities [member]
Financial assets at fair value through other comprehensive income [line items]
Equity Instruments	₩ 5,913	₩ 5,432

XML

Other Financial Assets and Liabilities - Summary of Derivative Financial Assets and Liabilities (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022
Disclosure of detailed information about financial instruments [line items]
Assets, Total	₩ 159,211	₩ 190,830
Less: Assets, non-current	(107,802)	(147,141)
Assets, Current	51,409	43,689
Liabilities, Total	24,547	33,555
Less: Liabilities, non-current	(23,696)	(33,555)
Liabilities, Current	851	0
Interest rate swap [member]
Disclosure of detailed information about financial instruments [line items]
Assets, Total	1,530	4,236
Liabilities, Total	191	0
Currency swap [member]
Disclosure of detailed information about financial instruments [line items]
Assets, Total	157,681	186,594
Liabilities, Total	₩ 24,356	₩ 33,555

XML

Other Financial Assets and Liabilities - Summary of Valuation Gains and Losses on Derivatives Contracts (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure of detailed information about financial instruments [line items]
Valuation gain	₩ 45,757	₩ 154,674	₩ 203,961
Valuation loss	162	21,213	7,206
Other comprehensive income	(30,218)	85,201	191,570
Interest rate swap [member]
Disclosure of detailed information about financial instruments [line items]
Valuation gain	48	63	0
Valuation loss	0	490	0
Other comprehensive income	(2,945)	4,666	1
Currency swap [member]
Disclosure of detailed information about financial instruments [line items]
Valuation gain	45,709	154,611	203,961
Valuation loss	162	20,723	7,206
Other comprehensive income	(27,273)	79,781	191,569
Currency forwards [member]
Disclosure of detailed information about financial instruments [line items]
Valuation gain	0	0	0
Valuation loss	0	0	0
Other comprehensive income	₩ 0	₩ 754	₩ 0

XML

Other Financial Assets and Liabilities - Summary of Hedged items (Detail) - Derivatives [member] - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Disclosure of detailed information about hedged items [line items]
Book value of hedged items	₩ 2,848,287	₩ 3,058,980
Changes in fair value to calculate the ineffective portion of hedges	(45,380)	(193,198)
Cash flow hedge reserves	(28,893)	(5,458)
USD
Disclosure of detailed information about hedged items [line items]
Book value of hedged items	2,593,707	2,675,885
Changes in fair value to calculate the ineffective portion of hedges	(44,365)	(170,010)
Cash flow hedge reserves	(30,415)	(13,947)
JPY
Disclosure of detailed information about hedged items [line items]
Book value of hedged items	3,651	3,813
Changes in fair value to calculate the ineffective portion of hedges	162	308
Cash flow hedge reserves	49	116
SGD
Disclosure of detailed information about hedged items [line items]
Book value of hedged items	0	267,843
Changes in fair value to calculate the ineffective portion of hedges	0	(18,720)
Cash flow hedge reserves	0	3,406
EUR
Disclosure of detailed information about hedged items [line items]
Book value of hedged items	10,985	10,404
Changes in fair value to calculate the ineffective portion of hedges	(581)	(121)
Cash flow hedge reserves	158	582
KRW
Disclosure of detailed information about hedged items [line items]
Book value of hedged items	239,944	101,035
Changes in fair value to calculate the ineffective portion of hedges	(596)	(4,655)
Cash flow hedge reserves	₩ 1,315	₩ 4,385

XML

Other Financial Assets and Liabilities - Summary of Hedging instruments (Detail) - Derivatives [member] - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Disclosure of detailed information about hedging instruments [line items]
Foreign currency	₩ 0
Contract amount	2,672,113	₩ 2,957,474
Assets	159,211	190,830
Liabilities	24,547	33,555
Changes in fair value to calculate the ineffective portion of hedges	45,339	195,905
USD
Disclosure of detailed information about hedging instruments [line items]
Foreign currency	2,011,509	2,111,509
Contract amount	2,417,473	2,527,626
Assets	157,681	160,243
Liabilities	23,465	32,936
Changes in fair value to calculate the ineffective portion of hedges	44,413	170,856
JPY
Disclosure of detailed information about hedging instruments [line items]
Foreign currency	400,000	400,000
Contract amount	4,357	4,357
Assets	0	0
Liabilities	660	409
Changes in fair value to calculate the ineffective portion of hedges	(162)	(308)
SGD
Disclosure of detailed information about hedging instruments [line items]
Foreign currency		284,000
Contract amount		245,208
Assets		26,351
Liabilities		0
Changes in fair value to calculate the ineffective portion of hedges		20,511
EUR
Disclosure of detailed information about hedging instruments [line items]
Foreign currency	7,700	7,700
Contract amount	10,283	10,283
Assets	0	0
Liabilities	231	210
Changes in fair value to calculate the ineffective portion of hedges	381	129
KRW
Disclosure of detailed information about hedging instruments [line items]
Foreign currency	0	0
Contract amount	240,000	170,000
Assets	1,530	4,236
Liabilities	191	0
Changes in fair value to calculate the ineffective portion of hedges	₩ 707	₩ 4,717

XML

Other Financial Assets and Liabilities - Summary of Financial Liabilities at Fair Value Through Profit or Loss (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022
Financial liabilities at fair value through profit or loss
Derivative liabilities held for trading	₩ 136,106	₩ 141,280

XML

Other Financial Assets and Liabilities - Summary of Financial Liabilities at Fair Value Through Profit or Loss (Parenthetical) (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022
Disclosure of financial liabilities [line items]
Derivative financial liabilities	₩ 24,547	₩ 33,555
K Bank Inc. [Member]
Disclosure of financial liabilities [line items]
Derivative financial liabilities	₩ 133,293	₩ 134,881

XML

Other Financial Assets and Liabilities - Summary of Valuation Gain and Loss on Financial Liabilities at Fair Value Through Profit or Loss (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure of financial liabilities [line items]
Derivative liabilities held for trading	₩ 136,106	₩ 141,280
Valuation gain on financial liabilities [member]
Disclosure of financial liabilities [line items]
Derivative liabilities held for trading	3,316	24,683	₩ 51,187
Valuation loss on financial liabilities [member]
Disclosure of financial liabilities [line items]
Derivative liabilities held for trading	₩ 10,710	₩ 1,800	₩ 8,741

XML

Inventories - Summary of Inventories Net (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022
Disclosure of inventories [line items]
Inventories	₩ 988,351	₩ 717,673
Merchandise [member]
Disclosure of inventories [line items]
Inventories	878,912	672,738
Others [member]
Disclosure of inventories [line items]
Inventories	109,439	44,935
Gross carrying amount [member]
Disclosure of inventories [line items]
Inventories	1,090,566	813,683
Gross carrying amount [member] | Merchandise [member]
Disclosure of inventories [line items]
Inventories	981,127	768,748
Gross carrying amount [member] | Others [member]
Disclosure of inventories [line items]
Inventories	109,439	44,935
Valuation allowance [member]
Disclosure of inventories [line items]
Inventories	(102,215)	(96,010)
Valuation allowance [member] | Merchandise [member]
Disclosure of inventories [line items]
Inventories	₩ (102,215)	₩ (96,010)

XML

Inventories - Additional Information (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Classes of current inventories [abstract]
Inventories recognised as expense	₩ 3,386,069	₩ 3,485,288	₩ 3,787,203
Valuation loss and reversal of valuation loss	₩ 6,205	₩ 24,294	₩ 12,920

XML

Other Assets and Liabilities - Summary of Other Assets and Liabilities (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022
Other assets
Advance payments	₩ 217,997	₩ 181,150
Prepaid expenses	146,628	107,775
Contract Cost	1,727,468	1,817,678
Contract assets	832,520	802,253
Others	15,237	12,964
Less: Non-current	(827,297)	(820,608)
Current	2,112,553	2,101,212
Other liabilities
Advances received	682,880	387,986
Withholdings	159,080	155,017
Unearned revenue	27,392	46,493
Lease liabilities	1,179,909	1,172,038
Contract liabilities	278,749	284,107
Others	30,848	33,108
Less: Non-current	(950,015)	(945,731)
Current	₩ 1,408,843	₩ 1,133,018

XML

Property and Equipment - Summary of Changes in Property and Equipment (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure of detailed information about property, plant and equipment [line items]
Beginning, net	₩ 14,772,179	₩ 14,464,886
Acquisition and capital expenditure	3,189,108	3,346,380
Disposal and termination	(81,119)	(92,123)
Depreciation	(2,720,283)	(2,640,187)
Impairment	(7,872)	(16,156)
Transfer in (out)	(159,872)	(62,802)
Transfer from (to) investment properties	(126,250)	(206,183)
Acquisition and disposition of businesses	5,564	(8,587)	₩ (5,128)
Others	624	(13,049)
Ending, net	14,872,079	14,772,179	14,464,886
Gross carrying amount [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning, net	50,580,188	48,995,516
Ending, net	52,056,203	50,580,188	48,995,516
Accumulated depreciation, amortisation and impairment [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning, net	(35,808,009)	(34,530,630)
Ending, net	(37,184,124)	(35,808,009)	(34,530,630)
Land [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning, net	1,272,808	1,315,797
Acquisition and capital expenditure	844	11,392
Disposal and termination	(3,651)	(2,556)
Transfer in (out)	58,790	24,647
Transfer from (to) investment properties	(37,725)	(63,278)
Acquisition and disposition of businesses	18,761	0
Others	14,549	(13,194)
Ending, net	1,324,376	1,272,808	1,315,797
Land [member] | Gross carrying amount [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning, net	1,272,940	1,315,929
Ending, net	1,324,508	1,272,940	1,315,929
Land [member] | Accumulated depreciation, amortisation and impairment [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning, net	(132)	(132)
Ending, net	(132)	(132)	(132)
Buildings and structures [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning, net	2,554,561	2,517,422
Acquisition and capital expenditure	5,072	32,030
Disposal and termination	(5,012)	(4,338)
Depreciation	(148,981)	(147,620)
Impairment	0	0
Transfer in (out)	151,157	230,955
Transfer from (to) investment properties	(88,336)	(140,229)
Acquisition and disposition of businesses	49,532	0
Others	137	66,341
Ending, net	2,518,130	2,554,561	2,517,422
Buildings and structures [member] | Gross carrying amount [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning, net	4,830,853	4,707,250
Ending, net	4,903,073	4,830,853	4,707,250
Buildings and structures [member] | Accumulated depreciation, amortisation and impairment [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning, net	(2,276,292)	(2,189,828)
Ending, net	(2,384,943)	(2,276,292)	(2,189,828)
Machinery and equipment1 [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning, net	9,613,829	9,316,571
Acquisition and capital expenditure	75,412	129,754
Disposal and termination	(70,418)	(76,608)
Depreciation	(2,495,402)	(2,413,191)
Impairment	(6,577)	(6,084)
Transfer in (out)	2,706,444	2,660,753
Acquisition and disposition of businesses	(14,981)	(4,386)
Others	(1,628)	7,020
Ending, net	9,806,679	9,613,829	9,316,571
Machinery and equipment1 [member] | Gross carrying amount [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning, net	42,091,573	40,270,005
Ending, net	43,611,280	42,091,573	40,270,005
Machinery and equipment1 [member] | Accumulated depreciation, amortisation and impairment [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning, net	(32,477,744)	(30,953,434)
Ending, net	(33,804,601)	(32,477,744)	(30,953,434)
Others [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning, net	223,436	221,238
Acquisition and capital expenditure	78,400	67,921
Disposal and termination	(1,711)	(4,695)
Depreciation	(75,900)	(79,376)
Impairment	(1)	(7,825)
Transfer in (out)	16,407	31,036
Acquisition and disposition of businesses	(44,543)	(481)
Others	(7,742)	(4,382)
Ending, net	188,346	223,436	221,238
Others [member] | Gross carrying amount [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning, net	1,276,779	1,607,853
Ending, net	1,182,144	1,276,779	1,607,853
Others [member] | Accumulated depreciation, amortisation and impairment [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning, net	(1,053,343)	(1,386,615)
Ending, net	(993,798)	(1,053,343)	(1,386,615)
Construction-in-progress [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning, net	1,107,545	1,093,858
Acquisition and capital expenditure	3,029,380	3,105,283
Disposal and termination	(327)	(3,926)
Impairment	(1,294)	(2,247)
Transfer in (out)	(3,092,670)	(3,010,193)
Transfer from (to) investment properties	(189)	(2,676)
Acquisition and disposition of businesses	(3,205)	(3,720)
Others	(4,692)	(68,834)
Ending, net	1,034,548	1,107,545	1,093,858
Construction-in-progress [member] | Gross carrying amount [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning, net	1,108,043	1,094,479
Ending, net	1,035,198	1,108,043	1,094,479
Construction-in-progress [member] | Accumulated depreciation, amortisation and impairment [member]
Disclosure of detailed information about property, plant and equipment [line items]
Beginning, net	(498)	(621)
Ending, net	₩ (650)	₩ (498)	₩ (621)

XML

Property and Equipment - Summary of the Details of Property and Equipment and Investment Properties Provided (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Disclosure of detailed information about property, plant and equipment [line items]
Related amount	₩ 10,218,165	₩ 10,006,685
Land and buildings [member] | Industrial Bank of Korea [member]
Disclosure of detailed information about property, plant and equipment [line items]
Carrying amount	81,057	13,899
Secured amount	₩ 64,680	₩ 19,100
Related line item	Borrowings	Borrowings
Related amount	₩ 54,900	₩ 6,000
Secured party	Industrial Bank of Korea, etc.	Industrial Bank of Korea, etc.
Land and buildings [member] | Lessee [Member]
Disclosure of detailed information about property, plant and equipment [line items]
Carrying amount	₩ 555,921	₩ 460,166
Secured amount	₩ 64,877	₩ 61,733
Related line item	Deposits	Deposits
Related amount	₩ 55,965	₩ 52,662
Secured party	Lessee	Lessee

XML

Property and Equipment - Additional Information (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure of detailed information about property, plant and equipment [line items]
Borrowing cost capitalized	₩ 17,671	₩ 9,954	₩ 5,360
Bottom of range [member]
Disclosure of detailed information about property, plant and equipment [line items]
Interest rate of capitalized borrowing cost	1.86%	1.85%	1.85%
Top of range [member]
Disclosure of detailed information about property, plant and equipment [line items]
Interest rate of capitalized borrowing cost	7.28%	7.42%	2.45%

XML

Investment Properties - Summary of Investment Properties (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Disclosure of detailed information about investment property [line items]
Beginning balance	₩ 1,933,358	₩ 1,720,654
Acquisition	210,808	87,398
Disposal and termination	(17,490)	(20,600)
Depreciation	(52,869)	(47,004)
Transfer from (to) property and equipment	126,250	206,183
Transfer and others	(1,922)	(13,273)
Ending balance	2,198,135	1,933,358
Gross carrying amount [member]
Disclosure of detailed information about investment property [line items]
Beginning balance	2,596,204	2,306,198
Ending balance	2,922,705	2,596,204
Accumulated depreciation and amortisation [member]
Disclosure of detailed information about investment property [line items]
Beginning balance	(662,846)	(585,544)
Ending balance	(724,570)	(662,846)
Land [member]
Disclosure of detailed information about investment property [line items]
Beginning balance	879,792	813,763
Acquisition	0	14,569
Disposal and termination	(8,167)	(14,725)
Transfer from (to) property and equipment	37,725	63,278
Transfer and others	1	2,907
Ending balance	909,351	879,792
Land [member] | Gross carrying amount [member]
Disclosure of detailed information about investment property [line items]
Beginning balance	881,360	815,331
Ending balance	910,919	881,360
Land [member] | Accumulated depreciation and amortisation [member]
Disclosure of detailed information about investment property [line items]
Beginning balance	(1,568)	(1,568)
Ending balance	(1,568)	(1,568)
Buildings [member]
Disclosure of detailed information about investment property [line items]
Beginning balance	916,458	840,090
Acquisition	57,529	17,351
Disposal and termination	(9,323)	(5,858)
Depreciation	(52,869)	(47,004)
Transfer from (to) property and equipment	88,336	140,229
Transfer and others	27,544	(28,350)
Ending balance	1,027,675	916,458
Buildings [member] | Gross carrying amount [member]
Disclosure of detailed information about investment property [line items]
Beginning balance	1,577,736	1,424,066
Ending balance	1,750,677	1,577,736
Buildings [member] | Accumulated depreciation and amortisation [member]
Disclosure of detailed information about investment property [line items]
Beginning balance	(661,278)	(583,976)
Ending balance	(723,002)	(661,278)
Investment property, construction-in-progress [Member]
Disclosure of detailed information about investment property [line items]
Beginning balance	137,108	66,801
Acquisition	153,279	55,478
Disposal and termination	0	(17)
Transfer from (to) property and equipment	189	2,676
Transfer and others	(29,467)	12,170
Ending balance	261,109	137,108
Investment property, construction-in-progress [Member] | Gross carrying amount [member]
Disclosure of detailed information about investment property [line items]
Beginning balance	137,108	66,801
Ending balance	₩ 261,109	₩ 137,108

XML

Investment Properties - Additional Information (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure of detailed information about investment property [line items]
Fair value of investment properties	₩ 5,276,169	₩ 5,370,047
Rental income from investment properties	224,016	₩ 206,127	₩ 185,877
Future minimum lease fee	251,262
Less than 1 year [member]
Disclosure of detailed information about investment property [line items]
Future minimum lease fee	101,738
1-5 years [member]
Disclosure of detailed information about investment property [line items]
Future minimum lease fee	130,707
More than 5 years [member]
Disclosure of detailed information about investment property [line items]
Future minimum lease fee	₩ 18,817

XML

Intangible Assets - Summary of Intangible Assets (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure of detailed information about intangible assets [line items]
Beginning, net	₩ 3,129,833	₩ 3,447,333
Acquisition and capital expenditure	309,737	346,989
Disposal and termination	(11,640)	(25,668)
Amortization	(691,909)	(627,261)	₩ (604,744)
Impairment	(236,207)	(30,674)
Acquisition and disposition of businesses	6,030	(10,266)
Others	28,017	29,380
Ending, net	2,533,861	3,129,833	3,447,333
Gross carrying amount [member]
Disclosure of detailed information about intangible assets [line items]
Beginning, net	8,148,293	7,942,556
Ending, net	8,163,459	8,148,293	7,942,556
Accumulated depreciation and amortisation [member]
Disclosure of detailed information about intangible assets [line items]
Beginning, net	(5,018,460)	(4,495,223)
Ending, net	(5,629,598)	(5,018,460)	(4,495,223)
Goodwill [member]
Disclosure of detailed information about intangible assets [line items]
Beginning, net	708,223	696,872
Acquisition and capital expenditure		19,455
Impairment	(230,352)	(24,006)
Acquisition and disposition of businesses	6,207	0
Others	4,349	15,902
Ending, net	488,427	708,223	696,872
Goodwill [member] | Gross carrying amount [member]
Disclosure of detailed information about intangible assets [line items]
Beginning, net	1,037,887	1,002,530
Ending, net	1,036,354	1,037,887	1,002,530
Goodwill [member] | Accumulated depreciation and amortisation [member]
Disclosure of detailed information about intangible assets [line items]
Beginning, net	(329,664)	(305,658)
Ending, net	(547,927)	(329,664)	(305,658)
Development costs [member]
Disclosure of detailed information about intangible assets [line items]
Beginning, net	171,856	228,373
Acquisition and capital expenditure	33,078	45,997
Disposal and termination	(4,812)	(5,503)
Amortization	(63,052)	(93,374)
Impairment	(128)	(744)
Acquisition and disposition of businesses		(2,320)
Others	1,658	(573)
Ending, net	138,600	171,856	228,373
Development costs [member] | Gross carrying amount [member]
Disclosure of detailed information about intangible assets [line items]
Beginning, net	1,803,687	1,812,377
Ending, net	1,790,446	1,803,687	1,812,377
Development costs [member] | Accumulated depreciation and amortisation [member]
Disclosure of detailed information about intangible assets [line items]
Beginning, net	(1,631,831)	(1,584,004)
Ending, net	(1,651,846)	(1,631,831)	(1,584,004)
Software [member]
Disclosure of detailed information about intangible assets [line items]
Beginning, net	155,076	139,425
Acquisition and capital expenditure	38,603	55,651
Disposal and termination	(397)	(48)
Amortization	(52,265)	(54,748)
Impairment	(16)	(508)
Acquisition and disposition of businesses	(108)	(802)
Others	11,769	16,106
Ending, net	152,662	155,076	139,425
Software [member] | Gross carrying amount [member]
Disclosure of detailed information about intangible assets [line items]
Beginning, net	1,156,951	1,083,426
Ending, net	1,196,329	1,156,951	1,083,426
Software [member] | Accumulated depreciation and amortisation [member]
Disclosure of detailed information about intangible assets [line items]
Beginning, net	(1,001,875)	(944,001)
Ending, net	(1,043,667)	(1,001,875)	(944,001)
Frequency usage rights [member]
Disclosure of detailed information about intangible assets [line items]
Beginning, net	1,488,256	1,839,131
Acquisition and capital expenditure	37
Amortization	(350,276)	(350,265)
Others	175	(610)
Ending, net	1,138,192	1,488,256	1,839,131
Frequency usage rights [member] | Gross carrying amount [member]
Disclosure of detailed information about intangible assets [line items]
Beginning, net	2,617,707	2,617,647
Ending, net	2,415,243	2,617,707	2,617,647
Frequency usage rights [member] | Accumulated depreciation and amortisation [member]
Disclosure of detailed information about intangible assets [line items]
Beginning, net	(1,129,451)	(778,516)
Ending, net	(1,277,051)	(1,129,451)	(778,516)
Others [member]
Disclosure of detailed information about intangible assets [line items]
Beginning, net	606,422	543,532
Acquisition and capital expenditure	238,019	225,886
Disposal and termination	(6,431)	(20,117)
Amortization	(226,316)	(128,874)
Impairment	(5,711)	(5,416)
Acquisition and disposition of businesses	(69)	(7,144)
Others	10,066	(1,445)
Ending, net	615,980	606,422	543,532
Others [member] | Gross carrying amount [member]
Disclosure of detailed information about intangible assets [line items]
Beginning, net	1,532,061	1,426,576
Ending, net	1,725,087	1,532,061	1,426,576
Others [member] | Accumulated depreciation and amortisation [member]
Disclosure of detailed information about intangible assets [line items]
Beginning, net	(925,639)	(883,044)
Ending, net	₩ (1,109,107)	₩ (925,639)	₩ (883,044)

XML

Intangible Assets - Summary of Intangible Assets (Parenthetical) (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Statement [Line Items]
Changed effect of useful life	₩ 52,179
Goodwill not subject to amortization	₩ 212,910	₩ 210,114

XML

Intangible Assets - Summary of Goodwill Allocated to Each Cash-Generation Unit (Detail) ₩ in Millions	Dec. 31, 2023 KRW (₩)
Disclosure of detailed information about intangible assets [line items]
Goodwill	₩ 488,427
Mobile services [member] | ICT [member]
Disclosure of detailed information about intangible assets [line items]
Goodwill	65,057
BC Card Co., Ltd. [member] | Finance [member]
Disclosure of detailed information about intangible assets [line items]
Goodwill	41,234
KT Telecop Co., Ltd. [member] | Others [member]
Disclosure of detailed information about intangible assets [line items]
Goodwill	15,418
KT MOS Bukbu Co Ltd and others [member] | Others [member]
Disclosure of detailed information about intangible assets [line items]
Goodwill	45,799
HCN Co Ltd [Member] | Satellite TV [member]
Disclosure of detailed information about intangible assets [line items]
Goodwill	130,242
MILLIE Co Ltd [Member] | Others [member]
Disclosure of detailed information about intangible assets [line items]
Goodwill	54,725
Epsilon Global Communications Pte Ltd [Member] | Others [member]
Disclosure of detailed information about intangible assets [line items]
Goodwill	45,670
GENIE Music Corporation [Member] | Others [member]
Disclosure of detailed information about intangible assets [line items]
Goodwill	50,214
PlayD Co., Ltd. [Member] | Others [member]
Disclosure of detailed information about intangible assets [line items]
Goodwill	₩ 40,068

