40-F

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 40-F

[Check one]

☐ REGISTRATION STATEMENT PURSUANT TO SECTION 12 OF THE SECURITIES EXCHANGE ACT OF 1934

OR

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

For the fiscal year ended December 31, 2020                                         Commission File Number 001-34244

HUDBAY MINERALS INC.

(Exact name of Registrant as specified in its charter)

N/A

(Translation of Registrant's name into English (if applicable))

Canada

(Province or other jurisdiction of incorporation or organization)

1000

(Primary Standard Industrial Classification Code Number (if applicable))

98-0485558

(I.R.S. Employer Identification Number (if applicable))

25 York Street

Suite 800

Toronto, Ontario

M5J 2V5, Canada

416 362-8181

(Address and telephone number of Registrant's principal executive offices)

Corporation Service Company

2711 Centerville Road, Suite 400

Wilmington, DE 19808

302 636-5401

(Name, address (including zip code) and telephone number (including area code) of agent for service in the United States)

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

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common Shares, no par value	HBM	The New York Stock Exchange

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

N/A

(Title of Class)

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

N/A

(Title of Class)

For annual reports, indicate by check mark the information filed with this form:

☒Annual Information Form ☒Audited Annual Financial Statements

Indicate the number of outstanding shares of each of the issuer's classes of capital or common stock as of the close of the period covered by the annual report: As at December 31, 2020, 261,272,151 common shares were outstanding.

Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13(d) or 15(d) of the Exchange Act 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 in the past 90 days.

Yes  ☒ No  ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted and posted 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).

Yes  ☒ No  ☐

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 12b-2 of

the Exchange Act.

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.  ☒

† The term "new or revised financial accounting standard" refers to any update issued by the Financial Accounting Standards Board to its Accounting Standards Codification after April 5, 2012.

EXPLANATORY NOTE

Hudbay Minerals Inc. (the "Registrant") is a Canadian issuer eligible to file its annual report ("Annual Report") pursuant to Section 13(a) of the Exchange Act, on Form 40-F pursuant to the multi-jurisdictional disclosure system under the Exchange Act. The Registrant is a "foreign private issuer" as defined in Rule 405 under the Securities Act of 1933, as amended (the "Securities Act"), and Rule 3b-4 under the Exchange Act. The equity securities of the Registrant are accordingly exempt from Sections 14(a), 14(b), 14(c), 14(f) and 16 of the Exchange Act pursuant to Rule 3a12-3 under the Exchange Act.

The Registrant is permitted, under the multi-jurisdictional disclosure system adopted by the United States and Canada, to prepare this Annual Report on Form 40-F in accordance with Canadian disclosure requirements, which are different from those of the United States.

This Annual Report contains references to both United States dollars and Canadian dollars. All dollar amounts referenced, unless otherwise indicated, are expressed in United States dollars, and Canadian dollars are referred to as "Canadian dollars" or "C$".

DOCUMENTS INCORPORATED BY REFERENCE

The Registrant's Annual Information Form ("AIF") for the fiscal year ended December 31, 2020 is incorporated herein by reference as Exhibit 99.1.

The audited consolidated financial statements (the "Audited Annual Financial Statements") of the Registrant for the years ended December 31, 2020 and 2019, including the reports of the Independent Registered Public Accounting Firm with respect thereto, are incorporated herein by reference as Exhibit 99.2. The Audited Annual Financial Statements have been prepared using accounting policies consistent with International Financial Reporting Standards ("IFRS") as issued by the International Accounting Standards Board.

The Registrant's Management's Discussion & Analysis for the year ended December 31, 2020 is incorporated herein by reference as Exhibit 99.3.

The Registrant's Disclosure Pursuant to Section 1503(a) of the Dodd-Frank Wall Street Reform and Consumer Protection Act is incorporated herein by reference as Exhibit 99.4.

DISCLOSURE CONTROLS AND PROCEDURES

As of the end of the period covered by this Annual Report for the Registrant's fiscal year ended December 31, 2020, an evaluation of the effectiveness of the Registrant's "disclosure controls and procedures" (as such term is defined in Rules 13a-15(e) and 15d-15(e) of the Exchange Act) was carried out by the Registrant's management with the participation and supervision of the principal executive officer and principal financial officer. Based upon that evaluation, the Registrant's principal executive officer and principal financial officer have concluded that as of December 31, 2020, the Registrant's disclosure controls and procedures are effective to ensure that information required to be disclosed by the Registrant in reports that it files or submits under the Exchange Act is (i) recorded, processed, summarized and reported within the time periods specified in Commission rules and forms and (ii) accumulated and communicated to the Registrant's management, including its principal executive officer and principal financial officer, to allow timely decisions regarding required disclosure.

INTERNAL CONTROL OVER FINANCIAL REPORTING

The disclosure provided under "Internal control over financial reporting ("ICFR")" on page 70 of Exhibit 99.3, Management's Discussion & Analysis for the Year Ended December 31, 2020, is incorporated by reference herein. The Registrant did not make any changes to its "internal control over financial reporting" (as such term is defined in Rules 13a-15(f) and 15d-15(f) of the Exchange Act) during the year ended December 31, 2020 that materially affected, or are reasonably likely to materially affect, its internal control over financial reporting.

Management's report dated February 18, 2021 on the Registrant's internal control over financial reporting contained in Exhibit 99.2, Audited Annual Financial Statements, is incorporated by reference herein.

The Registrant's internal control over financial reporting as of December 31, 2020 has been audited by Deloitte LLP ("Deloitte"), Independent Registered Public Accounting Firm who also audited the Registrant's Consolidated Financial Statements for the years ended December 31, 2020 and 2019. Deloitte expressed an unqualified opinion on the effectiveness of the Registrant's internal control over financial reporting.

All internal control systems, no matter how well designed, have inherent limitations. As a result, even systems determined to be effective may not prevent or detect misstatements on a timely basis, as systems can provide only reasonable assurance that the objectives of the control system are met. In addition, projections of any evaluation of the effectiveness of internal control over financial reporting 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 change.

ATTESTATION REPORT OF THE REGISTERED PUBLIC ACCOUNTING FIRM

The disclosure provided in the two reports of Deloitte titled "Report of Independent Registered Public Accounting Firm" contained in Exhibit 99.2, Audited Annual Financial Statements for the years ended December 31, 2020 and 2019, are incorporated herein by reference.

BLACKOUT PERIODS

There were no "blackout periods", as defined under Rule 100(b) of Regulation BTR, requiring notice pursuant to Rule 104 of Regulation BTR during the fiscal year ended December 31, 2020.

AUDIT COMMITTEE IDENTIFICATION AND FINANCIAL EXPERT

As at December 31, 2020, the Registrant's audit committee consisted of Carol T. Banducci, Daniel Muñiz Quintanilla and Colin Osborne. The Registrant's board of directors has determined that each of Ms. Banducci, Mr. Muñiz Quintanilla and Mr. Osborne is an "audit committee financial expert" within the meaning of the Commission's rules. Each of Ms. Banducci, Mr. Muñiz Quintanilla and Mr. Osborne is also "independent" under the criteria of Rule 10A-3 of the Exchange Act as required by the New York Stock Exchange (the "NYSE"). The Commission has indicated that the designation of Ms. Banducci, Mr. Muñiz Quintanilla and Mr. Osborne as audit committee financial experts does not make any of them an "expert" for any purpose or impose any duties, obligations or liability on Ms. Banducci, Mr. Muñiz Quintanilla and Mr. Osborne that are greater than those imposed on members of the audit committee and board of directors who do not carry this designation. The audit committee's charter sets out its responsibilities and duties, qualifications for membership, procedures for committee appointment and reporting to the Registrant's board of directors. A copy of the current charter is attached to the AIF as Schedule C and is available on the Registrant's website at www.hudbayminerals.com/about-us/governance/default.aspx.

CODE OF ETHICS

The Registrant has adopted a Code of Business Conduct and Ethics (the "Code of Ethics") that applies to its principal executive officer, principal financial officer, principal accounting officer or controller and persons performing similar functions. A copy of the Code of Ethics is available on the Registrant's website at www.hudbayminerals.com/about-us/governance/default.aspx. The Registrant undertakes to provide to any person, without charge, upon request, a copy of the Code of Ethics.  Requests for copies of the Code of Ethics should be made by contacting the Registrant's Vice President and General Counsel at 416 362-8181.  No waivers of the Registrant's Code of Ethics were granted to any principal officer of the Registrant or any person performing similar functions during the fiscal year ended December 31, 2020.

During the fiscal year ended December 31, 2020, the Registrant did not make any amendments to its Code of Ethics. All amendments to the Code of Ethics, and all waivers of the Code of Ethics with respect to any of the officers covered by it, will be posted on the Registrant's website at www.hudbayminerals.com/about-us/governance/default.aspx.

PRINCIPAL ACCOUNTANT FEES AND SERVICES

The information provided under the heading "Audit Committee Disclosure" on page 54 of the AIF is incorporated by reference herein. All audit services, audit-related services, tax services, and other services provided for the fiscal year ended December 31, 2020 were pre-approved by the audit committee in accordance with the Registrant's pre-approval policy as described under the heading "Policy Regarding Non-Audit Services Rendered by Auditors" on page 56 of the AIF.

OFF-BALANCE SHEET ARRANGEMENTS

The Registrant has no off-balance sheet arrangements that have or are reasonably likely to have a current or future effect on the Registrant's financial condition, changes in financial condition, revenues or expenses, results of operation, liquidity, capital expenditures or capital resources that is material to investors.

TABULAR DISCLOSURE OF CONTRACTUAL OBLIGATIONS

The disclosure provided under "Contractual Obligations" on page 46 of Exhibit 99.3, Management's Discussion & Analysis for the Year Ended December 31, 2020, is incorporated by reference herein.

COMPARISON WITH NEW YORK STOCK EXCHANGE GOVERNANCE RULES

The NYSE requires that each listed company meet certain corporate governance standards.  These standards supplement the corporate governance reforms adopted by the United States Securities and Exchange Commission pursuant to the Sarbanes-Oxley Act of 2002.

Under the NYSE's Listed Company Manual, a "foreign private issuer", such as the Registrant, is not required to comply with most of the NYSE corporate governance standards.  However, foreign private issuers are required to disclose any significant ways in which their corporate governance practices differ from those followed by U.S. companies under the NYSE corporate governance standards.

The Registrant is subject to the listing standards of the Toronto Stock Exchange (the "TSX") and the corporate governance rules of Canadian Securities Administrators.  These listing standards and corporate governance rules are substantially similar to the NYSE listing standards.  The Registrant complies with these TSX listing standards and Canadian corporate governance rules.

The following are the significant ways in which the Registrant's governance practices differ from those followed by domestic companies under the NYSE corporate governance standards:

Director Independence 

The Registrant determines independence of its directors under the policies of the Canadian Securities Administrators.  For a director to be considered independent under the policies of the Canadian Securities Administrators, he or she must have no direct or indirect material relationship with us, being a relationship that could, in the view of the board of directors reasonably be expected to interfere with the exercise of his or her independent judgment, and must not be in any relationship deemed to be not independent pursuant to such policies.  To assist in determining the independence of directors for purposes that include compliance with applicable legal and regulatory requirements and policies, the board of directors has adopted certain categorical standards, which are part of our Corporate Governance Guidelines.  The Registrant's board of directors also determines whether each member of the Registrant's audit committee is independent pursuant to National Instrument 52-110 Audit Committees and Rule 10A-3 of the Exchange Act.  The Registrant's board of directors has not adopted the director independence standards contained in Section 303A.02 of the NYSE's Listed Company Manual.

Approval of Equity Compensation Plans

Section 303A.08 of the NYSE's Listed Company Manual requires shareholder approval of all equity compensation plans and material revisions to such plans.  The definition of "equity compensation plans" covers plans that provide for the delivery of both newly issued and treasury securities, as well as plans that rely on securities re-acquired in the open market by the issuing company for the purpose of redistribution to employers and directors. The TSX rules only require that shareholders approve the adoption of equity compensation plans that provide for new issuances of securities.  Any amendments to such plans are subject to shareholder approval unless the specific equity compensation plan contains detailed provisions, approved by the shareholders, which specify those amendments requiring shareholder approval and those amendments which can be made without shareholder approval.  The Registrant follows the TSX rules with respect to the requirements for shareholder approval of equity compensation plans and revisions to such plans.

Shareholder Approval Requirement

In lieu of Section 312 of the NYSE's Listed Company Manual, the Registrant will follow the TSX rules for shareholder approval of new issuances of its common shares.  Following the TSX rules, shareholder approval is required for certain issuances of shares that (i) materially affect control of the Registrant or (ii) provide consideration to insiders in aggregate of 10% or greater of the market capitalization of the listed issuer and have not been negotiated at arm's length.  Shareholder approval is also required, pursuant to the TSX rules, in the case of private placements (x) for an aggregate number of listed securities issuable greater than 25% of the number of securities of the listed issuer which are outstanding, on a non-diluted basis, prior to the date of closing of the transaction if the price per security is less than the market price or (y) that during any six month period are to insiders for listed securities or options, rights or other entitlements to listed securities greater than 10% of the number of securities of the listed issuer which are outstanding, on a non-diluted basis, prior to the date of the closing of the first private placement to an insider during the six month period.

INTERACTIVE DATA FILE

The required disclosure for the fiscal year ended December 31, 2020 is filed as Exhibit 101 to this Annual Report on Form 40-F.

MINE SAFETY DISCLOSURE

Pursuant to Section 1503(a) of the Dodd-Frank Wall Street Reform and Consumer Protection Act, issuers that are operators, or that have a subsidiary that is an operator, of a coal or other mine are required to disclose in their periodic reports filed with the Commission information regarding specified health and safety violations, orders and citations, related assessments and legal actions, and mining-related fatalities. For information regarding the Registrant's mine safety disclosures, see "Disclosure Pursuant to Section 1503(a) of the Dodd-Frank Wall Street Reform and Consumer Protection Act" filed as Exhibit 99.4 to this Annual Report on Form 40-F.

FORWARD-LOOKING STATEMENTS

Certain statements in this Annual Report on Form 40-F are forward-looking statements within the meaning of Section 21E of the Exchange Act and Section 27A of the Securities Act. Please see "Forward Looking Information" in the AIF for a discussion of risks, uncertainties, and assumptions that could cause actual results to vary from those forward-looking statements.

UNDERTAKING

The Registrant undertakes to make available, in person or by telephone, representatives to respond to inquiries made by the Commission staff, and to furnish promptly, when requested to do so by the Commission staff, information relating to: the securities registered pursuant to Form 40-F; the securities in relation to which the obligation to file an annual report on Form 40-F arises; or transactions in said securities.

CONSENT TO SERVICE OF PROCESS

The Registrant has previously filed with the Commission a written consent to service of process and power of attorney on Form F-X. Any change to the name or address of the Registrant's agent for service shall be communicated promptly to the Commission by amendment to the Form F-X referencing the file number of the Registrant.

***

SIGNATURES

Pursuant to the requirements of the Exchange Act, the Registrant certifies that it meets all of the requirements for filing on Form 40-F and has duly caused this Annual Report to be signed on its behalf by the undersigned, thereto duly authorized.

HUDBAY MINERALS INC.
By:	/s/ Patrick Donnelly
Name:	Patrick Donnelly
Title:	Vice President and General Counsel
Date:	March 29, 2021

EXHIBIT INDEX

Exhibit	Description and Date of Document
Annual Information Form; Audited Financial Statements; Management's Discussion and Analysis; Mine Safety Disclosure
99.1	Annual Information Form for the Year Ended December 31, 2020
99.2	Audited Annual Financial Statements for the Years Ended December 31, 2020 and 2019
99.3	Management's Discussion & Analysis for the Year Ended December 31, 2020
99.4	Disclosure Pursuant to Section 1503(a) of the Dodd-Frank Wall Street Reform and Consumer Protection Act
Certifications
99.5	Certification of Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
99.6	Certification of Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
99.7	Certification of Chief Executive Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
99.8	Certification of Chief Financial Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
Consents
99.9	Consent of Cashel Meagher, P.Geo., dated March 29, 2021
99.10	Consent of Olivier Tavchandjian, P.Geo., dated March 29, 2021
99.11	Consent of Deloitte LLP, dated March 29, 2021
Interactive Data Files
101.INS	XBRL Instance Document
101.SCH	XBRL Taxonomy Extension Schema Document
101.CAL	XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF	XBRL Taxonomy Extension Definition Linkbase Document
101.LAB	XBRL Taxonomy Extension Label Linkbase Document
101.PRE	XBRL Taxonomy Extension Presentation Linkbase Document

EX-99.1

TABLE OF CONTENTS

CAUTION REGARDING FORWARD-LOOKING INFORMATION	1
NOTE TO UNITED STATES INVESTORS	3
OTHER IMPORTANT INFORMATION	4
CURRENCY AND EXCHANGE RATES	4
NON-IFRS FINANCIAL PERFORMANCE MEASURES	4
CORPORATE STRUCTURE	5
INCORPORATION AND REGISTERED OFFICE	5
INTERCORPORATE RELATIONSHIPS	5
DEVELOPMENT OF OUR BUSINESS	6
STRATEGY	6
THREE YEAR HISTORY	7
DESCRIPTION OF OUR BUSINESS	10
GENERAL	10
MATERIAL MINERAL PROJECTS	12
OTHER ASSETS	23
OTHER INFORMATION	29
SUSTAINABILITY	32
HEALTH, SAFETY AND ENVIRONMENTAL POLICIES	32
HUMAN RIGHTS POLICY	32
SUSTAINABILITY REPORTING	33
RISK FACTORS	33
DESCRIPTION OF CAPITAL STRUCTURE	46
COMMON SHARES	46
PREFERENCE SHARES	46
SENIOR UNSECURED NOTES	47
CREDIT RATINGS	47
DIVIDENDS	50
MARKET FOR SECURITIES	50
DIRECTORS AND OFFICERS	51
AUDIT COMMITTEE DISCLOSURE	54
LEGAL PROCEEDINGS AND REGULATORY ACTIONS	56
INTEREST OF MANAGEMENT AND OTHERS IN MATERIAL TRANSACTIONS	57
TRANSFER AGENT AND REGISTRAR	57
MATERIAL CONTRACTS	57
QUALIFIED PERSONS	58
INTERESTS OF EXPERTS	58
ADDITIONAL INFORMATION	58
SCHEDULE A: GLOSSARY OF MINING TERMS	A1
SCHEDULE B: MATERIAL MINERAL PROJECTS	B1
SCHEDULE C: AUDIT COMMITTEE CHARTER	C1

ANNUAL INFORMATION FORM | i

CAUTION REGARDING FORWARD-LOOKING INFORMATION

This annual information form ("AIF") contains "forward-looking information" within the meaning of applicable Canadian securities laws and "forward looking statements" within the meaning of the "safe harbor" provisions of the U.S. Private Securities Litigation Reform Act of 1995. We refer to such forward-looking statements and forward-looking information together in this AIF as forward-looking information. All information contained in this AIF, other than statements of current and historical fact, is forward-looking information. Often, but not always, forward-looking information can be identified by the use of words such as "plans", "expects", "budget", "guidance", "scheduled", "estimates", "forecasts", "strategy", "target", "intends", "objective", "goal", "understands", "anticipates" and "believes" (and variations of these or similar words) and statements that certain actions, events or results "may", "could", "would", "should", "might" "occur" or "be achieved" or "will be taken" (and variations of these or similar expressions). All of the forward-looking information in this AIF is qualified by this cautionary note.

Forward-looking information includes, but is not limited to, production, cost and capital and exploration expenditure guidance and potential revisions to such guidance, anticipated production at our mines and processing facilities, expectations regarding the impact of the COVID-19 pandemic on our operations, financial condition and prospects, and our ability to effectively engage with local communities in Peru and other stakeholders, expectations regarding the timing of mining activities at the Pampacancha deposit and any additional delivery obligations under the Constancia stream agreement, the anticipated timing, cost and benefits of developing the Rosemont project and the outcome of litigation challenging Rosemont's permits, expectations regarding the Copper World exploration program, expectations regarding the Lalor gold strategy, including the refurbishment, commissioning and ramp-up of the New Britannia mill and the expectations regarding the mine plan for the 1901 deposit, increasing the mining rate at Lalor and optimizing the Stall and New Britannia mills, the possibility of converting inferred mineral resource estimates to higher confidence categories, the potential and our anticipated plans for advancing our mining properties surrounding Constancia and elsewhere in Peru, anticipated mine plans, anticipated metals prices and the anticipated sensitivity of our financial performance to metals prices, events that may affect our operations and development projects, anticipated cash flows from operations and related liquidity requirements, the anticipated effect of external factors on revenue, such as commodity prices, estimation of mineral reserves and resources, mine life projections, reclamation costs, economic outlook, government regulation of mining operations, and business and acquisition strategies. Forward-looking information is not, and cannot be, a guarantee of future results or events. Forward-looking information is based on, among other things, opinions, assumptions, estimates and analyses that, while considered reasonable by us at the date the forward-looking information is provided, inherently are subject to significant risks, uncertainties, contingencies and other factors that may cause actual results and events to be materially different from those expressed or implied by the forward-looking information.

The material factors or assumptions that we identified and were applied by us in drawing conclusions or making forecasts or projections set out in the forward looking information include, but are not limited to:

•our ability to continue to operate safely and at full capacity during the COVID-19 pandemic;

•the availability, global supply and effectiveness of COVID-19 vaccines, the effective distribution of such vaccines in the countries in which we operate, the lessening of restrictions related to COVID-19, and the anticipated rate and timing for each of the foregoing;

•our ability to achieve production and unit cost guidance;

•no significant interruptions to our operations or significant delays to our development projects in Manitoba and Peru due to the COVID-19 pandemic;

•the availability of spending reductions and liquidity options;

•the timing of development and production activities on the Pampacancha deposit;

•the timing for reaching additional agreements with individual community members and no significant unanticipated delays to the development of Pampacancha;

•the successful completion of the New Britannia project on budget and on schedule;

•the successful outcome of the Rosemont litigation;

•the successful renegotiation of collective agreements with the labour unions that represent certain of our employees in Manitoba and Peru;

ANNUAL INFORMATION FORM | 1

•the success of mining, processing, exploration and development activities;

•the scheduled maintenance and availability of our processing facilities;

•the accuracy of geological, mining and metallurgical estimates;

•anticipated metals prices and the costs of production;

•the supply and demand for metals we produce;

•the supply and availability of all forms of energy and fuels at reasonable prices;

•no significant unanticipated operational or technical difficulties;

•the execution of our business and growth strategies, including the success of our strategic investments and initiatives;

•the availability of additional financing, if needed;

•the ability to complete project targets on time and on budget and other events that may affect our ability to develop our projects;

•the timing and receipt of various regulatory and governmental approvals;

•the availability of personnel for our exploration, development and operational projects and ongoing employee relations;

•maintaining good relations with the labour unions that represent certain of our employees in Manitoba and Peru;

•maintaining good relations with the communities in which we operate, including the neighbouring Indigenous communities and local governments;

•no significant unanticipated challenges with stakeholders at our various projects;

•no significant unanticipated events or changes relating to regulatory, environmental, health and safety matters;

•no contests over title to our properties, including as a result of rights or claimed rights of Indigenous peoples or challenges to the validity of our unpatented mining claims;

•the timing and possible outcome of pending litigation and no significant unanticipated litigation;

•certain tax matters, including, but not limited to current tax laws and regulations and the refund of certain value added taxes from the Canadian and Peruvian governments; and

•no significant and continuing adverse changes in general economic conditions or conditions in the financial markets (including commodity prices and foreign exchange rates).

The risks, uncertainties, contingencies and other factors that may cause actual results to differ materially from those expressed or implied by the forward-looking information may include, but are not limited to, risks associated with the COVID-19 pandemic and its effect on our operations, financial condition, projects and prospects, the possibility of a global recession arising from the COVID-19 pandemic and attempts to control it, the political situation in Peru, risks generally associated with the mining industry, such as economic factors (including future commodity prices, currency fluctuations, energy prices and general cost escalation), uncertainties related to the development and operation of our projects, risks related to the U.S. district court's recent decisions to set aside the U.S. Forest Service's Final Record of Decision ("FROD") and the Biological Opinion for Rosemont and related appeals and other legal challenges, risks related to the new Lalor mine plan, including the schedule for the refurbishment, commissioning and ramp-up of the New Britannia mill and the ability to convert inferred mineral resource estimates to higher confidence categories, risks related to the schedule for mining the Pampacancha deposit (including risks associated with COVID-19, with reaching additional agreements with individual community members and the impact of any schedule delays), dependence on key personnel and employee and union relations, risks related to political or social unrest or change, risks in respect of Indigenous and community relations, rights and title claims, operational risks and hazards, including the cost of maintaining and upgrading the Company's tailings management facilities and any unanticipated environmental, industrial and geological events and developments and the inability to insure against all risks, failure of plant, equipment, processes, transportation and other infrastructure to operate as anticipated, compliance with government and environmental regulations, including permitting requirements and anti-bribery legislation, depletion of our reserves, volatile financial markets that may affect our ability to obtain additional financing on acceptable terms, the failure to obtain required approvals or clearances from government authorities on a timely basis, uncertainties related to the geology, continuity, grade and estimates of mineral reserves and resources, and the potential for variations in grade and recovery rates, uncertain costs of reclamation activities, our ability to comply with our pension and other post-retirement obligations, our ability to abide by the covenants in our debt instruments and other material contracts, tax refunds, hedging transactions, as well as the risks discussed under the heading "Risk Factors".

ANNUAL INFORMATION FORM | 2

Should one or more risk, uncertainty, contingency or other factor materialize or should any factor or assumption prove incorrect, actual results could vary materially from those expressed or implied in the forward-looking information. Accordingly, you should not place undue reliance on forward-looking information. We do not assume any obligation to update or revise any forward-looking information after the date of this AIF or to explain any material difference between subsequent actual events and any forward-looking information, except as required by applicable law.

NOTE TO UNITED STATES INVESTORS

This AIF (and documents incorporated by reference herein) has been prepared in accordance with the requirements of the securities laws in effect in Canada, which differ from the requirements of United States securities laws.

Canadian reporting requirements for disclosure of mineral properties are governed by the Canadian Securities Administrators' National Instrument 43-101 Standards of Disclosure for Mineral Projects ("NI 43-101"). Subject to the SEC Modernization Rules described below, the United States reporting requirements are currently governed by the United States Securities and Exchange Commission ("SEC") Industry Guide 7 ("SEC Industry Guide 7") under the Securities Act of 1933, as amended.

The definitions used in NI 43-101 are incorporated by reference from the Canadian Institute of Mining, Metallurgy and Petroleum ("CIM") - Definition Standards adopted by CIM Council on May 10, 2014 (the "CIM Definition Standards"). For example, the terms "mineral reserve", "proven mineral reserve" and "probable mineral reserve" are Canadian mining terms as defined in NI 43-101, and these definitions differ from the definitions in SEC Industry Guide 7. Furthermore, while the terms "mineral resource", "measured mineral resource", "indicated mineral resource" and "inferred mineral resource" are defined in and required to be disclosed by NI 43-101, these terms are not defined terms under SEC Industry Guide 7.

Under SEC Industry Guide 7 standards, a "final" or "bankable" feasibility study is required to report reserves and the primary environmental analysis or report must be filed with the appropriate governmental authority. Further, under SEC Industry Guide 7, mineralization may not be classified as a "reserve" unless the determination has been made that the mineralization could be economically and legally produced or extracted at the time the reserve determination is made. Reserve estimates contained in this AIF and documents incorporated by reference herein may not qualify as "reserves" under SEC Industry Guide 7. Further, until recently, the SEC has not recognized the reporting of mineral deposits which do not meet the SEC Industry Guide 7 definition of "reserve".

The SEC adopted amendments to its disclosure rules to modernize the mineral property disclosure requirements for issuers whose securities are registered with the SEC under the Securities Exchange Act of 1934, as amended. These amendments became effective February 25, 2019 (the "SEC Modernization Rules") with compliance required for the first fiscal year beginning on or after January 1, 2021. The SEC Modernization Rules replace the historical disclosure requirements for mining registrants that were included in SEC Industry Guide 7, which will be rescinded from and after the required compliance date of the SEC Modernization Rules. As a result of the adoption of the SEC Modernization Rules, the SEC now recognizes estimates of "measured mineral resources", "indicated mineral resources" and "inferred mineral resources". In addition, the SEC has amended its definitions of "proven mineral reserves" and "probable mineral reserves" to be "substantially similar" to the corresponding CIM Definition Standards, incorporated by reference in NI 43-101.

United States investors are cautioned that while the above terms are "substantially similar" to CIM definitions, there are differences in the definitions under the SEC Modernization Rules and the CIM Definition Standards. Accordingly, there is no assurance any mineral reserves or mineral resources that the Company may report as "proven mineral reserves", "probable mineral reserves", "measured mineral resources", "indicated mineral resources" and "inferred mineral resources" under NI 43-101 would be the same had the Company prepared the reserve or resource estimates under the standards adopted under the SEC Modernization Rules.

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United States investors are also cautioned that while the SEC will now recognize "measured mineral resources", "indicated mineral resources" and "inferred mineral resources", investors should not assume that any part or all of the mineralization in these categories will ever be converted into a higher category of mineral resources or into mineral reserves. Mineralization described using these terms has a greater amount of uncertainty as to their existence and feasibility than mineralization that has been characterized as reserves. Accordingly, investors are cautioned not to assume that any "measured mineral resources", "indicated mineral resources", or "inferred mineral resources" that the Company reports are or will be economically or legally mineable.

Further, "inferred mineral resources" have a greater amount of uncertainty as to their existence and as to whether they can be mined legally or economically. Therefore, United States investors are also cautioned not to assume that all or any part of the "inferred mineral resources" exist. In accordance with Canadian rules, estimates of "inferred mineral resources" cannot form the basis of feasibility or other economic studies, except in limited circumstances where permitted under NI 43-101.

For the above reasons, information contained in this AIF containing descriptions of the Company's mineral reserve and resource estimates is not comparable to similar information made public by United States companies subject to the reporting and disclosure requirements of the SEC and under the United States federal securities laws and the rules and regulations thereunder.

OTHER IMPORTANT INFORMATION

Certain scientific and technical terms and abbreviations used in this AIF are defined in the "Glossary of Mining Terms" attached as Schedule A.

Unless the context suggests otherwise, references to "we", "us", "our" and similar terms, as well as references to "Hudbay" and "Company", refer to Hudbay Minerals Inc. and its direct and indirect subsidiaries.

CURRENCY AND EXCHANGE RATES

This AIF contains references to both United States dollars and Canadian dollars. All dollar amounts referenced, unless otherwise indicated, are expressed in United States dollars, and Canadian dollars are referred to as "Canadian dollars" or "C$". For United States dollars to Canadian dollars, the average exchange rate for 2020 and the closing exchange rate at December 31, 2020, as reported by the Bank of Canada, were one United States dollar per 1.3415 and 1.2732 Canadian dollars, respectively.

On March 26, 2021, the Bank of Canada daily exchange rate was one United States dollar per 1.2580 Canadian dollars.

NON-IFRS FINANCIAL PERFORMANCE MEASURES

Hudbay uses certain non-IFRS financial performance measures in its financial reports and in this AIF, including adjusted net earnings (loss), adjusted net earnings (loss) per share, adjusted EBITDA, net debt, cash cost, sustaining and all-in sustaining cash cost per pound of copper produced, cash cost and sustaining cash cost per pound of zinc produced, combined unit cost and zinc plant unit cost, cash cost and sustaining cash cost per ounce of gold produced. These measures do not have a meaning prescribed by IFRS and are therefore unlikely to be comparable to similar measures presented by other issuers. These measures should not be considered in isolation or as a substitute for measures prepared in accordance with IFRS and are not necessarily indicative of operating profit or cash flow from operations as determined under IFRS. Other companies may calculate these measures differently. For a description and reconciliation of each of these measures (other than cash cost and sustaining cash cost per ounce of gold produced), please see the Non-IFRS Financial Performance Measures section on pages 53 to 68 of our management's discussion and analysis for the year ended December 31, 2020, a copy of which has been filed on SEDAR at www.sedar.com and EDGAR at www.sec.gov. Further information on the projected cash cost and sustaining cash cost per ounce of gold produced from our Snow Lake operations is contained in Schedule B to this AIF.

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CORPORATE STRUCTURE

INCORPORATION AND REGISTERED OFFICE

We were formed by the amalgamation of Pan American Resources Inc. and Marvas Developments Ltd. on January 16, 1996, pursuant to the Business Corporations Act (Ontario) and changed our name to Pan American Resources Inc. On March 12, 2002, we acquired ONTZINC Corporation, a private Ontario corporation, through a reverse takeover and changed our name to ONTZINC Corporation. On December 21, 2004, we acquired Hudson Bay Mining and Smelting Co., Limited ("HBMS") and changed our name to HudBay Minerals Inc. In connection with the acquisition of HBMS, on December 21, 2004, we amended our articles to consolidate our common shares on a 30 to 1 basis. On October 25, 2005, we were continued under the Canada Business Corporations Act ("CBCA"). On August 15, 2011, we completed a vertical short-form amalgamation under the CBCA with our subsidiary, HMI Nickel Inc. On January 1, 2017, we completed a vertical short-form amalgamation under the CBCA with two of our subsidiaries, HBMS and Hudson Bay Exploration and Development Company Limited, and changed our name from HudBay Minerals Inc. to Hudbay Minerals Inc.

Our registered office is located at 333 Bay Street, Suite 3400, Bay Adelaide Centre, Toronto, Ontario M5H 2S7 and our principal executive office is located at 25 York Street, Suite 800, Toronto, Ontario M5J 2V5.

Our common shares are listed on the Toronto Stock Exchange ("TSX"), New York Stock Exchange ("NYSE") and Bolsa de Valores de Lima under the symbol "HBM".

INTERCORPORATE RELATIONSHIPS

The following chart shows our principal subsidiaries, their jurisdiction of incorporation and the percentage of voting securities we beneficially own or over which we have control or direction.

Notes:

1.Hudbay owns our Canadian mining operations, is the borrower under our Canada Facility, the issuer of our Senior Unsecured Notes and a guarantor of our Peru Facility.

2.HudBay Peru Inc. owns 99.98% of HudBay Peru S.A.C. ("Hudbay Peru"). The remaining 0.02% is owned by 6502873 Canada Inc., our wholly-owned subsidiary. HudBay Peru Inc. is a guarantor of our Credit Facilities and our Senior Unsecured Notes.

3.Hudbay Peru owns the Constancia mine, is the borrower under our Peru Facility and is a guarantor of our Canada Facility and our Senior Unsecured Notes.

4.HudBay (BVI) Inc. ("Hudbay BVI") is the party to the precious metals stream agreement in respect of the Constancia mine.

5.HudBay Marketing & Sales Inc. markets and sells our copper concentrate and zinc metal produced in Manitoba and is a guarantor of our Credit Facilities and our Senior Unsecured Notes.

6.Hudbay Arizona Inc., through its subsidiaries, indirectly owns 100% of Rosemont Copper Company and Mason Resources (US) Inc. ("Mason US").

7.Rosemont Copper Company owns a 100% interest in the Rosemont project.

8.Mason US owns a 100% interest in the Mason project in Nevada as well as certain exploration properties in the surrounding area.

9.HudBay Arizona (Barbados) SRL is the party to the precious metals stream agreement in respect of the Rosemont project.

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DEVELOPMENT OF OUR BUSINESS

STRATEGY

Our mission is to create sustainable value through acquisition, development and operation of high quality, long life deposits with exploration potential in jurisdictions that support responsible mining, and to see the regions and communities in which we operate benefit from our presence.

We believe that the greatest opportunities for shareholder value creation in the mining industry are in the discovery and successful development of new mineral deposits, and through highly efficient low-cost operations to profitably extract ore from those deposits. We also believe that our successful development, ramp-up and operation of the Constancia open-pit mine in Peru, along with our long history of underground mining and full life-cycle experience in northern Manitoba provide us with a competitive advantage in these respects relative to other mining companies of similar scale.

Over the past decade, we have built a world-class asset base by employing a consistent long-term growth strategy. We intend to sustainably grow Hudbay through exploration and development of our robust project pipeline, as well as through the acquisition of other properties that fit our stringent strategic criteria. Furthermore, we continuously work to generate strong free cash flow and optimize the value of our producing asset portfolio through exploration, brownfield expansion projects and efficient and safe operations.

To ensure that any capital allocation or acquisition we undertake creates sustainable value for stakeholders, we have established a number of criteria for evaluating mineral property opportunities. These include the following:

• Geography: Potential acquisitions should be located in jurisdictions that support responsible mining activity and have acceptable levels of political and social risk. Given our current scale and geographic footprint, our current geographic focus is on select investment grade countries in the Americas, with strong rule of law and respect for human rights consistent with our long-standing focus on environmental, social and governance ("ESG") principles;
• Commodity: Among the metals we produce, we believe copper has the best long-term supply/demand fundamentals and the greatest opportunities for sustained risk-adjusted returns. While our primary focus is on copper, we appreciate the polymetallic nature of deposits and, in particular, the counter-cyclical nature of gold production in our portfolio;
• Quality: We are focused on adding long-life, low-cost assets to our existing portfolio of high quality assets. Long life assets can capture peak pricing of multiple commodity price cycles and low cost assets can generate free cash flow even through the trough of price cycles;
• Potential: We consider the full spectrum of acquisition and investment opportunities from early-stage exploration to producing assets, but they must meet our stringent risk-adjusted criteria for growth and value creation. Regardless of the stage of development, we look for mineral assets that we believe offer significant incremental potential for exploration, development and optimization beyond the stated resources and mine plan;
• Process: Through a robust due diligence and capital allocation process, we develop a clear understanding of how we can create value from the investment or the acquired property through the application of our technical, social, operational and project execution expertise, as well as through the provision of necessary financial capacity and other operational optimization opportunities;
• Operatorship: We believe real value is created through leading efficient project development and operations. Hudbay's leadership team is well positioned to drive value and deliver effective capital allocation with our proven track record of successful project development and operational excellence.
• Financial: Investments and acquisitions should be accretive to Hudbay on a per share basis. Given that our strategic focus includes capital allocation to non-producing assets at various stages of development, when evaluating accretion, we will consider measures such as internal rate of return ("IRR"), return on invested capital ("ROIC"), net asset value per share and the contained value of reserves and resources per share.

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THREE YEAR HISTORY

COVID-19 and Our Business

Following the onset of the COVID-19 pandemic, the Company's business response planning commenced in January 2020 and company-wide crisis plans were activated in early-March as part of our crisis management protocols. The Board worked with senior management during this time to ensure risks relating to COVID-19 were identified and mitigation plans were put in place. Throughout the rapidly changing environment, we have remained focused on the health and safety of our workforce and local communities and we have actively engaged with local stakeholders and public health authorities to ensure effective implementation of our business response plans.

In Peru, the government declared a state of emergency on March 15, 2020, requiring non-essential businesses to be shut down. Following this declaration, we commenced the temporary and orderly suspension of operations at Constancia. The shutdown lasted approximately eight weeks, during which a smaller workforce was maintained at the site to oversee critical aspects of the operation and in order to facilitate a quick and efficient restart and ramp up of the mine.

In Manitoba, other than an unrelated production interruption at 777 due to an incident that occurred during routine maintenance of the hoist rope and skip, our mines continued to operate and ship concentrate and zinc metal throughout the year, notwithstanding COVID-19 related challenges.

Each of our business units developed site-specific measures intended to identify and limit COVID-19 exposure and transmission and maintain a safe environment for our workers and our communities. Site-specific measures have included testing of incoming workers prior to their travel to site, pre-screening protocols, quarantine periods for incoming workers, workplace physical distancing protocols, and adjustment of work rotation schedules. These measures have continued to evolve as the status of the pandemic changes in each of our operating regions and our measures are adapted to the regional health authorities' latest restrictions and guidelines.

We believe the most important way we can support the communities in which we operate is to manage safe operations that provide income for local employees, businesses, and communities, and that is what we sought to do throughout the year. In addition to our efforts to maintain safe operations, we have also supported public health efforts and provided COVID-19 relief funding, supplies and services to our neighbouring communities and the regions in which we operate.

Pampacancha and Constancia Satellite Properties

In February 2020, the community of Chilloroya formally approved a surface rights agreement with Hudbay for the Pampacancha satellite deposit located near the Constancia mine in Peru. Throughout the remainder of the year, we focused on negotiating individual agreements with those members of the Chilloroya community who made use of the Pampacancha lands and advancing the consultation process between the government and the Chilloroya community in accordance with Peru's Consulta Previa law. Despite challenges presented by the COVID-19 pandemic, the Consulta Previa process was completed at the end of the year, and, in early January 2021, we received the final mining permit for the development and operation of Pampacancha.

In January 2021, Hudbay commenced limited pre-development activities for Pampacancha, including haul road construction and site preparation work. The Company continues to advance discussions with the remaining land user family at Pampacancha. Pre-stripping activities are expected to commence once the remaining land user agreement has been completed.

On March 29, 2021, the Company released an updated mine plan for Constancia that reflects an increase in copper and gold production from 2022 to 2025 as the higher grades from the Pampacancha deposit enter the mine plan. The updated mine plan incorporates higher-grade reserves including the Constancia North pit extension. With the incorporation of Pampacancha and Constancia North, annual production at Constancia is expected to average approximately 102,000 tonnes of copper and 58,000 ounces of gold over the next eight years, an increase of 40% and 367%, respectively, from 2020 levels, which were partially impacted by an eight-week temporary mine interruption related to a government-declared state of emergency.

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In 2018, we acquired control of a large, contiguous block of mineral rights to explore for mineable deposits within trucking distance of the Constancia processing facility, including the past producing Caballito property and the highly prospective Maria Reyna and Kusiorcco properties. Exploration agreement discussions with the community of Uchucarcco on the Maria Reyna and Caballito properties are progressing and, in early 2021, we commenced drilling on the Quehuincha North high-grade skarn target located approximately 10 kilometres from Constancia's processing facilities.

Lalor Mine and New Britannia Project

On February 19, 2019, Hudbay announced the results from the first phase of our Snow Lake gold strategy which repositioned Lalor as a gold mine with precious metals contributing a majority of the life-of-mine revenues. This was the first mine plan to contemplate the processing of gold and copper gold ore from Lalor at the company's New Britannia mill starting in 2022, which has since been accelerated. Refurbishment activities at the gold plant continue to remain ahead of the original schedule with commissioning now expected to be completed in mid-2021.

Following drilling and engineering activities in 2019, on March 30, 2020, we announced the second phase of our Snow Lake gold strategy with the release of an integrated revised mine plan for the Snow Lake operations. This mine plan increased the annual gold production at Lalor and incorporated gold-rich regional deposits to support an 18 year operating life (ending in 2037), based solely on proven and probable reserves and a production rate of 4,500 tonnes per day at Lalor for the first ten years of the mine plan.

Over the past twelve months, we advanced the third phase of our Snow Lake gold strategy focused on expanding and further optimizing operations. On March 29, 2021, we released an updated mine plan for Snow Lake that increased annual gold production to over 180,000 ounces during the first six years of New Britannia's operation at a cash cost and sustaining cash cost, net of by-product credits, of $412 and $788 per ounce of gold, respectively. This enhanced mine plan incorporates the results from several optimization initiatives, including: increasing the production rate at Lalor to 5,300 tonnes per day once the 777 mine closes in 2022; increasing the throughput rate at the Stall mill to 3,800 tonnes per day; incorporating mineral reserves from the 1901 deposit into the mine plan; and implementing a recovery improvement project at the Stall mill to increase copper and precious metal recoveries. These mine plan enhancements optimize the processing capacity of the Snow Lake operations in a manner that maximizes the net present value of the operations. As a result of these initiatives, the production of gold, copper and silver are expected to increase by 18%, 34% and 27%, respectively, from 2022 to 2027 compared to the previous mine plan.

On May 7, 2020, we entered into a gold forward sale and prepay arrangement ("Gold Prepay") with a syndicate of our existing lenders whereby we received an upfront payment of $115 million in exchange for delivering a total of 79,954 gold ounces in 2022 and 2023 based on gold forward curve prices averaging approximately $1,682 per ounce. The Gold Prepay was executed to pre-fund substantially all of the capital costs to complete the New Britannia project. The capital costs are now expected to be approximately $13 million higher than the initial budget of $115 million due to project scope additions and COVID-19 related costs.

For additional information, see "Material Mineral Projects - Lalor".

Rosemont

Since the acquisition of the Rosemont project in 2014, Hudbay has completed an extensive work program and, in March 2017, we filed our first National Instrument 43-101 technical report for Rosemont. The technical report projected that Rosemont would have a 19-year mine life and generate an after-tax, unlevered IRR of 15.5%, based upon a long-term copper price of $3.00 per pound. For additional information, see "Rosemont Technical Report".

In the first half of 2019, Rosemont received the Section 404 Water Permit from the U.S. Army Corps of Engineers and the U.S. Forest Service ("USFS") approved Rosemont's Mine Plan of Operations ("MPO") following an extensive Environmental Impact Statement process. The issuance of the MPO was the final administrative step in the permitting process.

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During the first half of 2019, Hudbay also reached an agreement with United Copper & Moly LLC ("UCM") to acquire UCM's 7.95% joint venture interest in the Rosemont project, and all remaining earn-in rights, for $45 million, plus three annual installments of $10 million per year starting in 2022.

On July 31, 2019, the U.S. District Court for the District of Arizona ("Court") issued a ruling in two of the lawsuits challenging the U.S. Forest Service's issuance of the Final Record of Decision ("FROD") for the Rosemont project (the "US Mining Law Litigation"). The Court ruled to vacate and remand the FROD thereby delaying the expected start of construction of Rosemont. Following the Court's decision in the US Mining Law Litigation, Hudbay suspended its early works program at Rosemont and, as of September 30, 2019, recognized an after-tax impairment loss of $242.1 million related to Rosemont.

In December of 2019, Hudbay and the U.S. Department of Justice each filed a notice of appeal in respect of the Court's decision in the US Mining Law Litigation to the U.S. Ninth Circuit Court of Appeals. The appeal of the unprecedented Rosemont court decision continues to advance with final briefs filed in November 2020 and the oral hearing completed in early February 2021. A decision is expected later in 2021.

On February 10, 2020, the Court issued a ruling in the third lawsuit challenging the U.S. Forest Service's issuance of the FROD for the Rosemont mine. In this lawsuit, the plaintiffs challenged the Biological Opinion that was issued by the U.S. Fish and Wildlife Service and relied on by the U.S. Forest Service as part of the permitting process. The Court ruled to remand certain aspects of the U.S. Fish and Wildlife Service's analysis and findings related to the Biological Opinion back to the agencies for further review.

On March 24, 2021, the U.S. Army Corps of Engineers determined that Rosemont is not subject to the Clean Water Act and, as such, Rosemont does not require the Section 404 Water Permit that was the subject of a litigation claim that was commenced in 2019 and had since been stayed by the Court.

While the litigation is ongoing, Hudbay remains committed to advancing the Rosemont project and finding ways to unlock value for the benefit of all our stakeholders.

On March 29, 2021, Hudbay announced the intersection of high-grade copper sulphide and oxide mineralization at shallow depth on its Copper World properties located on wholly-owned patented mining claims within seven kilometres of Rosemont. The drill program was initiated in 2020 to confirm historical drilling in this past-producing copper region formerly known as Helvetia. After receiving encouraging initial results, the Company launched a larger drill program in early 2021 and has since doubled the number of drill rigs at site to six to further test the four known deposits at Copper World and the potential for additional mineralization.

Acquisition of Mason

On December 19, 2018, Hudbay completed the acquisition of Mason Resources Corp. ("Mason") and its wholly-owned Mason project in Nevada, by way of a plan of arrangement where Hudbay acquired all of the issued and outstanding common shares of Mason which it did not already own for C$0.40 per common share. The Mason project is a large greenfield copper deposit located in the historic Yerington District of Nevada and is one of the largest undeveloped copper porphyry deposits in North America, with measured and indicated resources comparable in size to Constancia and Rosemont.

Since acquiring Mason, Hudbay has consolidated a prospective package of patented and unpatented mining claims contiguous to the Mason project and has advanced a number of technical studies. Hudbay expects to release the results of its preliminary economic assessment of the Mason project in April 2021.

Waterton Settlement and Leadership Transition

On May 3, 2019, Hudbay entered into a settlement agreement with Waterton Global Resource Management, Inc. ("Waterton"), a significant shareholder, to resolve an ongoing proxy contest. Pursuant to the terms of the settlement, Hudbay and Waterton agreed upon eleven nominees for election at Hudbay's 2019 annual shareholders' meeting and customary standstill, voting support and other terms. On March 16, 2020, we agreed to amend certain of the standstill provisions of the agreement, and, in November 2020, the agreement expired. Waterton remains a significant shareholder of the company.

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As part of the Waterton agreement, Hudbay also agreed that, following the 2019 shareholders' meeting, the Company's Corporate Governance and Nominating Committee would initiate a process to identify a suitable successor to the Chair position. On October 3, 2019, Stephen A. Lang was appointed as Chair of Hudbay's Board of Directors, replacing Alan Hibben. Mr. Lang has over 40 years of experience in the mining industry, including engineering, development and production at gold, copper, coal and platinum group metals operations.

On January 22, 2020, Peter Kukielski was appointed Hudbay's President and CEO. Previously, Mr. Kukielski was serving as Interim President and CEO, following the resignation of Alan Hair in July 2019. Mr. Kukielski has more than 30 years of extensive global experience within the base metals, precious metals and bulk materials sectors. Most recently, he was President and Chief Executive Officer of Nevsun Resources Ltd. until its acquisition in December 2018.

Steve Douglas was appointed Hudbay's Senior Vice President and Chief Financial Officer, effective June 30, 2020, following the retirement of David Bryson. Mr. Douglas has over 25 years of resource industry and finance leadership experience. He was Senior Vice President and Chief Financial Officer at Agrium Inc. prior to its merger with Potash Corporation of Saskatchewan Inc. and served as Executive Vice President and Chief Integration Officer at its successor corporation, Nutrien Inc., until January 2019.

Refinancing of Senior Unsecured Notes and Credit Facilities

On August 31, 2020, we completed an amendment to our senior secured revolving credit facilities (the "Credit Facilities"). As a result of the amendment, the total available borrowings under the Credit Facilities was decreased to $400.0 million from $550.0 million to reflect our anticipated business requirements until July 2022 when the Credit Facilities mature. We also revised the financial maintenance covenants to align with our development plans for the Pampacancha and New Britannia projects.

On September 23, 2020, we completed an upsized offering of $600 million aggregate principal amount of 6.125% senior unsecured notes due 2029. The proceeds of this offering were used to redeem $400 million of our then outstanding 7.250% senior unsecured notes due 2023 and for general corporate purposes.

On March 8, 2021, we completed an offering of $600 million aggregate principal amount of 4.50% senior unsecured notes due 2026. The proceeds of this offering were used to redeem $600 million of our then outstanding 7.625% senior unsecured notes due 2025.

Following the bond refinancings, we have an aggregate of $1.2 billion of long-term debt (see "Description of Capital Structure").

DESCRIPTION OF OUR BUSINESS

GENERAL

We are a diversified mining company primarily producing copper concentrate (containing copper, gold, and silver), molybdenum concentrate and zinc metal. Directly and through our subsidiaries, we own three polymetallic mines, four ore concentrators and a zinc production facility in northern Manitoba and Saskatchewan (Canada) and Cusco (Peru), and copper projects in Arizona and Nevada (United States). Our growth strategy is focused on the exploration, development, operation and optimization of properties we already control, as well as other mineral assets we may acquire that fit our strategic criteria. Our vision is to be a responsible, top-tier operator of long-life, low-cost mines in the Americas. Our mission is to create sustainable value through acquisition, development and operation of high quality, long life deposits with exploration potential in jurisdictions that support responsible mining, and to see the regions and communities in which we operate benefit from our presence.

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We have four material mineral projects:

1.our 100% owned Constancia mine, an open pit copper mine in Peru, which achieved commercial production in the second quarter of 2015;

2.our 100% owned Lalor mine, an underground gold, zinc and copper mine near Snow Lake, Manitoba, which achieved commercial production in the third quarter of 2014;

3.our 100% owned Rosemont project, a copper development project in Pima County, Arizona; and

4.our 100% owned 777 mine, an underground copper, zinc, gold and silver mine in Flin Flon, Manitoba, which has been producing since 2004 and which is scheduled to close in 2022.

In addition, we own and operate a portfolio of processing facilities in northern Manitoba, including our primary Flin Flon ore concentrator, which produces zinc and copper concentrates, our Stall concentrator, which produces zinc and copper concentrates and our Flin Flon zinc plant, which produces special high-grade zinc metal and continuous galvanizing grade aluminum alloy zinc metal. In 2015, we acquired the New Britannia mill, located in Snow Lake, which we plan to refurbish and utilize, commencing later in 2021, as part of our revised Lalor mine plan. In Peru, we own and operate a processing facility at Constancia, which produces copper and molybdenum concentrates.

We also own a 100% interest in the Mason project, an early stage copper project in Nevada with a substantial mineral resource, and own or have an interest in exploration properties in close proximity to our material mineral projects. Among these are a large, contiguous block of mineral rights within trucking distance of the Constancia processing facility, including the past producing Caballito property and the highly prospective Maria Reyna and Kusiorcco properties, and a number of properties in the Snow Lake region within trucking distance of the Stall and New Britannia mills that have the potential to provide additional feed to the Lalor mine plan.

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The following map shows where our primary assets and certain exploration properties are located.

MATERIAL MINERAL PROJECTS

Constancia

Constancia is our 100% owned copper mine in Peru. It is located in the Province of Chumbivilcas in southern Peru and consists of the Constancia and Pampacancha deposits. The Constancia mine reached commercial production in the second quarter of 2015 and has an expected mine life of 17 years.

On February 18, 2020, the community of Chilloroya formally approved a surface rights agreement with Hudbay for the Pampacancha satellite deposit located near the Constancia mine in Peru. Throughout the remainder of 2020, we focused on negotiating individual agreements with those members of the Chilloroya community who made use of the Pampacancha lands and advancing the consultation process between the government and the Chilloroya community as per Peru's Consulta Previa law. Despite challenges presented by the COVID-19 pandemic, the Consulta Previa process was completed at the end of the year, and in early January 2021, the Peruvian regulators granted us the final mining permit for the development and operation of Pampacancha.

In January 2021, Hudbay commenced limited pre-development activities for Pampacancha including haul road construction and site preparation work. We continue to advance discussions with the remaining land user family at Pampacancha. Pre-stripping activities are expected to commence once the remaining land user agreement has been completed.

On March 29, 2021, the Company released an updated mine plan for Constancia that reflects an increase in copper and gold production from 2022 to 2025 as the higher grades from the Pampacancha deposit enter the mine plan. The updated mine plan incorporates higher-grade reserves including the Constancia North pit extension. With the incorporation of Pampacancha and Constancia North, annual production at Constancia is expected to average approximately 102,000 tonnes of copper and 58,000 ounces of gold over the next eight years, an increase of 40% and 367%, respectively, from 2020 levels, which were partially impacted by an eight-week temporary mine interruption related to a government-declared state of emergency.

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In 2018, we acquired control of a large, contiguous block of mineral rights to explore for mineable deposits within trucking distance of the Constancia processing facility, including the past producing Caballito property and the highly prospective Maria Reyna and Kusiorcco properties. Exploration agreement discussions with the community of Uchucarcco on the Maria Reyna and Caballito properties are progressing and, in early 2021, we commenced drilling on the Quehuincha North high-grade skarn target located approximately 10 kilometres from Constancia's processing facilities.

100% of the payable silver and 50% of the payable gold at Constancia is subject to a precious metals stream agreement with Wheaton Precious Metals. We receive cash payments equal to the lesser of (i) the market price and (ii) $400 per ounce (for gold) and $5.90 per ounce (for silver), subject to one percent annual escalation starting in 2019. Gold recovery for purposes of calculating payable gold is fixed at 55% for gold mined from Constancia and 70% for gold mined from Pampacancha.

On March 29, 2021, we filed a technical report titled "NI 43-101 Technical Report, Constancia Mine, Cuzco, Peru", effective as of January 1, 2021, prepared by Olivier Tavchandjian (our Vice President, Exploration and Geology) (the "Constancia Technical Report"), a copy of which is available under our profile on SEDAR at www.sedar.com and on EDGAR at www.sec.gov. For additional details on our Constancia mine, refer to Schedule B of this AIF.

Mineral Reserves and Resources

The following table sets forth our estimates of the mineral reserves at the Constancia mine.

Constancia Mineral Reserves - January 1, 2021(1)(2)(3)
	Tonnes	Cu (%)	Mo (g/t)	Au (g/t)	Ag (g/t)
Constancia
Proven	436,500,000	0.29	83	0.041	2.88
Probable	56,100,000	0.25	69	0.045	3.09
Total Proven and Probable	492,600,000	0.29	82	0.042	2.90
Pampacancha
Proven	32,400,000	0.59	178	0.368	4.48
Probable	7,500,000	0.62	173	0.325	5.75
Total Proven and Probable	39,900,000	0.60	177	0.360	4.72
Total Mineral Reserve	532,500,000	0.31	89	0.066	3.04

Notes:

1.Totals may not add up correctly due to rounding.

2.Metal prices of $3.10 per pound copper, $11.00 per pound molybdenum, $1,500 per ounce gold, and $18.00 per ounce silver were used to estimate mineral reserves.

3.Constancia mineral reserves are estimated using a minimum NSR cut-off of $6.14 per tonne and assuming metallurgical recoveries (applied by ore type) of 85.8% on average for the life of mine.

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The following table sets forth our estimates of the mineral resources (exclusive of mineral reserves) at the Constancia mine.

Constancia Mineral Resource Estimates (Exclusive of Mineral Reserves) - January 1, 2021(1)(2)(3)(4)(5)(6)
	Tonnes	Cu (%)	Mo (g/t)	Au (g/t)	Ag (g/t)
Constancia
Measured	125,200,000	0.22	65	0.038	2.11
Indicated	118,300,000	0.22	65	0.037	2.05
Inferred	46,600,000	0.30	73	0.054	2.72
Pampacancha
Measured	11,400,000	0.41	101	0.245	4.95
Indicated	6,000,000	0.35	84	0.285	5.16
Inferred	10,100,000	0.14	143	0.233	3.86
Total Measured & Indicated	260,900,000	0.23	67	0.052	2.27
Total Inferred	56,700,000	0.27	86	0.086	2.92

Notes:

1.Totals may not add up correctly due to rounding.

2.Mineral resources are exclusive of mineral reserves and do not have demonstrated economic viability.

3.Mineral resource estimates do not include factors for mining recovery or dilution.

4.Metal prices of $3.10 per pound copper, $11.00 per pound molybdenum, $1,500 per ounce gold, and $18.00 per ounce silver were used to estimate mineral resources.

5.Constancia mineral resources are estimated using a minimum NSR cut-off of $6.14 per tonne and assuming metallurgical recoveries (applied by ore type) of 85.8% on average for the life of mine.

6.Mineral resources are based on resource pit designs containing measured, indicated, and inferred mineral resources.

ANNUAL INFORMATION FORM | 14

The following chart shows Constancia production (tonnes and grade) for the last three years:

Note:

1.Production in 2020 was affected by an eight-week suspension of operations at Constancia following a government declared state of emergency in response to the COVID-19 pandemic.

Lalor

Our 100% owned Lalor mine is a gold, zinc and copper mine near the Town of Snow Lake in the province of Manitoba. Lalor is located approximately 208 kilometres by road east of Flin Flon, Manitoba.

The Lalor mine achieved commercial production in 2014 and the production rate has steadily ramped-up since that time.

In February 2019, Hudbay announced the results from the first phase of our Snow Lake gold strategy, which repositioned Lalor as a gold mine with precious metals contributing a majority of the life-of-mine revenues. This was the first mine plan to contemplate the processing of gold and copper gold ore from Lalor at the Company's New Britannia mill. Refurbishment activities at the gold plant are ahead of the original schedule with commissioning now expected to be completed in mid-2021. The New Britannia mill refurbishment costs are expected to be approximately $13 million higher than the initial budget of $115 million due to project scope additions and COVID-19 related costs.

Following drilling and engineering activities in 2019, on March 30, 2020, we announced the second phase of our Snow Lake gold strategy with the release of an extended 18 year mine plan (ending in 2037) for the Snow Lake operations (See "Three Year History" above).

Over the past twelve months, we advanced the third phase of our Snow Lake gold strategy focused on expanding and further optimizing operations. On March 29, 2021, we released an updated mine plan for Snow Lake that increased annual gold production to over 180,000 ounces during the first six years of New Britannia's operation at a cash cost and sustaining cash cost, net of by-product credits, of $412 and $788 per ounce of gold, respectively. This enhanced mine plan incorporates the results from several optimization initiatives, including: increasing the production rate at Lalor to 5,300 tonnes per day once the 777 mine closes in 2022; increasing the throughput rate at the Stall mill to 3,800 tonnes per day; incorporating mineral reserves from the 1901 deposit into the mine plan; and implementing a recovery improvement project at the Stall mill to increase copper and precious metal recoveries. These mine plan enhancements optimize the processing capacity of the Snow Lake operations in a manner that maximizes the net present value of the operations. As a result of these initiatives, the production of gold, copper and silver are expected to increase by 18%, 34% and 27%, respectively, from 2022 to 2027 compared to the previous mine plan.

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There also remains future upside to further enhance the Snow Lake operations through exploration opportunities and additional mill processing projects. Lalor contains 6.2 million tonnes of inferred mineral resources that have the potential to extend the Lalor mine's life beyond ten years and maintain a production rate of 5,300 tonnes per day beyond 2027. The 1901 deposit contains inferred gold resources that have the potential to be converted to a higher confidence category and incorporated into the mine plan and Hudbay's other mineral deposits in the Snow Lake region provide additional opportunities to optimize the operations. The Company is also in the early stages of exploring other metallurgical projects, including the potential to treat the tails from Stall to recover additional gold and the potential to expand the New Britannia mill to its historical rate of 2,000 tonnes per day.

On March 29, 2021, we filed an updated NI 43-101 technical report titled "NI 43-101 Technical Report, Lalor and Snow Lake Operations, Manitoba, Canada", effective as of January 1, 2021, prepared by Olivier Tavchandjian (our Vice President, Exploration and Geology) (the "Lalor Technical Report"), a copy of which is available under our profile on SEDAR at www.sedar.com and on EDGAR at www.sec.gov. For additional details on our Lalor mine, refer to Schedule B of this AIF.

Mineral Reserves and Resources

The following table sets forth our estimates of the mineral reserves at the Lalor mine and 1901 deposit.

Lalor and 1901 Mineral Reserve Estimates - January 1, 2021(1)(2)(3)(4)
	Tonnes	Cu (%)	Zn (%)	Au (g/t)	Ag (g/t)
Base Metal Zone
Proven	7,740,000	0.49	5.88	2.5	29.2
Probable	1,880,000	0.50	6.23	2.6	31.1
Gold Zone
Proven	3,950,000	0.60	1.03	5.2	27.7
Probable	3,630,000	1.16	0.53	5.7	27.9
Total Proven and Probable	17,200,000	0.66	3.68	3.8	28.8

Notes:

1.Totals may not add up correctly due to rounding.

2.Metal prices of $1.10 per pound zinc, $1,500 per ounce gold, $3.10 per pound copper, and $18.00 per ounce silver with an exchange rate of 1.30 C$/US$ were used to confirm the economic viability of the mineral reserve estimates.

3.Mineral reserves are estimated using a minimum NSR cut-off of C$105 per tonne for waste filled mining areas and a minimum of C$116 per tonne for paste filled mining areas.

4.For Lalor, individual stope gold grades were capped at 10 grams per tonne, as a prudent estimate until reserves to mill reconciliations can establish that the high-grade gold can indeed be entirely recovered. This capping method resulted in the reduction of the global gold reserve grade by approximately 3%.

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The following table sets forth our estimates of the mineral resources (exclusive of mineral reserves) at the Lalor mine and 1901 deposit.

Lalor and 1901 Mineral Resource Estimates (Exclusive of Mineral Reserves) - January 1, 2021(1)(2)(3)(4)(5)(6)(7)
	Tonnes	Cu (%)	Zn (%)	Au (g/t)	Ag (g/t)
Base Metal Zone
Inferred	890,000	0.50	4.49	2.5	44.6
Gold Zone
Inferred	6,090,000	1.13	0.37	4.8	26.9
Total Inferred	6,990,000	1.05	0.89	4.5	29.2

Notes:

1.Totals may not add up correctly due to rounding.

2.Mineral resources that are not mineral reserves do not have demonstrated economic viability.

3.Mineral resources in the above tables do not include mining dilution or recovery factors.

4.Base metal mineral resources are estimated based on the assumptions that they would be processed at the Stall concentrator while gold mineral resources are estimated based on the assumption that they would be processed at the New Britannia concentrator, which is currently being refurbished.

5.Metal prices of $1.10 per pound zinc, $1,500 per ounce gold, $3.10 per pound copper, and $18.00 per ounce silver with an exchange rate of 1.30 C$/US$ were used to estimate mineral resources at Lalor.

6.1901 mineral resources were initially estimated using metal price assumptions that vary marginally over the assumptions used to estimate mineral resources at Lalor. In the Qualified Person's opinion, the combined impact of these small variations does not have any impact on the mineral resource estimates.

7.Mineral resources are estimated using a minimum NSR cut-off of C$105 per tonne for waste filled mining areas and a minimum of C$116 per tonne for paste filled mining areas.