XML

Intangible Assets - Summary of Goodwill Allocated to Each Cash-Generation Unit (Parenthetical) (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure of detailed information about intangible assets [line items]
Goodwill	₩ 488,427
Mobile services [member] | ICT [member]
Disclosure of detailed information about intangible assets [line items]
Terminal growth rate	0.00%
Discount rate	6.68%
Impairment loss on goodwill	₩ 0	₩ 0	₩ 0
Mobile services [member] | Bottom of range [member] | ICT [member]
Disclosure of detailed information about intangible assets [line items]
Expected revenue growth rate	0.56%
Mobile services [member] | Top of range [member] | ICT [member]
Disclosure of detailed information about intangible assets [line items]
Expected revenue growth rate	9.14%
Marketing [member] | Mobile services [member]
Disclosure of detailed information about intangible assets [line items]
Terminal growth rate	0.00%
Expected revenue growth rate	0.56%
Discount rate	6.68%
Impairment loss on goodwill	₩ 0	0	0
Finance [member] | BC Card Co., Ltd. [member]
Disclosure of detailed information about intangible assets [line items]
Terminal growth rate	0.00%
Expected revenue growth rate	0.04%
Discount rate	5.22%
Impairment loss on goodwill	₩ 0	0	0
Description of calculation of recoverable amount	The recoverable amounts of BC Card Co., Ltd. are calculated based on value-in use calculations. These calculations use discounted cash flow projections for the next five years based on financial budgets. A terminal growth rate of 0.0% was applied for the cash flows expected to be incurred after five years. This growth rate does not exceed the average growth rate of the industry which the cash-generating unit belongs in. The Group estimated its revenue growth rate 0.04% based on past performance and its expectation of future market changes. In addition, management estimated the cash flow based on past performance and its expectation of market growth, and the discount rates 5.22% used reflected specific risks relating to the relevant CGU. As a result of the impairment test, the Group concluded that the carrying amount of CGU does not exceed the recoverable amount. Accordingly, the Group did not recognize an impairment loss on goodwill on BC Card Co., Ltd. for the years ended December 31, 2021, 2022 and 2023.
Goodwill	₩ 41,234
Others [member] | BOOK CLUB MILLIE [Member]
Disclosure of detailed information about intangible assets [line items]
Terminal growth rate	1.00%
Expected revenue growth rate	9.96%
Discount rate	22.48%
Impairment loss on goodwill	₩ 0
Others [member] | MEDIA GENIE Co Ltd [Member]
Disclosure of detailed information about intangible assets [line items]
Terminal growth rate	1.00%
Expected revenue growth rate	10.57%
Discount rate	8.84%
Impairment loss on goodwill	₩ 45,670
Goodwill	₩ 118,609
Others [member] | KT Telecop Co., Ltd. [member]
Disclosure of detailed information about intangible assets [line items]
Terminal growth rate	1.00%
Expected revenue growth rate	3.54%
Discount rate	9.04%
Impairment loss on goodwill	₩ 0	₩ 0	₩ 0
Goodwill	₩ 15,418
Others [member] | GENIE Music Corporation [Member]
Disclosure of detailed information about intangible assets [line items]
Terminal growth rate	0.00%
Expected revenue growth rate	4.51%
Discount rate	16.73%
Impairment loss on goodwill	₩ 0
Description of calculation of recoverable amount	The recoverable amounts of GENIE Music Corporation are calculated based on value-in use calculations. These calculations use discounted cash flow projections for the next five years based on financial budgets. A terminal growth rate of 0.0% was applied for the cash flows expected to be incurred after five years. This growth rate does not exceed the average growth rate of the industry which the cash-generating unit belongs in. The Group estimated its revenue growth rate 4.51% based on past performance and its expectation of future market changes. In addition, management estimated the cash flow based on past performance and its expectation of market growth, and the discount rates 16.73% used reflected specific risks relating to the relevant CGU. As a result of the impairment test, the Group concluded that the carrying amount of CGU does not exceed the recoverable amount. Accordingly, the Group did not recognize an impairment loss on goodwill on GENIE Music Corporation for the years ended December 31, 2023.
Goodwill	₩ 50,214
Satellite TV [member] | HCN Co Ltd [Member]
Disclosure of detailed information about intangible assets [line items]
Terminal growth rate	0.00%
Expected revenue growth rate	2.21%
Discount rate	11.37%
Impairment loss on goodwill	₩ 130,242
Goodwill	₩ 98,432

XML

Investments in Associates and Joint Ventures - Summary of Details of Associates (Detail)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
KIF Investment Fund [Member]
Disclosure of associates [line items]
Percentage of ownership	33.33%	33.33%
Location	Korea	Korea
Date of financial statements	December	December
K Bank [member]
Disclosure of associates [line items]
Percentage of ownership	33.72%	33.72%
Location	Korea	Korea
Date of financial statements	December	December
Hyundai Robotics Co., Ltd. [member]
Disclosure of associates [line items]
Percentage of ownership	10.00%	10.00%
Location	Korea	Korea
Date of financial statements	December	December
Megazone Cloud Corporation [Member]
Disclosure of associates [line items]
Percentage of ownership	6.83%	6.83%
Location	Korea	Korea
Date of financial statements	December	December
IGIS No. 4681 General Private Real Estate Investment Company [Member]
Disclosure of associates [line items]
Percentage of ownership	44.64%	44.64%
Location	Korea	Korea
Date of financial statements	December	December
KT-DSC creative economy youth start-up investment fund [member]
Disclosure of associates [line items]
Percentage of ownership	28.57%	28.57%
Location	Korea	Korea
Date of financial statements	December	December
IGIS Professional Investors Private Investment Real Estate Investment LLC No.395 [Member]
Disclosure of associates [line items]
Percentage of ownership	35.29%	35.29%
Location	Korea	Korea
Date of financial statements	December	December
LS Marine Solution Co Ltd Formerly KT Submarine Co Ltd [Member]
Disclosure of associates [line items]
Percentage of ownership	7.30%	32.90%
Location	Korea	Korea
Date of financial statements	December	December

XML

Investments in Associates and Joint Ventures - Summary of Changes in Investments in Associates and Joint Ventures (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Disclosure Of Associates And Joint Ventures [Line Items]
Beginning	₩ 1,480,722	₩ 1,288,429
Acquisition (Disposal)	101,387	255,041
Share of net profit (loss) from associates and joint ventures	(35,634)	(16,821)
Others	10,414	(45,927)
Ending	1,556,889	1,480,722
KIF Investment Fund [Member]
Disclosure Of Associates And Joint Ventures [Line Items]
Beginning	170,979	178,935
Share of net profit (loss) from associates and joint ventures	5,443	2,502
Others	632	(10,458)
Ending	177,054	170,979
K Bank [member]
Disclosure Of Associates And Joint Ventures [Line Items]
Beginning	852,756	831,737
Acquisition (Disposal)	0
Share of net profit (loss) from associates and joint ventures	1,089	29,010
Others	19,036	(7,991)
Ending	872,881	852,756
Hyundai Robotics Co., Ltd. [member]
Disclosure Of Associates And Joint Ventures [Line Items]
Beginning	49,372	48,725
Acquisition (Disposal)	0
Share of net profit (loss) from associates and joint ventures	(1,637)	798
Others	(1)	(151)
Ending	47,734	49,372
Megazone Cloud Corporation [Member]
Disclosure Of Associates And Joint Ventures [Line Items]
Beginning	136,199
Acquisition (Disposal)		130,001
Share of net profit (loss) from associates and joint ventures	(4,583)	(22,555)
Others	78	28,753
Ending	131,694	136,199
IGIS No. 4681 General Private Real Estate Investment Company [Member]
Disclosure Of Associates And Joint Ventures [Line Items]
Beginning	23,589
Acquisition (Disposal)		25,000
Share of net profit (loss) from associates and joint ventures	(105)	(1,411)
Ending	23,484	23,589
KT-DSC creative economy youth start-up investment fund [member]
Disclosure Of Associates And Joint Ventures [Line Items]
Beginning	22,123	22,138
Acquisition (Disposal)	(500)
Share of net profit (loss) from associates and joint ventures	3,494	(13)
Others		(2)
Ending	25,117	22,123
IGIS Professional Investors Private Investment Real Estate Investment LLC No.395 [Member]
Disclosure Of Associates And Joint Ventures [Line Items]
Beginning	16,620	17,084
Share of net profit (loss) from associates and joint ventures	(4,678)	(464)
Ending	11,942	16,620
Others [member]
Disclosure Of Associates And Joint Ventures [Line Items]
Beginning	209,084
Acquisition (Disposal)	101,887
Share of net profit (loss) from associates and joint ventures	(34,912)
Others	(32,568)
Ending	243,491	209,084
Other associates and joint ventures [member]
Disclosure Of Associates And Joint Ventures [Line Items]
Beginning	209,084	189,810
Acquisition (Disposal)		100,040
Share of net profit (loss) from associates and joint ventures		(24,688)
Others		(56,078)
Ending		209,084
LS Marine Solution Co Ltd Formerly KT Submarine Co Ltd [Member]
Disclosure Of Associates And Joint Ventures [Line Items]
Beginning	0
Share of net profit (loss) from associates and joint ventures	255
Others	23,237
Ending	₩ 23,492	₩ 0

XML

Investments in Associates and Joint Ventures - Summary of Financial Information of Associates and Joint Ventures (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure Of Associates And Joint Ventures [Line Items]
Current assets	₩ 14,594,246	₩ 12,690,014
Non-current assets	28,197,401	28,299,796
Current liabilities	13,247,637	10,699,268
Non-current liabilities	11,001,436	11,877,846
Operating revenue	26,287,201	25,638,855	₩ 24,898,005
Profit (loss) for the year	972,182	1,385,635	1,459,395
Other comprehensive income(loss)	7,447	(2,194)	165,567
Total comprehensive income(loss)	979,629	1,383,441	₩ 1,624,962
K Bank Inc.[Member]
Disclosure Of Associates And Joint Ventures [Line Items]
Current assets	21,320,790	16,562,742
Non-current assets	89,812	71,265
Current liabilities	19,541,076	14,830,983
Non-current liabilities	4,516	2,168
Operating revenue	946,559	558,872
Profit (loss) for the year	10,560	86,498
Other comprehensive income(loss)	56,609	(24,888)
Total comprehensive income(loss)	67,169	61,610
Hyundai Robotics Co., Ltd. [member]
Disclosure Of Associates And Joint Ventures [Line Items]
Current assets	251,868	278,413
Non-current assets	134,424	135,380
Current liabilities	106,557	63,009
Non-current liabilities	9,775	64,335
Operating revenue	167,949	181,944
Profit (loss) for the year	(17,513)	9,332
Other comprehensive income(loss)	(1,093)	(49)
Total comprehensive income(loss)	(18,606)	9,283
KIF Investment Fund [Member]
Disclosure Of Associates And Joint Ventures [Line Items]
Current assets	128,344	98,132
Non-current assets	402,819	414,804
Operating revenue	33,017	19,916
Profit (loss) for the year	16,330	7,505
Other comprehensive income(loss)	0	(11,779)
Total comprehensive income(loss)	16,330	(4,274)
Dividends received from associates	1,139	6,531
Megazone Cloud Corporation [Member]
Disclosure Of Associates And Joint Ventures [Line Items]
Current assets	874,778	857,089
Non-current assets	267,605	202,767
Current liabilities	341,679	330,619
Non-current liabilities	205,087	94,202
Operating revenue	1,410,078	1,261,228
Profit (loss) for the year	(34,760)	(293,186)
Other comprehensive income(loss)	(3,021)	(6,609)
Total comprehensive income(loss)	(37,781)	(299,795)
IGIS No. 4681 General Private Real Estate Investment Company [Member]
Disclosure Of Associates And Joint Ventures [Line Items]
Current assets	2,985	52,851
Non-current assets	49,631
Current liabilities	11	12
Operating revenue	6	9
Profit (loss) for the year	(234)	(3,161)
Total comprehensive income(loss)	(234)	(3,161)
KT-DSC creative economy youth start-up investment fund [member]
Disclosure Of Associates And Joint Ventures [Line Items]
Current assets	482	908
Non-current assets	87,528	76,884
Current liabilities	101	362
Operating revenue	19,849	19,931
Profit (loss) for the year	12,227	(53)
Total comprehensive income(loss)	12,227	(53)
IGIS Professional Investors Private Investment Real Estate Investment LLC No.395 [Member]
Disclosure Of Associates And Joint Ventures [Line Items]
Current assets	5,690	9,344
Non-current assets	145,769	127,321
Current liabilities	107,553	90,545
Profit (loss) for the year	(406)	(474)
Total comprehensive income(loss)	(406)	₩ (474)
LS Marine Solution Co Ltd Formerly KT Submarine Co Ltd [Member]
Disclosure Of Associates And Joint Ventures [Line Items]
Current assets	66,767
Non-current assets	80,307
Current liabilities	23,906
Non-current liabilities	207
Operating revenue	70,779
Profit (loss) for the year	11,618
Other comprehensive income(loss)	(289)
Total comprehensive income(loss)	₩ 11,329

XML

Investments in Associates and Joint Ventures - Summary of Reconciliation of Carrying Amount of Interests in the Associates and Joint Ventures (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Disclosure Of Associates And Joint Ventures [Line Items]
Book amount	₩ 1,556,889	₩ 1,480,722
K Bank [member]
Disclosure Of Associates And Joint Ventures [Line Items]
Net assets	₩ 1,865,010	₩ 1,800,856
Percentage of ownership	33.72%	33.72%
Share in net assets	₩ 628,910	₩ 607,276
Intercompany transaction and others	243,971	245,480
Book amount	872,881	852,756
Hyundai Robotics Co., Ltd. [member]
Disclosure Of Associates And Joint Ventures [Line Items]
Net assets	₩ 269,960	₩ 286,449
Percentage of ownership	10.00%	10.00%
Share in net assets	₩ 26,996	₩ 28,645
Intercompany transaction and others	20,738	20,727
Book amount	47,734	49,372
KIF Investment Fund [Member]
Disclosure Of Associates And Joint Ventures [Line Items]
Net assets	₩ 531,164	₩ 512,936
Percentage of ownership	33.33%	33.33%
Share in net assets	₩ 177,054	₩ 170,979
Book amount	177,054	170,979
Megazone Cloud Corporation [Member]
Disclosure Of Associates And Joint Ventures [Line Items]
Net assets	₩ 547,786	₩ 635,035
Percentage of ownership	6.83%	6.83%
Share in net assets	₩ 37,404	₩ 43,360
Intercompany transaction and others	94,290	92,839
Book amount	131,694	136,199
IGIS No. 4681 General Private Real Estate Investment Company [Member]
Disclosure Of Associates And Joint Ventures [Line Items]
Net assets	₩ 52,605	₩ 52,839
Percentage of ownership	44.64%	44.64%
Share in net assets	₩ 23,484	₩ 23,589
Book amount	23,484	23,589
KT-DSC creative economy youth start-up investment fund [member]
Disclosure Of Associates And Joint Ventures [Line Items]
Net assets	₩ 87,908	₩ 77,430
Percentage of ownership	28.57%	28.57%
Share in net assets	₩ 25,117	₩ 22,123
Book amount	25,117	22,123
IGIS Professional Investors Private Investment Real Estate Investment LLC No.395 [Member]
Disclosure Of Associates And Joint Ventures [Line Items]
Net assets	₩ 43,905	₩ 46,120
Percentage of ownership	35.29%	35.29%
Share in net assets	₩ 15,496	₩ 16,278
Intercompany transaction and others	(3,554)	342
Book amount	11,942	₩ 16,620
LS Marine Solution Co Ltd Formerly KT Submarine Co Ltd [Member]
Disclosure Of Associates And Joint Ventures [Line Items]
Net assets	₩ 122,961
Percentage of ownership	7.30%	32.90%
Share in net assets	₩ 8,972
Intercompany transaction and others	14,520
Book amount	₩ 23,492

XML

Investments in Associates and Joint Ventures - Additional Information (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure of associates [abstract]
Loss from associates and joint ventures not recognized	₩ 833	₩ 909	₩ 717
Accumulated comprehensive loss of associates and joint ventures not recognized	₩ 10,748	₩ 9,915

XML

Trade and Other Payables - Summary of Trade and Other Payables (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022
Current liabilities
Trade payables	₩ 1,297,752	₩ 1,150,515
Other payables	6,757,170	6,182,650
Total	8,054,922	7,333,165
Non-current liabilities
Trade payables	3,202	0
Other payables	816,356	1,064,099
Total	₩ 819,558	₩ 1,064,099

XML

Trade and Other Payables - Summary of Other Payables (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022
Trade and other payables [abstract]
Non-trade payables	₩ 5,207,165	₩ 4,981,300
Accrued expenses	1,267,700	1,234,023
Operating deposits	880,810	818,603
Others	217,851	212,823
Less: non-current	(816,356)	(1,064,099)
Current	₩ 6,757,170	₩ 6,182,650

XML

Trade and Other Payables - Summary of Other Payables (Parenthetical) (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Trade and other payables [abstract]
Credit Sale Liabilities Settlement Payable	₩ 2,314,077	₩ 1,754,075

XML

Borrowings - Summary of Borrowings (Detail) ¥ in Thousands, $ in Thousands, $ in Thousands, ₩ in Millions	12 Months Ended
	Dec. 31, 2023 KRW (₩)	Dec. 31, 2023 USD ($)	Dec. 31, 2023 JPY (¥)	Dec. 31, 2022 KRW (₩)	Dec. 31, 2022 USD ($)	Dec. 31, 2022 JPY (¥)	Dec. 31, 2022 SGD ($)
Disclosure of detailed information about borrowings [line items]
Annual interest rates	0.00%	0.00%	0.00%
Less: Current portion	₩ (3,058,564)			₩ (1,827,042)
Borrowings	10,218,165			10,006,685
Gross carrying amount [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	₩ 10,236,958
Gross carrying amount [member] | Sept. 07, 2034 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Sep. 7, 2034
Annual interest rates	6.50%	6.50%	6.50%
Gross carrying amount [member] | July 18, 2026 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Jul. 18, 2026
Annual interest rates	2.50%	2.50%	2.50%
Gross carrying amount [member] | Aug 23, 2023 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Aug. 23, 2023
Gross carrying amount [member] | July 19, 2024 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Jul. 19, 2024
Annual interest rates	0.33%	0.33%	0.33%
Gross carrying amount [member] | Sept. 1, 2025 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Sep. 1. 2025
Annual interest rates	1.00%	1.00%	1.00%
Gross carrying amount [member] | Nov 01, 2024 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Nov. 1, 2024
Annual interest rates description	Compounded SOFR+1.210
Annual interest rates adjustment rate	1.21%	1.21%	1.21%
Gross carrying amount [member] | Jun. 19. 2023 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Jun. 19, 2023
Gross carrying amount [member] | Jan, 21, 2027 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Jan. 21, 2027
Annual interest rates	1.375%	1.375%	1.375%
Gross carrying amount [member] | Dec. 22, 2031 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Dec. 22, 2031
Annual interest rates	4.27%	4.27%	4.27%
Gross carrying amount [member] | Apr. 10, 2023 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Apr. 10, 2023
Gross carrying amount [member] | Apr. 10, 2033 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Apr. 10, 2033
Annual interest rates	3.17%	3.17%	3.17%
Gross carrying amount [member] | June 26, 2024 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Jun. 26, 2024
Annual interest rates	3.418%	3.418%	3.418%
Gross carrying amount [member] | June 26, 2034 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Jun. 26, 2034
Annual interest rates	3.695%	3.695%	3.695%
Gross carrying amount [member] | Sept. 02, 2024 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Sep. 2, 2024
Annual interest rates	3.314%	3.314%	3.314%
Gross carrying amount [member] | Sept. 02, 2034 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Sep. 2, 2034
Annual interest rates	3.546%	3.546%	3.546%
Gross carrying amount [member] | Jan. 29, 2025 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Jan. 29, 2025
Annual interest rates	2.454%	2.454%	2.454%
Gross carrying amount [member] | Jan. 29, 2035 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Jan. 29, 2035
Annual interest rates	2.706%	2.706%	2.706%
Gross carrying amount [member] | Jan. 28, 2026 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Jan. 28, 2026
Annual interest rates	2.203%	2.203%	2.203%
Gross carrying amount [member] | Jan. 28, 2036 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Jan. 28, 2036
Annual interest rates	2.351%	2.351%	2.351%
Gross carrying amount [member] | Jan. 30, 2023 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Jan. 30, 2023
Gross carrying amount [member] | Jan. 30, 2028 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Jan. 30, 2028
Annual interest rates	2.947%	2.947%	2.947%
Gross carrying amount [member] | Jan. 30, 2038 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Jan. 30, 2038
Annual interest rates	2.931%	2.931%	2.931%
Gross carrying amount [member] | Oct, 11, 2024 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Oct. 11, 2024
Annual interest rates	1.578%	1.578%	1.578%
Gross carrying amount [member] | Oct, 11, 2029 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Oct. 11, 2029
Annual interest rates	1.622%	1.622%	1.622%
Gross carrying amount [member] | Oct, 11, 2039 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Oct. 11, 2039
Annual interest rates	1.674%	1.674%	1.674%
Gross carrying amount [member] | June 16, 2023 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Jun. 16, 2023
Gross carrying amount [member] | June 17, 2025 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Jun. 17, 2025
Annual interest rates	1.434%	1.434%	1.434%
Gross carrying amount [member] | June 17, 2030 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Jun. 17, 2030
Annual interest rates	1.608%	1.608%	1.608%
Gross carrying amount [member] | June 15, 2040 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Jun. 15, 2040
Annual interest rates	1.713%	1.713%	1.713%
Gross carrying amount [member] | Jan, 26, 2024 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Jan. 26, 2024
Annual interest rates	1.127%	1.127%	1.127%
Gross carrying amount [member] | Jan, 27, 2026 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Jan. 27, 2026
Annual interest rates	1.452%	1.452%	1.452%
Gross carrying amount [member] | Jan, 27, 2031 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Jan. 27, 2031
Annual interest rates	1.849%	1.849%	1.849%
Gross carrying amount [member] | Jan, 25, 2041 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Jan. 25, 2041
Annual interest rates	1.976%	1.976%	1.976%
Gross carrying amount [member] | Jun. 10. 2024 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Jun. 10, 2024
Annual interest rates	1.387%	1.387%	1.387%
Gross carrying amount [member] | Jun. 10. 2026 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Jun. 10, 2026
Annual interest rates	1.806%	1.806%	1.806%
Gross carrying amount [member] | Jun. 10. 2031 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Jun. 10, 2031
Annual interest rates	2.168%	2.168%	2.168%
Gross carrying amount [member] | Jul. 02. 2024 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Jul. 2, 2024
Annual interest rates	1.844%	1.844%	1.844%
Gross carrying amount [member] | Jul. 02. 2026 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Jul. 2, 2026
Annual interest rates	2.224%	2.224%	2.224%
Gross carrying amount [member] | Jun. 23. 2023 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Jun. 23, 2023
Gross carrying amount [member] | Mar. 08. 2024 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Mar. 8, 2024
Annual interest rates	1.44%	1.44%	1.44%
Gross carrying amount [member] | Mar. 10. 2026 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Mar. 10, 2026
Annual interest rates	1.756%	1.756%	1.756%
Gross carrying amount [member] | Apr. 07. 2023 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Apr. 7, 2023
Gross carrying amount [member] | Apr. 08. 2024 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Apr. 8, 2024
Annual interest rates	1.462%	1.462%	1.462%
Gross carrying amount [member] | May 12. 2023 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	May 12, 2023
Gross carrying amount [member] | May 14. 2024 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	May 14, 2024
Annual interest rates	1.432%	1.432%	1.432%
Gross carrying amount [member] | Aug. 30. 2024 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Aug. 30, 2024
Annual interest rates	1.813%	1.813%	1.813%
Gross carrying amount [member] | Aug. 28. 2026 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Aug. 28, 2026
Annual interest rates	1.982%	1.982%	1.982%
Gross carrying amount [member] | Nov. 10. 2023 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Nov. 10, 2023
Gross carrying amount [member] | Nov. 11. 2024 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Nov. 11, 2024
Annual interest rates	2.425%	2.425%	2.425%
Gross carrying amount [member] | Jan. 23. 2025 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Jan. 23, 2025
Annual interest rates	2.511%	2.511%	2.511%
Gross carrying amount [member] | Aug. 08. 2025 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Aug. 08, 2025
Annual interest rates	4.00%	4.00%	4.00%
Gross carrying amount [member] | Jan. 15. 2024 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Jan. 15, 2024
Annual interest rates	2.088%	2.088%	2.088%
Gross carrying amount [member] | Jan. 15. 2029 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Jan. 15, 2029
Annual interest rates	2.16%	2.16%	2.16%
Gross carrying amount [member] | Jan. 14. 2039 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Jan. 14, 2039
Annual interest rates	2.213%	2.213%	2.213%
Gross carrying amount [member] | Jan. 27. 2025 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Jan. 27, 2025
Annual interest rates	2.596%	2.596%	2.596%
Gross carrying amount [member] | Jan. 27. 2027 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Jan. 27, 2027
Annual interest rates	2.637%	2.637%	2.637%
Gross carrying amount [member] | Jan. 27. 2032 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Jan. 27, 2032
Annual interest rates	2.741%	2.741%	2.741%
Gross carrying amount [member] | Jun. 27. 2025 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Jun. 27, 2025
Annual interest rates	4.191%	4.191%	4.191%
Gross carrying amount [member] | Jun. 29. 2027 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Jun. 29, 2027
Annual interest rates	4.188%	4.188%	4.188%
Gross carrying amount [member] | Jan. 10. 2025 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Jan. 10, 2025
Annual interest rates	3.847%	3.847%	3.847%
Gross carrying amount [member] | Jan. 12. 2026 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Jan. 12, 2026
Annual interest rates	3.869%	3.869%	3.869%
Gross carrying amount [member] | Jan. 12. 2028 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Jan. 12, 2028
Annual interest rates	3.971%	3.971%	3.971%
Gross carrying amount [member] | Jul. 11. 2025 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Jul. 11, 2025
Annual interest rates	4.028%	4.028%	4.028%
Gross carrying amount [member] | Jul. 10. 2026 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Jul. 10, 2026
Annual interest rates	4.146%	4.146%	4.146%
Gross carrying amount [member] | Jul. 12. 2028 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Jul. 12, 2028
Annual interest rates	4.221%	4.221%	4.221%
Gross carrying amount [member] | Feb. 29. 2024 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Feb. 29, 2024
Annual interest rates	2.615%	2.615%	2.615%
Gross carrying amount [member] | Sep. 2. 2024 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Sep. 2, 2024
Annual interest rates	2.745%	2.745%	2.745%
Gross carrying amount [member] | Feb. 28. 2025 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Feb. 28, 2025
Annual interest rates	2.88%	2.88%	2.88%
Gross carrying amount [member] | Mar. 25. 2025 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Mar. 25, 2025
Annual interest rates description	5Y CMS+0.404
Annual interest rates adjustment rate	0.404%	0.404%	0.404%
Gross carrying amount [member] | Mar. 25. 2032 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Mar. 25, 2032
Annual interest rates description	10Y CMS+0.965
Annual interest rates adjustment rate	0.965%	0.965%	0.965%
Gross carrying amount [member] | Apr. 28. 2023 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Apr. 28, 2023
Gross carrying amount [member] | oct. 27. 2023 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Oct. 27, 2023
Gross carrying amount [member] | Jan. 27. 2025 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Jan. 27, 2025
Annual interest rates	4.421%	4.421%	4.421%
Gross carrying amount [member] | Aug. 09. 2024 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Aug. 09, 2024
Annual interest rates	4.267%	4.267%	4.267%
Gross carrying amount [member] | Aug. 11. 2027 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Aug. 11, 2027
Annual interest rates	4.505%	4.505%	4.505%
Gross carrying amount [member] | Jun.14. 2024 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Jun. 14, 2024
Annual interest rates	5.615%	5.615%	5.615%
Gross carrying amount [member] | Dec. 13. 2024 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Dec. 13, 2024
Annual interest rates	5.667%	5.667%	5.667%
Gross carrying amount [member] | Dec. 12. 2025 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Dec. 12, 2025
Annual interest rates	5.769%	5.769%	5.769%
Gross carrying amount [member] | Jun. 21. 2024 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Jun. 21, 2024
Annual interest rates	5.527%	5.527%	5.527%
Gross carrying amount [member] | Dec. 20. 2024 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Dec. 20, 2024
Annual interest rates	5.557%	5.557%	5.557%
Gross carrying amount [member] | Jun. 20. 2025 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Jun. 20, 2025
Annual interest rates	5.594%	5.594%	5.594%
Gross carrying amount [member] | Dec. 22. 2025 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Dec. 22, 2025
Annual interest rates	5.615%	5.615%	5.615%
Gross carrying amount [member] | Dec. 27. 2023 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Dec. 27, 2023
Gross carrying amount [member] | Jan. 26. 2024 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Jan. 26, 2024
Annual interest rates	5.069%	5.069%	5.069%
Gross carrying amount [member] | Apr. 26. 2024 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Apr. 26, 2024
Annual interest rates	5.08%	5.08%	5.08%
Gross carrying amount [member] | Feb. 20. 2026 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Feb. 20, 2026
Annual interest rates	4.059%	4.059%	4.059%
Gross carrying amount [member] | Feb. 22. 2028 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Feb. 22, 2028
Annual interest rates	4.311%	4.311%	4.311%
Gross carrying amount [member] | Apr. 12. 2024 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Apr. 12, 2024
Annual interest rates	3.778%	3.778%	3.778%
Gross carrying amount [member] | Oct. 24. 2024 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Oct. 24, 2024
Annual interest rates	3.821%	3.821%	3.821%
Gross carrying amount [member] | Apr. 14. 2028 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Apr. 14, 2028
Annual interest rates	4.22%	4.22%	4.22%
Gross carrying amount [member] | May. 09. 2025 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	May. 09, 2025
Annual interest rates	3.87%	3.87%	3.87%
Gross carrying amount [member] | Nov. 09. 2026 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Nov. 09, 2026
Annual interest rates	3.932%	3.932%	3.932%
Gross carrying amount [member] | May. 07. 2027 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	May. 07, 2027
Annual interest rates	3.972%	3.972%	3.972%
Gross carrying amount [member] | Nov. 22. 2024 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Nov. 22. 2024
Annual interest rates	4.205%	4.205%	4.205%
Gross carrying amount [member] | Apr. 22. 2025 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Apr. 22. 2025
Annual interest rates	4.31%	4.31%	4.31%
Gross carrying amount [member] | May. 21. 2025 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	May. 21. 2025
Annual interest rates	4.332%	4.332%	4.332%
Gross carrying amount [member] | May. 22. 2025 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	May. 22. 2025
Annual interest rates	4.332%	4.332%	4.332%
Gross carrying amount [member] | Dec. 20. 2024 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Dec. 20. 2024
Annual interest rates	3.865%	3.865%	3.865%
Gross carrying amount [member] | Jan. 22. 2025 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Jan. 22. 2025
Annual interest rates	3.864%	3.864%	3.864%
Gross carrying amount [member] | Feb. 21. 2025 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Feb. 21. 2025
Annual interest rates	3.864%	3.864%	3.864%
Gross carrying amount [member] | Dec. 22. 2025 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Dec. 22. 2025
Annual interest rates	3.858%	3.858%	3.858%
Debentures [member]
Disclosure of detailed information about borrowings [line items]
Less: Current portion	₩ (1,924,523)			(1,154,101)
Discount on bonds	(19,248)			(23,728)
Borrowings	6,503,150			7,228,522
Debentures [member] | Gross carrying amount [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	8,446,921			8,406,351
Debentures [member] | Gross carrying amount [member] | Sept. 07, 2034 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	128,940	$ 100,000		126,730	$ 100,000
Debentures [member] | Gross carrying amount [member] | July 18, 2026 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	515,760	400,000		506,920	400,000
Debentures [member] | Gross carrying amount [member] | Aug 23, 2023 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings				126,730	100,000
Debentures [member] | Gross carrying amount [member] | July 19, 2024 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	3,651		¥ 400,000	3,813		¥ 400,000
Debentures [member] | Gross carrying amount [member] | Sept. 1, 2025 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	515,760	400,000		506,920	400,000
Debentures [member] | Gross carrying amount [member] | Nov 01, 2024 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	451,290	350,000		443,555	350,000
Debentures [member] | Gross carrying amount [member] | Jun. 19. 2023 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings				267,843			$ 284,000
Debentures [member] | Gross carrying amount [member] | Jan, 21, 2027 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	386,820	300,000		380,190	300,000
Debentures [member] | Gross carrying amount [member] | Dec. 22, 2031 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	160,000			160,000
Debentures [member] | Gross carrying amount [member] | Apr. 10, 2023 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings				190,000
Debentures [member] | Gross carrying amount [member] | Apr. 10, 2033 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	100,000			100,000
Debentures [member] | Gross carrying amount [member] | June 26, 2024 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	110,000			110,000
Debentures [member] | Gross carrying amount [member] | June 26, 2034 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	100,000			100,000
Debentures [member] | Gross carrying amount [member] | Sept. 02, 2024 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	170,000			170,000
Debentures [member] | Gross carrying amount [member] | Sept. 02, 2034 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	100,000			100,000
Debentures [member] | Gross carrying amount [member] | Jan. 29, 2025 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	240,000			240,000
Debentures [member] | Gross carrying amount [member] | Jan. 29, 2035 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	50,000			50,000
Debentures [member] | Gross carrying amount [member] | Jan. 28, 2026 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	100,000			100,000
Debentures [member] | Gross carrying amount [member] | Jan. 28, 2036 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	70,000			70,000
Debentures [member] | Gross carrying amount [member] | Jan. 30, 2023 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings				150,000
Debentures [member] | Gross carrying amount [member] | Jan. 30, 2028 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	170,000			170,000
Debentures [member] | Gross carrying amount [member] | Jan. 30, 2038 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	70,000			70,000
Debentures [member] | Gross carrying amount [member] | Oct, 11, 2024 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	100,000			100,000
Debentures [member] | Gross carrying amount [member] | Oct, 11, 2029 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	50,000			50,000
Debentures [member] | Gross carrying amount [member] | Oct, 11, 2039 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	110,000			110,000
Debentures [member] | Gross carrying amount [member] | June 16, 2023 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings				150,000
Debentures [member] | Gross carrying amount [member] | June 17, 2025 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	70,000			70,000
Debentures [member] | Gross carrying amount [member] | June 17, 2030 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	20,000			20,000
Debentures [member] | Gross carrying amount [member] | June 15, 2040 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	60,000			60,000
Debentures [member] | Gross carrying amount [member] | Jan, 26, 2024 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	130,000			130,000
Debentures [member] | Gross carrying amount [member] | Jan, 27, 2026 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	140,000			140,000
Debentures [member] | Gross carrying amount [member] | Jan, 27, 2031 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	50,000			50,000
Debentures [member] | Gross carrying amount [member] | Jan, 25, 2041 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	80,000			80,000
Debentures [member] | Gross carrying amount [member] | Jun. 10. 2024 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	180,000			180,000
Debentures [member] | Gross carrying amount [member] | Jun. 10. 2026 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	80,000			80,000
Debentures [member] | Gross carrying amount [member] | Jun. 10. 2031 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	40,000			40,000
Debentures [member] | Gross carrying amount [member] | Jul. 02. 2024 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	100,000			100,000
Debentures [member] | Gross carrying amount [member] | Jul. 02. 2026 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	50,000			50,000
Debentures [member] | Gross carrying amount [member] | Jun. 23. 2023 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings				100,000
Debentures [member] | Gross carrying amount [member] | Mar. 08. 2024 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	70,000			70,000
Debentures [member] | Gross carrying amount [member] | Mar. 10. 2026 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	30,000			30,000
Debentures [member] | Gross carrying amount [member] | Apr. 07. 2023 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings				20,000
Debentures [member] | Gross carrying amount [member] | Apr. 08. 2024 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	30,000			30,000
Debentures [member] | Gross carrying amount [member] | May 12. 2023 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings				10,000
Debentures [member] | Gross carrying amount [member] | May 14. 2024 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	40,000			40,000
Debentures [member] | Gross carrying amount [member] | Aug. 30. 2024 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	80,000			80,000
Debentures [member] | Gross carrying amount [member] | Aug. 28. 2026 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	20,000			20,000
Debentures [member] | Gross carrying amount [member] | Nov. 10. 2023 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings				30,000
Debentures [member] | Gross carrying amount [member] | Nov. 11. 2024 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	70,000			70,000
Debentures [member] | Gross carrying amount [member] | Jan. 23. 2025 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	40,000			40,000
Debentures [member] | Gross carrying amount [member] | Aug. 08. 2025 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	644,700	$ 500,000		633,650	$ 500,000
Debentures [member] | Gross carrying amount [member] | Jan. 15. 2024 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	80,000			80,000
Debentures [member] | Gross carrying amount [member] | Jan. 15. 2029 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	110,000			110,000
Debentures [member] | Gross carrying amount [member] | Jan. 14. 2039 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	90,000			90,000
Debentures [member] | Gross carrying amount [member] | Jan. 27. 2025 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	270,000			270,000
Debentures [member] | Gross carrying amount [member] | Jan. 27. 2027 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	100,000			100,000
Debentures [member] | Gross carrying amount [member] | Jan. 27. 2032 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	30,000			30,000
Debentures [member] | Gross carrying amount [member] | Jun. 27. 2025 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	280,000			280,000
Debentures [member] | Gross carrying amount [member] | Jun. 29. 2027 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	120,000			120,000
Debentures [member] | Gross carrying amount [member] | Jan. 10. 2025 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	70,000
Debentures [member] | Gross carrying amount [member] | Jan. 12. 2026 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	150,000
Debentures [member] | Gross carrying amount [member] | Jan. 12. 2028 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	80,000
Debentures [member] | Gross carrying amount [member] | Jul. 11. 2025 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	85,000
Debentures [member] | Gross carrying amount [member] | Jul. 10. 2026 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	160,000
Debentures [member] | Gross carrying amount [member] | Jul. 12. 2028 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	155,000
Debentures [member] | Gross carrying amount [member] | Feb. 29. 2024 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	50,000			50,000
Debentures [member] | Gross carrying amount [member] | Sep. 2. 2024 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	20,000			20,000
Debentures [member] | Gross carrying amount [member] | Feb. 28. 2025 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	20,000			20,000
Debentures [member] | Gross carrying amount [member] | Mar. 25. 2025 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	60,000			60,000
Debentures [member] | Gross carrying amount [member] | Mar. 25. 2032 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	40,000			40,000
Debentures [member] | Gross carrying amount [member] | Apr. 28. 2023 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings				30,000
Debentures [member] | Gross carrying amount [member] | oct. 27. 2023 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings				30,000
Debentures [member] | Gross carrying amount [member] | Jan. 27. 2025 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	50,000			50,000
Debentures [member] | Gross carrying amount [member] | Aug. 09. 2024 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	30,000			30,000
Debentures [member] | Gross carrying amount [member] | Aug. 11. 2027 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	30,000			30,000
Debentures [member] | Gross carrying amount [member] | Jun.14. 2024 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	20,000			20,000
Debentures [member] | Gross carrying amount [member] | Dec. 13. 2024 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	20,000			20,000
Debentures [member] | Gross carrying amount [member] | Dec. 12. 2025 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	30,000			30,000
Debentures [member] | Gross carrying amount [member] | Jun. 21. 2024 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	10,000			10,000
Debentures [member] | Gross carrying amount [member] | Dec. 20. 2024 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	20,000			20,000
Debentures [member] | Gross carrying amount [member] | Jun. 20. 2025 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	30,000			30,000
Debentures [member] | Gross carrying amount [member] | Dec. 22. 2025 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	10,000			10,000
Debentures [member] | Gross carrying amount [member] | Dec. 27. 2023 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings				50,000
Debentures [member] | Gross carrying amount [member] | Jan. 26. 2024 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	40,000			40,000
Debentures [member] | Gross carrying amount [member] | Apr. 26. 2024 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	10,000			₩ 10,000
Debentures [member] | Gross carrying amount [member] | Feb. 20. 2026 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	20,000
Debentures [member] | Gross carrying amount [member] | Feb. 22. 2028 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	80,000
Debentures [member] | Gross carrying amount [member] | Apr. 12. 2024 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	10,000
Debentures [member] | Gross carrying amount [member] | Oct. 24. 2024 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	30,000
Debentures [member] | Gross carrying amount [member] | Apr. 14. 2028 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	30,000
Debentures [member] | Gross carrying amount [member] | May. 09. 2025 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	30,000
Debentures [member] | Gross carrying amount [member] | Nov. 09. 2026 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	10,000
Debentures [member] | Gross carrying amount [member] | May. 07. 2027 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	30,000
Debentures [member] | Gross carrying amount [member] | Nov. 22. 2024 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	20,000
Debentures [member] | Gross carrying amount [member] | Apr. 22. 2025 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	40,000
Debentures [member] | Gross carrying amount [member] | May. 21. 2025 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	10,000
Debentures [member] | Gross carrying amount [member] | May. 22. 2025 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	40,000
Debentures [member] | Gross carrying amount [member] | Dec. 20. 2024 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	30,000
Debentures [member] | Gross carrying amount [member] | Jan. 22. 2025 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	50,000
Debentures [member] | Gross carrying amount [member] | Feb. 21. 2025 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	10,000
Debentures [member] | Gross carrying amount [member] | Dec. 22. 2025 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	₩ 10,000

XML

Borrowings - Summary of Borrowings (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2023
The 1561st Won Denominated Unsecured Bond March Twenty Five Twenty Twenty Five [member]
Disclosure of detailed information about borrowings [line items]
CMS rate	2.993%
The 1562nd Won Denominated Unsecured Bond March Twenty Five Twenty Thirty Two [member]
Disclosure of detailed information about borrowings [line items]
CMS rate	2.99%
Fr Notes November One Twenty Twenty Four [member]
Disclosure of detailed information about borrowings [line items]
Borrowings interest rate basis spread on SOFR rate	5.38%
Borrowings, interest rate basis	SOFR+1.210
Borrowings, adjustment to interest rate basis	1.21%

XML

Borrowings - Summary of Korean Won and Foreign Currency Borrowings (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Disclosure of detailed information about borrowings [line items]
Annual interest rates	0.00%
Borrowings	₩ 10,218,165	₩ 10,006,685
Redemption premium	2,267	4,565
Bond discount issuance	(1,811)	(7,206)
Current portion	(8,456)
The 1st CB(Private) Jun. 5, 2020 and The First Unsecured Cb Jul.25.2022 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	₩ 8,456	35,359
The 1st CB(Private) Jun. 5, 2025 [member] | The 1st CB(Private) Jun. 5, 2020 [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Jun. 5, 2025
Annual interest rates	2.00%
Borrowings	₩ 8,000	8,000
The First Unsecured Cb January Five Twenty Twenty Five [Member] | The First Unsecured Cb July Twenty Five Twenty Two [Member]
Disclosure of detailed information about borrowings [line items]
Maturity	Jan. 25, 2025
Borrowings		₩ 30,000

XML

Borrowings - Summary of Korean Won and Foreign Currency Borrowings (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2023 shares
Disclosure of detailed information about borrowings [line items]
Interest rate	0.00%
Maturity yield	5.00%
Storywiz Co Ltd [Member]
Disclosure of detailed information about borrowings [line items]
Appraisal period of common stock conversion to debt	(appraisal period: June 5, 2021~May 4, 2025)
KT Cloud [Member]
Disclosure of detailed information about borrowings [line items]
Conversion of bonds to common shares, shares	73,800
Conversion of bonds to preference shares, shares	73,800

XML

Borrowings - Summary of Short-term Borrowing (Detail) ₩ in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2023 KRW (₩)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 KRW (₩)	Dec. 31, 2022 USD ($)
Disclosure of detailed information about borrowings [line items]
Annual interest rates	0.00%	0.00%
Short-term borrowings [member]
Disclosure of detailed information about borrowings [line items]
Short-term borrowings	₩ 425,785	$ 504,998
Short-term borrowings [member] | NongHyup Bank [member]
Disclosure of detailed information about borrowings [line items]
Annual interest rates	4.88%	4.88%
Short-term borrowings	₩ 8,500		₩ 9,000
Short-term borrowings [member] | Shinhan Bank [member]
Disclosure of detailed information about borrowings [line items]
Short-term borrowings	₩ 151,500		105,000
Short-term borrowings [member] | Shinhan Bank [member] | Bottom of range [member]
Disclosure of detailed information about borrowings [line items]
Annual interest rates	3.84%	3.84%
Short-term borrowings [member] | Shinhan Bank [member] | Top of range [member]
Disclosure of detailed information about borrowings [line items]
Annual interest rates	6.43%	6.43%
Short-term borrowings [member] | Shinhan Bank 1 [Member]
Disclosure of detailed information about borrowings [line items]
Short-term borrowings			30,000
Short-term borrowings [member] | Korea Development Bank [member]
Disclosure of detailed information about borrowings [line items]
Short-term borrowings	₩ 34,900		27,201
Short-term borrowings [member] | Korea Development Bank [member] | Bottom of range [member]
Disclosure of detailed information about borrowings [line items]
Annual interest rates	3.23%	3.23%
Short-term borrowings [member] | Korea Development Bank [member] | Top of range [member]
Disclosure of detailed information about borrowings [line items]
Annual interest rates	4.95%	4.95%
Short-term borrowings [member] | Woori Bank [Member]
Disclosure of detailed information about borrowings [line items]
Short-term borrowings			50,000
Short-term borrowings [member] | Industrial Bank Of Korea [member]
Disclosure of detailed information about borrowings [line items]
Annual interest rates	4.862%	4.862%
Short-term borrowings	₩ 6,000		6,000
Short-term borrowings [member] | Hana Bank [Member]
Disclosure of detailed information about borrowings [line items]
Short-term borrowings	₩ 4,800		5,000
Annual interest rates description	CD(91D)+0.126
Short-term borrowings [member] | KB SECURITIES [Member]
Disclosure of detailed information about borrowings [line items]
Short-term borrowings	₩ 69,635		94,822
Short-term borrowings [member] | KB SECURITIES [Member] | Bottom of range [member]
Disclosure of detailed information about borrowings [line items]
Annual interest rates	4.11%	4.11%
Short-term borrowings [member] | KB SECURITIES [Member] | Top of range [member]
Disclosure of detailed information about borrowings [line items]
Annual interest rates	4.91%	4.91%
Short-term borrowings [member] | NH INVESTMENT SECURITIES [Member]
Disclosure of detailed information about borrowings [line items]
Short-term borrowings			20,000
Short-term borrowings [member] | HSBC [member]
Disclosure of detailed information about borrowings [line items]
Short-term borrowings	₩ 30,450	$ 23,600	23,451	$ 18,500
Annual interest rates description	SOFR +2.100
Short-term borrowings [member] | IBK Securities [Member]
Disclosure of detailed information about borrowings [line items]
Short-term borrowings			20,000
Short-term borrowings [member] | Hi Investment Securities [Member]
Disclosure of detailed information about borrowings [line items]
Short-term borrowings			99,524
Short-term borrowings [member] | Woori Bank One [Member]
Disclosure of detailed information about borrowings [line items]
Annual interest rates	4.40%	4.40%
Short-term borrowings	₩ 70,000
Short-term borrowings [member] | Nong Hyup Bank One [Member]
Disclosure of detailed information about borrowings [line items]
Short-term borrowings			₩ 15,000
Short-term borrowings [member] | Woori Bank Two [member]
Disclosure of detailed information about borrowings [line items]
Short-term borrowings	₩ 20,000
Annual interest rates description	CD(91D)+1.960
Short-term borrowings [member] | Korea Investment [member]
Disclosure of detailed information about borrowings [line items]
Annual interest rates	4.91%	4.91%
Short-term borrowings	₩ 30,000

XML

Borrowings - Summary of Short-term Borrowing (Parenthetical) (Detail)	Dec. 31, 2023
Hana Bank [Member]
Disclosure of detailed information about borrowings [line items]
LIBOR rate	3.82%
HSBC [member]
Disclosure of detailed information about borrowings [line items]
LIBOR rate	5.38%