Production

The following charts show Lalor production (tonnes and grade) for the last three years:

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Rosemont

Our 100% owned Rosemont project is a copper development project, located in Pima County, Arizona, approximately 50 kilometres southeast of Tucson. The Rosemont project is designed to be an open pit, shovel and truck operation and has an expected 19-year mine life. Rosemont is expected to generate an after-tax, unlevered IRR of 15.5%, using a long-term copper price of $3.00 per pound, with a capital cost estimate of $1.921 billion based on our technical report for Rosemont filed in March 2017. Rosemont is subject to a precious metals stream agreement with Wheaton that contemplates an upfront initial deposit of $230 million following the receipt of permits, finalization of the financing plan and commencement of construction, in exchange for delivery of approximately 100% of payable silver and gold produced from Rosemont at a cash price of $450 per ounce for gold and $3.90 per ounce for silver, subject to escalation for inflation.

In the first half of 2019, Rosemont received the Section 404 Water Permit from the U.S. Army Corps of Engineers and the USFS approved Rosemont's MPO following an extensive Environmental Impact Statement process. The issuance of the MPO was the final administrative step in the permitting process. During the first half of 2019, Hudbay also reached an agreement with UCM to acquire UCM's 7.95% joint venture interest in the Rosemont project, and all remaining earn-in rights, for $45 million, plus three annual installments of $10 million per year.

On July 31, 2019, the U.S. District Court for the District of Arizona issued a ruling in two of the lawsuits challenging the U.S. Forest Service's issuance of the FROD for the Rosemont project (the "US Mining Law Litigation"). The Court ruled to vacate and remand the FROD thereby delaying the expected start of construction of Rosemont.

In December of 2019, Hudbay and the U.S. Department of Justice each filed a notice of appeal in respect of the Court's decision in the US Mining Law Litigation to the U.S. Ninth Circuit Court of Appeals. The appeal of the unprecedented Rosemont court decision continues to advance with final briefs filed in November 2020 and the oral hearing completed in early February 2021. A decision is expected later in 2021. For a summary of the other litigation currently affecting the Rosemont project and the U.S. Army Corps of Engineers' recent jurisdictional determination in respect of the Section 404 Water Permit, refer to "Three Year History" above.

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While the litigation is ongoing, Hudbay remains committed to advancing the Rosemont project and finding ways to unlock value for the benefit of all our stakeholders.

On March 29, 2021, Hudbay announced the intersection of high-grade copper sulphide and oxide mineralization at shallow depth on its Copper World properties located on wholly-owned patented mining claims within seven kilometres of Rosemont. The drill program was initiated in 2020 to confirm historical drilling in this past-producing copper region formerly known as Helvetia. After receiving encouraging initial results, the Company launched a larger drill program in early 2021 and has since doubled the number of drill rigs at site to six to further test the four known deposits at Copper World and the potential for additional mineralization.

On March 30, 2017, we filed a technical report titled "NI 43-101, Feasibility Study, Updated Mineral Resource, Mineral Reserve and Financial Estimates, Rosemont Project, Pima County, Arizona, USA", effective as of March 30, 2017, prepared by Cashel Meagher, P. Geo (our Chief Operating Officer) (the "Rosemont Technical Report"), a copy of which is available under our profile on SEDAR at www.sedar.com and on EDGAR at www.sec.gov. For additional details on our Rosemont project, refer to Schedule B of this AIF.

Mineral Reserves and Resources

The following table sets forth our estimates of the mineral reserves at the Rosemont project.

Rosemont Mineral Reserve Estimates - January 1, 2021 (1)(2)(3)
	Tonnes	Cu (%)	Mo (g/t)	Ag (g/t)
Proven	426,100,000	0.48	120	4.96
Probable	111,000,000	0.31	100	3.09
Total Proven and Probable	537,100,000	0.45	120	4.58

Notes:

1.Blocks were classified as Proven or Probable in accordance with CIM Definition Standards 2014.

2.US$3.15 per pound copper, US$11.00 per pound molybdenum and US$18.00 per ounce of silver were used. Metallurgical recoveries of 90% copper, 63% molybdenum and 75.5% silver were applied. No metallurgical recovery of molybdenum and silver from oxide ore is projected. A $6.60 NSR cut-off grades was based on process recoveries, total processing, and general and administrative operating costs per tonne.

3.Based on 100% ownership of the Rosemont project.

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The following table sets forth our estimates of the mineral resources (exclusive of mineral reserves) at the Rosemont project.

Rosemont Mineral Resource Estimates (Exclusive of Mineral Reserves) - January 1, 2021(1)(2)(3)
	Tonnes	Cu (%)	Mo (g/t)	Ag (g/t)
Measured	161,300,000	0.38	90	2.72
Indicated	374,900,000	0.25	110	2.60
Total Measured & Indicated	536,200,000	0.29	110	2.64
Total Inferred	62,300,000	0.30	100	1.58

Notes:

1.Mineral resources that are not mineral reserves do not have demonstrated economic viability. Please refer to Schedule A "Glossary of Mining Terms".

2.Mineral resources are constrained within a computer generated pit using the Lerchs-Grossman algorithm. Estimates of mineral resources exclude mineral reserves and are based on the following long-term metals prices: $3.15 per pound of copper; $11.00 per pound of molybdenum; and $18.00 per ounce of silver. Metallurgical recoveries of 85% copper, 60% molybdenum and 75% silver were applied to sulfide material. Metallurgical recoveries of 40% copper, 30% molybdenum and 40% silver were applied to mixed material. A metallurgical recovery of 65% for copper was applied to oxide material. NSR was calculated for every model block and is an estimate of recovered economic value of copper, molybdenum, and silver combined. Cut-off grades were set in terms of NSR based on current estimates of process recoveries, total processing and general and administrative operating costs of $6.10 per tonne for oxide, mixed and sulfide material.

3.Based on 100% ownership of the Rosemont project.

777 mine

Our 100% owned 777 mine is an underground copper, zinc, gold and silver mine located within the Flin Flon Greenstone Belt, immediately adjacent to our principal concentrator and zinc pressure leach plant in Flin Flon, Manitoba. Development of the 777 mine commenced in 1999 and commercial production began in 2004. Based on the most recent estimate of mineral reserves, the 777 mine will close in the second quarter of 2022.

Ore produced at the 777 mine is transported to our Flin Flon concentrator for processing into copper and zinc concentrates. In the fourth quarter of 2020, we safely resumed full production at the 777 mine following a temporary production interruption due to an incident that occurred during routine maintenance of the hoist rope and skip. The shaft repairs were completed ahead of schedule and the repair costs were below the initial estimate.

Pursuant to the precious metals stream agreement we entered into with Wheaton Precious Metals in respect of the 777 mine, we are required to deliver 50% of the payable gold and 100% of the payable silver from the 777 mine and receive fixed payments equal to the lesser of (i) the market price and (ii) $400 per ounce (for gold) and $5.90 per ounce (for silver), subject to one percent annual escalation that started in 2015.

On November 6, 2012, we filed a NI 43-101 technical report titled "Technical Report, 777 mine, Flin Flon, Manitoba, Canada", prepared by Brett Pearson, P. Geo., Darren Lyhkun, P. Eng., Cassandra Spence, P. Eng., Stephen West, P. Eng. and Robert Carter, P. Eng. and dated effective October 15, 2012 (the "777 Technical Report"), a copy of which is available under our profile on SEDAR at www.sedar.com and on EDGAR at www.sec.gov. For additional details on our 777 mine refer to Schedule B of this AIF.

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Mineral Reserves and Resources

The following table sets forth our estimates of the mineral reserves at the 777 mine.

777 Mineral Reserve Estimates - January 1, 2021(1)(2)
	Tonnes	Cu (%)	Zn (%)	Au (g/t)	Ag (g/t)
Base Metal Zone
Proven	1,125,000	1.59	5.09	2.23	31
Probable	399,000	1.11	4.46	1.86	30
Total Proven and Probable	1,524,000	1.46	4.93	2.13	31

Notes:

1.Totals may not add up correctly due to rounding.

2.Life of mine (2021-2022) average zinc price of $1.04 per pound (includes premium), copper price of $2.90 per pound, gold price of $1,767 per ounce and silver price of $20.67 per ounce using an exchange rate of 1.30 C$/US$ was used to estimate mineral reserves and mineral resources.

The following table sets forth our estimates of the mineral resources (exclusive of mineral reserves) at the 777 mine.

777 Mineral Resource Estimates (Exclusive of Mineral Reserves) - January 1, 2021(1)(2)(3)
	Tonnes	Cu (%)	Zn (%)	Au (g/t)	Ag (g/t)
Measured	120,000	1.21	7.11	2.31	39
Indicated	90,000	1.77	4.82	1.61	31
Total Measured and Indicated	210,000	1.45	6.13	2.01	35
777 Inferred Mineral Resources - January 1, 2021(1)(2)(3)
	Tonnes	Cu (%)	Zn (%)	Au (g/t)	Ag (g/t)
Inferred	-	-	-	-	-

Notes:

1.Totals may not add up correctly due to rounding.

2.Life of mine (2021-2022) average zinc price of $1.04 per pound (includes premium), copper price of $2.90 per pound, gold price of $1,767 per ounce and silver price of $20.67 per ounce using an exchange rate of 1.30 C$/US$ was used to estimate mineral reserves and mineral resources.

3.Mineral resources that are not mineral reserves do not have demonstrated economic viability. Please refer to Schedule A "Glossary of Mining Terms".

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Production

The following charts show 777 production (tonnes and grade) for the last three years:

Note:

1.2020 production was affected by a six-week suspension of hoisting operations due to an incident that occurred during routine maintenance.

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OTHER ASSETS

Snow Lake Regional Deposits

As discussed under "Lalor" above, the mineral reserves and resources at Hudbay's satellite deposits in the Snow Lake region, including the copper-gold WIM deposit, the gold-rich 3 Zone and the zinc-rich Watts, Pen II and Talbot deposits, have the potential to provide future feed for the Stall and New Britannia processing facilities and further extend the life of the Snow Lake operations.

The following table sets forth our estimates of the mineral reserves and resources at the Snow Lake regional deposits (excluding Lalor and 1901).

Snow Lake Regional Gold Deposits Mineral Reserve Estimates - January 1, 2021(1)(2)(3)(4)
	Tonnes	Cu (%)	Zn (%)	Au (g/t)	Ag (g/t)
Probable Reserves
WIM	2,450,000	1.63	0.25	1.6	6.3
3 Zone	660,000	0.00	0.00	4.2	0.0
Total Probable (Gold)	3,110,000	1.28	0.20	2.2	5.0

Notes:

1.Totals may not add up correctly due to rounding.

2.Metal prices of $1.10 per pound zinc, $1,500 per ounce gold, $3.10 per pound copper, and $18.00 per ounce silver with an exchange rate of 1.30 C$/US$ were used to confirm the economic viability of the mineral reserve estimates.

3.WIM mineral reserves are estimated using a minimum NSR cut-off of C$150 per tonne, assuming processing recoveries of 98% for copper, 88% for gold, and 70% for silver based on processing through New Britannia's flotation and tails leach circuits.

4.3 Zone mineral reserves are estimated using a minimum NSR cut-off of C$150 per tonne, assuming processing recoveries of 85% for gold based on processing through New Britannia's leach circuit.

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Snow Lake Regional Gold Deposits Mineral Resource Estimates- January 1, 2021(1)(2)(3)(4)(5)
	Tonnes	Cu (%)	Zn (%)	Au (g/t)	Ag (g/t)
Inferred Resources
(Exclusive of Mineral Reserves)
Birch	570,000	0.00	0.00	4.4	0.0
New Britannia	2,750,000	0.00	0.00	4.5	0.0
Total Inferred (Gold)	3,320,000	0.00	0.00	4.5	0.0

Snow Lake Regional Base Metal Deposits Mineral Resource Estimates - January 1, 2021(1)(2)(3)(4)(5)(6)(7)(8)(9)
	Tonnes	Cu (%)	Zn (%)	Au (g/t)	Ag (g/t)
Indicated Resources
(Exclusive of Mineral Reserves)
PEN II	470,000	0.49	8.89	0.3	6.8
Talbot	2,190,000	2.33	1.79	2.1	36.0
Total Indicated (Base Metals)	2,660,000	2.01	3.04	1.8	30.9
Inferred Resources
(Exclusive of Mineral Reserves)
Watts	3,150,000	2.34	2.58	1.0	31.0
PEN II	130,000	0.37	9.81	0.3	6.8
Talbot	2,450,000	1.13	1.74	1.9	25.8
Total Inferred (Base Metals)	5,730,000	1.78	2.39	1.3	28.3

Notes:

1.Totals may not add up correctly due to rounding.

2.Mineral resources that are not mineral reserves do not have demonstrated economic viability.

3.Mineral resources in the above tables do not include mining dilution or recovery factors.

4.Base metal mineral resources are estimated based on the assumption that they would be processed at the Stall concentrator while gold mineral resources are estimated based on the assumption that they would be processed at the New Britannia concentrator, which is currently being refurbished.

5.New Britannia mineral resource estimates have been reported at a minimum true width of 1.5 metres and with a cut-off grade varying from 2 grams per tonne (at the lower part of New Britannia) to 3.5 grams per tonne (at the upper part of New Britannia).

6.Watts and Pen II mineral resources were initially estimated using metal price assumptions that vary marginally over the assumptions used to estimate mineral resources at Lalor. In the Qualified Person's opinion, the combined impact of these small variations does not have any impact on the mineral resource estimates.

7.Watts mineral resources are estimated using a minimum NSR cut-off of C$150 per tonne, assuming processing recoveries of 90% for copper, 80% for zinc, 70% for gold and 70% for silver.

8.Pen II mineral resources are estimated using a minimum NSR cut-off of C$75 per tonne.

9.The above resource estimates table includes 100% of the Talbot mineral resources reported by Rockcliff Metals Corp. in its 2020 NI 43-101 technical report published on SEDAR. Hudbay currently owns a 51% interest in the Talbot project.

Mason Project

The Mason project is a large greenfield copper deposit located in the historic Yerington District of Nevada and is one of the largest undeveloped copper porphyry deposits in North America. The Mason project's measured and indicated mineral resources are comparable in size to Constancia and Rosemont. We view the Mason project as a long-term option for potential future development and a strong addition to our pipeline of long-term growth opportunities. The Mason project is one of our high priority exploration projects in North America and we have been active in taking steps to optimize this opportunity.

Since acquiring Mason, Hudbay has consolidated a prospective package of patented and unpatented mining claims contiguous to the Mason project and has advanced a number of technical studies. Hudbay expects to release the results of its preliminary economic assessment of the Mason project in April 2021 based on a revised resource model and an updated mine plan constructed by Hudbay personnel using the same methods applied at Constancia.Based on this new model, including resource classification criteria calibrated on historical performance at Constancia, control of grade over-smoothing in the central zone of the deposit and the use of a lower cut-off grade, the measured and indicated resources have increased to 2.2 billion tonnes at 0.29% copper, from 1.4 billion tonnes at 0.32% copper previously.

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The following table sets forth the estimates of the mineral resources at the Mason project.

Mason Project Mineral Resource Estimates - January 1, 2021(1)(2)(3)(4)(5)
	Tonnes	Grade
		Cu (%)	Mo (g/t)	Au (g/t)	Ag (%)
Measured	1,417,000,000	0.29	59	0.031	0.66
Indicated	801,000,000	0.30	80	0.025	0.57
Total Measured and Indicated	2,219,000,000	0.29	67	0.029	0.63
Inferred	237,000,000	0.24	78	0.033	0.73

Notes:

1.Totals may not add up correctly due to rounding.

2.Mineral resource estimates do not include factors for mining recovery or dilution.

3.Metal prices of $3.10 per pound copper, $11.00 per pound molybdenum, $1,500 per ounce gold, and $18.00 per ounce silver were used to estimate mineral resources.

4.Mason mineral resources are estimated using a minimum NSR cut-off of $6.25 per tonne.

5.Mineral resources are based on resource pit designs containing measured, indicated, and inferred mineral resources.

Processing Facilities

Manitoba Business Unit

Our Flin Flon concentrator has throughput capacity of approximately 6,000 tonnes of ore per day, and produces zinc and copper concentrates primarily from ore mined at our 777 mine. From time to time, a portion of the ore mined from our Lalor mine is transported to the Flin Flon concentrator for processing. The Flin Flon concentrator facility includes a paste backfill plant and associated infrastructure such as maintenance shops and laboratories. Tailings from the concentrator are utilized as paste backfill or pumped to the Flin Flon tailings impoundment immediately adjacent to the concentrator. We expect the Flin Flon concentrator and tailings impoundment to be put on care and maintenance around the time the 777 mine closes in mid-2022.

Our zinc plant in Flin Flon, Manitoba produces special high-grade zinc metal and continuous galvanizing grade aluminum alloy zinc metal in three cast shapes from zinc concentrate. We produced 111,637 tonnes of cast zinc in 2020 and the capacity of the zinc plant is approximately 112,000 tonnes of cast zinc per year. Included in the zinc plant are an oxygen plant, powerhouse, a concentrate handling and storage facility, a zinc pressure leach plant, a solution purification plant, an electro-winning cellhouse, a casting plant, and a zinc storage area with the ability to load trucks or rail cars. The zinc plant has a dedicated leach residue disposal facility. The bulk of the waste material is tailings cake residues containing gypsum, iron, and sulphur. Wastewater is treated and recycled through the zinc plant. We expect the zinc plant to be closed around the time the 777 mine closes in mid-2022.

Our Stall concentrator in Snow Lake, Manitoba was re-started in 2009 and a new copper recovery circuit was installed in the third quarter of 2012 to facilitate processing of Lalor ore. In 2014, we refurbished equipment and facilities at the Stall concentrator, and in 2020 the concentrator processed 3,871 tonnes per day of ore production from the Lalor mine to produce zinc and copper concentrates. The zinc concentrate is shipped by truck for further processing at our zinc plant in Flin Flon. Once the zinc plant closes in mid-2022, the zinc concentrate will be sold to third party customers. The majority of the tailings produced from the Stall mill are pumped to the Lalor paste plant, where it is dewatered, mixed with cement and sent underground as pastefill. If pastefill is not required, the tailings are diverted to the Anderson tailings impoundment area. In 2020, Hudbay completed a feasibility study and a test program exploring various technological upgrades to the flowsheet at the Stall mill. The total cost to implement these upgrades is estimated to be $19 million (C$24 million) and is expected to increase Stall's copper recoveries to between 91% and 95%, gold recoveries to between 64% and 70%, and silver recoveries to between 65% and 74%, a significant increase from the previous assumed recoveries of 84% copper, 53% gold and 53% silver. The project is expected to commence in 2022 and be in operation by early 2023.

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In 2015, Hudbay acquired a 100% interest in the New Britannia mine and mill, located in Snow Lake, Manitoba. The refurbishment of the New Britannia mill, including the addition of a copper flotation circuit, to optimize processing of the Lalor gold and copper gold ores, is ahead of the original schedule and commissioning of the gold mill is now expected to be completed in mid-2021 (See "Material Mineral Projects - Lalor".).

Peru Business Unit

Our processing plant at Constancia has a nominal throughput capacity of 90,000 dry metric tonnes per day of ore at 94% plant mechanical availability. We have improved the performance of the plant over time through technology and process improvements and plan to continue to implement such initiatives. The principal product of the concentrator is copper concentrate, although it also produces molybdenum concentrate. The primary crusher, belt conveyors, thickeners, tanks, flotation cells, mills and various other types of equipment are designed and constructed to be open to the environment. The concentrate filtration and storage building is enclosed. The tailings are pumped to the tailings management facility for storage and water is returned via parallel piping to the process plant for reuse.

Production

The following charts show production of contained metal in concentrate (tonnes/ounces) for our Constancia, Flin Flon and Stall concentrators for the last three years:

Note:

1.Production in 2020 was affected by an eight-week suspension of operations at Constancia following a government declared state of emergency in response to the COVID-19 pandemic.

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Note:

1.The Reed copper mine closed in 2018.

2.Production in 2020 was affected by a six-week interruption at the 777 mine.

Tailings Management Facilities

We have seven tailings and water retainment structures and facilities, four in Manitoba and three at Constancia. The Flin Flon tailings impoundment area ("FFTIA") is the only one with partial construction using the upstream construction design method. More recent dam expansions at the FFTIA have been constructed using the downstream method. Our Anderson tailings management facility in Snow Lake has historically used subaqueous deposition of tailings. In order to accommodate ongoing production from our Lalor mine, we are in the process of raising the dam around Anderson using the downstream method. Our Constancia tailings facility was constructed utilizing a downstream method which created a solid rockfill platform foundation. This foundation supports ongoing centerline construction which will continue until the end of the operating life of the structure.

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We established an Independent Peer Review Board ("IPRB") for our Constancia tailings management facilities in 2012 and extended this to our Manitoba Business Unit's facilities in 2017. In 2018, we developed a Tailings Governance Charter to further strengthen our internal governance processes related to tailings management. The charter details existing controls, including a Tailings Management System at the site or business unit that supports day-to-day activities such as planning, monitoring, risk identification and reporting. We conduct independent external reviews, which may include Engineer of Record inspections, IPRB reports and compliance audits. The Manitoba and Peru Business Units are currently rated "AA" across all the tailings management indicators in the Mining Association of Canada's Towards Sustainable Mining ("TSM") program. In addition to maintaining a minimum of an "A" rating on all five TSM tailings indicators, we also ensure tailings facilities are constructed following the Canadian Dam Safety Guidelines. We believe following these well established standards provides substantial alignment to the recently introduced Global Tailings Standard.

At our Manitoba Business Unit, where some of our tailings storage facilities were built 80 years ago, we have worked with our engineer of record, with input from our IPRB, to identify opportunities to proactively upgrade facilities to increase the factor of safety of the structures over a three year period, particularly in areas previously constructed using the upstream method. We expect to spend approximately $20 million per year from 2020 to 2022 to implement improvements and increase the safety factor of these tailings facilities. The tailings improvement projects are on schedule and we expect to complete them by the end of 2022.

At our Rosemont project in Arizona, the current design includes an alternative method of tailings disposal called dry stack or filtered tailings. This method offers advantages over other tailings storage options, provided climactic conditions support the technology. Advantages include reduced water consumption, smaller land footprint and an ability to conduct concurrent reclamation. Dry stack also reduces the risk of groundwater contamination and dam breaches.

Exploration

Hudbay has an exploration portfolio of owned or optioned mineral properties which consists of approximately 840,000 hectares across Canada, Peru, the United States and Chile. Hudbay's 2021 exploration budget of $40 million, which includes option payments, will be focused on exploration near existing processing infrastructure in Manitoba and Peru, as well as the Helvetia district next to Rosemont.

In Peru, the company expects to conduct exploration drilling on skarn targets in areas close to the Constancia mine as well as for the definition of a porphyry deposit at the greenfield Llaguen project, located near the city of Trujillo in northwestern Peru where Hudbay has been successful in reaching a community agreement. In Manitoba, the company expects to conduct more underground drilling at Lalor to support the long-term gold strategy in Snow Lake as well as surface drilling to expand its gold and base metal resource base.

In the fourth quarter of 2020, we completed the initial drill program on our wholly owned private land located near Rosemont in a historic mining district, known as Copper World (formerly Helvetia). The focus of the program was to confirm historical drilling and test four known deposits at Hudbay's Copper World properties. The drill program consisted of 60 holes with several intersecting sulphide and oxide mineralization that contains higher grades and is closer to surface than at Rosemont. Based on the positive results of the initial drill program, in 2021, we commenced a second phase of exploration drilling with a larger program using double the number of rigs. The 2021 drill program will focus on understanding the full extent of the mineralization at the Copper World deposits and potentially defining initial mineral resource estimates. Mineralogical studies, metallurgical testing and geophysical surveys are underway.

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Exploration activities elsewhere consists of geological mapping, geochemical sampling and geophysical surveys.

Strategic Investments

As at December 31, 2020, we held minority equity positions in 13 junior exploration companies, representing investments with a fair market value of approximately $20 million, as part of our strategy to populate a pipeline of projects with the potential for exploration and development. Our early stage opportunity pipeline consists of minority interests in junior exploration companies with projects in Canada, the United States, Chile and Peru. We are continuing to evaluate new projects and potential investments to add to our portfolio and will seek to dispose of investments when the underlying projects are no longer consistent with our strategy.

Cash and Cash Equivalents

Our cash and cash equivalents as of December 31, 2020 were $439.1 million, and are held in low risk liquid investments and deposit accounts pursuant to our investment policy.

OTHER INFORMATION

Products and Marketing

Our principal products are copper concentrate, which contains payable copper, gold and silver, zinc concentrate, refined zinc metal and molybdenum concentrate. In 2020, we produced 426,733 tonnes of copper concentrate (321,395 tonnes from Constancia and 105,338 tonnes from our operations in Manitoba), 233,094 tonnes of zinc concentrate, the majority of which was processed in our Flin Flon zinc plant facility to produce 111,631 tonnes of cast zinc, and 2,423 tonnes of molybdenum concentrate. Once the New Britannia gold mill is commissioned, we will also produce doré containing gold and silver.

In 2020, copper concentrate sales represented approximately 53% (2019 - 58%), zinc sales represented approximately 25% (2019 - 21%) and molybdenum sales represented approximately 2% (2019 - 2%), of our total gross consolidated revenue (which excludes mark-to-market adjustments on provisionally priced sales, realized and unrealized changes to fair value for non-hedge derivative contracts, adjustments to originally invoiced weights and assays and variable consideration adjustments).

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Our 2020 revenue breakdown by commodity type is illustrated in the chart below:

2020 REVENUE BREAKDOWN

Notes:

1.Revenue for the full year ended December 31, 2020. Gold and silver revenues include deferred revenue and cash payments applicable to precious metals stream sales.

2.This number excludes treatment and refining charges.

In 2020, approximately 79% (55% in 2019) of our copper concentrate sales were to third party purchasers at benchmark terms and for 2021 this is expected to decline to approximately 61%. The majority of the balance of our copper concentrate production is sold pursuant to shorter-term contracts (one to two years) at spot market terms. Manitoba copper concentrate production is sold for delivery to a smelter in Canada, while Peru copper concentrate production is primarily sold for delivery to smelters in Asia, with the balance delivered within South America and Europe.

There were no sales of zinc concentrate in 2020.

All molybdenum concentrate production in 2020 was sold to third party purchasers under long-term contracts and was delivered to roasters in South America and Asia.

We sell gold and silver equal to the deliverable portion of payable gold and silver produced from our 777 and Constancia mines to Wheaton Precious Metals pursuant to the terms of the precious metals stream agreements in respect of our 777 and Constancia mines.

We ship cast zinc metal produced at our Flin Flon zinc plant by rail and truck to third party customers in North America.

Commodity Markets

In addition to our production, financial performance is directly affected by a number of factors, including metals prices, foreign exchange rates, and input costs, including energy prices. Average prices for copper and zinc were far more volatile in 2020 than they were in 2019 due to the adverse effect of the COVID-19 pandemic on the world economy. Government mandated lockdowns and a rapid decline in the value of all assets drove copper and zinc prices to multiyear lows in the first quarter of 2020 before temporary supply side disruptions and scrap shortages, central bank liquidity injections and improved market sentiment propelled prices, especially copper, to levels significantly higher than prior to the pandemic. Gold prices, except for a brief decline in March 2020 when all asset prices suffered steep declines, moved higher through the last three quarters of the year due to the COVID-19 crisis and the world's response to it.

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For additional information refer to our market analysis of copper and zinc prices on pages 28 and 29 of our management's discussion and analysis for the year ended December 31, 2020, a copy of which has been filed on SEDAR at www.sedar.com and on EDGAR at www.sec.gov.

Specialized Skill and Knowledge

The success of our operations depends in part on our ability to attract and retain geologists, engineers, metallurgists and other personnel with specialized skill and knowledge about the mining and mineral processing industries in the geographic areas in which we operate. For additional information, see "Risk Factors - Recruitment, Retention and Labour Relations".

Competitive Conditions

The mining industry is intensely competitive and we compete with many companies in the search for and acquisition of attractive mineral properties. In addition, we also compete for the technical expertise to find, develop, and operate such properties, the labour to operate the properties, and the capital for the purpose of funding such properties. For additional information, see "Risk Factors - Competition".

Economic Dependence

We do not have any contracts upon which our business is substantially dependent, as our principal products, copper concentrate, zinc concentrate and refined zinc metal are widely traded commodities and we may enter into contracts for the sale of such products with a variety of potential purchasers.

Environmental Protection

Our activities are subject to environmental laws and regulations. Environmental laws and regulations are evolving in a manner that will require stricter standards and enforcement, increased fines and penalties for non-compliance, more stringent environmental assessments of proposed projects and a heightened degree of responsibility for companies and their officers, directors and employees. For additional information, see "Risk Factors - Governmental and Environmental Regulation".

Our goal is to continue to improve our environmental performance and we have an environmental management program directed at environmental protection and compliance to achieve our goal and address these regulatory changes. For additional information, see "Tailings Management Facilities" above and "Sustainability" and, in particular, our commitment to follow the TSM program of the Mining Association of Canada at all of our operating locations.

Employees

As at December 31, 2020, we had 76 employees at our Toronto head office, 1,475 employees in Manitoba, 948 employees in Peru and 31 employees in Arizona.

Our three-year collective bargaining agreements with the unionized workforces at our Manitoba and Peru operations expired at the end of 2020; negotiations for new collective agreements at each of our operations are ongoing. Unionized workers represented approximately 74% of our employees in Manitoba and 32% of our employees in Peru as at December 31, 2020.

Hudbay maintains a profit sharing plan pursuant to which 10% of the after-tax profit of the Manitoba Business Unit (excluding provisions or recoveries for deferred income and mining tax) for any given year is distributed among eligible employees in the Flin Flon/Snow Lake operations, with the exception of executive officers and key management personnel.

In accordance with Peruvian law, Hudbay distributes 8% of the after-tax profit of the Peru Business Unit amongst all employees in Peru, including executive officers and key management personnel.

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SUSTAINABILITY

At Hudbay, we view responsible corporate behaviour as integral to the successful execution of our business strategy. In particular, we pride ourselves on maintaining a good reputation with our regulators, communities and other stakeholders and being able to bring that good reputation to new communities and jurisdictions when we embark on new projects. Our mission includes that the regions and communities in which we operate benefit from our presence, meaning that we create benefits and opportunities that contribute to their economic and social wellbeing, and that we protect our natural environment. We also commit to our employees to maintain a safe and healthy work environment. As described below, we have adopted a number of voluntary codes and other external instruments that we consider particularly relevant to our business, including Environmental Management System Standard ISO 14001, Occupational Health and Safety Management System Standard ISO 45001, the Voluntary Principles on Security and Human Rights and our commitment to follow the TSM program of the Mining Association of Canada at all of our operating locations.

HEALTH, SAFETY AND ENVIRONMENTAL POLICIES

Among our core values are protecting the health and welfare of our employees and contractors and reducing the impact of our operations on the environment. In 2020, both our Manitoba and Peru operations transitioned to the ISO 45001 health and safety management system standard, which has replaced the OHSAS 18001 standard. All of our producing operations currently have management systems certified to Safety and Environmental Management System Standards ISO 45001 and ISO 14001. In addition, the production and supply of our cast zinc products are registered to the ISO 9001 quality standard.

We believe that ongoing improvement in the safety of our workplace assists in maintaining healthy labour relations and that our ability to minimize recordable injuries (Medical Aid, Restricted Work and Lost Time injuries) and comply with environmental requirements are significant factors in maintaining social license to operate and realizing opportunities to improve overall operational efficiency. Our safety management systems also focus on identifying and mitigating fatal risks, including implementing critical controls addressing fatal risks and also on thoroughly investigating any incidents that represent a potential fatality regardless of the actual outcome of the incident. During 2018 and 2019, we transitioned to classifying injuries across our company using the International Council on Mining and Metals ("ICMM") criteria. Based on the ICMM criteria, in 2020, our recordable injury frequency per 200,000 hours worked was 1.26, essentially equaling our 2019 performance. Our other key measure of performance, Lost Time Severity, decreased in 2020 to 3.3 days lost per 200,000 hours worked from 4.1 in 2019 (we measure lost time and severity based on time away from work and do not include days of restricted work).

Our environmental management program consists of a corporate environmental policy, and at each site, comprehensive environmental management plans and procedures that are integrated with operating procedures, employee training, regular internal and external audits, and emergency response systems. Appropriate water stewardship plays an important role in the development and operation of our projects, particularly the Rosemont project. Hudbay's near term approach to greenhouse gas ("GHG") mitigation is to focus on the energy efficiency of our operations. Our direct GHG emissions are largely related to mobile equipment and we recognize that future fleet replacements will need to consider alternative energy sources. Our electricity is all supplied by third parties via regional grids, and is nearly all from renewable sources in Manitoba and partially from renewable sources in Peru. Our mitigation and adaptation approach is discussed further in our Annual and Sustainability Report. We did not have any material environmental non-compliances in 2020.

We maintain a company wide information system for recording, managing and tracking environmental, health, safety and community incidents.

HUMAN RIGHTS POLICY

Our Human Rights Policy articulates our commitments to human rights and addresses topics such as business and labour practices, community participation and security measures. Our Corporate Standards for Stakeholder Engagement, Community Giving and Investment, Local Procurement and Employment and Security Management provide our business units with additional corporate direction on minimum standards with respect to meeting the commitments we set out in our Human Rights Policy.

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The Voluntary Principles on Security and Human Rights provide important guidance for our security and community relations practices in locations with higher potential for social conflict and, in Peru, we regularly audit security policies and practices and conduct gap analyses against the Voluntary Principles.

SUSTAINABILITY REPORTING

Each year we publish a combined Annual and Sustainability Report that presents and discusses our environmental, social, health and safety performance in the context of our overall business performance. This report is prepared pursuant to the Global Reporting Initiative guidelines and the SASB Metals and Mining Standard, which are the world's most widely used sustainability reporting frameworks. Our 2019 Annual and Sustainability Report has been prepared largely in accordance with the "Core" option of the G4 guidelines and is available on our website at https://hudbayminerals.com/disclosure-centre/default.aspx. Our 2020 report is expected to be released in the second quarter of 2021.

RISK FACTORS

An investment in our securities is speculative and involves significant risks that should be carefully considered by investors and prospective investors. In addition to the risk factors described elsewhere in this AIF, the risk factors that impact us and our business include, but are not limited to, those set out below. The risks and uncertainties described below are not the only risks and uncertainties that we face. Additional risks and uncertainties not presently known to us or that we currently deem less material may also impair our business operations. Any one or more of these risks could have a material adverse effect on our business, results of operations, financial condition and the value of our securities.

METALS PRICES AND FOREIGN EXCHANGE

Our profit or loss and financial condition depend upon the market prices of the metals we produce, which are cyclical and which can fluctuate widely with demand. The profitability of our current operations is directly related and sensitive to changes in the market price of copper and zinc and, to a lesser extent, that of gold, silver and molybdenum (see "Sensitivity Analysis" on page 30 of our management's discussion and analysis for the year ended December 31, 2020). Market prices of metals can be affected by numerous factors beyond our control, including the overall state of the economy and expectations for economic growth (including as a result of the COVID-19 pandemic), general levels of supply and demand for a broad range of industrial products, substitution of new or different products in critical applications for existing products, level of industrial production, expectations with respect to the rate of inflation, foreign exchange rates and investment demand for commodities, interest rates and speculative activities. Such external economic factors are in turn influenced by changes in international investment patterns, monetary systems and political developments. The Chinese market is a significant source of global demand for commodities, including copper and zinc. Chinese demand has been a major driver in global commodities markets for a number of years. A slowing in China's economic growth could result in lower prices and demand for our products and negatively impact our results. We could also experience these negative effects if demand in China slowed for other reasons, such as market disruption due to the COVID-19 pandemic, trade disputes, increased self-sufficiency, increased reliance on other suppliers to meet demand or a prolonged market disruption event, including as a result of the recent COVID-19 pandemic. Prices are also affected by the overall supply of the metals we produce, which can be affected by the start-up of major new mines, production disruptions and closures of existing mines. Future price declines (including as a result of the COVID-19 pandemic) may, depending on hedging practices, materially reduce our profitability and could cause us to reduce output at our operations (including, possibly, closing one or more of our mines or plants). If such price declines were significant, there could be a material and adverse effect on our cash flow from operations and our ability to finance our projects and satisfy our debt service obligations (see "Access to Capital and Indebtedness" below).

In addition to adversely affecting the reserve estimates and the financial condition of the Company, declining metals prices can impact operations by requiring an assessment or reassessment of the feasibility of a particular project. If metals prices should decline below our cash costs of production and remain at such levels for any sustained period, we could determine that it is not economically feasible to continue production at any or all of our mines. We may also curtail or suspend some or all of our exploration and development activities, with the result that our depleted reserves are not replaced.

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In addition, since our core operations are located in Canada and Peru, many of our costs are incurred in Canadian dollars and Peruvian soles. However, our revenue is tied to market prices for copper, zinc and other metals we produce, which are typically denominated in United States dollars. If the Canadian dollar or Peruvian sol appreciate in value against the United States dollar, our results of operations and financial condition could be materially adversely affected. Although we may use hedging strategies to limit exposure to currency fluctuations, there can be no assurance that such hedging strategies will be successful or that they will mitigate the risk of such fluctuations.

PUBLIC HEALTH THREATS

An outbreak of infectious disease, a pandemic or a similar public health threat (such as the outbreak in 2020 of the novel coronavirus known as COVID-19), or a fear of any of the foregoing, could cause operating, supply chain and project development stoppages and delays and disruptions, labour shortages, reduced product demand, travel and shipping disruption and shutdowns (including as a result of government regulation and prevention measures). The possibility of a global recession arising from the pandemic and attempts to control it may impact metals demand and prices and could reduce available liquidity options. As a result, we may experience production below estimated levels, increased costs or significantly reduced revenue. This can lead to a material adverse effect on the financial performance, liquidity and results of operations.

In particular, as a result of the COVID-19 pandemic, we have experienced operational, supply chain, travel, labour and shipping disruptions, as well as delays in our community engagement efforts in Peru, and we may continue to experience similar disruptions in the future. As a result, to the extent COVID-19 continues to affect production, operating costs and the prices we receive for our products, as well as the development timeline for Pampacancha, our financial results may remain volatile. The resumption of normal operating activities is highly dependent on the global response and continuing impact of the COVID-19 pandemic and, at a local level, the expected development timeline for Pampacancha depends upon our ability to effectively engage and negotiate with individual land users as well as the communities that are affected by our Constancia project in Peru. Given the uncertainty with respect to the duration and magnitude of the impact of COVID-19 pandemic, including its impact on the development timeline for Pampacancha, our 2021 production and cost guidance are subject to a higher than normal degree of uncertainty.

On January 26, 2021, the Peruvian government announced heightened restrictions in order to help mitigate the spread of COVID-19. Under these new measures, all provinces of Peru are categorized as High, Very High, or Extreme, with corresponding levels of restrictions, including daily curfews and restrictions on domestic travel. Parts of Lima and Cusco, two regions where we operate, are currently classified as Extreme and Very High, respectively. On February 19, 2021, the Peruvian government extended the COVID-19 health emergency for another 180 days from March 7 to September 2, 2021, at which point the government is expected to re-evaluate the situation.

On January 28, 2021, in an effort to continue to reduce the COVID-19 cases in the province, the Manitoba government issued a public health order mandating a 14-day self-isolation period for anyone returning or coming to Manitoba from all jurisdictions. This order provides certain allowances for workers travelling to work and is not expected to impact Hudbay's ability to maintain required workforce levels. Our protocols of testing and pre-screening incoming workers continue to be in effect.

The possibility of a prolonged shutdown at some or all of our operations would cause us to continue to incur costs without realizing revenue and could delay our key development projects.

For the above reasons, we may experience production below estimated levels, increased costs, significantly reduced revenue and project delays. This could lead to a material adverse effect on our financial performance and condition, liquidity, access to capital and results of operations.

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DEVELOPMENT OF NEW PROJECTS

Our ability to successfully develop future growth projects is subject to many risks and uncertainties, including: the ability to generate sufficient free cash flows and secure adequate financing to fund the projects; obtaining and maintaining key permits and approvals from governmental authorities; successful resolution of administrative and legal challenges against permits that have been issued to us and those permits that may be issued in the future (particularly in the case of the Rosemont Project); obtaining surface rights agreements, if needed; construction, commissioning and ramp-up risks; scheduling and cost-overrun risks; developing and maintaining good relationships with neighbouring communities, local governments and other stakeholders; and political and social risk.

Significant amounts of capital will be required to construct and operate a new mine, such as Rosemont, and, to a lesser extent, to complete the New Britannia and Pampacancha projects. Our capital and operating costs may be affected by a variety of factors, including project scope changes, local currency appreciation and general cost escalation common to mining projects globally. Factors such as COVID-19 related inefficiencies, delays or deferrals, changes to technical specifications, failure to enter into agreements with contractors or suppliers in a timely manner, including contracts in respect of project infrastructure, and shortages of capital, may also delay or prevent the completion of construction or commencement of production or require the expenditure of additional funds. At New Britannia, for example, we expect total project spending to be approximately $13 million higher than budget due to project scope additions and COVID-19 related costs. Many major mining projects constructed in the last five to ten years have experienced cost overruns that substantially exceeded the capital cost estimated during the basic engineering phase of those projects, sometimes by as much as 50% or more. There can be no certainty that there will be sufficient financing or other transactions available on acceptable terms to fund the construction of Rosemont if we are successful in having the required permits reinstated.

The development of the Rosemont project may not occur as planned. While we expect that the Rosemont project will eventually be constructed and result in increased copper and precious metals production and enhanced growth opportunities for us, these anticipated benefits are not assured. There can be no assurance that administrative and legal challenges to Rosemont's permits (including those with respect to the FROD and Section 404 Water Permit) will be successfully resolved. Moreover, there may be further delays caused by additional administrative and legal challenges to Rosemont's permits.

The capital expenditures, timeline and other risks involved with developing a new mine, such as Rosemont, refurbishing and commissioning a new processing facility, such as the New Britannia mill, and mining a new deposit such as Pampacancha at our Constancia mine in Peru, are considerable. In the case of the New Britannia mill, the primary risk is the construction schedule and the constraints imposed on construction by COVID-19 related concerns and winter weather conditions in northern Manitoba. In the case of Pampacancha, there is a risk that we may not be able to use the surface rights we acquired from the community to develop the deposit if we are unable to reach agreements with those individual community members that currently use a portion of the acquired lands. Any inability to access the acquired surface rights for Pampacancha or take possession of other areas for which we hold surface rights could render us unable to carry out planned exploration, development and mining activities and expose us to financial risks. There can be no assurance that our current development projects or other projects we intend to develop will be able to be developed successfully or economically or that they will not be subject to the other risks described in this section.

DEPLETION OF RESERVES

Subject to any future expansion or other development, production from existing operations at our mines will typically decline over the life of the mine and, in the case of a maturing mine nearing the end of its life such as our 777 mine, the risk of the extraction of mineral reserves becoming uneconomic increases. As a result, our ability to maintain our current production or increase our annual production of base and precious metals and generate revenues therefrom will depend significantly upon our ability to discover or acquire new deposits, to successfully bring new mines into production and to expand mineral reserves at existing mines. Exploration and development of mineral properties involves significant financial risk. Very few properties that are explored are later developed into operating mines.

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Whether a mineral deposit will be commercially viable depends on a number of factors, including: the particular attributes of the deposit, such as size, grade and proximity to infrastructure; metal prices, which are highly cyclical; political and social stability; the cost of any required surface rights; obtaining and maintaining a social license to operate; and government regulation, including regulations relating to prices, taxes, royalties, land tenure, land use, importing and exporting of minerals and environmental protection, and the cost of any legal or administrative challenges related thereto. Even if we identify and acquire what we believe to be an economically viable ore body, several years may elapse from the initial stages of development.

During this time, we may incur significant expenses to locate and establish mineral reserves, to develop metallurgical processes and to construct mining and processing facilities. We cannot provide assurance that our exploration or development efforts will result in any new commercial mining operations or yield new mineral reserves to replace or expand current mineral reserves.

POLITICAL AND SOCIAL RISKS

A change in government, government policy, the declaration of a state of emergency or the implementation of new, or the modification of existing, laws and regulations affecting our operations and other mineral properties could have a material adverse impact on us and our projects. Such laws or events could involve restrictions on businesses, the expropriation of property, implementation of exchange controls and price controls, increases in production royalties and income and mining taxes, refusal to grant or renew required permits, licenses, leases or other approvals or requiring unfavourable amendments to or revoking current permits and licenses, and enacting environmental or other laws that would make contemplated operations uneconomic or impractical. The risk exists that further government limitations, restrictions or requirements, not presently foreseen, will be implemented. In addition, changes in policy that alter laws regulating the mining industry could have a material adverse effect on us. We are at a heightened risk of having this occur whenever there is a change in government in the countries or regions in which we operate and, in the current environment, due to the COVID-19 pandemic.

Although we only operate in jurisdictions that we believe support responsible mining in the Americas, there can be no assurance that our assets in these countries will not be subject to nationalization, requisition or confiscation, whether legitimate or not, by a government authority or other body.

In situations where we have acquired mineral rights, we may not be able to secure required surface rights. In addition, in situations where we possess surface rights, our land may be illegally occupied or access could otherwise be denied. Any inability to secure required surface rights or take possession of areas for which we hold surface rights could render us unable to carry out planned exploration, development and mining activities. We are at the highest risk of this occurring at our Constancia mine in Peru, where we need to reach agreements with certain individual community members that use a portion of the surface lands that we have acquired from the community in order to commence mining Pampacancha and need to enter into land use agreements with other communities in order to explore the prospective mineral properties we acquired in close proximity to Constancia. In addition, we possess certain other surface rights that could be illegally occupied or challenged by the surrounding communities.

Peru has recently undergone a period of heightened political instability. A general election is scheduled to be held on April 11, 2021 in which a record number of candidates are presently running for President. Political or social unrest or instability in Peru (which we continue to actively monitor during this period of elevated instability) could adversely affect our ability to operate the Constancia mine and develop the Pampacancha deposit. Such adverse effects could result in positions or actions that may be taken by the national government or at the regional, community or local levels by government or non-governmental actors, including demanding payments, encroaching on our land, challenging the boundaries of such land or our rights to possess and operate on such land, protesting against our operation (including the environmental or social impacts of our operation), impeding project activities through roadblocks or other public manifestations and attacking project assets or personnel. During the last several years, certain mining projects in Peru have been the target of political and community protests. While there have been some initiatives in respect of the Constancia mine, including attempts to restrict access and trespassing by workers and members of the surrounding communities, those initiatives have been limited and have not significantly disrupted the project's development or operations. There is the risk that more significant opposition may be mounted that may affect our ability to operate the Constancia mine. The risk of disruptions from such opposition tends to increase with national, regional and local elections in Peru as well as with change to the general political and social climate in the area in which we operate. While we continue to seek to constructively engage with all our stakeholders in the Constancia region, we have experienced an increase in disruptive activity in the Province of Chumbivilcas in recent weeks.

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COMMUNITY RELATIONS AND INDIGENOUS RIGHTS

Our relationships and reputation, particularly with the communities in which we operate in Manitoba, Chumbivilcas (Peru), Arizona and Nevada are critical to the future success of our existing operations and the construction and development of future projects. There is an increasing level of public attention and advocacy relating to the real and perceived effect of mining activities on the environment and on communities impacted by those activities. Publicity adverse to us, our operations, or extractive industries generally, including as a result of anti-mining protests or publications, could have an adverse effect on us and may impact our reputation and relationship with the communities in which we operate, including the communities surrounding our key projects and other stakeholders.

Although we have entered into life of mine agreements with the two local communities directly affected by the Constancia mine and the one local community directly affected by the development of the Pampacancha deposit, and have a number of agreements in place with other local communities and governments in the area, there can be no assurance that disputes will not arise with these local communities or governments or that other communities or governments in the region with whom we do not have an agreement in place will demand an impact benefit or community investment agreement. There is also a risk we will be unable to reach agreements with certain individual community members that use a portion of the Pampacancha surface lands that we have acquired from the community which would impair our ability to successfully develop the Pampacancha deposit. There is also a risk we may be unable to reach land use agreements with other local communities in order to explore the prospective mineral properties we own in close proximity to Constancia. Relations with local communities may be strained by real or perceived detrimental effects associated with our activities or those of other mining companies and those strains may impact our ability to enforce our existing community agreements or obtain necessary permits and approvals to operate the Constancia mine. Further, communities and other groups in Peru and elsewhere that self-identify as Indigenous people may assert rights to be consulted and a right to free, prior and informed consent over project decisions. In Peru, this requires compliance with the Consulta Previa law.

The process of reconciliation with Indigenous peoples in Canada, including the Government of Canada's intention to implement the United Nations Declaration on the Rights of Indigenous Peoples may result in new such regulations being introduced in Canada. Although we work to engage with and provide opportunities to Indigenous communities near our operations in Manitoba, asserted rights of Indigenous peoples may affect our ability to operate our Lalor mine and develop other mineral properties in Manitoba, including our plans for the Snow Lake region. In the past this has given rise to temporary disruptions of our operations at Lalor. There can be no assurance that other disruptions will not be initiated in the future, which initiatives may affect our ability to explore and develop our properties in the Snow Lake region and conduct our operations.

In addition, from time to time, our operations may be adversely affected by protests and social activism broadly related to Indigenous rights and the process of reconciliation in Canada. In early 2020, for example, protests related to the Coastal GasLink pipeline project shutdown CN railway lines across Canada and impaired Hudbay's ability to ship mineral products to its customers.

While we are committed to operating in accordance with applicable laws and in a socially responsible manner, there can be no assurance that our efforts in this respect will fully mitigate this potential risk.

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MINING, PROCESSING AND INSURANCE

Mining operations, including exploration, development and production of mineral deposits and disposal of tailings, generally involve a high degree of risk and are subject to conditions and events beyond our control. Our operations are subject to all of the hazards and risks normally encountered in the mining industry including: adverse environmental conditions; industrial and environmental accidents; metallurgical and other processing problems; unusual or unexpected rock formations; ground or slope failures; structural cave-ins or slides; flooding or fires; seismic activity; rock bursts; equipment failures; and periodic interruptions due to weather conditions, as well as intentional acts by individuals or groups who intend to harm or disrupt our operations. These risks could result in the destruction of mines or processing facilities, the failure of tailings management facilities and damage to infrastructure, causing partial or complete shutdowns, personal injury or death, environmental or other damage to our properties or the properties of others, monetary losses and potential legal liability. At our 777 mine for example, we experienced a six-week suspension of hoisting operations in the fourth quarter of 2020 due to an incident that occurred during routine maintenance of the hoist rope and skip, which is the bucket used to hoist ore from underground. Although we conduct extensive maintenance and monitoring and incur significant costs to maintain our mines, equipment and infrastructure, including our tailings management facilities, unanticipated failures or damage may occur that cause injuries, production loss or environmental pollution and resulting legal and economic liability, which may be significant. We may be at a heightened risk of such anticipated failures or damage in Manitoba, where some of our mines, equipment and infrastructure, including our tailings management facilities, were built over 80 years ago and, in the case of FFTIA, were based on the upstream construction design method.

As part of our risk management process for tailings, Hudbay has established an Independent Peer Review Board and developed a Tailings Governance Charter to oversee the governance and management of our tailings facilities (see "Tailings Management facilities"). This framework has resulted in a decision to implement a number of improvements to our Manitoba tailings facilities from 2020 to 2022 at a projected capital cost of approximately US$20 million per year. While these initiatives are intended to improve the safety factor of the Manitoba tailings facilities and bring them into line with best practices, there can be no assurance that these improvements will completely mitigate the risk of failure.

Failure to achieve production, cost or life-of-mine estimates could have an adverse impact on our future cash flows, profitability, results of operations and financial condition. Likewise, the failure to produce marketable mineral concentrates from our operations, or the presence of deleterious elements in our mineral concentrate products, may adversely impact our ability to generate revenues from our production. We are at an increased risk of this at our Constancia operations, where the presence of lead and zinc in certain parts of the ore body requires us to blend production in order to sell marketable copper concentrate. Our actual production, costs and the productive life of a mine may vary from estimates for a variety of reasons, including actual ore mined varying from estimates of grade, tonnage, dilution and metallurgical and other characteristics, short-term operating factors relating to the mineral reserves, such as the need for sequential development of ore bodies and the processing of new or different ore grades, revisions to mine plans, risks and hazards relating to mining and availability of and cost of labour and materials. As a mine matures and nears the end of its life, such as our 777 mine, the risks that may cause actual production to vary from previous estimates increases and the extraction of mineral reserves may become uneconomic.

Likewise, as processing facilities age, such as our Stall concentrator and the Flin Flon metallurgical complex, the risk of unexpected shutdowns and reduced availability increases. Any inability to provide adequate feed to our processing facilities or maintain the availability of our processing facilities could adversely impact our profitability and impair the viability of our operations.

Our insurance will not cover all the potential risks associated with our operations. In addition, although certain risks are insurable, no assurance can be given that such insurance will continue to be available or that we will be able to maintain insurance to cover these risks at economically feasible premiums. Insurance against risks such as non-sudden or non-accidental emissions pollution as a result of exploration and production is not generally available to us on acceptable terms. Business interruption due to pandemics such as COVID-19 is generally not covered by business interruption insurance. Losses from uninsured events may cause us to incur significant costs.

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RECLAMATION AND MINE CLOSURE COSTS

The ultimate timing of, and costs for, future removal and site restoration could differ from current estimates. Our estimates for this future liability are subject to change based on updated closure plans, amendments to applicable laws and legislation, the nature of ongoing operations and technological innovations. In addition, regulatory authorities in various jurisdictions require us to post financial assurances to secure, in whole or in part, future reclamation and restoration obligations in such jurisdictions based on the approved closure plans. Changes to the amounts required, as well as the nature of the collateral to be provided, including as a result of updated closure plans, could significantly increase our costs, making the maintenance and development of existing and new mines less economically feasible, and any capital resources we utilize for this purpose will reduce the resources available for our other operations and commitments. Although we accrue for future closure costs based on current disturbance, we do not necessarily reserve cash in respect of these obligations or otherwise fund these obligations in advance. As a result, we will have significant cash expenditures when we are required to close and restore mine sites, including our 777 mine and Flin Flon operations. Our estimate of this future liability may increase as a result of a new closure plan for the 777 mine and Flin Flon operations.

RECRUITMENT, RETENTION AND LABOUR RELATIONS

The success of our operations and development projects depend in part on our ability to attract and retain geologists, engineers, metallurgists and other personnel with specialized skill and knowledge about the mining industry in the geographic areas in which we operate. The success of our operations in Snow Lake, Manitoba and southern Peru, in particular, depend in part on our ability to attract new skilled personnel to work for us in these geographic areas.

We also are dependent on a number of key management and operating personnel, and our success will depend in large part on the efforts of these individuals and our ability to retain them.

There can be no assurance that our business will not suffer from a work stoppage at any location where we operate. There is a heightened risk of a work stoppage in 2021 in connection with the renegotiation of collective bargaining agreements with our unionized workforces in Manitoba and Peru. The collective bargaining agreements with the labour union in Peru and the six labour unions at our Manitoba operations expired on or about December 31, 2020 and there is a risk that one or more of the labour unions could strike if we are unable to reach a new agreement.

In addition, from time to time we may temporarily suspend or close certain of our operations and we may incur significant labour and severance costs as a result of a suspension or closure. Further, temporary suspensions and closures may adversely affect our future access to skilled labour, as employees who are laid off may seek employment elsewhere.

LIQUIDITY, ACCESS TO CAPITAL AND INDEBTEDNESS

As at December 31, 2020, we had cash and cash equivalents of $439.1 million as well as $284.9 million in undrawn availability under our Credit Facilities. While we expect that our current liquidity and future cashflows will be sufficient to meet our obligations in the coming year, there can be no assurances that this will be the case given a potential deterioration in metals prices and other risks associated with the COVID-19 pandemic.

To fund growth, secure our future reclamation obligations and, in difficult economic times, to ensure continued operations, we may need to secure necessary capital through loans or other forms of permanent capital. The availability of this capital is subject to general economic conditions and lender and investor interest in the Company and our projects and, in the case of the Credit Facilities, the financial maintenance covenants contained therein. Financing may not be available when needed or, if available, may not be available on terms acceptable to us. Failure to obtain or maintain any financing necessary for our capital expenditure plans may result in a delay or indefinite postponement of exploration, development or production on any or all of our properties, including our potential plans to develop future growth projects.

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We have a significant amount of indebtedness. After our recent bond refinancings, we have total long-term debt of approximately $1.2 billion. As a result, we have a substantial annual interest expense, including approximately $64 million in respect of our Senior Unsecured Notes.

Specifically, our substantial level of indebtedness could have important consequences, including:

•limiting our ability to access capital to fund future working capital, capital expenditures, acquisitions or other general corporate requirements;

•requiring a substantial portion of our cash flows to be dedicated to debt service payments instead of other purposes, thereby reducing the amount of cash flows available for working capital, capital expenditures, acquisitions and other general corporate purposes;

•increasing our vulnerability to general adverse economic and industry conditions;

•exposing the Company to the risk of increased interest rates as certain of our borrowings are at variable rates of interest;

•limiting our flexibility in planning for and reacting to changes in the industry in which we compete;

•placing the Company at a disadvantage compared to other less leveraged competitors; and

•increasing our cost of borrowing.

Subject to the limits contained in the indentures governing the Senior Unsecured Notes and any limits under our other debt instruments existing from time to time, we may incur additional debt (including under our Facilities) to finance working capital, capital expenditures, investments or acquisitions or for other purposes. If we do so, the risks related to our level of indebtedness could intensify.

Our ability to make scheduled payments on, repay in full or refinance our debt obligations, including the Senior Unsecured Notes, depends on our financial condition and operating performance, which are subject to prevailing economic and competitive conditions and to certain financial, business, legislative, regulatory and other factors beyond our control, most importantly, metals prices. We may be unable to maintain a level of cash flows from operating activities sufficient to permit us to pay the principal, premium, if any, and interest on our indebtedness, including the Senior Unsecured Notes.

If our cash flows and capital resources are insufficient to fund our debt service obligations, we could face substantial liquidity problems and could be forced to reduce or delay investments and capital expenditures or to dispose of material assets or operations, seek additional debt or equity capital or restructure or refinance our indebtedness, including the Senior Unsecured Notes. We may not be able to effect any such alternative measures on commercially reasonable terms or at all and, even if successful, those alternatives may not allow us to meet our scheduled debt service obligations. The indentures governing the Senior Unsecured Notes restrict our ability to dispose of assets and use the proceeds from those dispositions and may also restrict our ability to raise debt or equity capital to be used to repay other indebtedness when it becomes due. We may not be able to consummate those dispositions or to obtain proceeds in an amount sufficient to meet any debt service obligations then due.

In addition, the indentures governing the Senior Unsecured Notes contain a number of restrictive covenants that impose significant operating and financial restrictions on us and may limit our ability to engage in acts that may be in our long-term best interest, including restrictions on our ability to:

•incur additional indebtedness;

•pay dividends or make other distributions or repurchase or redeem capital stock;

•prepay, redeem or repurchase certain debt;

•make loans and investments;

•sell assets;

•incur liens;

•enter into transactions with affiliates;

•alter the businesses we conduct;

•enter into agreements restricting our subsidiaries' ability to pay dividends; and

•consolidate, amalgamate, merge or sell all or substantially all of our assets.

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If we cannot make scheduled payments on our debt, or we breach any of the covenants under the indentures governing the Senior Unsecured Notes or our other debt instruments, we will be in default and holders of our debt could declare all outstanding principal and interest to be due and payable, causing a cross-acceleration or cross-default under certain of our other debt agreements (including our secured facilities) and our other creditors could foreclose against the collateral securing our obligations and we could be forced into bankruptcy or liquidation.

GOVERNMENTAL APPROVALS, PERMITTING AND ENVIRONMENTAL REGULATION

Our activities are subject to various laws and regulations governing prospecting, development, production, taxes, labour standards, occupational health, mine safety, toxic substances, protection of the environment and other matters. Government approvals and permits are currently required in connection with all of our operations, and further approvals and permits will be required in the future. The success of our efforts to obtain and maintain permits is contingent upon many variables outside of our control, including the public consultation process undertaken by regulatory agencies. Obtaining and complying with governmental permits may increase costs and cause delays. There can be no assurance that all necessary permits will be obtained and, if obtained, that the time and costs involved will not exceed our estimates or that we will be able to maintain such permits as a result of, among other things, conditions imposed or legal challenges. To the extent such approvals are required and not obtained or maintained, our operations may be curtailed or we may be prohibited from proceeding with planned exploration, development, or operation of mineral properties.

Environmental regulation continues to evolve in a manner that requires stricter standards and enforcement, increased fines and penalties for non-compliance, and more stringent environmental assessments of proposed projects. There can be no assurance that existing or future environmental regulation will not materially adversely affect our business, financial condition and results of operations. There is contamination on properties that we own or owned or for which we have or have had care, management or control and, in some cases on neighbouring properties, that may result in remediation requirements, fines and personal injury or natural resource damage claims, which could result in material costs. We could be held responsible for investigative-cleanup cost relating to presently unknown contamination on our properties. We may also acquire properties with environmental risks. Any investigative and remediation costs for known or unknown contamination, or for future releases of hazardous or toxic substances at our properties or related to our activities, could be material.

Although we believe that our operations are currently carried out in material compliance with applicable laws and regulations, no assurance can be given that new laws and regulations will not be enacted or that existing laws and regulations will not be amended or applied in a manner that could have a material adverse effect on our business, financial condition and results of operations, including laws governing our tailings storage facilities. Any failure to comply with such laws and regulations may result in enforcement actions, including orders issued by regulatory or judicial authorities causing operations to cease or be curtailed, and may include corrective measures requiring capital expenditures, installation of additional equipment, or remedial actions. We may be required to compensate those suffering loss or damage relating to mining activities, and we may have civil or criminal fines or penalties imposed for violations of applicable laws or regulations, which costs could be material.

TRANSPORTATION AND INFRASTRUCTURE

At our mines in northern Manitoba and Saskatchewan, we are dependent upon a single railway and certain short-line rail networks to transport products from the Flin Flon metallurgical complex for further processing or to our customers. In addition, from time to time we haul a portion of the ore production from the Lalor mine approximately 200 kilometers by road to Flin Flon for processing. In Peru, concentrate production from the Constancia mine must travel approximately 450 kilometers by road to the Port of Matarani. The method and route of transportation of ore and concentrates to our processing facilities and for sale give rise to a number of risks, including road safety and community and environmental risks. We may have similar dependencies at future mining and processing operations. Inability to secure reliable and cost-effective transportation and other infrastructure, or disruption of these services due to community or political protests (as was the case in 2020 with the CN rail blockades in Canada and community protests in Peru), weather-related problems, strikes, lock-outs or other events could have a material adverse effect on our operations. If transportation for our products is or becomes unavailable, our ability to market our products could suffer. In addition, increases in our transportation costs, relative to those of our competitors, could make our operations less competitive and could adversely affect our profitability.

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TITLE TO MINERAL PROPERTIES

Although we believe we have taken reasonable measures to ensure valid title to our properties, there can be no assurance that title to any of our properties will not be challenged or impaired. Third parties may have valid claims underlying portions of our interests, including prior unregistered liens, agreements, transfers or claims, and aboriginal land claims, and title may be affected by, among other things, undetected defects or unforeseen changes to the boundaries of our properties by governmental authorities.

In addition, a portion of the Rosemont property and certain other of our mining properties in the United States are located on unpatented mine and millsite claims located on U.S. federal public lands. The right to use such claims is granted under the United States General Mining Law of 1872. Unpatented mining claims are unique property interests in the United States, and are generally considered to be subject to greater title risk than other real property interests because the validity of unpatented mining claims is often uncertain. While we believe there are no material defects in title of the Rosemont project lands, this is one of the issues that is in dispute and currently the subject of ongoing litigation. As a result, there can be no assurance that all of our unpatented mine and millsite claims (including those forming part of the Rosemont project) will remain valid and available for development.

ANTI-BRIBERY LEGISLATION

We are subject to the U.S. Foreign Corrupt Practices Act ("FCPA"), which prohibits corporations and individuals from paying, offering to pay, or authorizing the payment of anything of value to any foreign government official, government staff member, political party, or political candidate in an attempt to obtain or retain business or to otherwise influence a person working in an official capacity. The FCPA also requires public companies to make and keep books and records that accurately and fairly reflect their transactions and to devise and maintain an adequate system of internal accounting controls. We are also subject to Canada's Corruption of Foreign Public Officials Act ("CFPOA"), which prohibits corporations and individuals from giving or offering to give a benefit of any kind to a foreign public official, or any other person for the benefit of the foreign public official, where the ultimate purpose is to obtain or retain a business advantage. Our Peru-based operations are also subject to local anti-bribery and anti-corruption laws including without limitation Law No. 30424, which imposes criminal liability for local and foreign bribery, money laundering, terrorism financing and related crimes, and Legislative Decree No. 1385 which sanctions private corruption.

Our international activities, including our Constancia mine and exploration activities elsewhere in South America, create the risk of unauthorized payments or offers of payments by our employees, consultants or agents to foreign persons. While we have implemented safeguards that are intended to prevent these practices, our existing safeguards and any future improvements to such safeguards may not be completely effective, and our employees, consultants or agents may engage in conduct for which we might be held responsible. Any failure to comply with the FCPA, the CFPOA and applicable laws and regulations in Peru and other foreign jurisdictions could result in substantial penalties or restrictions on our ability to conduct business in certain foreign jurisdictions, which may have a material adverse impact on us and our share price.