XML

Borrowings - Summary of Long-term Borrowings (Detail) € in Millions, ₩ in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2023 KRW (₩)	Dec. 31, 2023 USD ($)	Dec. 31, 2023 EUR (€)	Dec. 31, 2022 KRW (₩)	Dec. 31, 2022 USD ($)	Dec. 31, 2022 EUR (€)
Disclosure of detailed information about borrowings [line items]
Annual interest rates	0.00%	0.00%	0.00%
Borrowings	₩ 10,218,165			₩ 10,006,685
Total	7,159,601			8,179,643
Long-term borrowings [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	1,356,251			1,083,705
Less: Current portion	(699,800)			(167,943)
Total	₩ 656,451			915,762
Long-term borrowings [member] | General loans [member]
Disclosure of detailed information about borrowings [line items]
Annual interest rates description	CD(91D)+0.750
Borrowings	₩ 32,000
Long-term borrowings [member] | Export-Import Bank of Korea [member] | Inter-Korean Cooperation Fund [member]
Disclosure of detailed information about borrowings [line items]
Annual interest rates	1.00%	1.00%	1.00%
Borrowings	₩ 1,480			1,974
Long-term borrowings [member] | Shinhan Bank [member]
Disclosure of detailed information about borrowings [line items]
Borrowings | $		$ 8,910			$ 8,910
Long-term borrowings [member] | Shinhan Bank [member] | General loans [member]
Disclosure of detailed information about borrowings [line items]
Annual interest rates description	Term SOFR(3M)+1.100
Borrowings	₩ 11,489			11,292
Long-term borrowings [member] | Shinhan Bank [member] | General Loans 1 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings				48,158	38,000
Long-term borrowings [member] | Shinhan Bank [member] | General Loans 2 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	₩ 40,655	$ 31,472		39,855	31,472
Long-term borrowings [member] | Shinhan Bank [member] | General Loans 2 [member] | Bottom of range [member]
Disclosure of detailed information about borrowings [line items]
Annual interest rates	1.90%	1.90%	1.90%
Long-term borrowings [member] | Shinhan Bank [member] | General Loans 2 [member] | Top of range [member]
Disclosure of detailed information about borrowings [line items]
Annual interest rates	3.20%	3.20%	3.20%
Long-term borrowings [member] | Shinhan Bank [member] | General Loans 3 [member]
Disclosure of detailed information about borrowings [line items]
Annual interest rates	4.49%	4.49%	4.49%
Borrowings	₩ 62,398			62,398
Long-term borrowings [member] | Shinhan Bank [member] | General Loans 4 [member]
Disclosure of detailed information about borrowings [line items]
Annual interest rates description	Term SOFR(3M)+1.300
Borrowings	₩ 27,241	$ 21,127		26,774	$ 21,127
Long-term borrowings [member] | Shinhan Bank [member] | General Loans 5 [member]
Disclosure of detailed information about borrowings [line items]
Annual interest rates description	Term SOFR(3M)+1.940
Borrowings	₩ 45,129	$ 35,000
Long-term borrowings [member] | Shinhan Bank [member] | General Loans 6 [member]
Disclosure of detailed information about borrowings [line items]
Annual interest rates description	CD(91D)+1.800
Borrowings	₩ 16,900
Long-term borrowings [member] | Shinhan Bank [member] | General Loans 7 [member]
Disclosure of detailed information about borrowings [line items]
Annual interest rates description	EURIBOR(3M)+0.900
Borrowings	₩ 10,985		€ 7,700	10,404		€ 7,700
Long-term borrowings [member] | CA-CIB [member] | General loans [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	₩ 200,000			200,000
Long-term borrowings [member] | CA-CIB [member] | General loans [member] | Bottom of range [member]
Disclosure of detailed information about borrowings [line items]
Annual interest rates	3.38%	3.38%	3.38%
Long-term borrowings [member] | CA-CIB [member] | General loans [member] | Top of range [member]
Disclosure of detailed information about borrowings [line items]
Annual interest rates	4.15%	4.15%	4.15%
Long-term borrowings [member] | Korea Development Bank [member] | General loans [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	₩ 137,000			38,000
Long-term borrowings [member] | Korea Development Bank [member] | General loans [member] | Bottom of range [member]
Disclosure of detailed information about borrowings [line items]
Annual interest rates	3.00%	3.00%	3.00%
Long-term borrowings [member] | Korea Development Bank [member] | General loans [member] | Top of range [member]
Disclosure of detailed information about borrowings [line items]
Annual interest rates	4.87%	4.87%	4.87%
Long-term borrowings [member] | Woori Bank [Member] | General loans [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	₩ 41,526			15,000
Long-term borrowings [member] | Woori Bank [Member] | General loans [member] | Bottom of range [member]
Disclosure of detailed information about borrowings [line items]
Annual interest rates	3.32%	3.32%	3.32%
Long-term borrowings [member] | Woori Bank [Member] | General loans [member] | Top of range [member]
Disclosure of detailed information about borrowings [line items]
Annual interest rates	5.80%	5.80%	5.80%
Long-term borrowings [member] | Woori Bank [Member] | PF Loans [Member]
Disclosure of detailed information about borrowings [line items]
Borrowings				40,682
Long-term borrowings [member] | Kyobo Life Insurance [Member] | PF Loans [Member]
Disclosure of detailed information about borrowings [line items]
Borrowings	₩ 84,586			66,390
Long-term borrowings [member] | Kyobo Life Insurance [Member] | PF Loans [Member] | Bottom of range [member]
Disclosure of detailed information about borrowings [line items]
Annual interest rates description	CD(91D)+1.150
Long-term borrowings [member] | Kyobo Life Insurance [Member] | PF Loans [Member] | Top of range [member]
Disclosure of detailed information about borrowings [line items]
Annual interest rates description	CD(91D) +3.450
Long-term borrowings [member] | Samsung Life Insurance [Member] | PF Loans [Member]
Disclosure of detailed information about borrowings [line items]
Borrowings	₩ 46,992			36,883
Long-term borrowings [member] | Samsung Life Insurance [Member] | PF Loans [Member] | Bottom of range [member]
Disclosure of detailed information about borrowings [line items]
Annual interest rates	1.86%	1.86%	1.86%
Long-term borrowings [member] | Samsung Life Insurance [Member] | PF Loans [Member] | Top of range [member]
Disclosure of detailed information about borrowings [line items]
Annual interest rates	4.16%	4.16%	4.16%
Long-term borrowings [member] | JPM [Member] | General loans [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	₩ 200,000			100,000
Long-term borrowings [member] | JPM [Member] | General loans [member] | Bottom of range [member]
Disclosure of detailed information about borrowings [line items]
Annual interest rates	2.70%	2.70%	2.70%
Long-term borrowings [member] | JPM [Member] | General loans [member] | Top of range [member]
Disclosure of detailed information about borrowings [line items]
Annual interest rates	4.48%	4.48%	4.48%
Long-term borrowings [member] | DBS [Member] | General loans [member]
Disclosure of detailed information about borrowings [line items]
Annual interest rates	4.079%	4.079%	4.079%
Borrowings	₩ 100,000			100,000
Long-term borrowings [member] | Hi Investment Securities [Member] | CP [Member]
Disclosure of detailed information about borrowings [line items]
Annual interest rates	2.302%	2.302%	2.302%
Borrowings	₩ 92,994			90,724
Long-term borrowings [member] | NH Jayang [Member] | PF Loans [Member]
Disclosure of detailed information about borrowings [line items]
Annual interest rates description	CD(91D)+1.150
Borrowings	₩ 53,033			59,066
Long-term borrowings [member] | Standard Chartered Bank Korea [Member] | PF Loans [Member]
Disclosure of detailed information about borrowings [line items]
Borrowings	₩ 56,390			44,260
Long-term borrowings [member] | Standard Chartered Bank Korea [Member] | PF Loans [Member] | Bottom of range [member]
Disclosure of detailed information about borrowings [line items]
Annual interest rates description	CD(91D)+1.150
Long-term borrowings [member] | Standard Chartered Bank Korea [Member] | PF Loans [Member] | Top of range [member]
Disclosure of detailed information about borrowings [line items]
Annual interest rates description	CD(91D) +3.450
Long-term borrowings [member] | Bookook investment [member] | CP [Member]
Disclosure of detailed information about borrowings [line items]
Borrowings	₩ 19,525			18,806
Long-term borrowings [member] | Bookook investment [member] | CP [Member] | Bottom of range [member]
Disclosure of detailed information about borrowings [line items]
Annual interest rates	3.49%	3.49%	3.49%
Long-term borrowings [member] | Bookook investment [member] | CP [Member] | Top of range [member]
Disclosure of detailed information about borrowings [line items]
Annual interest rates	3.603%	3.603%	3.603%
Long-term borrowings [member] | Korea Investment [member] | CP [Member]
Disclosure of detailed information about borrowings [line items]
Annual interest rates	3.622%	3.622%	3.622%
Borrowings	₩ 75,928			₩ 73,039

XML

Borrowings - Summary of Long-term Borrowings (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2023
Disclosure of detailed information about borrowings [line items]
Long term debt repayment	The above Inter-Korean Cooperation Fund is repayable in installments over 13 years after a seven-year grace period.
Vessel facility loans [member] | Shinhan Bank [member]
Disclosure of detailed information about borrowings [line items]
LIBOR rate	5.331%
Vessel facility loans [member] | Woori Bank [Member]
Disclosure of detailed information about borrowings [line items]
LIBOR rate	3.909%
Vessel facility loans [member] | NH Jayang [Member]
Disclosure of detailed information about borrowings [line items]
LIBOR rate	3.82%

XML

Borrowings - Summary of Repayment of Debentures and Borrowings Including the Current Liabilities (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022
Disclosure of detailed information about borrowings [line items]
Borrowings	₩ 10,218,165	₩ 10,006,685
Long-term borrowings [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	1,356,251	₩ 1,083,705
Gross carrying amount [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	10,236,958
Gross carrying amount [member] | Bonds [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	8,454,921
Gross carrying amount [member] | Bonds [member] | In local currency [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	5,808,000
Gross carrying amount [member] | Bonds [member] | In foreign currency [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	2,646,921
Gross carrying amount [member] | Long-term borrowings [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	1,782,037
Gross carrying amount [member] | Long-term borrowings [member] | In local currency [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	1,616,088
Gross carrying amount [member] | Long-term borrowings [member] | In foreign currency [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	165,949
Gross carrying amount [member] | Jan 1, 2023 - Dec 31, 2023 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	3,058,526
Gross carrying amount [member] | Jan 1, 2023 - Dec 31, 2023 [member] | Bonds [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	1,932,941
Gross carrying amount [member] | Jan 1, 2023 - Dec 31, 2023 [member] | Bonds [member] | In local currency [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	1,478,000
Gross carrying amount [member] | Jan 1, 2023 - Dec 31, 2023 [member] | Bonds [member] | In foreign currency [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	454,941
Gross carrying amount [member] | Jan 1, 2023 - Dec 31, 2023 [member] | Long-term borrowings [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	1,125,585
Gross carrying amount [member] | Jan 1, 2023 - Dec 31, 2023 [member] | Long-term borrowings [member] | In local currency [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	1,016,254
Gross carrying amount [member] | Jan 1, 2023 - Dec 31, 2023 [member] | Long-term borrowings [member] | In foreign currency [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	109,331
Gross carrying amount [member] | Jan 1, 2024 - Dec 31, 2024 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	3,083,400
Gross carrying amount [member] | Jan 1, 2024 - Dec 31, 2024 [member] | Bonds [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	2,605,460
Gross carrying amount [member] | Jan 1, 2024 - Dec 31, 2024 [member] | Bonds [member] | In local currency [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	1,445,000
Gross carrying amount [member] | Jan 1, 2024 - Dec 31, 2024 [member] | Bonds [member] | In foreign currency [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	1,160,460
Gross carrying amount [member] | Jan 1, 2024 - Dec 31, 2024 [member] | Long-term borrowings [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	477,940
Gross carrying amount [member] | Jan 1, 2024 - Dec 31, 2024 [member] | Long-term borrowings [member] | In local currency [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	421,322
Gross carrying amount [member] | Jan 1, 2024 - Dec 31, 2024 [member] | Long-term borrowings [member] | In foreign currency [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	56,618
Gross carrying amount [member] | Jan 1, 2025 - Dec 31, 2025 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	1,384,847
Gross carrying amount [member] | Jan 1, 2025 - Dec 31, 2025 [member] | Bonds [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	1,275,760
Gross carrying amount [member] | Jan 1, 2025 - Dec 31, 2025 [member] | Bonds [member] | In local currency [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	760,000
Gross carrying amount [member] | Jan 1, 2025 - Dec 31, 2025 [member] | Bonds [member] | In foreign currency [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	515,760
Gross carrying amount [member] | Jan 1, 2025 - Dec 31, 2025 [member] | Long-term borrowings [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	109,087
Gross carrying amount [member] | Jan 1, 2025 - Dec 31, 2025 [member] | Long-term borrowings [member] | In local currency [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	109,087
Gross carrying amount [member] | Jan 1, 2026 - Dec 31, 2026 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	682,420
Gross carrying amount [member] | Jan 1, 2026 - Dec 31, 2026 [member] | Bonds [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	666,820
Gross carrying amount [member] | Jan 1, 2026 - Dec 31, 2026 [member] | Bonds [member] | In local currency [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	280,000
Gross carrying amount [member] | Jan 1, 2026 - Dec 31, 2026 [member] | Bonds [member] | In foreign currency [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	386,820
Gross carrying amount [member] | Jan 1, 2026 - Dec 31, 2026 [member] | Long-term borrowings [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	15,600
Gross carrying amount [member] | Jan 1, 2026 - Dec 31, 2026 [member] | Long-term borrowings [member] | In local currency [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	15,600
Gross carrying amount [member] | After 2027 [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	2,027,765
Gross carrying amount [member] | After 2027 [member] | Bonds [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	1,973,940
Gross carrying amount [member] | After 2027 [member] | Bonds [member] | In local currency [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	1,845,000
Gross carrying amount [member] | After 2027 [member] | Bonds [member] | In foreign currency [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	128,940
Gross carrying amount [member] | After 2027 [member] | Long-term borrowings [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	53,825
Gross carrying amount [member] | After 2027 [member] | Long-term borrowings [member] | In local currency [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	53,825
Gross carrying amount [member] | After 2027 [member] | Long-term borrowings [member] | In foreign currency [member]
Disclosure of detailed information about borrowings [line items]
Borrowings	₩ 0

XML

Provisions - Summary of Changes in Provisions (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Disclosure of other provisions [line items]
Beginning balance	₩ 200,366	₩ 257,397
Increase (Transfer)	37,629	24,879
Usage	(14,708)	(30,081)
Reversal	(2,784)	(51,789)
Scope change	(177)
Others	1,897	(40)
Ending balance	222,223	200,366
Current	115,209	109,133
Non-current	107,014	91,233
Litigation [member]
Disclosure of other provisions [line items]
Beginning balance	36,329	80,165
Increase (Transfer)	592	6,005
Usage	(7,179)	(6,155)
Reversal	(35)	(43,686)
Ending balance	29,707	36,329
Current	29,130	34,730
Non-current	577	1,599
Restoration cost [member]
Disclosure of other provisions [line items]
Beginning balance	108,962	107,358
Increase (Transfer)	26,381	13,027
Usage	(1,138)	(8,143)
Reversal	(653)	(3,685)
Others	(393)	405
Ending balance	133,159	108,962
Current	26,945	19,918
Non-current	106,214	89,044
Others [member]
Disclosure of other provisions [line items]
Beginning balance	55,075	69,874
Increase (Transfer)	10,656	5,847
Usage	(6,391)	(15,783)
Reversal	(2,096)	(4,418)
Scope change	(177)
Others	2,290	(445)
Ending balance	59,357	55,075
Current	59,134	54,485
Non-current	₩ 223	₩ 590

XML

Net Defined Benefit Liabilities (Assets) - Summary of Amount Recognized in the Statements of Financial Position (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022
Disclosure of net defined benefit liability (asset) [abstract]
Present value of defined benefit obligations	₩ 2,365,793	₩ 2,218,655
Fair value of plan assets	(2,462,925)	(2,478,143)
Liabilities	63,616	51,654
Assets	₩ 160,748	₩ 311,142

XML

Net Defined Benefit Liabilities (Assets) - Summary of Changes in the Defined Benefit Obligations (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure of net defined benefit liability (asset) [Line Items]
Current service cost	₩ (213,922)	₩ (238,068)	₩ (249,125)
Interest expense	(17,462)	3,139	5,047
Remeasurements:
Acquisition and disposition of businesses, etc.	(5,564)	8,587	5,128
Present value of defined benefit obligation [member]
Disclosure of net defined benefit liability (asset) [Line Items]
Beginning balance	2,218,655	2,494,930
Current service cost	213,489	238,068
Interest expense	103,874	59,041
Benefit paid	(358,298)	(316,047)
Changes due to settlements of plan & Past Service Cost	1	(701)
Remeasurements:
Actuarial gains (losses) arising from changes in demographic assumptions	1,903	(13,048)
Actuarial gains (losses) arising from changes in financial assumptions	138,462	(323,501)
Actuarial gains arising from experience adjustments	48,174	80,845
Acquisition and disposition of businesses, etc.	(467)	(932)
Ending balance	₩ 2,365,793	₩ 2,218,655	₩ 2,494,930

XML

Net Defined Benefit Liabilities (Assets) - Summary of Changes in the Fair Value of Plan Assets (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure of net defined benefit liability (asset) [Line Items]
Interest income	₩ (17,462)	₩ 3,139	₩ 5,047
Plan assets [member]
Disclosure of net defined benefit liability (asset) [Line Items]
Beginning	2,478,143	2,314,632
Interest income	121,336	55,902
Remeasurements:
Return on plan assets (excluding amounts included in interest income)	9,410	(8,542)
Benefits paid	(307,762)	(287,419)
Employer contributions	165,128	401,358
Changes in scope of consolidation, etc.	(3,330)	2,212
Ending	₩ 2,462,925	₩ 2,478,143	₩ 2,314,632

XML

Net Defined Benefit Liabilities (Assets) - Summary of Amounts Recognized in the Consolidated Statements of Operations (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Changes in net defined benefit liability (asset) [abstract]
Current service cost	₩ 213,922	₩ 238,068	₩ 249,125
Net Interest cost	(17,462)	3,139	5,047
Changes due to settlements of plan & Past Service Cost	1	(701)	(681)
Transfer out	(13,435)	(15,102)	(16,660)
Total expenses	₩ 183,026	₩ 225,404	₩ 236,831

XML

Net Defined Benefit Liabilities (Assets) - Summary of Principal Actuarial Assumptions (Detail)	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Bottom of range [member]
Disclosure of defined benefit plans [line items]
Discount rate	3.67%	2.40%	2.10%
Salary growth rate	1.70%	1.82%	1.00%
Top of range [member]
Disclosure of defined benefit plans [line items]
Discount rate	5.51%	6.29%	3.70%
Salary growth rate	8.96%	8.90%	6.97%

XML

Net Defined Benefit Liabilities (Assets) - Summary of Sensitivity of the Defined Benefit Obligations (Detail) ₩ in Millions	Dec. 31, 2023 KRW (₩)
Discount rate [member]
Disclosure of sensitivity analysis for actuarial assumptions [Line items]
Percentage changes in assumption	0.50%
Effect on defined benefit obligation, increase in assumption	₩ (139,461)
Effect on defined benefit obligation, decrease in assumption	₩ 150,568
Salary growth rate [member]
Disclosure of sensitivity analysis for actuarial assumptions [Line items]
Percentage changes in assumption	0.50%
Effect on defined benefit obligation, increase in assumption	₩ 145,687
Effect on defined benefit obligation, decrease in assumption	₩ (135,431)

XML

Net Defined Benefit Liabilities (Assets) - Additional Information (Detail) ₩ in Millions	12 Months Ended
	Dec. 31, 2023 KRW (₩)
Disclosure of net defined benefit liability (asset) [Line Items]
Expected contributions to post-employment benefit plans	₩ 273,503
Weighted average duration of the defined benefit obligations	6 years 2 months 12 days

XML

Net Defined Benefit Liabilities (Assets) - Summary of Expected Maturity Analysis of Undiscounted Pension Benefits (Detail) ₩ in Millions	Dec. 31, 2023 KRW (₩)
Disclosure of net defined benefit liability (asset) [Line Items]
Pension benefits	₩ 3,556,910
Less than 1 year [member]
Disclosure of net defined benefit liability (asset) [Line Items]
Pension benefits	257,315
Between 1-2 years [member]
Disclosure of net defined benefit liability (asset) [Line Items]
Pension benefits	376,352
Between 2-5 years [member]
Disclosure of net defined benefit liability (asset) [Line Items]
Pension benefits	910,076
More than 5 years [member]
Disclosure of net defined benefit liability (asset) [Line Items]
Pension benefits	₩ 2,013,167

XML

Defined Contribution Plan - Additional Information (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Classes of employee benefits expense [abstract]
Defined Contribution plan recognized expenses	₩ 85,174	₩ 72,576	₩ 71,068

XML

Commitments and Contingencies - Summary of Major Commitments with Local Financial Institutions (Detail) - Dec. 31, 2023 € in Thousands, ¥ in Thousands, $ in Thousands, ₩ in Millions	KRW (₩)	USD ($)	EUR (€)	JPY (¥)
Disclosure of detailed information about borrowings [line items]
Limit	₩ 3,497,090	$ 2,046,509,000	€ 7,700,000	¥ 400,000,000
Used amount	619,543	2,046,509,000	7,700,000	400,000,000
Bank overdraft [member] | Kookmin Bank and others [member]
Disclosure of detailed information about borrowings [line items]
Limit	374,000
Used amount	0
Inter-Korean Cooperation Fund [member] | Export-Import Bank of Korea [member]
Disclosure of detailed information about borrowings [line items]
Limit	37,700
Used amount	1,480
Economic Cooperation Business Insurance [member] | Export-Import Bank of Korea [member]
Disclosure of detailed information about borrowings [line items]
Limit	3,240
Used amount	1,732
Collateralised loans on electronic receivable-trade [member] | Kookmin Bank and others [member]
Disclosure of detailed information about borrowings [line items]
Limit	545,350
Used amount	42,822
Plus electronic notes payable [member] | Industrial Bank of Korea [member]
Disclosure of detailed information about borrowings [line items]
Limit	50,000
Used amount	885
Working capital loan [member] | Korea Development Bank and others [member]
Disclosure of detailed information about borrowings [line items]
Limit	1,562,800
Used amount	142,700
Working capital loan [member] | Shinhan Bank [member]
Disclosure of detailed information about borrowings [line items]
Limit | $		76,509
Used amount | $		76,509
Working capital loan [member] | Woori Bank [Member]
Disclosure of detailed information about borrowings [line items]
Limit | €			7,700
Used amount | €			€ 7,700
Facility loans [member] | Shinhan Bank and others [member]
Disclosure of detailed information about borrowings [line items]
Limit	924,000
Used amount	₩ 429,924
Derivatives transaction limit [member] | Korea Development Bank and others [member]
Disclosure of detailed information about borrowings [line items]
Limit | $		1,970,000
Used amount | $		$ 1,970,000
Citi Bank [Member]
Disclosure of detailed information about borrowings [line items]
Limit | ¥				400,000
Used amount | ¥				¥ 400,000