MINERAL RESOURCE AND RESERVE ESTIMATES

There are numerous uncertainties inherent in estimating mineral reserves and mineral resources and the future cash flows that might be derived from their production. Estimates of mineral reserves and mineral resources, and future cash flows necessarily depend upon a number of variable factors and assumptions, including, among other things, ability to achieve anticipated tonnages and grade, geological and mining conditions that may not be fully identified by available exploration data or that may differ from experience in current operations, historical production from the area compared with production from other producing areas, the assumed effects of regulation by governmental agencies and assumptions concerning metals prices, exchange rates, interest rates, inflation, operating costs, development and maintenance costs, reclamation costs, and the availability and cost of labour, equipment, raw materials and other services required to mine and refine the ore. In addition, there can be no assurance that mineral resources will be converted into mineral reserves and that mineral recoveries in small scale laboratory tests will be duplicated in larger scale tests under on-site conditions or during production. This is heightened in the case of Lalor, which has substantial inferred mineral resources. For these reasons, estimates of our mineral reserves and mineral resources in our public disclosure, and any estimates of future cash flows may vary substantially from our actual results.

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INFORMATION TECHNOLOGY SYSTEMS

Our operations depend, in part, on information technology ("IT") systems. Our IT systems are subject to disruption, failure or damage from a number of threats, including, but not limited to, security breaches, computer viruses, cable cuts, natural disasters, terrorism, power loss, vandalism, phishing, fraud and theft. Although to date we have not experienced any material losses relating to IT system disruptions, failure or damage, cyber attacks or other information security breaches, there can be no assurance that we will not incur such losses in the future. Any of these and other events could result in IT system failures, operational delays, production downtimes, security breaches, destruction or corruption of data or other improper use of our IT systems and networks, any of which could have an adverse effect on our reputation, results of operations, financial reporting and financial condition. Our exposure to this risk cannot be fully mitigated because of, among other things, the evolving nature of these threats. As such threats continue to evolve, we may be required to expend additional resources to continue to change or improve protective measures and to investigate and remediate any security vulnerabilities.

ENERGY AND OTHER CONSUMABLE PRICES AND AVAILABILITY

Our mining operations and facilities are intensive users of energy, diesel and other consumables (such as steel and metallurgical reagents) that are essential to our business. The prices of energy and other consumables, and in some cases their availability, can be affected by numerous factors beyond our control, including global and regional supply and demand, political and economic conditions, and applicable regulatory regimes. The prices of various sources of energy we rely on may increase significantly from current levels and any carbon-based energy we use may become subject to a carbon tax; any such significant increase or punitive tax could have an adverse effect on our profitability.

CLIMATE CHANGE

Governments and regulatory bodies at the international, national, regional and local levels have introduced or may introduce legislatives changes to respond to the potential impacts of climate change and it appears there is an increased commitment by the Canadian federal government to do so. Additional government action to regulate (and price) climate change, including regulations on carbon emissions and energy and water use to achieve net-zero emissions by 2050, could increase the direct and indirect costs of our operations and may have a material adverse effect on our business. Potentially, additional rules or regulations in the United States at the state or federal level will be forthcoming with respect to greenhouse gas emissions (including, but not limited to, carbon dioxide) and/or "cap and trade" legislation that could impact our operations.

In addition, there is increased investor attention on climate change, sustainability and environmental, social and governance ("ESG") issues more generally. Notwithstanding our commitment to conducting our business in a socially responsible manner, to the extent mining companies fall out of favour with some investors due to the industry's real or perceived impacts on climate change and its perceived role in a transition to a low carbon economy, this could negatively affect our shareholder base and access to capital.

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In addition, our operations are subject to the physical risks of climate change, which may include:

• Increased extreme weather events: Our current operations are located in geographical areas where typical weather can be hazardous. Constancia is situated in an area susceptible to seismic activity and El Niño and La Niña weather systems, the Rosemont project is vulnerable to extreme dry heat and the Manitoba operations are predisposed to cold temperatures, heavy snowfall and the inherent risks associated with sudden and drastic changes in temperature. An increase in extreme weather events at our operations, including increased frequency and severity of storms, winds and changes in precipitation and temperatures, could result in unanticipated challenges and may adversely affect our operations.

• Rising sea levels: A change in sea level can disrupt supply shipping channels, impacting both the transportation of equipment and resources to our operations and the delivery of our products to smelters and other purchasers.

• Water availability: Climate change may adversely affect the availability of water in arid locations, including the Southwestern United States (where our Rosemont and Mason projects are located) and Chile (where we have an active exploration program). Water scarcity and shortage can lead to pressure and government action to reduce industrial water consumption which may restrict the use of existing water rights.

Despite efforts to anticipate and mitigate against the hazards and risks of climate change, the above risks and other factors may impact production forecasts, results of operations, financial condition, corporate strategy and share price.

COMPETITION

The mining industry is intensely competitive and we compete with many companies possessing greater financial and technical resources than us. Since mines have a limited life, we must compete with others who seek mineral reserves for attractive, high quality mining assets. In addition, we also compete for the technical expertise to find, develop, and operate such properties, the labour to operate the properties and the capital for the purpose of funding such properties. Existing or future competition in the mining industry could materially adversely affect our prospects for mineral exploration and success in the future.

REPUTATIONAL RISK

As a result of the increased usage and reach of social media and other internet platforms used to create and publish user-generated content, companies today are at much greater risk of losing control over how they are perceived in the marketplace. Publicity adverse to us, including as a result of such user-generated content, could result from the actual or perceived occurrence of any number of events (for example, with respect to the handling of environmental matters, community relations or litigation), whether true or not. Although Hudbay seeks to mitigate this risk through a number of measures, there can be no assurance that the Company's reputation will not be harmed. Reputation loss may lead to increased challenges in developing and maintaining community relations and decreased investor confidence and could ultimately have a material adverse impact on Hudbay.

POST-RETIREMENT OBLIGATIONS

We have assets in defined benefit pension plans which accumulate through employer contributions and returns on investments made by the plans. The returns on investments are subject to fluctuations depending upon market conditions and we are responsible for funding any shortfall of pension assets compared to our pension obligations under these plans. Our liabilities under defined benefit pension plans are estimated based on actuarial and other assumptions. These assumptions may prove to be incorrect and may change over time and the effect of these changes can be material. We also have substantial commitments for post-retirement health and other benefits for which no specific funding arrangements are in place.

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CREDIT RISK

We mitigate credit risk relating to customers of our copper, zinc and precious metals by carrying out credit evaluations on our customers, making a significant portion of sales on a cash basis and maintaining insurance on select trade receivables. If customers default on the credit extended to them and our loss is not covered by insurance, results of operations could be materially adversely affected. Further, we may enter into offsetting derivative contracts for which we do not obtain collateral or other security. In the event of non-performance by counterparties in connection with such derivative contracts, we are further exposed to credit risk.

DIVIDEND PAYMENTS

The Senior Unsecured Notes impose certain restrictions on our ability to make restricted payments, including common dividends. Our ability to make future dividend payments will be subject to compliance with the covenants contained in our debt agreements along with other liquidity considerations. At all times, the declaration of dividends is subject to the discretion of our Board of Directors and our Board of Directors may determine to cease our past practice of making dividend payments at any time.

MARKET PRICE OF COMMON SHARES

Our share price may be significantly affected by changes in commodity prices or in our financial condition or results of operations. Other factors unrelated to our performance that may have an effect on the price of our common shares include a lessening in trading volume, shareholder activism and general market interest in our securities and the size of our public float. As a result of any of these factors, the market price of our common shares may fall and otherwise may not accurately reflect our long-term value. Securities class action litigation has been brought against companies following periods of volatility in the market price of their securities (including in the context of shareholder activism campaigns) and issuers listed on U.S. stock exchanges (as we are), in particular, have been subject to increasing shareholder litigation. We may in the future be the target of similar litigation.

GROWTH STRATEGY AND ACQUISITION INTEGRATION

We evaluate growth opportunities and continue to consider the acquisition and disposition of exploration, development and operating properties and other mineral assets to achieve our strategy. We, from time to time, engage in discussions in respect of both acquisitions and dispositions, and other business opportunities, but there can be no assurance that any such discussions will result in a successfully completed transaction. In addition, in the event of any such acquisition, there can be no assurance that the acquired business will be successfully integrated into our current operations.

FLUCTUATIONS IN THE VALUE OF EQUITY INVESTMENTS

We are exposed to market risk from the share prices of our equity investments in listed junior exploration companies. These investments are made to foster strategic relationships, in connection with joint venture agreements and for investment purposes. The share prices of these equity investments may be significantly affected by short-term changes in capital markets, commodity prices or in their financial condition or results of their operations, and as a result, will affect the value of our investments.

"PASSIVE FOREIGN INVESTMENT COMPANY" UNDER THE U.S. INTERNAL REVENUE CODE

We do not believe we are a "passive foreign investment company" under Section 1297(a) of the U.S. Internal Revenue Code ("PFIC") for the current taxable year. If we derive 75% or more of our gross income from certain types of ''passive'' income (such as rents, royalties, interest, dividends, and other similar types of income), or if the quarterly average value during a taxable year of our ''passive assets'' (generally, assets that generate passive income) is 50% or more of the average value of all assets held by us, then the PFIC rules may apply to U.S. taxpayers that hold our common shares (regardless of the extent of their ownership interest in us). Several ''look-through'' rules apply in determining PFIC status, including that a 25% or more owned subsidiary corporation's income and assets will be deemed those of its parent for purposes of the PFIC rules. Thus, a sufficiently active subsidiary may allow a parent corporation to avoid PFIC status, depending on the circumstances. Whether we are considered a PFIC for a specific taxable year is a factual determination that must be made annually at the end of that taxable year. As a result, our status in the current and future years will depend on the composition our gross income, our assets and activities in those years and our market capitalization as determined on the end of each calendar quarter, and there can be no assurance that we will or will not be considered a PFIC for any taxable year.

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If we are classified as a PFIC during any portion of a U.S. taxpayer's holding period for our common shares, as determined for U.S. federal income tax purposes, such taxpayer would be subject to adverse U.S. federal income tax consequences under the PFIC rules. In such case (except as discussed below), any excess distribution (generally a distribution in excess of 125% of the average distribution over a three- year period or shorter holding period for our common shares) and realized gain on the sale, exchange or other disposition of our common shares will be treated as ordinary income and generally will be subject to tax as if (a) the excess distribution or gain had been realized rateably over the U.S. taxpayer's holding period, (b) the amount deemed realized in each year had been subject to tax in each such year at the highest marginal rate for such year (other than income allocated to the current period or any taxable period before we became a PFIC, which would generally be subject to tax at the U.S. taxpayer's regular ordinary income rate for the current year and would not be subject to the interest charge discussed in (c) below), and (c) the interest charge generally applicable to underpayments of tax had been imposed on the taxes deemed to have been payable in those years. Where a company that is a PFIC meets certain reporting requirements, a U.S. taxpayer may be able to mitigate certain adverse PFIC consequences described above by making a "qualified electing fund" ("QEF") election to be taxed currently on its proportionate share of the PFIC's ordinary income and net capital gains. If we determine that we are a PFIC for any taxable year, we will determine at that time whether we will comply with the necessary accounting and record keeping requirements that would allow a U.S. taxpayer to make a QEF election with respect to us. We have no obligation to determine whether we are a PFIC and may not make any such determination.

DESCRIPTION OF CAPITAL STRUCTURE

COMMON SHARES

We are authorized to issue an unlimited number of common shares, of which there were 261,420,227 common shares issued and outstanding as of March 26, 2021.

Holders of common shares are entitled to receive notice of any meetings of our shareholders, to attend and to cast one vote per common share at all such meetings. Holders of common shares do not have cumulative voting rights with respect to the election of directors and, accordingly, holders of a majority of the common shares entitled to vote in any election of directors may elect all directors standing for election. Holders of common shares are entitled to receive, on a pro-rata basis, such dividends, if any, as and when declared by our board of directors at its discretion from funds legally available therefor. Upon our liquidation, dissolution or winding up, holders of common shares are entitled to receive, on a pro-rata basis, our net assets after payment of debts and other liabilities, in each case, subject to the rights, privileges, restrictions and conditions attaching to any other series or class of shares ranking senior in priority to or on a pro-rata basis with the holders of common shares with respect to dividends or liquidation. The common shares do not carry any pre-emptive, subscription, redemption or conversion rights, nor do they contain any sinking or purchase fund provisions.

PREFERENCE SHARES

We are authorized to issue an unlimited number of preference shares, none of which were issued and outstanding as of the date of this AIF. Preference shares may from time to time be issued and the Board of Directors may fix the designation, rights, privileges, restrictions and conditions attaching to any series of preference shares. Preference shares shall be entitled to preference over the common shares and over any other of our shares ranking junior to the preference shares with respect to the payment of dividends and the distribution of assets or return of capital in the event of our liquidation, dissolution or winding up or any other return of capital or distribution of our assets among our shareholders for the purpose of winding up our affairs. Preference shares may be convertible into common shares at such rate and upon such basis as the Board of Directors in their discretion may determine. No holder of preference shares will be entitled to receive notice of, attend, be represented at or vote at any annual or special meeting, unless the meeting is convened to consider our winding up, amalgamation or the sale of all or substantially all of our assets, in which case each holder of preference shares will be entitled to one vote in respect of each preference share held. Holders of preference shares will not be entitled to vote or have rights of dissent in respect of any resolution to, among other things, amend our articles to increase or decrease the maximum number of authorized preference shares, increase or decrease the maximum number of any class of shares having rights or privileges equal or superior to the preference shares, exchange, reclassify or cancel preference shares, or create a new class of shares equal to or superior to the preference shares.

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SENIOR UNSECURED NOTES

On September 23, 2020, we issued $600 million aggregate principal amount of 6.125% senior unsecured notes due 2029 (the "2029 Notes"). The proceeds of this offering were used to redeem $400 million of our outstanding 7.250% senior unsecured notes due 2023 (the "2023 Redeemed Notes") and to pay any related premium, costs, and expenses for general corporate purposes. The 2029 Notes have extended maturity dates, significantly reduced interest costs and a more flexible covenant structure as compared to the 2023 Redeemed Notes.

On March 8, 2021 we issued $600 million aggregate principal amount of 4.50% senior unsecured notes due 2026 (the "2026 Notes"). The proceeds of this offering were used to redeem $600 million of our outstanding 7.625% senior unsecured notes due 2025 (the "2025 Redeemed Notes"). The 2026 Notes have extended maturity dates, significantly reduced interest costs and a more flexible covenant structure as compared to the 2025 Redeemed Notes.

The 2026 Notes and the 2029 Notes (together, the "Senior Unsecured Notes") are fully and unconditionally guaranteed, jointly and severally, on a senior unsecured basis, by substantially all of our existing and future subsidiaries other than our subsidiaries associated with the Rosemont and Mason projects and certain newly formed or acquired subsidiaries that primarily hold or may develop non-producing mineral assets that are in the pre-construction phase of development. The Senior Unsecured Notes contain certain customary covenants and restrictions for a financing instrument of this type. Although there are no maintenance covenants with respect to our financial performance, there are transaction-based restrictive covenants that limit our ability to incur additional indebtedness and make restricted payments in certain circumstances.

On or after April 1, 2023 (in the case of the 2026 Notes), or April 1, 2024 (in the case of the 2029 Notes) we may redeem the Senior Unsecured Notes, at our option in whole or in part, at the redemption prices (expressed as percentages of the principal amount of such series of the Senior Unsecured Notes to be redeemed) set forth below, plus accrued and unpaid interest to the applicable date of redemption, if redeemed during the twelve-month period beginning on April 1 of each of the years indicated below:

2026 Notes		2029 Notes
Year	Percentage	Year	Percentage
2023	102.250%	2024	103.063%
2024	101.125%	2025	102.042%
2025 and thereafter	100.000%	2026	101.021%
		2027 and thereafter	100.000%

CREDIT RATINGS

The following table sets out the credit ratings we received from Standard and Poor's Ratings Services ("S&P") and Moody's Investors Services ("Moody's") on February 22, 2021 in connection with the issuance of the 2026 Notes, and Fitch Ratings ("Fitch") on March 19, 2021.

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	Credit Rating Organization
	S&P	Moody's	Fitch
Corporate Credit Rating	B	B2	B+
Senior Unsecured Notes	B	B3	B+

S&P

On January 26, 2021, S&P affirmed its issuer credit and issue-level ratings of 'B' for Hudbay, affirmed its '3' recovery rating and revised its outlook to stable from negative as a result of their expectation that Hudbay will generate materially higher earnings and cashflow and improved leverage ratios as a consequence of a stronger base metals price environment. On February 22, 2021, coincident with Hudbay's announcement of the refinancing of its 2025 notes, S&P reaffirmed its ratings and outlook for Hudbay and its 2026 and 2029 notes.

S&P's corporate credit rating (or issuer rating) is a forward-looking opinion about an obligor's overall creditworthiness in order to pay its financial obligations. This opinion focuses on the obligor's capacity and willingness to meet its financial commitments as they come due. It does not apply to any specific financial obligation.

S&P's corporate credit ratings are on a rating scale that ranges from AAA (highest quality) to D (lowest quality). The ratings from 'AA' to 'CCC' may be modified by the addition of a plus (+) or minus (-) sign to show relative standing within the major rating categories. According to S&P's rating system, an issuer rated 'B' currently has the capacity to meet its financial commitments, but adverse business, financial, or economic conditions will likely impair the obligor's capacity or willingness to meet its financial commitments. A 'B' rating is the sixth highest of ten categories in S&P's rating system.

Regarding the issue-level rating, according to S&P's rating system, S&P's issue credit ratings are based, in varying degrees, on its analysis of the following considerations: (i) likelihood of payment; (ii) nature of and provisions of the financial obligation; and (iii) protection afforded by, and relative position of, the obligation in the event of bankruptcy or reorganization. S&P's issue-level ratings are similarly on a rating scale that ranges from AAA (highest quality) to D (lowest quality), with the ratings from 'AA' to 'CCC' having plus (+) or minus (-) modifiers. According to S&P's rating system, an issue rated 'B' indicates that the obligor has the capacity to meet its financial commitments on the obligation, but adverse business, financial, or economic conditions will likely impair the obligor's capacity or willingness to meet its financial commitments on the obligation. A 'B' rating is the sixth highest of ten categories in S&P's rating system.

S&P's recovery ratings focus solely on expected recovery in the event of a payment default of a specific issue, and utilize a numerical scale that runs from 1+ to 6. The recovery rating is not linked to, or limited by, the corporate credit rating or any other rating, and provides a specific opinion about the expected recovery. A '3' recovery rating indicates S&P's expectations of meaningful (50%-70%) recovery in the event of default.

Moody's

On February 22, 2021 Moody's reaffirmed our corporate family rating of 'B2', our speculative grade liquidity rating of 'SGL-2', our probability of default rating of 'B2-PD' and our Stable outlook. It also reaffirmed our 'B3' rating for our Senior Unsecured Notes, being the 2029 Notes issued in September 2020 and the 2026 Notes which were offered on that date.

Moody's issuer and issue-level credit ratings are on a rating scale that ranges from Aaa (highest quality) to C (lowest quality). Moody's appends numerical modifiers 1, 2, and 3 to each generic rating classification from Aa through Caa. The modifier 1 indicates that the obligation ranks on the higher end of its generic rating category; the modifier 2 indicates a mid-range ranking; and the modifier 3 indicates a ranking in the lower end of that generic rating category. According to Moody's credit rating system, obligations rated 'B' are considered speculative and are subject to higher credit risk. A 'B' rating is the sixth highest of nine categories in Moody's rating system.

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Moody's speculative grade liquidity ratings are on a rating scale that ranges from SGL-1(best liquidity) to SGL-4 (weakest liquidity). According to Moody's speculative grade liquidity rating system, an issuer with an SGL-2' rating possesses good liquidity and is likely to meet its obligations over the coming 12 months through internal resources but may rely on external sources of committed financing. According to the system, the issuer's ability to access committed sources of financing is highly likely based on Moody's evaluation of near-term covenant compliance.

Moody's corporate family ratings are long-term ratings that reflect the likelihood of a default on a corporate family's contractually promised payments and the expected financial loss suffered in the event of default. A corporate family rating is assigned to a corporate family as if it had a single class of debt and a single consolidated legal entity structure.

A probability of default rating is a corporate family-level opinion of the relative likelihood that any entity within a corporate family will default on one or more of its long-term debt obligations.

Moody's long-term ratings are assigned to issuers or obligations with an original maturity of one year or more and reflect both on the likelihood of a default on contractually promised payments and the expected financial loss suffered in the event of default.

Moody's speculative grade liquidity ratings are opinions of an issuer's relative ability to generate cash from internal resources and the availability of external sources of committed financing, in relation to its cash obligations over the coming 12 months.

Fitch

On March 19, 2021, Fitch Ratings reaffirmed Hudbay's Long-Term Issuer Default Rating of 'B+' and revised our outlook to Positive from Stable. Fitch also reaffirmed our 'B+'/'RR4' rating for our Senior Unsecured Notes, being the 2029 Notes issued in September 2020 and the 2026 Notes issued in March 2021.

Fitch's credit ratings relating to issuers are an opinion on the relative ability of an entity to meet financial commitments, such as interest, preferred dividends, repayment of principal, insurance claims or counterparty obligations. Credit ratings relating to securities and obligations of an issuer can include a recovery expectation. Credit ratings are used by investors as indications of the likelihood of receiving the money owed to them in accordance with the terms on which they invested.

Fitch defines "investment grade" and "speculative grade" as shorthand to describe the categories 'AAA' to 'BBB' (investment grade) and 'BB' to 'D' (speculative grade), respectively, in-line with general industry practice. Investment grade categories indicate relatively low to moderate credit risk, while ratings in the speculative categories either signal a higher level of credit risk or that a default has already occurred. Credit ratings express risk in relative rank order, which is to say they are ordinal measures of credit risk and are not predictive of a specific frequency of default or loss.

Fitch's credit ratings do not directly address any risk other than credit risk. In particular, ratings do not deal with the risk of a market value loss on a rated security due to changes in interest rates, liquidity and other market considerations. However, in terms of payment obligation on the rated liability, market risk may be considered to the extent that it influences the ability of an issuer to pay upon a commitment. Ratings nonetheless do not reflect market risk to the extent that they influence the size or other conditionality of the obligation to pay upon a commitment (for example, in the case of index-linked bonds).

Fitch Long-Term issuer default ratings, as well as issue-level ratings, are on a rating scale that ranges from AAA (highest quality) to C (lowest quality). Within rating categories, Fitch may use modifiers. The modifiers "+" or "-" may be appended to a rating to denote relative status within major rating categories. Such suffixes are not added to 'AAA' ratings and ratings below the 'CCC' category.

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The instrument rating for an issuer's debt (whether secured, senior unsecured, or subordinated) is notched from the issuer's or guarantor's IDR. Rated entities with IDRs of 'BB–' and above usually have senior unsecured instrument ratings at the same level as the IDR, reflecting average (around 40%) rates of recovery across all sectors. For entities rated 'B+' and below, Fitch undertakes a 'bespoke' analysis of recovery upon default for each instrument. The resulting instrument rating reflects the Recovery Rating ("RR") (graded from 'RR1' to 'RR6'), and is notched from the IDR accordingly. Fitch divides the spectrum of recovery percentages from 0% to 100% within the six categories of RRs.

The credit ratings and stability ratings we received from S&P, Moody's and Fitch are not a recommendation to buy, sell or hold our securities and may be subject to revision or withdrawal at any time by any such credit rating organization. S&P, Moody's and Fitch each charged us a fee in respect of the credit ratings service they provided.

DIVIDENDS

Since September 2013, we have paid a semi-annual dividend in March and September of C$0.01 per share. At all times, the declaration of dividends is subject to the discretion of our Board of Directors.

MARKET FOR SECURITIES

PRICE RANGE AND TRADING VOLUME

Our common shares are listed on the TSX and the NYSE under the symbol "HBM". The volume of trading and the high and low trading price of our common shares on the TSX and NYSE during the periods indicated are set forth in the following table.

Trading of Common Shares on TSX				Trading of Common Shares on NYSE
Period (2020)	High (C$)	Low (C$)	Volume (common shares)	High ($)	Low ($)	Volume (common shares)
January	5.59	4.05	27,150,028	4.30	3.06	22,299,609
February	4.53	3.00	35,298,827	3.41	2.25	32,309,087
March	3.39	1.66	48,248,538	2.55	1.23	46,401,249
April	3.56	2.40	32,264,009	2.56	1.69	56,220,670
May	3.86	2.85	30,425,597	2.80	1.86	32,696,463
June	4.35	3.67	25,043,962	3.24	2.69	21,207,548
July	4.97	3.92	24,824,111	3.68	2.86	22,193,355
August	5.97	4.16	23,652,725	4.58	3.10	25,424,062
September	6.34	5.11	21,624,060	4.82	3.82	19,242,182
October	6.79	5.41	23,026,943	5.19	4.06	18,545,446
November	8.57	5.99	23,503,572	6.63	4.51	19,749,346
December	9.54	8.10	23,072,268	7.47	6.35	23,809,469

On March 26, 2021, the closing prices of our common shares on the TSX and NYSE were C$7.97 and $6.35 per common share, respectively.

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DIRECTORS AND OFFICERS

BOARD OF DIRECTORS

Carol T. Banducci Toronto, Ontario, Canada	Director since: May 4, 2017 Committee membership: •Audit Committee (Chair) •Environmental, Health, Safety and Sustainability ("EHSS") Committee	Ms. Banducci announced her retirement as Executive Vice President and Chief Financial Officer of IAMGOLD Corporation effective March 31, 2021. She joined IAMGOLD in July 2007, and, as CFO, has overseen all aspects of the company's finance, information technology and investor relations functions.
Igor Gonzales Lima, Peru	Director since: July 31, 2013 Committee memberships: •EHSS Committee •Technical Committee	Mr. Gonzales has more than 30 years of experience in the mining industry. He joined Appian Capital as Chief Operating Officer in June 2020 following over three years as President and CEO of Sierra Metals. Prior to that, he was with Compañia de Minas Buenaventura S.A.A. from November 2014 to May 2017, serving as Vice President of Operations and Barrick Gold Corporation from 1998 to 2013, serving as President of Barrick Gold South America for seven years, and later as Executive Vice President and Chief Operating Officer.
Richard Howes Toronto, Ontario, Canada	Director since: May 7, 2019 Committee memberships: •Compensation and Human Resources ("CHR") Committee •Technical Committee	Mr. Howes retired as President and Chief Executive Officer of Dundee Precious Metals Inc., in May 2020. He joined Dundee Precious Metals in early 2009 as General Manager and Executive Director and in 2010, was appointed Executive Vice President and Chief Operating Officer. He is a Professional Mining Engineer and is currently a corporate director.
Sarah B. Kavanagh Toronto, Ontario, Canada	Director since: July 31, 2013 Committee memberships: •EHSS Committee (Chair) •Corporate Governance and Nominating ("CGN") Committee	Ms. Kavanagh is a corporate director and a former Commissioner at the Ontario Securities Commission, where she served from June 2011 through May 2016. Between 1999 and 2010, Ms. Kavanagh served in a number of senior investment banking roles at Scotia Capital Inc. She has also held senior financial positions in the corporate sector.
Carin S. Knickel Golden, Colorado, United States	Director since: May 22, 2015 Committee memberships: •CHR Committee (Chair) •CGN Committee	Ms. Knickel served as Corporate Vice President, Global Human Resources of ConocoPhillips from 2003 until her retirement in May 2012. She joined ConocoPhillips in 1979 and held various senior operating positions in wholesale marketing, refining, transportation and commercial trading as well as leadership roles in planning and business development throughout her career in the U.S. and Europe. She is currently a corporate director.
Peter Kukielski Toronto, Ontario, Canada	Director since: May 7, 2019 Committee memberships: •None	Mr. Kukielski was appointed President and Chief Executive Officer in January 2020 after serving as Interim Chief Executive Officer since July 2019. Mr. Kukielski was President and Chief Executive Officer of Nevsun Resources Ltd. from May 2017 until its acquisition of Nevsun in December 2018. From 2013 to 2017, Mr. Kukielski was Chief Executive Officer of Anemka Resources and from 2008 to 2013, he was the Chief Executive, Mining for ArcelorMittal. From 2006 to 2008, Mr. Kukielski was the Chief Operating Officer of Teck Resources. From 2001 to 2006, he was with Falconbridge (originally Noranda) in senior roles, including Chief Operating Officer.

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Stephen A. Lang Columbia, Missouri, United States	Director since: October 3, 2019 Committee memberships: •CHR Committee •CGN Committee •Technical Committee	Mr. Lang was appointed Chair of Hudbay's Board of Directors in October 2019. He was Chief Executive Officer of Centerra Gold Inc. from 2008 to 2012 and served as Centerra's Board Chair from 2012 to 2019. Mr. Lang has also held positions at Stillwater Mining Company, Barrick Gold Corporation, Rio Algom Limited and Kinross Mining Corporation. He is currently a corporate director.
Daniel Muñiz Quintanilla Mexico City, Mexico	Director since: May 7, 2019 Committee memberships: •Audit Committee •EHSS Committee	Mr. Muñiz Quintanilla was a member of the Board of Directors and Executive Vice President of Southern Copper, previously acted as Executive President & Chief Executive Officer of Industrial Minera Mexico S.A. de C.V. and also acted as Chief Financial Officer of Grupo Mexico. He is currently a corporate director.
Colin Osborne Burlington, Ontario, Canada	Director since: May 2018 Committee memberships: •Technical Committee (Chair) •Audit Committee	Mr. Osborne is President and Chief Executive Officer of Samuel Son & Co. Limited, a $5 billion company focused on providing metal solutions to a variety of end markets. He joined Samuel Son & Co. in August 2015. From October 2007 through June 2015, Mr. Osborne was Chief Executive Officer and President of Vicwest Inc., and prior to that he was Chief Operating Officer at Stelco Inc. where his duties included overseeing mining operations.
David S. Smith West Vancouver, British Columbia Canada	Director since: May 7, 2019 Committee memberships: •CGN Committee (Chair) •CHR Committee	Mr. Smith served as the Chief Financial Officer and Executive Vice President of Finning International Inc. from 2009 to 2014. Prior to joining Finning, Mr. Smith served as Chief Financial Officer and a Vice President of Ballard Power Systems, Inc. from 2002 to 2009. Previously, he spent 16 years with Placer Dome Inc. in various senior positions and 4 years with PriceWaterhouseCoopers. He is currently a corporate director.

The term of office for each director of the Company will expire upon the completion of the next annual meeting of shareholders of the Company. Our executive officers as at the date of this AIF are listed below.

EXECUTIVE OFFICERS

Peter Kukielski Toronto, Ontario, Canada President and Chief Executive Officer	For biographical information for Mr. Kukielski, refer above to the heading "Board of Directors".
Steve Douglas Oakville, Ontario, Canada Senior Vice President and Chief Financial Officer	Mr. Douglas joined Hudbay as Senior Vice President and Chief Financial Officer effective June 30, 2020. Mr. Douglas has over 25 years of resource industry and finance leadership experience. Mr. Douglas was Senior Vice President and Chief Financial Officer at Agrium Inc. prior to its merger with Potash Corporation of Saskatchewan Inc. and served as Executive Vice President and Chief Integration Officer at its successor corporation, Nutrien Inc., until January 2019.
Eugene Lei Toronto, Ontario, Canada Senior Vice President, Corporate Development and Strategy	Mr. Lei joined Hudbay in 2012, after 11 years as an investment banker. Prior to joining Hudbay, Mr. Lei was Managing Director, Mining at Macquarie Capital Markets Canada, working as an advisor on global and domestic mergers and acquisitions and equity capital markets offerings. Prior to being appointed to his current role in January 2017, Mr. Lei was Vice President, Corporate Development.
Cashel Meagher Mississauga, Ontario, Canada Senior Vice President and Chief Operating Officer	Prior to being appointed to his current role in January 2016, Mr. Meagher was Vice President, South America Business Unit and oversaw the development of the Constancia mine. Prior to joining Hudbay in 2008, Mr. Meagher held management positions with Vale Inco in exploration, technical services, business analysis and mine operations.

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Peter Adamek Toronto, Ontario, Canada Vice President, Finance	Mr. Adamek was appointed Vice President, Finance in May 2019, overseeing financial reporting and information systems and technology. Since joining Hudbay in 2010, Mr. Adamek has held several progressively senior management roles, most recently as CFO for the Arizona Business Unit. Mr. Adamek has over 20 years of experience in a broad range of fields including corporate finance, capital markets, equity research and public audit. Prior to joining Hudbay, Mr. Adamek worked as a research associate at RBC Capital Markets Global Mining division.
Peter Amelunxen Toronto, Ontario, Canada Vice President, Technical Services	Mr. Amelunxen joined Hudbay in September 2018.  Mr. Amelunxen has experience working in various jurisdictions and has worked for 20 years in diverse roles including consulting, grinding and flotation circuit modeling, plant operations, engineering and laboratory testing.
Robert Assabgui Sudbury, Ontario, Canada Vice President, Manitoba Business Unit	Mr. Assabgui was appointed Vice President, Manitoba Business Unit in April 2018, following a year in the role of Vice President, Technical Services. He is an accomplished senior operations manager with over 30 years of progressive experience in operations, project management and engineering in the mining industry. Prior to joining the company in 2017, Mr. Assabgui was Director, Mining at Vale's Sudbury Operations.
David Clarry Toronto, Ontario, Canada Vice President, Corporate Social Responsibility	Mr. Clarry joined Hudbay in 2011. From 2009 to 2011 he worked through his own firm, Innotain Inc., providing consulting services to the mining and energy industries. Prior to that he spent 18 years with Hatch Ltd., an international engineering and consulting firm, ultimately as Director - Climate Change Initiatives.
Javier Del Rio Lima, Peru Vice President, South America Business Unit	Prior to being appointed to his current role in 2017, Mr. Del Rio was Executive Director, Business Development - South America. Mr. Del Rio joined Hudbay in 2010 and has over 25 years of mining experience. He has held management positions in business planning, optimization process, and business analysis with Newmont Mining Corporation in the United States and Peru.
Patrick Donnelly Oakville, Ontario, Canada Vice President and General Counsel	Prior to being appointed to his current role in 2014, Mr. Donnelly was Vice President, Legal and Corporate Secretary for over three years. Prior to joining Hudbay in 2008, Mr. Donnelly practiced corporate and securities law at Osler, Hoskin & Harcourt LLP.
Jon Douglas Toronto, Ontario, Canada Vice President and Treasurer	Mr. Douglas joined Hudbay in 2015. Prior to joining Hudbay, he was Chief Financial Officer of Barrick Gold Corporation's global copper business unit. Prior to that he was Senior Vice President and Chief Financial Officer of Northgate Minerals Corporation for over ten years.
Elizabeth Gitajn Toronto, Ontario, Canada Vice President, Risk Management	Ms. Gitajn joined Hudbay in 2015, prior to which she was Corporate Controller for IAMGOLD Corporation since 2012. From 2007 to 2012, she held various management positions within Barrick Gold Corporation in the finance areas of risk management, financial reporting and planning. Ms. Gitajn also spent 14 years in public accounting in the United States, nine of which were with Arthur Andersen LLP.
André Lauzon Tucson, Arizona, United States Vice President, Arizona Business Unit	Mr. Lauzon was appointed Vice President, Arizona Business Unit in April 2018, following almost two years in the role of Vice President, Manitoba Business Unit. Mr. Lauzon has experience with both open pit and underground mines. He has worked in and supported projects and mines in a wide range of challenging locations and conditions, from Voisey's Bay in Newfoundland, to Turkey, Alaska, Australia, Indonesia, Brazil and most recently, northern Ontario, with Vale.
Olivier Tavchandjian Toronto, Ontario, Canada Vice President, Exploration and Geology	Mr. Tavchandjian joined Hudbay in September 2017 and brings 25 years of experience in mineral resource and mineral reserve estimation and reporting, exploration, strategic and life of mine planning, technical support to operations and corporate development. Prior to joining Hudbay, Mr. Tavchandjian was VP Resource Evaluation for Anemka Resources, the mining portfolio company of a large private investment firm.

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As of March 26, 2021, our directors and executive officers, as a group, beneficially owned, directly or indirectly, or exercised control or direction over, 675,436 common shares, representing less than 0.3% of the total number of common shares outstanding.

CORPORATE CEASE TRADE ORDERS, BANKRUPTCIES, PENALTIES AND SANCTIONS

Stephen A. Lang was a director of Hycroft Mining Corporation ("Hycroft"), (formerly Allied Nevada Gold Corp.) which, on March 10, 2015, together with certain of its direct and indirect subsidiaries, filed voluntary petitions of relief under Chapter 11 of the U.S. Bankruptcy Code in the United States Bankruptcy Court for the District of Delaware (the "Delaware Bankruptcy Court"). On October 8, 2015, Hycroft's Plan of Reorganization was approved by the Delaware Bankruptcy Court, and effective October 22, 2015, Hycroft completed its financial restructuring process and emerged from Chapter 11 bankruptcy.

Carin S. Knickel was a director of Whiting Petroleum Corp. ("Whiting") which, on March 31, 2020, together with certain of its subsidiaries, commenced voluntary Chapter 11 cases under the United States Bankruptcy Code in the U.S. Bankruptcy Court for the Southern District of Texas (the "Texas Bankruptcy Court"). On September 1, 2020, Whiting announced that it has successfully completed its financial restructuring and emerged from Chapter 11 protection. Whiting officially concluded its reorganization after completing all required actions and satisfying the remaining conditions to its Plan of Reorganization.

CONFLICTS OF INTEREST

To the best of our knowledge, there are no known existing or potential conflicts of interest among or between us, our subsidiaries, our directors, officers or other members of management, as a result of their outside business interests, except that certain of our directors, officers, and other members of management serve as directors, officers, promoters and members of management of other entities and it is possible that a conflict may arise between their duties as a director, officer or member of management of Hudbay and their duties as a director, officer, promoter or member of management of such other entities.

Our directors and officers are aware of the existence of laws governing accountability of directors and officers for corporate opportunity and requiring disclosures by directors of conflicts of interest and we will rely upon such laws in respect of any directors' and officers' conflicts of interest or in respect of any breaches of duty by any of our directors or officers. All such conflicts are required to be disclosed by such directors or officers in accordance with the CBCA, and such individuals are expected to govern themselves in respect thereof to the best of their ability in accordance with the obligations imposed upon them by law. In addition, our Code of Business Conduct and Ethics requires our directors and officers to act with honesty and integrity and to avoid any relationship or activity that might create, or appear to create, a conflict between their personal interests and our interests.

AUDIT COMMITTEE DISCLOSURE

The Audit Committee is responsible for monitoring our systems and procedures for financial reporting and internal control, reviewing certain public disclosure documents, monitoring the performance and independence of our external auditors and the assessment, monitoring and management of the strategic, operational, reporting and compliance risks of the Company's business. The Audit Committee is also responsible for reviewing our annual audited consolidated financial statements, unaudited consolidated quarterly financial statements and management's discussion and analysis of results of operations and financial condition for annual and interim periods prior to their approval by the full board of directors. There was no instance in 2020 where our board of directors declined to adopt a recommendation of the Audit Committee.

The Audit Committee's charter sets out its responsibilities and duties, qualifications for membership, procedures for committee appointment and reporting to our board of directors. A copy of the current charter is attached hereto as Schedule C.

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COMPOSITION

As at December 31, 2020, the Audit Committee consisted of Carol T. Banducci (Chair), Daniel Muñiz Quintanilla and Colin Osborne.

Relevant Education and Experience

Each member of the Audit Committee is independent and financially literate within the meaning of NI 52-110. Set out below is a description of the education and experience of each Audit Committee member that is relevant to the performance of his or her responsibilities as an Audit Committee member.

Ms. Banducci announced her retirement as Executive Vice President and Chief Financial Officer of IAMGOLD Corporation effective March 31, 2021. She joined IAMGOLD in July 2007, and, as CFO, she has overseen all aspects of the company's finance, information technology and investor relations functions. From 2005 to 2007, Ms. Banducci was Vice President, Financial Operations of Royal Group Technologies. Previous executive finance roles include Chief Financial Officer of Canadian General-Tower Limited and Chief Financial Officer of Orica Explosives North America and ICI Explosives Canada & Latin America. Ms. Banducci has extensive finance experience in capital markets, statutory and management reporting, audit, budgeting, capital programs, treasury, tax, acquisitions and divestments, pension fund management, insurance and information technology. She holds a Bachelor of Commerce degree from the University of Toronto.

Mr. Muñiz Quintanilla was a member of the Board of Directors and Executive Vice President of Southern Copper, previously acted as Executive President & Chief Executive Officer of Industrial Minera Mexico S.A. de C.V. and also acted as Chief Financial Officer of Grupo Mexico. In the past, he worked at the Law Firms Cortes, Muniz y Nunez Sarrapy, Mijares, Angotia Cortes y Fuentes, and Baker & McKenzie. He holds a Masters degree in Business Administration from Instituto de Empresa and a Masters degree in Financial Law from Georgetown University.

Mr. Osborne is President and Chief Executive Officer of Samuel Son & Co., Limited, a $5 billion company focused on providing metal solutions to a variety of end markets.  In this position, which he has held since 2018, Mr. Osborne oversees all aspects of the company including corporate functions. Within Samuel, Mr. Osborne held prior roles of President - Samuel Service Centers and Automotive, and President - Samuel Manufacturing Division. Before joining Samuel in 2015, Mr. Osborne was President and Chief Executive Officer of Vicwest Inc., a publicly traded industrial products company with operations in North America, Europe, South America and installations on six continents. Earlier in his career, Mr. Osborne held senior leadership positions at Stelco Inc. including COO and EVP Strategy, where his duties included overseeing mining operations.  Mr. Osborne has extensive board experience and currently also sits on the Board of Samuel, Son & Co.  Previously, Mr. Osborne sat on the board of numerous public and private equity run businesses including Strongco Inc. and TMS International (Onex and TPO). He holds a Bachelor of Engineering in Mining and Metallurgy from McGill University and has completed the Executive Management Program from the Smith School of Business at Queen's University.

POLICY REGARDING NON-AUDIT SERVICES RENDERED BY AUDITORS

We have adopted a policy requiring Audit Committee pre-approval of non-audit services. Specifically, the policy requires that proposals seeking approval by the Audit Committee for routine and recurring non- audit services describe the terms and conditions and fees for the services and include a statement by the independent auditor and Chief Financial Officer that the provision of those services could not be reasonably expected to compromise or impair the auditor's independence. The Audit Committee may pre- approve non-audit services without the requirement to submit a specific proposal, provided that any such pre-approval on a general basis shall be applicable for twelve months. The Chair of the Audit Committee has been delegated authority to pre-approve, on behalf of the Audit Committee, the provision of specific non-audit services by the independent auditor where (a) it would be impractical for the services to be provided by another firm; or (b) the estimated fees associated with such services are not expected to exceed C$50,000. Any approvals granted under this delegated authority are to be presented to the Audit Committee at its next scheduled meeting.

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REMUNERATION OF AUDITOR

The following table presents, by category, the fees billed by Deloitte LLP as external auditor of, and for other services provided to, the Company for the fiscal years ended December 31, 2020 and 2019.

Category of Fees	2020	2019
Audit fees	C$2,040,365	C$2,464,702
Audit-related fees	C$311,853	C$122,396
Tax fees	-	-
All other fees	-	C$96,600
Total	C$2,352,218	C$2,683,698

"Audit fees" include fees for auditing annual financial statements and reviewing the interim financial statements, as well as services normally provided by the auditor in connection with our statutory and regulatory filings. "Audit-related fees" are fees for assurance and related services that are reasonably related to the performance of the audit or review of our financial statements and are not reported under "Audit fees", including audit work related to our pension, benefit and profit sharing plans, and work related to our joint venture in respect of the Reed mine. "All other fees" are fees for services other than those described in the foregoing categories. Management presents regular updates to the Audit Committee of the services rendered by the auditors as part of the Audit Committee's oversight regarding external auditor independence and pre-approved service authorizations.

LEGAL PROCEEDINGS AND REGULATORY ACTIONS

LEGAL PROCEEDINGS

Hudbay is subject to three claims in the Ontario Superior Court in connection with its previous ownership of the Fenix project in Guatemala through its subsidiary at the time, Compañía Guatemalteca de Níquel S.A. ("CGN").

The first action was served in 2010. The plaintiff, Angelica Choc, asserts a claim of negligence against Hudbay and wrongful death, among other claims, against CGN in connection with the death of her husband Adolfo Ich Chaman on September 27, 2009. The plaintiff claims that the head of CGN security shot and killed Mr. Chaman during a confrontation between members of local communities, who were unlawfully occupying CGN property, and CGN personnel. The aggregate amount of the claim is C$12 million.

In the second action, served in 2011, eleven plaintiffs claim that they were victims of sexual assault committed by CGN security and members of the Guatemalan police and army during court ordered and state implemented evictions in January 2007 (before the project was acquired by Hudbay). These claims are asserted against Hudbay and its subsidiary at the time HMI Nickel Inc. The aggregate amount of the claims is C$55 million.

The plaintiff in the third action, German Chub Choc, claims that he was shot and permanently injured by the head of CGN security during the same events that gave rise to the claim brought by Ms. Choc. This action was served in October 2011. The aggregate amount of the claim is C$12 million.

We believe that all of the claims with respect to the Fenix project are without merit.

We are not aware of any litigation outstanding, threatened or pending against us as of the date hereof that would reasonably be expected to be material to our financial condition or results of operations.

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REGULATORY ACTIONS

We have not: (a) received any penalties or sanctions imposed against us by a court relating to securities legislation or by a securities regulatory authority during the financial year; (b) received any other penalties or sanctions imposed by a court or regulatory body that would likely be considered important to a reasonable investor in making an investment decision; and (c) entered any settlement agreements with a court relating to securities legislation or with a securities regulatory authority during the financial year.

INTEREST OF MANAGEMENT AND OTHERS IN MATERIAL TRANSACTIONS

Except pursuant to the agreement with Waterton or as otherwise disclosed in this AIF, since January 1, 2018, none of our directors, executive officers or 10% shareholders and no associate or affiliate of the foregoing persons has or has had any material interest, direct or indirect, in any transaction that has materially affected or is reasonably expected to materially affect us.

TRANSFER AGENT AND REGISTRAR

The transfer agent and registrar for our common shares is TSX Trust Company at its principal office in Toronto, Ontario.

MATERIAL CONTRACTS

Except for those contracts entered into in the ordinary course of our business, the following are the material contracts we entered into (i) within the last financial year or (ii) between January 1, 2002 and the beginning of the last financial year, which are still in effect:

1.the Precious Metals Purchase Agreement dated August 8, 2012, as amended, with Wheaton Precious Metals (previously Silver Wheaton), whereby we agreed to sell a portion of the precious metals production from our 777 mine to Wheaton Precious Metals.

2.the Amended and Restated Precious Metals Purchase Agreement dated November 4, 2013, as amended, with Wheaton Precious Metals (International) Ltd. ("Wheaton International", previously Silver Wheaton (Caymans) Ltd.), whereby we agreed to sell 100% of the silver production and 50% of the gold production from our Constancia mine to Wheaton International.

3.the Amended and Restated Precious Metals Purchase Agreement, dated as of February 8, 2019 between HudBay Arizona (Barbados) SRL, Hudbay, Wheaton International and Wheaton Precious Metals;

4.the Indenture dated as of September 23, 2020 with U.S. Bank National Association, as trustee, governing the Senior Unsecured Notes expiring in 2029;

5.the Indenture dated as of March 8, 2021 with U.S. Bank National Association, as trustee, governing the Senior Unsecured Notes expiring in 2026;

6.the Fourth Amended and Restated Credit Facility with the lenders party thereto from time to time and The Bank of Nova Scotia, as administrative agent, dated as of July 14, 2017, as amended, providing for a four year $250 million revolving credit facility; and

7.the Second Amended and Restated Credit Facility with the lenders party thereto from time to time and The Bank of Nova Scotia, as administrative agent, dated as of July 14, 2017, as amended, providing for a four year $150 million revolving credit facility.

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QUALIFIED PERSONS

The scientific and technical information contained in this AIF related to the Rosemont project has been approved by Cashel Meagher, P.Geo., our Senior Vice President and Chief Operating Officer. The scientific and technical information contained in this AIF related to all other material mineral projects has been approved by Olivier Tavchandjian, P.Geo., our Vice President, Exploration and Geology. Messrs. Meagher and Tavchandjian are qualified persons pursuant to NI 43-101. For a description of the key assumptions, parameters and methods used to estimate mineral reserves and resources, as well as data verification procedures and a general discussion of the extent to which the estimates may be affected by any known environmental, permitting, legal title, taxation, sociopolitical, marketing or other relevant factors, please see the technical reports for our material properties as filed by us on SEDAR at www.sedar.com.

INTERESTS OF EXPERTS

Cashel Meagher, P.Geo. and Olivier Tavchandjian, P.Geo., are experts who have prepared certain technical and scientific reports for us. As at the date hereof, to our knowledge, the aforementioned persons beneficially own, directly or indirectly, less than 1% of our outstanding securities and have no other direct or indirect interest in our company or any of its associates or affiliates.

The auditor of the Company is Deloitte LLP. Deloitte LLP is independent with respect to the Company within the meaning of the rules of professional conduct of the Chartered Professional Accountants of Ontario and within the meaning of the Securities Act of 1933, as amended and the applicable rules and regulations thereunder adopted by the SEC and the Public Company Accounting Oversight Board (United States) (PCAOB).

ADDITIONAL INFORMATION

Additional information, including directors' and officers' remuneration and indebtedness, principal holders of our securities and securities authorized for issuance under equity compensation plans, as applicable, is contained in our management information circular dated April 14, 2020. Additional financial information is provided in our financial statements and management's discussion and analysis for the fiscal year ended December 31, 2020.

Additional information relating to the Company may be found on SEDAR at www.sedar.com and on EDGAR at www.sec.gov.

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SCHEDULE A: GLOSSARY OF MINING TERMS

The following is a glossary of certain mining terms used in this annual information form.

"mineral reserves"	That part of a measured or indicated mineral resource which could be economically mined, demonstrated by at least a preliminary feasibility study that includes adequate information on mining, processing, metallurgical, economic and other relevant factors that demonstrate, at the time of reporting, that economic extraction can be justified. A mineral reserve includes diluting materials and allowances for losses that may occur when the material is mined. Mineral reserves are those parts of mineral resources which, after the application of all mining factors, result in an estimated tonnage and grade which, in the opinion of the qualified person(s) making the estimates, is the basis of an economically viable project after taking account of all relevant processing, metallurgical, economic, marketing, legal, environment, socio-economic and government factors. Mineral reserves are inclusive of diluting material that will be mined in conjunction with the mineral reserves and delivered to the treatment plant or equivalent facility. The term "mineral reserve" need not necessarily signify that extraction facilities are in place or operative or that all governmental approvals have been received. It does signify that there are reasonable expectations of such approvals. Mineral reserves are subdivided into proven mineral reserves and probable mineral reserves. Mineral reserves fall under the following categories:
"proven mineral reserves"	That part of a measured mineral resource that is the economically mineable part of a measured mineral resource, demonstrated by at least a preliminary feasibility study that includes adequate information on mining, processing, metallurgical, economic, and other relevant factors that demonstrate, at the time of reporting, that economic extraction is justified.
"probable mineral reserves"	That part of an indicated and in some circumstances a measured mineral resource that is economically mineable demonstrated by at least a preliminary feasibility study that includes adequate information on mining, processing, metallurgical, economic, and other relevant factors that demonstrate, at the time of reporting, that economic extraction can be justified.
"mineral resources"	A concentration or occurrence of natural, solid, inorganic or fossilized organic material in or on the Earth's crust in such form and quantity and of such a grade or quality that it has reasonable prospects for economic extraction. The location, quantity, grade, geological characteristics and continuity of a mineral resource are known, estimated or interpreted from specific geological evidence and knowledge. Mineral resources fall under the following categories:
"measured mineral resource"	That part of a mineral resource for which quantity, grade or quality, densities, shape and physical characteristics are so well established that they can be estimated with confidence sufficient to allow the appropriate application of technical and economic parameters to support production planning and evaluation of the economic viability of the deposit. The estimate is based on detailed and reliable exploration, sampling and testing information gathered through appropriate techniques from locations such as outcrops, trenches, pits, workings and drill holes that are spaced closely enough to confirm both geological and grade continuity.
"indicated mineral resource"	That part of a mineral resource for which quantity, densities, shape and physical characteristics can be estimated with a level of confidence sufficient to allow the appropriate application of technical and economic parameters and to support mine planning and evaluation of the economic viability of the deposit. The estimate is based on detailed and reliable exploration and testing information gathered through appropriate techniques from locations such as outcrops, trenches, pits, workings and drill holes that are spaced closely enough for geological and grade continuity to be reasonably assumed.
"inferred mineral resource"	That part of a mineral resource for which quantity and grade or quality can be estimated on the basis of geological evidence and limited sampling and reasonably assumed, but not verified, geological and grade continuity. The estimate is based on limited information and sampling gathered through appropriate techniques from locations such as outcrops, trenches, pits, workings and drill holes.

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SCHEDULE B: MATERIAL MINERAL PROJECTS

CONSTANCIA MINE

Project Description, Location and Access

We own a 100% interest in the Constancia mine in southern Peru. Constancia includes the Constancia and Pampacancha deposits and is located approximately 600 kilometres southeast of Lima at elevations of 4,000 to 4,500 metres above sea level. Geographic coordinates at the centre of the property are longitude 71° 47' west and latitude 14° 27' south.

We acquired Constancia in March 2011 through our acquisition of all of the outstanding shares of Norsemont Mining Inc. ("Norsemont"). We own a 100% interest in the 66 mining concessions (covering an area of 43,536 hectares) that comprise Constancia, all of which are duly registered in the name of our wholly-owned subsidiary, HudBay Peru S.A.C. Most of the known mineralization is located in the claims Katanga J, Katanga O, Katanga K, and Peta 7, though small mineralized outcrops are common throughout the area. All the mining concessions are currently in good standing. The annual concession fee payments of $3.00 per hectare are due on June 30 each year.

We have entered into life-of-mine agreements with the neighbouring communities of Chilloroya and Uchuccarco. These agreements provide us the surface rights required for operations and specify our commitments to these local communities over the course of the mine life. In particular, the community agreements contemplated cash payments for the land access rights, as well as funds for facilitation of development projects and investment for local enterprises. The agreements also outline ongoing annual investments in community development including medical, educational and agricultural services and contemplate a bi-annual review of certain of the social development terms. We have also entered into an agreement with the community of Chilloroya for the Pampacancha surface rights.

The Constancia mine reached commercial production in the second quarter of 2015 and reached steady state design production in the second half of 2015.

Hudbay has presented a third amendment to the Environmental and Social Impact Assessment (ESIA) (ESIA MOD III) to provide Constancia and Pampacancha with an early discharge from the TMF supernatant, which is intended only as a contingency. Further it will allow for the optimization of the water balance and management plan, an alternate access road for transportation of the concentrate, improvements to the TMF dike design criteria and other benefits. The ESIA MOD III is in its final stage of approval. As soon as approved specific permitting processes and mine closure plan amendments will commence.

In addition, the permits required for the pre-stripping and operation of the Pampacancha Pit have all been obtained. The Ministry of Energy and Mines authorized the start of the exploitation activities for the Pampacancha pit in December 2020. This permit included the Prior Consultation process with the community of Chilloroya. Hudbay has also received approval for one of the three stages of Pampacancha pit drainage permits; the next stage will be evaluated by the National Water Authority in March 2021. The explosives permit has been under evaluation since January 2021.

Constancia is subject to the following tax regime and agreement concerning mineral production:

1. Peruvian Tax Regime

Constancia is subject to the Peruvian tax regime, which includes the mining tax, mining royalty, 8% labour participation, corporate tax and IGV/VAT. The Special Mining Tax ("SMT") and the Mining Royalty ("MR") were introduced in late-2011 for companies in the mineral extractive industries. Both the SMT and the MR are applicable to mining operating income based on a sliding scale with progressive marginal rates. The effective tax rate is calculated according to the operating profit margin of the Company. Based on Constancia's expected life-of-mine operating profit margin, the effective SMT and MR tax rates are projected to be 2.70% and 2.37% of operating income over the life of the mine. The MR is subject to a minimum of 1% of sales during a given month.

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2. Precious Metals Stream Agreement

100% of Constancia's silver production and 50% of its gold production is subject to our agreement with Wheaton Precious Metals, as described in this AIF.

Accessibility, Climate, Local Resources, Infrastructure and Physiography

Constancia is accessible from Lima by flying to either Arequipa or Cusco and then proceeding by paved and gravel highway to the mine site, which in each case takes approximately seven hours. The closest town is Yauri (population 23,000), which is approximately 80 kilometres by road from the mine site. Copper concentrate is transported via Yauri to the Matarani port, which is approximately 460 kilometres by road from the mine site.

The climate of the region is typical of the Peruvian altiplano in which the seasons are divided into the wet season between October and March with slightly higher temperatures and a dry season during April to September with colder temperatures. Temperatures can dip below -10° Celsius and rise to 20° Celsius. The sun can be very strong with high ultraviolet readings being common during the mid-day period. There is a climate monitoring station installed at the mine site.

Elevations on the property range from 4,000 to 4,500 metres above sea level with moderate relief and grass-covered altiplano terrain. Slopes are typically covered with grasses at lower elevations. At higher elevations, talus cover is common with very little vegetation. The grasslands are used as pasture for animals and at lower elevations for some limited subsistence agriculture. Water resources are readily available from a number of year-round streams near the mine site.

The infrastructure includes the waste rock facility, tailings management facility, water management system, electrical power supply and transmission and improvements to the roads and port. The primary road to the site consists of a 70 kilometre sealed road (National Route PE-3SG) from Yauri to the Livitaca turn-off and approximately 10 kilometres of unsealed road (CU-764) from the Livitaca turn-off to site. These roads (and bridges) have been upgraded, as necessary, to meet the needs for construction and life of mine use.

Constancia's maximum demand for electricity is estimated to be 96 MW with an average load of 85 to 90 MW in the next 5 years. Electricity is supplied via the 220 kV Tintaya substation located about 70 kilometres from the mine site and a dedicated transmission line from this substation to Constancia.

Copper concentrate is shipped from the Constancia Mine via road (~460 kilometres) and arrives at the Matarani port in trucks. These trucks are equipped with a hydraulically operated covered-box hinged at the rear, the front of which can be lifted to allow the concentrate to be deposited in the concentrate shed assigned to Hudbay by TISUR, the port operator. Pier C has been assigned to Hudbay and has a 75 thousand tonne capacity. A chute from the shed will feed a conveyor system in a tunnel below. This feed conveyor has a 1,000 metric tonnes per hour capacity. The same conveyor and ship loading equipment will be shared with other copper concentrate exporters.

History

The original Constancia property, consisting of 13 concessions, was obtained by Norsemont pursuant to an option agreement with Rio Tinto Mining and Exploration Ltd. ("Rio Tinto"). Norsemont acquired an initial 51% interest in the property from Rio Tinto in November 2007 and in March, 2008, Norsemont acquired the remaining 19% interest held by Rio Tinto. Norsemont acquired the 30% interest in the project from Mitsui Mining and Smelting Company Limited Sucursal Del Peru ("Mitsui") and 23 additional concessions were obtained by Norsemont in 2007 and 2008.

The San Jose prospect (which forms part of the Constancia deposit) was explored by Mitsui during the 1980s. Exploration consisted of detailed mapping, soil sampling, rock chip sampling, and ground magnetic and induced polarization surveys with several drill campaigns. Drilling was mainly focused on the western and southern sides of the prospect. Mitsui completed 24 drill holes (4,200 metres) and Minera Katanga completed 24 shallow close-spaced drill holes at San Jose (1,200 metres).

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In 1995, reconnaissance prospecting by Rio Tinto identified evidence for porphyry style mineralization exposed over an area 1.4 x 0.7 kilometres, open in several directions, with some copper enrichment below a widespread leach cap developed in both porphyry and skarn.

In May 2003, Rio Tinto revisited the area and the presence of a leached cap and the potential for a significant copper porphyry deposit were confirmed.

The Rio Tinto exploration activities consisted of geological mapping, soil, and rock chip sampling, and surface geophysics (magnetics and induced polarization). Rio Tinto completed 24 diamond drill holes for a total of 7,500 metres.

Geological Setting, Mineralization, and Deposit Types

The Constancia deposit is a porphyry copper-molybdenum system which includes copper-bearing skarn mineralization. This type of mineralization is common in the Yauri-Andahuaylas metallogenic belt where several porphyry Cu-Mo-Au prospects have been described but not exploited. Multiple phases of monzonite and monzonite porphyry have intruded a sequence of sandstones, mudstones and micritic limestone of Cretaceous age. Structural deformation has played a significant role in preparing and localising the hydrothermal alteration and copper-molybdenum-silver-gold mineralization, including skarn formation. The skarn component of the mineralization is more prevalent along the Yanak fault on the western margin of the Constancia deposit. Recent drilling conducted in 2019-2020 has confirmed a 300m extension of both high grade skarn and shallow porphyry mineralization to the north of deposit into the Constancia North area.

The Pampacancha deposit is a porphyry related skarn system, with copper-bearing skarn mineralization. This type of mineralization is common in the Yauri-Andahuaylas metallogenic belt where several skarn deposits have been developed, including Corocohuayco in the Tintaya District and Las Bambas.

The Constancia porphyry copper-molybdenum system, including skarn, exhibits five distinct deposit types of mineralization:

1.Hypogene fracture-controlled and disseminated chalcopyrite mineralization in the monzonite (volumetrically small);

2.Hypogene chalcopyrite (rare bornite) mineralization in the skarns (significant);

3.Supergene digenite-covellite-chalcocite (rare native copper) in the monzonite (significant);

4.Mixed secondary sulphides/chalcopyrite in the monzonite (significant); and

5.Oxide copper mineralization (volumetrically small).

Molybdenite, gold and silver occur within all these mineralization types.

Two areas of porphyry-style mineralization are known within the project area, Constancia and San José. At Constancia, mineralization is deeper than that observed at San José which occurs at surface. The mineralized zone extends about 1,200 metres in the north-south direction and 800 metres in the east- west direction.

The Pampacancha deposit is located approximately three kilometers southeast of the Constancia porphyry. The stratigraphy unit in the area is the massive, gray micritic limestone of Upper Cretaceous Ferrobamba Formation; this unit in contact with the dioritic porphyry generates a magnetite skarn, hosts economic mineralization of Cu-Au-Mo.

The intrusive rocks are Oligocene age unmineralized basement diorite. Diorite porphyry is recognized as the source for skarn mineralization, which in turn is cut by mineralized monzonite intrusions which provide minor local increases in Cu-Au mineralization. Skarn Cu-Au mineralization is best developed at the upper and lower margins of the limestone body.

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Epithermal mineralization of the low sulphidation quartz-sulphides Au + Cu style, accounts for common supergene enriched Au anomalies, and along with other features such as hydrothermal alteration and veins typical of near porphyry settings.

Exploration

A geophysical Titan-24 survey was completed in July 2011 to the south of the Constancia deposit. In late 2013, an aeromagnetic and radiometric helicopter geophysical survey was carried out over an area of 80 square kilometers near Constancia.

A mapping and geochemical sampling program was completed between 2007 to 2014, where 20,789 hectares were mapped. Of the 20,789 hectares, 8,905 were mapped on Hudbay mining concessions, which represent 80% of the mining rights in the area.

Future exploration efforts are anticipated to focus on Hudbay's prospective satellite properties located within trucking distance of the Constancia mill, as described in this AIF.

Drilling

Extensive drilling has been conducted at the Constancia and Pampacancha deposits since the early 2000s. The three most recent drilling programs were completed by Hudbay, with prior drilling programs conducted by Rio Tinto and Norsemont Mining. In 2019 and 2020, 36 diamond drill holes were completed in order to define the geometry and extent of high grade skarn zones and porphyry mineralization at the Constancia North satellite deposit. This new drilling has been incorporated in the 2020 resource model. The various drilling campaigns conducted at Constancia and Pampacancha totaled 225,000 meters of drilling with approximately 93% of the drilling being conducted by diamond drilling (coring) methods and only 7% done by reverse circulation (RC).

Out of the total drilling completed over the two deposits, 492 holes (143,818m) at Constancia and 147 holes (39,696m) at Pampacancha were used to conduct grade estimation within the mineralized envelopes and to report the current mineral resource and mineral reserve estimates.

Sampling and Analysis and Security of Samples

The sample preparation, analysis, security procedures and data verification processes used in the exploration campaigns on the Constancia mine prior to our acquisition were reviewed through the documentation available in previously filed technical reports and we have determined that the sampling methodology, analyses, security measures and data verification processes were adequate for the compilation of data at Constancia and Pampacancha and such processes continue to be used by us.

1,849 and 633 bulk density measurements were respectively used for the resource block models of Constancia and Pampacancha. These measurements were conducted at ALS Chemex, Certimin and Bureau Veritas laboratories using the paraffin wax coat method. These measurements are representative of the different rock and mineralization domains recognized to date.

During the Hudbay drilling campaigns conducted between 2011 and 2015, blanks were inserted into the sample stream as per geologist instruction at approximate intervals of every 30 samples. Standard references were prepared with material obtained from the Constancia and Pampacancha deposits by us and were analyzed and certified by Acme labs. Duplicates were obtained by splitting half core samples, obtaining two quarter core sub-samples, one quarter representing the original sample and the other quarter representing the duplicate sample. Duplicates were inserted approximately every 30 samples.

As for the 2017 twin hole and the 2019 drilling programs, 14% of blanks and 5% of standards were inserted at site, prior to dispatching the core boxes to Certimin, Bureau Veritas or SGS laboratories. In addition, 10% of all the pulps samples and 6% of all the coarse reject samples were reclaimed. 50% were resent to the initial laboratory and the other 50% were sent to an umpire lab for duplicate analysis. 5% of blanks, 5% of standards and 5% of duplicates were added to the re-analysis streams.

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During the 2019-2020 drilling campaign, all the samples were prepared at the Constancia mine laboratory and dispatched to Bureau Veritas for ICP analysis. 5% blanks and 15% standards were inserted at site, before samples preparation and after samples preparation, to monitor both the sample preparation and the assaying, Finally, coarse and pulp rejects were reclaimed and re-assayed at Bureau Veritas Lima. Selected pulps we also dispatched to the Umpire lab (SGS Lima). The inserted the blanks and standards analyzed by Bureau Veritas and SGS were submitted as "blind".

Data Validation

Assay data was delivered in digital form by the laboratories. Checks for inconsistent values were made by the senior geologist before data was uploaded.

All lithological, alteration, geotechnical and mineralization data was logged on paper logs that were later entered in spreadsheets from where they were imported into the database. The data entry spreadsheets have a number of built-in logical checks to improve the validity of the database. We checked collar positions visually on plans and down-hole surveys were validated by examining significant deviations.

In 2017, 17 holes representing over 4,167 metres of sampling previously drilled by Norsemont and Hudbay and covering the full extent of the Constancia reserve pit were twined in order to further investigate the impact of suspected losses of fine material in the original drilling both on grade estimation and on the metallurgical model. The 2017 twin hole evidenced an under-estimation bias in the copper grade in the historical drilling for the supergene portion of the Constancia deposit. A robust correction was developed to address this grade bias.

In 2020, Hudbay conducted a systematic revalidation of the drillhole database used in the MineSight software for resource modeling by comparing 5% of the entire database to the original laboratory certificates. From the 4089 samples tested, only 4 samples were found to have different values than in the original certificates representing 0.09% of the total and therefore the database can be considered very reliable. A comparison with the previous version of the resource modelling database used between 2014 and 2019 evidenced that elements precisions had been truncated to the second decimal place in the past resulting in an under-estimation in gold grade in the 2019 database and no significant differences for the other metals of economic interest. The under-estimation in gold grade is close to 10% and has been corrected, contributing to an improvement in the gold grade in the updated mineral resource and mineral reserve estimates.

Mineral Processing and Metallurgical Testing

The metallurgical responses of Constancia ore (ex: Hypogene, Supergene, Skarn, Mixed and High Zinc) is acceptable in terms of treatment rate, recovery and molybdenum and copper concentrate grades. For example, the copper grade in the final concentrate is higher than 26%, with acceptable levels of zinc, lead, iron, etc. The molybdenum concentrate produced is over 47% molybdenum with low contents of copper, lead, iron, etc. Metallurgical test work performed at laboratory and plant levels with Hypogene, Skarn, Supergene, High Zinc and Mixed ore from different polygons have enabled the operator to identify different reagents which show better performance according to each type of ore treated.

Feasibility study testwork was finalized in 2020 for the Pampacancha ore and has confirmed the ore recovery and throughput assumption currently used in the Life of Mine plan.

For the production year 2020, the Constancia plant achieved an average copper recovery of 83.0%. Copper recoveries over the remaining life of mine are expected to average 86%. The recoveries will vary based on ore type and processing plant flow sheet improvements currently in progress.

Mineral Resource and Mineral Reserve Estimates

The mineral resource and mineral reserve estimates for the Constancia and Pampacancha properties are effective January 1, 2021. Other than as disclosed in this AIF, there are no known metallurgical, environmental, permitting, legal, taxation, socio-economic, marketing or political issues that could reasonably be expected to materially impact the mineral resource and mineral reserve estimates.

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Resource estimations for the Constancia and Pampacancha deposits are based on the most up to date geological interpretations and geochemical results from the drilling data currently available. Multi pass ordinary kriging interpolation setup was used to interpolate the grades in the block model while honouring the geology.

Between July 2017 and October 2020, a reconciliation between the reserve model and the reported production from the Constancia mine as credited by the mill showed that tonnes, grade and quantity of copper could all be reproduced within less than 3%.

The component of the mineralization within the block model that meets the requirements for reasonable prospects of economic extraction was based on the application of a Lerchs-Grossman cone pit algorithm.

The mine production plan contains 569.4 million tonnes of waste and 532.5 million tonnes of ore, yielding a waste to ore stripping ratio of 1.1. An average life of mine mining rate of 77 million tonnes per annum, with a maximum of 81.0 million tonnes per annum through the first 13 years, will be required to provide the assumed nominal process feed rate of approximately 31.3 million tonnes per annum. The ore production schedule for the life of mine shows average grades of 0.31% Cu, 89 g/t Mo, 0.07 g/t Au and 3.0 g/t Ag.

Reconciliation of Reserves and Resources

A year over year reconciliation of the estimated mineral reserves and resources at the Constancia mine is set out below. Changes to the resource model and mine plan for the Constancia mine are mostly related to the integration of the exploration successes at Constancia North and the correction of an under-estimation bias in gold grade in the database partially offset by the 2020 mining depletion.

A significant increase in copper and gold grade in the current mineral resource estimates is mostly due to the addition of Constancia North combined with the new geological interpretation and a change in resource reporting, i.e. using the same cut-off grade as for reserves and removing low grade inferred tonnage outside of the porphyry in host rocks with poor prospects for economic extraction

There have been no changes to the Pampacancha resource model and mine plan and the current mineral reserves and resources remain the same as the prior year. As a result, a detailed reconciliation has been omitted.

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Constancia

Notes:

1.Totals may not add up correctly due to rounding.

2.Re-evaluation of economic viability.

3.Mineral resources are exclusive of mineral reserves and do not have demonstrated economic viability.

4.Metal prices of $3.10 per pound copper, $11.00 per pound molybdenum, $1,500 per ounce gold, and $18.00 per ounce silver with an exchange rate of 1.30 C$/US$ were used to estimate mineral reserves and resources.

5.Constancia mineral reserves and resources are estimated using a minimum NSR cut-off of US$6.14 per tonne.

6.Metallurgical recoveries are applied by ore type and assumed to be 85.8% on average for the life of mine.

Mining Operations

The Constancia mine is a traditional open pit shovel/truck operation with two deposits: Constancia and Pampacancha. The operation consists of an open pit mining and flotation of sulphide minerals to produce commercial grade concentrates of copper and molybdenum. Silver and a small quantity of payable gold reports to the copper concentrate. The Pampacancha deposit exhibits higher grades of copper and gold and is scheduled for start of mining activities in second quarter of 2021.

To match the production requirements, operations are conducted from 15 metre high benches using large-scale mine equipment, including: 10-5/8-inch-diameter rotary blast hole drills, 27 cubic metre class hydraulic shovels, 19 cubic metre front-end loaders, and 240 ton off-highway haul trucks.

Processing and Recovery Operations

In 2020, the processing plant achieved its nominal throughput capacity of 90,000 tonnes per day of ore (31 million tonnes per annum at 94% plant availability), although the actual amount of ore milled during the year was affected by the eight week government-mandated shutdown.

The primary crusher, belt conveyors, thickeners, tanks, flotation cells, mills and various other types of equipment are located outdoors and are not protected by buildings or enclosures. To facilitate the appropriate level of operation and maintenance, the molybdenum concentrate bagging plant, copper concentrate filters and concentrate storage are housed in clad structural steel buildings.

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The processing plant has been laid out in accordance with established good engineering practice for traditional grinding and flotation plants. The major objective is to make the best possible use of the natural ground contours by using gravity flows to minimize pumping requirements and to reduce the height of steel structures.

An instrumentation plan has enhanced the processing plant's performance with various initiatives implemented at different sub-process levels. These initiatives include video cameras at the apron feeder and belts, froth cameras at the flotation cells and a particle-size analyzer, all of which have been installed and commissioned. These initiatives were part of an overall automation plan integrated into the processing plant system.

Capital and Operating Costs

The life of mine sustaining capital expenditures for Constancia and Pampacancha are estimated to be $898 million (excluding capitalized stripping).

The total sustaining capital expenditures include capital required for major mining equipment acquisition, rebuilds, and major repair. The cost also includes site infrastructure expansion (Tailings Management Facility, Waste Rock Facility, etc.) and process plant infrastructure.

In addition, capitalized stripping totals $350 million for the mine life duration and $51 million of capitalized growth projects including the initial development of the Pampacancha deposit (other than the cost of any additional land user agreements) as well as several projects at the mine and the process plant.

The LOM operating costs are set out in the Constancia Technical Report and our projected unit operating costs for 2021 are set out in our February 18, 2021 press release.

The information presented in this section is forward looking information. See "Cautionary Statement on Forward-Looking Information" and "Risks and Uncertainties" in this AIF.

Exploration, Development and Production

The Constancia mine commenced initial production in the fourth quarter of 2014 and achieved commercial production in the second quarter of 2015. Pampacancha is expected to be developed and mined commencing in the second quarter of 2021.

In addition, as described in the AIF, we recently acquired a large, contiguous block of mineral rights to explore for mineable deposits within trucking distance of the Constancia processing facility. While drilling has commenced on the Quehuincha target, community agreements and permits will be required to commence exploration activities on the other lands.

LALOR AND OTHER SNOW LAKE ASSETS

Project Description and Location

Lalor is a gold, zinc and copper mine near the town of Snow Lake in the province of Manitoba. Lalor is located approximately 200 kilometres mostly by paved highway east of Flin Flon, Manitoba. Lalor commenced initial ore production from the ventilation shaft in August 2012 and commenced commercial production from the main shaft in the second half of 2014.

The town of Snow Lake is a full-service community with available housing, hospital, police, fire department, potable water system, restaurants and stores. To house non-local employees during their work rotations, the company provides a camp located in town which services Hudbay employees and contractors for the mine and mill operations. Other infrastructure in the area includes provincial roads, a 115 kV Manitoba Hydro power grid within four kilometres of Lalor and Manitoba Telecom land line and cellular phone service.

Hudbay also operates a concentrator in the Snow Lake area: the Stall mill located approximately 16 km from Lalor. The New Britannia gold mill is located approximately 16 km east of the Lalor mine and it is currently being refurbished. Hudbay plans to complete the refurbishment, commissioning and ramp-up of the New Britannia mill in the second half of 2021, adding a new copper flotation circuit with a nominal throughput capacity of 1,500tpd.

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Hudbay also operates a zinc metallurgical plant in Flin Flon with a capacity of 115,000 tonnes per annum of refined zinc. However, Hudbay intends to cease production activities in Flin Flon once the 777 mine reserved are depleted in the second quarter of 2022. The Flin Flon mill, tailings facility and power house will be placed on care and maintenance. 777 mine, the Zinc plant and the oxygen plant are slated for permanent closure. Some administrative functions and care and maintenance activities will continue in Flin Flon. Concentrate handling and the fabrication shops, located in Flin Flon will also continue to support the Snow Lake operations. After the zinc plant closure, the zinc concentrates produced from the Stall mill will be sold to market.

In February 2019, Hudbay announced the discovery of the 1901 deposit located less than 1,000 metres from the existing ramp between the former Chisel mine and Lalor and benefiting from the proximity of existing infrastructure. In 2020, Hudbay conducted infill drilling, metallurgical testing and a pre-feasibility study that confirmed the technical and economic viability of the indicated and measured portion of the mineral resource estimates at 1901.

The WIM deposit was acquired by Hudbay in the third quarter of 2018 for approximately C$0.5 million. WIM is a copper-gold deposit that starts from surface and is located approximately 15 kilometres by road north of the New Britannia mill. Access is currently via a winter road, and so a year-round gravel road is required for accessing WIM from New Britannia. Powerlines along the access road will also be required to feed the underground electrical distribution system.

The New Britannia mine is a former producing gold mine that produced approximately 600,000 ounces between 1949 and 1958 and an additional 800,000 ounces between 1995 and 2005. Significant mineral resources remain accessible at New Britannia as well as in the nearby Birch and 3 Zone with some investment in the existing mining infrastructure, such as rehabilitating the existing portal and ramp development at 3 Zone.

3 Zone is currently accessible via road and located approximately 3 kilometres (by road) northwest of New Britannia mill. Like WIM, 3 Zone requires powerlines along the access road, and year-round maintenance to the access road to site. Other surface infrastructure needed to support mining activities at WIM and 3 Zone include maintenance and warehouse facilities, fuel farms and storage tanks, and a mine safety and crew lineup space and changehouse. It is envisaged that main administration offices will be centralized at either New Britannia mill or Lalor mine site.

Pen II is a low tonnage and high-grade zinc deposit that starts from surface and is located approximately 6 kilometres by road from the Lalor mine. Access is currently via winter road, with potential for an all-weather road to be established north of Lalor mine around Lalor Lake and to the Pen II site.

The Watts deposit is located approximately 100 kilometres by road from the Stall mill and is near existing Manitoba Hydro powerlines. It is between 50 and 900 metres below surface, and in 2019 Hudbay conducted a limited drill program which has successfully extended known high grade copper mineralization along the strike of the ore body.

For all the properties mentioned above, Hudbay owns a 100% interest and there are no royalties payable other than those potentially payable to the province. Surface rights are held under general permits and are sufficient for purposes of our development plans.

In 2020, Hudbay exercised its buy back right to regain 51% ownership of the Talbot deposit that had been optioned to Rockcliff Metals Corp. ("Rockcliff") in 2014. The Talbot deposit is located approximately 200km southeast of the Stall and New Britannia mills. Rockcliff conducted several drilling campaigns between 2014 and 2019 that led to the declaration by Rockcliff of a NI 43-101 indicated mineral resource estimate of 2.2 million tonnes at 2.3% Cu, 2.1 g/t Au, 1.8% Zn, 36 g/t Ag and inferred mineral resource of 2.4 million tonnes at 1.1% Cu, 1.9 g/t Au, 1.7% Zn, 25.8 g/t Ag. Hudbay has the right to extend its ownership to 65% by incurring expenses related to the development of the project and for the purpose of this report relies on the mineral resource estimates reported by Rockcliff.

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Accessibility, Climate, Local Resources, Infrastructure and Physiography

At Lalor, the current project infrastructure includes a 3.5 kilometre main access road that was constructed in 2010 from provincial road 395 and provides access from the Chisel North mine site to the Lalor site. This access road includes a corridor with freshwater/discharge pipelines, tailings/discharge pipelines for the Paste Plant and a main hydro line. Access to the site is off paved provincial highway 392, which joins the town of Snow Lake and provincial highway 39 and provides access to Flin Flon.

The Snow Lake area has a typical mid-continental climate, with short summers and long, cold winters. Climate generally has only a minor effect on local exploration and mining activities. The project area is approximately 300 metres above sea level, consisting of ridged to hummocky sloping rocks with depressional lowlands, and has gentle relief that rarely exceeds 10 metres. The area of Lalor and surrounding water bodies (Snow, File, Woosey, Anderson and Wekusko lakes) are located in the Churchill River Upland Ecoregion in the Wekusko Ecodistrict.

We commissioned a 2,000 US gallon per minute water treatment plant in 2008 at Chisel Lake, approximately eight kilometres from Lalor, where water from the Lalor mine is treated in the Water Treatment Plant along with water from the Chisel Open Pit.

Tailings production associated with the Lalor mine is impounded in the Anderson Tailings Impoundment Area ("TIA") and a capacity expansion has been approved to accommodate our planned future operations.

Power for the site is being transmitted at 25 kV from the Lalor substation located at the Chisel North minesite via a 3.5 kilometre transmission line.

History

The Snow Lake area has a long exploration and mining history. Exploration in the Lalor-Chisel area has been occurring since the 1950s and the Chisel Basin area has hosted four past producing mines. This basin is also the host of the Lalor deposit. Lalor commenced initial ore production from the ventilation shaft in August 2012, only five years after its initial discovery hole and achieved commercial production from the main shaft in the third quarter of 2014. Since 2012, the mine has produced 8.8 million tonnes.

Gold was first discovered in 1914 approximately 20 kilometres to the southeast of Snow Lake and in 1917, the Moose Horn-Ballast claims produced the first gold in Manitoba. First mine construction at the New Britannia site started in 1945 and in March 1949, the mine was opened as the Nor-Acme mine. Production continued until 1958. 4.9 million tonnes were mined at an average grade of 4.4 g/t and Nor-Acme mill recovered approximately 610,000 ounces of gold during this production period. TVX and High River formed a joint venture to reopen the mine and TVX became the operator. Full production from the main shaft was achieved in August 1996. Through various transactions, Kinross became the operator of the New Britannia mine-mill complex. Production ceased at the end of September 2004 and the mill was put on care and maintenance in 2005 due to a low gold price environment after producing 1.6 million ounces of gold.

GeologicalSetting

The Snow Lake deposits including Lalor are all located within the Trans-Hudson Orogen of the Flin Flon Greenstone Belt. The volcanic assemblages consist of mafic to felsic volcanic rocks with intercalated volcanogenic sedimentary rocks.

The volcanogenic massive sulphide (VMS) deposits located near the town of Snow Lake have been subdivided into two different groups: Cu-Zn-rich (Cu-Zn, Cu-Zn-Au) and Zn-Cu-rich (Zn-Pb-Cu-Ag) types. The Cu-Zn-rich deposits mainly occur in the Anderson sequence and the Zn-Cu-rich deposits occur in the Chisel sequence. The Watts and Talbot deposits, located east-southeast of the town of Snow Lake lies in the eastern portion of the Flin Flon-Snow Lake Greenstone belt and is a stratabound accumulation of sulphides that precipitated in a depositional environment similar to the base metal deposits of the Snow Lake mining camp.

Mineralization of the lode-gold vein-type deposits are hosted in the Amisk group mafic and felsics volcanic rocks which are structurally controlled and associated with shear zones, faults, fold hinges and axial planes that host simple to complex vein systems. The mineralization is associated with lithological contacts of contrasting properties in the sequence of interlayered volcanic and volcaniclastic rocks.

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Drilling

At Lalor, over 3,300 drill holes totaling more than 580,000 m were included in the Lalor database to support the mineral resource and mineral reserve estimates.

Drilling supporting the 1901, Watts, Pen II and Wim mineral resource and mineral reserve estimates totals respectively 51,000m, 25,000m, 2,000 m and 43,000 m.

For the New Britannia resource estimates including the 3 Zone and Birch zones, over 730,000 m of drilling completed after 1995 were used. Drilling at all properties is a combination of NQ and BQ diamond drill holes, surveyed with either Reflex downhole tools or Gyro for deeper/longer holes.

Mineralization

The Lalor deposit and its associated 1901 satellite zone are interpreted as a gold enriched volcanogenic massive sulphide ("VMS") deposit that precipitated at or near the seafloor in association with contemporaneous volcanism, forming a stratabound accumulation of sulphide minerals. The depositional environment for the mineralization is similar to that of present and past producing base metal deposits in felsic to mafic volcanic and volcaniclastic rocks in the Snow Lake mining camp. The deposit appears to have an extensive associated hydrothermal alteration pipe.

The Lalor VMS deposit is isoclinaly folded and flat lying, with zinc mineralization beginning at approximately 600 metres from surface and extending to a depth of approximately 1,400 metres. The mineralization trends about 320° to 340° azimuth and dips between 30° and 45° to the northeast. It has a lateral extent of about 1,400 metres in the north-south direction and 780 metres in the east-west direction. Sulphide mineralization is pyrite, sphalerite and chalcopyrite. The current interpretation suggests the deeper copper-gold lens tends to have a much more linear trend to the north than the rest of the zones. Gold and silver enriched zones occur near the margins of the sulphide lenses and in local silicified footwall alterations. These silicified areas often correlate with disseminated stringer chalcopyrite, pyrrhotite and pyrite, whether together or independent of each other. This footwall gold mineralization is typical of VMS footwall feeder zones with copper-rich disseminated and vein style mineralization overlain by massive zinc-rich zones. The gold bearing lithologies remain open down plunge to the north and northeast.

The WIM deposit comprises a stratabound, semi-massive to massive sulphide lens with an adjacent stringer/disseminated sulphide zone. Mineralization is characterized by disseminated to massive, recrystallized and medium to coarse grained pyrite, pyrrhotite, chalcopyrite and minor sphalerite. The VMS mineralization extends from surface to 720 m below surface with a strike length of 725 m with an average thickness of 10 m. The WIM deposit is conformable to stratigraphy, trends to the northwest at a N310º azimuth, a 40-45º dip towards the northeast and a plunge of 40º to the north.

The Snow Lake Gold Properties including No. 3 and Birch zones belong to the quartz-carbonate vein gold subtype of orogenic lode gold deposits. This subtype of gold deposits consists of simple to complex quartz carbonate vein systems associated with brittle-ductile rock behaviour, corresponding to intermediate depths within the crust, and compressive tectonic settings.

At Watts, sulphide intersections can be up to 23m in core length, with a lateral extent of approximately 1,200m. Diamond drilling has intersected mineralization at depths of 850m below surface. Mineralization was intersected and interpreted as three lenses; Main Lens, Main Footwall Lens, and East Lens comprised of coarse-grained pyrite, pyrrhotite, chalcopyrite, sphalerite, and minor galena. The sulphides have generally been recrystallized to a coarse grain size, but sections of finer grained sulphides do occur.

The Pen II deposit comprises a stratabound, semi-massive to massive sulphide lens with an adjacent stringer/disseminated sulphide zone. Mineralization is characterized by disseminated to massive, recrystallized and medium to coarse-grained sphalerite, pyrite, pyrrhotite and minor chalcopyrite. The mineralization extends from surface to 500 m below surface. The current strike length of the deposit is 400 m with an average thickness of 4 m. The deposit is conformable to stratigraphy, trends to the northeast at a N40º azimuth, a 45-65º dip towards the northwest.

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SamplingMethods

As per Hudbay's standard procedures in Snow lake, drill core is logged, sample intervals selected and marked clearly on the core. The majority of exploration core is cut in half with a diamond saw and a representative portion of the hole is kept. Definition and delineation core is whole core sampled. All samples are placed in a plastic bag with its unique sample identification tag. The average length for the sample intervals is 0.9 metres. The core was photographed before samples were split and bagged for shipment before dispatch to the laboratories.

Sampling and Analysis

Sample preparation has been conducted at three different laboratories over time. Prior to 2016, a total of 160,804 drill core samples were analyzed at the Hudbay laboratory in Flin Flon. Copper, zinc, and silver were digested in aqua regia and analyzed by ICP-OES. Gold was determined by lead-collection fire assay fusion, for total sample decomposition, followed by atomic absorption spectroscopy (AAS) analysis. Fire assays were performed on 15 to 30g subsample pulps to avoid problems due to potential nuggetty gold. All samples with gold values (AAS) > 10 g/t were re-assayed using a gravimetric finish.

Since September 2016, nearly all samples are prepared and assayed at Bureau Veritas in Vancouver. All drill core samples have been sent for analysis at Bureau Veritas while the SGS laboratory in Vancouver was used as the umpire laboratory for quality control purposes. Copper, zinc and silver were digested in aqua regia and analyzed by inductively coupled plasma optical emission spectrometry (ICP-OES) and more recently in 2016 by inductively coupled plasma mass spectrometry (ICP-MS). Samples with copper and zinc over the upper limit of detection (ULD) were analyzed by titration, whereas those samples with silver values over the ULD were analyzed by fire assay and gravimetric finish. Gold was determined by fire assay followed by atomic absorption spectroscopy (AAS).

The sampling methodology, analyses and security measures used by the previous owners at New Britannia have been documented in the Technical Report produced by Genivar for Alexis Resources in 2011 and available on SEDAR. Most of the drill cores and chips assays from 1995 to 2003 from the New Britannia mine were completed at the on-site mill laboratory using a fire assay/atomic absorption finish (FA/AA) method. Standard, blank and duplicate assay samples were added to each batch of 21 samples for drill core and to each batch of 24 samples for chip samples. The sampling and analytical procedures conformed to the industry standards at the time, and these were adequate to ensure a representative determination for the type of gold mineralization identified on the property. In 2019, 6 holes drilled by Hudbay at 3 Zone confirmed previous drilling results.

As of January 1, 2021, a total of 84,476 density measurements were collected by Hudbay. These measurements were performed at the Flin Flon laboratory, Bureau Veritas laboratory or at Hudbay logging facility, using a non-wax-sealed immersion technique to measure the weight of each sample in air and in water and pycnometry methods.

QualityAssuranceandQualityControl

QAQC samples were inserted into the sample stream. Hudbay's practice involves insertion of the following every 100 samples, 5 blanks, 5 duplicates, 5 base metal standards and 2 gold standards.

Results from the QA/QC program for standards, blanks, duplicates and external checks show that the program has been working effectively for the Lalor, 1901, Watts, Pen II and Wim properties, meeting industry standards and the data used provides a representative and unbiased basis for resource modeling purposes.

Security of Samples

Security measures taken to ensure the validity and integrity of the samples collected consist of a chain of custody of drill core from the drill site to the core logging area. All facilities used for core logging and sampling are located on the mine site and all sample splitting and shipping activities are conducted by technicians under the supervision of Hudbay geologists. The samples results are stored on a secure mainframe based Laboratory Information Management System (LIMS). The diamond drill hole database is stored on the secure Hudbay network, using the acQuire database management system with strict access rights.

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Mineral Processing and Metallurgical Testing

The Stall concentrator is an operating plant running at steady state and, as a result, several of the initial metallurgical test results and assumptions have been revised to reflect the operating experience and performance of the plant over the past six years of operation in processing the ore produced from the Lalor mine. The Stall concentrator is producing a copper concentrate grade of 18 to 20% copper at 83 to 85% recovery and a zinc concentrate grade of 51% zinc at 90 to 93% recovery. 55 to 62% of the gold and silver are recovered in the copper concentrate as co-products. Over the life of the Lalor mine, copper, gold and silver grade will increase and the average zinc grade will decrease. This trend will partially be offset in 2026, when the 1901 deposit enters production to feed Stall with zinc rich mineralization.

Extensive metallurgical testing was conducted in 2019 and 2020 to demonstrate the technical viability and economic benefits of some changes to the process flowsheet of the Stall mill to improve metal recoveries and/or concentrate grade from historical performance. The main changes to the flowsheet planned to be implemented by the end of 2022 include the addition of Jameson cells to increase copper rougher and cleaner capacity, the addition of a talc preflotation circuit, an increase in the zinc circuit cleaning capacity and froth washing and an increase in recovery of free gold through the addition of a Knelson gravity concentrator on the copper regrind cyclone underflow. In addition, further testwork is underway to include a lead recovery stage into the sequential flotation circuit. Although the benefits of this addition have not yet been incorporated into the present life of mine plan, Hudbay anticipates a short payback on this additional limited investment at Stall.

The comparison of the current and forecasted recovery and product grades increase as per the upgraded flowsheet are summarized in the table below.

The Stall Recovery Improvement Project feasibility study was completed in 2020 by Ausenco with a Class 3 capital estimation of CAD$24.5M excluding tax. The project is scheduled to progress through detailed engineering in 2021 and construction in 2022, following the completion of the New Britannia Project. Completion and operation of the Stall Recovery Improvement Project is scheduled for Q1 2023.

In 2020 a metallurgical testwork program was conducted by Blue Coast Research to cover composites representing low grade, medium grade and high grade of the two zinc rich lenses of the 1901 deposit. A subsample of each of the composite samples was ground to a p80 of 100µm and submitted for mineralogical analysis. Mineralogical analysis, flotation tests and were completed on each of the six composites and confirmed that the metallurgical performance of the Stall concentrator for the Lalor base metal lenses was applicable to the 1901 deposit, including the potential benefit of a lead recovery stage in the flotation circuit.

The Snow Lake operations life of mine plan includes the processing of gold ore at the company's New Britannia mill starting in H2 2021. As described in this AIF, Hudbay is well advance in refurbishing the New Britannia mill, including the addition of a copper flotation circuit, to optimize processing of the Lalor gold and copper gold ores. To establish the future performance of the New Britannia mill, two major metallurgical test work programs were undertaken between 2015 and 2020 by SGS Lakefield and Blue Coast Research. All sample composites were submitted for mineralogical analysis by QEMSCAN to identify minerals and their liberation as well as for Bond rod and Bond ball mill work tests, gravity concentration test, rougher and cleaner flotation tests, cyanidation tests, and rolling bottle leach tests. In addition, CIP modelling was completed to predict the gold extraction performance of a CIP or CIL circuit. Cyanide destruction tests using the SO2/Air process were also carried out following standard SGS procedure of completing batch tests first to confirm applicability and to optimize retention times and reagent requirements. These results were confirmed and further refined in 2019-2020 at Blue Coast Research facilities.

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Metallurgical testwork conducted in 2019 on WIM and 3 zone has confirmed that this mineralization is also amenable to successful beneficiation at the New Britannia mill. Four composites were created for each deposit and submitted for mineralogical, comminution and flotation as well as leach test work and gravity concentration in the case of 3 Zone. These tests have been used to confirm the copper, gold and silver recoveries applied in the life of mine plan for these two satellite deposits.

Mineral Resource Estimates

The mineral resource and mineral reserve estimates for Lalor mine and all Snow Lake deposits are effective January 1, 2021. Other than as disclosed in this AIF, there are no known metallurgical, environmental, permitting, legal, taxation, socio-economic, marketing or political issues that could reasonably be expected to materially impact the mineral resource and mineral reserve estimates.

The mineral resources for Lalor, 1901, Watts, WIM, 3 Zone and Pen II are estimated either as base metal lenses or gold zones and classified as Measured, Indicated and Inferred resources, as described in the most recent technical report.

The construction of the mineralized envelopes was based on the type of mineralization intersected.

The resource is based on integrated geological and assay interpretation of information recorded from diamond drill core logging and assaying and underground mapping and is comprised of the following steps: exploratory data analysis, high-grade capping (when required), and estimation and interpolation parameters consistent with industry standards.

The block models were updated using both infill and exploration drilling conducted up until September 2020 using the methodology documented in the March 2021 Lalor and Snow Lake Operations Technical Report and validated to ensure appropriate honouring of the input data by the following methods:

• Visual inspection of the ordinary kriging ("OK") block model grades in plan and section views in comparison to composites grade;
• Comparison between the nearest neighbour and the OK methods to confirm the absence of global bias in the model; and
• Smoothing correction to remove the smoothing effect of the grade interpolation where necessary.

Hudbay uses a stringent approach to establish the potential for economic extraction of its resource reporting for underground deposits. With this approach, the potential for economic extraction of the mineral resource estimates are reported within the constraint of a 'stope optimization envelope'. This excludes small isolated individual blocks above the economic cut-off criteria from the resource estimate and includes some 'geological dilution' that would need to be included in the economic envelope to maintain minimum spatial continuity requirements to define mineable shapes.

The parameters used as input to define the stope optimization envelope cover all the relevant technical and economic constraints including minimum stope and waste pillar dimensions and a NSR value calculation for each block based on anticipated metal recoveries, long-term metal price forecast and operating and capital costs based on the 2021 Lalor mine and Stall concentrator budgets. Two NSR values are calculated for each block to assess and compare the value of the blocks going to the Stall mill (no material difference between the two) or going to the new Britannia mill. The mineral resource estimates are reported to ensure that each potential stope would cover all its associated operating mining and milling costs.

For the former New Britannia, mine and its satellite gold deposits, the historical resource estimate performed by Kinross and by Alexis Minerals followed a conventional and industry standard approach and have been independently validated in 2018 by WSP Engineering ("WSP"). The cut-off grades for the resource have been estimated over a 6-ft. minimum true width with a variable cut-off by zone as summarized in 1-6. The variation in the cut-off grade is related to new mining versus remnant mining.  Given that WSP had to rely on historical documentation for some of the technical information supporting the estimation of the mineral resource estimates, the tonnes and grades previously estimated by Kinross and Alexis Minerals as measured and indicated resources were downgraded to an inferred category. Mineral resources that are not mineral reserves do not have demonstrated economic viability.

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Mineral Reserve Estimates

The current mineral reserves were estimated based on a life of mine ("LOM") plan prepared using Deswik mine design software that generated mining inventory based on stope geometry parameters and mine development sequences. Appropriate dilution and recovery factors were applied based on cut and fill and longhole open stoping mining methods with a combination of paste and unconsolidated waste backfill material.

The following steps were followed in developing the reserve estimates at Lalor, 1901, WIM and 3 Zone:

• Calculate two payable (NSR) values for each individual block in the resource model depending on whether processing would occur at the Stall concentrator or at the New Britannia concentrator, using long-term metal prices, concentrator recoveries, metal payability and downstream smelter treatment and refining costs assumptions.
• Design stopes in the Deswik Stope Optimizer, considering depleted mineral resources, existing workings, resource categories and mine and mill operations costs. Dilution and recovery are estimated and applied at this step. Stopes are designed for both the Stall concentrator option and the New Britannia concentrator option.
• Considering grades, value and location in the mine, assign stopes to either Stall or New Britannia concentrator.
• Establish stope economics using a secondary NSR calculation where, along with mine and mill operations costs, mine capital, waste development and offsite administration costs are applied to each stope.
• Assign whether stopes can be upgraded to mineral reserves based on resource classification.
• Design ore development required for mining the reserves. Deplete development from the stopes. Interrogate grades of designed development for inclusion in mineral reserves. Sequence and schedule development and stope production for input to a financial Life of Mine (LOM) study to support mineral reserve economics.

The above methodology takes into consideration the different ore types and the milling options for the mine's future production and considers the various ore types found at these deposits.

The mineral reserve estimates exclude the mined out mineral resources, non-recoverable pillars (rib, post and sill) within mined out areas, mineral resources that are sterilized or not recoverable due to previous mining and stopes based on inferred mineral resource estimates.

Reconciliation of Reserves and Resources

Other than as disclosed in this AIF, there are no known metallurgical, environmental, permitting, legal, taxation, socio-economic, marketing or political issues that could reasonably be expected to materially impact the mineral resource and mineral reserve estimates.

A year over year reconciliation of our estimated mineral reserves and resources at the Lalor mine and 1901 deposit combined is set out below and shows that resource to reserve conversion have more than offset 2020 mining depletion with a net gain on tonnes and for all metals including an additional 226 koz of gold contained in reserves.

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Notes:

1.Totals may not add up correctly due to rounding.

2.Mineral resources that are not mineral reserves do not have demonstrated economic viability.

3.Mineral resources in the above tables do not include mining dilution or recovery factors.

4.Metal prices of $1.10 per pound zinc, $1,500 per ounce gold, $3.10 per pound copper, and $18.00 per ounce silver with an exchange rate of 1.30 C$/US$ were used to estimate mineral reserves and resources.

5.1901 mineral reserves and resources were initially estimated using metal price assumptions that vary marginally over the assumptions stated. In the Qualified Person's opinion, the combined impact of these small variations does not have any impact on the mineral resource estimates.

6.Lalor mineral reserves and resources are estimated using a minimum NSR cut-off of C$105 per tonne for waste filled mining areas and a minimum of C$116 per tonne for paste filled mining areas.

7.1901 mineral reserves and resources are estimated using a minimum NSR cut-off of C$140 per tonne.

8.For Lalor, individual stope gold grades were capped at 10 g/t, as a prudent estimate until reserves to mill reconciliations can establish that the high-grade gold can indeed be entirely recovered. This capping method resulted in the reduction of the global gold reserve grade by approximately 3%.

9.Base metal mineral resources are estimated based on the assumption that they would be processed at the Stall concentrator while gold mineral resources are estimated based on the assumption that they would be processed at the New Britannia concentrator, which is currently being refurbished.

Stall recoveries improvement drives a larger contribution of the precious metals in the base metal inferred resources while the global increase in inferred resources is driven by gold zones with a net addition of circa 350koz of contained gold.

The mineral reserve estimates for WIM and 3 Zone presented in this AIF remain unchanged from the prior year and are effective January 1, 2021. As a result, a detailed reconciliation has been omitted. 

No mineral reserve estimates are reported for the Pen II, Watts, and New Britannia Mine deposits due to insufficient drilling coverage. The Talbot mineral resource estimates are included on the following table on a 100% basis based on Rockcliff's reported estimates in compliance with NI 43-101. The only change to the year over year estimate of the base metal mineral resources results from the addition of the Talbot mineral resource estimates. The gold mineral resources at Birch and New Britannia have not changed year over year. As a result, a detailed reconciliation of the gold inferred mineral resources at Birch and New Britannia has been omitted.

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Notes:

1.Totals may not add up correctly due to rounding.

2.Mineral resources that are not mineral reserves do not have demonstrated economic viability.

3.Mineral resources in the above tables do not include mining dilution or recovery factors.

4.Watts and PEN II mineral resources were initially estimated using metal price assumptions that vary marginally over the assumptions used for Lalor. In the Qualified Person's opinion, the combined impact of these small variations does not have any impact on the mineral resource estimates.

5. Watts mineral resources are estimated using a minimum NSR cut-off of C$150 per tonne, assuming processing recoveries of 90% for copper, 80% for zinc, 70% for gold and 70% for silver.

6. Pen II mineral resources are estimated using a minimum NSR cut-off of C$75 per tonne.

7.Base metal mineral resources are estimated based on the assumption that they would be processed at the Stall concentrator.

8. The above resource estimates table includes 100% of the Talbot mineral resources reported by Rockcliff Metals Corp. in its 2020 NI 43-101 technical report published on SEDAR. Hudbay currently owns a 51% interest in the Talbot project.

Mining Operations: Mine Planning

Lalor mine is a multi-lens, flat lying orebody with ramp access from surface and shaft access to the 955 metre level. Internal ramps located in the footwall of the orebody provide access between mining levels, with the mine currently developed to the 1160 meter level in the Copper Gold lens 27. Stopes are accessed by cross cuts from the major mining levels.

Power is provided to the mine via power cables located in the production shaft. The Chisel North mine ventilation system in sequence with the Lalor mine Downcast Raise, the Access Ramp and the Lalor mine Production Shaft provide a total of 955,000 cfm for ventilation purposes. Mine ventilation air is heated by direct fired propane heaters located at each of the intakes. Lalor mine's fresh water source is Chisel Lake. Mine water reports to the water treatment plant at Chisel Lake where it is treated and released. All water within the mine is collected in intermediary collection sumps and proceeds to the main collection areas via drain lines, drain holes or drainage ditches.

In 2020, we mined 1,631,000 tonnes of ore via the production shaft, while 23,000 tonnes of ore were trucked to surface from the ramp. Once it reached surface, the ore was trucked to the Stall concentrator and Flin Flon concentrator for processing.

Mining is done using mobile rubber tired diesel equipment. Load haul dump ("LHD") units vary from 8 to 10 cubic yards. Trucks are currently 42 to 65 tonne units that haul both ore and waste. Autonomous operation of a LHD loader underground is also completed from surface by tele-remote monitoring. Ore is directed to rock breakers located near the production shaft at the 910 metre level, where it is sized to 0.55 metre and conveyed to the shaft for hoisting to surface by two 16 tonne capacity bottom dump skips in balance. Hoisted ore is hauled by truck to the Chisel North mine site, crushed to less than 0.15 metre and stockpiled. Crushed ore is loaded by front end loader to tractor trailers and hauled to Hudbay concentrators. Waste rock is disposed of as backfill underground.

Lateral advance is made in 4 m long segments (rounds), with typical dimensions of 6 metre wide by 5 metre high. Lateral drilling is completed with two boom electric hydraulic jumbo drills, each round requires approximately 80 holes. Following mucking, standard ground support is installed. Mine services, including compressed air, process water and discharge water pipes, paste backfill pipeline, power cables, leaky feeder communications antenna and ventilation duct are installed in main levels and stope entrances.

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Two main mining methods are used at Lalor mine, cut and fill and longhole open stoping. Cut and fill methods include: mechanized cut and fill, post pillar cut and fill and drift and fill. Longhole open stoping methods include: transverse, longitudinal retreat and uppers retreat. Each mining area is evaluated to determine the most economic stoping method. In general where the dip exceeds 35° and the orebody is of sufficient thickness, longhole open stoping is used and lateral cut and fill mining methods are used in flatter areas. Approximately 80% of the mineral reserves are mined using the longhole open stoping methods, 12% through the cut and fill methods and 8% via development in ore. All stope mining is done using emulsion explosives.

Production rates have consistently achieved and sustained 4,500 tonnes per day in 2020 but ramped to a maximum of 5,300 tonnes per day during a shaft incident at our 777 mine for a period of 6 weeks after some of the workforce and equipment had been transferred temporarily to Lalor mine. The production is supported by a hoisting plant capable of 6,000 tpd, transitioning to more bulk mining methods with additional mining fronts and design changes to improve mining efficiencies, developing ore passes and transfer raises to reduce truck haulage cycle times from the upper portions of the mine and a paste backfill plant commissioned in 2018.

Ore is received at the Stall concentrator, approximately 16 kilometres east of Lalor mine, and placed in coarse ore bins or on a stockpile at the mill. Ore is conveyed to a three stage crushing plant and crushed to 19mm. Crushed ore is conveyed to two sequential rod and ball mill combinations operating parallel with each other. The mills feed a sequential flotation process where a bulk rougher copper concentrate is floated first. The copper rougher concentrate is reground, followed by three stages of cleaning producing a concentrate grading approximately 21% copper. The copper concentrate is thickened and filtered to remove water, and is conveyed to concentrate storage. Copper concentrate is loaded to semi tractor trailer trucks for transport to Flin Flon for transport by rail to third party smelters.

The tails from the copper circuit feed the zinc flotation circuit which produces a zinc rougher concentrate. This is followed by three stages of zinc cleaning which produces a concentrate grading approximately 51% zinc. Zinc concentrate is thickened and filtered and is conveyed to concentrate storage. Zinc concentrate is loaded to semi tractor trailer trucks for transport to Flin Flon where it is processed into refined zinc. Final tails from the Stall concentrator are currently pumped to the Anderson Tailings Impoundment Area ("TIA") for permanent disposal.

The paste plant is located northeast of the existing headframe complex at Lalor mine and delivery capacity of the paste can achieve 165 tonnes per hour solids (tails) or 93 cubic metres per hour paste. The paste plant is designed to fill voids left by mining of approximately 4,500 tonnes per day. Taking into account waste generated from development in the LOM and the plan not to hoist waste from underground the combined paste/waste backfilling capacity is approximately 6,000 tonnes per day. The paste plant is capable of varying the binder content in the paste to provide flexibility in the strength gain of the paste where higher and early strength may be required depending on mining method.

Tails required for paste are diverted to the Anderson booster pump station. Capacity of the pumping station range from 110 to 130 tonnes per hour to allow for some variation in the output of tailings from the concentrator. The tailings are directed into the Anderson TIA when not required for the paste plant.

Two pipelines are installed between the Anderson booster pump station and the paste plant located at Lalor mine site, approximately a 13 kilometre distance. Paste is delivered underground via one of two - nominal 8 inch diameter, cased boreholes from surface to the 780 metre level the mine. Only one borehole is required during normal operation, with the second borehole available as a spare in the event of a plug or excessive wear on the primary hole.

A network of underground lateral piping and level to level boreholes transfer the paste from the base of the discharge hopper to the required underground locations.

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Permitting and Environmental

The permits required for the current Lalor operation, including the Lalor mine, Stall concentrator and Anderson tailings facility have all been issued and remain valid.

At this time, there are no known environmental concerns which could adversely affect Hudbay's ability to operate the Lalor mine. Since the mine site is nearby existing facilities in the Snow Lake area, the Lalor mine was able to utilize infrastructure, services, and previously disturbed land associated with permitted, pre-existing and current mining operations in the Snow Lake area. The Lalor mine and associated projects are designed to minimize the potential impact on the surrounding environment by keeping the footprint of the operations as small as possible and by using existing licensed facilities for the withdrawal of water and disposal of wastes.

Initial proposals for baseline work at WIM have been prepared by AECOM. Once complete these environmental studies will form the basis of the required approvals needed to advance this project should it be deemed viable.

3 Zone is part of the New Britannia site. Significant environmental studies of the area are available, and additional environmental assessments would be utilized to augment our understanding of property and any potential offsite impacts. Approvals to advance this project would be through Provincial regulators as part of an alteration of the existing Environment Act Licence for the property.

The 1901 deposit would leverage all existing surface and underground development near Lalor operations. Significant environmental baseline work has recently been conducted by AECOM and in conjunction with the significant amount past studies will be used to gain approvals for this development should it prove viable.

The re-commissioning of the New Britannia concentrator involves the placement of the Lalor gold ore tailings in the fully licensed Anderson tailings facility or the Lalor Paste fill plant via a pipeline connecting Stall concentrator to Lalor Mine. All environmental permits are in place for the refurbishment of the New Britannia mill and associated infrastructure.

Based on Hudbay's long-term (more than 50 years) mining experience in the Snow Lake region, and baseline studies to date, there is no known First Nation or Aboriginal hunting, fishing, trapping or other traditional use of the land in the zone of potential influence for the Lalor mine and associated facilities. Post closure, all water quality and earthen structures will be monitored and inspected in order to ensure the sites' conditions meet the applicable regulatory requirements.

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Capital and Operating Costs

Unit Operating Costs and Cash Costs

Unit Operating Costs		LOM Average
Mining - Lalor	C$/tonne	$107
Mining - 1901	C$/tonne	$87
Mining - WIM	C$/tonne	$75
Mining - 3 Zone	C$/tonne	$70
Milling - Stall	C$/tonne	$27
Milling - New Britannia	C$/tonne	$45
G&A	C$/tonne	$20

Notes:

1.General and Administrative costs relate to shared service costs for Manitoba allocated to Snow Lake operations.

Sustaining and Capital Costs

The capital expenditures required to execute the LOM plan at Lalor (estimated at C$593 million) and 1901 (estimated at C$98 million) includes pre-production mine development for 1901, and the sustaining capital required to continue capitalized mine development activity and to replace/acquire mining equipment. The 1901 mine development plan will start in 2024, followed by ramp-up to the maximum production rate in 2023. Together with Lalor, the 1901 reserves are scheduled to maintain 5,300 tonnes per day of production until 2027. It is also envisaged that additional synergies with Lalor will exist and so reductions in mine equipment costs and personnel requirements are factored into the cost profiles below.

Other capitalized expenditures included in the LOM plan that relate to milling and environmental activities, namely growth projects such as the New Britannia mill refurbishment and the construction of a pipeline corridor to support the planned increase in gold production, as well as the Stall mill enhancement initiatives (discussed under "Mineral Processing and Metallurgy" above).

The New Britannia refurbishment project includes industry standard equipment and proven processing technology in a brownfield environment. Construction activities started in Q1 2020 and are 76% completed as of February 2021. Plant commissioning for the early gold mill is projected for Q2 2021 and Q3 2021 for the flotation plant, ramp up in Q3 2021 for the early mill and Q4 2021 for the flotation plant. The capital expenditure is summarized below (approximately C$90 million of which remained to be spent in 2021).

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Mill Refurbishment	CAD$M
Direct Costs
Procurement	30.2
Site General	9.4
New Flotation Facility	13.5
New Flotation Building	10.8
Mill and Crush Facility	35
Pipeline Corridor	15.9
Town of Snow Lake, Raw Water, Office Upgrades	1.2
Stall Tailings Upgrades	6.5
Subtotal	122.5
Commissioning/OR	5.1
Engineering and Indirect	7.6
Owner Costs, Indirect, First Fills	27.7
Contingency	3
Total Mill Refurbishment	165.9

The information presented in this section is forward looking information. See "Cautionary Statement on Forward-Looking Information" and "Risks and Uncertainties" in this AIF.

Exploration, Development and Production

Since 2014, one exploration drift and one exploration ramp were developed at Lalor for a total of 1,891 metres. The development was undertaken to establish underground platforms to conduct exploration drilling on targets that could not be drilled from existing mine infrastructure.

Since 2017, exploration drilling at Lalor has both focused on adding and converting inferred mineral resource estimates with a strong emphasis on confirming the continuity of the gold mineralization.

Refurbishing the New Britannia mill is expected to significantly increase gold production from Lalor and enable new gold exploration opportunities in the Snow Lake region by having an operating processing facility with substantially higher gold recoveries. New Britannia was placed on care and maintenance in 2005 by its previous owner after producing 1.6 million ounces of gold.

With the inclusion of the New Britannia mill, net revenue at Lalor will shift from primarily zinc to primarily gold, positioning Lalor as a primary gold mine with significant zinc, copper and silver by-products. Once the New Britannia mill is operational, revenue from precious metals through the remaining life-of-mine is expected to be approximately 60% of total revenue. Significant zinc and copper revenue provides diversified commodity exposure.

WIM and 3 Zone mine operations are scheduled for 24 hours per day, 365 days per year, with initial production from WIM scheduled to commence in 2030. A combined mining rate between 1,200 and 1,500 tonnes per day will match the New Britannia mill capacity and will provide an additional 8 year of operating life after the Lalor mine ceases operation. From 2030 to 2037, New Britannia is expected to operate at average feed grades of 2.2 grams per tonne gold and 1.3% copper, as the Lalor feed is replaced by WIM and 3 Zone.

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WIM and 3 Zone Capital and Operating Cost Profiles

The WIM mine development plan contemplates construction activities occurring in 2029, followed by commissioning in 2030 and ramp-up to the maximum production rate by end of 2031. The capital expenditures required for refurbishing the existing mining infrastructures at 3 Zone have been grouped with the WIM sustaining capital expenditure and are estimated to be C$167 million, in aggregate from 2029 to 2037.

WIM and 3 Zone will be traditional long hole underground mining operation with waste backfill and ramp access. Ore from both deposits will be trucked using the same haul road to the New Britannia mill which is located 15 kilometres from WIM and 3 kilometres from 3 Zone. It is envisaged to use some of the spare equipment from Lalor as well as an already existing workforce. Given the short distance to the town of Snow Lake, there will be no need for an additional camp. The estimated operating costs for the WIM and 3 Zone are summarized in the table below.

The information presented in this section is forward looking information. See "Cautionary Statement on Forward-Looking Information" and "Risks and Uncertainties" in this AIF.

ROSEMONT PROJECT

Project Description, Location and Access

The Rosemont project is located on the eastern flanks of the Santa Rita Mountain range approximately 50 kilometres southeast of Tucson, in Pima County, Arizona. Existing graded dirt roads provide good access into and around the Project and connect the property with State Route 83. The city of Tucson, Arizona, provides the nearest major railroad and air transport services to support the Project. The Rosemont project's geographical coordinates are approximately 31º 50'N and 110º 45'W.

The lands are under a combination of private ownership by Rosemont Copper Company, a subsidiary of Hudbay, and Federal ownership. The lands occur within Townships 18 and 19 South, Ranges 15 and 16 East, Gila & Salt River Meridian. The core of the Rosemont project mineral resource is contained within the 132 patented mining claims that in total encompass an area of approximately 2,000 acres (809 hectares). Surrounding the patented claims is a contiguous package of 1,064 unpatented mining claims with an aggregate area of more than 16,000 acres (6,475 hectares). Unpatented claims Agave 7, 8 and 9 and a small fraction named the Recorder Fraction were staked in 2014. Associated with the mining claims are 38 parcels of fee (private) land consisting of approximately 2,300 acres (931 hectares) (the Associated Fee Lands). The area covered by the patented claims, unpatented claims and Associated Fee Lands totals approximately 20,300 acres (8,215 hectares). The patented mining claims are considered to be private lands that provide the owner with both surface and mineral rights. The patented mining claim block, including the core of the mineral resource, is monumented in the field by surveyed brass caps on short pipes cemented into the ground. The fee lands are located by legal description recorded at the Pima County Recorder's Office. The patented claims and Associated Fee Lands are subject to annual property taxes amounting to a total of approximately $8,800.

Mineral Rights on US Forest Service and Bureau of Land Management ("BLM") lands have been reserved to Rosemont Copper Company, via the unpatented claims that surround the patented claims. Wooden posts and stone cairns mark the unpatented claim corners, end lines and discovery monuments, all of which have been surveyed. The unpatented claims are maintained through the payment of annual maintenance fees of $155.00 per claim, for a total of approximately $165,000 per year, payable to the BLM.

There is a 3% NSR royalty on all 132 patented claims, 603 of the unpatented claims, and one parcel of the Associated Fee Lands with an area of approximately 180 acres.

As discussed in the body of this AIF, Hudbay's ownership in the Rosemont project is subject to a precious metals stream agreement with Wheaton Precious Metals.

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History

By the late 1950s, the Banner Mining Company ("Banner") had acquired most of the claims in the area and had drilled the discovery hole into the Rosemont deposit. In 1963, Anaconda Co. acquired options to lease the Banner holdings and over the next ten years they carried out an extensive drilling program on both sides of the mountain. The exploration program demonstrated that a large scale porphyry/skarn existed at Rosemont.

In 1973, Anaconda Mining Co. and Amax Inc. formed a 50/50 partnership to form the Anamax Mining Co. (the "Anamax"). In 1977, following years of drilling and evaluation, the Anamax Joint Venture commissioned the mining consulting firm of Pincock, Allen & Holt, Inc. to estimate a resource for the Rosemont Deposit. Their historical resource estimate of about 445 million tons of sulfide mineralization averaged 0.54% copper using a cut-off grade of 0.20% copper. In addition to the sulfide material, 69 million tons of oxide mineralization averaging 0.45% copper was estimated. Hudbay considers the estimate done by Anaconda to be historical in nature since no work has been done by a Hudbay Qualified Person to verify the estimate, and the estimate should not be relied upon by investors.

ASARCO purchased the patented and unpatented mining claims in the Helvetia-Rosemont mining district in August 1988 and renewed exploration of the Peach-Elgin and initiated engineering studies on Rosemont. In 1995, ASARCO succeeded in acquiring patents on 21 mining claims in the Rosemont area just prior to the moratorium placed on patented mining claims in 1996. In 1999, Grupo Mexico acquired the Helvetia-Rosemont property through a merger with ASARCO. In 2004 Grupo Mexico sold the Rosemont property to a Tucson developer.

In April 2005, Augusta Resource Corp. ("Augusta") purchased the property from Triangle Ventures LLC. Over the next several years, Augusta continued to evaluate the mineral potential at Rosemont and refine the economics of developing this resource.

Hudbay acquired all of the issued and outstanding common shares of Augusta pursuant to a take-over bid, and subsequent acquisition transaction in 2014. Hudbay completed a 43-hole, 92,909 feet (28,319 meters) drill program from September to December 2014 and a 46-hole, 75,164 feet (22,910 meters) drill program from August to November 2015 in further efforts to gain a better understanding of the geological setting and mineralization of the deposit and to collect additional metallurgical and geotechnical information.

Geological Setting, Mineralization, and Deposit Types

The Rosemont deposit consists of copper-molybdenum-silver-gold mineralization primarily hosted in skarn that formed in the Paleozoic rocks as a result of the intrusion of quartz latite to quartz monzonite porphyry intrusions. Bornite-chalcopyrite-molybdenite mineralization occurs as veinlets and disseminations in the skarn.

Three mineralization domains (oxide, mixed and sulfide) were defined based on the soluble to total copper ratio (ASCu/TCu) collected in the Augusta (2005 to 2012) and Hudbay (2014 and 2015) drilling programs. The oxidation and mixed mineralization occurs mainly above a low angle fault defining the contact between the Palozoic and Mesozoic rocks as chrysocolla, copper carbonates and supergene chalcocite.

Drilling to date has defined mineralized zones of approximately 1,100 meters in diameter that extends to a depth of at least 600 meters below the surface. The north-trending, steeply dipping Backbone Fault juxtaposes marginally mineralized Precambrian granodiorite and Lower Paleozoic quartzite and limestone to the west against a block of younger, well-mineralized Paleozoic limestone units to the east.

Most of the copper sulfide resource is contained in the eastern block of the Backbone Fault. Structurally overlying the sulfide resource is a block of Mesozoic sedimentary and volcanic rocks that contains lower grade copper mineralization (predominantly as oxides). These two blocks are separated by the shallowly dipping Low Angle Fault ("LAF"). Other post-mineral features include a deep, gravel-filled Tertiary paleochannel on the south side of the deposit and a significant thickness of Cretaceous and Tertiary volcaniclastic material to the northeast of the deposit.

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Sulfide mineralization on the east side of the Backbone Fault and below the LAF is hosted in an east- dipping package of Paleozoic-age sedimentary rocks that includes the Escabrosa Limestone, Horquilla Limestone, Earp Formation and Epitaph Formation. The Horquilla Limestone is the most significant, accounting for almost half of the sulfide resource.

Relatively minor mineralization occurs in the other Paleozoic units. To the south, the mineralization in this block appears to weaken and eventually die out. To the north, mineralization appears to narrow but continues under cover amid complex faulting. Mineralization is locally open to the east of the defined resource, beyond the limit of drilling and beneath an increasingly thick block of Mesozoic sediments.

The Mesozoic rocks of the structural block above the LAF consist predominantly of arkosic siltstones, sandstones, and conglomerate. Within the Arkose are subordinate andesite flows or sills that range from a few tens of feet to several hundred feet thick. Also structurally wedged into the upper plate block at the base of the Arkose are the Glance Conglomerate, a limestone-cobble conglomerate, and some occurrences of relatively fresh Paleozoic formations.

Exploration

A Titan 24 induced polarization/resistivity (DCIP) survey over the Rosemont deposit, performed in 2011, discovered significant chargeability anomalies which are partially tested. These anomalies appear to define mineralization and also certain unmineralized lithologic units. A regional scale airborne magnetics survey was also completed in 2008. A mapping and geochemical sampling program was completed in the latter half of 2015 on the Rosemont property to reassess the interpretation of the regional geology and deposit setting.

In 2020, Hudbay has conducted exploration drilling on some of its private land claims located northwest of the Rosemont deposit over four known historical deposits where small scale copper mining had been conducted between the late 19^th century until the 1960's. Drilling has confirmed the occurrence of both oxide and sulfide copper mineralization over the Broad Top Butte, Copper World, Peach and Elgin deposits, collectively known as the Copper World properties. The copper mineralization starts in most cases near surface and contains higher grades at shallower depth than at the Rosemont deposit. The Company has commenced a larger follow-up drill program with a focus on enabling an understanding of the full extent of the mineralization at Copper World and potentially defining initial mineral resource estimates.

Drilling

Extensive drilling has been conducted at the Rosemont deposit by several successive property owners. The most recent drilling was by Hudbay, with prior drilling campaigns completed by Banner Mining Company, Anaconda Mining Co., Anamax, ASARCO and Augusta. In total, 155,686 metres of drilling have been completed on the property.

These drill holes were all drilled using diamond drilling (coring) methods. In some cases, the top portion of the older holes were drilled using a rock bit to set the collar or by rotary drilling methods and switching to core drilling before intercepting mineralization.

In all of the drilling campaigns, efforts were consistently made to obtain representative samples by drilling either H-size (2.5 inch or 63.5 mm diameter) or N-size (1.9 inch or 47.6 mm diameter) core. Generally, drill programs were on east-west grid lines spaced approximately 200 feet (61 meters) apart.

Sampling, Analysis, and Data Verification

Prior to Hudbay and Augusta, significant diamond drilling, drill core sampling, and assaying programs were executed by the previous property owners. Records are not available that detail the sampling and security protocols used by these property owners. There are no available QA/QC records for sample preparation and assaying methodologies for Banner, Anaconda, and Anamax. Copper, molybdenum, silver, and soluble copper were analyzed by Anaconda and Anamax at their in-house laboratories. Silver was regularly analyzed by Anamax, but not commonly assayed by Banner and Anaconda. Asarco assayed drill core samples for total copper, molybdenum, and acid soluble copper at Skyline laboratory.

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The drill core was generally sampled continuously down the hole, at a nominal five-foot sample length. In taking a sample, the core is generally halved (split) along the long axis, taking care to evenly distribute veinlets and other small-scale mineralized features where present, into both halves of the core.

The core samples from the Augusta drilling programs from 2005 to 2012 were transported to Skyline Assayers and Laboratories (Skyline), Tucson, Arizona, USA for preparation and analysis. In total, 21,197 samples were analyzed for total copper and 16,619 samples for molybdenum. Total copper and molybdenum were dissolved using a hot 3-acid digestion at 482°F and subsequently analyzed by AAS and ICP-OES, respectively. Silver was determined in 15,334 samples, which were digested using an aqua regia leach in 0.25 g subsample pulp and analyzed by AAS. A total of 391 drill core samples across the Rosemont deposit were measured for specific gravity at Skyline.

Augusta conducted its own internal QA/QC program to independently evaluate the quality of the assays reported by Skyline. Augusta verified the accuracy and precision of its geochemical analyses by inserting standards of known metal content in the sample stream at periodic intervals and by reanalyzing approximately 5% of all samples to check the repeatability of results. Standards were submitted with a frequency of one per 20 samples. The inserted standards were chosen to be similar in grade to the drill holes samples that they accompanied whenever possible. Blank samples were submitted with a frequency of one per 40 samples. Approximately 5% of all samples were reanalyzed in what was called their check assay program.

Under Hudbay ownership, private 24-hour per day security guards administered by Securitas Inc., controlled site access and oversaw sample security at each camp and drill site. Drill core samples from Hudbay's 2014 and 2015 drill programs were picked up at the core processing facilities and transported to Inspectorate America Corporation's preparation facility at Sparks, Nevada, USA. Samples were weighed upon arrival, dried at 60°C, and crushed in jaw crushers to ≥70% passing through 10 mesh (2 mm). The entire crushed sample was homogenized, riffle split, and a 1,000 g subsample was pulverized to ≥85% passing through 200 mesh (75 μm) using Essa standard steel grinding bowls. Jaw crushers, preparation pans, and grinding bowls were cleaned by brush and compressed air between samples. Cleaning with a quartz wash was conducted between jobs and between highly mineralized samples.

Once samples were pulverized a 150 g subsample pulp was collected and air freighted to Bureau Veritas Commodities Canada Ltd., (Bureau Veritas) in Vancouver, Canada, for analysis. The remaining 850 g master pulps and the coarse rejects were stored at the Inspectorate laboratory in Nevada.

As part of Hudbay's quality control and quality assurance (QA/QC) program, QA/QC samples were systematically introduced in the sample stream to assess adequate sub-sampling procedures, potential cross-contamination, precision, and accuracy. A total of 1,000 representative pulp samples (5.4%) from 2014 drilling and 742 representative pulp samples (5.0%) from 2015 drilling were selected and re-analyzed at SGS Canada Inc., laboratory in Vancouver. The blanks, CRM and duplicates samples all indicated the laboratory used did not have contamination issues and produced accurate and precise results.

Hudbay built an entirely new drill hole database from all pre-Hudbay drilling and assaying information. Orix Geoscience Inc. was employed to digitally enter collar, downhole surveys and assay information from scanned drill logs and assay certificates for all holes drilled prior to Augusta.

Mineral Processing and Metallurgical Testing

Following the acquisition of Rosemont in 2014, Hudbay completed two drilling programs and initiated a series of phased metallurgical testing programs, each designed to advance its understanding of the deposit and metallurgical performance in response to treatment.  In 2014, Hudbay engaged XPS Consulting & Testwork Services (XPS) to undertake mineral characterization and metallurgical testwork. Base Met Laboratory (BML) was engaged in late 2015 to provide confirmation testwork of the XPS testwork and additional process optimization.

Through the course of all the mineral processing and metallurgical testing, no deleterious elements were found to have a negative impact on plant performance or on the marketable value of the copper and molybdenum concentrates to be produced at Rosemont.

ANNUAL INFORMATION FORM | B25

On the basis of the body of testwork that exists, including both the historical testwork, and the testing programs completed by Hudbay since the acquisition of Rosemont, forecasts of recovery, concentrate grade and quality, as well as characteristics of the resultant tailing product have been developed. The following summarizes LOM average recoveries expected.

Average LOM recoveries
Copper (Cu):	80.4%
Molybdenum (Mo):	53.4%
Silver (Ag):	74.4%
Gold (Au):	65.1%

Mineral Reserves and Mineral Resources Estimates

Mineral reserves for the Rosemont deposit were classified under the 2014 CIM Definition Standards for Mineral Resources and Mineral Reserves by application of a NSR that reflects the combined benefit of producing copper, molybdenum and silver in addition to mine operating, processing and off-site costs.

The mineral resource and mineral reserve estimates for Rosemont are effective January 1, 2021. Other than as disclosed in this AIF, there are no known metallurgical, environmental, permitting, legal, taxation, socio-economic, marketing or political issues that could reasonably be expected to materially impact the mineral resource and mineral reserve estimates.

Proven and probable mineral reserves within the designed final pit total 592 million tons (537 million tonnes) grading 0.45% Cu, 0.012% Mo and 4.58 g/t Ag. There are 1.25 billion tons (1.13 billion tonnes) of waste materials, resulting in a stripping ratio of 2.1:1 (tonnes waste per tonne of ore). Total material in the pit is 1.66 billion tonnes. Contained metal in proven and probable mineral reserves is estimated at 5.30 billion pounds of copper, 142 million pounds of molybdenum and 79 million ounces of silver. Nearly 80% of the mineral reserves in the Rosemont ultimate pit are classified as proven with the remaining 20% identified as probable. The Rosemont ultimate pit contains approximately 10 million tons of inferred mineral resources that are above the $6.00/ton NSR cut-off value for ore. Inferred mineral resources are considered too speculative geologically to have the economic considerations applied to them that would enable them to be categorized as mineral reserves.

Multi pass ordinary kriging interpolation setup was used to interpolate the grades in the block model while honouring the geology. The component of the mineralization within the block model that meets the requirements for reasonable prospects of economic extraction was based on the application of a Lerchs-Grossman cone pit algorithm. The mineral resources are therefore contained within computer generated open pit geometry.

The following assumptions were applied to the determination of the mineral resources:

• Economic benefit was applied to measured, indicated and inferred classified material within the resource cone.
• No effort was made to establish a pit with maximum return on investment; consequently, the mineral resource cone was the direct result of the following metal prices: $3.15/lb copper, $11.00/lb molybdenum, $18.00/oz silver with a revenue ratio of 1.0, i.e. break-even logic.
• A constant 45-degree pit slope was used for the resource estimate.