XML

Commitments and Contingencies - Summary of Guarantees Received from Financial Institutions (Detail) - Dec. 31, 2023 ₫ in Thousands, $ in Thousands, ₩ in Millions	KRW (₩)	USD ($)	VND (₫)
Disclosure of detailed information about borrowings [line items]
Guarantees limit	₩ 2,749,522	$ 122,689	₫ 211,262
Guarantee for payment in korean currency [member] | Hana Bank [Member]
Disclosure of detailed information about borrowings [line items]
Guarantees limit	4,000
Guarantee for payment in korean currency [member] | Woori Bank [Member]
Disclosure of detailed information about borrowings [line items]
Guarantees limit	5,200
Comprehensive Credit Line and Others [Member] | Hana Bank [Member]
Disclosure of detailed information about borrowings [line items]
Guarantees limit	3,100	10,300
Guarantee for payment in foreign currency [member] | Hana Bank [Member]
Disclosure of detailed information about borrowings [line items]
Guarantees limit | $		59
Guarantee for payment in foreign currency [member] | Kookmin Bank [member]
Disclosure of detailed information about borrowings [line items]
Guarantees limit | $		3,186
Guarantee for payment in foreign currency [member] | Woori Bank [Member]
Disclosure of detailed information about borrowings [line items]
Guarantees limit | $		7,000
Guarantee for payment in korean currency and others [Member] | Shinhan Bank [member]
Disclosure of detailed information about borrowings [line items]
Guarantees limit | $		94,517
Guarantee For Payment In Foreign Currency And Others [Member] | Shinhan Bank [member]
Disclosure of detailed information about borrowings [line items]
Guarantees limit | ₫			₫ 211,262
Refund guarantee for advances received [Member] | Korea Development Bank [member]
Disclosure of detailed information about borrowings [line items]
Guarantees limit | $		6,811
Guarantees for depositions [Member] | H S B C [Member]
Disclosure of detailed information about borrowings [line items]
Guarantees limit | $		$ 816
Performance guarantee and others [Member] | Seoul Guarantee Insurance Company [Member]
Disclosure of detailed information about borrowings [line items]
Guarantees limit	366,395
Performance guarantee and others [Member] | Korea Software Financial Cooperative [member]
Disclosure of detailed information about borrowings [line items]
Guarantees limit	1,556,979
Performance guarantee and others [Member] | Korea Specialty Contractor Financial Cooperative [Member]
Disclosure of detailed information about borrowings [line items]
Guarantees limit	135
Performance guarantee and others [Member] | Korea Housing Finance Corporation [Member]
Disclosure of detailed information about borrowings [line items]
Guarantees limit	44,000
Performance guarantee and others [Member] | Korea Housing Urban Guarantee Corporation [member]
Disclosure of detailed information about borrowings [line items]
Guarantees limit	691,530
Performance guarantee and others [Member] | Information Communication Financial Cooperative [Member]
Disclosure of detailed information about borrowings [line items]
Guarantees limit	₩ 78,183

XML

Commitments and Contingencies - Summary of Guarantees Received from Financial Institutions (Parenthetical) (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure of detailed information about borrowings [line items]
Inventory Assets	₩ 988,351	₩ 717,673
Investment properties	2,198,135	₩ 1,933,358	₩ 1,720,654
Collateral [Member]
Disclosure of detailed information about borrowings [line items]
Inventory Assets	278,031
Investment properties	₩ 283,688

XML

Commitments and Contingencies - Summary of Guarantees Provided by the Group for Third Parties (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Disclosure of detailed information about borrowings [line items]
Used amount	₩ 10,218,165	₩ 10,006,685
KT Estate Inc. [member] | Hana Bank [Member] | Guarantees [member]
Disclosure of detailed information about borrowings [line items]
Subject to payment guarantees	Wonju Bando U-bora Mark Bridge Buyer
Limit	₩ 103,000
Used amount	₩ 55,314
KT Engineering Co Ltd [Member] | Shinhan Bank [member] | Guarantees [member]
Disclosure of detailed information about borrowings [line items]
Subject to payment guarantees	Gasan Solar Power Plant Inc.
Limit	₩ 4,700
Used amount	₩ 364
KT Engineering Co Ltd [Member] | Suhyup Bank [Member] | Guarantees [member]
Disclosure of detailed information about borrowings [line items]
Subject to payment guarantees	Korea Cell Inc.
Limit	₩ 3,250
Used amount	₩ 50
KT Engineering Co Ltd [Member] | Suhyup Bank One [Member] | Guarantees [member]
Disclosure of detailed information about borrowings [line items]
Subject to payment guarantees	San-Ya Agricultural Association Corporation
Limit	₩ 3,250
Used amount	₩ 51
KT Alpha Co Ltd [Member] | T-commerce cash payers [Member] | Guarantees [member]
Disclosure of detailed information about borrowings [line items]
Subject to payment guarantees	Cash payers
Limit	₩ 821
Used amount	₩ 0
Nasmedia, Co., Ltd. [Member] | Korea Securities Finance Corp [Member] | Guarantees [member]
Disclosure of detailed information about borrowings [line items]
Subject to payment guarantees	Stockholders Association Members
Limit	₩ 1,104
Used amount	₩ 610
Bottom of range [member] | KT Estate Inc. [member] | Hana Bank [Member] | Guarantees [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Aug. 5, 2022
Bottom of range [member] | KT Engineering Co Ltd [Member] | Shinhan Bank [member] | Guarantees [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Jan. 7, 2010
Bottom of range [member] | KT Engineering Co Ltd [Member] | Suhyup Bank [Member] | Guarantees [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Feb. 17, 2014
Bottom of range [member] | KT Engineering Co Ltd [Member] | Suhyup Bank One [Member] | Guarantees [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Feb. 17, 2014
Bottom of range [member] | KT Alpha Co Ltd [Member] | T-commerce cash payers [Member] | Guarantees [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Apr. 14, 2023
Top of range [member] | KT Estate Inc. [member] | Hana Bank [Member] | Guarantees [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Feb. 28, 2025
Top of range [member] | KT Engineering Co Ltd [Member] | Shinhan Bank [member] | Guarantees [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Jan. 8, 2025
Top of range [member] | KT Engineering Co Ltd [Member] | Suhyup Bank [Member] | Guarantees [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Feb. 16, 2024
Top of range [member] | KT Engineering Co Ltd [Member] | Suhyup Bank One [Member] | Guarantees [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Feb. 16, 2024
Top of range [member] | KT Alpha Co Ltd [Member] | T-commerce cash payers [Member] | Guarantees [member]
Disclosure of detailed information about borrowings [line items]
Maturity	Apr. 12, 2024

XML

Commitments and Contingencies - Additional Information (Detail) $ in Thousands, ₩ in Millions	12 Months Ended
	Dec. 31, 2023 KRW (₩) EUR (€)	Dec. 31, 2023 USD ($) EUR (€)	Dec. 31, 2022 KRW (₩)
Commitments and Contingencies [Line Items]
Severally liable for reimbursement	₩ 595
Number of lawsuits | €	177	177
Litigation settlement claim amount	₩ 167,834		₩ 80,279
Litigation provision	₩ 29,707
New town development consortium percentage of ownership interest	2.50%	2.50%
Contract amount not yet recognized as liabilities	₩ 489,231		₩ 1,294,823
Additional cumulative investment amount	4,132	$ 30,350
Estimated financial effect of contingent liabilities	₩ 438,312
Percentage of estimated financial effect of contingent liabilities	100.00%
K Defense Co.Ltd [member]
Commitments and Contingencies [Line Items]
Estimated financial effect of contingent liabilities	₩ 302,423
Percentage of estimated financial effect of contingent liabilities	60.00%
Joint operations [member]
Commitments and Contingencies [Line Items]
Estimated financial effect of contingent liabilities	₩ 201,615
Percentage of estimated financial effect of contingent liabilities	40.00%

XML

Leases - Summary of balance sheet information about leases for lessee (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022
Disclosure of balance sheet information about leases for lessee [Line Items]
Right-of-use assets	₩ 1,304,963	₩ 1,280,334
Lease liabilities
Lease liability recognized	1,179,909	1,172,038
Previously stated [member]
Lease liabilities
Current	307,868	315,892
Non-Current	872,042	856,146
Lease liability recognized	1,179,910	1,172,038
Property and building [member] | Previously stated [member]
Disclosure of balance sheet information about leases for lessee [Line Items]
Right-of-use assets	1,019,537	1,081,067
Machinery and communication line facilities [member] | Previously stated [member]
Disclosure of balance sheet information about leases for lessee [Line Items]
Right-of-use assets	89,150	50,794
Other [member] | Previously stated [member]
Disclosure of balance sheet information about leases for lessee [Line Items]
Right-of-use assets	₩ 196,276	₩ 148,473

XML

Leases - Summary of statement of profit or loss information about leases for lessee (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure of statement of profit or loss information about leases for lessee [Line Items]
Depreciation of Right-of-use assets	₩ 402,737	₩ 396,214	₩ 398,716
Depreciation of Investment Properties	0	15	1,794
Interest expense relating to lease liabilities	52,035	41,469	36,651
Expense relating to short-term leases	8,804	12,876	7,984
Expense relating to leases of low-value assets that are not short-term leases	26,290	26,813	26,033
Expense relating to variable lease payments not included in lease liabilities	9,288	4,827	8,400
Property and building [member]
Disclosure of statement of profit or loss information about leases for lessee [Line Items]
Depreciation of Right-of-use assets	297,571	305,120	303,984
Machinery and communication line facilities [member]
Disclosure of statement of profit or loss information about leases for lessee [Line Items]
Depreciation of Right-of-use assets	32,794	31,140	41,794
Other [member]
Disclosure of statement of profit or loss information about leases for lessee [Line Items]
Depreciation of Right-of-use assets	₩ 72,372	₩ 59,954	₩ 52,938

XML

Leases - Additional Information (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure Of Arrangement Involving Legal Form Of Lease [Abstract]
Cash outflow for leases	₩ 500,392	₩ 464,337	₩ 468,360
Increase decrease in right of use assets	₩ 440,552	₩ 405,453

XML

Share Capital - Summary of Share Capital (Detail) ₩ in Millions	Dec. 31, 2023 KRW (₩) shares	Dec. 31, 2023 $ / shares	Dec. 31, 2022 KRW (₩) shares	Dec. 31, 2022 $ / shares
Disclosure of classes of share capital [Line Items]
Ordinary Shares	₩ 1,564,499		₩ 1,564,499
Ordinary shares [member]
Disclosure of classes of share capital [Line Items]
Number of issued shares | shares	257,860,760		261,111,808
Par value per share | $ / shares		$ 5,000		$ 5,000
Ordinary Shares	₩ 1,564,499		₩ 1,564,499

XML

Share Capital - Summary of Share Capital (Parenthetical) (Detail) - shares	Dec. 31, 2023	Dec. 31, 2022
Disclosure of classes of share capital [abstract]
Treasury shares	55,039,007	55,039,007

XML

Retained Earnings - Summary of Retained Earnings (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022
Miscellaneous equity [abstract]
Legal reserve	₩ 782,249	₩ 782,249
Voluntary reserves	4,651,362	4,651,362
Unappropriated retained earnings	9,042,256	8,821,705
Total	₩ 14,475,867	₩ 14,255,316

XML

Retained Earnings - Summary of Retained Earnings (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Miscellaneous equity [abstract]
Minimum percentage of cash dividend declared appropriation to legal reserve	10.00%	10.00%
Percentage of legal reserve equal to capital stock issued	50.00%	50.00%

XML

Accumulated Other Comprehensive Income and Other Components of Equity - Summary of Accumulated Other Comprehensive Income (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Total accumulated other comprehensive income	₩ 52,407	₩ (77,776)	₩ 117,469
Changes in investments in associates and joint ventures [member]
Total accumulated other comprehensive income	4,023	(11,752)	(3,461)
Gain (loss) on derivatives valuation [member]
Total accumulated other comprehensive income	(29,361)	(7,109)	25,031
Gain (loss) on valuation of financial assets at fair value through other comprehensive income [member]
Total accumulated other comprehensive income	73,928	(52,100)	108,685
Exchange differences on translation for foreign operations [member]
Total accumulated other comprehensive income	₩ 3,817	₩ (6,815)	₩ (12,786)

XML

Accumulated Other Comprehensive Income and Other Components of Equity - Summary of Changes in Accumulated Other Comprehensive Income (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Beginning	₩ (77,776)	₩ 117,469
Increase /decrease	168,125	(99,824)
Reclassified to gain or loss	(37,942)	(95,421)
Ending	52,407	(77,776)
Changes in investments in associates and joint ventures [member]
Beginning	(11,752)	(3,461)
Increase /decrease	15,775	(8,291)
Ending	4,023	(11,752)
Gain (loss) on derivatives valuation [member]
Beginning	(7,109)	25,031
Increase /decrease	15,690	63,281
Reclassified to gain or loss	(37,942)	(95,421)
Ending	(29,361)	(7,109)
Gain (loss) on valuation of financial assets at fair value through other comprehensive income [member]
Beginning	(52,100)	108,685
Increase /decrease	126,028	(160,785)
Ending	73,928	(52,100)
Exchange differences on translation for foreign operations [member]
Beginning	(6,815)	(12,786)
Increase /decrease	10,632	5,971
Ending	₩ 3,817	₩ (6,815)

XML

Accumulated Other Comprehensive Income and Other Components of Equity - Summary of Other Components of Equity (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Miscellaneous equity [abstract]
Treasury stock	₩ (398,075)	₩ (202,295)
Gain or loss on disposal of treasury stock	3,220	(41,503)
Share-based payments	8,773	6,222
Others	(416,336)	(334,576)
Total	₩ (802,418)	₩ (572,152)

XML

Accumulated Other Comprehensive Income and Other Components of Equity - Summary of Other Components of Equity (Parenthetical) (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Miscellaneous equity [abstract]
Treasury shares, Amount directly reflected in equity	₩ 101	₩ 14,886

XML

Accumulated Other Comprehensive Income and Other Components of Equity - Summary of Treasury Stock (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022
Miscellaneous equity [abstract]
Number of shares (in shares)	11,447,338	5,069,130
Amounts (in millions of Korean won)	₩ 398,075	₩ 202,295

XML

Share-based Payments - Summary of Details of Share-based Payments (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
16th grant [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Fair value per option		₩ 36,941
Total compensation costs		₩ 9,442
17th grant [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Fair value per option	₩ 30,205
Total compensation costs	₩ 7,262

XML

Share-based Payments - Summary of Changes in the Number of Stock Options and the Weighted-Average Exercise Price (Detail)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Beginning	258,509	284,209
Grant	307,182	258,509
Expired	(105,859)	(155,286)
Exercised	(131,690)	(128,923)
Ending	328,142	258,509
15th grant [member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Beginning	0	284,209
Grant		0
Expired		(155,286)
Exercised		(128,923)
Ending		0
16th grant [member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Beginning	258,509
Grant	0	258,509
Expired	(105,859)
Exercised	(131,690)
Ending	20,960	258,509
17th grant [member]
Disclosure of terms and conditions of share-based payment arrangement [Line Items]
Grant	307,182
Ending	307,182

XML

Share-based Payments - Summary of Changes in the Number of Stock Options and the Weighted-Average Exercise Price (Parenthetical) (Detail) - $ / shares	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Disclosure of terms and conditions of share-based payment arrangement [abstract]
Weighted average exercise price of share options exercised	$ 29,550	$ 35,450

XML

Revenue from Contracts with Customers, Other Income and Relevant Contract Assets and Liabilities - Detail Explanation of Revenue And Other Income in the consolidated Statement of operations (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure of disaggregation of revenue from contracts with customers [abstract]
Revenue from contracts with customers	₩ 26,063,185	₩ 25,432,727	₩ 24,712,128
Revenue from other sources	224,016	206,128	185,877
Other income (Note 26)	308,044	595,351	307,654
Operating revenue and other Income	₩ 26,595,245	₩ 26,234,206	₩ 25,205,659

XML

Revenue from Contracts with Customers, Other Income and Relevant Contract Assets and Liabilities - Detail Explanation of Operating Revenues And Other Income (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure of disaggregation of revenue from contracts with customers [abstract]
Mobile services	₩ 7,140,333	₩ 7,013,889	₩ 6,936,485
Fixed-line services	5,142,359	5,056,513	4,960,338
Fixed-line and VoIP telephone services	1,249,024	1,378,265	1,465,059
Broadband Internet access services	2,578,558	2,504,833	2,343,591
Data communication services	1,314,777	1,173,415	1,151,689
Media and content	3,206,521	3,099,776	2,800,630
Financial services	3,967,763	3,836,589	3,661,896
Sale of goods	3,292,514	3,393,646	3,532,973
Others	3,845,755	3,833,793	3,313,337
Total	₩ 26,595,245	₩ 26,234,206	₩ 25,205,659

XML

Revenue from Contracts with Customers, Other Income and Relevant Contract Assets and Liabilities - Detail Analysis of Contract with Customer Assets and Liabilities (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022
Disclosure of revenue from contracts with customers [line items]
Contract assets	₩ 832,520	₩ 802,253
Contract liabilities	278,749	284,107
Deferred revenue	27,392	46,493
Revenue from contracts with customers [member]
Disclosure of revenue from contracts with customers [line items]
Contract assets	1,130,745	963,133
Contract liabilities	311,023	344,869
Deferred revenue	₩ 81,067	₩ 81,653

XML

Revenue from Contracts with Customers, Other Income and Relevant Contract Assets and Liabilities - Detail Analysis of Contract with Customer Assets and Liabilities (Parenthetical) (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022
Disclosure of revenue from contracts with customers [line items]
Contract assets	₩ 832,520	₩ 802,253
Contract liabilities	278,749	284,107
long term construction contract [Member]
Disclosure of revenue from contracts with customers [line items]
Contract assets	308,821	160,880
Contract liabilities	₩ 32,274	₩ 60,762

XML

Revenue from Contracts with Customers, Other Income and Relevant Contract Assets and Liabilities - Detail Analysis of Contract Costs Recognized as Assets (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Incremental cost of contract establishment [Member]
Statement [Line Items]
Incremental cost of contract establishment	₩ 1,656,711	₩ 1,744,096	₩ 1,726,401
Cost of Contract performance [Member]
Statement [Line Items]
Incremental cost of contract establishment	₩ 70,757	₩ 73,582	₩ 74,843

XML

Revenue from Contracts with Customers, Other Income and Relevant Contract Assets and Liabilities - Additional Information (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure of disaggregation of revenue from contracts with customers [abstract]
Operating expenses	₩ 1,759,586	₩ 1,793,013	₩ 1,842,621

XML

Revenue from Contracts with Customers, Other Income and Relevant Contract Assets and Liabilities - Detail of Revenue Arising from Carried-Forward Contract Liabilities (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure of disaggregation of revenue from contracts with customers [abstract]
Allocation of the transaction price	₩ 213,609	₩ 246,843	₩ 275,965
Deferred revenue of joining/installment fee	41,824	44,204	42,100
Total	₩ 255,433	₩ 291,047	₩ 318,065

XML

Other Income - Summary Of Other Income (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Text block [abstract]
Gains on disposal of property and equipment and investment properties	₩ 22,447	₩ 52,603	₩ 54,007
Gains on disposal of intangible assets	1,727	622	1,726
Gain on disposal of right-of-use assets	3,580	3,326	3,138
Property and Equipment loss recovery income	152,712	159,849	148,927
Gains on government subsidies	40,725	44,473	43,822
Income from government subsidies	6,982	38,319	5
Gain on disposal of investments in subsidiaries	28,825	216,591	244
Others	51,046	79,568	55,785
Total	₩ 308,044	₩ 595,351	₩ 307,654

XML

Operating Expenses - Summary of Operating Expenses (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Profit (loss) [abstract]
Employee benefit cost	₩ 4,556,832	₩ 4,495,885	₩ 4,215,810
Depreciation	2,723,610	2,637,463	2,605,594
Depreciation of right-of-use assets	402,737	396,214	398,716
Amortization of intangible assets	683,784	622,202	603,327
Commissions	1,264,729	1,295,434	1,125,944
Interconnection charges	436,598	479,500	507,567
International interconnection fee	140,433	186,253	192,008
Purchase of inventories	3,595,345	3,656,040	3,753,792
Changes of inventories	(203,071)	(195,046)	20,491
Sales commission	2,353,318	2,353,909	2,343,375
Service cost	2,229,709	2,334,386	2,296,324
Utilities	544,675	368,348	364,373
Taxes and dues	250,651	276,962	268,651
Rent	167,576	160,848	123,246
Insurance premium	66,737	68,245	66,717
Installation fee	174,238	150,140	154,542
Advertising expenses	153,750	195,519	171,400
Allowance for bad debts	150,549	115,358	82,329
Card service cost	3,189,376	3,127,673	3,114,047
Loss on disposal of property and equipment	72,710	81,415	71,417
Loss on disposal of intangible assets	5,328	7,015	3,885
Loss on disposal of right-of-use assets	2,115	2,348	11,457
Loss on disposal of investments in subsidiaries	0	0	13,727
Impairment loss on property and equipment	7,871	16,094	2,115
Impairment loss on intangible assets	236,206	30,965	3,747
Donations	24,664	15,642	10,981
Other allowance for bad debts	34,112	17,551	28,066
Others	1,902,214	1,369,686	952,614
Total	₩ 25,166,796	₩ 24,266,049	₩ 23,506,262

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Operating Expenses - Summary of Details of Employee Benefits (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Profit (loss) [abstract]
Salaries & Wages	₩ 4,231,781	₩ 4,161,874	₩ 3,837,359
Post-employment benefits (Defined benefit plan)	183,026	225,404	236,831
Post-employment benefits (Defined contribution plan)	85,174	72,576	71,068
Share-based payment	15,450	16,799	47,415
Others	41,401	19,232	23,137
Total	₩ 4,556,832	₩ 4,495,885	₩ 4,215,810

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Financial Income and Costs - Summary of Details of Financial Income (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure Of Finance Income [line items]
Interest income	₩ 279,607	₩ 271,925	₩ 273,460
Gain on foreign currency transactions	27,407	67,976	19,976
Gain on foreign currency translation	11,944	43,092	32,768
Gain on derivative transactions	12,304	50,668	2,215
Gain on valuation of derivatives	49,881	182,998	255,149
Gain on valuation of financial instruments	32,477	31,032	90,653
Others	69,216	42,737	52,062
Total	486,277	₩ 690,428	₩ 726,283
Loans and receivables [member]
Disclosure Of Finance Income [line items]
Gain on disposal of trade receivables	₩ 3,441

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Financial Income and Costs - Summary of Details of Financial Expense (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure Of Finance Income [line items]
Interest expenses	₩ 356,345	₩ 293,854	₩ 263,389
Loss on foreign currency transactions	34,281	81,171	13,105
Loss on foreign currency translation	95,730	200,109	213,689
Loss on derivative transactions	417	24,331	6,287
Loss on valuation of derivatives	6,598	21,601	15,947
Loss on valuation of financial instruments	55,049	65,660	25,994
Others	2,282	485	2,207
Total	568,682	749,908	563,330
Loans and receivables [member]
Disclosure Of Finance Income [line items]
Loss on disposal of trade receivables	₩ 17,980	₩ 62,697	₩ 22,712

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Deferred Income Tax and Income Tax Expense - Summary of Analysis of Deferred Tax Assets and Deferred Tax Liabilities (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Deferred income tax assets	₩ 614,500	₩ 579,090
Deferred income tax liabilities	(994,330)	(967,650)
Gross carrying amount [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Deferred income tax assets	2,228,333	2,306,400
Deferred income tax liabilities	(2,608,163)	(2,694,960)
Gross carrying amount [member] | Less than 1 year [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Deferred income tax assets	404,234	398,710
Deferred income tax liabilities	(491,817)	(586,522)
Gross carrying amount [member] | Over 12 months [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Deferred income tax assets	1,824,099	1,907,690
Deferred income tax liabilities	₩ (2,116,346)	₩ (2,108,438)