All of the mineral reserve estimates presented in this report are dependent on market prices for the contained metals, metallurgical recoveries and ore processing, mining and general/administration cost estimates. Mineral reserve estimates in subsequent evaluations of the Rosemont deposit may vary according to changes in these factors. As of the effective date of this report, other than the ongoing litigation described in this AIF, there are no other known mining, metallurgical, infrastructure or other relevant factors that may materially affect the mineral reserve estimates.

ANNUAL INFORMATION FORM | B26

Mining Operations

The Rosemont project is designed to be a traditional open pit shovel/truck operation. To match the production requirements, the proposed pit operations are designed to be conducted from 50-foot-high benches using large-scale mine equipment, including: 10-5/8-inch-diameter rotary blast hole drills, 60 cubic yard class electric mining shovels, 46 cubic yard class hydraulic shovels, 25 cubic yard front-end loaders, and 260 ton off-highway haul trucks.

Mine operations are scheduled for 24 hours per day, 365 days per year. A mining rate of 132 million tons per year through year 11 will be required to provide the assumed nominal process feed rate of 32.9 million tons of ore per year. From year 12 through year 18, the annual mining rate decreases due to lower stripping ratios, starting with an average of 50 million tons per year and ending with approximately 33 million tons in production year 18. Ore shortfall will be made up from ore stockpiles.

Processing and Recovery Operations

The process plant design is based on a combination of metallurgical testwork, Rosemont Copper production plan and in-house information. The flowsheet has been developed from previous feasibility study work, value engineering studies and the recent testwork.  Benchmarking has been used to define and support the design parameters. This includes the copper-molybdenum separation circuit where testwork has been limited to a few tests. This is due to the relatively large sample mass required for a more detailed molybdenum testwork program and analysis.  The molybdenum plant design is based primarily on projected mass flows, grades and densities as well as the recent Constancia Plant design.

The flowsheet consists of primary crushing, followed by two parallel SAG, ball milling and pebble crushing (SABC) circuits, copper flotation with regrinding ahead of cleaning, a moly separation circuit, concentrate thickening and filtering and tailings thickening, filtering and dry stacking. With minor modifications, the process plant is designed to treat on average 90,000 tons/d (or 32.8 million tons/y). 

Capital and Operating Costs

Initial project capital costs are estimated to be $1,921 million including 15% contingency on all items. The LOM sustaining capital costs are estimated to be $387 million excluding capitalized stripping and $1,168 million including capitalized stripping. The capital cost estimate is considered to be a Class 3 estimate as defined by AACE Recommended Practice 47R-11 for the mining and mineral process industry.

The average LOM operating costs (mining, milling and G&A) are estimated to be $9.24/ton milled (before deducting capitalized stripping) and $7.92/ton milled (after deducting capitalized stripping).

The economic viability of the Project has been evaluated using the metal prices outlined below. The metal prices used in the economic analysis are based on a blend of consensus metal price forecasts from over 30 well known financial institutions and Wood Mackenzie.

Metal Price Assumptions:
Spot Copper:	$3.00 (per pound)
Spot Molybdenum:	$11.00 (per pound)
Spot Silver:	$18.00 (per ounce)
Streamed Silver1:	$3.90 (per ounce)

(1) Subject to a 1% escalation after 3 years

At the effective realized prices including the impact of the stream, the revenue breakdown at Rosemont is approximately 92% copper, 6% molybdenum, and 2% silver.

Rosemont's projected annual copper production (contained copper in concentrate) is expected to average 140 thousand tons of copper over the first 10 years and, over the 19 year LOM, annual production is expected to average 112 thousand tons of copper.

ANNUAL INFORMATION FORM | B27

Rosemont has an unlevered after-tax NPV8% of $769 million and a 15.5% after-tax IRR using a copper price of $3.00 per pound as summarized below. The project NPV and IRR are calculated using end of period quarterly discounting in the quarter immediately before development capital is spent.

Metric	Units	LOM Total
Gross Revenue (Stream Prices)	$M	$13,377
TCRCs	$M	($1,837)
On-Site Operating Costs (after deducting of capitalized stripping)	$M	($4,691)
Royalties	$M	($368)
Operating Margin	$M	$6,480
Development Capital	$M	($1,921)
Stream Upfront Payment	$M	$230
Sustaining Capital (excludes capitalized stripping)	$M	($387)
Capitalized Stripping	$M	($781)
Pre-Tax Cash Flow	$M	$3,622
Cash Income Taxes	$M	($718)
After-Tax Free Cash Flow	$M	$2,903
After-Tax NPV8%	$M	$769
After-Tax NPV10%	$M	$496
After-Tax IRR	%	15.5%
After-Tax Payback Period	Years	5.5

The NPV8% (100% project basis) was sensitized based on percentage changes in various input assumptions above or below the base case. Each input assumption change was assumed to occur independently from changes in other inputs. The project is most sensitive to the copper price, followed by initial capital costs, on-site operating costs and the molybdenum price. The table below reports the after-tax NPV8%, NPV10%, IRR and payback of the project at various flat copper prices assuming all other inputs remain constant.

	Flat Copper Price ($/lb)
	$2.50	$2.75	$3.00	$3.25	$3.50
After-Tax NPV8% ($M)	$45	$412	$769	$1,115	$1,448
After-Tax NPV10% ($M)	($122)	$192	$496	$792	$1,076
After-Tax IRR (%)	8.5%	12.2%	15.5%	18.5%	21.2%
After-Tax Payback (years)	6.9	5.9	5.2	4.7	4.3

The information presented in this section is forward looking information. See "Cautionary Statement on Forward-Looking Information" and "Risks and Uncertainties" in this AIF.

777 MINE

Project Description and Location

The 777 mine is an underground copper and zinc mine with significant precious metals credits located in Flin Flon, Manitoba.

We own a 100% interest in the properties that comprise the 777 mine through mineral leases, Order in Council ("OIC") leases and mineral claims in Manitoba and Saskatchewan. The properties cover approximately 3,800 hectares, including approximately 500 hectares in Manitoba and approximately 3,300 hectares in Saskatchewan. Our surface rights and permits are sufficient for purposes of our current mining operations.

Liabilities associated with the 777 mine are addressed by the closure plans that have been submitted to regulators in both Saskatchewan and Manitoba and financial assurance is in place to address the closure obligations associated with demolition and remediation activities outlined in such closure plans. In addition, closure plans have been submitted and are backed with financial assurance for the associated Flin Flon Metallurgical Complex ("FFMC"), which includes the FFTIA utilized by the 777 mine. Our estimate of this future liability may increase as a result of a new closure plan for the 777 mine and Flin Flon operations. We expect our new Flin Flon closure plan to be submitted to the Manitoba and Saskatchewan governments for approval later in 2021.

ANNUAL INFORMATION FORM | B28

Mineral production from the 777 mine property is subject to a 4% net smelter returns royalty and a 27.56 cents (Canadian) per tonne production royalty pursuant to a Royalty Agreement (the "Royalty Agreement") dated as of January 1, 2015 between HBMS and Callinan Royalties Corporation ("Callinan").

Precious metals production from the 777 mine is subject to our agreement with Wheaton Precious Metals, as described in this AIF.

Accessibility, Climate, Local Resources, Infrastructure and Physiography

The 777 mine is located in Flin Flon, Manitoba, which has a population of approximately 6,000 people, and is accessible by paved highway. Flin Flon is the site of our principal concentrator and zinc plant and has well developed access to rail and air transportation. Personnel requirements for our 777 mine and processing facilities are largely drawn from the immediate area.

Electrical power is supplied from the Manitoba Hydro and Saskatchewan Power Corporation power grids, which are fed by three hydroelectric generating stations. No issues are foreseen for securing additional electrical power in the future if required.

Water for mining activities is supplied from a reservoir located adjacent to the 777 mine site and is sufficient for operations.

Tailings from milling are sent to the Paste Backfill Plant located at the lower level of the mill building. Mixed paste backfill is pumped to one of two lined boreholes adjacent to the mill, where paste is gravity fed to 1,082 metre level for distribution to mined out stopes. Tailings not used in paste production are pumped to the FFTIA. The FFTIA is located in Saskatchewan approximately 500 metres to the west of our Flin Flon Metallurgical Complex.

The 777 mine site is 311 metres above sea level. The geographical area has cool summers and very cold winters with a mean annual temperature of 0.6°C. Operating costs in the first and fourth quarters are typically higher due to additional heating and other seasonal costs.

History

In 1993, the 777 deposit was discovered by an underground exploration hole that intersected the mineralization at a depth of 1,000 metres. In 1995, a drilling program delineated the ore body and by 1997, this ore body was defined. In 1999, development of the 777 mine began as part of the "777 Project" and commercial production from the mine commenced in January 2004. In December 2004, we acquired HBMS and the 777 mine from Anglo American plc.

HBMS took a working option on the 777 property in 1967 from Callinan. In 1988, HBMS acquired Callinan's remaining interest in the property and in return granted Callinan a production royalty and a net profit interest, which net profit interest has since been converted to a net smelter return royalty, as described above.

Geological Setting

The 777 deposit lies in the western portion of the Paleoproterozoic Flin Flon Greenstone Belt. The Greenstone Belt is interpreted to be comprised of a variety of distinct 1.92 to 1.87 Ga tectonostratigraphic assemblages including juvenile arc, back-arc, ocean floor and ocean island, and evolved volcanic arc assemblages that were amalgamated to form an accretionary collage prior to the emplacement of voluminous intermediate to granitoid plutons and generally subsequent deformation. The volcanic assemblages consist of mafic to felsic volcanic rocks with intercalated volcanogenic sedimentary rocks. The younger plutons and coeval successor arc volcanics, volcaniclastic, and sedimentary successor basin rocks include the older, largely marine turbidites of the Burntwood Group and the terrestrial metasedimentary sequences of the Missi Group (which includes the Flin Flon formation).

ANNUAL INFORMATION FORM | B29

The Flin Flon formation is subdivided into three mappable members containing units of heterolithic and monolithic breccias, rhyolite flows and domes, and massive and pillowed basalt flows and flow-top breccias. It is comprised of the Millrock member, which contains the 777 and Callinan mineralization, and in footwall to it the Blue Lagoon and Club members.

A complex succession of felsic and basalt-dominated heterolithic volcaniclastic rocks host the Flin Flon Main, Callinan and 777 VMS deposits within the Greenstone Belt. The north-trending, VMS-hosting, 30 to 700 metre thick volcanic/volcaniclastic succession is recognized for at least 5 kilometres along strike and has an average dip of 60°E. The volcaniclastic rocks have been interpreted to occupy a volcano-tectonic depression within a basaltic footwall succession.

Exploration: Drilling

Diamond drilling is the only drilling type carried out for the purposes of exploration, ore zone definition and sampling of our 777 mine mineralization. The modern 777 drilling program began in the early 2000's and, as of January 1, 2021, a total of 2,943 holes and 396,560 metres had been drilled. Drill hole spacing along the 777 deposit is generally 30 to 50 metres.

Standard procedure is that the core is initially logged and sample intervals are determined by both lithology and a visual estimate of the sulphide mineralization. As a general rule, sample intervals are approximately one metre.

Mineralization

The 777 and Callinan deposits occur within an east-facing sequence of volcanic rocks documented as tholeiitic and basalt-dominated, and dated around 1888 Ma. The rocks immediately hosting the mineralization, however, consist of quartz-phyric ("QP") and quartzfeldspar-phyric rhyolite flows and quartz-feldspar crystal-lithic volcaniclastic rocks of rhyolitic composition.

The 777 deposit can be divided into two main southeast plunging trends, the North Limb and the South Limb, as well as the West Zone. All three zones lie within the same stratigraphic sequence with the same lithofacies as described above. The West Zone lies in the footwall in what is interpreted to be a lower thrust slice and both limbs have the same stratigraphic sequence. On average the lenses strike at 010° and dip to the east at 45°. All zones have a relatively shallow plunge trending at -35° towards 140°. Horizontal widths throughout the deposit range from 2.5 metres to 70 metres in thickness, and can be thicker when two or more zones overlap.

The Callinan deposit is subdivided into two rhyolite horizons termed the East-QP and the West-QP. The East-QP is host to the lenses of the North Zone (northern portion), and the East Zone (southeast portion), and is on the same horizon as the 777 mineralization. The West-QP hosts the South Zone (southwest portion) and its associated lenses. Each of these zones is further subdivided into a number of mineralized lenses. The subdivision of Zones into lenses was based on the spatial distribution of the mineralization. The South Zone lenses generally strikes to the north and dip at 50° to the east with a plunge trending at -50° towards 135°. The North and East Zones generally strike at 020° with a 50° dip to the east with a shallow plunge trending at -30° towards 145°.

Mineralization is generally medium to coarse grained disseminated to solid sulphides consisting of pyrite, chalcopyrite, sphalerite, pyrrhotite, and magnetite. The principle gangue minerals are chlorite and quartz. Alteration minerals include biotite, epidote and actinolite.

Mineral Processing and Metallurgical Testing

The Flin Flon concentrator is an operating plant running at steady state and as a result, several of the initial metallurgical testing and assumptions have been replaced by the operating experience and performance of the plant over its 17 years of operation in processing the ore produced from the 777 mine.

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Sampling Methods and Analysis, Quality Assurance and Quality Control and Sample Security

The samples preparation methods performed on the 777 samples are generally the same as the ones used for the Lalor mine samples, described in the previous pages of this Schedule B.

Mineral Resource and Mineral Reserve Estimates

The mineral resource and mineral reserve estimates for 777 are effective January 1, 2021. Other than as disclosed in this AIF, there are no known metallurgical, environmental, permitting, legal, taxation, socio-economic, marketing or political issues that could reasonably be expected to materially impact the mineral resource and mineral reserve estimates.

1.Mineral Resources

Mineral resources were separated into the 777 and Callinan portions of the deposit. This was done for mining and planning purposes as the Callinan lenses represent the upper, and more historic, portion of the mineralization and the 777 zones represent the lower more recently drilled and identified mineralization. The interpreted lenses of the 777 zones and certain Callinan lenses were built by digitizing polylines around the mineralization. Polylines were then linked with tag strings and triangulated in order to create three dimensional wireframe solids.

The mineral resource modeling was completed using MineSight 12.0-2 software in mine coordinates. The block model was constrained by interpreted 3D wireframes of the mineralization. Gold, silver, copper, zinc, iron, specific gravity and in some cases dilution variables and horizontal width were estimated into blocks using either ordinary kriging or relative co-ordinate kriging for most lenses.

2.Mineral Reserves

Mining, processing and economic parameters were applied to the block model to form the basis of the reserve estimate with an effective date of January 1, 2021. The measured resources were used to estimate the proven mineral reserves and the indicated resources were used to estimate the probable mineral reserves. For mining purposes, there are eight active mining areas in the mine to allow for a blended product with the end goal to send a blended grade to the mill. Mining methods were established for each mining area and a net smelter return ("NSR") was calculated to determine the economic viability. NSR revenues were calculated for each mining area comprised of blocks from the block model assuming metallurgical recoveries and our 2021-2022 average metal prices and exchange rate forecast. To determine the economic viability and NSR margin of each mining block, onsite operating costs, capital development and offsite costs were estimated and applied against copper and zinc concentrate produced for each mining block. The final step of the reserving process involved developing an annualized life-of-mine production plan and supporting cash flow analysis to determine the mineral reserves.

Reconciliation of Reserves and Resources

A year over year reconciliation of our estimated mineral reserves and resources at the 777 mine is set out below.

ANNUAL INFORMATION FORM | B31

Note:

1.Totals may not add up due to number rounding.

Mining Operations

The 777 mine is a multi-lens orebody with shaft access down to the 1,508 metre level. The mine consists of an internal ramp that provides access to each mining level. Mobile tired diesel equipment is utilized. Load haul dump ("LHD") units vary from 8 to 10 cubic yard. Trucks are 40 to 50 tonne units feeding an ore pass system or direct to rock-breakers which feed an underground crusher and ore is skipped to surface via the shaft.

Long-hole open stope is the mining method used at the 777 mine. Mine sequencing involves primary, secondary, chevron and longitudinal retreat stopes that are either paste or unconsolidated loose waste rock backfilled. Long-hole stopes are mined at 15 to 17 metre vertical sill to sill intervals. Stope strike lengths are generally 16 metres with widths of 3 to 100 metres, with an average of approximately 20 metres. The ore is undercut at the top and bottom of the block, providing access for drilling and mucking. Drilling is done by top hammer long-hole drills with holes varying in length between 10 metres and 20 metres long and a hole diameter of 3 inches. Mucking is accomplished by remote LHD units and then loaded to haul trucks. Ore at the 777 mine is loaded by LHDs to underground haul trucks, which dump to a series of ore passes that feed three chutes on 1,412 metre level. Haul trucks are loaded from the chutes and haul the ore directly to the main ore pass system on 1,412 metre level. The ore is temporarily stored in a 1,725 tonne coarse ore bin that feeds the crusher. From the crusher it is conveyed to a 1,600 tonne fine ore bin, where it is conveyed to a loading pocket at the 1,508 metre level and placed into two 15 tonne skips and hoisted to surface. The ore on surface is hauled by 53 to 63 tonne haulage trucks directly to the Flin Flon concentrator or is dumped on a stockpile close to the concentrator.

Ore from the 777 North mine is loaded onto haul trucks by LHDs and transported up the ramp to surface. The ore is dumped on the ground prior to being sent through a surface crusher operated by a contractor. The ore is then loaded and transported for processing at the Flin Flon concentrator or stockpiled nearby.

Our Flin Flon concentrator processes 777 ore into copper and zinc concentrates. Copper concentrate is sold to third party purchasers and zinc concentrate is sent to our Flin Flon zinc plant where it is further processed into special high grade and continuous galvanizing grade aluminum alloy zinc metal before being sold to third party purchasers. See "Description of our Business - Other Assets - Processing Facilities" and "Description of our Business - Other Information - Products and Marketing".

ANNUAL INFORMATION FORM | B32

Exploration and Development

The 777 mine life has been confirmed to extend until the second quarter of 2022, based on the most recent estimate of mineral reserves. No additional exploration or mine development has been considered.

ANNUAL INFORMATION FORM | B33

SCHEDULE C: AUDIT COMMITTEE CHARTER

HUDBAY MINERALS INC.

(THE "COMPANY")

AUDIT COMMITTEE CHARTER

PURPOSE

The Audit Committee is appointed by the Board of Directors to assist the Board of Directors in its oversight and evaluation of:

•the quality and integrity of the financial statements of the Company,

•the compliance by the Company with legal and regulatory requirements in respect of financial disclosure,

•the qualification, independence and performance of the Company's independent auditor,

•the appointment, independence and performance of the Company's head of the internal audit function,

•the assessment, monitoring and management of the strategic, operational, reporting and compliance risks of the Company's business (the "Risks"), and

•The performance of the Company's Chief Financial Officer.

In addition, the Audit Committee provides an avenue for communication among the independent auditor, the internal audit function, the Company's Chief Financial Officer and other financial senior management, other employees and the Board of Directors concerning accounting, auditing and Risk management matters.

The Audit Committee is directly responsible for the recommendation of the appointment and retention (and termination) and for the compensation and the oversight of the work of the independent auditor (including oversight of the resolution of any disagreements between senior management and the independent auditor or the internal audit function regarding financial reporting) for the purpose of preparing audit reports or performing other audit, review or attest services for the Company. Also, the Audit Committee is directly responsible for the approval of the appointment and retention (and termination) and the oversight of the work of the internal audit function.

The Audit Committee is not responsible for:

•planning or conducting audits,

•certifying or determining the completeness or accuracy of the Company's financial statements or that those financial statements are in accordance with generally accepted accounting principles.

Each member of the Audit Committee shall be entitled to rely in good faith upon:

•financial statements of the Company represented to him or her by senior management of the Company or in a written report of the independent auditor to present fairly the financial position of the Company in accordance with generally accepted accounting principles; and

•any report of a lawyer, accountant, engineer, appraiser or other person whose profession lends credibility to a statement made by any such person.

The fundamental responsibility for the Company's financial statements and disclosure rests with senior management.

ANNUAL INFORMATION FORM | C1

REPORTS

The Audit Committee shall report to the Board of Directors on a regular basis and, in any event, before the public disclosure by the Company of its quarterly and annual financial results. The reports of the Audit Committee shall include any issues of which the Audit Committee is aware with respect to the quality or integrity of the Company's financial statements, its compliance with legal or regulatory requirements, the performance and independence of the Company's independent auditor, the performance and independence of the Company's internal audit function and changes in Risks.

The Audit Committee also shall prepare, as required by applicable law, any audit committee report required for inclusion in the Company's publicly filed documents.

COMPOSITION

The members of the Audit Committee shall be three or more individuals who are appointed (and may be replaced) by the Board of Directors on the recommendation of the Company's Corporate Governance and Nominating Committee. The appointment of members of the Audit Committee shall take place annually at the first meeting of the Board of Directors after a meeting of shareholders at which directors are elected, provided that if the appointment of members of the Audit Committee is not so made, the directors who are then serving as members of the Audit Committee shall continue as members of the Audit Committee until their successors are appointed. The Board of Directors may appoint a member to fill a vacancy that occurs in the Audit Committee between annual elections of directors. Any member of the Audit Committee may be removed from the Audit Committee by a resolution of the Board of Directors. Unless the Chair is elected by the Board of Directors, the members of the Audit Committee may designate a Chair by majority vote of the members of the Audit Committee.

Each of the members of the Audit Committee shall meet the Company's Categorical Standards for Determining Independence of Directors and shall be financially literate (or acquire that familiarity within a reasonable period after appointment) in accordance with applicable legislation and stock exchange requirements. No member of the Audit Committee shall:

•accept (directly or indirectly) any consulting, advisory or other compensatory fee from the Company or any of its subsidiaries1 (other than remuneration for acting in his or her capacity as a director or committee member) or be an "affiliated person"2 of the Company or any of its subsidiaries, or

•concurrently serve on the audit committee of more than three other public companies without the prior approval of the Audit Committee, the Corporate Governance and Nominating Committee and the Board of Directors and their determination that such simultaneous service would not impair the ability of the member to effectively serve on the Audit Committee (which determination shall be disclosed in the Company's annual management information circular).

Notes:

1 A company is a subsidiary of another company if it is controlled, directly or indirectly, by that other company (through one or more intermediaries or otherwise).

2 An "affiliate" of a person is a person that, directly or indirectly, through one or more intermediaries, controls, or is controlled by, or is under common control with the first person.

ANNUAL INFORMATION FORM | C2

RESPONSIBILITIES

Independent Auditor

The Audit Committee shall:

•Recommend the appointment and the compensation of, and, if appropriate, the termination of the independent auditor, subject to such Board of Directors and shareholder approval as is required under applicable legislation and stock exchange requirements.

•Obtain confirmation from the independent auditor that it ultimately is accountable, and will report directly, to the Audit Committee and the Board of Directors.

•Oversee the work of the independent auditor, including the resolution of any disagreements between senior management and the independent auditor regarding financial reporting.

•Pre-approve all audit and non-audit services (including any internal control-related services) provided by the independent auditor (subject to any restrictions on such non-audit services imposed by applicable legislation, regulatory requirements and policies of the Canadian Securities Administrators).

•Adopt such policies and procedures as it determines appropriate for the pre-approval of the retention of the independent auditor by the Company and any of its subsidiaries for any audit or non-audit services, including procedures for the delegation of authority to provide such approval to one or more members of the Audit Committee.

•Provide notice to the independent auditor of every meeting of the Audit Committee.

•Approve all engagements for accounting advice prepared to be provided by an accounting firm other than independent auditor.

•Review quarterly reports from senior management on tax advisory services provided by accounting firms other than the independent auditor.

•Review expense reports of the Chairman and the Chief Executive Officer.

Internal Audit Function

The Audit Committee shall:

•Approve the appointment and, if appropriate, the termination of the head of the internal audit function.

•Obtain confirmation from the head of the internal audit function that he or she is ultimately accountable, and will report directly, to the Audit Committee.

•Oversee the work of the internal audit function, including the resolution of any disagreements between senior management and the internal audit function.

•Approve the internal audit function annual plan.

•Review quarterly reports from the head of the internal audit function.

ANNUAL INFORMATION FORM | C3

The Audit Process, Financial Statements and Related Disclosure

The Audit Committee shall:

•Meet with senior management and/or the independent auditor to review and discuss,

•the planning and staffing of the audit by the independent auditor,

•before public disclosure, the Company's annual audited financial statements and quarterly financial statements, the Company's accompanying disclosure of Management's Discussion and Analysis and earnings press releases and make recommendations to the Board of Directors as to their approval and dissemination of those statements and disclosure,

•financial information and earnings guidance provided to analysts and rating agencies: this review need not be done on a case by case basis but may be done generally (consisting of a discussion of the types of information disclosed and the types of presentations made) and need not take place in advance of the disclosure,

•any significant financial reporting issues and judgments made in connection with the preparation of the Company's financial statements, including any significant changes in the selection or application of accounting principles, any major issues regarding auditing principles and practices, and the adequacy of internal controls that could significantly affect the Company's financial statements,

•all critical accounting policies and practices used,

•all alternative treatments of financial information within IFRS that have been discussed with senior management, ramifications of the use of such alternative disclosures and treatments, and the treatment preferred by the independent auditor,

•the use of "pro forma" or "adjusted" non-IFRS information,

•the effect of new regulatory and accounting pronouncements,

•the effect of any material off-balance sheet structures, transactions, arrangements and obligations (contingent or otherwise) on the Company's financial statements,

•any disclosures concerning any weaknesses or any deficiencies in the design or operation of internal controls or disclosure controls made to the Audit Committee in connection with certification of forms by the Chief Executive Officer and/or the Chief Financial Officer for filing with applicable securities regulators, and

•the adequacy of the Company's internal accounting controls and management information systems and its financial, auditing and accounting organizations and personnel (including any fraud involving an individual with a significant role in internal controls or management information systems) and any special steps adopted in light of any material control deficiencies.

•Review disclosure of financial information extracted or derived from the Company's financial statements.

•Review with the independent auditor,

•the quality, as well as the acceptability of the accounting principles that have been applied,

•any problems or difficulties the independent auditor may have encountered during the provision of its audit services, including any restrictions on the scope of activities or access to requested information and any significant disagreements with senior management, any management letter provided by the independent auditor or other material communication (including any schedules of unadjusted differences) to senior management and the Company's response to that letter or communication, and

ANNUAL INFORMATION FORM | C4

•any changes to the Company's significant auditing and accounting principles and practices suggested by the independent auditor or other members of senior management.

Risks

The Audit Committee shall:

•Recommend to the Board of Directors for approval a policy that sets out the Risks philosophy of the Company and the expectations and accountabilities for identifying, assessing, monitoring and managing Risks (the "ERM Policy") that is developed and is to be implemented by senior management.

•Meet with senior management to review and discuss senior management's timely identification of the most significant Risks, including those Risks related to or arising from the Corporation's weaknesses, threats to the Corporation's business and the assumptions underlying the Corporation's strategic plan ("Principal Risks").

•Approve a formalized, disciplined and integrated enterprise risk management process (the "ERM Process") that is developed by senior management and, as appropriate, the Board and its Committees, to monitor, manage and report Principal Risks.

•Recommend to the Board of Directors for approval policies (and changes thereto) setting out the framework within which each identified Principal Risks of the Corporation shall be managed.

•At least semi-annually, obtain from senior management and, as appropriate, with the input of one or more of the Board's Committees, a report specifying the management of the Principal Risks of the Corporation including compliance with the ERM Policy and other policies of the Corporation for the management of Principal Risks.

•Review with senior management the Company's tolerance for financial Risk and senior management's assessment of the significant financial Risks facing the Company.

•Discuss with senior management, at least annually, the guidelines and policies utilized by senior management with respect to financial Risk assessment and management, and the major financial Risk exposures and the procedures to monitor and control such exposures in order to assist the Audit Committee to assess the completeness, adequacy and appropriateness of financial Risk disclosure in Management's Discussion and Analysis and in the financial statements.

•Review policies and compliance therewith that require significant actual or potential liabilities, contingent or otherwise, to be reported to the Board of Directors in a timely fashion.

•Review the adequacy of insurance coverages maintained by the Company.

•Discharge the Board's oversight function in respect of the administration of the pension and other retirement plans of the Company and its affiliates.

ANNUAL INFORMATION FORM | C5

Compliance

The Audit Committee shall:

•Obtain reports from senior management that the Company's subsidiary/foreign affiliated entities are in conformity with applicable legal requirements and the Company's Code of Business Conduct and Ethics including disclosures of insider and affiliated party transactions and environmental protection laws and regulations.

•Review with senior management and the independent auditor any correspondence with regulators or governmental agencies and any employee complaints or published reports, which raise material issues regarding the Company's financial statements or accounting policies.

•Review senior management's written representations to the independent auditor.

•Advise the Board of Directors with respect to the Company's policies and procedures regarding compliance with applicable laws and regulations and with the Company's Code of Business Conduct and Ethics.

•Review with the Company's General Counsel legal matters that may have a material impact on the financial statements, the Company's compliance policies and any material reports or inquiries received from regulators or governmental agencies.

•Establish procedures for,

•the receipt, retention and treatment of complaints regarding accounting, internal accounting controls or auditing matters, and

•the confidential, anonymous submission by employees of the Company with concerns regarding any accounting or auditing matters.

Delegation

To avoid any confusion, the Audit Committee responsibilities identified above are the sole responsibility of the Audit Committee, unless otherwise directed by the Board of Directors.

INDEPENDENT ADVICE

In discharging its mandate, the Audit Committee shall have the authority to retain (and authorize the payment by the Company of) and receive advice from special legal, accounting or other advisors as the Audit Committee determines to be necessary to permit it to carry out its duties.

ANNUAL INFORMATION FORM | C6

EX-99.2

Audited Consolidated Financial Statements

(In US dollars)

HUDBAY MINERALS INC.

Years ended December 31, 2020 and 2019

MANAGEMENT'S REPORT ON INTERNAL CONTROL OVER FINANCIAL REPORTING

Management of Hudbay Minerals Inc. ("Hudbay" or the "Company") is responsible for establishing and maintaining internal control over financial reporting ("ICFR").

Under the supervision of and with the participation of the Chief Executive Officer and the Chief Financial Officer, Hudbay's management assessed the effectiveness of the Company's ICFR as of December 31, 2020 based upon the Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission. Based on this evaluation, management concluded that Hudbay's ICFR was effective as of December 31, 2020.

The effectiveness of the Company's ICFR as of December 31, 2020 has been audited by Deloitte LLP, Independent Registered Public Accounting Firm, as stated in their report immediately preceding the Company's audited consolidated financial statements for the year ended December 31, 2020.

Peter Kukielski	Steve Douglas
President and Chief Executive Officer	Senior Vice President and Chief Financial Officer

Toronto, Canada

February 18, 2021

Deloitte Canada
Bay Adelaide Centre
8 Adelaide Street West
Suite 200
Toronto, ON. M5H 0A9
Canada


Tel: +1 (416) 601 6150
Fax: +1 (416) 601 6151
www.deloitte.ca

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Shareholders and the Board of Directors of Hudbay Minerals Inc.

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheets of Hudbay Minerals Inc. and subsidiaries (the "Company") as of December 31, 2020 and 2019, the related consolidated income statements, consolidated statements of comprehensive loss, changes in equity and cash flows for each of the two years in the period ended December 31, 2020, and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2020 and 2019, and its financial performance and its cash flows for each of the two years in the period ended December 31, 2020, in conformity with International Financial Reporting Standards as issued by the International Accounting Standards Board.

We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company's internal control over financial reporting as of December 31, 2020, based on criteria established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission and our report dated February 18, 2021, expressed an unqualified opinion on the Company's internal control over financial reporting.

Basis for Opinion

These financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company's financial statements based on our audits. We are a public accounting firm registered with the 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 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. Our audits included performing procedures to assess the risks of material misstatement of the 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 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 financial statements. We believe that our audits provide a reasonable basis for our opinion.

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 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.

Impairment - Assessment of Whether Indicators of Impairment or Impairment Reversal Exist in Non-financial Assets - Refer to Note 2e and 3j to the financial statements

Critical Audit Matter Description

The Company's determination of whether an indicator of impairment or impairment reversal exists in non-financial assets at the cash generating unit ("CGU") level requires significant management judgment. 

While there are several inputs that are required to determine whether or not an indicator of impairment or impairment reversal exists, the judgments with the highest degree of subjectivity are the future long-term copper price and the discount rate.  Auditing these estimates and inputs required a high degree of subjectivity in applying audit procedures and in evaluating the results of those procedures.  This resulted in an increased extent of audit effort, including the involvement of a fair value specialist.

How the Critical Audit Matter Was Addressed in the Audit

Our audit procedures related to the future long-term copper price and the discount rate in the assessment of indicators of impairment or impairment reversal, included the following, among others:

•Evaluated the effectiveness of controls over management's assessment of the indicators of impairment.

•With the assistance of a fair value specialist:

◦Evaluated the future long-term copper price by comparing management forecasts to third party forecasts, and

◦Evaluated the reasonableness of the discount rate by comparing the key inputs to external data.

/s/ Deloitte LLP

Chartered Professional Accountants

Licensed Public Accountants

Toronto, Canada

February 18, 2021

We have served as the Company's auditor since 2005.

Deloitte Canada
Bay Adelaide Centre
8 Adelaide Street West
Suite 200
Toronto, ON. M5H 0A9
Canada


Tel: +1 (416) 601 6150
Fax: +1 (416) 601 6151
www.deloitte.ca

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Shareholders and the Board of Directors of Hudbay Minerals Inc.

Opinion on Internal Control over Financial Reporting

We have audited the internal control over financial reporting of Hudbay Minerals Inc. and subsidiaries (the "Company") as of December 31, 2020, 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 Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2020, based on criteria established in Internal Control - Integrated Framework (2013) issued by COSO.

We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the consolidated financial statements as of and for the year ended December 31, 2020, of the Company and our report dated February 18, 2021, expressed an unqualified opinion on those financial statements.

Basis for Opinion

The Company's management is responsible 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 Report on Internal Control over Financial Reporting. Our responsibility is to express an opinion on the Company's internal control over financial reporting based on our audit. We are a public accounting firm registered with the 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 effective internal control over financial reporting was maintained in all material respects. Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

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 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.

/s/ Deloitte LLP

Chartered Professional Accountants

Licensed Public Accountants

Toronto, Canada

February 18, 2021

HUDBAY MINERALS INC.
Consolidated Balance Sheets
(in thousands of US dollars)

			Dec. 31,			Dec. 31,
	Note		2020			2019
Assets
Current assets
Cash	7	$	439,135		$	396,146
Trade and other receivables	8		141,199			105,994
Inventories	9		143,105			138,820
Prepaid expenses and other current assets			16,717			12,737
Other financial assets	10		3,073			2,049
Taxes receivable			12,446			7,289
			755,675			663,035
Receivables	8		18,568			19,264
Inventories	9		22,006			19,455
Other financial assets	10		15,669			11,287
Intangibles and other assets	11		21,173			10,411
Property, plant and equipment	12		3,731,655			3,662,559
Deferred tax assets	22b		101,899			75,046
		$	4,666,645		$	4,461,057
Liabilities
Current liabilities
Trade and other payables	13	$	233,147		$	192,404
Taxes payable			2,701			2,146
Other liabilities	14		51,971			49,411
Other financial liabilities	15		24,713			28,076
Lease liabilities	16		33,473			32,781
Deferred revenue	18		102,782			86,933
			448,787			391,751
Other financial liabilities	15		194,378			39,784
Lease liabilities	16		30,041			49,166
Long-term debt	17		1,135,675			985,255
Deferred revenue	18		443,902			476,823
Provisions	19		331,799			280,850
Pension obligations	20		23,316			29,599
Other employee benefits	21		129,508			116,778
Deferred tax liabilities	22b		229,433			242,928
			2,966,839			2,612,934
Equity
Share capital	23b		1,777,340			1,777,340
Reserves			(24,200	)		(24,250	)
Retained earnings			(53,334	)		95,033
			1,699,806			1,848,123
		$	4,666,645		$	4,461,057
Commitments (note 28)

1

HUDBAY MINERALS INC.
Consolidated Income Statements
(in thousands of US dollars)

	Note		Year ended December 31,
			2020			2019
Revenue	6a	$	1,092,418		$	1,237,439
Cost of sales
Mine operating costs			691,591			741,342
Depreciation and amortization	6b		361,827			344,555
			1,053,418			1,085,897
Gross profit			39,000			151,542
Selling and administrative expenses			41,408			36,170
Exploration and evaluation expenses			17,196			30,774
Other expenses	6d		17,583			51,116
Impairment loss	6e		-			322,249
Results from operating activities			(37,187	)		(288,767	)
Net interest expense on long term debt	6g		82,712			68,375
Accretion on streaming arrangements	6g		56,670			69,772
Change in fair value of financial instruments	6g		(29,370	)		8,247
Other net finance costs	6g		31,890			17,602
Net finance expense			141,902			163,996
Loss before tax			(179,089	)		(452,763	)
Tax recovery	22a		(34,505	)		(108,953	)
Loss for the year		$	(144,584	)	$	(343,810	)
Loss per share
Basic and diluted		$	(0.55	)	$	(1.32	)
Weighted average number of common shares outstanding:
Basic and diluted	25		261,272,151			261,272,151

2

HUDBAY MINERALS INC.
Consolidated Statements of Cash Flows
(in thousands of US dollars)

	Note		Year ended December 31,
			2020			2019
Cash generated from operating activities:
Loss for the year		$	(144,584	)	$	(343,810	)
Tax recovery	22a		(34,505	)		(108,953	)
Items not affecting cash:
Depreciation and amortization	6b		363,603			346,634
Share-based compensation	6c		15,008			2,714
Net interest expense on long term debt	6g		82,712			68,375
Accretion on streaming arrangements	6g		56,670			69,772
Change in fair value of financial instruments	6g		(29,370	)		8,247
Other net finance costs	6g		31,890			17,602
Inventory write-down	9		32			504
Amortization of deferred revenue and variable consideration	6a		(73,931	)		(76,103	)
Pension and other employee benefit payments, net of accruals			3,043			2,148
Write-down of UCM Receivable	6d		-			25,978
Asset impairment	6e		-			322,249
Decommissioning and restoration payments	19		(18,737	)		(4,136	)
Other 1			2,673			2,916
Taxes paid			(12,641	)		(26,853	)
Operating cash flow before change in non-cash working capital			241,863			307,284
Change in non-cash working capital	30a		(2,383	)		3,572
			239,480			310,856
Cash used in investing activities:
Acquisition of property, plant and equipment			(361,185	)		(259,202	)
Acquisition of subsidiary, net of cash acquired			-			(44,688	)
Change in restricted cash			-			3,401
Interest received			2,167			8,119
			(359,018	)		(292,370	)
Cash generated from/(used) in financing activities:
Issuance of senior unsecured notes, net of transaction costs	17a		591,824			-
Principal repayments	17a		(400,000	)		-
Premium paid on redemption of notes	17a		(7,252	)		-
Interest paid on long-term debt			(81,517	)		(74,750	)
Financing costs			(16,204	)		(26,149	)
Lease payments	16		(35,980	)		(32,952	)
Gold prepayment proceeds	15		115,005			-
Dividends paid	23b		(3,783	)		(3,927	)
			162,093			(137,778	)
Effect of movement in exchange rates on cash			434			(59	)
Net increase (decrease) in cash			42,989			(119,351	)
Cash, beginning of the year			396,146			515,497
Cash, end of the year		$	439,135		$	396,146
1 Includes disbursements for share-based compensation, restructuring, realized foreign exchange gains and losses and Pampacancha delivery obligation payments.
For supplemental information, see note 30.

3

HUDBAY MINERALS INC.
Consolidated Statements of Comprehensive Loss
(in thousands of US dollars)

		Year ended December 31,
		2020			2019
Loss for the year	$	(144,584	)	$	(343,810	)
Other comprehensive income:
Item that will be reclassified subsequently to profit or loss:
Recognized directly in equity:
Net gain on translation of foreign currency balances		4,170			9,220
		4,170			9,220
Items that will not be reclassified subsequently to profit or loss:
Recognized directly in equity:
Gold prepayment revaluation (note 27a)		(1,885	)		-
Tax effect (note 22c)		506			-
Remeasurement - actuarial loss (note 20 & 21)		(2,598	)		(20,072	)
Tax effect (note 22c)		(1,265	)		1,878
		(5,242	)		(18,194	)
Other comprehensive loss net of tax, for the year		(1,072	)		(8,974	)
Total comprehensive loss for the year	$	(145,656	)	$	(352,784	)

4

HUDBAY MINERALS INC.
Consolidated Statements of Changes in Equity
(in thousands of US dollars)

		Share capital (note 23)		Other capital reserves		Foreign currency translation reserve			Remeasurement reserve			Retained earnings			Total equity
Balance, January 1, 2019	$	1,777,340	$	28,837	$	(11,819	)	$	(58,272	)	$	442,770		$	2,178,856
Loss		-		-		-			-			(343,810	)		(343,810	)
Other comprehensive income (loss)		-		-		9,220			(18,194	)		-			(8,974	)
Total comprehensive income (loss)		-		-		9,220			(18,194	)		(343,810	)		(352,784	)
Dilution of Partner's investor in Rosemont (note 5)				25,978											25,978
Contributions by and distributions to owners:
Dividends (note 23b)		-		-		-			-			(3,927	)		(3,927	)
Total contributions by and distributions to owners		-		-		-			-			(3,927	)		(3,927	)
Balance, December 31, 2019	$	1,777,340	$	54,815	$	(2,599	)	$	(76,466	)	$	95,033		$	1,848,123

5

HUDBAY MINERALS INC.
Consolidated Statements of Changes in Equity
(in thousands of US dollars)

		Share capital (note 23)		Other capital reserves		Foreign currency translation reserve			Remeasurement reserve			Retained earnings			Total equity
Balance, January 1, 2020	$	1,777,340	$	54,815	$	(2,599	)	$	(76,466	)	$	95,033		$	1,848,123
Loss		-		-		-			-			(144,584	)		(144,584	)
Other comprehensive income (loss)		-		-		4,170			(5,242	)		-			(1,072	)
Total comprehensive income (loss)		-		-		4,170			(5,242	)		(144,584	)		(145,656	)
Contributions by and distributions to owners:
Dividends (note 23b)		-		-		-			-			(3,783	)		(3,783	)
Stock options (note 6c)		-		1,122		-			-			-			1,122
Total contributions by and distributions to owners		-		1,122		-			-			(3,783	)		(2,661	)
Balance, December 31, 2020	$	1,777,340	$	55,937	$	1,571		$	(81,708	)	$	(53,334	)	$	1,699,806

6

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

1.Reporting entity

On January 1, 2017, Hudbay Minerals Inc. amalgamated under the Canada Business Corporations Act with its subsidiaries Hudson Bay Mining and Smelting Co., Limited and Hudson Bay Exploration and Development Company Limited to form Hudbay Minerals Inc. ("HMI" or the "Company"). The address of the Company's principal executive office is 25 York Street, Suite 800, Toronto, Ontario. The consolidated financial statements of the Company for the year ended December 31, 2020 and 2019 represent the financial position and the financial performance of the Company and its subsidiaries (together referred to as "Hudbay").

Wholly owned subsidiaries as at December 31, 2020 and 2019 include HudBay Marketing & Sales Inc. ("HMS"), HudBay Peru Inc., HudBay Peru S.A.C. ("Hudbay Peru"), HudBay (BVI) Inc., Hudbay Arizona Inc, Rosemont Copper Company ("Rosemont") and Mason Resources (US) Inc. ("Mason").

Hudbay is an integrated mining company primarily producing copper concentrate (containing copper, gold and silver), molybdenum concentrate and zinc metal. With assets in North and South America, Hudbay is focused on the discovery, production and marketing of base and precious metals. Directly and through its subsidiaries, Hudbay owns three polymetallic mines, four ore concentrators and a zinc production facility in northern Manitoba and Saskatchewan (Canada) and Cusco (Peru) and copper projects in Arizona and Nevada (United States). Hudbay also has equity investments in a number of junior exploration companies. The Company is governed by the Canada Business Corporations Act and its shares are listed under the symbol "HBM" on the Toronto Stock Exchange, New York Stock Exchange and Bolsa de Valores de Lima.

2.Basis of preparation

(a)Statement of compliance:

These consolidated financial statements have been prepared in accordance with International Financial Reporting Standards ("IFRS") as issued by the International Accounting Standards Board ("IASB") effective for the year ended December 31, 2020.

The Board of Directors approved these consolidated financial statements on February 18, 2021.

(b)Functional and presentation currency:

Hudbay's consolidated financial statements are presented in US dollars, which is the Company's and all material subsidiaries' functional currency, except the Company's Manitoba business unit, which has a functional currency of Canadian dollars. All values are rounded to the nearest thousand ($000) except where otherwise indicated.

7

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

    (c)    Basis of measurement:

The consolidated financial statements have been prepared on the historical cost basis except for the following items in the consolidated balance sheets:

-Derivatives, embedded derivatives, other financial instruments, and financial assets measured at fair value through profit or loss ("FVTPL");

-Liabilities for cash-settled share-based compensation arrangements are measured at fair value; and,

-A defined benefit liability is recognized as the net total of the plan assets, unrecognized past service costs and unrecognized actuarial losses, less unrecognized actuarial gains and the present value of the defined benefit obligation.

(d)  COVID-19 estimation uncertainty:

At the end of 2019, a novel strain of coronavirus ("COVID-19") was reported in China. The COVID-19 outbreak has developed rapidly in 2020, with a significant number of infections around the world, including regions Hudbay operates in. On March 11, 2020, the World Health Organization declared the COVID-19 outbreak a global pandemic. Since then, containment measures have resulted in decreased economic activity, which has adversely affected the broader global economy.

The resulting impacts on global commerce have been and continue to be far-reaching. To date there has been volatility in stock markets, commodities and foreign exchange markets, restrictions on the conduct of business in many jurisdictions and the global movement of people and some goods have become restricted.

The Company has evaluated the potential impacts arising from COVID-19 on all aspects of its business, with particular attention to indicators of impairment / reversal of impairment of non-financial assets, inventory and accounts receivable valuations, impacts on pension and other employee benefit discount rates, and deferred tax provisions.

In all these areas, for the year ended December 31, 2020, there was no significant financial impact on the Company.

(e)  Use of judgements and estimates:

The preparation of the consolidated financial statements in conformity with IFRS requires Hudbay to make judgements, estimates and assumptions that affect the application of accounting policies, reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements, and reported amounts of revenue and expenses during the reporting period. Actual results may differ from these estimates.

Hudbay reviews these estimates and underlying assumptions on an ongoing basis, based on experience and other factors, including expectations of future events that the Company believes to be reasonable under the circumstances. Revisions to accounting estimates are recognized prospectively in the period in which the estimates are revised and in any future periods affected.

8

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

The following are critical and significant judgements and estimates impacting the consolidated financial statements:

-Indicators and testing of impairment (reversal of impairment) of non-financial assets (notes 3i, 3j and 12) - There are a number of potential indicators that could trigger non-financial asset impairment or reversal of impairment. These indicators may require critical judgements to determine the extent that external and/or internal environmental business changes may impact Hudbay's overall assessment of the recoverability of non-financial assets. Such business changes include changes to the life of mine ("LOM") plan, changes to budget, and changes to long-term commodity prices. If an impairment or impairment reversal indicator is noted then there are also critical estimates involved in the determination of the recoverable amount of cash generating units ("CGU"). Recoverable amounts are calculated using discounted after-tax cash flows based on cash flow projections and assumptions in Hudbay's most recent LOM plans. LOM plans are based on optimized mine and processing plans and the assessment of capital expenditure requirements of a mine site. LOM plans incorporate management's best estimates of key assumptions which include future commodity prices, the value of mineral resources not included in the Constancia and Arizona LOM plan, production based on current estimates of recoverable reserves, discount rates, future operating and capital costs and future foreign exchange rates. Most critical to the value of the recoverable amount are the assumptions of future commodity prices and the value of mineral resources not included in the Constancia and Arizona LOM plan. Expected future cash flows used to determine the recoverable amount during impairment testing are inherently uncertain and could materially change over time. Should management's estimate of the future not reflect actual events, impairments may be identified, which could have a material effect on Hudbay's consolidated financial statements. Although it is reasonably possible for a change in key assumptions to occur, the possible effects of a change in any single assumption may not fairly reflect the impact of CGU's fair value as the assumptions are inextricably linked.

-IFRS 15 - Revenue- stream transactions (note 18) - Hudbay has determined that the precious metals stream contracts are subject to variable consideration and contain a significant financing component. As such, Hudbay recognizes a financing charge at each reporting period and grosses up the deferred revenue balance to recognize the significant financing element that is part of these contracts. Significant judgement was required in determining if the stream transactions were to be accounted for as deferred revenue. Management has determined that these stream transactions are not derivatives since obligations will be satisfied through the delivery of non-financial items (i.e., gold and silver credits) rather than cash or financial assets. It is management's intention to settle the obligations under the stream transactions through its own production and if this is not possible, this would lead to the stream transactions becoming a financial instrument since a cash settlement payment may be required. This would cause a change to the accounting treatment, resulting in the revaluation of the fair value of the agreement through the income statement on a recurring basis.

-Mineral reserves and resources (notes 3i, 3m, 3o and 18) - Hudbay estimates mineral reserves and resources to determine future recoverable mine production based on assessment of geological, engineering and metallurgical analyses, estimates of future production costs, capital costs and reclamation costs, as well as long term commodity prices and foreign exchange rates. There are numerous uncertainties inherent in estimating mineral reserves and resources, including many factors beyond Hudbay's control. The estimates are based on information compiled by appropriately qualified persons relating to the geological data on the size, depth and shape of the ore body and interpreting this data requires complex geological judgements. Changes in assumptions, including economic assumptions such as metals prices and market conditions, could have a material effect on the financial position and results of operations.

Changes in the mineral reserve or resource estimates may affect:

-the carrying value of exploration and evaluation assets, capital works in progress, mining properties and plant and equipment;

9

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

-depreciation expense for assets depreciated either on a unit-of-production basis or on a straight line basis where useful lives are restricted by the life of the related mine plan;

-the provision for decommissioning, restoration and similar liabilities;

-the carrying value of deferred tax assets; and,

-amortization of deferred revenue.

-Property plant and equipment (notes 3i and 12) - The carrying amounts of property, plant and equipment and exploration and evaluation assets on Hudbay's consolidated balance sheets are significant and reflect multiple estimates and applications of judgement. Management exercises judgement in determining whether the costs related to exploration and evaluation are eligible for capitalization and whether they are likely to be recoverable by future exploration, which may be based on assumptions about future events and circumstances. Judgement and estimates are used when determining whether exploration and evaluation assets should be transferred to capital works in progress within property, plant and equipment. For mines in the production stage, management applies judgement to determine development costs to be capitalized based on the extent they are incurred in order to access reserves mineable over more than one year. For depreciable property, plant and equipment assets, management makes estimates to determine depreciation. For assets depreciated using the straight line method, residual value and useful lives of the assets or components are estimated. A significant estimate is required to determine the total production basis for units-of-production depreciation. The most currently available reserve and resource report is utilized in determining the basis which has material impacts on the amount of depreciation recorded through inventories and the consolidated income statements. There are numerous uncertainties inherent in estimating mineral reserves, and assumptions that were valid at the reporting date may change when new information becomes available. The actual volume of ore extracted and any changes in these assumptions could affect prospective depreciation rates and carrying values. In determining whether stripping costs incurred during the production phase of a mining property relate to mineral reserves and mineral resources that will be mined in a future period and therefore should be capitalized, Hudbay makes estimates of the proportion of stripping activity which relates to extracting current ore and the proportion which relates to obtaining access to ore reserves which will be mined in the future.

-Acquisition method accounting (notes 3a and 5) - Judgement was required to determine if the acquisition of UCM's 7.95% interest in the Rosemont project represented a business combination, or an asset purchase. Since it was concluded that the acquisition represented the purchase of assets, there was no goodwill generated on the transaction and acquisition costs were capitalized to the assets purchased rather than expensed.

-Tax provisions (notes 3o and 22) - Management makes estimates in determining the measurement and recognition of deferred tax assets and liabilities recorded on the consolidated balance sheets. The measurement of deferred tax assets and deferred tax liabilities is based on tax rates that are expected to apply in the period that the asset is realized or liability is settled based on tax rates that have been enacted or substantively enacted by the end of the reporting period. Deferred tax assets, including those arising from unutilized tax losses, require management to assess the likelihood of taxable income in the future periods in order to utilize recognized deferred tax assets. Estimates of future taxable income are based on forecasted cash flows from operations and the application of existing tax laws in each jurisdiction. To the extent that future cash flows and taxable income differ significantly from estimates, the ability to realize the net deferred tax assets recorded at the balance sheet date could be affected. At the end of each reporting period, management reassesses the period that the assets are expected to be realized or liabilities are settled and the likelihood of taxable income in future periods in order to support and adjust the deferred tax assets and deferred tax liabilities recognized on the consolidated balance sheets.

10

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

-Assaying utilized to determine revenue and recoverability of inventories (notes 3c and 3f) - Assaying of contained metal is a key estimate in determining the amount of revenues recorded in the consolidated income statements.  The estimate is finalized after final surveying is completed, which may extend to six months in certain transactions. Since assays are utilized to determine the value of recorded revenues, significant differences in given assays may result in a material misstatement of revenues on the consolidated income statements. Assay survey results are also a factor utilized to determine if inventories on hand have a net realizable value that exceeds cost. Material differences in assay results may lead to misstatements of inventory balances in the consolidated balance sheets.

-Decommissioning and restoration obligations (notes 3m and 19) - Significant judgement and estimates are utilized in the determination of the decommissioning and restoration provisions in the consolidated balance sheets. Judgement is involved in determining the timing and extent of cash outflows required to satisfy constructive obligations based on the timing of site closures in the LOM plans, expected unit costs to determine cash obligations to remediate disturbances and regulatory and constructive requirements to determine the extent of the remediation required. The timing of cash outflows and discount rates associated with discounting the provision are also key estimates. Changes in these estimates may result in a change in classification of the provision between non-current and current as well as material differences in the total provision recorded in the consolidated balance sheets.

-Pension and other employee benefit (notes 3l, 20 and 21) - Hudbay's post retirement obligations relate mainly to ongoing health care benefits plans. Hudbay estimates obligations related to the pension and other employee benefits plans using actuarial determinations that incorporate assumptions using management's best estimates of factors including plan performance, salary escalation, retirement dates of employees and drug cost escalation rates. Due to the complexity of the valuation, the underlying assumptions and its long term nature, the defined benefit obligation is highly sensitive to changes in these assumptions. Management reviews all assumptions at each reporting date. In determining the appropriate discount rate, Hudbay considers the interest rates on corporate bonds in the respective currency with at least an AA rating, with extrapolated maturities corresponding to the expected duration of the defined benefit obligation. The mortality rate is based on publicly available mortality tables for the specific country, and Hudbay bases future salary increases and pension increases on expected future inflation rates for the respective country.

3.Significant accounting policies

The accounting policies set out below have been applied consistently to all periods presented in these consolidated financial statements and by all Hudbay's entities.

a) Basis of consolidation:

Intercompany balances and transactions are eliminated upon consolidation. When a Hudbay entity transacts with an associate or jointly controlled entity of the Company, unrealized profits and losses are eliminated to the extent of Hudbay's interest in the relevant associate or joint venture. The accounting policies of Hudbay's entities are changed when necessary to align them with the policies adopted by the Company.

Subsidiaries

A subsidiary is an entity controlled by Hudbay. The financial statements of subsidiaries are included in the consolidated financial statements from the date that control commences until the date that control ceases.

11

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

Business combinations and goodwill

When Hudbay makes an acquisition, it first determines whether the assets acquired and liabilities assumed constitute a business, in which case the acquisition requires accounting as a business combination. Management applies judgement in determining whether the acquiree is capable of being conducted and managed for the purpose of providing a return, considering the inputs of the acquiree and processes applied to those inputs that have the ability to create outputs.

Hudbay applies the acquisition method of accounting to business combinations, whereby the goodwill is measured at the acquisition date as the fair value of the consideration transferred including the recognized amount of any non-controlling interests in the acquiree. When the excess is negative, a bargain purchase gain is recognized immediately in the consolidated income statements. The assessment of fair values on acquisition includes those mineral reserves and resources that are able to be reliably measured. In determining these fair values, management must also apply judgement in areas including future cash flows, metal prices, exchange rates and appropriate discount rates. Changes in such estimates and assumptions could result in significant differences in the amount of goodwill recognized.

The consideration transferred is the aggregate of the fair values, at the date of the acquisition, of the sum of the assets transferred, the liabilities incurred or assumed, and the equity instruments issued by the acquirer in exchange for control of the acquiree. Acquisition-related costs are recognized in the consolidated income statements as incurred, unless they relate to issuance of debt or equity securities.

Where applicable, the consideration transferred includes any asset or liability resulting from a contingent consideration arrangement and measured at its acquisition date fair value. Subsequent changes in such fair values are adjusted against the cost of acquisition where they qualify as measurement period adjustments. All other subsequent changes in the fair value of contingent consideration classified as an asset or liability are accounted for in accordance with relevant IFRS. Changes in the fair value of contingent consideration classified as equity are not recognized.

Where a business combination is achieved in stages, the Company's previously held interests in the acquired entity are remeasured to fair value at the acquisition date, which is the date Hudbay attains control, and any resulting gain or loss is recognized in the consolidated income statements. Amounts previously recognized in other comprehensive income ("OCI") related to interests in the acquiree prior to the acquisition date are reclassified to the consolidated income statements, where such treatment would be appropriate if that interest were disposed of.

After initial recognition, goodwill is measured at cost less any accumulated impairment losses. For the purpose of impairment testing, goodwill acquired in a business combination is, from the acquisition date, allocated to each of Hudbay's CGUs that are expected to benefit from the synergies of the combination, irrespective of whether other assets or liabilities of the acquiree are assigned to those units. Goodwill is allocated to the lowest level at which it is monitored for internal management purposes and is not larger than an operating segment before aggregation. Where goodwill forms part of a CGU and part of the operation within that unit is disposed of, the goodwill associated with the disposed operation is included in the determination of any gain or loss on disposal.

Goodwill is not amortized and is tested for impairment annually and whenever there is an indication of impairment. If any such indication exists, the recoverable amount of the CGU is estimated in order to determine the extent of the impairment, if any. The recoverable amount is determined as the higher of fair value less direct costs to sell and the CGU's value in use. An impairment loss in respect of goodwill is not reversed.

Fair value for mineral interests and related goodwill is generally determined as the present value of the estimated future cash flows expected to arise from the continued use of the asset, including any expansion prospects, and its eventual disposal, using assumptions that an independent market participant may take into account.

12

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

Value in use is determined as the present value of the estimated future cash flows expected to arise from the continued use of the asset in its present form and its eventual disposal. Value in use is determined by applying assumptions specific to Hudbay's continued use and cannot take into account future development.

The weighted average cost of capital of Hudbay or comparable market participants is used as a starting point for determining the discount rates, with appropriate adjustments for the risk profile of the countries in which the individual CGUs operate and the specific risks related to the development of the project.

Where the asset does not generate cash flows that are independent of other assets, Hudbay estimates the recoverable amount of the CGU to which the asset belongs. If the carrying amount of an asset or CGU exceeds its recoverable amount, the carrying amount of the asset or CGU is reduced to its recoverable amount. An impairment loss is recognized as an expense in the consolidated income statements.

b) Translation of foreign currencies:

Management determines the functional currency of each Hudbay entity as the currency of the primary economic environment in which the entity operates.

Foreign currency transactions

Transactions in foreign currencies are translated to the respective functional currencies of Hudbay's entities at exchange rates in effect at the transaction dates.

At the end of each reporting period, monetary assets and liabilities denominated in foreign currencies are translated to the functional currency using the closing exchange rate. Non-monetary assets and liabilities measured at fair value are translated using the exchange rates at the date when fair value was determined. Non-monetary assets and liabilities measured at historical cost in a foreign currency are translated using exchange rates that were in effect at the transaction dates. The same translations are applied when an entity prepares its financial statements from books and records maintained in a currency other than its functional currency, except revenue and expenses may be translated at monthly average exchange rates that approximate those in effect at the transaction dates.

Foreign currency gains and losses arising on period-end revaluations are recognized in the consolidated income statements, except for a financial liability designated as a hedge of a net investment in a foreign operation, or qualifying cash flow hedges, which are recognized in OCI.

Foreign operations

For the purpose of the consolidated financial statements, assets and liabilities of Hudbay's entities that have functional currencies other than the US dollar are translated to US dollars at the reporting date using the closing exchange rate. Revenue and expenses are translated at monthly average exchange rates that approximate those in effect at the transaction dates. Differences arising from these foreign currency translations are recognized in OCI and presented within equity in the foreign currency translation reserve. When a foreign operation is disposed, the relevant exchange differences accumulated in the foreign currency translation reserve are transferred to the consolidated income statements as part of the profit or loss on disposal. On the partial disposal of a subsidiary that includes a foreign operation, the relevant proportion of such amount is reattributed to non-controlling interests. On disposal of a partial investment in an associate or joint venture that includes a foreign operation while retaining significant influence or joint control, the relevant proportion is reclassified to profit or loss.

Net investment in a foreign operation

Foreign currency gains and losses arising on translation of a monetary item receivable from or payable to a foreign operation for which settlement is neither planned nor likely to occur in the foreseeable future are considered to form part of a net investment in the foreign operation. Such gains and losses are recognized in OCI and presented within equity in the foreign currency translation reserve.

13

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

c) Revenue recognition:

Revenue from the sale of goods is measured at the fair value of the consideration received or receivable, net of treatment and refining charges and pre-production revenue. Revenue from the sale of by-products is included within revenue.

Revenue is recognized when control of the goods sold has been transferred to the buyer. Control is deemed to have passed to the customer when significant risk and reward of the product has passed to the buyer, Hudbay has a present right to payment and physical possession of the product has been transferred to the buyer. Sale of concentrate and finished zinc frequently occur under the following terms, and management has assessed these terms in order to determine timing of transfer of control.

Incoterms used by Hudbay	Revenue recognized when goods:
Cost, Insurance and Freight (CIF)	Are loaded on board the vessel
Free on Board (FOB)	Are loaded on board the vessel
Delivered at place (DAP)	Arrive at the named place of destination
Delivered at terminal (DAT)	Arrive at the named place of destination
Free Carrier (FCA)	Arrive at the named place of delivery

Sales of concentrate and certain other products are provisionally priced. For these contracts, sales prices are subject to final adjustment at the end of a future period after shipment, based on quoted market prices during the quotational period specified in the contract. Revenue is recognized when the above criteria are achieved, using weight and assay results and forward market prices to estimate the fair value of the total consideration receivable. Therefore, revenue is initially recorded based on an initial provisional invoice. Subsequently, at each reporting date, until the provisionally priced sale is finalized, sales receivables are marked to market, with adjustments (both gains and losses) recorded within revenue separately as "Pricing and volume adjustments" in the notes to the consolidated financial statements and in trade and other receivables on the consolidated balance sheets. As per IFRS 15 Revenue, variability in price is deemed to be fair value movements on provisionally priced receivables under the scope of IFRS 9 Financial Instruments; variability in quantities is deemed to be variable consideration. The variable consideration from weights and assay changes to quantities has been assessed to be insignificant to warrant precluding revenue being recorded as a result of possible future sales reversals. An annual analysis of the accuracy of our weights and assays is completed, and if the accuracy rate falls below a certain threshold, management then evaluates whether revenue from future sales should be constrained as a result of it being highly probable that there would be a significant revenue reversal in the future.

Hudbay only includes in the transaction price an amount which is not highly likely to be subject to significant subsequent revenue reversal. Within sales contracts with customers, separate performance obligations may arise pertaining to the shipping of goods sold. If applicable, costs and the transaction price are allocated on a relative standalone selling basis to any separate performance obligations and are recognized over the period of time the goods sold are shipped, on a gross basis.

Hudbay recognizes deferred revenue in the event it receives payments from customers before a sale meets criteria for revenue recognition. There is a significant financing component associated with the Company's precious metal streaming arrangements since funds were received in advance of the delivery of concentrate. When a significant financing component is recognized, finance expense will be higher and revenues will be higher as the larger deferred revenue balance is amortized to revenues. A market-based discount rate is utilized at the inception of each of the respective stream agreements to determine a discount rate for computing the interest charges for the significant financing component of the deferred revenue balance. As product is delivered, the deferred revenue amount including accreted interest will be drawn down. The draw down rate requires the use of proven and probable reserves and certain resources in the calculation that are beyond proven and probable reserves which management is reasonably confident will be transferable to reserves. Key estimates used in determining the significant financing component include the discount rate and the reserve and resources assumed for conversion.

14

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

d) Cost of sales:

Cost of sales consists of those costs previously included in the measurement of inventory sold during the period, as well as certain costs not included in the measurement of inventory, such as the cost of warehousing and distribution to customers, provisional pricing adjustments related to purchased concentrates, profit sharing, royalty payments, share-based compensation expense and other indirect expenses related to producing operations.

e) Cash and cash equivalents:

Cash and cash equivalents include cash, demand deposits and short-term, highly liquid investments that are readily convertible to known amounts of cash and are subject to an insignificant risk of changes in value. Cash equivalents have maturities of three months or less at the date of acquisition. Interest earned is included in finance income on the consolidated income statements and in investing activities on the consolidated statements of cash flows.

Amounts that are restricted from being used for at least twelve months after the reporting date are classified as non-current assets and presented in restricted cash on the consolidated balance sheets. Changes in restricted cash balances are classified as investing activities on the consolidated statements of cash flows.

f) Inventories:

Inventories consist of stockpiles, in-process inventory (concentrates and metals), metal products and supplies. Concentrates, metals and all other saleable products are valued at the lower of cost and estimated net realizable value. Net realizable value represents the estimated selling price for inventories less all estimated costs of completion and costs necessary to make the sale. Where the net realizable value is less than cost, the difference is charged to the consolidated income statements as an impairment charge in cost of sales. Costs associated with stripping activities in an open pit mine are capitalized to inventory and recorded through cost of sales unless the stripping activity can be shown to improve access to further quantities of ore that will be mined in future periods, in which case, the stripping costs are capitalized to property, plant and equipment.

Cost of production of concentrate inventory is determined on a weighted average cost basis and the cost of production of finished metal inventory is determined using the first in first out basis. The cost of production includes direct costs associated with conversion of production inventory based on normal production capacity: material, labour, contractor expenses, purchased concentrates, and an attributable portion of production overheads and depreciation of all property, plant and equipment involved with the mining and production process. Hudbay measures in-process inventories based on assays of material received at metallurgical plants and estimates of recoveries in the production processes. Due to significant uncertainty associated with volume and metal content, immaterial costs are not allocated to routine operating levels of stockpiled ore. Estimates and judgements are required to assess the nature of any significant changes to levels of ore stockpiles and determining whether allocation of costs is required.

Supplies are valued at the lower of average cost and net realizable value.

g) Intangible assets:

Computer software is measured at cost less accumulated amortization and accumulated impairment losses. Costs include all directly attributable costs necessary to create, produce and prepare the asset to be capable of operating it in the manner intended by management.

Amortization methods, useful lives, and residual values if any, are reviewed at each year end and adjusted prospectively, if required. When an intangible asset is disposed of, or when no further economic benefits are expected, the asset is derecognized, and any resulting gain or loss is recorded in the consolidated income statements.

15

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

Currently, the Company's intangible assets relate primarily to enterprise resource planning ("ERP") information systems, which are amortized over their estimated useful lives.

h) Exploration and evaluation expenditures:

Exploration and evaluation activity begins when Hudbay obtains legal rights to explore a specific area and involves the search for mineral reserves, the determination of technical feasibility, and the assessment of commercial viability of an identified resource. Expenditures incurred in the exploration and evaluation phase include the cost of acquiring interests in mineral rights, licenses and properties and the costs of Hudbay's exploration activities, such as researching and analyzing existing exploration data, gathering data through geological studies, exploratory drilling, trenching, sampling, and certain feasibility studies.

Hudbay expenses the cost of its exploration and evaluation activities and capitalizes the cost of acquiring interests in mineral rights, licenses and properties in business combinations, asset acquisitions or option agreements. Amounts capitalized are recognized as exploration and evaluation assets and presented in property, plant and equipment. Exploration and evaluation assets acquired as a result of an asset acquisition or option agreement are initially recognized at cost, and those acquired in a business combination are recognized at fair value on the acquisition date. They are subsequently carried at cost less accumulated impairment. No depreciation is charged during the exploration and evaluation phase. Hudbay expenses the cost of subsequent exploration and evaluation activity related to acquired exploration and evaluation assets. Cash flows associated with acquiring exploration and evaluation assets are classified as investing activities in the consolidated statements of cash flows; those associated with exploration and evaluation expenses are classified as operating activities.

Judgement is required in determining whether the respective costs are eligible for capitalization where applicable, and whether they are likely to be recoverable, which may be based on assumptions about future events and circumstances. Estimates and assumptions made may change if new information becomes available.

Hudbay monitors exploration and evaluation assets for factors that may indicate their carrying amounts are not recoverable. If such indicators are identified, the Company tests the exploration and evaluation assets or their CGUs, as applicable, for impairment. Hudbay also tests for impairment when assets reach the end of the exploration and evaluation phase.

Exploration and evaluation assets are transferred to capital works in progress within property, plant and equipment once the Company determines that probable future economic benefits will be generated as a result of the expenditures. Hudbay's determination of probable future economic benefit is based on management's evaluation of the technical feasibility and commercial viability of the geological properties of a given ore body based on information obtained through evaluation activities, including metallurgical testing, resource and reserve estimates and the economic assessment of whether the ore body can be mined economically. Tools that may be used to determine this include a preliminary feasibility study, confidence in converting resources into reserves and the probability that the property could be developed into a mine site. At that time, the property is considered to enter the development phase, and subsequent evaluation costs are capitalized.

(i) Property, plant and equipment:

Hudbay measures items of property, plant and equipment at cost less accumulated depreciation and any accumulated impairment losses.

The initial cost of an item of property, plant and equipment includes its purchase price or construction costs, including import duties and non-refundable purchase taxes, any costs directly attributable to bringing the asset into operation, and for qualifying assets, borrowing costs. The initial cost of property, plant and equipment also includes the initial estimate of the cost of dismantling and removing the item and restoring the site on which it is located, the obligation which Hudbay incurs either when the item is acquired or as a consequence of having used the item during a particular period for purposes other than to produce inventories during that period.

16

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

Capitalization of costs ceases once an asset is in the location and condition necessary for it to be capable of operating in the manner intended by management. At this time, depreciation commences. For a new mine, this occurs upon commencement of commercial production. Up to and including December 31, 2020, any revenue earned in the process of preparing an asset to be capable of operating in the manner intended by management is included in the cost of the constructed asset. Any other incidental revenue earned prior to commencement of commercial production is recognized in the consolidated income statements.

Carrying amounts of property, plant and equipment, including right-of-use ("ROU") assets, are depreciated to their estimated residual value over the estimated useful lives of the assets or the estimated life of the related mine or plant, if shorter. Where components of an asset have different useful lives, depreciation is calculated on each separate component. Components may be physical or non-physical, including the cost of regular major inspections and overhauls required in order to continue operating an item of property, plant and equipment.

Certain items of property, plant and equipment are depreciated on a unit-of-production basis. The unit-of-production method is based on proven and probable tonnes of ore reserves. There are numerous uncertainties inherent in estimating ore reserves, and assumptions that were valid at the reporting date may change when new information becomes available. The actual volume of ore extracted and any changes in these assumptions could affect prospective depreciation rates and carrying values.

The carrying amount of an item of property, plant and equipment is derecognized on disposal or when no future economic benefits are expected from its use or disposal. Upon derecognition of an item of property, plant and equipment, the difference between its carrying value and net sales proceeds, if any, is presented as a gain or loss in other operating income or expense in the consolidated income statements.

i.Capital works in progress:

Capital works in progress consist of items of property, plant and equipment in the course of construction or mineral properties in the course of development, including those transferred upon completion of the exploration and evaluation phase. On completion of construction or development, costs are transferred to plant and equipment and/or mining properties as appropriate. Capital works in progress are not depreciated.

ii.Mining properties:

Mining properties consist of costs transferred from capital works in progress when a mining property reaches commercial production, costs of subsequent mine and exploration development, and acquired mining properties in the production stage.

Mining properties include costs directly attributable to bringing a mineral asset into the state where it is capable of operating in the manner intended by management and includes such costs as the cost of shafts, ramps, track haulage drifts, ancillary drifts, pumps, electrical substations, refuge stations, ventilation raises, permanent manways, and ore and waste pass raises. The determination of development costs to be capitalized during the production stage of a mine operation requires the use of judgements and estimates such as estimates of tonnes of waste to be removed over the life of the mining area and economically recoverable reserves extracted as a result.

A mining property is considered to be capable of operating in a manner intended by management when it commences commercial production based on pre-established criteria. Upon commencement of commercial production, a mining property is depreciated on a unit-of-production method. Unit-of-production depreciation rates are determined based on the related proven and probable mineral reserves and associated future development costs.

17

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

Subsequent mine development costs are capitalized to the extent they are incurred in order to access reserves mineable over more than one year. Ongoing maintenance and development expenditures are expensed as incurred and included in cost of sales in profit or loss. These include ore stope access drifts, footwall and hangingwall drifts in stopes, drawpoints, drill drifts, sublevels, slots, drill raises, stope manway access raises and definition diamond drilling.

iii.Plant and equipment:

Plant and equipment consists of buildings and fixtures, surface and underground fixed and mobile equipment and assets under lease.

Plant and equipment are depreciated on either unit-of-production or straight-line basis based on factors including the production life of assets and mineable reserves. In general, mining assets are depreciated using a unit-of-production method; equipment is depreciated using the straight-line method, based on the shorter of its useful life and that of the related mine or facility; and plants are depreciated using the straight-line method, with useful lives limited by those of related mining assets.

iv.Right-of-use lease assets:

At inception of a contract, Hudbay assesses whether a contract is, or contains, a lease. A contract is, or contains, a lease if the contract conveys the right to control the use of an identified asset for a period of time in exchange for consideration. The Company assesses the following criteria in the determination of whether a contract conveys the right to control the use of an identified asset:

•The contract involves the use of an identified asset - this may be specified explicitly or implicitly, and should be physically distinct or represent substantially all of the capacity of a physically distinct asset. If the supplier has substantive substitution rights, then the asset is not identified;

•Hudbay has the right to obtain substantially all of the economic benefits from use of the asset throughout the period of use; and

•Hudbay has the right to direct the use of the asset by means of decision making rights that are most relevant to changing how and for what purpose the asset is used. In the case where decisions about the asset's purpose is predetermined, Hudbay is deemed to have the right to direct the use of the asset if either:

▪Hudbay has the right to operate the asset; or,

▪Hudbay designed the asset in a way that predetermines how and for what purpose it will be used.

The Company recognizes a ROU asset and lease liability at the lease commencement date. The initial measurement of the ROU asset is on a present value basis. This is based on the calculated lease liability plus any initial direct costs incurred, an estimate of removal or restoration costs, and any payments made prior to commencement of the lease less any lease incentives received.

The right of use asset is subsequently depreciated using the straight-line method from the commencement date to the earlier of the end of the useful life of the right-of-use asset or the end of the lease term. The estimated useful lives of the right-of-use assets are determined on the same basis as those of property and equipment. In addition, the right-of-use asset is periodically reduced by impairment losses, if any, and adjusted for certain remeasurements of the lease liability.

The lease liability is measured at the present value of the lease payments that are yet to be paid at the commencement date, discounted using the interest rate implicit in the lease or, if that rate cannot be easily determined, Hudbay's incremental borrowing rate. Generally, the Company uses its incremental borrowing rate as the discount rate for applicable leases.

18

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

Lease payments included in the measurement of the lease liability comprise fixed payments including in substance fixed payments and variable payments that depend on an index or rate, amounts expected to be payable under a residual value guarantee and the additional costs Hudbay reasonably expects to incur due to purchase options, extension options and termination options reasonably expected to be exercised.

The lease liability is measured at amortized cost using the effective interest method. It is remeasured when there is a change in the expected future cash flows of a leasing contract either due to a change in index or rate, or due to a change in terms of the contract. When the lease liability is remeasured in this way, a corresponding adjustment is made to the carrying amount of the right-of-use asset, or is recorded in profit or loss if the carrying amount of the right-of-use asset is zero.

Hudbay has elected not to separate non-lease components and account for the lease and non-lease components as a single lease component for lease contracts of all asset classes.

The Company has elected not to recognize ROU assets and lease liabilities for short-term leases of machinery that have a lease term of 12 months or less and leases of low-value assets. Hudbay recognizes the lease payments associated with these leases as an expense on a straight-line basis over the lease term.

Hudbay does not enter into transactions where the Company acts as a lessor.

The incremental borrowing rate used for new ROU leases is a key management judgement.

v.Depreciation rates of major categories of assets:

•	Capital works in progress		- not depreciated
•	Mining properties		- unit-of- production
•	Mining asset		- unit-of- production
•	Plant and Equipment
	◦	Equipment	- straight-line over 1 to 20 years
	◦	Other plant assets	- straight-line over 1 to 20 years/unit-of-production
•	ROU Assets		- straight -line over 1 to 20 years

Hudbay reviews its depreciation methods, remaining useful lives and residual values at least annually and accounts for changes in estimates prospectively.

vi.Commercial production:

Commercial production is the level of activities intended by management for a mine, or a mine and mill complex, to be capable of operating in the manner intended by management. Hudbay considers a range of factors when determining the level of activity that represents commercial production for a particular project, including a predetermined percentage of design capacity for the mine and mill; achievement of continuous production, ramp-ups, or other output; or specific factors such as recoveries, grades, or inventory build-ups. In a phased mining approach, management may consider achievement of specific milestones at each phase of completion. In a non-phased mining approach, management considers average actual metrics that are at least 60% of average design capacity or plan over a continuous period. Management assesses the operation's ability to sustain production over a period of approximately one to three months, depending on the complexity related to the stability of continuous operation. Commercial production is considered to have commenced, and depreciation expense is recognized, at the beginning of the month after criteria have been met.

19

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

vii.Capitalized borrowing costs:

The Company capitalizes borrowing costs that are directly attributable to the acquisition, construction or production of qualifying assets, which are assets that necessarily take a substantial period of time, generally one year or more, to get ready for their intended use or sale. Capitalization of borrowing costs ceases once the qualifying assets commence commercial production or are otherwise ready for their intended use or sale.

Where funds are borrowed specifically to finance a project, the amount capitalized represents the actual borrowing costs incurred. Where the funds used to finance a project form part of general borrowings, the amount capitalized is calculated using a weighted average of interest rates applicable to relevant general borrowings of Hudbay during the period, to a maximum of actual borrowing costs incurred. Investment income earned by temporarily investing specific borrowings pending their expenditure on qualifying assets is deducted from the borrowing costs eligible for capitalization. Capitalization of interest is suspended during extended periods in which active development is interrupted.

All other borrowing costs are recognized in the consolidated income statements in the period in which they are incurred.

viii.Capitalized stripping costs:

Costs associated with stripping activities in an open pit mine are capitalized to inventory and recorded through cost of sales unless the stripping activity can be shown to improve access to further quantities of ore that will be mined in future periods, in which case, the stripping costs are capitalized to property, plant and equipment. Capitalized stripping costs are included in "mining properties" within property, plant and equipment.

Capitalized stripping costs are depreciated using a units-of-production method over the expected reserves within a given phase of mine development.

(j) Impairment of non-financial assets:

At the end of each reporting period, Hudbay reviews the carrying amounts of property, plant and equipment, exploration and evaluation assets and intangible assets - computer software to determine whether there is any indication of impairment. If any such indication exists, the Company estimates the recoverable amount of the asset in order to determine the extent of the impairment loss, if any. Hudbay generally assesses impairment at the level of CGUs, which are the smallest identifiable groups of assets that generate cash inflows that are largely independent of cash inflows from other assets.

Hudbay's CGUs consist of Manitoba, Peru, Arizona and greenfield exploration and evaluation assets.

The Company allocates near mine exploration and evaluation assets to CGUs based on their operating segment, geographic location and management's intended use for the property. Near mine exploration and evaluation assets are allocated to CGUs separate from those containing producing or development-phase assets, except where such exploration and evaluation assets have the potential to significantly affect the future production of producing or development-phase assets.

Goodwill, if recorded, is tested for impairment annually and whenever there is an indication that the asset may be impaired.

Where an indicator of impairment exists, a formal estimate of the recoverable amount of the asset or CGU is made. The recoverable amount is the higher of the fair value less costs of disposal and value in use:

-Fair value less costs of disposal is the amount obtainable from the sale of the asset or CGU in an arm's length transaction between knowledgeable, willing parties, less costs of disposal. Fair value for mineral assets is often determined as the present value of the estimated future cash flows expected to arise from the continued use of the asset, including any expansion prospects, and its eventual disposal, using assumptions that an independent market participant may take into account. These cash flows are discounted by an appropriate discount rate that reflects current market assessments of the time value of money and the risks specific to the asset to arrive at a net present value of the asset.

20

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

-Value in use is determined as the present value of the estimated future cash flows expected to arise from the continued use of the asset or CGU in its present form and its eventual disposal, discounted using a pre-tax rate that reflects current market assessments of the time value of money and risks specific to the asset for which estimates of future cash flows have not been adjusted. Value in use calculations apply assumptions specific to the Company's continued use and cannot take into account future development. These assumptions are different to those used in calculating fair value, and consequently the value in use calculation is likely to give a different result to a fair value calculation.

Hudbay estimates future cash flows based on estimated future recoverable mine production, expected sales prices (considering current and historical commodity prices, price trends and related factors), production levels and cash costs of production, all based on detailed engineering LOM plans. Future recoverable mine production is determined from reserves and resources after taking into account estimated dilution and recoveries during mining, and estimated losses during ore processing and treatment. Estimates of recoverable production from measured, indicated and inferred mineral resources not included in the LOM plan are assessed for economic recoverability and may also be included in the valuation of fair value less costs of disposal. Gains from the expected disposal of assets are not included in estimated future cash flows. Assumptions underlying future cash flow estimates are subject to risks and uncertainties. Changes in estimates may affect the expected recoverability of the Company's investments in mining properties.

If the carrying amount of an asset or CGU exceeds its recoverable amount, the carrying amount is reduced to the recoverable amount, and an impairment loss is recognized in the consolidated income statements in the expense category consistent with the function of the impaired asset or CGU. Hudbay presents impairment losses on the consolidated income statements as part of results from operating activities. Impairment losses recognized in respect of a CGU are allocated first to reduce the carrying amount of any goodwill allocated to the CGU and then to reduce the carrying amounts of other assets in the CGU on a pro-rata basis for depreciable assets.

The Company assesses previously recognized impairment losses each reporting date for any indications that the losses have decreased or no longer exist. Such an impairment loss is reversed, in full or in part, if there have been significant changes with a positive effect on the estimates used to determine the recoverable amount. An impairment loss is reversed only to the extent that the asset's carrying amount does not exceed the carrying amount that would have been determined, net of depreciation or amortization, if no impairment loss had been recognized for the asset in prior years. Such reversals of impairment losses are recognized in the consolidated income statements. An impairment loss recognized in relation to goodwill is not reversed for subsequent increases in the recoverable amount.

(k) Assets held for sale:

The Company classifies non-current assets, or disposal groups consisting of assets and liabilities, as held for sale when it expects to recover their carrying amounts primarily through sale rather than through continuing use. To meet criteria to be held for sale, the sale must be highly probable, and the assets or disposal groups must be available for immediate sale in their present condition. Hudbay must be committed to a plan to sell the assets or disposal group, and the sale should be expected to qualify for recognition as a completed sale within one year from the date of classification.

The Company measures assets or disposal groups at the lower of their carrying amount and fair value less costs of disposal. Impairment losses on initial classification as held for sale and subsequent gains and losses on remeasurement are recognized in the consolidated income statements; however, gains are not recognized in excess of any cumulative impairment loss. Any impairment loss on a disposal group first is allocated to goodwill, and then to remaining assets and liabilities on pro rata basis, except that no loss is allocated to inventories, financial assets, deferred tax assets, employee benefit assets or investment property. Upon classifying assets or disposal groups as held for sale, Hudbay presents the assets separately as a single amount and the liabilities separately as a single amount on the consolidated balance sheets. When an asset no longer meets the criteria for classification as an asset held for sale, the Company records the asset at the lower of its recoverable amount and the carrying amount before the asset was classified as held for sale.

21

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

(l) Pension and other employee benefits:

Hudbay has non-contributory and contributory defined benefit programs for the majority of its Canadian employees. The defined benefit pension benefits are based on years of service and final average salary for the salaried plans and are based on a flat dollar amount combined with years of service for the hourly plans. The Company provides non pension health and other post-employment benefits to certain active employees and pensioners (post-employment benefits) and also provides disability income, health benefits and other post-employment benefits to hourly and salaried disabled employees (other long-term employee benefits).

Hudbay accrues its obligations under the defined benefit plans as the employees render the services necessary to earn the pension and post-employment benefits. The actuarial determination of the accrued benefit obligations for pensions and post-employment benefits uses the projected benefit method pro-rated on service (which incorporates management's best estimate of future salary levels, other cost escalation, retirement ages of employees and other actuarial factors). For other long-term employee benefits, the Company recognizes the full cost of the benefit obligation at the time the employee becomes disabled. Actuarial advice is provided by external consultants.

For the funded defined benefit plans, Hudbay recognizes the deficit or excess of the fair value of plan assets over the present value of the defined benefit obligation as a liability or an asset in the consolidated balance sheets. However, the Company recognizes an excess of assets only to the extent that it represents a future economic benefit which is available in the form of refunds from the plan or reductions in future contributions to the plan. When these criteria are not met, it is not recognized but is disclosed in the notes to the consolidated financial statements. Impacts of minimum funding requirements in relation to past service are considered when determining the balance sheet position.

Defined benefit costs are categorized as follows:

-Service costs (including current service cost, past service cost, as well as gains and losses on curtailments and settlements and administration costs),

-Net interest expense or income; and,

-Remeasurement.

The first two components of defined benefit costs shown above are recognized in the consolidated income statements. Past service cost is recognized in the consolidated income statements in the period of a plan amendment. Net interest is calculated by applying the discount rate at the beginning of the period to the net defined benefit liability or asset.

Remeasurement, comprising actuarial gains and losses, the effect of changes to the asset ceiling (if applicable) and the return on plan assets (excluding interest), is reflected immediately in the consolidated balance sheets with a gain or loss recognized in OCI in the period in which they occur. Remeasurement recognized in OCI is reflected in the remeasurement reserve and will not be reclassified to the consolidated income statements. For the other long-term employee benefits plan, remeasurements are recognized immediately in the consolidated income statements.

Actuarial determinations used in estimating obligations relating to these plans incorporate assumptions using management's best estimates of factors including plan performance, salary escalation, retirement dates of employees and healthcare cost escalation rates. Due to the complexity of the valuation, the underlying assumptions and its long-term nature, a defined benefit obligation is highly sensitive to changes in these assumptions. All assumptions are reviewed at each reporting date. In determining the appropriate discount rate, management considers the interest rates on corporate bonds in the respective currency with at least an AA rating, with extrapolated maturities corresponding to the expected duration of the defined benefit obligation. The mortality rate is based on publicly available mortality tables for the specific country. Future salary increases and pension increases are based on expected future inflation rates for the respective country.

22

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

Hudbay also has defined contribution plans providing pension benefits for certain of its salaried employees and certain of its US employees utilizing 401K plans. The Company recognizes the cost of the defined contribution plans based on the contributions required to be made during each period.

Termination benefits are recognized as an expense when Hudbay is committed demonstrably, without realistic possibility of withdrawal, to a formal detailed plan to either terminate employment before the normal retirement date, or to provide termination benefits as a result of an offer made to encourage voluntary redundancy. Termination benefits for voluntary redundancies are recognized as an expense if the Company has made an offer of voluntary redundancy, it is probable that the offer will be accepted, and the number of acceptances can be estimated reliably. Benefits that are payable more than one year after the reporting period are discounted to their present value.

(m) Provisions:

Provisions are recognized when Hudbay has a present obligation (legal or constructive) as a result of a past event, it is probable that an outflow of resources will be required to settle the obligation, and a reliable estimate can be made. The provisions are recorded as management's best estimate of the amount required to settle an obligation.

Provisions are stated at their present value, which is determined by discounting the expected future cash flows at a pre-tax rate that reflects current market assessments of the time value of money and the risks specific to the liability.

Decommissioning, restoration and similar liabilities

Provisions are recorded for legal and constructive obligations associated with the future costs of rehabilitating the Company's current and previous operating and development sites. Such costs are associated with decommissioning and restoration activities such as dismantling and removing structures, rehabilitating mines and tailings, and reclamation and re-vegetation of affected areas.

The present value of estimated costs is recorded in the period in which the asset is installed or the environment is disturbed and a reasonable estimate of future costs and discount rates can be made. The provision is discounted using a risk-free rate, and estimates of future cash flows are adjusted to reflect risk.

Subsequent to the initial measurement, the obligation is adjusted to reflect the passage of time and changes in the estimated future cash flows underlying the obligation. The increase in the provision due to the passage of time is recognized as finance expense, whereas increases and decreases due to changes in the estimated future cash flows, which are not the result of current inventory production, are capitalized and depreciated over the life of the related asset. Actual costs incurred upon settlement of the site restoration obligation are charged against the provision to the extent the provision was established for those costs. Upon settlement of the liability, a gain or loss may be recorded. For closed sites, changes to estimated costs are recognized immediately in the consolidated income statements within other operating expenses.

Hudbay assesses the reasonableness of its estimates and assumptions each year and when conditions change, the estimates are revised accordingly. Judgement is required to determine the scope of future decommissioning and restoration activities, as well as best available estimates and assumptions including discount rates, expected timing of decommissioning and restoration costs, inflationary factors and market risks. Changes in cost estimates, which may arise from changes in technology and pricing of the individual components of the cost may result in offsetting changes to the asset and liability and corresponding changes to the associated depreciation and finance costs. In view of the uncertainties concerning these future obligations, the ultimate timing and cost of reclamation and mine closure may differ materially from these estimates.

23

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

If the change in estimate results in a significant increase in the decommissioning liability and therefore an addition to the carrying value of the asset, the Company considers whether this is an indication of impairment of the asset as a whole and, if so, tests for impairment in accordance with IAS 36, Impairment of Assets. If, for mature mines, the revised mine assets net of decommissioning and restoration liabilities exceeds the recoverable value, that portion of the increase is charged directly to expense as an impairment loss.

In view of the uncertainties concerning environmental remediation, the ultimate cost of decommissioning and restoration liabilities could differ materially from the estimated amounts provided. The estimate of the total liability is subject to change based on amendments to laws and regulations and as new information concerning Hudbay's operations becomes available. Future changes, if any, to the estimated total liability as a result of amended requirements, laws, regulations and operating assumptions, as well as discount rates, may be significant and would be recognized prospectively as a change in accounting estimate, when applicable. Environmental laws and regulations are continually evolving in all regions in which the Company operates. Hudbay is not able to determine the impact, if any, of environmental laws and regulations that may be enacted in the future on its results of operations or financial position due to the uncertainty surrounding the ultimate form that such future laws and regulations may take.

Onerous contracts

A contract is considered to be onerous when the unavoidable costs of meeting obligations under the contract exceed the economic benefits expected to be received under it. Hudbay records a provision for any onerous contracts at the lesser of costs to comply with a contract and costs to terminate it.

Restructuring provisions

A provision for restructuring is recognized when management, with appropriate authority within Hudbay, has approved a detailed and formal restructuring plan, and the restructuring has either commenced or has been announced publicly. Future operating costs are not provided for.

(n) Financial instruments:

Non-derivative financial instruments are initially recognized at fair value plus, in the case of a financial asset or financial liability not measured at fair value through profit or loss, directly attributable transaction costs. Measurement in subsequent periods depends on the financial instrument's classification. Hudbay uses trade date accounting for regular way purchases or sales of financial assets. The Company determines the classification of its financial instruments and non-financial derivatives at initial recognition.

Financial assets and liabilities are offset and the net amount presented in the consolidated balance sheets when, and only when, Hudbay has a legal right to offset the amounts and intends either to settle on a net basis or to realize the asset and settle the liability simultaneously.

The classification of financial assets is based on the results of the contractual characteristics test and the business model assessment which will result in the financial asset being classified as either: amortized cost, fair value through profit or loss ("FVTPL") or fair value through other comprehensive income ("FVTOCI").

i.Non-derivative financial instruments - classification:

Financial assets at fair value through profit or loss

Provisionally priced copper sales receivables, warrants and investments in securities of junior mining companies are classified as financial assets at fair value through profit or loss and are measured at fair value. The unrealized gains or losses related to changes in fair value are reported in other finance income/expense in the consolidated income statements.

24

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

Amortized cost

Cash, certain receivables, payables and restricted cash are classified as and measured at amortized cost and are carried at amortized cost using the effective interest rate method, less impairment losses, if any.

Non-derivative financial liabilities

Accounts payable and senior unsecured notes are initially recognized at fair value and subsequently accounted for at amortized cost, using the effective interest method. The amortization of senior unsecured notes issue costs is calculated using the effective interest rate method.

ii.Derivatives:

Derivatives are initially recognized at fair value when Hudbay becomes a party to the derivative contract and are subsequently re-measured to fair value at the end of each reporting period. The resulting gain or loss is recognized in the consolidated income statements immediately unless the derivative is designated and effective as a hedging instrument. Derivatives with positive fair value are recognized as assets; derivatives with negative fair value are recognized as liabilities.

Contracts to buy or sell non-financial items that meet the definition of a derivative but were entered into and are held in accordance with the Company's expected purchase, sale or usage requirements are not recognized as derivatives. Such contracts are recorded as non-derivative purchases and sales.

iii.Embedded derivatives:

Hudbay considers whether a contract contains an embedded derivative when it becomes a party to the contract. Derivatives embedded in other financial liabilities or other host contracts are treated as separate derivatives when their risks and characteristics are not closely related to those of the host contracts and the host contracts are not measured at FVTPL.

iv.Fair value of financial instruments:

The fair value of a financial instrument is the amount for which an asset could be exchanged, or a liability settled, between knowledgeable, willing parties in an arm's length transaction.

Fair values of financial instruments traded in active markets are determined based on quoted market prices, where available. Bid prices are generally used for assets held or liabilities to be issued; asking prices are generally used for assets to be acquired or liabilities held.

For financial instruments not traded in an active market, fair values are determined based on appropriate valuation techniques. Such techniques may include discounted cash flow analysis, using recent arm's length market transactions, reference to the current fair value of another instrument that is substantially the same, and other valuation models.

The Company applies a hierarchy to classify valuation methods used to measure financial instruments carried at fair value. Levels 1 to 3 are defined based on the degree to which fair value inputs are observable and have a significant effect on the recorded fair value, as follows:

-Level 1: Quoted prices (unadjusted) in active markets for identical assets or liabilities;

-Level 2: Valuation techniques use significant observable inputs, either directly (i.e. as prices) or indirectly (i.e. derived from prices), or valuations are based on quoted prices for similar instruments; and,

-Level 3: Valuation techniques use significant inputs that are not based on observable market data (unobservable inputs).

An analysis of fair values of financial instruments is provided in note 27.

25

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

v.Impairment of financial instruments:

Hudbay recognizes loss allowances for Expected Credit Losses ("ECL") for trade receivables not measured at FVTPL.

Loss allowances for trade receivables are measured at an amount equal to lifetime ECL. ECL is a probability-weighted estimate measured at the present value of all cash shortfalls including the impact of forward-looking information.

Hudbay has established a provision based on the Company's historical credit loss experience, adjusted for forward-looking factors specific to the debtors and the economic environment.

The loss allowance is presented as a deduction to trade receivables in the balance sheets.

vi.Derecognition of financial instruments:

Hudbay derecognizes financial assets when the contractual rights to the cash flows from the assets expire, or when the Company transfers the rights to receive the contractual cash flows on the financial assets in a transaction in which substantially all the risks and rewards of ownership of the financial asset are transferred. Any interest in the transferred financial assets that is created or retained by Hudbay is recognized as a separate asset or liability.

Hudbay derecognizes financial liabilities when its contractual obligations are discharged, cancelled or expire or when its terms are modified and the cash flows of the modified liability are substantially different.

(o) Taxation:

Current Tax

Current income tax assets and liabilities for the current and prior periods are measured at the amount expected to be recovered from or paid to the taxation authorities. The tax rates and tax laws used to compute the amount are those that are enacted or substantively enacted by the balance sheet date.

Hudbay is subject to income taxes in numerous jurisdictions. Significant judgement is required in determining the worldwide provision for income taxes due to the complexity of legislation. There are many transactions and calculations for which the ultimate tax determination is uncertain during the ordinary course of business. The Company recognizes liabilities for anticipated tax issues based on estimates of whether additional taxes will be due. Where the final tax outcome of these matters is different from the amounts that were initially recorded, such differences will affect the income tax and deferred tax provisions in the period in which such determination is made.

Additionally, future changes in tax laws in the jurisdictions in which Hudbay operates could limit the ability of the Company to obtain tax deductions in future periods.

Deferred Tax

Deferred tax is recognized using the balance sheet method in respect of temporary differences at the balance sheet date between the tax basis of assets and liabilities, and their carrying amounts for financial reporting purposes.

Deferred income tax liabilities are recognized for all taxable temporary differences, except:

-where the deferred income tax liability arises from the initial recognition of goodwill, or the initial recognition of an asset or liability in a transaction that is not a business combination and, at the time of the transaction, affects neither the accounting profit nor taxable profit or loss; and

26

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

-in respect of taxable temporary differences associated with investments in subsidiaries, associates and interests in joint ventures, where the timing of the reversal of the temporary differences can be controlled and it is probable that the temporary differences will not reverse in the foreseeable future.

Deferred income tax assets are recognized for all deductible temporary differences, carry-forward of unused tax assets and unused tax losses, to the extent that it is probable that taxable profit will be available against which the deductible temporary differences, and the carry-forward of unused tax assets and unused tax losses can be utilized, except:

-where the deferred income tax asset relating to the deductible temporary difference arises from the initial recognition of an asset or liability in a transaction that is not a business combination and, at the time of the transaction, affects neither the accounting profit nor taxable profit or loss; and

-in respect of deductible temporary differences associated with investments in subsidiaries, associates and interests in joint ventures, deferred tax assets are recognized only to the extent that it is probable that the temporary differences will reverse in the foreseeable future and taxable profit will be available against which the temporary differences can be utilized.

To the extent that it is probable that taxable profit will be available to offset the deductible temporary differences, Hudbay recognizes the deferred tax asset regarding the temporary difference on decommissioning, restoration and similar liabilities and recognizes the corresponding deferred tax liability regarding the temporary difference on the related assets.

The carrying amount of deferred income tax assets is reviewed at each balance sheet date and reduced to the extent that it is no longer probable that sufficient taxable profit will be available to allow all or part of the deferred income tax asset to be utilized. Unrecognized deferred income tax assets are reassessed at each balance sheet date and are recognized to the extent that it has become probable that future taxable profit will be available to allow the deferred tax asset to be recovered. 

Judgement is required in determining whether deferred tax assets are recognized on the consolidated balance sheets. Deferred tax assets, including those arising from unutilized tax losses, require management to assess the likelihood of taxable profit in future periods in order to utilize recognized deferred tax assets. Estimates of future taxable income are based on forecast cash flows from operations and the application of existing tax laws in each jurisdiction. To the extent that future cash flows and taxable income differ significantly from estimates, the ability to realize the net deferred tax assets recorded at the balance sheet date could be affected.

Deferred tax is measured on an undiscounted basis at the tax rates that are expected to apply in the periods in which the asset is realized or the liability is settled, based on tax rates and tax laws enacted or substantively enacted at the balance sheet date.

Deferred income tax assets and deferred income tax liabilities are offset if a legally enforceable right exists to offset current tax assets against current tax liabilities and the deferred income taxes relate to the same taxable entity and the same taxation authority.

Current and deferred taxes relating to items recognized outside profit or loss (whether in other comprehensive income or directly in equity) are recognized outside profit or loss and not in the consolidated income statements. Mining taxes and royalties are treated and disclosed as current and deferred taxes if they have the characteristics of an income tax.

27

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

(p) Share capital and reserves:

Transaction costs

Transaction costs directly attributable to equity transactions are recognized as a deduction from equity.

Other capital reserve

The other capital reserve is used for equity-settled share-based compensation and includes amounts for stocks options granted and not exercised.

Foreign currency translation reserve

The foreign currency translation reserve is used to record exchange differences arising from the translation of the financial statements of foreign operations. Exchange differences arising from the translation of the financial statements of foreign operations form part of the net investment in the foreign operation. Translation gains and losses remain in the reserve until disposal of all or a portion of the foreign operation.

(q) Share-based compensation:

Hudbay offers a Deferred Share Unit ("DSU") plan for non-employee members of the Board of Directors, a Restricted Share Unit ("RSU") plan for employees, a Performance Share Unit ("PSU") plan for employees and a stock option plan for employees. These plans are included in provisions on the consolidated balance sheets and further described in note 24. Changes in the fair value of the liabilities are recorded in the consolidated income statements.

Cash-settled transactions, consisting of DSUs, RSUs and PSUs, are initially measured at fair value and recognized as an obligation at the grant date. The liabilities are remeasured to fair value at each reporting date up to and including the settlement date, with changes in fair value recognized in the consolidated income statements. Hudbay values the liabilities based on the change in the Company's share price. Additional DSUs, RSUs and PSUs are credited to reflect dividends paid on Hudbay common shares over the vesting period. The current portion of the liability reflects those grants that have vested or that are expected to vest within twelve months.

DSUs vest on the grant date and are redeemable when a participant is no longer a member of the Board of Directors. Issue and redemption prices of DSUs are based on the average closing price of the Company's common shares for the five trading days prior to issuance or redemption.

RSUs and PSUs are issued under Hudbay's Long Term Equity Plan ("LTEP Plan") and vest on or before December 31st of the third calendar year after the year in which the services corresponding to such share unit award were performed. RSUs and PSUs granted under the LTEP Plan may be settled in the form of the Company's common shares or, at the option of Hudbay, the cash equivalent based on the market price of the common shares as of the vesting date. Hudbay has historically settled RSUs in cash. Except in specified circumstances, RSUs and  PSUs terminate when an employee ceases to be employed by the Company. Valuations of RSUs and PSUs reflect estimated forfeitures.

Equity-settled transactions with employees relate to stock options and are measured by reference to the fair value at the earlier of the grant date and the date that the employee unconditionally became entitled to the award. Fair value is determined using a Black-Scholes option pricing model, which relies on estimates of the future risk-free interest rate, future dividend payments, future share price volatility and the expected average life of the options. Hudbay believes this model adequately captures the substantive features of the option awards and is appropriate to calculate their fair values. The fair value determined at the grant date is recognized over the vesting period in accordance with vesting terms and conditions, with a corresponding increase to other capital reserves. The amount recognized as an expense is adjusted to reflect the number of awards for which the related service and non-market vesting conditions are expected to be met.

28

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

(r) Earnings per share:

The Company presents basic and diluted earnings (loss) per share ("EPS") data for its common shares. Basic EPS is calculated by dividing the profit or loss attributable to common shareholders of the Company by the weighted average number of common shares outstanding during the period. Diluted EPS is determined by adjusting the profit or loss attributable to common shareholders and the weighted average number of common shares outstanding for the effects of all dilutive potential common shares, which previously consisted of stock options granted to employees and warrants.

When calculating earnings per share for periods where the Company has a loss, Hudbay's calculation of diluted earnings per share excludes any incremental shares from the assumed conversion of stock options as they would be anti-dilutive.

(s) Leases:

Leases, under which substantially all the risks and rewards incidental to ownership of the leased item are transferred to Hudbay, are capitalized as assets at the inception of the lease at the lower of fair value or the present value of the minimum lease payments. Lease payments are apportioned between finance charges and the reduction of the liability so as to achieve a constant periodic rate of interest on the remaining balance of the liability. Finance charges are reflected in the consolidated income statements as finance costs.

Non-ROU lease payments are recognized as an expense in the consolidated income statements on a straight-line basis over the lease term.

(t) Segment reporting:

An operating segment is a component of the Company that engages in business activities from which it may earn revenue and incur expenses and for which discrete financial information is available. Hudbay's chief executive officer regularly reviews the operating results of each operating segment to make decisions about resources to be allocated to the segment and assess its performance. In determining operating segments, Hudbay considers location and decision-making authorities. Refer to note 31.

(u) Statement of cash flows:

Hudbay presents interest paid and dividends paid as financing activities, except if the interest is related to capitalized borrowing costs, and interest received is presented as an investing activity in the consolidated statement of cash flow. Hudbay presents the consolidated statement of cash flows using the indirect method.

29

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

4.New standards

New standards and interpretations adopted

(a) Amendment to IFRS 3 - Business Combinations

The amendment to IFRS 3 clarifies the definition of a business and includes an optional concentration test to determine whether an acquired set of activities and assets is a business. This amendment is in effect January 1, 2020 and will be applied prospectively to future acquisition transactions.

New standards and interpretations not yet adopted

(b) Amendment to IAS 16 - Property, Plant and Equipment

The amendments to IAS 16 prohibit deducting from the cost of property, plant and equipment the proceeds from selling items produced while bringing the assets to the location and condition necessary for them to be capable of operating in the manner intended by management. Instead, a company will recognize such sales proceeds and related cost in profit or loss. This amendment is in effect January 1, 2022 with early adoption permitted.

Hudbay intends to early adopt this amendment as of January 1, 2021 with retrospective application only to items of property, plant and equipment that were brought to the location and condition necessary for them to be capable of operating in the manner intended by management on or after January 1, 2020. The Company expects that the adoption of this amendment will impact the 2021 consolidated financial statements as it expects certain development projects to achieve commercial production in 2021, however, no restatement of prior periods is expected.

(c) Interest Rate Benchmark Reform - Phase II - Amendments to IFRS 9, IAS 39, IFRS 7, IFRS 4 and IFRS 6

These amendments require companies to determine if there is a significant change in the basis of determining  contractual cash flows as a result of interest rate benchmark reform / IBOR reform. A company will be required to determine if the replacement of an existing interest rate benchmark with an alternative rate benchmark results in contractual cash flows that are significantly different for financial instruments, lease payments, insurance contracts and/or items that use hedge accounting. If IBOR reform result in a transition on an economically equivalent basis with no value transfer having occurred, the changes to the standard allow the contractual cash flow changes to be applied prospectively, similar to a change in a market rate. These amendments are in effect for periods beginning on or after January 1, 2021 with earlier application being permitted and with retrospective application required. An entity is not required to restate prior periods.

Hudbay does not believe the impact of these amendments will result in material changes to the consolidated financial statements.

30

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

5.Acquisition of remaining interest in the Rosemont project

In March 2019, the Company entered into an agreement with United Copper & Moly LLC ("UCM") to purchase    UCM's remaining 7.95% interest in the Rosemont project, and to terminate all of UCM's remaining earn-in and off-take rights. The acquisition was completed on April 25, 2019.

Upfront cash consideration of $45,000 was paid on April 25, 2019, and the Company also committed to pay three annual installments of $10,000 per year, commencing July 1, 2022.

To facilitate an orderly acquisition of UCM's interest in Rosemont, Hudbay, immediately prior to closing the acquisition, agreed to release UCM from repayment obligations under an intercompany Rosemont project loan in exchange for an increase in equity interest in Rosemont.  As a result, the loan receivable balance of $25,978 was written off. The Company recognized the loss on the loan receivable in the income statement (refer to note 6d). In addition, in order to recognize previously unfunded contributions to the Rosemont Project due from UCM, Hudbay recognized an increase to other capital reserves, a component of shareholder's equity.

The acquisition provides Hudbay with 100% ownership of Rosemont, allowing greater strategic flexibility with respect to capital structure and project financing alternatives. In exchange for acquiring the percentage ownership not already owned by Hudbay, the Company paid:

Cash	$	45,000
Present value of future cash installments		23,557
Total consideration	$	68,557

As part of the increase in ownership of the Rosemont Project, Hudbay acquired and assumed the following assets and liabilities, which represented the fair value of the assets and liabilities not already owned by Hudbay at the time of transaction:

Current assets	$	343
Non-current assets		68,904
Liabilities		(690	)
Net assets acquired	$	68,557

31

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

6.Revenue and expenses

(a)Revenue

Hudbay's revenue by significant product types:

		Year ended December 31,
		2020			2019
Copper	$	563,910		$	786,332
Zinc		264,106			284,897
Gold		180,949			120,366
Silver		25,986			29,315
Molybdenum		25,627			31,270
Other		5,619			4,760
		1,066,197			1,256,940
Non-cash streaming arrangement items 1
Amortization of deferred revenue - gold		27,854			32,028
Amortization of deferred revenue - silver		39,409			60,370
Amortization of deferred revenue - variable consideration adjustments - prior periods		6,668			(16,295	)
		73,931			76,103
Pricing and volume adjustments 2		9,178			(12,123	)
		1,149,306			1,320,920
Treatment and refining charges		(56,888	)		(83,481	)
	$	1,092,418		$	1,237,439
1 See note 18.
2 Pricing and volume adjustments represent mark-to-market adjustments on initial estimate of provisionally priced sales, realized and unrealized changes to fair value for non-hedge derivative contracts and adjustments to originally invoiced weights and assays.

32

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

Consideration from the Company's stream agreements is considered variable (note 18). Gold and silver stream revenue can be subject to cumulative adjustments when the amount of precious metals to be delivered under the contract changes. As a result of changes in the Company's mineral reserve and resource estimate in the first quarter of 2020 and amendments made to the 777 mine plan in the third quarter of 2020, the amortization rate by which deferred revenue is drawn down into income was adjusted and, as required, a current period catch up adjustment is made for all prior year stream revenues since the stream agreement inception date. This variable consideration adjustment for the year ended December 31, 2020 resulted in increased revenue of $6,668. The variable consideration adjustment for the year ended December 31, 2019 resulted in a reversal of revenue of $16,295.

(b)Depreciation and amortization

Depreciation of property, plant and equipment and amortization of intangible assets are reflected in the  consolidated income statements as follows:

		Year ended December 31,
		2020		2019
Cost of sales	$	361,827	$	344,555
Selling and administrative expenses		1,776		2,079
	$	363,603	$	346,634

(c)Share-based compensation expenses

Share-based compensation expenses are reflected in the consolidated income statements as follows:

		Cash-settled								Total share-based compensation expense
		RSUs		DSUs		PSUs		Stock options
Year ended December 31, 2020
Cost of sales	$	1,400	$	-	$	-	$	-	$	1,400
Selling and administrative		4,872		5,149		1,987		1,122		13,130
Other expenses		478		-		-		-		478
	$	6,750	$	5,149	$	1,987	$	1,122	$	15,008
Year ended December 31, 2019
Cost of sales	$	400	$	-	$	-	$	-	$	400
Selling and administrative		928		1,157		-		-		2,085
Other expenses		229		-		-		-		229
	$	1,557	$	1,157	$	-	$	-	$	2,714

During the twelve months ended December 31, 2020, the Company granted 1,581,385 stock options (twelve months ended December 31, 2019 - nil). For further details on stock options, see note 24b.

33

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

(d)Other expenses

		Year ended December 31,
		2020		2019
Regional costs	$	3,602	$	3,780
Loss on disposal of property, plant and equipment		5,088		4,807
Closure cost adjustment - non-producing properties		2,721		2,289
Allocation of community costs		2,880		2,216
Write down of UCM receivable		-		25,978
Pampacancha delivery obligation		-		7,499
Other		3,292		4,547
	$	17,583	$	51,116

During the first quarter of 2019, Hudbay recognized an obligation to deliver additional precious metal credits to Wheaton Precious Metals ("Wheaton") as a result of Hudbay's expectation that mining at the Pampacancha deposit would not begin until after January 1, 2020. The obligation was paid in four quarterly installments, with all payments having been made in 2020.

(e)Impairment

During 2019, Hudbay recorded impairment losses of $322,249 for non-current assets relating to the Arizona cash generating units ("CGU").

		Arizona
Pre-tax impairment to:
Property, plant & equipment	$	322,249
Tax impact - (recovery)		(80,143	)
After-tax impairment charge	$	242,106

On July 31, 2019, the U.S. District Court of the District of Arizona ("Court") issued a ruling in the lawsuits challenging the U.S. Forest Service's issuance of the Final Record of Decision ("FROD") for the Rosemont project in Arizona. The Court ruled to vacate and remand the FROD thereby delaying the expected start of construction of Rosemont. Hudbay and the U.S. federal government have appealed the Court's decision to the U.S. Ninth Circuit Court of Appeals. However, the Court's ruling and the subsequent impact to the Company's market capitalization gave rise to an indicator of impairment. Following an impairment test conducted as of September 30, 2019, it was determined that the recoverable amount of the Arizona CGU was lower than its carrying value, causing Hudbay to recognize an impairment loss related to these assets.

34

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

(f)Employee benefits expense

This table presents employee benefit expense recognized in Hudbay's consolidated income statements, including amounts transferred from inventory upon sale of goods:

		Year ended December 31,
		2020		2019
Current employee benefits	$	179,486	$	171,173
Share-based compensation (notes 6c, 19, 24)
Equity settled stock options		1,122		-
Cash-settled restricted share units		6,750		1,557
Cash-settled deferred share units		5,149		1,157
Cash-settled performance share units		1,987		-
Employee share purchase plan		1,783		1,645
Post-employee pension benefits
Defined benefit plans		11,671		10,643
Defined contribution plans		1,774		1,635
Other post-retirement employee benefits		9,305		8,457
Termination benefits		582		628
	$	219,609	$	196,895

Manitoba has a profit sharing plan required by the collective bargaining agreement whereby 10% of Manitoba's after tax profit (excluding provisions or recoveries for deferred income tax and deferred mining tax) for any given fiscal year will be distributed to all eligible employees in the Flin Flon/Snow Lake operations, with the exception of executive officers and key management personnel.

Peru has a profit sharing plan required by Peruvian law whereby 8% of Peru's taxable income will be distributed to all employees within Peru's operations.

The Company has an employee share purchase plan for executives and other eligible employees where participants may contribute between 1% and 10% of their pre-tax base salary to acquire Hudbay shares. The Company makes a matching contribution of 75% of the participant's contribution.

See note 20 for a description of Hudbay's pension plans and note 21 for Hudbay's other employee benefit plans.

35

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

(g)Net finance expenses

		Year ended December 31,
		2020			2019
Net interest expense on long-term debt
Interest expense on long-term debt	$	82,712		$	78,265
Interest capitalized		-			(9,890	)
		82,712			68,375
Accretion on streaming arrangements (note 18)
Current year additions		60,362			63,725
Variable consideration adjustments - prior periods		(3,692	)		6,047
		56,670			69,772
Change in fair value of financial assets and liabilities at fair value through profit or loss
Embedded derivatives		(45,387	)		3,708
Gold prepayment liability		20,141			-
Investments		(4,124	)		4,539
		(29,370	)		8,247
Other net finance costs
Net foreign exchange (gains) losses		(1,644	)		1,388
Accretion on community agreements measured at amortized cost		3,641			1,222
Unwinding of discounts on provisions		3,543			4,392
Withholding taxes		8,267			8,100
Premium paid on redemption of notes (note 17)		7,252			-
Write-down of unamortized transaction costs (note 17)		3,817			-
Other finance expense		8,826			11,027
Interest income		(1,812	)		(8,527	)
		31,890			17,602
Net finance expense	$	141,902		$	163,996

Until October 1, 2019, interest expense related to certain long-term debt had been capitalized to the Rosemont project. Following the Court ruling to vacate and remand the U.S. Forest Service's issuance of the Final Record of Decision for the Rosemont project during the third quarter of 2019, Hudbay ceased capitalization effective October 1, 2019. The capitalization of this interest expense will resume upon the reinstatement of permits and will continue from that point until commercial production is reached.

Other finance expense relates primarily to fees on Hudbay's revolving credit facilities and leases.

36

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

7.Cash

Cash balances represent deposits with a maturity date of less than 3 months.

8.Trade and other receivables

		Dec. 31, 2020		Dec. 31, 2019
Current
Trade receivables	$	107,787	$	87,332
Statutory receivables		28,445		16,543
Other receivables		4,967		2,119
		141,199		105,994
Non-current
Taxes receivable		16,941		17,669
Other receivables		1,627		1,595
		18,568		19,264
	$	159,767	$	125,258

9.Inventories

		Dec. 31, 2020		Dec. 31, 2019
Current
Stockpile	$	13,906	$	10,396
Work in progress		6,364		14,420
Finished goods		72,923		62,230
Materials and supplies		49,912		51,774
		143,105		138,820
Non-current
Stockpile		16,704		14,626
Materials and supplies		5,302		4,829
		22,006		19,455
	$	165,111	$	158,275

The cost of inventories recognized as an expense, including depreciation, and included in cost of sales amounted to $921,895 for the year ended December 31, 2020 (year ended December 31, 2019 -  $978,810).

During the year ended December 31, 2020, Hudbay recognized a net expense of $32 in cost of sales related to adjustments of the carrying value of inventories to net realizable value (year ended December 31, 2019 - $504). Adjustments to the carrying value of inventories to net realizable value were related to changes in commodity prices.

37

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

10.Other financial assets

		Dec. 31, 2020		Dec. 31, 2019
Current
Derivative assets	$	2,736	$	1,712
Restricted cash		337		337
		3,073		2,049
Non-current
Investments at fair value through profit or loss		15,669		11,287
	$	18,742	$	13,336

Investments at fair value through profit or loss consist of securities in Canadian metals and mining companies, all of which are publicly traded. The change in investments at fair value through profit or loss is mostly attributed to fluctuations in market price and foreign exchange impact.

11.Intangibles and other assets

Intangibles and other assets of $21,173 includes $15,764 of other assets (December 31, 2019 - $5,384) and $5,409 of intangibles (December 31, 2019 - $5,027).

Other assets represent the carrying value of certain future community costs. The liability remaining for these agreements is recorded in other financial liabilities at amortized cost (note 15)). Amortization of the carrying amount is recorded in the consolidated income statements within other expenses (note 6d) or exploration expense, depending on the nature of the agreement. The increase in other assets during the year ended December 31, 2020 primarily relates to amendments to the original agreements with communities for the Constancia operation which allow Hudbay to extract minerals over the useful life of the Constancia operation.

Intangibles mainly represent computer software costs.

		Dec. 31, 2020		Dec. 31, 2019
Cost
Balance, beginning of year	$	21,538	$	18,557
Additions		1,466		2,325
Disposals		-		(96	)
Effects of movement in exchange rates		346		752
Balance, end of year		23,350		21,538
Accumulated amortization
Balance, beginning of year		16,511		14,395
Additions		1,138		1,606
Disposals		-		(96	)
Effects of movement in exchange rates		292		606
Balance, end of year		17,941		16,511
Intangibles, net book value	$	5,409	$	5,027

38

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

12.Property, plant and equipment

Dec. 31, 2020		Exploration and evaluation assets		Capital works in progress			Mining properties			Plant and equipment			Plant and equipment- ROU assets			Total
Balance, Jan. 1, 2020	$	69,903	$	733,874		$	2,146,583		$	2,653,752		$	201,972		$	5,806,084
Additions		809		256,251			311			28,523			17,759			303,653
Capitalized stripping and development		-		-			83,137			-			-			83,137
Decommissioning and restoration		-		263			6,849			39,680			-			46,792
Interest capitalized		-		-			-			-			-			-
Transfers and other movements		8,040		(36,668	)		(41,256	)		70,777			(893	)		-
Disposals		-		-			-			(19,681	)		(5,884	)		(25,565	)
Effects of movements in exchange rates		307		3,442			21,837			20,668			1,349			47,603
Balance, Dec. 31, 2020		79,059		957,162			2,217,461			2,793,719			214,303			6,261,704
Accumulated depreciation
Balance, Jan. 1, 2020		-		-			963,530			1,069,687			110,308			2,143,525
Depreciation for the year		-		-			146,113			200,632			23,351			370,096
Disposals		-		-			-			(14,038	)		(2,475	)		(16,513	)
Effects of movement in exchange rates		-		-			16,631			15,300			1,010			32,941
Balance, Dec. 31, 2020		-		-			1,126,274			1,271,581			132,194			2,530,049
Net book value	$	79,059	$	957,162		$	1,091,187		$	1,522,138		$	82,109		$	3,731,655

39

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

Dec. 31, 2019		Exploration and evaluation assets		Capital works in progress			Mining properties			Plant and equipment			Plant and equipment- ROU assets1			Total
Balance, January 1, 2019	$	52,206	$	873,781		$	1,998,439		$	2,473,176		$	180,151		$	5,577,753
Additions		17,016		109,372			-			33,309			22,158			181,855
Acquisitions (note 5)		-		91,332			3,157			-			373			94,862
Capitalized stripping and development		-		-			103,108			-			-			103,108
Decommissioning and restoration		-		41			3,314			86,053			-			89,408
Interest capitalized		-		9,890			-			-			-			9,890
Transfers and other movements		-		(30,000	)		642			30,406			(1,048	)		-
Impairments (note 6e)		-		(322,249	)		-			-			-			(322,249	)
Disposals		-		(2,029	)		-			(10,747	)		(1,533	)		(14,309	)
Effects of movements in exchange rates		681		1,528			41,080			38,452			1,793			83,534
Other		-		2,208			(3,157	)		3,103			78			2,232
Balance, Dec. 31, 2019		69,903		733,874			2,146,583			2,653,752			201,972			5,806,084
Accumulated depreciation
Balance, January 1, 2019		-		-			780,754			872,330			89,877			1,742,961
Depreciation for the year		-		-			154,970			179,062			19,850			353,882
Disposals		-		-			-			(6,675	)		-			(6,675	)
Effects of movement in exchange rates		-		-			27,806			24,970			581			53,357
Balance, Dec. 31, 2019		-		-			963,530			1,069,687			110,308			2,143,525
Net book value	$	69,903	$	733,874		$	1,183,053		$	1,584,065		$	91,664		$	3,662,559

At December 31, 2019 capital works in progress decreased compared to January 1, 2019 as a result of the impairment charge of $322,249 (pre-tax) related to the Arizona CGU (see note 6e), partially offset by fixed asset additions.

Management determined that an increase in the market capitalization deficiency was related to a Court issued ruling in the lawsuits challenging the U.S. Forest Service's issuance of the FROD for the Rosemont project in Arizona, which was an indication that Rosemont's carrying value might not be recoverable. As a result, the Company conducted an impairment test of the Arizona CGU.

For the impairment test completed at September 30, 2019, Fair Value Less Cost of Disposal, ("FVLCD") was used to determine the recoverable amount since it is higher than value in use. FVLCD was calculated using discounted after-tax cash flows based on cash flow projections and assumptions in Hudbay's most current life of mine ("LOM") plans. The fair value measurement in its entirety is categorized as Level 3 based on the degree to which fair value inputs are observable and have a significant effect on the recorded fair value.

LOM plans are based on optimized mine and processing plans and the assessment of capital expenditure requirements of a mine site. LOM plans incorporate management's best estimates of key assumptions which are discount rates, future commodity prices, production based on current estimates of recoverable reserves, future operating and capital costs, value of mineral resources not included in the LOM plan, beginning date of project cash flows incorporating permit related project delays and future foreign exchange rates.

40

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

The discount rate was based on the CGU's weighted average cost of capital, of which the two main components are the cost of equity and the after-tax cost of debt. Cost of equity was calculated based on the capital asset pricing model, incorporating the risk-free rate of return based on the US Government's marketable bond yields as at the valuation date, the Company's beta coefficient adjustment to the market equity risk premium based on the volatility of the Company's return in relation to that of a comparable market portfolio, plus a country risk premium, size premium and company-specific risk factor. Cost of debt was determined by applying an appropriate market indication of the Company's borrowing capabilities and the corporate income tax rate applicable to the Arizona CGU. As at September 30, 2019, a real discount rate of 9.50% for the Arizona CGU was used to calculate the estimated after-tax discounted future net cash flows, commensurate with its individual estimated level of risk.

Commodity prices used in the impairment assessment were determined by reference to external market participant sources. The key commodity price for this assessment is the price of copper. Where applicable to each of Hudbay's CGUs, the cash flow calculations were based on estimates of future production levels applying forecasts for metal prices, which included forecasts for long-term prices. As at September 30, 2019, for the Arizona CGU, the cash flow calculations utilized a long-term copper price of $3.10/lb, molybdenum long-term prices of $11.00/lb and capital, operating and reclamation costs based on the most current LOM plans.

Expected future cash flows used to determine the FVLCD used in the impairment testing are inherently uncertain and could materially change over time. Should management's estimate of the future not reflect actual events, impairments may be identified. This may have a material effect on the Company's consolidated financial statements. Although it is reasonably possible for a change in key assumptions to occur, the possible effects of a change in any single assumption may not fairly reflect the impact on a CGU's fair value as the assumptions are inextricably linked. For example, a decrease in the assumed price of long-term copper could result in amendments to the mine plans which would partially offset the effect of lower prices. It is difficult to determine how all of these factors would interrelate; however, in deriving a recoverable amount, management believes all of these factors need to be considered.

As at September 30, 2019, the carrying value of the Arizona CGU exceeded the estimated recoverable amount of $615,368 by $242,106 (after-tax), leading to the impairment charge recorded (note 6e).

At December 31, 2020, the Company assessed whether there were impairment or impairment reversal indicators associated the general business environment and known changes to business planning and determined there were none (note 6e).

41

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

13.Trade and other payables

		Dec. 31, 2020		Dec. 31, 2019
Trade payables	$	104,598	$	68,742
Accruals and payables		72,698		80,375
Accrued interest		30,766		34,603
Exploration and evaluation payables		1,351		884
Statutory payables		23,734		7,800
	$	233,147	$	192,404

Accruals and payables include operational and capital costs and employee benefit amounts owing.

14.Other liabilities

		Dec. 31, 2020		Dec. 31, 2019
Current
Provisions (note 19)	$	33,675	$	33,575
Pension liability (note 20)		13,552		12,015
Other employee benefits (note 21)		3,154		2,806
Unearned revenue		1,590		1,015
	$	51,971	$	49,411

15.Other financial liabilities

		Dec. 31, 2020		Dec. 31, 2019
Current
Derivative liabilities	$	15,312	$	10,295
Embedded derivatives (note 27d)		-		9,074
Other financial liabilities at amortized cost		9,401		8,707
		24,713		28,076
Non-current
Deferred Rosemont acquisition consideration		25,961		24,491
Gold prepayment liability		137,031		-
Other financial liabilities at amortized cost		31,386		15,293
		194,378		39,784
	$	219,091	$	67,860

The derivative liabilities include derivative and hedging transactions. Derivative liabilities are carried at their fair value with changes in fair value recorded to the consolidated income statements. The fair value adjustments for hedging type derivatives are recorded in revenue. Fair value adjustments for embedded derivatives are recorded within net finance expense.

42

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

On May 7, 2020, the Company entered into an agreement and received $115,005 in exchange for the delivery of 79,954 gold ounces starting January 2022 and ending in December 2023, which were valued at gold forward curve prices averaging $1,682 per ounce at the time of the transaction. The agreement has been assessed as a financial liability that has been designated as fair value through profit or loss within change in fair value of financial instruments, with a component of the fair value related to the fluctuation in the Company's own credit risk being recorded to other comprehensive income. The fair value adjustment recorded in profit or loss and other comprehensive income for the year ended December 31, 2020 totaled loss of $22,026.

Other financial liabilities at amortized cost relate to agreements with communities near the Constancia operation which allow Hudbay to extract minerals over the useful life of the Constancia operation, carry out exploration and evaluation activities in the area and provide Hudbay with community support to operate in the region. The changes in other financial liabilities at amortized cost during the year ended December 31, 2020 primarily relates to changes in estimated community payments arising from the execution of the Pampacancha surface rights agreement and individual land user agreements with certain community members, partially offset by disbursements.

The following table summarizes changes in other financial liabilities at amortized cost:

Balance, January 1, 2019	$	21,361
Net additions		7,369
Disbursements		(6,351	)
Accretion		1,222
Effects of changes in foreign exchange		399
Balance, December 31, 2019	$	24,000
Net additions		116,233
Disbursements		(98,375	)
Accretion		3,641
Effects of changes in foreign exchange		(4,712	)
Balance, December 31, 2020	$	40,787

43

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

16.Lease Liability

Balance, January 1, 2019	$	89,215
Additional capitalized leases (note 12)		22,158
Lease payments		(32,952	)
Accretion and other movements		3,526
Balance, December 31, 2019	$	81,947
Additional capitalized leases (note 12)		17,759
Lease payments		(35,980	)
Accretion and other movements		(212	)
Balance, December 31, 2020	$	63,514

		Dec. 31, 2020		Dec. 31, 2019
Current	$	33,473	$	32,781
Non-current		30,041		49,166
	$	63,514	$	81,947

Hudbay has entered into leases for its Peru, Manitoba and Arizona business units which expire between 2020 and 2043. The interest rates on leases which were capitalized have interest rates between 1.95% to 5.44%, per annum. The range of interest rates utilized for discounting varies depending mostly on the Hudbay entity acting as lessee and duration of the lease. For certain leases, Hudbay has the option to purchase the equipment and vehicles leased at the end of the terms of the leases. Hudbay's obligations under these leases are secured by the lessor's title to the leased assets. The present value of applicable lease payments has been recognized as a ROU asset, which was included as a non-cash addition to property, plant and equipment, and a corresponding amount as a lease liability.

There are no restrictions placed on Hudbay by entering into these leases.

The following outlines expenses recognized within the Company's consolidated income statements for the periods ended December 31, 2020 and December 31, 2019, relating to leases for which a recognition exemption was applied.

		Year ended December 31,
		2020		2019
Short-term leases	$	40,253	$	45,745
Low value leases		353		92
Variable leases		57,389		56,152
Total	$	97,995	$	101,989

Payments made for short term, low value and variable leases would mostly be captured as expenses in the  consolidated income statements, however, certain amounts may be capitalized to PP&E for the Arizona business unit during its development phase and certain amounts may be reported in inventories given the timing of sales. Variable consideration leases include equipment used for heavy civil works at Constancia.

44

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

17.Long-term debt

Long-term debt is comprised of the following:

		Dec. 31, 2020			Dec. 31, 2019
Senior unsecured notes (a)	$	1,139,695		$	991,558
Less: Unamortized transaction costs - revolving credit facilities (b)		(4,020	)		(6,303	)
	$	1,135,675		$	985,255

(a)Senior unsecured notes

Balance, January 1, 2019	$	989,306
Change in fair value of embedded derivative (prepayment option)		1,079
Accretion of transaction costs and premiums		1,173
Balance, December 31, 2019	$	991,558
Addition to Principal, net of $8,176 transaction costs		591,824
Principal repayments		(400,000	)
Change in fair value of embedded derivative (prepayment option)		(47,169	)
Write-down of unamortized transaction costs		2,315
Accretion of transaction costs and premiums		1,167
Balance, December 31, 2020	$	1,139,695

On September 23, 2020, Hudbay completed an offering of $600,000 aggregate principal amount of 6.125% senior unsecured notes due April 2029 (the "2029 Notes").