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Deferred Income Tax and Income Tax Expense - Summary of Movement in Deferred Income Tax Assets and Liabilities (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Beginning	₩ (388,560)	₩ (220,230)
Statements of profit or loss	16,827	(169,961)	₩ (229,545)
Other comprehensive income	(8,097)	1,631
Ending	(379,830)	(388,560)	(220,230)
Deferred tax liabilities investment in subsidiaries associates and joint ventures [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Beginning	(255,184)	(240,633)
Statements of profit or loss	(7,821)	(18,299)
Other comprehensive income	(7,225)	3,748
Ending	(270,230)	(255,184)	(240,633)
Deferred tax liabilities depreciation and impairment loss [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Beginning	(151,433)	(88,588)
Statements of profit or loss	39,309	(62,845)
Ending	(112,124)	(151,433)	(88,588)
Deferred tax liabilities plan assets [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Beginning	(542,900)	(538,928)
Statements of profit or loss	8,367	(5,294)
Other comprehensive income	826	1,322
Ending	(533,707)	(542,900)	(538,928)
Deferred tax liabilities advanced depreciation provision [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Beginning	(521,939)	(339,005)
Statements of profit or loss	3,859	(182,934)
Ending	(518,080)	(521,939)	(339,005)
Deferred tax liabilities contract assets [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Beginning	(424,302)	(493,917)
Statements of profit or loss	2,478	69,615
Ending	(421,824)	(424,302)	(493,917)
Deferred tax liabilities financial assets at fair value through profit or loss [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Beginning	(420)	(336)
Statements of profit or loss	461	(73)
Other comprehensive income	43	(11)
Ending	84	(420)	(336)
Deferred tax liabilities Financial assets at fair value through other comprehensive income [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Beginning	(60,629)	(47,521)
Statements of profit or loss	(53)	(71,396)
Other comprehensive income	(41,945)	58,288
Ending	(102,627)	(60,629)	(47,521)
Other deferred tax liabilities [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Beginning	(738,153)	(623,744)
Statements of profit or loss	90,876	(111,135)
Other comprehensive income	(2,378)	(3,274)
Ending	(649,655)	(738,153)	(623,744)
Deferred tax liabilities [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Beginning	(2,694,960)	(2,372,672)
Statements of profit or loss	137,476	(382,361)
Other comprehensive income	(50,679)	60,073
Ending	(2,608,163)	(2,694,960)	(2,372,672)
Deferred tax assets depreciation and impairment loss [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Beginning	188,832	225,821
Statements of profit or loss	(71,689)	(36,989)
Other comprehensive income	(397)
Ending	116,746	188,832	225,821
Deferred tax assets contract liabilities [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Beginning	121,289	148,454
Statements of profit or loss	(9,311)	(27,165)
Ending	111,978	121,289	148,454
Deferred tax assets defined benefit liabilities [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Beginning	481,858	571,336
Statements of profit or loss	(6,705)	(22,423)
Other comprehensive income	40,838	(67,055)
Ending	515,991	481,858	571,336
Deferred tax assets provisions [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Beginning	151,955	172,871
Statements of profit or loss	(5,784)	(20,894)
Other comprehensive income	0	(22)
Ending	146,171	151,955	172,871
Other deferred tax assets [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Beginning	1,259,495	899,543
Statements of profit or loss	(53,459)	351,317
Other comprehensive income	2,141	8,635
Ending	1,208,177	1,259,495	899,543
Deferred tax assets [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Beginning	2,203,429	2,018,025
Statements of profit or loss	(146,948)	243,846
Other comprehensive income	42,582	(58,442)
Ending	2,099,063	2,203,429	2,018,025
Temporary differences [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Beginning	(491,531)	(354,647)
Statements of profit or loss	(9,472)	(138,515)
Other comprehensive income	(8,097)	1,631
Ending	(509,100)	(491,531)	(354,647)
Deferred tax assets tax credit carry forwards [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [Line Items]
Beginning	102,971	134,417
Statements of profit or loss	26,299	(31,446)
Ending	₩ 129,270	₩ 102,971	₩ 134,417

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Deferred Income Tax and Income Tax Expense - Summary of Tax Impacts Recognized Directly To Equity (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Deferred tax assets and liabilities [abstract]
Gain (loss) on valuation of financial assets at fair value through other comprehensive income, Before recognition	₩ 163,750	₩ (216,862)	₩ 163,892
Gain (loss) on valuation of hedge instruments (loss) liabilities, Before recognition	(30,168)	(42,510)	6,916
Remeasurements of net defined benefit liabilities, Before recognition	(179,129)	247,162	74,518
Share of Gain (loss) of associates and joint ventures, and others, Before recognition	28,715	(14,931)	(34,909)
Exchange differences on translation for foreign operations, Before recognition	32,376	23,316	683
Gain or loss on disposal of treasury stock, Before recognition	402	(59,308)	(15,657)
Total, Before recognition	15,946	(63,133)	195,443
Gain (loss) on valuation of financial assets at fair value through other comprehensive income, Tax effect	(41,945)	58,288	(34,112)
Gain (loss) on valuation of hedge instruments (loss) liabilities, Tax effect	7,555	11,180	(1,644)
Remeasurements of net defined benefit liabilities, Tax effect	41,664	(65,733)	(18,696)
Share of Gain (loss) of associates and joint ventures, and others, Tax effect	(7,225)	3,748	9,097
Exchange differences on translation for foreign operations, Tax effect	(8,146)	(5,852)	(178)
Gain or loss on disposal of treasury stock, Tax effect	(101)	14,886	4,080
Total, Tax effect	(8,198)	16,517	(41,453)
Gain (loss) on valuation of financial assets at fair value through other comprehensive income, After recognition	121,805	(158,574)	129,780
Gain (loss) on valuation of hedge instruments (loss) liabilities, After recognition	(22,613)	(31,330)	5,272
Remeasurements of net defined benefit liabilities, After recognition	(137,465)	181,429	55,822
Share of Gain (loss) of associates and joint ventures, and others, After recognition	21,490	(11,183)	(25,812)
Exchange differences on translation for foreign operations, After recognition	24,230	17,464	505
Gain or loss on disposal of treasury stock, After recognition	301	(44,422)	(11,577)
Total other comprehensive income	₩ 7,748	₩ (46,616)	₩ 153,990

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Deferred Income Tax and Income Tax Expense - Summary of Details of Income Tax Expense (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Deferred tax assets and liabilities [abstract]
Current income tax expense	₩ 347,265	₩ 335,796	₩ 289,471
Impact of change in deferred taxes	(16,827)	169,961	229,545
Income tax expense	₩ 330,438	₩ 505,757	₩ 519,016

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Deferred Income Tax and Income Tax Expense - Summary of Tax on the Group's Profit Before Tax (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Deferred tax assets and liabilities [abstract]
Profit before income tax expense	₩ 1,302,620	₩ 1,891,392	₩ 1,978,411
Statutory income tax expense	333,530	509,771	533,701
Tax effect
Income not taxable for taxation purposes	(30,106)	(47,550)	(4,307)
Non-deductible expenses	26,723	53,398	20,570
Tax credit	(78,459)	(54,895)	(31,517)
Additional payment of income taxes	(4,991)	11,744	(221)
Adjustments in deferred tax from changes in tax rate	564	(41,545)
Tax effect and adjustment on consolidation
Goodwill impairment	106,010	5,809
Eliminated dividend income form subsidiaries			7,264
Changes of out-side tax effect	4,436	29,922	4,738
Intangible Asset impairment and amortization	5,892	5,276	796
Reversal expenses of contract cost assets	9,281	(4,800)	(2,932)
Acquisition and disposition of businesses	5,564	(8,587)	(5,128)
Others	(42,442)	38,627	(3,948)
Income tax expense	₩ 330,438	₩ 505,757	₩ 519,016

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Deferred Income Tax and Income Tax Expense - Summary of deferred tax assets and liabilities that are not recognized (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deductible temporary differences for which no deferred tax asset is recognised	₩ 4,162,949	₩ 3,876,693
Taxable Temporary Differences For Which No Deferred Tax Asset and Liabilities Is Recognised	1,114,595	1,073,736
Investment in subsidiaries, associates, and joint ventures [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deductible temporary differences for which no deferred tax asset is recognised	3,520,173	3,384,295
Taxable Temporary Differences For Which No Deferred Tax Asset and Liabilities Is Recognised	903,394	857,076
Unused tax loss [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deductible temporary differences for which no deferred tax asset is recognised	203,200	103,326
Unused Tax credit [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deductible temporary differences for which no deferred tax asset is recognised	2,338	1,988
Others [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deductible temporary differences for which no deferred tax asset is recognised	437,238	387,084
Others [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Taxable Temporary Differences For Which No Deferred Tax Asset and Liabilities Is Recognised	₩ 211,201	₩ 216,660

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Deferred Income Tax and Income Tax Expense - Summary of expected period of expiry for unused tax losses not recognized in deferred tax assets (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Unused tax losses for which no deferred tax asset recognised	₩ 203,200	₩ 103,326
2023 [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Unused tax losses for which no deferred tax asset recognised	4,484	72,512
2024 [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Unused tax losses for which no deferred tax asset recognised	2,836	5,011
2025 [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Unused tax losses for which no deferred tax asset recognised	2,086	3,701
2026 [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Unused tax losses for which no deferred tax asset recognised	4,541	2,112
2027 [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Unused tax losses for which no deferred tax asset recognised	2,473	2,534
2028 [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Unused tax losses for which no deferred tax asset recognised	6,533	396
2029 [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Unused tax losses for which no deferred tax asset recognised	743	617
2030 [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Unused tax losses for which no deferred tax asset recognised	713	2,198
2031 [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Unused tax losses for which no deferred tax asset recognised	756	1,360
2032 [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Unused tax losses for which no deferred tax asset recognised	0	7,450
After 2033 [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Unused tax losses for which no deferred tax asset recognised	₩ 178,035	₩ 5,435

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Earnings per Share - Summary of Basic and Diluted Earnings per Share from Operations (Detail) - KRW (₩) ₩ / shares in Units, ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Basic earnings per share [abstract]
Profit attributable to ordinary shares of owners of the Controlling Company (in millions of Korean won)	₩ 993,325	₩ 1,259,686	₩ 1,354,537
Weighted average number of ordinary shares outstanding (in number of shares)	249,470,072	242,235,332	235,201,782
Basic earnings per share (In Korean won)	₩ 3,982	₩ 5,200	₩ 5,759
Profit attributable to ordinary shares of owners of the Controlling Company (In millions of Korean won)	₩ 993,325	₩ 1,259,686	₩ 1,354,537
Adjustment to net income attributable to ordinary shares (in millions of Korean won)	(827)	(496)	0
Diluted profit attributable to ordinary shares (In millions of Korean won)	₩ 992,498	₩ 1,259,190	₩ 1,354,537
Number of dilutive potential ordinary shares outstanding	119,263	91,931	483,760
Weighted average number of ordinary shares outstanding	249,589,335	242,327,263	235,685,542
Diluted earnings per share (In Korean won)	₩ 3,977	₩ 5,196	₩ 5,747

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Dividend - Additional Information (Detail) - KRW (₩) ₩ / shares in Units, ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure of Dividends [abstract]
Dividends paid	₩ 501,844	₩ 450,394	₩ 326,487
Dividends paid per share	₩ 1,960	₩ 1,910	₩ 1,350
Dividends declared	₩ 482,970
Dividends declared per share	₩ 1,960

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Cash Generated from Operations - Summary of Cash Flows from Operating Activities (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash flows from (used in) operating activities [abstract]
Profit for the year	₩ 972,182	₩ 1,385,635	₩ 1,459,395
Adjustments to reconcile net income
Income tax expense	335,367	505,757	519,016
Interest income	(392,580)	(340,794)	(300,900)
Interest expense	410,566	320,914	268,847
Dividends income	(59,758)	(14,121)	(21,525)
Depreciation	2,773,152	2,687,191	2,643,894
Amortization of intangible assets	691,909	627,261	604,744
Depreciation of right-of-use assets	402,737	396,214	398,716
Provision for severance benefits (defined benefits)	196,027	240,506	253,491
Impairment losses on trade receivables	175,244	132,102	105,344
Share of net profit or loss of associates and joint ventures	44,323	16,821	(116,061)
Loss(gain) on disposal of associates and joint ventures	(6,982)	(38,024)	1
Loss(gain) on the disposal of subsidiaries	(28,825)	(216,591)	13,483
Loss(gain) on disposal of right-of-use assets	(1,465)	(978)	8,319
Impairment losses on assets held for sale	0	0	11
Impairment loss on property and equipment and investment in properties	7,871	16,094	2,115
Loss(gain) on disposal of property and equipment and investment in properties	511	(66,317)	17,410
Loss on disposal of intangible assets	3,601	6,393	2,159
Loss on impairment of intangible assets	236,106	30,674	3,747
Loss on foreign currency translation	83,899	157,017	180,921
Gain on valuation and settlement of derivatives, net	(37,249)	(205,381)	(235,130)
Gain on disposal of financial assets at fair value through profit or loss	(2,225)	(2,347)	(29,974)
Loss(Gain) on valuation of financial assets at fair value through profit or loss	13,920	44,833	(64,660)
Loss(gain) on disposal of financial assets at amortized cost	1	3	(35)
Others	158,820	(49,891)	84,625
Change in operating assets and liabilities, net of effects from purchase of controlled entity and sale of engineering division
Decrease(increase) in trade receivables	(124,023)	(43,787)	327,031
Increase in other receivables	(1,085,527)	(1,598,216)	(328,610)
Decrease(increase) in other current assets	250,569	(101,947)	(89,230)
Increase in other non-current assets	(86,030)	(120,054)	(143,087)
Decrease(increase) in inventories	(317,531)	(179,255)	32,798
Increase(decrease) in trade payables	121,515	(368,355)	289,044
Increase in other payables	829,220	1,103,113	207,583
Increase(decrease) in other current liabilities	414,436	(30,375)	107,993
Decrease in other non-current liabilities	(14,272)	(1,015)	(14,915)
Decrease in provisions	(5,083)	(22,115)	(4,668)
Increase(decrease) in deferred revenue	905	(384)	3,696
Decrease(increase) in plan assets	115,725	(90,771)	(114,631)
Payment of post-employment benefits	(329,861)	(343,931)	(241,350)
Cash generated from operations (1+2+3)	₩ 5,747,195	₩ 3,835,879	₩ 5,829,607

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Cash Generated from Operations - Summary of Cash Flows from Operating Activities (Parenthetical) (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure Of Cash Flows From Operating Activities [Line Items]
Interest income	₩ 279,607	₩ 271,925	₩ 273,460
Interest expenses	356,345	293,854	263,389
Gain loss valuation Of financial assets	13,920	44,833	(64,660)
BC Card Co Ltd [Member]
Disclosure Of Cash Flows From Operating Activities [Line Items]
Interest income	112,973	68,869	27,440
Interest expenses	55,677	27,060	5,458
Dividend income	1,759	₩ 2,299	₩ 1,340
KT Estate Inc [Member]
Disclosure Of Cash Flows From Operating Activities [Line Items]
Gains (losses) on disposals of investment properties	49,752
KT Investment Co Ltd [Member]
Disclosure Of Cash Flows From Operating Activities [Line Items]
Gain loss valuation Of financial assets	₩ 11,112

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Cash Generated from Operations - Summary of Significant Transactions not Affecting Cash Flows (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash flows from (used in) operating activities [abstract]
Reclassification of the current portion of borrowings	₩ 1,731,998	₩ 1,004,818	₩ 1,303,543
Reclassification of construction-in-progress to property and equipment	3,123,611	3,167,965	2,916,888
Reclassification of accounts payable from property and equipment	(293,448)	(7,055)	(149,512)
Reclassification of accounts payable from intangible assets	(276,491)	(197,389)	524,040
Reclassification of payable from defined benefit liabilities	26,246	(32,417)	69,415
Reclassification of payable from plan assets	₩ (24,821)	28,532	₩ (60,320)
Disposal of treasury stock related to acquisition of financial assets		747,161
Acquisition of financial assets related to disposal of a subsidiary		₩ 250,000

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Changes in Liabilities Arising from Financing Activities - Summary of Changes in Liabilities Arising from Financial Activities (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure of reconciliation of liabilities arising from financing activities [line items]
Beginning	₩ 11,021,448	₩ 9,572,795	₩ 8,582,905
Cash flows	(252,750)	1,047,720	504,331
Newly acquired	460,617	426,644	458,870
Changes in FX rate	88,745	18,805	2,882
Fair value change	13,174	44,221	(22,053)
Acquisition and disposition of businesses	0	0	52,834
Others	(67,824)	(88,737)	(6,974)
Ending	11,263,410	11,021,448	9,572,795
Borrowings [member]
Disclosure of reconciliation of liabilities arising from financing activities [line items]
Beginning	10,006,685	8,437,703	7,316,298
Cash flows	106,118	1,391,321	900,394
Newly acquired	0	0	52,782
Changes in FX rate	45,370	146,108	196,890
Fair value change	1,719	939
Acquisition and disposition of businesses	0	0	15,994
Others	58,273	30,614	(44,655)
Ending	10,218,165	10,006,685	8,437,703
Lease liabilities [member]
Disclosure of reconciliation of liabilities arising from financing activities [line items]
Beginning	1,172,038	1,159,369	1,143,640
Cash flows	(407,051)	(378,684)	(394,567)
Newly acquired	460,617	427,398	403,451
Changes in FX rate	0	0	3
Fair value change	24	0	90
Acquisition and disposition of businesses	0	0	36,840
Others	(45,719)	(36,045)	(30,088)
Ending	1,179,909	1,172,038	1,159,369
Derivative liabilities [member]
Disclosure of reconciliation of liabilities arising from financing activities [line items]
Beginning	33,555	75,176	130,573
Cash flows	0	(41,197)	(1,712)
Newly acquired	0	0	2,637
Changes in FX rate	10,888	19,858	(4,311)
Fair value change	9,643	12,941	(4,892)
Acquisition and disposition of businesses	0	0	0
Others	(29,539)	(33,223)	(47,119)
Ending	24,547	33,555	75,176
Derivative assets [member]
Disclosure of reconciliation of liabilities arising from financing activities [line items]
Beginning	(190,830)	(99,453)	(7,606)
Cash flows	48,183	76,280	216
Newly acquired	0	(754)	0
Changes in FX rate	32,487	(147,161)	(189,700)
Fair value change	1,788	30,341	(17,251)
Acquisition and disposition of businesses	0	0	0
Others	(50,839)	(50,083)	114,888
Ending	₩ (159,211)	₩ (190,830)	₩ (99,453)

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Segment Information - Summary of Segment Information (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure of operating segments [Line Items]
Operating revenues	₩ 26,595,245	₩ 26,234,206	₩ 25,205,659
Operating income (loss)	1,428,449	1,968,157	1,699,397
Depreciation and Amortization	3,810,131	3,655,879	3,607,638
Operating segments [member]
Disclosure of operating segments [Line Items]
Operating revenues	31,782,093	31,456,833	29,737,242
Operating income (loss)	1,385,818	2,073,417	1,755,230
Depreciation and Amortization	3,928,820	3,852,350	3,712,507
Operating segments [member] | ICT [member]
Disclosure of operating segments [Line Items]
Operating revenues	18,698,964	18,697,269	18,734,342
Operating income (loss)	1,193,333	1,347,405	1,170,920
Depreciation and Amortization	3,183,408	3,105,807	3,217,643
Operating segments [member] | Finance [member]
Disclosure of operating segments [Line Items]
Operating revenues	3,723,286	3,615,307	3,526,743
Operating income (loss)	91,591	119,805	104,511
Depreciation and Amortization	37,150	47,638	46,223
Operating segments [member] | Satellite TV [member]
Disclosure of operating segments [Line Items]
Operating revenues	714,574	709,160	665,081
Operating income (loss)	(70,170)	19,797	61,398
Depreciation and Amortization	52,871	58,413	60,980
Operating segments [member] | Real estate [Member]
Disclosure of operating segments [Line Items]
Operating revenues	499,997	474,954	336,218
Operating income (loss)	73,496	113,134	27,498
Depreciation and Amortization	70,653	65,457	60,459
Operating segments [member] | Others [member]
Disclosure of operating segments [Line Items]
Operating revenues	8,145,272	7,960,143	6,474,858
Operating income (loss)	97,568	473,276	390,903
Depreciation and Amortization	584,738	575,035	327,202
Elimination [member]
Disclosure of operating segments [Line Items]
Operating revenues	(5,186,848)	(5,222,627)	(4,531,583)
Operating income (loss)	42,631	(105,260)	(55,833)
Depreciation and Amortization	₩ (118,689)	₩ (196,471)	₩ (104,869)

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Segment Information - Summary of Operating Revenues and Non Current Assets by Geographical Regions (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure of geographical areas [Line Items]
Operating revenues	₩ 26,595,245	₩ 26,234,206	₩ 25,205,659
Non-current assets	20,909,038	21,115,704
Domestic [member]
Disclosure of geographical areas [Line Items]
Operating revenues	26,425,735	26,074,349	25,114,719
Non-current assets	20,725,694	20,845,214
Overseas [member]
Disclosure of geographical areas [Line Items]
Operating revenues	169,510	159,857	₩ 90,940
Non-current assets	₩ 183,344	₩ 270,490

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Related Party Transactions - Summary of Related Parties Outstanding Balances of Receivables and Payables (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022
Trade receivables [member]
Disclosure of transactions between related parties [line items]
Receviables	₩ 7,824	₩ 4,572
Trade receivables [member] | K Bank Inc.[Member]
Disclosure of transactions between related parties [line items]
Receviables	862	682
Trade receivables [member] | Little Big Pictures [Member]
Disclosure of transactions between related parties [line items]
Receviables	232	1,454
Trade receivables [member] | K-Realty 11th Real Estate Investment Trust Company [Member]
Disclosure of transactions between related parties [line items]
Receviables	110	151
Trade receivables [member] | KRealty No.3 Real Estate General Private Placement Investment Company [Member]
Disclosure of transactions between related parties [line items]
Receviables	4,576
Trade receivables [member] | Others [member]
Disclosure of transactions between related parties [line items]
Receviables	2,044	2,285
Other Receivables [member]
Disclosure of transactions between related parties [line items]
Receviables	330,924	267,929
Other Receivables [member] | K Bank Inc.[Member]
Disclosure of transactions between related parties [line items]
Receviables	326,006	258,999
Other Receivables [member] | Little Big Pictures [Member]
Disclosure of transactions between related parties [line items]
Receviables	3,473	7,645
Other Receivables [member] | K-Realty 11th Real Estate Investment Trust Company [Member]
Disclosure of transactions between related parties [line items]
Receviables	1,283	1,283
Other Receivables [member] | Others [member]
Disclosure of transactions between related parties [line items]
Receviables	162	2
Lease receivables [member]
Disclosure of transactions between related parties [line items]
Receviables	769
Lease receivables [member] | K Bank Inc.[Member]
Disclosure of transactions between related parties [line items]
Receviables	769
Trade payables [member]
Disclosure of transactions between related parties [line items]
Payables	2,909	3,235
Trade payables [member] | Little Big Pictures [Member]
Disclosure of transactions between related parties [line items]
Payables	9
Trade payables [member] | Others [member]
Disclosure of transactions between related parties [line items]
Payables	2,900	3,235
Other payables [member]
Disclosure of transactions between related parties [line items]
Payables	3,334	3,240
Other payables [member] | K Bank Inc.[Member]
Disclosure of transactions between related parties [line items]
Payables	299	299
Other payables [member] | Little Big Pictures [Member]
Disclosure of transactions between related parties [line items]
Payables	6	9
Other payables [member] | Others [member]
Disclosure of transactions between related parties [line items]
Payables	3,029	2,932
Lease liabilities [member]
Disclosure of transactions between related parties [line items]
Payables	6,732	₩ 8,824
Lease liabilities [member] | K-Realty 11th Real Estate Investment Trust Company [Member]
Disclosure of transactions between related parties [line items]
Payables	₩ 6,732

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Related Party Transactions - Summary of Significant Transactions with Related Parties (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure of transactions between related parties [line items]
Operating Revenue	₩ 50,650	₩ 41,925	₩ 296,186
Purchases	58,339	54,222	37,774
K-Realty CR-REITs No.1 [member]
Disclosure of transactions between related parties [line items]
Operating Revenue			238,847
Purchases			1,308
HD Hyundai Robotics Co., Ltd.(formerly Hyundai Robotics Co., Ltd.) [member]
Disclosure of transactions between related parties [line items]
Operating Revenue	78
Purchases	182
K-Realty 11th Real Estate Investment Trust Company [Member]
Disclosure of transactions between related parties [line items]
Operating Revenue	346	330
Purchases	2,559	1,674
K-Realty 11th Real Estate Investment Trust Company [member]
Disclosure of transactions between related parties [line items]
Operating Revenue	6,216
Others [member]
Disclosure of transactions between related parties [line items]
Operating Revenue	21,308	11,964	28,092
Purchases	42,169	37,742	21,302
Digital Pharm Co., Ltd [Member]
Disclosure of transactions between related parties [line items]
Operating Revenue	1	1
K Bank [member]
Disclosure of transactions between related parties [line items]
Operating Revenue	22,701	29,536	24,247
Purchases	₩ 13,429	11,007	15,164
IGIS Professional Investors Private Investment Real Estate Investment LLC No.395 [Member]
Disclosure of transactions between related parties [line items]
Operating Revenue			₩ 5,000
Hyundai Robotics Co., Ltd [Member]
Disclosure of transactions between related parties [line items]
Operating Revenue		94
Purchases		₩ 3,799

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Related Party Transactions - Summary of Key Management Compensation (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure of transactions between related parties [abstract]
Salaries and other short-term benefits	₩ 1,494	₩ 1,855	₩ 2,189
Post-employment benefits	153	294	412
Share-based compensation	569	976	669
Total	₩ 2,216	₩ 3,125	₩ 3,270