Hudbay used the proceeds of the offering to satisfy and discharge all of its obligations with respect to its then outstanding $400,000 aggregate principal amount of 7.25% senior unsecured notes due 2023 (the "2023 Notes").

The unamortized transaction costs of $2,315 were expensed upon extinguishment of the 2023 Notes. The early redemption of these notes resulted in a charge of $7,252, which was recorded on the consolidated income statement (note 6g).

As at December 31, 2020, $1,200,000 aggregate principal amount of senior notes were outstanding in two series: (i) a series of 7.625% senior notes due 2025 in an aggregate principal amount of $600,000 and (ii) a series of 6.125% senior notes due 2029 in an aggregate principal amount of $600,000.

The senior notes are guaranteed on a senior unsecured basis by substantially all of the Company's subsidiaries, other than HudBay (BVI) Inc. and certain excluded subsidiaries, which include the Company's subsidiaries that own an interest in the Rosemont project and any newly formed or acquired subsidiaries that primarily hold or may develop non-producing mineral assets that are in the pre-construction phase of development. Hudbay's revolving credit facilities are secured against substantially all of the Company's assets, other than those associated with the Arizona business unit.

45

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

(b)Unamortized transaction costs - revolving credit facilities

Balance, January 1, 2019	$	8,276
Accretion of transaction costs		(2,342	)
Transaction costs		369
Balance, December 31, 2019	$	6,303
Accretion of transaction costs		(3,062	)
Write-down of unamortized transaction costs		(1,502	)
Transaction costs		2,281
Balance, December 31, 2020 1	$	4,020
1 Balance, representing deferred transaction costs, is in an asset position.

On August 31, 2020, Hudbay completed a restructuring of its two senior secured credit facilities. The total available credit has been reduced from $550,000 to $400,000 and various financial covenants have been amended.

The unamortized transaction costs of $1,502 were expensed upon restructuring of the credit facilities.

As at December 31, 2020, the Peru business unit had $24,796 in letters of credit issued under the Peru revolving credit facility to support its reclamation obligations and the Manitoba business unit had $90,295 in letters of credit issued under the Canada revolving credit facility to support its reclamation and pension obligations. As at December 31, 2020, there were no cash advances under the credit facilities.

Surety bonds

The Arizona business unit had $8,591 in surety bonds and the Peru business unit had $20,000 in surety bonds, issued to support future reclamation and closure obligations. No cash collateral is required to be posted under these surety bonds.

Other letters of credit

The Peru business unit had $45,000 in letters of credit issued with various Peruvian financial institutions. No cash collateral is required to be posted under these letters of credit.

46

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

18.Deferred revenue

On August 8, 2012 and November 4, 2013, Hudbay entered into precious metals stream transactions with Wheaton whereby Hudbay has received aggregate deposit payments of $455,100 against delivery of (i) 100% of payable gold and silver from the 777 mine until the end of 2016, and delivery of 50% of payable gold and 100% of payable silver for the remainder of the 777 mine life; and aggregate deposit payments of $429,900 against the delivery of (ii) 100% of payable silver and 50% of payable gold from the Constancia mine.

In addition to the aggregate deposit payments of $885,000, as gold and silver is delivered under the stream agreements, Hudbay receives cash payments equal to the lesser of (i) the market price and (ii) $400 per ounce (for gold) and $5.90 per ounce (for silver), subject to 1% annual escalation after three years, from the inception of the agreement.

Hudbay recorded the deposits received as deferred revenue and recognizes amounts in revenue as gold and silver are delivered under the stream agreements. Hudbay determines the amortization of deferred revenue to the consolidated income statements on a per unit basis using the estimated total number of gold and silver ounces expected to be delivered under the stream agreements over the life of the 777 and Constancia life-of-mine plans. During the third quarter of 2020, Hudbay revised its estimate of remaining mineralization for the 777 deposit and as such adjusted the drawdown rates for the remainder of the year. For the year ended December 31, 2020  the drawdown rates for the 777 stream agreement for gold and silver were $1,173 and $22.43 per ounce, respectively (year ended December 31, 2019 - $1,177 and $22.51 per ounce, respectively). For the year ended December 31, 2020 the drawdown rates for the Constancia stream agreement for gold and silver were $976 and $21.52 per ounce, respectively (year ended December 31, 2019 - $948 and $21.77 per ounce, respectively). Hudbay estimates the current portion of deferred revenue based on deliveries anticipated over the next twelve months.

Hudbay has determined that precious metals stream contracts are subject to variable consideration and contain a significant financing component. As such, the Company recognizes a financing charge at each reporting period and will gross up the deferred revenue balance to recognize the significant financing element that is part of these contracts. Hudbay's streaming arrangements are secured against the mining properties and other business unit assets associated with the applicable stream.

Hudbay expects that the remaining performance obligations for the 777 and Constancia streams will be settled by the expiry of their respective stream agreements, which is no earlier than 2052.

As part of the streaming agreement for the 777 mine, Hudbay must repay, with precious metals credits, the legal deposit provided by August 1, 2052, the expiry date of the agreement. If the legal deposit is not fully repaid with precious metals credits from 777 production by the expiry date, a cash payment for the remaining amount will be due at the expiry date of the agreement. Given the mineral reserve and resources of the 777 mine and the current mine plan, there is a possibility that an amount of the legal deposit may not be repaid by means of 777 mine's precious metals credits over its expected remaining mine life. As at December 31, 2020, this prepayment amount does not meet the definition of a financial liability. Hudbay incorporates the possibility of repayment as part of its assessment of variable consideration in recognizing the amount of deferred revenue to recognize in income.

47

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

The following table summarizes changes in deferred revenue:

Balance, January 1, 2019	$	566,078
Amortization of deferred revenue
Liability drawdown		(92,398	)
Variable consideration adjustments - prior periods		16,295
Accretion on streaming arrangements
Current year additions		63,725
Variable consideration adjustments - prior periods		6,047
Effects of changes in foreign exchange		4,009
Balance, December 31, 2019	$	563,756
Amortization of deferred revenue
Liability drawdown		(67,263	)
Variable consideration adjustments - prior periods		(6,668	)
Accretion on streaming arrangements (note 6g)
Current year additions		60,362
Variable consideration adjustments - prior periods		(3,692	)
Effects of changes in foreign exchange		189
Balance, December 31, 2020	$	546,684

Consideration from the Company's stream agreement is considered variable. Gold and silver stream revenue can be subject to cumulative adjustments when the number of ounces to be delivered under the contract changes. As a result of changes in the Company's mineral reserve and resource estimate in the first quarter of 2020 and amendments made to the 777 mine plan in the third quarter of 2020, the amortization rate by which deferred revenue is drawn down into income was adjusted and, as required, a current period catch up adjustment is made for all prior period stream revenues since the stream agreement inception date. This variable consideration adjustment resulted in an increase in revenue of $6,668 and reversal of finance expense of $3,692 for the year ended December 31, 2020 (December 31, 2019 - revenue reversal of $16,295 and additional finance expense $6,047).

During the year ended December 31, 2020, the Company recognized an adjustment to gold and silver revenue and finance costs due to a net increase in the Company's mineral reserve and resources estimates coupled with a change to the 777 mine plan. During the year ended December 31, 2019 the Company recognized an adjustment to gold and silver revenue and finance costs.

Deferred revenue is reflected in the consolidated balance sheets as follows:

		Dec. 31, 2020		Dec. 31, 2019
Current	$	102,782	$	86,933
Non-current		443,902		476,823
	$	546,684	$	563,756

48

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

19.Provisions

		Decommis- sioning, restoration and similar liabilities			Deferred share units (note 24a)			Restricted share units1 (note 24a)			Performan- ce share units (note 24a)		Other			Total
Balance, January 1, 2020	$	302,116		$	3,876		$	5,477		$	-	$	2,956		$	314,425
Net additional provisions made		5,868			1,628			3,642			1,257		15			12,410
Amounts used		(18,737	)		(497	)		(2,646	)		-		(1,824	)		(23,704	)
Unwinding of discount (note 6g)		3,543			-			-			-		-			3,543
Effect of change in discount rate		43,180			-			-			-		-			43,180
Effect of foreign exchange		7,162			191			116			43		(3	)		7,509
Effect of change in share price		-			3,521			3,860			730		-			8,111
Balance, December 31, 2020	$	343,132		$	8,719		$	10,449		$	2,030	$	1,144		$	365,474

¹ Certain amounts relating to the Arizona segment are capitalized.

Provisions are reflected in the consolidated balance sheets as follows:

December 31, 2020		Decommis-sioning, restoration and similar liabilities		Deferred share units (note 24a)		Restricted share units1 (note 24a)		Performance share units (note 24a)		Other		Total
Current (note 14)	$	20,308	$	8,719	$	4,648	$	-	$	-	$	33,675
Non-current		322,824		-		5,801		2,030		1,144		331,799
	$	343,132	$	8,719	$	10,449	$	2,030	$	1,144	$	365,474

		Decommis-sioning, restoration and similar liabilities			Deferred share units (note 24a)			Restricted share units1 (note 24a)			Performance share units (note 24a)		Other			Total
Balance, January 1, 2019	$	202,024		$	4,288		$	12,201		$	-	$	411		$	218,924
Net additional provisions made		68,881			1,479			2,885			-		2,882			76,127
Amounts used		(4,136	)		(1,668	)		(9,380	)		-		(341	)		(15,525	)
Unwinding of discount (note 6g)		4,392			-			-			-		-			4,392
Effect of change in discount rate		23,635			-			-			-		-			23,635
Effect of foreign exchange		7,320			99			225			-		4			7,648
Effect of change in share price		-			(322	)		(454	)		-		-			(776	)
Balance, December 31, 2019	$	302,116		$	3,876		$	5,477		$	-	$	2,956		$	314,425

¹ Certain amounts relating to the Arizona segment are capitalized.

49

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

December 31, 2019		Decommis- sioning, restoration and similar liabilities		Deferred share units (note 24a)		Restricted share units1 (note 24a)		Performan- ce share units (note 24a)		Other		Total
Current (note 14)	$	23,621	$	3,876	$	4,468	$	-	$	1,610	$	33,575
Non-current		278,495		-		1,009		-		1,346		280,850
	$	302,116	$	3,876	$	5,477	$	-	$	2,956	$	314,425

Decommissioning, restoration and similar liabilities are remeasured at each reporting date to reflect changes in discount rates, which can significantly affect the liabilities.

Decommissioning, restoration and similar liabilities

Hudbay's decommissioning, restoration and similar liabilities relate to the rehabilitation and closure of currently operating mines and metallurgical plants, development-phase properties and closed properties. The amount of the provision has been recorded based on estimates and assumptions that management believes are reasonable; however, actual decommissioning and restoration costs may differ from expectations.

During the year ended December 31, 2020, additional provisions were recognized mostly as a result of lower discount rates and increased cost in Peru and Manitoba as well as additional disturbance in Peru.

During 2019, additional provisions were recognized as a result of higher estimates for closure activities of tailings facilities at the Manitoba operations to ensure compliance with higher industry-wide standards for tailings management safety and, to a lesser extent, increased mine activity footprints and the resulting higher disturbance at the Constancia operation.

Hudbay's decommissioning and restoration liabilities relate mainly to its Manitoba operations. Management anticipates that the assets in Flin Flon will be placed on care and maintenance once mining activities are completed at 777 mine in order to maintain optionality for restart should a new mine be found in the Flin Flon area. The majority of closure activities will occur once all mining activities in Manitoba are completed. These provisions also reflect estimated post-closure cash flows that extend to the year 2100 for ongoing monitoring and water treatment requirements. Management anticipates most decommissioning and restoration activities for the Constancia operation will occur from 2035 to 2070, which include ongoing monitoring and water treatment requirements. 

These estimates have been discounted to their present value at rates ranging from 0.12% to 1.65% per annum (2019 - 1.59% to 2.39%), using pre-tax risk-free interest rates that reflect the estimated maturity of each specific liability.

50

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

20.Pension obligations

Hudbay maintains non-contributory and contributory defined benefit pension plans for certain of its employees.

The Company uses a December 31 measurement date for all of its plans. For Hudbay's significant plans, the most recent actuarial valuations filed for funding purposes were performed during 2020 using data as at December 31, 2019. For these plans, the next actuarial valuation required for funding purposes will be performed during 2021 using data as of December 31, 2020.

Movements in the present value of the defined benefit obligation in the current and previous years were as follows:

		Year ended
		Dec. 31, 2020			Dec. 31, 2019
Opening defined benefit obligation:	$	243,733		$	211,512
Current service costs		11,044			9,880
Interest cost		6,569			7,156
Benefits paid from plan		(35,384	)		(16,745	)
Benefits paid from employer		(1,317	)		(934	)
Participant contributions		48			64
Effects of movements in exchange rates		2,780			11,660
Remeasurement actuarial (gains)/losses:
Arising from changes in demographic assumptions		(1,461	)		-
Arising from changes in financial assumptions		16,967			29,609
Arising from experience adjustments		(2,625	)		(2,258	)
Settlement payments from plan assets		-			(6,307	)
Loss on settlement		-			96
Closing defined benefit obligation	$	240,354		$	243,733

The defined benefit obligation closing balance, by member group, is as follows:

		Dec. 31, 2020		Dec. 31, 2019
Active members	$	211,861	$	231,959
Deferred members		2,198		1,555
Retired members		26,295		10,219
Closing defined benefit obligation	$	240,354	$	243,733

51

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

Movements in the fair value of the pension plan assets in the current and previous years were as follows:

		Year ended
		Dec. 31, 2020			Dec. 31, 2019
Opening fair value of plan assets:	$	202,119		$	175,795
Interest income		5,695			6,170
Remeasurement adjustment:
Return on plan assets (excluding amounts included in net interest expense)		15,377			21,460
Contributions from the employer		12,987			11,952
Employer direct benefit payments		1,317			934
Contributions from plan participants		48			64
Benefit payment from employer		(1,317	)		(934	)
Administrative expenses paid from plan assets		(77	)		(82	)
Benefits paid		(35,384	)		(16,745	)
Settlement payments from plan assets		-			(6,307	)
Effects of changes in foreign exchange rates		2,721			9,812
Closing fair value of plan assets	$	203,486		$	202,119

The amount included in the consolidated balance sheets arising from the entity's obligation in respect of its defined benefit plans is as follows:

		Dec. 31, 2020			Dec. 31, 2019
Present value of funded defined benefit obligation	$	220,210		$	224,364
Fair value of plan assets		(203,486	)		(202,119	)
Present value of unfunded defined benefit obligation		20,144			19,369
Net liability arising from defined benefit obligation	$	36,868		$	41,614

Reflected in the consolidated balance sheets as follows:

		Dec. 31, 2020		Dec. 31, 2019
Pension obligation - current (note 14)	$	13,552	$	12,015
Pension obligation - non-current		23,316		29,599
Total pension obligation	$	36,868	$	41,614

52

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

Pension expense is as follows:

		Dec. 31, 2020		Dec. 31, 2019
Service costs:
Current service cost	$	11,044	$	9,880
Loss on settlement		-		96
Total service cost		11,044		9,976
Net interest expense		874		986
Administration cost		77		82
Defined benefit pension expense	$	11,995	$	11,044
Defined contribution pension expense	$	1,791	$	1,639

Remeasurement on the net defined benefit liability:

		Dec. 31, 2020			Dec. 31, 2019
Return on plan assets (excluding amounts included in net interest expense)	$	(15,377	)	$	(21,460	)
Actuarial gains arising from changes in demographic assumptions		(1,461	)		-
Actuarial losses arising from changes in financial assumptions		16,967			29,609
Actuarial gains arising from experience adjustments		(2,625	)		(2,258	)
Defined benefit (gain)/loss related to remeasurement	$	(2,496	)	$	5,891
Total pension cost	$	11,290		$	18,574

Pension amounts recognized include those directly related to production of inventory; such amounts are recognized initially as costs of inventory and are expensed in the consolidated income statements within cost of sales upon sale of the inventory.

The current service cost, the interest cost and administration cost for the year are included in the employee benefits expense. The remeasurement of the net defined benefit liability is included in OCI.

53

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

The defined benefit pension plans typically expose Hudbay to actuarial risks such as: investment risk, interest rate risk, longevity risk and salary risk.

Investment risk	The present value of the liabilities for the defined benefit plans is calculated using a discount rate determined by reference to high quality corporate bond yields; if the return on plan assets is below this rate, it will create a plan deficit. Hudbay's primary quantitative investment objectives are maximization of the long term real rate of return, subject to an acceptable degree of investment risk and preservation of principal. Risk tolerance is established through consideration of several factors including past performance, current market condition and the funded status of the plan.
Interest risk	A decrease in the bond interest rate will increase the pension plan liabilities; however, this will be partially offset by an increase in the return on the plan's debt investments.
Longevity risk	The present value of the defined benefit plans liabilities is calculated by reference to the best estimate of the mortality of plan participants both during and after their employment. An increase in the life expectancy of the plan participants will increase the pension plans liabilities.
Salary risk	The present value of the defined benefit plans liabilities for some of the pension plans is calculated by reference to the future salaries of plan participants. As such, an increase in the salary of the plan participants will increase the plans' liabilities.

The principal assumptions used for the purposes of the actuarial valuations were as follows:

	2020		2019
Defined benefit cost:
Discount rate - benefit obligations	3.08	%	3.73	%
Discount rate - service cost	3.10	%	3.75	%
Expected rate of salary increase1	2.75	%	2.75	%
Average longevity at retirement age for current pensioners (years)2 :
Males	21.2		21.1
Females	23.9		23.9
Defined benefit obligation:
Discount rate	2.54	%	3.08	%
Expected rate of salary increase1	2.75	%	2.75	%
Average longevity at retirement age for current pensioners (years)2 :
Males	20.3		21.2
Females	23.7		23.9
Average longevity at retirement age for current employees (future pensioners) (years)2 :
Males	22.2		23.0
Females	25.4		25.6
1 Plus merit and promotional scale based on member's age
2 CPM2014 Priv with CPM-B projection scale.

54

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

Hudbay reviews the assumptions used to measure pension costs (including the discount rate) on an annual basis. Economic and market conditions at the measurement date affect these assumptions from year to year. In determining the discount rate, Hudbay considers the duration of the pension plan liabilities.

Significant actuarial assumptions for the determination of the defined benefit obligation are discount rate, expected salary increase and mortality. The sensitivity analysis below has been determined based on reasonably possible changes of the respective assumptions occurring at the end of the reporting periods, while holding other assumptions constant:

-If the discount rate is 50 basis points higher (lower), the defined benefit obligation would decrease by $22,846 (increase by $26,250).

-If the expected salary growth increases (decreases) by 1%, the defined benefit obligation would increase by $3,526 (decrease $3,158).

-If the life expectancy increases (decreases) by one year for both men and women, the defined benefit obligation would increase by $2,978 (decrease by $3,039).

The sensitivity analysis presented above may not be representative of the actual change in the defined benefit obligation as it is unlikely that the change in assumptions would occur in isolation of one another as some of the assumptions may be correlated.

Furthermore, in presenting the above sensitivity analysis, the present value of the defined benefit obligation has been calculated using the projected unit credit method at the end of the reporting period, which is the same as that applied in calculating the defined benefit obligation liability recognized in the consolidated balance sheets.

The Company's main pension plans are registered federally with the Office of the Superintendent of Financial Institution and with the Canada Revenue Agency. The registered pension plans are governed in accordance with the Pension Benefits Standards Act and the Income Tax Act. The sponsor contributes the amount needed to maintain adequate funding as dictated by the prevailing regulations.

Expected employer contribution to the pension plans for the fiscal year ending December 31, 2021 is $12,437.

The average duration of the pension obligation at December 31, 2020 is 21.2 years (2019 - 19.3 years). This number can be broken down as follows:

-Active members: 22.3 years (2019: 19.7 years)

-Deferred members: 21.9 years (2019: 22.0 years)

-Retired members: 12.0 years (2019: 10.5 years)

Asset-Liability-Matching studies are performed periodically to analyze the investment policies in terms of risk and-return profiles.

The actual return on plan assets in 2020 was 10.8% (2019: 15.1%).

The pension plans do not invest directly in either securities or property/real estate of the Company.

With the exception of fixed income investments and certain equity instruments, the plan assets are actively managed by investment managers, with the goal of attaining returns that potentially outperform passively managed investments. Within appropriate limits, the actual composition of the invested funds may vary from the prescribed investment mix.

55

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

The following is a summary of the fair value classification levels for investment:

December 31, 2020		Level 1		Level 2		Level 3		Total
Investments:
Money market instruments	$	4,766	$	-	$	-	$	4,766
Pooled equity funds		68,926		-		-		68,926
Pooled fixed income funds		-		98,922		-		98,922
Alternative investment funds		-		30,323		-		30,323
Balanced funds		-		549		-		549
	$	73,692	$	129,794	$	-	$	203,486

December 31, 2019		Level 1		Level 2		Level 3		Total
Investments:
Money market instruments	$	1,588	$	-	$	-	$	1,588
Pooled equity funds		76,680		-		-		76,680
Pooled fixed income funds		-		103,646		-		103,646
Alternative investment funds		-		19,438		-		19,438
Balanced funds		-		767		-		767
	$	78,268	$	123,851	$	-	$	202,119

56

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

21.Other employee benefits

Hudbay sponsors both other long-term employee benefit plans and non-pension post-employment benefits plans and uses a December 31 measurement date. These obligations relate mainly to commitments for post-retirement health benefits. Information about Hudbay's post-employment and other long-term employee benefits is as follows:

Movements in the present value of the defined benefit obligation in the current and previous years were:

		Year ended
		Dec. 31, 2020			Dec. 31, 2019
Opening defined benefit obligation	$	116,696		$	93,528
Current service cost1		4,140			3,060
Past service cost		-			-
Interest cost		3,478			3,600
Effects of movements in exchange rates		2,423			4,864
Remeasurement actuarial (gains)/losses:
Arising from changes in demographic assumptions		(4,460	)		-
Arising from changes in financial assumptions		10,043			14,094
Arising from experience adjustments		(489	)		87
Benefits paid		(2,215	)		(2,537	)
Closing defined benefit obligation	$	129,616		$	116,696

¹ Includes remeasurement of other long term employee benefits

The defined benefit obligation closing balance, by group member, is as follows:

		Dec. 31, 2020		Dec. 31, 2019
Active members	$	68,983	$	60,801
Inactive members		60,633		55,895
Closing defined benefit obligation	$	129,616	$	116,696

Movements in the fair value of defined benefit amounts in the current and previous years were as follows:

		Dec. 31, 2020			Dec. 31, 2019
Employer contributions	$	2,215		$	2,537
Benefits paid		(2,215	)		(2,537	)
Closing fair value of assets	$	-		$	-

The non-pension employee benefit plan obligations are unfunded.

57

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

Reconciliation of assets and liabilities recognized in the consolidated balance sheets:

		Dec. 31, 2020		Dec. 31, 2019
Unfunded benefit obligation	$	129,616	$	116,696
Vacation accrual and other - non-current		3,046		2,888
Net liability	$	132,662	$	119,584

Reflected in the consolidated balance sheets as follows:

		Dec. 31, 2020		Dec. 31, 2019
Other employee benefits liability - current (note 14)	$	3,154	$	2,806
Other employee benefits liability - non-current		129,508		116,778
Net liability	$	132,662	$	119,584

Other employee future benefit expense includes the following:

		Dec. 31, 2020		Dec. 31, 2019
Current service cost 1	$	4,140	$	3,060
Net interest cost		3,478		3,600
Components recognized in consolidated income statements	$	7,618	$	6,660
1 Includes remeasurement of other long term employee benefit

		Dec. 31, 2020			Dec. 31, 2019
Remeasurement on the net defined benefit liability:
Actuarial gains arising from changes in demographic assumptions	$	(4,460	)	$	-
Actuarial losses arising from changes in financial assumptions		10,043			14,094
Actuarial (gains)/losses arising from changes experience adjustments		(489	)		87
Components recognized in statements of comprehensive income	$	5,094		$	14,181
Total other employee future benefit cost	$	12,712		$	20,841

Other employee benefit amounts recognized include those directly related to production of inventory; such

amounts are recognized initially as costs of inventory and are expensed in the consolidated income

statements within cost of sales upon sale of the inventory.

58

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

	Dec. 31, 2020		Dec. 31, 2019
Defined benefit cost:
Discount rate	3.17	%	3.88	%
Initial weighted average health care trend rate	5.68	%	5.74	%
Ultimate weighted average health care trend rate	4.00	%	4.00	%
Average longevity at retirement age for current pensioners (years)1 :
Males	21.2		21.1
Females	23.9		23.9

	Dec. 31, 2020		Dec. 31, 2019
Defined benefit obligation:
Discount rate	2.76	%	3.17	%
Initial weighted average health care trend rate	5.66	%	5.68	%
Ultimate weighted average health care trend rate	4.00	%	4.00	%
Average longevity at retirement age for current pensioners (years)1 :
Males	20.3		21.2
Females	23.7		23.9
Average longevity at retirement age for current employees (future pensioners) (years)1 :
Males	22.2		23.1
Females	25.4		25.6

¹ CPM2014 Priv with CPM-B projection scale

Hudbay reviews the assumptions used to measure other employee benefit costs (including the discount rate) on an annual basis.

The other employee benefit costs typically expose Hudbay to actuarial risks such as: interest rate risk, health care cost inflation risk and longevity risk.

Interest risk	A decrease in the bond interest rate will increase the plan liabilities.
Health care cost inflation risk	The majority of the plan's benefit obligations are linked to health care cost inflation and higher inflation will lead to higher liabilities.
Longevity risk	The majority of the plans' benefit liability is calculated by reference to the best estimate of the mortality of plan participants both during and after their employment. An increase in the life expectancy of the plan participants will increase the plans liabilities. This is particularly significant for benefits subject to health care cost inflation where increases in inflation result in higher sensitivity to changes in life expectancy.

59

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

The sensitivity analyses below have been determined based on reasonably possible changes of the respective assumptions occurring at the end of the reporting period, while holding other assumptions constant:

-If the discount rate is 50 basis points higher (lower), the defined benefit obligation would decrease by $11,585 (increase by $13,392).

-If the health care cost assumption increases (decreases) by 1%, the defined benefit obligation would increase by $27,392 (decrease by $21,023).

-If the life expectancy increases (decreases) by one year for both men and women, the defined benefit obligations would increase by $5,553 (decrease by $5,645).

The average duration of the non-pension post-employment obligation at December 31, 2020 is 19.4 years (2019: 19.6 years).

This number can be broken down as follows:

-Active members: 24.6 years (2019: 24.9 years)

-Inactive members: 13.6 years (2019: 13.9 years)

22.Income and mining taxes

(a)Tax recoveries:

The tax expense (recoveries) is applicable as follows:

		Year ended December 31,
		2020			2019
Current:
Income taxes	$	4,458		$	24,919
Mining taxes		4,671			4,720
Adjustments in respect of prior years		(398	)		6,273
		8,731			35,912
Deferred:
Income tax recoveries - origination, revaluation and/or reversal of temporary differences		(39,411	)		(133,468	)
Mining tax recoveries - origination, revaluation and/or reversal of temporary difference		(3,331	)		(12,214	)
Adjustments in respect of prior years		(494	)		817
		(43,236	)		(144,865	)
	$	(34,505	)	$	(108,953	)

Adjustments in respect of prior years refers to amounts changing due to the filing of tax returns and assessments from government authorities.

60

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

(b)Deferred tax assets and liabilities as represented on the consolidated balance sheets:

		Dec. 31, 2020			Dec. 31, 2019
Deferred income tax asset	$	94,070		$	69,950
Deferred mining tax asset		7,829			5,096
		101,899			75,046
Deferred income tax liability		(220,568	)		(233,218	)
Deferred mining tax liability		(8,865	)		(9,710	)
		(229,433	)		(242,928	)
Net deferred tax liability balance, end of year	$	(127,534	)	$	(167,882	)

(c)Changes in deferred tax assets and liabilities:

		Year ended Dec. 31, 2020			Year ended Dec. 31, 2019
Net deferred tax liability balance, beginning of year	$	(167,882	)	$	(308,577	)
Deferred tax recovery		43,236			144,865
OCI transactions		(759	)		1,878
Foreign currency translation on the deferred tax liability		(2,129	)		(6,048	)
Net deferred tax liability balance, end of year	$	(127,534	)	$	(167,882	)

61

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

(d) Reconciliation to statutory tax rate:

As a result of its mining operations, the Company is subject to both income and mining taxes. Generally, most expenditures incurred are deductible in computing income tax, whereas mining tax legislation, although based on a measure of profitability from carrying on mining operations, is more restrictive in respect of the deductions permitted in computing income subject to mining tax. These restrictions include costs unrelated to mining operations as well as deductions for financing expenses, such as interest and royalties. In addition, income unrelated to carrying on mining operations is not subject to mining tax.

A reconciliation between tax expense and the product of accounting profit multiplied by the Company's statutory income tax rate for the years ended December 31, 2020 and 2019 is as follows:

		Year ended December 31,
		2020			2019
Statutory tax rate		26.3	%		27.0	%
Tax recovery at statutory rate	$	(47,047	)	$	(122,246	)
Effect of:
Deductions related to mining taxes		(1,369	)		(1,493	)
Adjusted income taxes		(48,416	)		(123,739	)
Mining tax expense (recovery)		1,291			(6,674	)
		(47,125	)		(130,413	)
Permanent differences related to:
Capital items		(160	)		3,270
Other income tax permanent differences		(1,165	)		1,747
Impact of remeasurement on decommissioning liability		7,094			(12,018	)
Temporary income tax differences not recognized		(1,827	)		(351	)
Other temporary income tax differences not recognized		2,927			2,323
Non-deductible impairment on UCM receivable		-			7,041
Withholding tax on dividends		-			6,826
Impact related to differences in tax rates in foreign operations		5,534			20,338
Impact of changes to statutory tax rates		2,412			(259	)
Foreign exchange on non-monetary items		(3,628	)		(6,633	)
Impact related to tax assessments and tax return amendments		1,433			(824	)
Tax recovery	$	(34,505	)	$	(108,953	)

A decrease in the statutory tax rate in 2020 mainly reflects a reduction in the Canadian statutory tax rate which is the result of the changes to the relevant provincial allocation factors based on income earned and expenses incurred in different Canadian jurisdictions.

62

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

(e) Income tax effect of temporary differences - recognized:

The tax effects of temporary differences that give rise to significant portions of the deferred tax assets and deferred tax liabilities at December 31, 2020 and 2019 are as follows:

		Balance sheet						Income Statement
		Dec. 31, 2020			Dec. 31, 2019			Dec. 31, 2020			Dec. 31, 2019
Deferred income tax (liability) asset/expense (recovery)
Property, plant and equipment	$	(88,368	)	$	(96,841	)	$	(8,473	)	$	13,434
Pension obligation		9,467			11,332			1,294			(1,115	)
Other employee benefits		25,687			16,837			(8,850	)		(3,349	)
Decommissioning and restoration obligation		37,902			41,208			3,307			(33,391	)
Non-capital losses		110,374			90,446			(19,928	)		(17,976	)
Share issuance and debt cost		8,972			6,540			(2,768	)		4,361
Embedded derivative (prepayment option)		(13,137	)		(694	)		12,443			245
Deferred revenue		(809	)		(112	)		697			(12,839	)
Other		3,982			1,234			(4,516	)		(7,755	)
Deferred income tax asset / expense (recovery)		94,070			69,950			(26,794	)		(58,385	)
Deferred income tax liability (asset)/ (recovery) expense
Property, plant and equipment		292,858			259,145			33,713			(79,892	)
Other employee benefits		203			(80	)		(176	)		(320	)
Asset retirement obligations		(1,588	)		(833	)		(756	)		85
Non-capital losses		(78,607	)		(28,643	)		(49,965	)		(1,269	)
Other		7,702			3,629			4,073			7,302
Deferred income tax liability/ expense (recovery)		220,568			233,218			(13,111	)		(74,094	)
Deferred income tax liability/ expense (recovery)	$	(126,498	)	$	(163,268	)	$	(39,905	)	$	(132,479	)

The above reconciling items are disclosed at the tax rates that apply in the jurisdiction where they have arisen.

63

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

(f) Income tax temporary differences - not recognized:

The Company has not recognized a deferred tax asset in respect of the following deductible income tax temporary differences:

		Dec. 31, 2020		Dec. 31, 2019
Property, plant and equipment	$	46,718	$	33,269
Capital losses		166,227		159,545
Other employee benefits		51,226		68,866
Asset retirement obligations		193,898		146,679
Non-capital losses		115,902		122,979
Temporary differences not recognized	$	573,971	$	531,338

The deductible temporary differences excluding non-capital losses do not expire under current tax legislation.

The Canadian non-capital losses were incurred between 2006 and 2020 and expire between 2026 and 2040. Hudbay incurred United States net operating losses between 2004 and 2020 which have a twenty year carry forward period. Peruvian net operating losses were incurred in 2020 which have a four year carry forward period.

(g)    Mining tax effect of temporary differences:

The tax effects of temporary differences that give rise to significant portions of the deferred mining tax assets and liabilities at December 31, 2020 and 2019 are as follows:

Canada		Dec. 31, 2020			Dec. 31, 2019
Property, plant and equipment	$	7,829		$	5,095
Peru		Dec. 31, 2020			Dec. 31, 2019
Property, plant and equipment	$	(8,865	)	$	(9,710	)

For the year ended December 31, 2020, Hudbay had unrecognized deferred mining tax assets of approximately $7,544 (December 31, 2019 - $5,361).

(h)  Unrecognized taxable temporary differences associated with investments:

There are no taxable temporary differences associated with investments in subsidiaries, associates and joint ventures, for which a deferred tax liability has not been recognized.

64

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

(i)     Taxes receivable/payable:

The timing of payments results in significant variances in period-to-period comparisons of the tax receivable and tax payable balances.

(j)     Other disclosure:

The tax rules and regulations applicable to mining companies are highly complex and subject to interpretation. The Company may be subject in the future to a review of its historic income and other tax filings and, in connection with such reviews, disputes can arise with tax authorities over the interpretation or application of certain tax rules and regulations in respect of the Company's business. These reviews may alter the timing or amount of taxable income or deductions. The amount ultimately reassessed upon resolution of issues raised may differ from the amount accrued.

65

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

23.Share capital

(a)Preference shares:

Authorized: Unlimited preference shares without par value.

Issued and fully paid: Nil.

(b)Common shares:

Authorized: Unlimited common shares without par value.

Issued and fully paid:

	Year ended December 31, 2020			Year ended Dec. 31, 2019
	Common shares		Amount	Common shares		Amount
Beginning and end of year	261,272,151	$	1,777,340	261,272,151	$	1,777,340

During the year ended December 31, 2020, the Company declared two semi-annual dividends of C$0.01 per share each. The Company paid $1,804 and $1,979 in dividends on March 27, 2020 and September 25, 2020 to shareholders of record as of March 10, 2020 and September 4, 2020.

During the year ended December 31, 2019, the Company paid $1,955 and $1,972 in dividends on March 29, 2019 and September 27, 2019 to shareholders of record as of March 8, 2019 and September 6, 2019.

The Company declared a semi-annual dividend of C$0.01 per share on February 18, 2021. The dividend will be paid on March 26, 2021 to shareholders of record as of March 9, 2021 and is expected to total C$2,613.

66

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

24.Share-based compensation

(a) Cash-settled share-based compensation:

Hudbay has three cash-settled share-based compensation plans, as described below.

Deferred Share Units (DSU)

At December 31, 2020, the carrying amount and the intrinsic value of the outstanding liability related to the DSU plan was $8,719 (December 31, 2019 - $3,876) (note 19). The following table outlines information related to DSUs granted, expenses recognized and payments made during the year.

		Year ended
		Dec. 31, 2020		Dec. 31, 2019
Granted during the year:
Number of units		465,889		337,999
Weighted average price (C$/unit)	$	4.10	$	5.89
Expenses recognized during the year1 (notes 6c)	$	5,149	$	1,157
Payments made during the year (note 19)	$	497	$	1,668

¹ This expense relates to the grant of DSUs, as well as mark-to-market adjustments, and is presented within selling and administrative expenses on the consolidated income statements.

Restricted Share Units (RSU)

RSUs granted under the LTEP Plan may be settled in the form of Hudbay common shares or, at the option of the Company, the cash equivalent based on the market price of the common shares as of the vesting date. RSUs may also be granted under Hudbay's Share Unit Plan, however; the RSUs granted under the Share Unit Plan may only be settled in cash. Hudbay has historically settled all RSUs in cash. The Company has determined that the appropriate accounting treatment is to classify the RSUs as cash settled transactions.

At December 31, 2020, the carrying amount of the outstanding liability related to the RSU plan was $10,449 (December 31, 2019 - $5,477) (note 19). The following table outlines information related to RSUs granted, expenses recognized and payments made in the year.             

		Year ended
		Dec. 31, 2020			Dec. 31, 2019
Number of units, beginning of year 1		2,223,999			3,666,867
Number of units granted during the year		1,388,786			1,080,741
Credits for dividends		17,587			7,554
Number of units forfeited during the year		(44,678	)		(573,914	)
Number of units vested		(645,357	)		(1,957,249	)
Number of units, end of year 1		2,940,337			2,223,999
Weighted average price - granted (C$/unit)	$	3.98		$	8.98
Expenses recognized during the year2 (note 6c)	$	6,750		$	1,557
Payments made during the year (note 19)	$	2,646		$	9,380

¹ Includes 738,002 and 616,397 units that have vested; however, are unreleased and unpaid as of December 31, 2020 and December 31, 2019, respectively.

67

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

² This net expense reflects recognition of RSU expense over the service period, as well as mark-to-market adjustments, and is presented mainly within cost of sales and selling and administrative expenses. Certain amounts related to the Arizona segment are capitalized.

Performance Share Units (PSU)

PSUs granted under the LTEP Plan may be settled in the form of Hudbay common shares or, at the option of the Company, the cash equivalent based on the market price of the common shares as of the vesting date. Hudbay has historically settled similar share-based compensation units in cash. The Company has determined that the appropriate accounting treatment is to classify the PSUs as cash settled transactions.

At December 31, 2020, the carrying amount of the outstanding liability related to PSU plan was $2,030 (December 31, 2019 - $0) (note 19). The following table outlines information related to PSUs granted, expenses recognized and payments made in the year.             

		Year ended
		Dec. 31, 2020		Dec. 31, 2019
Number of units, beginning of year		-		-
Number of units granted during the year		1,089,569		-
Credits for dividends		6,046		-
Number of units, end of year		1,095,615		-
Weighted average price - granted (C$/unit)	$	3.97	$	-
Expenses recognized during the year (note 6c)	$	1,987	$	-
Payments made during the year (note 19)	$	-	$	-

(b) Equity-settled share-based compensation - stock options:

The Company's stock option plan was approved in June 2005 and amended in May 2008 (the "Plan"). Under the amended Plan, the Company may grant to employees, officers, directors or consultants of the Company or its affiliates options to purchase up to a maximum of 13 million common shares of Hudbay. The Company has determined that the appropriate accounting treatment is to classify the stock options as equity settled transactions.

During the year ended December 31, 2020, the Company granted 1,581,385 stock options (year ended December 31, 2019 - nil).

The following table presents the weighted average fair value assumptions used in the Black-Scholes valuation of these options:

For options granted during the year ended		Dec. 31, 2020
Weighted average share price at grant date (CAD)	$	3.77
Risk-free rate		1.14%
Expected dividend yield		0.5%
Expected stock price volatility (based on historical volatility)		57.0%
Expected life of option (months)		84
Weighted average per share fair value of stock options granted (CAD)	$	2.02

68

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

During the year ended December 31, 2020, 18,196 stock options were forfeited, which resulted in 1,563,189 options outstanding as of December 31, 2020. There are no stock options outstanding that are exercisable as at December 31, 2020.

Dec. 31, 2020
Range of exercise prices C$	Number of options outstanding	Weighted average remaining contractual life (years)	Weighted average exercise price C$		Number of options exercisable	Weighted average share price at exercise date C$
$3.76 - $3.92	1,563,189	6.16	$	3.77	-	$	-

No options were granted under the Plan during the year ended December 31, 2019.

Hudbay estimates expected life of options and expected volatility based on historical data, which may differ from actual outcomes.

	Year ended				Year ended
	Dec. 31, 2020				Dec. 31, 2019
	Number of shares subject to option			Weighted- average exercise price C$	Number of shares subject to option		Weighted average exercise price C$
Balance, beginning of year	-				-	$	-
Number of units granted during the year	1,581,385		$	3.77	-	$	-
Forfeited	(18,196	)	$	3.76	-	$	-
Balance, end of year	1,563,189		$	3.77	-	$	-

69

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

25.Earnings per share

	Year ended
	Dec. 31, 2020	Dec. 31, 2019
Basic and diluted weighted average common shares outstanding	261,272,151	261,272,151

The determination of the diluted weighted-average number of common shares excludes the impact of 1,292,840 weighted-average stock options outstanding that were anti-dilutive for the year ended December 31, 2020 (December 31, 2019 - nil).

For periods where Hudbay records a loss, Hudbay calculates diluted loss per share using the basic weighted average number of shares. If the diluted weighted average number of shares were used, the result would be a reduction in the loss, which would be anti-dilutive. For the year ended December 31, 2020 and 2019, Hudbay calculated diluted loss per share using 261,272,151 common shares.

26.Capital management

The Company's definition of capital includes total equity and long-term debt. Hudbay's long-term debt balance as at December 31, 2020 was $1,135,675 (December 31, 2019 - $985,255).

The Company's objectives when managing capital are to maintain a strong capital base in order to:

-Advance Hudbay's corporate strategies to create long-term value for its stakeholders; and,

-Sustain Hudbay's operations and growth throughout metals and materials cycles.

Hudbay monitors its capital and capital structure on an ongoing basis to ensure they are sufficient to achieve the Company's short-term and long-term strategic objectives in a capital intensive industry. Hudbay faces several risks, including volatile metals prices, access to capital, and risk of delays and cost escalation associated with major capital projects. The Company continually assesses the adequacy of its capital structure to ensure its objectives are met. Hudbay monitors its cash and cash equivalents, which were $439,135 as at December 31, 2020 (2019 - $396,146), together with availability under its committed credit facilities. Hudbay invests its cash and cash equivalents primarily in Canadian bankers' acceptances, deposits at major Canadian and Peruvian banks, or treasury bills issued by the federal or provincial governments. In addition to the requirement to maintain sufficient cash balances to fund continuing operations, Hudbay must maintain sufficient cash to fund the interest expense on the long-term debt outstanding (note 17). As part of the Company's capital management activities, Hudbay monitors interest coverage ratios and leverage ratios.

70

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

27.Financial instruments

(a)Fair value and carrying value of financial instruments:

The following presents the fair value ("FV") and carrying value ("CV") of Hudbay's financial instruments and non-financial derivatives:

		Dec. 31, 2020						Dec. 31, 2019
		FV			CV			FV			CV
Financial assets at amortized cost
Cash and cash equivalents 1	$	439,135		$	439,135		$	396,146		$	396,146
Restricted cash1		337			337			337			337
Fair value through profit or loss
Trade and other receivables 1, 2, 3		114,381			114,381			91,046			91,046
Non-hedge derivative assets 4		2,736			2,736			1,712			1,712
Investments 5		15,669			15,669			11,287			11,287
Total financial assets		572,258			572,258			500,528			500,528
Financial liabilities at amortized cost
Trade and other payables1, 2		209,413			209,413			184,604			184,604
Deferred Rosemont acquisition consideration 8		25,961			25,961			24,491			24,491
Other financial liabilities 6		41,912			40,787			21,338			24,000
Senior unsecured notes 7		1,277,124			1,139,695			1,050,126			991,558
Fair value through profit or loss
Embedded derivatives 4		-			-			9,074			9,074
Gold prepayment liability 9		137,031			137,031			-			-
Non-hedge derivative liabilities 4		15,312			15,312			10,295			10,295
Total financial liabilities		1,706,753			1,568,199			1,299,928			1,244,022
Net financial liability	$	(1,134,495	)	$	(995,941	)	$	(799,400	)	$	(743,494	)
1 Cash and cash equivalents, restricted cash, trade and other receivables and trade and other payables are recorded at carrying value, which approximates fair value due to their short-term nature and generally negligible credit losses.
2 Excludes tax and other statutory amounts.
3 Trade and other receivables contain receivables including provisionally priced receivables classified as FVLTPL and various other items at amortized cost. The fair value of provisionally priced receivables is determined using forward metals prices which is a level 2 valuation method.
4 Derivatives are carried at their fair value, which is determined based on internal valuation models that reflect observable forward market commodity prices, currency exchange rates, and discount factors based on market US dollar interest rates adjusted for credit risk.
5 All investments are carried at their fair value, which is determined using quoted market bid prices in active markets for listed shares.
6 These financial liabilities relate to agreements with communities near the Constancia project in Peru (note 15). Fair values have been determined using a discounted cash flow analysis based on expected cash flows and a credit adjusted discount rate.
7 Fair value of the senior unsecured notes (note 17) has been determined using the quoted market price at the period end. Fair value incorporates the fair value of the prepayment option embedded derivative. The carrying value of this embedded derivative is at FVTPL (2020: $49,754; 2019: $2,585) and has been determined using a binomial tree/lattice approach based on the Hull-White single factor interest rate term structure model.
8 Discounted value based on a risk adjusted discount rate.
9 The gold prepayment liability (note 15) is designated as fair value through profit or loss under the fair value option.  Gains and losses related to the Company's own credit risk have been recorded at fair value through other comprehensive income. The fair value adjustment recorded in other comprehensive income for the year  ended December  31, 2020 was a loss of $1,885.

71

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

Fair value hierarchy

The table below provides an analysis by valuation method of financial instruments that are measured at fair value subsequent to recognition. Levels 1 to 3 are defined based on the degree to which fair value inputs are observable and have a significant effect on the recorded fair value, as follows:

-Level 1: Quoted prices in active markets for identical assets or liabilities;

-Level 2: Valuation techniques use significant observable inputs, either directly or indirectly, or valuations are based on quoted prices for similar instruments; and,

-Level 3: Valuation techniques use significant inputs that are not based on observable market data.

December 31, 2020		Level 1		Level 2		Level 3		Total
Financial assets measured at fair value
Financial assets at FVTPL:
Non-hedge derivatives	$	-	$	2,736	$	-	$	2,736
Investments		15,669		-		-		15,669
	$	15,669	$	2,736	$	-	$	18,405
Financial liabilities measured at fair value
Financial liabilities at FVTPL:
Non-hedge derivatives	$	-	$	15,312	$	-	$	15,312
Gold prepayment liability1		-		137,031		-		137,031
Financial liabilities at amortized cost:
Other financial liabilities		-		-		41,912		41,912
Senior unsecured notes		1,277,124		-		-		1,277,124
	$	1,277,124	$	152,343	$	41,912	$	1,471,379
1The gold prepayment liability (note 15) is designated as fair value through profit or loss under the fair value option.  Gains and losses related to the Company's own credit risk have been recorded at fair value through other comprehensive income. The fair value adjustment recorded in other comprehensive income for the year ended December 31, 2020 was a loss of $1,885.

December 31, 2019		Level 1		Level 2		Level 3		Total
Financial assets measured at fair value
Financial assets at FVTPL:
Non-hedge derivatives	$	-	$	1,712	$	-	$	1,712
Investments		11,287		-		-		11,287
	$	11,287	$	1,712	$	-	$	12,999
Financial liabilities measured at fair value
Financial liabilities at FVTPL:
Embedded derivatives	$	-	$	9,074	$	-	$	9,074
Non-hedge derivatives		-		10,295		-		10,295
Financial liabilities at amortized cost:
Other financial liabilities		-		-		21,338		21,338
Senior unsecured notes		1,050,126		-		-		1,050,126
	$	1,050,126	$	19,369	$	21,338	$	1,090,833

72

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

The Company's policy is to recognize transfers into and transfers out of fair value hierarchy levels as of the date of the event or change in circumstances that caused the transfer. During the year ended December 31, 2020 and 2019 Hudbay did not make any such transfers.

(b)Derivatives and hedging:

Copper fixed for floating swaps

Hudbay enters into copper fixed for floating swaps in order to manage the risk associated with provisional pricing terms in copper concentrate sales agreements. As at December 31, 2020, Hudbay had 43.4 million pounds of net copper swaps outstanding at an effective average price of $3.22/lb and settling across January to April 2021. As at December 31, 2019, Hudbay had 66.1 million pounds of net copper swaps outstanding at an effective average price of $2.67/lb and settling across January to April 2020. The aggregate fair value of the transactions at December 31, 2020 was a net liability of $13,198 (December 31, 2019 - a liability position of $8,362).

Transactions involving derivatives are with large multi-national financial institutions that Hudbay believes to be credit worthy.

Non-hedge derivative zinc contracts

Hudbay enters into future dated fixed price sales contracts with zinc customers and, to ensure that the Company continues to receive a floating or unhedged realized zinc price, Hudbay enters into forward zinc purchase contracts that effectively offset the fixed price sales contracts. At December 31, 2020, Hudbay held contracts for forward zinc purchased of3.5 million pounds (December 31, 2019 - 12.7 million pounds) that related to forward customer sales of zinc. Prices range from $0.87/lb to $1.30/lb (December 31, 2019 - $1.00/lb to $1.15/lb) and settlement dates extend to December 2021. The aggregate fair value of the transactions at December 31, 2020 was an asset position of $622 (December 31, 2019 - a net liability position of $221).

(c)Provisionally priced receivables

Changes in fair value of provisionally priced receivables

Hudbay records changes in fair value of provisionally priced receivables related to provisional pricing in concentrate purchase, concentrate sale and certain other sale contracts. Under the terms of these contracts, prices are subject to final adjustment at the end of a future period after title transfers based on quoted market prices during the quotation period specified in the contract. The period between provisional pricing and final pricing is typically up to three months.

Changes in fair value of provisionally priced receivables are presented in trade and other receivables when they relate to sales contracts and in trade and other payables when they relate to purchase contracts. At each reporting date, provisionally priced metals are marked-to-market based on the forward market price for the quotation period stipulated in the contract, with changes in fair value recognized in revenue for sales contracts and in inventory or cost of sales for purchase concentrate contracts. Cash flows related to changes in fair value of provisionally priced receivables are classified in operating activities.

73

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

As at December 31, 2020 and 2019, Hudbay's net position consisted of contracts awaiting final pricing which are as indicated below:

Metal in concentrate		Sales awaiting final pricing		Average YTD price ($/unit)
	Unit	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Copper	pounds (in thousands)	47,901	72,977	3.52	2.80
Gold	oz	18,106	16,152	1,894	1,522
Silver	oz	123,380	124,371	26.35	17.86

The aggregate changes in fair value of provisionally priced receivables within the copper and zinc concentrate sales contracts at December 31, 2020, was an asset position of $21,295(December 31, 2019 - an asset position of $10,165).

(d)Embedded derivatives

Prepayment option embedded derivative

The senior unsecured notes (note 17) contain prepayment options, which represent embedded derivatives that require bifurcation from the host contract. The prepayment options are measured at fair value, with changes in the fair value being recognized as change in fair value of financial instruments (note 6g). The fair value of the embedded derivative at December 31, 2020 was an asset of $49,754 (December 31, 2019 - $2,585).

Pampacancha delivery obligation-embedded derivative

During the first quarter of 2019, Hudbay recognized an obligation to deliver additional precious metal credits to Wheaton as a result of the Pampacancha deposit not being mined until after January 1, 2020 (note 15). The fair value of the embedded derivative at December 31, 2020 was nil as all payments have been made during 2020 (December 31, 2019 - a liability of $9,074). During the year ended December 31, 2020 precious metal credits totaling $10,856 were delivered to settle this liability.

(e)Other financial liabilities

Gold prepayment liability

The gold prepayment liability (note 15) requires settlement by physical delivery of gold ounces or equivalent gold credits. The fair value of the embedded derivative at December 31, 2020 was a liability of $137,031 (December 31, 2019 - nil).

(f)Financial risk management

Hudbay's financial risk management activities are governed by Board-approved policies addressing risk identification, hedging authorization procedures and limits and reporting. The Company's policy objective, when hedging activities are undertaken, is to reduce the volatility of future profit and cash flow within the strategic and economic goals of Hudbay. From time to time, the Company employs derivative financial instruments, including forward and option contracts, to manage risk originating from exposures to commodity price risk, foreign exchange risk and interest rate risk. Significant derivative transactions are approved by the Board of Directors, and hedge accounting is applied when certain criteria have been met. Hudbay does not use derivative financial instruments for trading or speculation purposes. The following is a discussion of the Company's risk exposures.

74

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

(i) Market risk

Market risk is the risk that changes in market prices, including foreign exchange rates, commodity prices, share prices, and interest rates will cause fluctuations in the fair value or future cash flows of a financial instrument.

Foreign currency risk

Hudbay's primary exposure to foreign currency risk arises from:

-Translation of Canadian dollar denominated costs and, to a lesser extent, Peruvian soles cost into US dollars. Substantially all of the Company's revenue are denominated in US dollars, while the majority of its operating costs are denominated in either the Canadian dollar or Peruvian sol. Generally, with gross profit, appreciation of the US dollar relative to the Canadian dollar will increase Hudbay's profit.

-Translation of foreign currency denominated cash and cash equivalents, trade and other receivables, trade and other payables, as well as other financial liabilities. Appreciation of the US dollar relative to a foreign currency will decrease the net asset value of these balances once they have been translated to US dollars, resulting in foreign currency translation losses on foreign currency denominated assets and gains on foreign currency denominated liabilities.

The Manitoba segment's primary financial instrument foreign currency exposure is on US denominated cash and cash equivalents, trade and other receivables and other financial liabilities. The Peru segment's primary financial instrument foreign currency exposure is on Peruvian soles cash and cash equivalents, trade and other payables and other financial liabilities.

The Company's exposure to foreign currency risk was as follows based on notional financial instruments amounts stated in US equivalent dollars:

		Dec. 31, 2020									Dec. 31, 2019
		CAD1			USD2			PEN3			CAD1			USD2			PEN3
Cash and cash equivalent	$	7,791		$	3,895		$	4,141		$	8,394		$	21,217		$	7,617
Trade and other receivables		31			43,316			36,951			374			56,998			25,413
Other financial assets		15,669			-			-			11,287			-			-
Trade and other payables		(6,104	)		(1,419	)		(34,622	)		(5,719	)		(435	)		(22,618	)
Other financial liabilities		-			-			(40,787	)		-			-			(24,000	)
	$	17,387		$	45,792		$	(34,317	)	$	14,336		$	77,780		$	(13,588	)
1 HMI is exposed to foreign currency risk on CAD.
2 The Manitoba segment is exposed to foreign currency risk on USD.
3 The Peru segment is exposed to foreign currency risk on PEN.

The following sensitivity analysis for foreign currency risk relates solely to financial instruments and non-financial derivatives that were outstanding as at the year-end date; each sensitivity calculation assumes all other variables are held constant. This analysis is based on values as at December 31, 2020 and does not reflect the overall effect that changes in market variables would have on the Company's operating results.

75

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

December 31, 2020	Change of:	Would have changed 2020 after-tax profit by:
USD/CAD exchange rate1	+ 10%	$1.1	million
USD/CAD exchange rate1	- 10%	(1.4)	million
USD/PEN exchange rate2	+ 10%	2.0	million
USD/PEN exchange rate2	- 10%	(2.5)	million
December 31, 2019	Change of:	Would have changed 2019 after-tax profit by:
USD/CAD exchange rate1	+ 10%	$3.4	million
USD/CAD exchange rate1	- 10%	(4.1)	million
USD/PEN exchange rate2	+ 10%	0.8	million
USD/PEN exchange rate2	- 10%	(1.0)	million
1 Effect on profit due to foreign currency remeasurements of balances denominated in a currency different from a Hudbay subsidiary's functional currency.
2 Effect on profit due to foreign currency remeasurement of balances denominated in Peruvian Sol.

Commodity price risk

Hudbay is exposed to market risk from prices for the commodities the Company produces and sells, such as copper, zinc, gold and silver. From time to time, Hudbay maintains price protection programs and conducts commodity price risk management through the use of derivative contracts. The following sensitivity analysis for commodity price risk relates solely to financial instruments and non-financial derivatives that were outstanding as at the year-end date; each sensitivity calculation assumes all other variables are held constant. This analysis is based on values as at December 31, 2020 and does not reflect the overall effect that changes in market variables would have on the Company's operating results.

December 31, 2020		Change of:		Would have changed 2020 after-tax profit by:
Copper prices ($/lb)3		+	$0.30		$	(1.4)	million
Copper prices ($/lb)3		-	$0.30		1.4		million
Zinc prices ($/lb)4		+	$0.10		0.3		million
Zinc prices ($/lb)4		-	$0.10		(0.3)		million
December 31, 2019		Change of:		Would have changed 2019 after-tax profit by:
Copper prices ($/lb)3		+	$0.30		(2.0)		million
Copper prices ($/lb)3		-	$0.30		2.0		million
Zinc prices ($/lb)4		+	$0.10		1.0		million
Zinc prices ($/lb)4		-	$0.10		(1.0)		million
	3 Effect on profit due to provisional pricing derivatives (note 27c) and copper fixed for floating swaps (note 27b).
	4 Effect on profit due to provisional pricing derivatives (note 27c) and non-hedge zinc derivatives (note 27b).

Share price risk

Hudbay is exposed to market risk from share prices of the Company's investments in listed Canadian metals and mining entities. These investments are made to foster strategic relationships, in connection with joint venture agreements and for investment purposes. Management monitors the value of these investments for the purposes of determining whether to add or reduce Hudbay's positions. The following sensitivity analysis of share price risk relates solely to financial instruments that were outstanding as at the year-end date; each sensitivity calculation assumes all other variables are held constant. This analysis is based on values as at December 31, 2020 and does not reflect the overall effect that changes in market variables would have on the Company's finance expenses.

76

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

December 31, 2020	Change of:		Would have changed 2020 after-tax profit by:
Share prices	+	25%		$	3.9	million
Share prices	-	25%		(3.9)		million
December 31, 2019	Change of:		Would have changed 2019 after-tax profit by:
Share prices	+	25%		$	2.8	million
Share prices	-	25%		(2.8)		million

Interest rate risk

Hudbay is exposed to the following interest rate risks:

-cash flow interest rate risk on its cash and cash equivalents;

-fair value interest rate risk on its embedded derivative associated with its senior notes; and,

-interest rate risk on its senior secured revolving credit facilities.

The most material of these risks is the embedded derivative associated with its senior notes. This analysis is based on values at December 31, 2020 and does not reflect the overall effect that changes in market variables would have on the Company's finance expenses.

December 31, 2020	Change of:		Would have changed 2020 after-tax profit by:
Interest rates	+	2.00%		$	(38.0)	million
Interest rates	-	2.00%		48.5		million
December 31, 2019	Change of:		Would have changed 2019 after-tax profit by:
Interest rates	+	2.00%		$	2.3	million
Interest rates	-	2.00%		(2.6)		million

(ii) Credit risk

Credit risk is the risk of financial loss to Hudbay if a customer or counterparty to a financial instrument fails to meet its obligations. The Company's maximum exposure to credit risk at the reporting date is represented by the carrying amount, net of any impairment losses recognized, of financial assets and non-financial derivative assets recorded on the consolidated balance sheets. Refer to note 27a.

A large portion of Hudbay's cash and cash equivalents are on deposits with major Schedule 1 Canadian banks. Deposits and other investments with Schedule 1 Canadian banks represented 90% of total cash and cash equivalents as at December 31, 2020 (2019 - 92%). Hudbay's investment policy requires it to comply with a list of approved investments, concentration and maturity limits, as well as credit quality. Credit concentrations in the Company's short term investments are monitored on an ongoing basis.

Transactions involving derivatives are with counterparties Hudbay believes to be creditworthy.

77

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

Management has a credit policy in place that requires the Company to obtain credit insurance from an investment grade credit insurance provider to mitigate exposure to credit risk in its receivables. At December 31, 2020, approximately 95% of Hudbay's trade receivables were insured or payable by letters of credit (2019 - 96% were insured or payable by letters of credit). Insured receivables have a credit insurance deductible of 10%. The deductible and any additional exposure to credit risk is monitored and approved on an ongoing basis.

Two customers accounted for approximately 56% of total trade receivables as at December 31, 2020 (2019 - two customers accounted for approximately 63%). Credit risk for these customers is assessed as medium to low. As at December 31, 2020, none of the Company's trade receivables were aged more than 30 days (2019 - nil).

(iii) Liquidity risk

Liquidity risk is the risk that the Company will not be able to meet its obligations associated with financial liabilities. Hudbay's objective is to maintain sufficient liquid resources to meet operational and investing requirements.

The following summarizes the contractual undiscounted cash flows of the Company's non-derivative and derivative financial liabilities, including any interest payments, by remaining contractual maturity and financial assets used to manage liquidity risk. The table includes all instruments held at the reporting date for which payments had been contractually agreed at the reporting date. The undiscounted amounts shown are gross amounts, unless the liabilities will be settled net. Amounts in foreign currency are translated at the closing rate at the reporting date. When a counterparty has a choice of when an amount is paid, the liability is allocated to the earliest possible time period.

Dec. 31, 2020		Carrying amount			Contractual cash flows			12 months or less			13 - 36 months			37 - 60 months			More than 60 months
Assets used to manage liquidity risk
Cash and cash equivalents	$	439,135		$	439,135		$	439,135			-		$	-		$	-
Restricted cash		337			337			337			-			-			-
Trade and other receivables		114,381			114,381			114,381			-			-			-
Non-hedge derivative assets		2,736			2,736			2,736			-			-			-
	$	556,589		$	556,589		$	556,589		$	-		$	-		$	-
Non-derivative financial liabilities
Trade and other payables, including embedded derivatives	$	(209,413	)	$	(209,413	)	$	(209,413	)	$	-		$	-		$	-
Other financial liabilities 1		(40,787	)		(58,837	)		(12,097	)		(9,483	)		(6,578	)		(30,679	)
Deferred Rosemont acquisition consideration		(25,961	)		(30,000	)		-			(20,000	)		(10,000	)		-
Long-term debt, including embedded derivatives		(1,139,695	)		(1,726,904	)		(87,966	)		(168,188	)		(742,125	)		(728,625	)
Gold prepayment obligation		(137,031	)		(137,031	)		-			(137,031	)		-			-
	$	(1,552,887	)	$	(2,162,185	)	$	(309,476	)	$	(334,702	)	$	(758,703	)	$	(759,304	)
Derivative financial liabilities
Non hedge derivative contracts	$	(15,312	)	$	(15,312	)	$	(15,312	)	$	-		$	-		$	-
	$	(15,312	)	$	(15,312	)	$	(15,312	)	$	-		$	-		$	-
1 Represents the Peru community agreement obligation, excluding interest.

78

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

Dec. 31, 2019		Carrying amount			Contractual cash flows			12 months or less			13 - 36 months			37 - 60 months			More than 60 months
Assets used to manage liquidity risk
Cash and cash equivalents	$	396,146		$	396,146		$	396,146		$	-		$	-		$	-
Restricted cash		337			337			337
Trade and other receivables		91,046			91,046			89,451			-			-			1,595
Non-hedge derivative assets		1,712			1,712			1,712			-			-			-
	$	489,241		$	489,241		$	487,646		$	-		$	-		$	1.595
Non-derivative financial liabilities
Trade and other payables, including embedded derivatives	$	(184,604	)	$	(184,604	)	$	(184,604	)	$	-		$	-		$	-
Other financial liabilities 1		(24,000	)		(33,723	)		(6,672	)		(4,811	)		(4,734	)		(17,506	)
Deferred Rosemont acquisition consideration		(24,491	)		(30,000	)		-			(10,000	)		(20,000	)		-
Long-term debt, including embedded derivatives		(991,558	)		(1,350,540	)		(72,165	)		(149,500	)		(1,128,875	)		-
	$	(1,224,653	)	$	(1,598,867	)	$	(263,441	)	$	(164,311	)	$	(1,153,609	)	$	(17,506	)
Derivative financial liabilities
Embedded derivative	$	(9,074	)	$	(9,074	)	$	(9,074	)	$	-		$	-		$	-
Non-hedge derivative contracts		(10,295	)		(10,295	)		(10,295	)		-			-			-
	$	(19,369	)	$	(19,369	)	$	(19,369	)	$	-		$	-		$	-
1 Represents the Peru community agreement obligation, excluding interest.

28.Commitments and contingencies

Capital commitments

(a)Non capitalized lease commitments

Hudbay has entered into various non-capitalized lease commitments for facilities and equipment. The leases expire in periods ranging from one to two years. There are no restrictions placed on the Company by entering into these leases. Future minimum lease payments under such cancellable leases recognized within results from operating activities at December 31 are:

		2020		2019
Within one year	$	58,173	$	57,860
After one year but not more than five years		2,192		26,395
More than five years		-		-
	$	60,365	$	84,255

79

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

(b) Capital Commitments

As at December 31, 2020, Hudbay had outstanding capital commitments in Canada of approximately $22,539 of which $19,014 can be terminated, approximately $39,078 in Peru, all of which can be terminated, and approximately $179,656 in Arizona, primarily related to the Rosemont project, of which approximately $89,312 can be terminated by Hudbay.

(c) Contingent liabilities

Contingent liabilities

Hudbay is involved in various claims, litigation and other matters arising in the ordinary course and conduct of business. While it is not possible to determine the ultimate outcome of such actions at this time, and inherent uncertainties exist in predicting such outcomes, it is the Company's belief that the ultimate resolution of such actions is not reasonably likely to have material adverse effect on its consolidated financial position or results of operations. The assessment of contingencies inherently involves the exercise of significant judgement and estimates of the outcome of future events. As a result of the assessment, no significant contingent liabilities have been recorded in these consolidated financial statements.