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Related Party Transactions - Summary of Transactions Prior Liquidation (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Acquisition of right of use assets [member]
Statement [Line Items]
Dividend Income	₩ 7	₩ 1,966
Acquisition of right of use assets [member] | HD Hyundai Robotics Co., Ltd.(formerly Hyundai Robotics Co., Ltd.) [member]
Statement [Line Items]
Dividend Income	0
Acquisition of right of use assets [member] | K-Realty 11th Real Estate Investment Trust Company [Member]
Statement [Line Items]
Dividend Income	7	1,966
Interest income [member]
Statement [Line Items]
Dividend Income	8,264	3,052	₩ 223
Interest income [member] | Korea Information & Technology Investment Fund (KIF Investment Fund) [member]
Statement [Line Items]
Dividend Income			223
Interest income [member] | K Bank Inc.[Member]
Statement [Line Items]
Dividend Income	8,264	3,052
Interest Expense [member]
Statement [Line Items]
Payables	261	260	205
Interest Expense [member] | K-Realty CR-REITs No.1 [member]
Statement [Line Items]
Payables			205
Interest Expense [member] | K-Realty 11th Real Estate Investment Trust Company [Member]
Statement [Line Items]
Payables	261	260
Dividend Income [member]
Statement [Line Items]
Dividend Income	1,786	54,869	48,779
Dividend Income [member] | K-Realty CR-REITs No.1 [member]
Statement [Line Items]
Dividend Income		45,549	40,142
Dividend Income [member] | K-Realty 11th Real Estate Investment Trust Company [Member]
Statement [Line Items]
Dividend Income	507	162
Dividend Income [member] | Others [member]
Statement [Line Items]
Dividend Income	₩ 1,279	₩ 9,158	₩ 8,637

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Related Party Transactions - Summary of Fund Transactions with Related Parties (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure of transactions between related parties [line items]
Equity contributions in cash	₩ 122,535	₩ 278,138	₩ 462,888
Borrowings		31,916
Repayments	1,037	771	15,964
K-REALTY CR-REIT [member]
Disclosure of transactions between related parties [line items]
Repayments			15,964
K Bank Inc.[Member]
Disclosure of transactions between related parties [line items]
Equity contributions in cash			424,957
Pacific Professional Investors Private Investment Real Estate Investment LLC No.55 [Member]
Disclosure of transactions between related parties [line items]
Equity contributions in cash			11,000
KT Young Entrepreneurs DNA Investment Fund [Member]
Disclosure of transactions between related parties [line items]
Equity contributions in cash			8,400
Mastern KT MultiFamily Real Estate Private Equity Investment Fund 1 [Member]
Disclosure of transactions between related parties [line items]
Equity contributions in cash			6,055
KT-IBKC future investment fund [member]
Disclosure of transactions between related parties [line items]
Equity contributions in cash			(5,700)
Megazone Cloud Corporation [Member]
Disclosure of transactions between related parties [line items]
Equity contributions in cash		130,001
Borrowings		30,000
IBK KT Emerging Digital Industry Investment Fund [Member]
Disclosure of transactions between related parties [line items]
Equity contributions in cash		10,800
Mastern KT MultiFamily Real Estate Private Equity Investment Fund [Member]
Disclosure of transactions between related parties [line items]
Equity contributions in cash		18,859
IGIS No. 4681 General Private Real Estate Investment Company [Member]
Disclosure of transactions between related parties [line items]
Equity contributions in cash		25,000
K-Realty 11th Real Estate Investment Trust Company [Member]
Disclosure of transactions between related parties [line items]
Borrowings		1,916
Repayments	1,037	771
STIC Place General Private Placement Real Estate Investment Trust No.2 [Member]
Disclosure of transactions between related parties [line items]
Equity contributions in cash	20,000
Telco Credit Bureau Co.,Ltd. [Member]
Disclosure of transactions between related parties [line items]
Equity contributions in cash	6,500
Pacific geumto no.75 private hybrid asset fund [Member]
Disclosure of transactions between related parties [line items]
Equity contributions in cash	19,000
Kiamco Data Center Blind Fund [Member]
Disclosure of transactions between related parties [line items]
Equity contributions in cash	15,000
STIC Mixed Asset Investment Trust No.1 [Member]
Disclosure of transactions between related parties [line items]
Equity contributions in cash	10,930
Other [member]
Disclosure of transactions between related parties [line items]
Equity contributions in cash	31,107	₩ 93,478	₩ 18,176
Rebellions Co.,Ltd. [Member]
Disclosure of transactions between related parties [line items]
Equity contributions in cash	₩ 19,998

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Related Party Transactions - Additional Information (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022
Kiamco Data Center Blind Fund [Member]
Disclosure of transactions between related parties [line items]
Investment in related party	₩ 107,774
K Bank Inc. [Member]
Disclosure of transactions between related parties [line items]
Credit card contract threshold limit	₩ 1,050	₩ 1,000

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Financial Risk Management - Summary of Exposures to Risks, Effects on Profit before Income Tax and Shareholders' Equity (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
10% strengthening in foreign exchange rate [member]
Disclosure of detailed information about financial instruments [line items]
Fluctuation of foreign exchange rate	10.00%	10.00%	10.00%
Impact on profit before income tax	₩ (10,313)	₩ (5,841)	₩ (3,433)
Impact on equity	₩ (18,460)	₩ (15,836)	₩ 8,692
10% weakening in foreign exchange rate [member]
Disclosure of detailed information about financial instruments [line items]
Fluctuation of foreign exchange rate	10.00%	10.00%	10.00%
Impact on profit before income tax	₩ 10,313	₩ 5,841	₩ 3,433
Impact on equity	₩ 18,460	₩ 15,836	₩ (8,692)
10% percentage increase in market equity price [member]
Disclosure of detailed information about financial instruments [line items]
Fluctuation of price	10.00%	10.00%	10.00%
Impact on profit before income tax	₩ 1,473	₩ 2,660	₩ 2,000
Impact on equity	₩ 121,423	₩ 113,948	₩ 4,588
10% decrease in market equity price [member]
Disclosure of detailed information about financial instruments [line items]
Fluctuation of price	10.00%	10.00%	10.00%
Impact on profit before income tax	₩ (1,473)	₩ (2,660)	₩ (2,000)
Impact on equity	₩ (121,423)	₩ (113,948)	₩ (4,588)
100 basis point increase in market interest rate [Member]
Disclosure of detailed information about financial instruments [line items]
Fluctuation of interest rate	1.00%	1.00%	1.00%
Impact on profit before income tax	₩ (2,693)	₩ 635	₩ 753
Impact on equity	₩ (4,718)	₩ (2,045)	₩ 5,549
100 basis point decrease in market interest rate [Member]
Disclosure of detailed information about financial instruments [line items]
Fluctuation of interest rate	1.00%	1.00%	1.00%
Impact on profit before income tax	₩ 2,696	₩ (669)	₩ (731)
Impact on equity	₩ 5,037	₩ 2,100	₩ (5,675)

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Financial Risk Management - Summary of Details of Financial Assets and Liabilities in Foreign Currencies (Detail) € in Thousands, ₫ in Thousands, ₨ in Thousands, ฿ in Thousands, лв in Thousands, ¥ in Thousands, £ in Thousands, XDR in Thousands, Tsh in Thousands, SFr in Thousands, RM in Thousands, P in Thousands, FRw in Thousands, $ in Thousands, $ in Thousands, $ in Thousands, $ in Thousands, ₩ in Millions	Dec. 31, 2023 USD ($)	Dec. 31, 2023 XDR	Dec. 31, 2023 JPY (¥)	Dec. 31, 2023 EUR (€)	Dec. 31, 2023 RWF (FRw)	Dec. 31, 2023 THB (฿)	Dec. 31, 2023 TZS (Tsh)	Dec. 31, 2023 BWP (P)	Dec. 31, 2023 VND (₫)	Dec. 31, 2023 SGD ($)	Dec. 31, 2023 TWD ($)	Dec. 31, 2023 CHF (SFr)	Dec. 31, 2023 PKR (₨)	Dec. 31, 2023 KRW (₩)	Dec. 31, 2022 USD ($)	Dec. 31, 2022 XDR	Dec. 31, 2022 JPY (¥)	Dec. 31, 2022 GBP (£)	Dec. 31, 2022 EUR (€)	Dec. 31, 2022 RWF (FRw)	Dec. 31, 2022 THB (฿)	Dec. 31, 2022 TZS (Tsh)	Dec. 31, 2022 BWP (P)	Dec. 31, 2022 HKD ($)	Dec. 31, 2022 VND (₫)	Dec. 31, 2022 SGD ($)	Dec. 31, 2022 MYR (RM)	Dec. 31, 2022 BGN (лв)	Dec. 31, 2022 KRW (₩)	Dec. 31, 2021 USD ($)	Dec. 31, 2021 XDR	Dec. 31, 2021 JPY (¥)	Dec. 31, 2021 GBP (£)	Dec. 31, 2021 EUR (€)	Dec. 31, 2021 RWF (FRw)	Dec. 31, 2021 THB (฿)	Dec. 31, 2021 TZS (Tsh)	Dec. 31, 2021 BWP (P)	Dec. 31, 2021 HKD ($)	Dec. 31, 2021 VND (₫)	Dec. 31, 2021 SGD ($)	Dec. 31, 2021 TWD ($)	Dec. 31, 2021 CHF (SFr)
Disclosure of detailed information about financial instruments [line items]
Financial assets														₩ 15,486,942															₩ 13,766,638
Financial liabilities														₩ 19,611,825															₩ 18,825,390
Currency risk [Member]
Disclosure of detailed information about financial instruments [line items]
Financial assets	$ 139,807	XDR 254	¥ 17,496	€ 304	FRw 402	฿ 244	Tsh 21,958	P 680	₫ 380,629	$ 1,375	$ 1,685		₨ 114,025		$ 106,426	XDR 255	¥ 32,801	£ 30	€ 185	FRw 15,521	฿ 265	Tsh 1,464	P 183	$ 37	₫ 280,226	$ 448	RM 1	лв 62		$ 245,759	XDR 255	¥ 29,227		€ 3,943	FRw 586	฿ 2,160	Tsh 1,644	P 93		₫ 257,895	$ 13
Financial liabilities	$ 2,271,673	XDR 722	¥ 400,002	€ 7,810								SFr 25			$ 2,336,607	XDR 722	¥ 400,002	£ 83	€ 7,832	FRw 13,025						$ 284,000				$ 2,302,642	XDR 722	¥ 30,000,763	£ 1,005	€ 10,801					$ 105		$ 284,000	$ 226	SFr 161

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Financial Risk Management - Summary of Maximum Exposure to Credit Risk (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022
Disclosure of detailed information about financial instruments [line items]
Maximum exposure to credit risk	₩ 14,707,856	₩ 13,027,594
Cash and cash equivalents (except for cash on hand) [member]
Disclosure of detailed information about financial instruments [line items]
Maximum exposure to credit risk	2,869,285	2,437,629
Financial assets at amortized costs [member]
Disclosure of detailed information about financial instruments [line items]
Maximum exposure to credit risk	8,458,259	7,459,994
Financial assets at fair value through other comprehensive income [member]
Disclosure of detailed information about financial instruments [line items]
Maximum exposure to credit risk	116,198	129,124
Contract assets [member]
Disclosure of detailed information about financial instruments [line items]
Maximum exposure to credit risk	832,520	802,253
Derivatives financial assets for hedging [member]
Disclosure of detailed information about financial instruments [line items]
Maximum exposure to credit risk	159,211	190,830
Financial assets at fair value through profit or loss [member]
Disclosure of detailed information about financial instruments [line items]
Maximum exposure to credit risk	880,549	942,274
Financial assets at fair value through other comprehensive income [member]
Disclosure of detailed information about financial instruments [line items]
Maximum exposure to credit risk	5,913	5,432
Financial assets at amortized costs [member]
Disclosure of detailed information about financial instruments [line items]
Maximum exposure to credit risk	₩ 1,385,921	₩ 1,060,058

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Financial Risk Management - Summary of Expected Credit Losses Reflect Forward-Looking Information (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022
Disclosure of provision matrix [line items]
Expected credit loss rate	0.00%	0.00%
Financial assets	₩ 15,486,942	₩ 13,766,638
Less than 6 months [member]
Disclosure of provision matrix [line items]
Expected credit loss rate	5.43%	5.57%
7-12 months [member]
Disclosure of provision matrix [line items]
Expected credit loss rate	21.72%	25.84%
More than 1 years [member]
Disclosure of provision matrix [line items]
Expected credit loss rate	54.55%	67.16%
Carrying amounts [member]
Disclosure of provision matrix [line items]
Financial assets	₩ 3,770,489	₩ 3,700,050
Carrying amounts [member] | Less than 6 months [member]
Disclosure of provision matrix [line items]
Financial assets	3,466,588	3,443,163
Carrying amounts [member] | 7-12 months [member]
Disclosure of provision matrix [line items]
Financial assets	68,772	49,491
Carrying amounts [member] | More than 1 years [member]
Disclosure of provision matrix [line items]
Financial assets	235,129	207,396
Provision for impairment [member]
Disclosure of provision matrix [line items]
Financial assets	(331,290)	(343,738)
Provision for impairment [member] | Less than 6 months [member]
Disclosure of provision matrix [line items]
Financial assets	(188,086)	(191,668)
Provision for impairment [member] | 7-12 months [member]
Disclosure of provision matrix [line items]
Financial assets	(14,940)	(12,789)
Provision for impairment [member] | More than 1 years [member]
Disclosure of provision matrix [line items]
Financial assets	₩ (128,264)	₩ (139,281)

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Financial Risk Management - Summary of Details of Changes in Provisions for Impairment of Trade Receivables and Other Financial Assets at Amortized Costs (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Trade receivables [member]
Disclosure of financial assets [line items]
Beginning balance	₩ 343,738	₩ 349,725
Provision	69,972	64,522
Written-off	(80,126)	(68,298)
Others	(2,294)	(2,211)
Ending balance	331,290	343,738
Financial assets at amortised cost, class [member]
Disclosure of financial assets [line items]
Beginning balance	218,543	201,387
Provision	114,501	65,941
Written-off	(150,014)	(51,383)
Others	15,547	3,448
Reversal	(14,941)	(850)
Ending balance	₩ 183,636	₩ 218,543

XML

Financial Risk Management - Summary of Impairment of Trade Receivable (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Trade receivables [member]
Disclosure of impairment loss and reversal of impairment loss [line items]
Impairment loss Bad debt expenses	₩ 69,972	₩ 64,522

XML

Financial Risk Management - Summary of Contractual Undiscounted Cash Flows (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items]
Trade and other payables	₩ 8,922,416	₩ 8,483,110
Borrowings (including debentures)	10,693,722	11,016,756
Lease liabilities	1,340,166	1,336,761
Other non-derivative financial liabilities	1,130,037	336,178
Financial guarantee contracts	116,719	26,206
Total	22,203,060	21,199,011
Less than 1 year [member]
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items]
Trade and other payables	8,184,036	7,386,703
Borrowings (including debentures)	2,922,557	2,028,207
Lease liabilities	313,431	313,162
Other non-derivative financial liabilities	372,743	33,279
Financial guarantee contracts	13,719	21,618
Total	11,806,486	9,782,969
1-5 years [member]
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items]
Trade and other payables	730,340	1,009,559
Borrowings (including debentures)	6,027,323	6,972,077
Lease liabilities	617,561	615,766
Other non-derivative financial liabilities	747,221	209,155
Financial guarantee contracts	103,000
Total	8,225,445	8,806,557
More than 5 years [member]
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items]
Trade and other payables	8,040	86,848
Borrowings (including debentures)	1,743,842	2,016,472
Lease liabilities	409,174	407,833
Other non-derivative financial liabilities	10,073	93,744
Financial guarantee contracts	0	4,588
Total	₩ 2,171,129	₩ 2,609,485

XML

Financial Risk Management - Summary of Cash Outflow and Inflow of Derivatives Settled Gross or Net are Undiscounted Contractual Cash Flow (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Derivatives held for trading
Outflows	₩ 133,293	₩ 102,924	₩ 158,284
Inflow	1,015
Derivatives settled gross
Outflow	1,976,432	2,994,649	3,078,733
Inflow	2,849,368	3,258,353	3,167,878
Less than 1 year [member]
Derivatives held for trading
Outflows	0	0	0
Inflow	0
Derivatives settled gross
Outflow	741,140	472,005	843,489
Inflow	614,066	550,478	856,508
1-5 years [member]
Derivatives held for trading
Outflows	133,293	101,994	158,284
Inflow	0
Derivatives settled gross
Outflow	1,227,166	2,493,858	1,857,942
Inflow	2,198,958	2,670,002	1,917,236
More than 5 years [member]
Derivatives held for trading
Outflows	0	930	0
Inflow	1,015
Derivatives settled gross
Outflow	8,126	28,786	377,302
Inflow	₩ 36,344	₩ 37,873	₩ 394,134

XML

Financial Risk Management - Summary of Debt-to-equity Ratios (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Disclosure of detailed information about financial instruments [abstract]
Total liabilities	₩ 24,249,073	₩ 22,577,114
Total equity	₩ 18,542,575	₩ 18,412,696	₩ 16,567,161	₩ 15,551,433
Debt-to-equity ratio	131.00%	123.00%

XML

Financial Risk Management - Summary of Gearing Ratios (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Disclosure of detailed information about financial instruments [abstract]
Total borrowings	₩ 10,218,165	₩ 10,006,685
Less: cash and cash equivalents	(2,879,554)	(2,449,062)	₩ (3,019,592)	₩ (2,634,624)
Net debt	7,338,611	7,557,623
Total equity	18,542,575	18,412,696	₩ 16,567,161	₩ 15,551,433
Total capital	₩ 25,881,186	₩ 25,970,319
Gearing ratio	28.00%	29.00%

XML

Financial Risk Management - Summary of Group's Recognized Financial Assets Subject to Enforceable Master Netting Arrangements or Similar Agreements (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022
Disclosure of offsetting of financial assets [line items]
Gross assets	₩ 79,174	₩ 61,276
Gross liabilities offset	(2,164)	(764)
Net amounts presented in the statement of financial position	77,010	65,012
Amounts not offset, Financial instruments	(59,150)	(44,518)
Net amount	17,860	15,994
Trade receivables [member]
Disclosure of offsetting of financial assets [line items]
Gross assets	78,415	60,512
Gross liabilities offset	(1,407)
Net amounts presented in the statement of financial position	77,008	60,512
Amounts not offset, Financial instruments	(59,148)	(44,518)
Net amount	17,860	15,994
Other financial assets [Member]
Disclosure of offsetting of financial assets [line items]
Gross assets	759	764
Gross liabilities offset	(757)	₩ (764)
Net amounts presented in the statement of financial position	2
Amounts not offset, Financial instruments	₩ (2)

XML

Financial Risk Management - Summary of Group's Recognized Financial Liabilities Subject to Enforceable Master Netting Arrangements or Similar Agreements (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022
Disclosure of offsetting of financial liabilities [Line Items]
Gross liabilities	₩ 63,964
Gross assets offset	(2,164)
Net amounts presented in the statement of financial position	61,800
Amounts not offset, Financial instruments	(59,151)
Net amount	2,649
Trade payables [member]
Disclosure of offsetting of financial liabilities [Line Items]
Gross liabilities	59,602	₩ 47,271
Gross assets offset	(757)	(764)
Net amounts presented in the statement of financial position	58,845	46,507
Amounts not offset, Financial instruments	(56,196)	(44,518)
Net amount	2,649	₩ 1,989
Other [member]
Disclosure of offsetting of financial liabilities [Line Items]
Gross liabilities	4,362
Gross assets offset	(1,407)
Net amounts presented in the statement of financial position	2,955
Amounts not offset, Financial instruments	₩ (2,955)

XML

Financial Risk Management - Additional Information (Detail) $ in Thousands, ₩ in Millions	Dec. 31, 2023 KRW (₩)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 KRW (₩)
Disclosure of detailed information about financial instruments [line items]
Maximum exposure to credit risk	₩ 14,707,856		₩ 13,027,594
Maximum exposure to credit risk of loans or receivables	3,439,199		3,356,312
Financial guarantee contracts [member]
Disclosure of detailed information about financial instruments [line items]
Maximum exposure to credit risk	116,719		₩ 26,206
Kiamco Data Center Blind Fund [Member]
Disclosure of detailed information about financial instruments [line items]
Investment In Related Party	107,774
Future Innovation Private Equity Fund No.3 [Member]
Disclosure of detailed information about financial instruments [line items]
Amounts payable, related party transactions	₩ 4,132	$ 30,350

XML

Fair Value - Summary of Carrying Amount and Fair Value of Financial Instruments by Category (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022
Disclosure of detailed information about financial instruments [line items]
Financial assets	₩ 15,486,942	₩ 13,766,638
Financial liabilities	19,611,825	18,825,390
Trade and other payables [member]
Disclosure of detailed information about financial instruments [line items]
Financial liabilities	8,317,822	8,397,264
Borrowings [member]
Disclosure of detailed information about financial instruments [line items]
Financial liabilities	10,218,165	10,006,685
Financial liabilities at amortized cost [member]
Disclosure of detailed information about financial instruments [line items]
Financial liabilities	915,185	246,606
Financial liabilities at fair value through profit or loss [member]
Disclosure of detailed information about financial instruments [line items]
Financial liabilities	136,106	141,280
Derivative financial liabilities for hedging purpose [member]
Disclosure of detailed information about financial instruments [line items]
Financial liabilities	24,547	33,555
Cash and cash equivalents [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets	2,879,554	2,449,062
Financial assets at amortized costs [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets	8,326,229	7,364,516
Financial assets at fair value through other comprehensive income [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets	116,198	129,124
Other financial assets at amortized costs [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets	1,385,921	1,060,058
Financial assets at fair value through profit or loss [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets	939,661	1,064,856
Other financial assets at fair value through other comprehensive income [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets	1,680,168	1,508,192
Derivative financial assets for hedging [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets	159,211	190,830
Fair value [member] | Trade and other payables [member]
Disclosure of detailed information about financial instruments [line items]
Financial liabilities	1	1
Fair value [member] | Borrowings [member]
Disclosure of detailed information about financial instruments [line items]
Financial liabilities	9,979,545	9,405,992
Fair value [member] | Financial liabilities at amortized cost [member]
Disclosure of detailed information about financial instruments [line items]
Financial liabilities	1	1
Fair value [member] | Financial liabilities at fair value through profit or loss [member]
Disclosure of detailed information about financial instruments [line items]
Financial liabilities	136,106	141,280
Fair value [member] | Derivative financial liabilities for hedging purpose [member]
Disclosure of detailed information about financial instruments [line items]
Financial liabilities	24,547	33,555
Fair value [member] | Cash and cash equivalents [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets	1	1
Fair value [member] | Financial assets at amortized costs [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets	1	1
Fair value [member] | Financial assets at fair value through other comprehensive income [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets	116,198	129,124
Fair value [member] | Other financial assets at amortized costs [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets	1	1
Fair value [member] | Financial assets at fair value through profit or loss [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets	939,661	1,064,856
Fair value [member] | Other financial assets at fair value through other comprehensive income [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets	1,680,168	1,508,192
Fair value [member] | Derivative financial assets for hedging [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets	₩ 159,211	₩ 190,830

XML

Fair Value - Summary of Fair Value Non of Financial Instruments (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022
Disclosure of detailed information about financial instruments [line items]
Non financial assets	₩ 8,171,407	₩ 8,263,049
Non financial liabilities	10,140,198	9,580,827
Level 1 [Member]
Disclosure of detailed information about financial instruments [line items]
Non financial assets	1,244,847	1,032,547
Level 2 [Member]
Disclosure of detailed information about financial instruments [line items]
Non financial assets	437,533	750,144
Non financial liabilities	10,005,637	9,439,547
Level 3 [Member]
Disclosure of detailed information about financial instruments [line items]
Non financial assets	6,489,027	6,480,358
Non financial liabilities	134,561	141,280
Financial assets at fair value through other comprehensive income [member]
Disclosure of detailed information about financial instruments [line items]
Non financial assets	116,198	129,124
Financial assets at fair value through other comprehensive income [member] | Level 1 [Member]
Disclosure of detailed information about financial instruments [line items]
Non financial assets	0
Financial assets at fair value through other comprehensive income [member] | Level 2 [Member]
Disclosure of detailed information about financial instruments [line items]
Non financial assets	116,198	129,124
Financial assets at fair value through other comprehensive income [member] | Level 3 [Member]
Disclosure of detailed information about financial instruments [line items]
Non financial assets	0
Financial assets at fair value through profit or loss [member]
Disclosure of detailed information about financial instruments [line items]
Non financial assets	939,661	1,064,856
Financial assets at fair value through profit or loss [member] | Level 1 [Member]
Disclosure of detailed information about financial instruments [line items]
Non financial assets	13,911	26,647
Financial assets at fair value through profit or loss [member] | Level 2 [Member]
Disclosure of detailed information about financial instruments [line items]
Non financial assets	156,918	426,140
Financial assets at fair value through profit or loss [member] | Level 3 [Member]
Disclosure of detailed information about financial instruments [line items]
Non financial assets	768,832	612,069
Other financial assets at fair value through other comprehensive income [member]
Disclosure of detailed information about financial instruments [line items]
Non financial assets	1,680,168	1,508,192
Other financial assets at fair value through other comprehensive income [member] | Level 1 [Member]
Disclosure of detailed information about financial instruments [line items]
Non financial assets	1,230,936	1,005,900
Other financial assets at fair value through other comprehensive income [member] | Level 2 [Member]
Disclosure of detailed information about financial instruments [line items]
Non financial assets	5,206	5,163
Other financial assets at fair value through other comprehensive income [member] | Level 3 [Member]
Disclosure of detailed information about financial instruments [line items]
Non financial assets	444,026	497,129
Derivative financial assets for hedging [member]
Disclosure of detailed information about financial instruments [line items]
Non financial assets	159,211	190,830
Derivative financial assets for hedging [member] | Level 2 [Member]
Disclosure of detailed information about financial instruments [line items]
Non financial assets	159,211	189,717
Derivative financial assets for hedging [member] | Level 3 [Member]
Disclosure of detailed information about financial instruments [line items]
Non financial assets	0	1,113
Investment Properties [member]
Disclosure of detailed information about financial instruments [line items]
Non financial assets	5,276,169	5,370,047
Investment Properties [member] | Level 3 [Member]
Disclosure of detailed information about financial instruments [line items]
Non financial assets	5,276,169	5,370,047
Borrowings [Member]
Disclosure of detailed information about financial instruments [line items]
Non financial liabilities	9,979,545	9,405,992
Borrowings [Member] | Level 2 [Member]
Disclosure of detailed information about financial instruments [line items]
Non financial liabilities	9,979,545	9,405,992
Other financial liabilities at fair value through profit or loss [member]
Disclosure of detailed information about financial instruments [line items]
Non financial liabilities	136,106	141,280
Other financial liabilities at fair value through profit or loss [member] | Level 2 [Member]
Disclosure of detailed information about financial instruments [line items]
Non financial liabilities	1,545	0
Other financial liabilities at fair value through profit or loss [member] | Level 3 [Member]
Disclosure of detailed information about financial instruments [line items]
Non financial liabilities	134,561	141,280
Derivative financial liabilities for hedging purpose [member]
Disclosure of detailed information about financial instruments [line items]
Non financial liabilities	24,547	33,555
Derivative financial liabilities for hedging purpose [member] | Level 2 [Member]
Disclosure of detailed information about financial instruments [line items]
Non financial liabilities	₩ 24,547	₩ 33,555

XML

Fair Value - Summary of Changes in Level 3 of Fair Value Hierarchy for Recurring Fair Value Measurements (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Disclosure of detailed information about financial instruments [line items]
Beginning balance	₩ 13,766,638
Ending balance	15,486,942	₩ 13,766,638
Beginning balance	18,825,390
Ending balance	19,611,825	18,825,390
Financial assets at fair value through profit or loss [member]
Disclosure of detailed information about financial instruments [line items]
Beginning balance	1,064,856
Ending balance	939,661	1,064,856
Recurring fair value measurement [Member] | Level 3 [Member] | Derivative financial assets for hedging [member]
Disclosure of detailed information about financial instruments [line items]
Beginning balance	1,113	31,565
Reclassification	(1,113)
Disposal	0	(31,565)
Amount recognized in profit or loss	0	0
Amount recognized in other comprehensive income	0	1,113
Ending balance	0	1,113
Recurring fair value measurement [Member] | Level 3 [Member] | Financial liabilities designated as at fair value through profit or loss [member]
Disclosure of detailed information about financial instruments [line items]
Beginning balance	141,280	215,332
Purchases	0	3,046
Reclassification	(7,363)	(54,921)
Disposal	(5,205)
Amount recognized in profit or loss	5,849	(22,177)
Ending balance	134,561	141,280
Recurring fair value measurement [Member] | Level 3 [Member] | Financial assets at fair value through profit or loss [member]
Disclosure of detailed information about financial instruments [line items]
Beginning balance	612,069	577,085
Purchases	216,838	226,310
Reclassification	26,471	(8,962)
Acquisition and disposition of businesses	252	0
Disposal	(44,323)	(179,740)
Amount recognized in profit or loss	(42,475)	(2,624)
Ending balance	768,832	612,069
Recurring fair value measurement [Member] | Level 3 [Member] | Financial assets at fair value through other comprehensive income [member]
Disclosure of detailed information about financial instruments [line items]
Beginning balance	497,129	323,373
Purchases	10,267	262,408
Reclassification	(5,532)	8,122
Acquisition and disposition of businesses	0	(40)
Disposal	(6)	(97,426)
Amount recognized in profit or loss	(61)	18
Amount recognized in other comprehensive income	(57,771)	674
Ending balance	₩ 444,026	₩ 497,129

XML

Fair Value - Summary of Valuation Techniques and Inputs (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Assets
Financial assets at fair value through other comprehensive income	₩ 1,680,168	₩ 1,508,192
Other financial assets
Financial assets at fair value through profit or loss	939,661	1,064,856
Derivative financial assets for hedging	159,211	190,830
Investment properties	2,198,135	1,933,358	₩ 1,720,654
Liabilities
Borrowing	10,218,165	10,006,685
Other financial liabilities
Financial liabilities at fair value through profit or loss	136,106	141,280
Derivative financial liabilities for hedging	24,547	33,555
Level 2 [Member]
Other financial assets
Derivative financial assets for hedging	159,211
Liabilities
Borrowing	₩ 9,979,545	₩ 9,405,992
Other financial liabilities
Valuation techniques	DCF Model
Valuation techniques	DCF Model	DCF Model
Description of inputs used in fair value measurement, assets	Market observation discount rate,Swap interest rate
Description of inputs used in fair value measurement, liabilities	Bond interest rate	Bond interest rate
Level 2 [Member] | Derivative financial liabilities for hedging [member]
Other financial liabilities
Derivative financial liabilities for hedging	₩ 24,547	₩ 33,555
Valuation techniques	DCF Model	DCF Model
Description of inputs used in fair value measurement, liabilities	Market observation discount rate	Market observation discount rate
Level 2 [Member] | Financial assets at fair value through other comprehensive income [member] | Trades and other receivables [member]
Assets
Financial assets at fair value through other comprehensive income	₩ 116,198	₩ 129,124
Other financial liabilities
Valuation techniques	DCF Model	DCF Model
Description of inputs used in fair value measurement, assets	Guaranteed bond interest rate	Guaranteed bond interest rate
Level 2, 3 [Member]
Other financial assets
Derivative financial assets for hedging		₩ 190,830
Other financial liabilities
Valuation techniques		DCF Model
Description of inputs used in fair value measurement, assets		Market observation discount rate,Swap interest rate
Level 2, 3 [Member] | Financial liabilities at fair value through profit or loss [member]
Other financial liabilities
Financial liabilities at fair value through profit or loss	₩ 136,106
Valuation techniques	DCF Model, Binomial Option Pricing Model,
Description of inputs used in fair value measurement, liabilities	Forward exchange rateForward interest rate
Level 2, 3 [Member] | Financial assets at fair value through profit or loss [member]
Other financial assets
Financial assets at fair value through profit or loss	₩ 925,750	₩ 1,038,209
Other financial liabilities
Valuation techniques	DCF Model, Adjusted Net Asset Model, Monte-Carlo Simulation	DCF Model, Adjusted Net Asset Model, Monte-Carlo Simulation
Description of inputs used in fair value measurement, assets	Market Interest rate, Underlying asset price	Market Interest rate,Underlying asset price
Level 2, 3 [Member] | Financial assets at fair value through other comprehensive income [member]
Assets
Financial assets at fair value through other comprehensive income	₩ 449,232	₩ 502,292
Other financial liabilities
Valuation techniques	DCF Model, Market Approach Model	DCF Model, Market Approach Model
Description of inputs used in fair value measurement, assets	Discount rate	Discount rate
Level 3 [Member]
Other financial assets
Investment properties	₩ 5,276,169	₩ 5,370,047
Other financial liabilities
Valuation techniques	DCF Model	DCF Model
Level 3 [Member] | Financial liabilities at fair value through profit or loss [member]
Other financial liabilities
Financial liabilities at fair value through profit or loss		₩ 141,280
Valuation techniques		DCF Model, Binomial Option Pricing Model, Monte-Carlo Simulation
Description of inputs used in fair value measurement, liabilities		Forward exchange rateForward interest rate

XML

Fair Value - Summary of Details and Changes of Total Deferred Difference (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Disclosure of detailed information about financial instruments [line items]
Beginning balance	₩ 13,766,638
Recognized at fair value through profit or loss	(939,661)	₩ (1,064,856)
Ending balance	15,486,942	13,766,638
Derivatives used for hedging [member]
Disclosure of detailed information about financial instruments [line items]
Beginning balance	0	832
New transactions	0	0
Recognized at fair value through profit or loss	0	(832)
Ending balance	₩ 0	₩ 0

XML

Interests in Unconsolidated Structured Entities - Summary of Unconsolidated Structured Entities and Nature of Risks (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Disclosure of unconsolidated structured entities [line items]
Other financial assets	₩ 4,164,961	₩ 3,823,936
Joint ventures and associates	1,556,889	1,480,722
Real Estate Finance [member]
Disclosure of unconsolidated structured entities [line items]
Total assets of unconsolidated structured entities	7,890,823	3,539,827
Other financial assets	216,040	77,819
Joint ventures and associates	144,517	123,138
Total	360,557	200,957
Maximum loss exposure Investment assets	360,557	200,957
Investment agreement and others	44,975	40,914
Total	405,532	241,871
PEF and Investment Funds [member]
Disclosure of unconsolidated structured entities [line items]
Total assets of unconsolidated structured entities	4,833,966	5,580,445
Other financial assets	227,266	237,907
Joint ventures and associates	282,550	268,275
Total	509,816	506,182
Maximum loss exposure Investment assets	509,816	506,182
Investment agreement and others	106,064	91,224
Total	615,880	597,406
Asset Securitization [member]
Disclosure of unconsolidated structured entities [line items]
Total assets of unconsolidated structured entities	1,846,270	2,044,989
Unconsolidated structured entities [member]
Disclosure of unconsolidated structured entities [line items]
Total assets of unconsolidated structured entities	14,571,059	11,165,261
Other financial assets	443,306	315,726
Joint ventures and associates	427,067	391,413
Total	870,373	707,139
Maximum loss exposure Investment assets	870,373	707,139
Investment agreement and others	151,039	132,138
Total	₩ 1,021,412	₩ 839,277

XML

Information About Non-controlling Interests - Summary of Changes in Accumulated Non-controlling Interests (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure of subsidiaries [line items]
Accumulated non-controlling interests at the beginning of the year	₩ 1,802,551
Profit or loss allocated to non-controlling interests	(21,143)	₩ 125,165	₩ 102,517
Accumulated non-controlling interests at the end of the year	₩ 1,811,961	₩ 1,802,551
KT Skylife Co., Ltd. [member]
Disclosure of subsidiaries [line items]
Non-controlling Interests rate(%)	49.40%	49.80%	49.70%
Accumulated non-controlling interests at the beginning of the year	₩ 423,189	₩ 410,695	₩ 388,900
Profit or loss allocated to non-controlling interests	(47,355)	7,127	24,795
Dividends paid to non-controlling interests	(8,287)	(8,284)	(8,279)
Others	(6,192)	13,651	5,279
Accumulated non-controlling interests at the end of the year	₩ 361,355	₩ 423,189	₩ 410,695
BC Card Co., Ltd. [member]
Disclosure of subsidiaries [line items]
Non-controlling Interests rate(%)	30.50%	30.50%	30.50%
Accumulated non-controlling interests at the beginning of the year	₩ 524,657	₩ 498,928	₩ 411,826
Profit or loss allocated to non-controlling interests	25,355	47,909	34,496
Dividends paid to non-controlling interests	(4,960)	(7,641)	(6,434)
Others	3,023	(14,539)	59,040
Accumulated non-controlling interests at the end of the year	₩ 548,075	₩ 524,657	₩ 498,928
KTIS Corporation [Member]
Disclosure of subsidiaries [line items]
Non-controlling Interests rate(%)	66.70%	66.70%	68.60%
Accumulated non-controlling interests at the beginning of the year	₩ 141,402	₩ 135,240	₩ 120,071
Profit or loss allocated to non-controlling interests	5,947	14,965	17,715
Dividends paid to non-controlling interests	(2,451)	(2,226)	(1,837)
Others	(1,872)	(6,577)	(709)
Accumulated non-controlling interests at the end of the year	₩ 143,026	₩ 141,402	₩ 135,240
KTCS Corporation [Member]
Disclosure of subsidiaries [line items]
Non-controlling Interests rate(%)	78.30%	78.30%	79.70%
Accumulated non-controlling interests at the beginning of the year	₩ 153,881	₩ 145,111	₩ 129,502
Profit or loss allocated to non-controlling interests	14,228	18,888	21,394
Dividends paid to non-controlling interests	(3,001)	(2,721)	(2,211)
Others	(2,313)	(7,397)	(3,574)
Accumulated non-controlling interests at the end of the year	₩ 162,795	₩ 153,881	₩ 145,111
Nasmedia, Co., Ltd. [Member]
Disclosure of subsidiaries [line items]
Non-controlling Interests rate(%)	55.90%	56.00%	56.00%
Accumulated non-controlling interests at the beginning of the year	₩ 135,425	₩ 124,181	₩ 112,549
Profit or loss allocated to non-controlling interests	10,679	15,610	15,185
Dividends paid to non-controlling interests	(4,028)	(4,187)	(3,808)
Others	(467)	(179)	255
Accumulated non-controlling interests at the end of the year	₩ 141,609	₩ 135,425	₩ 124,181

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Information About Non-controlling Interests - Summary of Financial Information on Subsidiaries (Detail) - KRW (₩) ₩ in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Disclosure of subsidiaries [line items]
Current assets	₩ 14,594,246	₩ 12,690,014
Non-current assets	28,197,401	28,299,796
Current liabilities	13,247,637	10,699,268
Non-current liabilities	11,001,436	11,877,846
Equity	18,542,575	18,412,696	₩ 16,567,161	₩ 15,551,433
KT Skylife Co., Ltd. [member]
Disclosure of subsidiaries [line items]
Current assets	425,661	420,701
Non-current assets	795,182	938,465
Current liabilities	353,839	274,637
Non-current liabilities	125,531	229,042
Equity	741,473	855,487
BC Card Co., Ltd. [member]
Disclosure of subsidiaries [line items]
Current assets	3,739,847	3,152,622
Non-current assets	2,613,031	2,513,453
Current liabilities	3,661,263	2,879,551
Non-current liabilities	1,061,169	1,229,649
Equity	1,630,446	1,556,875
KTIS Corporation [Member]
Disclosure of subsidiaries [line items]
Current assets	111,313	102,121
Non-current assets	336,296	294,087
Current liabilities	116,271	103,698
Non-current liabilities	127,248	95,506
Equity	204,090	197,004
KTCS Corporation [Member]
Disclosure of subsidiaries [line items]
Current assets	304,508	296,209
Non-current assets	130,391	123,517
Current liabilities	187,621	188,379
Non-current liabilities	47,228	40,240
Equity	200,050	191,107
Nasmedia, Co., Ltd. [Member]
Disclosure of subsidiaries [line items]
Current assets	411,774	435,359
Non-current assets	101,537	81,586
Current liabilities	251,207	261,381
Non-current liabilities	11,129	14,349
Equity	₩ 250,975	₩ 241,215

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Information About Non-controlling Interests - Summary of consolidated statements of comprehensive income (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure of Summarized Consolidated Statements of Comprehensive Income of Subsidiaries [Line Items]
Operating revenue	₩ 26,287,201	₩ 25,638,855	₩ 24,898,005
Profit (loss) for the year	972,182	1,385,635	1,459,395
Other comprehensive income(loss)	7,447	(2,194)	165,567
Total comprehensive income	979,629	1,383,441	1,624,962
KT Skylife Co., Ltd. [member]
Disclosure of Summarized Consolidated Statements of Comprehensive Income of Subsidiaries [Line Items]
Operating revenue	1,034,342	1,038,468	772,950
Profit (loss) for the year	(109,407)	20,941	62,309
Other comprehensive income(loss)	(6,625)	13,544	12,686
Total comprehensive income	(116,032)	34,485	74,995
BC Card Co., Ltd. [member]
Disclosure of Summarized Consolidated Statements of Comprehensive Income of Subsidiaries [Line Items]
Operating revenue	4,027,450	3,897,090	3,580,970
Profit (loss) for the year	76,545	148,341	120,308
Other comprehensive income(loss)	13,832	(5,286)	2,270
Total comprehensive income	90,377	143,055	122,578
KTIS Corporation [Member]
Disclosure of Summarized Consolidated Statements of Comprehensive Income of Subsidiaries [Line Items]
Operating revenue	593,162	536,229	487,801
Profit (loss) for the year	13,922	15,917	24,944
Other comprehensive income(loss)	(3,162)	(2,415)	3,725
Total comprehensive income	10,760	13,502	28,669
KTCS Corporation [Member]
Disclosure of Summarized Consolidated Statements of Comprehensive Income of Subsidiaries [Line Items]
Operating revenue	1,035,911	1,031,010	968,499
Profit (loss) for the year	15,804	17,634	19,034
Other comprehensive income(loss)	(2,550)	(134)	(2,120)
Total comprehensive income	13,254	17,500	16,914
Nasmedia, Co., Ltd. [Member]
Disclosure of Summarized Consolidated Statements of Comprehensive Income of Subsidiaries [Line Items]
Operating revenue	147,934	153,210	125,876
Profit (loss) for the year	17,703	27,691	27,120
Other comprehensive income(loss)	(1,890)	(695)	871
Total comprehensive income	₩ 15,813	₩ 26,996	₩ 27,991

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Information About Non-controlling Interests - Summary of consolidated statements of cash flows (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure of Summarized Consolidated Statements of Cash Flows of Subsidiaries [Line Items]
Cash flows from operating activities	₩ 5,503,289	₩ 3,597,065	₩ 5,561,834
Cash flows from investing activities	(4,620,508)	(4,838,643)	(5,137,474)
Cash flows from financing activities	(452,792)	669,331	(41,282)
Net increase (decrease) in cash and cash equivalents	430,492	(570,530)	384,968
Cash and cash equivalents at beginning of year	2,449,062	3,019,592	2,634,624
Exchange differences	503	1,717	1,890
Cash and cash equivalents at end of year	2,879,554	2,449,062	3,019,592
KT Skylife Co., Ltd. [member]
Disclosure of Summarized Consolidated Statements of Cash Flows of Subsidiaries [Line Items]
Cash flows from operating activities	207,207	176,407	102,947
Cash flows from investing activities	(125,343)	(78,928)	(352,116)
Cash flows from financing activities	(50,811)	(79,455)	230,010
Net increase (decrease) in cash and cash equivalents	31,053	18,024	(19,159)
Cash and cash equivalents at beginning of year	98,695	80,672	99,834
Exchange differences		(1)	(3)
Cash and cash equivalents at end of year	129,748	98,695	80,672
BC Card Co., Ltd. [member]
Disclosure of Summarized Consolidated Statements of Cash Flows of Subsidiaries [Line Items]
Cash flows from operating activities	82,883	(798,043)	(157,645)
Cash flows from investing activities	(74,430)	(7,733)	(283,313)
Cash flows from financing activities	(67,609)	914,441	526,563
Net increase (decrease) in cash and cash equivalents	(59,156)	108,665	85,605
Cash and cash equivalents at beginning of year	435,047	326,482	240,584
Exchange differences	(95)	(100)	293
Cash and cash equivalents at end of year	375,796	435,047	326,482
KTIS Corporation [Member]
Disclosure of Summarized Consolidated Statements of Cash Flows of Subsidiaries [Line Items]
Cash flows from operating activities	50,892	13,809	49,011
Cash flows from investing activities	(17,636)	9,813	(27,143)
Cash flows from financing activities	(32,872)	(29,199)	(23,126)
Net increase (decrease) in cash and cash equivalents	384	(5,577)	(1,258)
Cash and cash equivalents at beginning of year	24,944	30,521	31,779
Cash and cash equivalents at end of year	25,328	24,944	30,521
KTCS Corporation [Member]
Disclosure of Summarized Consolidated Statements of Cash Flows of Subsidiaries [Line Items]
Cash flows from operating activities	55,146	19,423	6,945
Cash flows from investing activities	(5,901)	13,245	(1,039)
Cash flows from financing activities	(26,948)	(35,578)	(16,622)
Net increase (decrease) in cash and cash equivalents	22,297	(2,910)	(10,716)
Cash and cash equivalents at beginning of year	61,814	63,884	75,440
Exchange differences		840	(840)
Cash and cash equivalents at end of year	84,111	61,814	63,884
Nasmedia Co Ltd [Member]
Disclosure of Summarized Consolidated Statements of Cash Flows of Subsidiaries [Line Items]
Cash flows from operating activities	8,116	22,015	44,500
Cash flows from investing activities	(30,910)	3,845	(16,966)
Cash flows from financing activities	(11,077)	(11,136)	(9,843)
Net increase (decrease) in cash and cash equivalents	(33,871)	14,724	17,691
Cash and cash equivalents at beginning of year	86,133	71,396	53,720
Exchange differences	15	13	(15)
Cash and cash equivalents at end of year	₩ 52,277	₩ 86,133	₩ 71,396

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Information About Non-controlling Interests - Summary of Changes in Ownership Interest on the Equity Attributable to Owners (Detail) - KRW (₩) ₩ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure of subsidiaries [abstract]
Carrying amount of non-controlling interests acquired	₩ 3,022	₩ 19,272	₩ 14,702
Consideration paid to non-controlling interests	213,819	69,652	1,095
Effect of changes in equity (net amount)	₩ 216,841	₩ 88,924	₩ 15,797

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Events After the Reporting Period - Summary of Public Bonds Issued After Reporting Period (Detail) ₩ in Millions	12 Months Ended
	Dec. 31, 2023 KRW (₩)
Disclosure of non-adjusting events after reporting period [line items]
Annual interest rates	0.00%
Gross carrying amount [member] | The 200-1st Public bond [member]
Disclosure of non-adjusting events after reporting period [line items]
Issued Date	Feb. 27, 2024
Annual interest rates	3.552%
Maturity	Feb. 27, 2026
Carrying amount	₩ 120,000
Gross carrying amount [member] | The 200-2nd Public bond [member]
Disclosure of non-adjusting events after reporting period [line items]
Issued Date	Feb. 27, 2024
Annual interest rates	3.608%
Maturity	Feb. 26, 2027
Carrying amount	₩ 200,000
Gross carrying amount [member] | The 200-3rd Public bond [member]
Disclosure of non-adjusting events after reporting period [line items]
Issued Date	Feb. 27, 2024
Annual interest rates	3.548%
Maturity	Feb. 27, 2029
Carrying amount	₩ 80,000

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Events After the Reporting Period - Additional Information (Detail) - KRW (₩) ₩ in Millions			12 Months Ended
	Mar. 25, 2024	Feb. 07, 2024	Dec. 31, 2023	Dec. 31, 2021
Disclosure of non-adjusting events after reporting period [line items]
Purchase of treasury shares		₩ 27,100	₩ 300,243	₩ 190,105
Treasury Stocks Transactions [Member]
Disclosure of non-adjusting events after reporting period [line items]
Number of treasury stocks retired	695,775