As part of the streaming agreement with Wheaton for the 777 mine, Hudbay must repay, with precious metal credits, the legal deposit provided by Wheaton by August 1, 2052, the expiry date of the arrangement. If the legal deposit is not fully repaid with precious metal credits related to 777 production by the expiry date, a cash payment for the remaining amount will be due at the expiry date of the agreement. As a result of changes in the remaining 777 mine reserves and lower precious metal prices, there is a possibility that an amount of Wheaton's legal deposit may not be repaid by means of 777 mine's production over its expected remaining mine life.

80

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

29.Related parties

(a) Group companies

The financial statements include the financial statements of the Company and the following significant subsidiaries:

				Beneficial ownership of ultimate controlling party (Hudbay Minerals Inc.)
Name	Jurisdiction	Business	Entity's Parent	2020	2019
HudBay Marketing & Sales Inc.	Canada	Marketing and sales	HMI	100%	100%
HudBay Peru Inc.	British Columbia	Holding company	HMI	100%	100%
HudBay Peru S.A.C.	Peru	Exploration/development	Peru Inc.	100%	100%
HudBay (BVI) Inc.	British Virgin Islands	Precious metals sales	Peru Inc.	100%	100%
Hudbay Arizona Inc.	British Columbia	Holding company	HMI	100%	100%
Rosemont Copper Company	Arizona	Exploration/development	HudBay Arizona (US) Holding Corporation	100%	100%

Transactions between the Company and its subsidiaries, which are related parties of the Company, have been eliminated on consolidation and are not disclosed in this note.

(b) Compensation of key management personnel

The Company's key management includes members of the Board of Directors, Hudbay's Chief Executive Officer, Hudbay's senior vice presidents and vice presidents. Total compensation to key management personnel was as follows:

		2020		2019
Short-term employee benefits1	$	7,951	$	8,319
Post-employment benefits		639		762
Long-term share-based awards		6,381		6,966
	$	14,971	$	16,047

¹ Such as salaries and social security contributions, paid annual leave and paid sick leave, profit-sharing and bonuses and nonmonetary benefits (such as medical care, housing, cars and free or subsidized goods or services) for current employees.

81

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

30.Supplementary cash flow information

(a)Change in non-cash working capital:

		Year ended December 31,
		2020			2019
Change in:
Trade and other receivables	$	(37,720	)	$	3,252
Other financial assets/liabilities		4,077			12,540
Inventories		(2,867	)		(11,759	)
Prepaid expenses		(3,722	)		(3,484	)
Trade and other payables		36,247			5,613
Provisions and other liabilities		1,602			(2,590	)
	$	(2,383	)	$	3,572

(b)Non-cash transactions:

During the year ended December 31, 2020 and 2019, Hudbay entered into the following non-cash investing and financing activities which are not reflected in the consolidated statements of cash flows:

-Remeasurement of Hudbay's decommissioning and restoration liabilities for year ended December 31, 2020 led to a net increase in related property, plant and equipment assets of $46,792 (year ended December 31, 2019 - increase of $89,408) related to lower discount rates associated with remeasurement of the liabilities.

-Property, plant and equipment included $17,759 (year ended December 31, 2019 - $22,158) of capital additions related to the recognition of ROU assets and $116,233 of capital additions related to agreements with communities (year ended December 31, 2019 - $7,369).

-In 2019, immediately prior to purchasing United Copper & Moly LLC's ("UCM") remaining interest in the Rosemont project, Hudbay agreed to release UCM from repayment obligations under a Rosemont project loan in exchange for an increase in equity in Rosemont. As a result, the loan receivable balance of $25,978 was written off. Hudbay recognized the loss on write-off of the loan receivable in the income statement (refer to note 6d). In addition, in order to recognize previously unfunded contributions to the Rosemont Project due from UCM, the Company recognized an increase to other capital reserves, a component of shareholder's equity.

82

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

31.Segmented information

Hudbay is an integrated metals producer. When making decisions on expansions, opening or closing mines, as well as day to day operations, management evaluates the profitability of the overall operation of the Company. Hudbay's main mining operations are located in Manitoba and Saskatchewan (Canada) and Cusco (Peru) and are included in the Manitoba segment and Peru segment, respectively. The Manitoba and Peru segments generate Hudbay's revenue. The Manitoba segment sells copper concentrate (containing copper, gold and silver), zinc metal and other products. The Peru segment consists of Hudbay's Constancia operation and sells copper concentrate and molybdenum concentrate. Hudbay's Arizona segment consists of the  Rosemont project located in Arizona. Corporate and other activities include the Company's exploration activities in Chile, and Nevada. The exploration entities are not individually significant, as they do not meet the minimum quantitative thresholds. Corporate activities are not considered a segment and are included as a reconciliation to total consolidated results. Accounting policies for each reported segment are the same as those of the Company. Results from operating activities represents the profit earned by each segment without allocation of corporate costs. This is the measure reported to the chief operating decision-maker, Hudbay's President and Chief Executive Officer, for the purposes of resource allocation and the assessment of segment performance. Total assets and liabilities do not reflect intercompany balances, which have been eliminated on consolidation.

Year ended December 31, 2020
		Manitoba		Peru			Arizona			Corporate and other activities			Total
Revenue from external customers	$	615,699	$	476,719		$	-		$	-		$	1,092,418
Cost of sales
Mine operating costs		391,504		300,087			-			-			691,591
Depreciation and amortization		177,552		184,275			-			-			361,827
Gross profit (loss)		46,643		(7,643	)		-			-			39,000
Selling and administrative expenses		-		-			-			41,408			41,408
Exploration and evaluation expenses		6,491		6,295			3,870			540			17,196
Other expenses		8,382		4,901			2,066			2,234			17,583
Results from operating activities	$	31,770	$	(18,839	)	$	(5,936	)	$	(44,182	)	$	(37,187	)
Net interest expense on long term debt													82,712
Accretion on streaming arrangements													56,670
Change in fair value of financial instruments													(29,370	)
Other net finance costs													31,890
Loss before tax													(179,089	)
Tax recovery													(34,505	)
Loss for the year												$	(144,584	)

83

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

Year ended December 31, 2019
		Manitoba			Peru		Arizona			Corporate and other activities			Total
Revenue from external customers	$	537,421		$	700,018	$	-		$	-		$	1,237,439
Cost of sales
Mine operating costs		385,159			356,183		-			-			741,342
Depreciation and amortization		135,429			209,126		-			-			344,555
Gross profit		16,833			134,709		-			-			151,542
Selling and administrative expenses		-			-		-			36,170			36,170
Exploration and evaluation expenses		18,476			5,804		-			6,494			30,774
Other expenses		8,201			14,022		28,149			744			51,116
Impairment loss		-			-		322,249			-			322,249
Results from operating activities	$	(9,844	)	$	114,883	$	(350,398	)	$	(43,408	)	$	(288,767	)
Net interest expense on long term debt													68,375
Accretion on streaming arrangements													69,772
Change in fair value of financial instruments													8,247
Other net finance costs													17,602
Loss before tax													(452,763	)
Tax recovery													(108,953	)
Loss for the year												$	(343,810	)

December 31, 2020
		Manitoba		Peru		Arizona		Corporate and other activities		Total
Total assets	$	801,691	$	2,535,939	$	718,982	$	610,033	$	4,666,645
Total liabilities		562,013		973,756		76,926		1,354,144		2,966,839
Property, plant and equipment1		699,884		2,290,097		709,939		31,735		3,731,655
1Included in Corporate and Other activities is $27.5 million of property, plant and equipment that is located in Nevada.

December 31, 2020
		Manitoba		Peru		Arizona		Corporate and other activities		Total
Additions to property, plant and equipment	$	159,313	$	208,805	$	18,640	$	32	$	386,790

December 31, 2019
		Manitoba		Peru		Arizona		Corporate and other activities		Total
Total assets	$	779,896	$	2,556,895	$	700,799	$	423,467	$	4,461,057
Total liabilities		556,267		926,642		78,988		1,051,037		2,612,934
Property, plant and equipment1		684,679		2,253,404		691,538		32,938		3,662,559

¹Included in Corporate and Other activities is $27.3 million of property, plant and equipment that is located in Nevada.

84

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

December 31, 2019
		Manitoba		Peru		Arizona		Corporate and other activities		Total
Additions to property, plant and equipment	$	143,418	$	101,717	$	38,923	$	905	$	284,963

Geographical Segments

The following tables represent revenue information regarding Hudbay's geographical segments for the years ended December 31, 2020 and 2019:

		2020		2019
Revenue by customer location 1
Canada	$	422,403	$	418,636
China		215,278		158,795
United States		206,906		209,382
Philippines		77,575		71,506
Peru		56,437		110,411
Switzerland		55,703		162,167
Singapore		29,314		71,506
Germany		11,725		10,731
Other		17,077		24,305
	$	1,092,418	$	1,237,439

¹ Presented based on the ultimate destination of the product if known. If the eventual destination of the product sold through traders is not known then revenue is allocated to the location of the customer's business office and not the ultimate destination of the product.

During the year ended December 31, 2020, eight customers accounted for approximately 36%, 17%, 13%, 7%, 7%, 5%, 5%, and 5% respectively, of total revenue during the year. Revenue from these customers has been presented in the Manitoba and Peru operating segments.

During the year ended December 31, 2019, six customers accounted for approximately 24%, 9%, 9%, 8%, 5% and 5%, respectively, of total revenue during the year. Revenue from these customers has been presented in the Manitoba and Peru operating segments.

85

HUDBAY MINERALS INC.
Notes to Audited Consolidated Financial Statements
(in thousands of US dollars, except where otherwise noted)
Years ended December 31, 2020 and 2019

32.Events after the reporting period

As a result of the delay in finalizing the remaining land user agreements coupled with new, heightened, domestic travel restrictions announced on January 26, 2021 by the government of Peru, Hudbay has concluded that it no longer expects to mine four million tonnes of ore from the Pampacancha deposit by June 30, 2021. If we fail to meet this milestone, we will be required to deliver an additional 8,020 ounces of gold to Wheaton in equal quarterly installments, at prevailing market prices, starting September 30, 2021.

86

EX-99.3

Management's Discussion and Analysis of

Results of Operations and Financial Condition

For the year ended

December 31, 2020

February 18, 2021

TABLE OF CONTENTS	Page
Introduction	1
Our Business	1
Strategy	2
Summary of Results	4
Key Financial Results	7
Key Production Results	8
Recent Developments	9
Constancia Operations Review	12
Manitoba Operations Review	16
Outlook	24
Financial Review	33
Liquidity and Capital Resources	44
Financial Risk Management	49
Trend Analysis and Quarterly Review	52
Non-IFRS Financial Performance Measures	55
Accounting Changes	70
Critical Accounting Judgments and Estimates	71
Disclosure Controls and Procedures and Internal Control Over Financial Reporting	72
Notes to Reader	73
Summary of Historical Results	77

INTRODUCTION

This Management's Discussion and Analysis ("MD&A") dated February 18, 2021 is intended to supplement Hudbay Minerals Inc.'s audited consolidated financial statements and related notes for the year ended December 31, 2020 (the "consolidated financial statements"). The consolidated financial statements have been prepared in accordance with International Financial Reporting Standards ("IFRS") as issued by the International Accounting Standards Board ("IASB").

References to "Hudbay", the "Company", "we", "us", "our" or similar terms refer to Hudbay Minerals Inc. and its direct and indirect subsidiaries as at December 31, 2020.

Readers should be aware that:

-This MD&A contains certain "forward-looking statements" and "forward-looking information" (collectively, "forward-looking information") that are subject to risk factors set out in a cautionary note contained in our MD&A. Please also refer to the risks discussed under the heading "Financial Risk Management" in this MD&A.

-This MD&A has been prepared in accordance with the requirements of the securities laws in effect in Canada, which may differ materially from the requirements of United States securities laws applicable to US issuers.

-We use a number of non-IFRS financial performance measures in our MD&A.

-The technical and scientific information in this MD&A has been approved by qualified persons based on a variety of assumptions and estimates.

For a discussion of each of the above matters, readers are urged to review the "Notes to Reader" discussion beginning on page 71 of this MD&A.

Additional information regarding Hudbay, including the risks related to our business and those that are reasonably likely to affect our consolidated financial statements in the future, is contained in our continuous disclosure materials, including our most recent Annual Information Form ("AIF"), consolidated financial statements and Management Information Circular available on SEDAR at www.sedar.com and on EDGAR at www.sec.gov.

All amounts are in US dollars unless otherwise noted.

OUR BUSINESS

We are a diversified mining company primarily producing copper concentrate (containing copper, gold, and silver) and zinc metal. Directly and through our subsidiaries, we own three polymetallic mines, four ore concentrators and a zinc production facility in northern Manitoba and Saskatchewan (Canada) and Cusco (Peru), and copper projects in Arizona and Nevada (United States). Our growth strategy is focused on the exploration, development, operation and optimization of properties we already control, as well as other mineral assets we may acquire that fit our strategic criteria. Our vision is to be a responsible, top-tier operator of long-life, low-cost mines in the Americas. We are governed by the Canada Business Corporations Act and our shares are listed under the symbol "HBM" on the Toronto Stock Exchange, New York Stock Exchange and Bolsa de Valores de Lima.

1

STRATEGY

Our mission is to create sustainable value through acquisition, development and operation of high quality, long life deposits with exploration potential in jurisdictions that support responsible mining, and to see the regions and communities in which we operate benefit from our presence.

We believe that the greatest opportunities for shareholder value creation in the mining industry are in the discovery and successful development of new mineral deposits, and through highly efficient low-cost operations to profitably extract ore from those deposits. We also believe that our successful development, ramp-up and operation of the Constancia open-pit mine in Peru, along with our long history of underground mining and full life-cycle experience in northern Manitoba provide us with a competitive advantage in these respects relative to other mining companies of similar scale.

Over the past decade, we have built a world-class asset base by employing a consistent long-term growth strategy. We intend to sustainably grow Hudbay through exploration and development of our robust project pipeline, as well as through the acquisition of other properties that fit our stringent strategic criteria. Furthermore, we continuously work to generate strong free cash flow and optimize the value of our producing asset portfolio through exploration, brownfield expansion projects, and efficient and safe operations.

To ensure that any capital allocation or acquisition we undertake creates sustainable value for stakeholders, we have established a number of criteria for evaluating mineral property opportunities. These include the following:

-Geography: Potential acquisitions should be located in jurisdictions that support responsible mining activity and have acceptable levels of political and social risk. Given our current scale and geographic footprint, our current geographic focus is on select investment grade countries in the Americas, with strong rule of law and respect for human rights consistent with our long-standing focus on environmental, social and governance ("ESG") principles;

-Commodity: Among the metals we produce, we believe copper has the best long-term supply/demand fundamentals and the greatest opportunities for sustained risk-adjusted returns. While our primary focus is on copper, we appreciate the polymetallic nature of deposits and, in particular, the counter-cyclical nature of gold production in our portfolio;

-Quality: We are focused on adding long-life, low-cost assets to our existing portfolio of high quality assets. Long life assets can capture peak pricing of multiple commodity price cycles and low cost assets can generate free cash flow even through the trough of price cycles;

-Potential: We consider the full spectrum of acquisition and investment opportunities from early-stage exploration to producing assets, but they must meet our stringent risk-adjusted criteria for growth and value creation. Regardless of the stage of development, we look for mineral assets that we believe offer significant incremental potential for exploration, development and optimization beyond the stated resources and mine plan;

-Process: Through a robust due diligence and capital allocation process, we develop a clear understanding of how we can create value from the investment or the acquired property through the application of our technical, social, operational and project execution expertise, as well as through the provision of necessary financial capacity and other operational optimization opportunities;

-Operatorship: We believe real value is created through leading efficient project development and operations. Hudbay's leadership team is well positioned to drive value and deliver effective capital allocation with our proven track record of successful project development and operational excellence.

-Financial: Investments and acquisitions should be accretive to Hudbay on a per share basis. Given that our strategic focus includes capital allocation to non-producing assets at various stages of development, when evaluating accretion, we will consider measures such as internal rate of return ("IRR"), return on invested capital ("ROIC"), net asset value per share and the contained value of reserves and resources per share.

2

Our key objectives for 2021 are to:

-Focus on operational efficiencies and maintain our low-costs of production to continue to generate positive cash flow and strong returns on invested capital;

-Execute development and commence mining activities at the high-grade Pampacancha satellite deposit, further enhancing Constancia's production and cost profile;

-Deliver the refurbishment of the New Britannia gold mill to significantly increase gold production from Lalor, completing the second phase of the Snow Lake gold strategy;

-Advance the appeals process and alternative options to unlock value at Rosemont;

-Progress the third phase of our Snow Lake gold strategy to further increase annual production scale by advancing studies to optimize recoveries, throughput, resource conversion and exploration;

-Maintain Constancia's industry-leading efficiency metrics by identifying areas of upside through continuous improvement initiatives at the mill and ongoing near-mine exploration;

-Drill regional copper exploration targets near Constancia, in northern Peru, and at Rosemont while continuing to advance exploration programs in the Snow Lake region, Peru and Nevada;

-Support our workforce, their families and the communities in which we operate through continuing to make health and safety a priority and providing ongoing COVID-19 support; and,

-Evaluate exploration, organic growth and acquisition opportunities that meet our stringent strategic criteria and allocate capital to pursue those opportunities that create sustainable value for the Company and our stakeholders.

3

SUMMARY

Fourth Quarter and Full Year Operating and Financial Results

-Achieved 2020 production and unit cost guidance in Peru and Manitoba; Manitoba copper production exceeded the top end of the guidance range and refined zinc metal production was higher than it has been in over ten years.

-Capitalized on higher gold prices as Manitoba annual gold sales volumes increased by 24% in 2020 compared to the prior year.

-Full production resumed at 777 on November 25 following a skip hoist incident in early October; shaft repair activities were completed well ahead of schedule and below expected costs.

-The Lalor mine and Stall concentrator both achieved record quarterly and annual production as 777 employees and equipment were redeployed to Lalor during the 777 shaft repair period.

-Constancia mine achieved excellent operational efficiencies during the quarter with a 16% increase in ore mined compared to the same quarter in 2019.

-Fourth quarter net earnings were $7.4 million or $0.03 per share. Fourth quarter adjusted net loss¹ per share was $0.06 and adjusted EBITDA¹ was $106.9 million.

-Operating cash flow before change in non-cash working capital increased to $86.1 million in the fourth quarter of 2020, from $69.1 million in the same quarter of 2019, due to higher realized copper and gold prices and higher gold sales volumes, partially offset by lower sales volumes of copper.

2021 Annual Guidance and Outlook

-Consolidated copper production is forecast to increase by 7%² in 2021, compared to 2020, with a further increase expected in 2022 with higher grades at the Pampacancha deposit in Peru.

-Consolidated gold production is forecast to increase by 62%² in 2021, compared to 2020, with a further increase expected in 2022 due to the first full year of production at the New Britannia mill and Pampacancha.

-2021 unit operating costs are expected to be modestly higher than 2020 with the inclusion of the New Britannia mill in Manitoba and higher input costs in Peru. Introduced new 2021 consolidated cash cost guidance of $0.65 to $0.80 and consolidated sustaining cash cost guidance of $2.05 to $2.30, in each case, per pound of copper produced, net of by-product credits¹.

-Updated mine plans will be issued for each of the Constancia and Snow Lake operations with our annual mineral reserve and resource update at the end of March 2021, incorporating the results from various optimization studies. The company will issue new three-year production guidance once the new mine plans are published.

-Total capital expenditures are expected to decline by 11%² year-over-year as a majority of the Peru growth spending was completed in 2020, while a portion of Manitoba growth spending was deferred from 2020 to 2021.

-Increased exploration spending in 2021 to drill promising targets in Arizona, Peru and Snow Lake.

Executing on Growth Initiatives

-Advanced the New Britannia gold mill refurbishment project to approximately 73% completion and the project continues to track ahead of the original schedule. Total project capital is tracking approximately $13.0 million over budget due to additions to the project scope and the impact of COVID-related costs. Commissioning of the gold plant is expected in mid-2021, three months earlier than originally planned. The new copper flotation facility is on track for commissioning and ramp-up in the fourth quarter of 2021. Operational readiness activities are progressing as planned with underground development of Lalor's gold-rich lenses well-advanced in preparation for the start-up of New Britannia.

4

-Successfully completed the Consulta Previa consultation process for Pampacancha and received the final mining permit for the development and operation of the mine. Pre-development activities commenced in early January and pre-stripping activities are expected to begin once the remaining individual land user agreement has been completed.

-Advanced the appeal of the unprecedented Rosemont court decision with oral arguments presented on February 1^st and continued to evaluate next steps for the project and advance drilling activities on our land package.

Summary of Fourth Quarter Results

Cash generated from operating activities in the fourth quarter of 2020 increased to $121.1 million compared to $98.7 million in the same quarter of 2019. Operating cash flow before change in non-cash working capital was $86.1 million during the fourth quarter of 2020, reflecting an increase of $17.0 million compared to the same period of 2019. The increase in operating cash flow is primarily the result of higher realized copper and gold prices and higher gold sales volume, partially offset by lower sales volumes of copper.

Copper-equivalent production in the fourth quarter of 2020 decreased by 15% compared to the same period in 2019 primarily as a result of lower copper grades at Constancia and lower production at 777 due to a shaft incident in October 2020 that resulted in a six-week suspension of hoisting operations.

Net earnings and earnings per share in the fourth quarter of 2020 were $7.4 million and $0.03, respectively, compared to a net loss and loss per share of $1.5 million and $0.01, respectively, in the fourth quarter of 2019. Fourth quarter earnings benefited from higher realized prices for base metals and gold which was partially offset by lower sales volumes of copper due to lower Constancia grades. In addition, we recorded a $28.0 million mark-to-market net gain on certain financial instruments, including a $40.3 million non-cash gain on the revaluation of the embedded derivative on our senior notes due in 2025. Partially offsetting these gains was the accounting effect related to the 777 production interruption. This resulted in fixed overhead production costs of $11.7 million, which would normally be capitalized to inventories, being immediately expensed as part of our cost of sales with no corresponding revenue benefit.

After adjusting for the 777 fixed overhead costs and the net mark-to-market gain on financial instruments, among other items, adjusted net loss¹ and adjusted EBITDA¹ in the fourth quarter of 2020 were $16.4 million, or $0.06 per share, and $106.9 million, respectively. This compares to an adjusted net loss and adjusted EBITDA of $24.6 million, or $0.09 per share, and $82.2 million, respectively, in the same period of 2019. The favourable movements in adjusted EBITDA and adjusted net loss, as compared to the fourth quarter of 2019, primarily included the same factors that benefited net earnings.

In the fourth quarter of 2020, consolidated cash cost per pound of copper produced, net of by-product credits¹, was $0.43, compared to $0.90 in the same period last year. The overall decrease in this measure was a result of higher by-product credit revenues mainly driven by a significant increase in Manitoba's gold revenue compared to the same period in 2019; this was partially offset by a decline in copper production at Constancia due to lower grades. Incorporating sustaining capital, capitalized exploration, royalties, selling, administrative and regional costs, consolidated all-in sustaining cash cost per pound of copper produced, net of by-product credits¹, in the fourth quarter of 2020 was $2.24, which increased slightly from $2.22 in the same period last year. The marginal increase in consolidated all-in sustaining cash cost was mostly a result of higher sustaining capital expenditures, as well as increased corporate selling and administrative costs due to higher stock-based compensation expense.

5

Summary of Full Year Results

Cash generated from operating activities decreased to $239.5 million in 2020 from $310.9 million in 2019. Operating cash flow before change in non-cash working capital decreased to $241.9 million from $307.3 million in 2019. The decrease is the result of significantly lower copper sales volumes due to an eight-week suspension of Constancia operations in Peru following a government declared state of emergency and a six-week production interruption at the 777 mine in Manitoba. The lower copper sales volumes were only partially offset by higher realized sales prices for copper and precious metals.

Net loss and loss per share for 2020 were $144.6 million and $0.55, respectively, compared to a net loss and loss per share of $343.8 million and $1.32, respectively, in 2019. The 2019 loss was mainly caused by an after-tax impairment charge of $242.1 million recorded in our investment in the Rosemont project. Gross margins declined in 2020 in part due to multi-week operational suspensions at Constancia and 777 causing certain fixed overhead production costs to be immediately expensed as part of our cost of sales with no corresponding revenue benefit. Consolidated cash costs per pound of copper produced, net of by-product credits, were 28% lower, mainly as a result of increased by-product credit revenues, partially offset by lower copper production from lower grades at Constancia and reduced Constancia production from the eight-week suspension of operations.

On a consolidated basis, our copper, zinc and precious metals production met 2020 guidance ranges. Production of copper in Manitoba exceeded the top end of the guidance range, while copper production in Peru was within the revised guidance range. When compared to 2019 production levels, 2020 copper production in Peru was lower due to  lower copper grades, as well as an eight-week suspension of Constancia operations due to a government declared state of emergency at the onset of the COVID-19 pandemic (which caused us to update our Peru guidance with our second quarter results). Combined unit costs in Peru and Manitoba were within 2020 guidance ranges. Total capital expenditures were above 2020 guidance in large part due to costs associated with individual land user agreements that were not included in the Company's initial growth capital guidance for Peru, as previously disclosed, due to the ongoing nature of the negotiations.

*Reflects Constancia temporary suspension of operations in April and May.

¹ Adjusted net loss and adjusted net loss per share, adjusted EBITDA, cash cost, all-in sustaining cash cost per pound of copper produced, net of by-product credits, and net debt are non-IFRS financial performance measures with no standardized definition under IFRS. For further information and a detailed reconciliation, please see the discussion under the "Non-IFRS Financial Reporting Measures" section of this MD&A.

² Year-over-year forecast changes assume the mid-point of the respective guidance range is achieved.

6

KEY FINANCIAL RESULTS

Financial Condition	Dec. 31, 2020	Dec. 31, 2019
(in $ thousands)
Cash and cash equivalents	439,135	396,146
Total long-term debt	1,135,675	985,255
Net debt1	696,540	589,109
Working capital	306,888	271,284
Total assets	4,666,645	4,461,057
Equity	1,699,806	1,848,123
1 Net debt is a non-IFRS financial performance measure with no standardized definition under IFRS. For further information and a detailed reconciliation, please see discussion under the "Non-IFRS Financial Reporting Measures" section of this MD&A.

Financial Performance	Three months ended				Year ended
(in $ thousands, except per share amounts)	Dec. 31, 2020		Dec. 31, 2019		Dec. 31, 2020		Dec. 31, 2019
Revenue	$	322,290	$	324,485	$	1,092,418	$	1,237,439
Cost of sales	287,923		298,852		1,053,418		1,085,897
Profit (loss) before tax	911		(42,352)		(179,089)		(452,763)
Net profit (loss)	7,406		(1,455)		(144,584)		(343,810)
Basic and diluted loss per share	0.03		(0.01)		(0.55)		(1.32)
Adjusted loss per share1	(0.06)		(0.09)		(0.46)		(0.18)
Operating cash flow before change in non-cash working capital2	86.1		69.1		241.9		307.3
Adjusted EBITDA1,2	106.9		82.2		306.7		358.5
1 Adjusted loss per share and adjusted EBITDA are non-IFRS financial performance measures with no standardized definition under IFRS. For further information and a detailed reconciliation, please see discussion under the "Non-IFRS Financial Reporting Measures" section of this MD&A.
2 In millions.

7

KEY PRODUCTION RESULTS

		Three months ended			Three months ended
		Dec. 31, 2020			Dec. 31, 2019
		Peru	Manitoba	Total	Peru	Manitoba	Total
Contained metal in concentrate produced 1
Copper	tonnes	21,554	5,724	27,278	26,659	5,763	32,422
Gold	oz	3,689	28,687	32,376	5,007	27,705	32,712
Silver	oz	477,775	252,904	730,679	631,774	298,363	930,137
Zinc	tonnes	-	25,843	25,843	-	30,592	30,592
Molybdenum	tonnes	333	-	333	372	-	372
Payable metal sold
Copper	tonnes	18,583	4,380	22,963	28,430	5,285	33,715
Gold	oz	3,297	31,882	35,179	4,824	25,520	30,344
Silver	oz	480,843	281,541	762,384	666,839	242,584	909,423
Zinc 2	tonnes	-	28,431	28,431	-	28,001	28,001
Molybdenum	tonnes	457	-	457	199	-	199
Cash cost 3	$/lb	1.47	(3.48)	0.43	1.36	(1.26)	0.90
Sustaining cash cost 3	$/lb	2.58	(0.36)	1.97	2.17	1.83	2.11
All-in sustaining cash cost3	$/lb			2.24			2.22

		Year ended			Year ended
		Dec. 31, 2020			Dec. 31, 2019
		Peru	Manitoba	Total	Peru	Manitoba	Total
Contained metal in concentrate produced 1
Copper	tonnes	73,150	22,183	95,333	113,825	23,354	137,179
Gold	oz	12,395	112,227	124,622	19,723	94,969	114,692
Silver	oz	1,622,972	1,127,901	2,750,873	2,504,769	1,080,561	3,585,330
Zinc	tonnes	-	118,130	118,130	-	119,106	119,106
Molybdenum	tonnes	1,204	-	1,204	1,272	-	1,272
Payable metal sold
Copper	tonnes	68,506	20,382	88,888	106,184	22,335	128,519
Gold	oz	10,986	111,963	122,949	18,956	90,043	108,999
Silver	oz	1,518,548	1,067,038	2,585,586	2,452,496	1,000,430	3,452,926
Zinc 2	tonnes	-	109,347	109,347	-	104,319	104,319
Molybdenum	tonnes	1,321	-	1,321	1,186	-	1,186
Cash cost 3	$/lb	1.45	(2.20)	0.60	1.16	(0.75)	0.83
Sustaining cash cost 3	$/lb	2.20	1.02	1.93	1.65	2.07	1.72
All-in sustaining cash cost3	$/lb			2.16			1.86
1 Metal reported in concentrate is prior to deductions associated with smelter contract terms.
2 Includes refined zinc metal sold.
3 Cash cost, sustaining cash cost and all-in sustaining cash cost per pound of copper produced, net of by-product credits are non-IFRS financial performance measures with no standardized definition under IFRS. For further information and a detailed reconciliation, please see the discussion under the "Non-IFRS Financial Reporting Measures" section of this MD&A.

8

RECENT DEVELOPMENTS

COVID-19 Business Update

The Company continues to manage and respond to the COVID-19 pandemic and has implemented preventative measures to ensure the safety of our workforce, their families, and the communities in which we operate. During the fourth quarter, production disruptions due to COVID-19 were minimal and there was no material impact on the delivery of goods to or from our operations. We continue to closely monitor the evolution of the pandemic in each of our operating regions and are reviewing and adapting our procedures based on the latest local situation. While we have had members of our workforce contract COVID-19, to date we have not identified cases of transmission within our workplaces, or transmission between rotational employees and local communities.

On January 26, 2021, the Peruvian government announced heightened restrictions in order to help mitigate the spread of COVID-19. Under these new measures, all provinces of Peru are categorized as High, Very High, or Extreme, with corresponding levels of restrictions, including daily curfews and restrictions on domestic travel. Parts of Lima and Cusco, two regions where we operate, are currently classified as Extreme and Very High, respectively. The new measures are expected to remain in place at least until February 28, 2021, at which point the government of Peru is expected to reevaluate the classifications and the associated restrictions.

On January 28, 2021, in an effort to continue to reduce the COVID-19 cases in the province, the Manitoba government issued a public health order mandating a 14-day self-isolation period for anyone returning or coming to Manitoba from all jurisdictions. This order provides certain allowances for workers travelling to work and is not expected to impact Hudbay's ability to maintain required workforce levels. Our protocols of testing and pre-screening incoming workers continue to be in effect.

Lalor Mine and the New Britannia Mill Refurbishment Update

The New Britannia refurbishment project is ahead of the original schedule. Overall project progress is approximately 73% complete. Construction of the new copper flotation building continues to advance as planned and construction of the pipeline between the New Britannia and Stall mills has been completed.

Total project spending on the New Britannia refurbishment project is forecast to be approximately $13.0 million higher than budget due to project scope additions and COVID-19 related costs, identified through a higher classification of the project capital estimate as the project nears completion. The additions to the project scope were as a result of changes to the Stall tailings pipeline configuration due to processing considerations, in addition to the implemented scope changes relating to the installation of temporary modular copper flotation cells to achieve early gold production at the gold plant. COVID-19 related costs are as a result of the additional costs associated with remote project management and pandemic safety protocols.

Refurbishment activities at the gold plant continue to remain ahead of the original schedule with commissioning expected to be completed in mid-2021. Ramp-up and first production at the gold plant is expected early in the third quarter of 2021. Copper flotation building construction activities are on track for commissioning and ramp-up during the fourth quarter of 2021.

9

Operational readiness activities in support of the early start-up of New Britannia are on track. Lalor continues to exceed underground development rates in gold-rich lenses 25 and 27, and in preparation for the mid-year startup of New Britannia, a stockpile of 12,000 tonnes of gold ore was established on surface during the fourth quarter of 2020. The gold ore stockpile is expected to grow over the first half of 2021 and supply sufficient feed to facilitate a quick ramp up of the gold plant.

Once the New Britannia mill is fully ramped-up, average annual gold production from Lalor is expected to increase to over 150,000 ounces commencing in 2022 at cash costs and sustaining cash costs, net of by-product credits, of approximately $480 and $655 per ounce, respectively, during the first eight years of the gold plant's operation.

Pampacancha Update

We completed the Pampacancha surface rights agreement with the local community of Chilloroya in February 2020. Throughout the remainder of the year, we focused on advancing the consultation process between the government and the Chilloroya community as per Peru's Consulta Previa law. Despite challenges presented by the pandemic, the Consulta Previa process was completed at the end of the year, and in early January 2021, we received the final mining permit for the development and operation of Pampacancha.             

In January 2021, Hudbay commenced limited pre-development activities for Pampacancha, including haul road construction and site preparation work. The company continues to advance discussions with the remaining land user family at Pampacancha. Pre-stripping activities are expected to commence once the remaining land user agreement has been completed.

In late January 2021, new COVID-19 restrictions were announced by the government of Peru. As a result of these restrictions and the need to complete the remaining land user agreements, we no longer expect to mine four million tonnes of ore from the Pampacancha deposit by June 30, 2021. If we fail to meet this milestone, we will be required to deliver an additional 8,020 ounces of gold to Wheaton Precious Metals ("Wheaton") in equal quarterly installments, at prevailing market prices, starting September 30, 2021. Hudbay and Wheaton are currently in discussions about, among other things, alternatives to defer the additional gold deliveries over the Pampacancha mine life.

Rosemont Update

The appeal of the unprecedented Rosemont court decision with the U.S. Court of Appeals for the Ninth Circuit ("Ninth Circuit") continues to advance with final briefs filed in November 2020 and the oral hearing completed in early February 2021. A decision from the Ninth Circuit is expected in the second half of 2021.

We have completed the initial drill program on our wholly owned private land located near Rosemont in a historic mining district called Helvetia. The focus of the program was to complete condemnation drilling for Rosemont and to test the Helvetia copper district for future exploration potential. The drill program consisted of 60 holes with several intersecting sulphide or oxide mineralization. Full assay results are pending.

Other Key Strategic Initiatives

Snow Lake Expansion Potential

10

We continue to advance various studies as part of phase three of our Snow Lake gold strategy. We expect to publish an updated mine plan for our Snow Lake operations with our annual mineral reserves and resources update at the end of March 2021. The updated mine plan is expected to incorporate the following upside opportunities:

•Increased Lalor Mine Production Rate - At the Lalor mine, we were pleased with the production increase achieved during the fourth quarter as a result of the allocation of additional mining resources from 777 to Lalor while the 777 shaft repairs were being completed. During this period, Lalor's mine output increased by an average of 650 tonnes per day above the normal level. The updated mine plan will contemplate a higher production rate at the Lalor mine after the 777 mine closes in mid-2022.

•1901 Deposit Prefeasibility Study - After releasing an upgraded resource estimate for the 1901 deposit in August 2020, we initiated engineering activities to develop a viable mine plan for the 1901 deposit that could supplement production from Lalor to take advantage of the future processing capacity of our mills in the Snow Lake region. The study will initially focus on the base metal zones with the gold zone in the inferred category remaining as future upside potential for the deposit.The results will be reflected in our updated mine plan for Snow Lake.

•Stall Recovery Improvement Study - We are exploring various technological enhancements at the Stall mill to potentially increase gold and copper recoveries, which could create further value for Lalor and the other deposits in the Snow Lake region.

We believe the updated mine plan will optimize our milling capacity in Snow Lake with an expected higher production rate at Lalor and the incorporation of the 1901 deposit into the operations. There remains the potential to  expand the New Britannia mill capacity beyond the currently planned 1,500 tonnes per day and this opportunity is expected to be examined in the future once the updated mine plan enhancements have been implemented.

Constancia Regional Exploration

We are evaluating and integrating the results from the recent drill programs at Constancia North into our annual mineral reserve and resource estimate update for Constancia at the end of March 2021. The drill program intersected copper porphyry and high-grade skarn mineralization within 300 metres of the northern edge of the current Constancia pit. The mineralization remains open to the north.

We continue to advance the regional exploration programs in Peru. In early 2021, we commenced drilling on the Quehuincha North high-grade skarn target located approximately 10 kilometres from Constancia's processing facilities. Exploration agreement discussions with the community of Uchucarcco on the Maria Reyna and Caballito properties are progressing. Maria Reyna is a prospective copper skarn-porphyry target and Caballito is a past-producing copper oxide mine, both of which are located within 10 kilometers north of Constancia. We also expect to commence drilling at our Llaguen property in the second quarter of 2021, after receiving all required drill permits in 2020. Llaguen is a copper porphyry target located in northern Peru, near the city of Trujillo and in close proximity to existing infrastructure.

Collective Bargaining Agreements

The three-year collective bargaining agreements with Hudbay's unionized workforces at each of our Peru and Manitoba operations expired on or about December 31, 2020. We are engaged in discussions with the labour unions in each jurisdiction as we work toward renewing the collective agreements.

Dividend Declared

A semi-annual dividend of C$0.01 per share was declared on February 18, 2021. The dividend will be paid out on March 26, 2021 to shareholders of record as of March 9, 2021.

11

CONSTANCIA OPERATIONS REVIEW

		Three months ended		Year ended		Guidance
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Annual
						2020 1	2021
Ore mined 2	tonnes	9,313,784	8,049,063	27,529,950	33,308,369
Copper	%	0.31	0.41	0.32	0.43
Gold	g/tonne	0.03	0.04	0.03	0.04
Silver	g/tonne	2.61	3.87	2.75	3.76
Molybdenum	%	0.01	0.02	0.02	0.02
Ore milled	tonnes	7,741,714	7,474,136	26,297,318	31,387,281
Copper	%	0.33	0.42	0.34	0.42
Gold	g/tonne	0.03	0.04	0.03	0.04
Silver	g/tonne	2.74	3.86	2.87	3.64
Molybdenum	%	0.02	0.02	0.02	0.02
Copper concentrate	tonnes	94,552	114,201	321,395	487,772
Concentrate grade	% Cu	22.80	23.34	22.76	23.34
Copper recovery	%	85.3	85.6	83.0	85.7
Gold recovery	%	52.7	50.0	49.8	48.1
Silver recovery	%	70.1	68.2	66.9	68.2
Molybdenum recovery	%	28.4	30.8	29.4	26.5
Combined unit operating costs3,4	$/tonne	10.17	10.20	9.46	9.50	8.30 - 10.00	8.90 - 10.90
1 Updated Peru guidance issued August 11, 2020.
2 Reported tonnes and grade for ore mined are estimates based on mine plan assumptions and may not reconcile fully to ore milled.
3 Reflects combined mine, mill and general and administrative ("G&A") costs per tonne of ore milled. Reflects the deduction of expected capitalized stripping costs.
4 Combined unit costs is a non-IFRS financial performance measure with no standardized definition under IFRS. For further information and a detailed reconciliation, please see the discussion under the "Non-IFRS Financial Reporting Measures" section of this MD&A.

The Constancia team continues to deliver strong operating performance despite the environment of strict ongoing COVID-19 measures and controls. We continue to work collaboratively with the local health authorities to ensure our workforce and partners adhere to our COVID-19 protocols while continuing to operate safely and efficiently.

The Constancia mine achieved excellent operational efficiencies during the quarter with a 16% increase in ore mined compared to the fourth quarter of 2019.

Ore milled during the fourth quarter of 2020 was 4% higher compared to the same period in 2019 due to the deferral of a fourth quarter plant maintenance shutdown to January 2021. This was partially offset by increased ore hardness that limited throughput, as compared to the same period in 2019. Milled gold, silver and copper grades in the fourth quarter were approximately 25%, 29% and 21% lower, respectively, than the same period in 2019. Copper recoveries in the fourth quarter of 2020 remained consistent with the same period in 2019 as the impact of lower grades was offset by lower contaminants in the current mining phase of the pit and flotation process improvements.

12

Combined mine, mill and G&A unit operating costs in the fourth quarter of 2020 were in line with the same period in 2019, primarily due to a higher volume of ore milled as a result of the delayed plant maintenance which led to reduced operating costs at the mill. This was partially offset by higher mining costs and lower capitalized stripping expenditures.

Full year combined unit operating costs were in line with 2019 as lower production, caused by an eight-week suspension of operations, was offset by a corresponding decrease in mine, mill and general and administrative costs.

Contained metal in concentrate produced		Three months ended		Year ended		Guidance
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Annual
						2020 1	2021
Copper	tonnes	21,554	26,659	73,150	113,825	65,000 - 75,000	72,000 - 88,000
Gold	oz	3,689	5,007	12,395	19,723	-	40,000 - 50,000
Silver	oz	477,775	631,774	1,622,972	2,504,769	-	1,800,000 - 2,170,000
Molybdenum	tonnes	333	372	1,204	1,272	1,100- 1,300	1,400 - 1,700
Precious metals2	oz	9,058	14,033	30,630	55,506	25,000 - 35,000	-
1 Updated Peru guidance issued August 11, 2020.
2 Precious metals production includes gold and silver production on a gold-equivalent basis. For 2019, silver is converted to gold at a ratio of 70:1. For 2020, silver is converted to gold at a ratio of 89:1.

In the fourth quarter of 2020, production of copper, gold and silver were 19%, 26%, and 24% lower, respectively, than the same period in 2019 due to lower grades. Full year 2020 production of copper, gold and silver were 36%, 37%, and 35% lower, respectively, compared to 2019, due to the same reasons as the fourth quarter variances as well as the suspension of operations in the second quarter of 2020.

Molybdenum production in the fourth quarter of 2020 was lower than the same period in 2019 due to lower ore grades and recoveries. Full year 2020 molybdenum production was also lower than the same period in 2019 due to the eight-week suspension of operations as well as lower grades, partially offset by higher recoveries.

Full year production of all metals and unit operating costs at Constancia achieved the revised full year guidance ranges for 2020.

13

*Reflects Constancia temporary suspension of operations in April and May.

Peru Cash Cost and Sustaining Cash Cost

		Three months ended		Year ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Cash cost per pound of copper produced, net of by-product credits1	$/lb	1.47	1.36	1.45	1.16
Sustaining cash cost per pound of copper produced, net of by-product credits1	$/lb	2.58	2.17	2.20	1.65
1 Cash cost and sustaining cash costs per pound of copper produced, net of by-product credits, are not recognized under IFRS. For more detail on these non-IFRS financial performance measures, please see the discussion under the "Non-IFRS Financial Performance Measures" section of this MD&A.

14

Cash cost per pound of copper produced, net of by-product credits, for the three months and year ended December 31, 2020 were $1.47 and $1.45, respectively. Cash cost increased 8% and 25%, respectively, compared to the same periods in 2019. The overall increase is primarily due to lower copper production caused by lower grades as we progress through the mine plan, and, in the case of full year 2020 copper production, an eight-week suspension of Constancia operations during the second quarter.

Sustaining cash cost per pound of copper produced, net of by-product credits increased by 19% compared to the fourth quarter of 2019, mainly due to the same factors noted above affecting cash costs as well as elevated sustaining capital spending in the fourth quarter of 2020 following a full ramp up of Constancia operations to normal levels in the second half of 2020. Sustaining cash cost increased 33% on a year-to-date basis, primarily due to the same factors noted above.

Metal Sold

		Three months ended		Year ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Payable metal in concentrate
Copper	tonnes	18,583	28,430	68,506	106,184
Gold	oz	3,297	4,824	10,986	18,956
Silver	oz	480,843	666,839	1,518,548	2,452,496
Molybdenum	tonnes	457	199	1,321	1,186

Quantities of payable metal sold for the year ended December 31, 2020 were lower than the same period in 2019 primarily for the same reasons that affected contained metal production as well as the relative timing of shipments.

15

MANITOBA OPERATIONS REVIEW

Mines

		Three months ended		Year ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Lalor
Ore	tonnes	468,101	390,140	1,654,240	1,536,780
Copper	%	0.80	0.80	0.74	0.75
Zinc	%	5.54	6.20	5.73	6.36
Gold	g/tonne	2.79	2.63	2.51	2.16
Silver	g/tonne	24.96	28.38	25.31	25.51
777
Ore	tonnes	164,856	269,342	991,576	1,109,782
Copper	%	1.89	1.17	1.40	1.37
Zinc	%	2.98	3.33	3.88	3.22
Gold	g/tonne	1.85	1.52	1.90	1.61
Silver	g/tonne	21.64	18.52	24.13	18.67
Total Mines
Ore	tonnes	632,957	659,482	2,645,816	2,646,562
Copper	%	1.08	0.95	0.98	1.01
Zinc	%	4.87	5.03	5.04	5.04
Gold	g/tonne	2.55	2.18	2.29	1.93
Silver	g/tonne	24.10	24.35	24.87	22.64

Unit Operating Costs1,2		Three months ended		Year ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Mines
Lalor	C$/tonne	98.74	99.90	96.51	104.42
777	C$/tonne	87.17	82.35	79.94	79.02
Total Mines	C$/tonne	95.73	92.73	90.30	93.77
1 Reflects costs per tonne of ore mined.
2 Unit costs is a non-IFRS financial performance measure with no standardized definition under IFRS. For further information and a detailed reconciliation, please see the discussion under the "Non-IFRS Financial Reporting Measures" section of this MD&A.

16

The Manitoba business unit had strong operating performance across the mines, mills and zinc plant during the fourth quarter despite the 777 shaft incident, which resulted in the suspension of hoisting operations for six weeks. In the face of the growing COVID-19 pandemic, we added new controls at the Snow Lake camp by introducing point of care PCR testing while maintaining the existing controls that were developed in the early part of the year. Our health and safety committees have continued to work collaboratively with local health units with a focus on keeping our employees and communities safe.

The coordinated business unit response to the 777 shaft incident focused on mitigating production losses by efficiently completing the repairs in the shaft, allowing the mine to return to normal operations quicker than expected.  A business continuity plan was established that relocated employees and equipment from 777 to Lalor and utilized Lalor's ramp to truck additional ore to surface from the upper parts of the mine at a rate of approximately 650 tonnes per day. This plan was successfully executed allowing Lalor to achieve record quarterly production, averaging over 5,000 tonnes per day in the quarter. Lalor continued to produce at a higher tonnage rate through the month of December mainly due to ongoing continuous improvement initiatives. 

Total unit operating costs for the mines during the fourth quarter of 2020 increased by 3% compared to the same period in 2019 mainly due to higher unit costs at 777 due to lower tonnage in the quarter. Full year total unit operating costs for the mines decreased by 4% due to lower Lalor unit costs. 

17

Processing Facilities

		Three months ended		Year ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Stall Concentrator
Ore	tonnes	372,624	310,622	1,412,751	1,290,300
Copper	%	0.79	0.80	0.73	0.73
Zinc	%	5.47	6.24	5.76	6.39
Gold	g/tonne	2.88	2.60	2.55	2.13
Silver	g/tonne	24.43	28.12	25.37	25.48
Copper concentrate	tonnes	14,271	10,930	47,680	40,856
Concentrate grade	% Cu	18.03	19.56	18.74	19.86
Zinc concentrate	tonnes	36,395	35,173	147,862	147,227
Concentrate grade	% Zn	50.89	49.96	50.57	51.04
Copper recovery	%	87.1	85.9	86.2	85.9
Zinc recovery	%	90.9	90.7	91.9	91.1
Gold recovery	%	59.5	61.1	60.0	56.8
Silver recovery	%	60.3	62.9	60.4	60.4
Contained metal in concentrate produced
Copper	tonnes	2,572	2,138	8,934	8,113
Zinc	tonnes	18,520	17,574	74,776	75,144
Precious metals1	oz	22,491	18,394	77,482	59,394
Flin Flon Concentrator
Ore	tonnes	225,663	374,529	1,205,314	1,362,006
Copper	%	1.59	1.11	1.28	1.27
Zinc	%	3.87	4.05	4.21	3.78
Gold	g/tonne	1.99	1.75	1.96	1.72
Silver	g/tonne	22.65	20.56	24.26	19.84
Copper concentrate	tonnes	13,900	15,640	57,658	65,508
Concentrate grade	% Cu	22.68	23.18	22.98	23.27
Zinc concentrate	tonnes	14,078	25,482	85,232	86,329
Concentrate grade	% Zn	52.02	51.09	50.87	50.92
Copper recovery	%	88.1	86.9	86.0	88.0
Zinc recovery	%	83.9	85.8	85.5	85.5
Gold recovery	%	56.6	56.1	56.0	59.4
Silver recovery	%	46.5	49.2	45.9	50.8
Contained metal in concentrate produced
Copper	tonnes	3,152	3,625	13,249	15,241
Zinc	tonnes	7,323	13,018	43,354	43,962
Precious metals1	oz	9,038	13,573	47,418	51,012
1 Precious metals production includes gold and silver production on a gold-equivalent basis.  For 2019, silver is converted to gold at a ratio of 70:1. For 2020, silver is converted to gold at a ratio of 89:1.

18

Unit Operating Costs1		Three months ended		Year ended		Guidance
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Annual
						2020	2021
Concentrators
Stall	C$/tonne	23.52	29.31	23.56	26.47
Flin Flon	C$/tonne	25.31	22.90	23.59	22.91
Combined mine/mill unit operating costs 2,3
Manitoba	C$/tonne	140	128	132	134	130 - 140	145 - 155
1 Reflects costs per tonne of milled ore.
2 Reflects combined mine, mill and G&A costs per tonne of milled ore.
3 Combined unit costs is a non-IFRS financial performance measure with no standardized definition under IFRS. For further information and a detailed reconciliation, please see the discussion under the "Non-IFRS Financial Reporting Measures" section of this MD&A.

19

The Stall concentrator achieved record throughput of 4,050 tonnes per day during the fourth quarter and approximately 3,870 tonnes per day on an annual basis. Ore processed during the fourth quarter of 2020 was 20% higher than the same period of 2019 as additional resources from 777 were deployed to Lalor and incremental ore mined was sent to Stall. Full year ore processed at Stall increased by 9% as a result of ongoing continuous improvement initiatives and higher ore availability from the Lalor mine as indicated above. Although Stall recoveries were generally below levels experienced during the first half of 2020, the trend of improving gold recoveries has continued when compared to the same periods in 2019 due to improved ore characteristics and numerous operational improvement projects implemented at the Stall mill.

Ore processed at the Flin Flon concentrator in the fourth quarter of 2020 decreased by 40% compared to the same period in 2019. This was due to the production interruption at 777, which resulted in less ore mined and available to feed the mill. Full year ore processed at the Flin Flon concentrator was 12% lower than 2019 primarily for the same reason as noted above.  Metal recoveries at the Flin Flon concentrator during 2020 were lower for all metals other than zinc, which was in line with prior year recoveries and metallurgical models given the head grades processed.

As a result of the increased ore availability from Lalor during the quarter, unit operating costs at Stall decreased by 20% compared to the same period in 2019, whereas unit operating costs at Flin Flon were 11% higher over the same period because of reduced ore mined from 777.

Manitoba combined mine, mill and G&A unit operating costs in the fourth quarter of 2020 increased by 9% compared to the same period in 2019, but remained within the annual guidance range despite the 777 production interruption. The increase was primarily due to less ore milled in Flin Flon during the fourth quarter. Full year combined mine, mill and G&A unit operating costs in 2020 were slightly lower than 2019 levels as the mines and mills continued to deliver efficient results despite the production interruption at 777.

Manitoba contained metal in concentrate produced1		Three months ended		Year ended		Guidance
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Annual
						2020	2021
Copper	tonnes	5,724	5,763	22,183	23,354	18,000 - 22,000	20,000 - 24,000
Gold	oz	28,687	27,705	112,227	94,969	-	150,000 - 165,000
Silver	oz	252,904	298,363	1,127,901	1,080,561	-	1,200,000 - 1,400,000
Zinc	tonnes	25,843	30,592	118,130	119,106	105,000 - 125,000	96,000 - 107,000
Precious metals2	oz	31,529	31,967	124,900	110,406	110,000 - 135,000	-
1 Metal reported in concentrate is prior to deductions associated with smelter terms.
2 Precious metals production includes gold and silver production on a gold-equivalent basis. For 2019, silver is converted to gold at a ratio of 70:1. For 2020, silver is converted to gold at a ratio of 89:1.

Gold production was 4% higher in the fourth quarter of 2020 due to higher head grades at Lalor as compared to the same period in 2019. Copper production during the quarter was consistent with prior year levels as the lost production during the 777 shaft repair period was offset by the mining of higher grade copper stopes when the mine was operating at normal levels. Silver and zinc production declined by 15% and 16%, respectively, in the fourth quarter of 2020 compared to the same quarter in 2019 primarily due to the 777 production interruption and lower head grades at Lalor.

Full year 2020 gold and silver production increased by 18% and 4%, respectively, due to higher gold and silver head grades and higher recoveries at Stall compared to prior year. Full year copper production decreased by 5% as reduced production at 777 was not fully offset by the higher throughput at Stall.

20

Despite the fourth quarter production interruption at the 777 mine, annual guidance for all metals and unit costs was achieved in Manitoba, with copper production exceeding the upper end of the guidance range.

Zinc Plant

Zinc Production		Three months ended		Year ended		Guidance
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Annual
						2020	2021
Zinc Concentrate Treated
Domestic	tonnes	61,395	58,884	241,089	217,484
Refined Metal Produced
Domestic	tonnes	28,818	27,816	111,637	103,340	100,000 - 112,000	96,000 - 103,000

Unit Operating Costs		Three months ended		Year ended		Guidance
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Annual
						2020	2021
Zinc Plant 1,2	C$/lb	0.45	0.48	0.47	0.49	0.45 - 0.52	0.50 - 0.55
1 Zinc unit operating costs include G&A costs.
2 Zinc unit costs is a non-IFRS financial performance measure with no standardized definition under IFRS. For further information and a detailed reconciliation, please see the discussion under the "Non-IFRS Financial Reporting Measures" section of this MD&A.

21

Production of cast zinc in the fourth quarter of 2020 was 4% higher than the same period in 2019 while operating costs per pound of zinc metal produced were 6% lower over the same period.Refined zinc metal production in the fourth quarter was not materially impacted by the 777 production interruption due to the processing of available zinc concentrate inventories. Full year 2020 refined zinc metal production increased by 8% compared to the same period in 2019 due to higher equipment availability coupled with higher concentrate availability. The 2020 refined zinc metal production was the highest level achieved in over 10 years.

Full year production of cast zinc and zinc plant unit operating cost were within guidance ranges for 2020.

Manitoba Cash Cost and Sustaining Cash Cost

		Three months ended		Year ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Cost per pound of copper produced
Cash cost per pound of copper produced, net of by-product credits 1	$/lb	(3.48)	(1.26)	(2.20)	(0.75)
Sustaining cash cost per pound of copper produced, net of by-product credits 1	$/lb	(0.36)	1.83	1.02	2.07
Cost per pound of zinc produced
Cash cost per pound of zinc produced, net of by-product credits 1	$/lb	(0.02)	0.34	0.10	0.42
Sustaining cash cost per pound of zinc produced, net of by-product credits 1	$/lb	0.67	0.92	0.71	0.97
1 Cash cost and sustaining cash cost per pound of copper & zinc produced, net of by-product credits, are not recognized under IFRS. For more detail on this non-IFRS financial performance measure, please see the discussion under the "Non-IFRS Financial Performance Measures" section of this MD&A.

Cash cost per pound of copper produced, net of by-product credits, in the fourth quarter of 2020 was negative $3.48. These costs were lower compared to the same period in 2019, primarily as a result of higher by-product credit revenues and lower milling costs. Cash cost per pound of copper produced, net of by-product credits was lower in 2020 compared to 2019 for the same reasons as noted above, but was partially offset by lower copper production.

Sustaining cash cost per pound of copper produced, net of by-product credits, in the fourth quarter of 2020 was negative $0.36. These costs were lower compared to the same period in 2019, primarily due to the reasons listed above offset by increased sustaining capital expenditures. Sustaining cash cost per pound of copper produced, net of by-product credits, were lower in 2020 compared to 2019, primarily due to the same reasons.

Cash cost and sustaining cash cost per pound of zinc produced, net of by-product credits, in the fourth quarter of 2020 were lower than the same period last year as a result of significantly higher by-product credits, lower milling costs, partially offset by lower production and higher sustaining capital expenditures.

Cash cost and sustaining cash cost per pound of zinc produced, net of by-product credits, were lower in 2020 compared to 2019 due to significantly higher by-product credits, partially offset by higher sustaining capital expenditures.

22

Metal Sold

		Three months ended		Year ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Payable metal in concentrate
Copper	tonnes	4,380	5,285	20,382	22,335
Gold	oz	31,882	25,520	111,963	90,043
Silver	oz	281,541	242,584	1,067,038	1,000,430
Refined zinc	tonnes	28,431	28,001	109,347	104,319

23

OUTLOOK

This outlook includes forward-looking information about our operations and financial expectations based on our expectations and outlook as of February 18, 2021. As a result of the COVID-19 global pandemic, we have experienced operational, supply chain, travel, labour and shipping disruptions, and we may continue to experience similar disruptions in the future. Given the uncertainty of the duration and magnitude of the impact of COVID-19, including its impact on the development timeline for Pampacancha, our 2021 production and cost guidance are subject to a higher-than-normal degree of uncertainty. The guidance below does not reflect any potential for additional suspensions or other significant disruption to operations or delays to development activities.

This outlook, including expected results and targets, is subject to various risks, uncertainties and assumptions, which may impact future performance and our achievement of the results and targets discussed in this section. For additional information on forward-looking information, refer to the "Forward-Looking Information" section of this MD&A. We may update our outlook depending on changes in metals prices and other factors, as per our "Commodity Markets" and "Sensitivity Analysis" discussions below. In addition to this section, refer to the "Operations Review", "Financial Review" and "Liquidity and Capital Resources" sections for additional details on our outlook for 2021.

Material Assumptions

Our annual production and operating cost guidance, along with our annual capital and exploration expenditure forecasts are discussed in detail below.

24

Production Guidance

Contained Metal in Concentrate1		2021 Guidance	Year ended Dec. 31, 2020	2020 Guidance2
Peru
Copper	tonnes	72,000 - 88,000	73,150	65,000 - 75,000
Gold3	oz	40,000 - 50,000	12,395	-
Silver3	oz	1,800,000 - 2,170,000	1,622,972	-
Molybdenum	tonnes	1,400 - 1,700	1,204	1,100 - 1,300
Precious metals3	oz	-	30,630	25,000 - 35,000
Manitoba
Zinc	tonnes	96,000 - 107,000	118,130	105,000 - 125,000
Gold3	oz	150,000 - 165,000	112,227	-
Copper	tonnes	20,000 - 24,000	22,183	18,000 - 22,000
Silver3	oz	1,200,000 - 1,400,000	1,127,901	-
Precious metals3	oz	-	124,900	110,000 - 135,000
Total
Copper	tonnes	92,000 - 112,000	95,333	83,000 - 97,000
Gold3	oz	190,000 - 215,000	124,622	-
Zinc	tonnes	96,000 - 107,000	118,130	105,000 - 125,000
Silver3	oz	3,000,000 - 3,570,000	2,750,873	-
Molybdenum	tonnes	1,400 - 1,700	1,204	1,100 - 1,300
Precious metals3	oz	-	155,530	135,000 - 170,000
1 Metal reported in concentrate is prior to refining losses or deductions associated with smelter terms.
2 Original 2020 guidance for Peru was revised on August 11, 2020 to account for a government-mandated temporary mine closure.
3 Precious metals production includes gold and silver production on a gold-equivalent basis and is only reported for 2020 since separate guidance for each of gold and silver was introduced in 2021. For 2020, silver is converted to gold at a ratio of 89:1.

On a consolidated basis, we met 2020 production guidance for all metals, and copper production exceeded the guidance range in Manitoba. Consolidated copper production was 6% higher than the mid-point of the guidance range due to strong performance at the Constancia operations in the second half of the year and the mining of higher copper grade stopes at 777.

In 2021, consolidated copper production is forecast to increase by 7%¹ compared to 2020 production primarily as a result of higher expected copper production in Peru, given 2020 production was impacted by an eight-week temporary mine interruption related to a government-declared state of emergency. Consolidated gold production in 2021 is expected to increase by 62%¹ year-over-year due to higher gold production in both Manitoba and Peru. In Manitoba, gold production is expected to increase by 40%¹ in 2021 due to the planned early startup of the New Britannia gold mill. In Peru, gold production is expected to more than triple in 2021 as we expect to see the benefits from the higher grades at the Pampacancha satellite deposit. Zinc production is expected to decline by 14%¹ year-over-year as a result of prioritizing the mining of the gold-rich zones at Lalor in connection with the early startup of the New Britannia mill, which will result in mining less of the zinc-rich base metal zones at Lalor.

^{__________________________________
1} Year-over-year forecast changes assume the mid-point of the respective guidance range is achieved.

25

Peru's 2021 production guidance assumes mining of Pampacancha will begin in the second quarter, with the initial phase of lower copper grades, but higher gold grades, expected to continue for the balance of the year before higher copper grades are forecast to enter the mine plan in 2022. Manitoba's 2021 production guidance reflects an increase in Lalor's mine throughput to 4,650 tonnes per day, from the previous 4,500 tonnes per day, as the recent trend of stronger production from the mine is expected to continue.

We expect to publish updated mine plans for each of our Constancia and Snow Lake operations with our annual mineral reserve and resource update at the end of March 2021, as discussed in the "Strategy" section in this MD&A. The new Constancia mine plan is expected to reflect an increase in copper and gold production from 2022 to 2025 as the higher grades from the Pampacancha deposit enter the mine plan. This is expected to offset the lost copper production from the 777 closure in mid-2022 and enable a steady state in Hudbay's consolidated copper production. The new Constancia mine plan will incorporate new reserves from the Constancia North property, which will extend the Constancia pit. The new mine plan will also include updated unit cost assumptions based on recent operational and business activities. The new Snow Lake mine plan is expected to reflect an increase in Lalor's mine production rate beyond 4,650 tonnes per day, and incorporate the results of the 1901 prefeasibility study and the Stall mill recovery improvement study. Given the pending mine plan updates, we expect to issue our new three-year production outlook once the updated mine plans have been released.

26

Capital Expenditure Guidance

Capital Expenditures1 (in $ millions)	2021 Guidance	Year ended Dec. 31, 2020	2020 Guidance2
Sustaining capital
Peru3	135.0	91.1	80.0
Manitoba	90.0	95.3	100.0
Total sustaining capital	225.0	186.4	180.0
Growth capital
Peru4	5.0	107.0	70.0
Manitoba	75.0	61.4	80.0
Arizona5	20.0	15.6	20.0
Total growth capital	100.0	184.0	170.0
Capitalized exploration	15.0	11.9	15.0
Total capital expenditures	340.0	382.3	365.0
1 Excludes capitalized costs not considered to be sustaining or growth capital expenditures. Capital expenditures are converted into U.S. dollars using the following rates: 1.30 Canadian dollars and 3.45 Peruvian soles.
2 Original 2020 guidance for Peru was revised on August 11, 2020 to account for a government-mandated temporary mine closure.
3 Includes capitalized stripping costs and Pampacancha capital after pre-stripping.
4 Peru growth capital expenditures guidance of $70.0 million in 2020 related to expected expenditures for developing the Pampacancha deposit and acquiring surface rights, but excluded any costs related to the individual land user agreements due to the ongoing nature of the negotiations. The actual costs incurred in 2020 included the costs for acquiring the surface rights and amounts committed under the land user agreements completed during 2020. A portion of the development expenditures was deferred to 2021. Peru growth capital guidance of $5.0 million includes the project development expenditures but excludes the additional costs related to the remaining individual land user agreements.
5 Arizona spending includes capitalized costs associated with the Rosemont project.

Total capital expenditures are expected to decline by 11% year-over-year primarily due to lower expected growth spending in Peru in 2021.

Total sustaining capital expenditures in 2021 are expected to increase from 2020 levels primarily due to the deferral of heavy civil works and capitalized stripping expenditures in Peru from 2020 into 2021, partially offset by expected lower sustaining spending in Manitoba. A tailings dam raise is underway at Constancia and the associated heavy civil works accounts for a significant portion of the 2021 sustaining costs in Peru. Also, a portion of the Pampacancha heavy civil works, previously classified as growth capital, has been reclassified to sustaining capital expenditures in 2021. It is expected that Peru sustaining capital expenditures will begin to decline in 2022.

27

In Manitoba, we continue to implement improvements on the legacy Flin Flon tailings impoundment area, in line with the higher industry-wide standards for tailings dam safety. Spending under the tailings upgrade program is expected to average approximately $20.0 million per year from 2020 to 2022. These expenditures will not impact sustaining capital expenditures since they are associated with the decommissioning and restoration liability, and therefore, will be accounted for as a drawdown of the liability through operating cash flow.

Manitoba growth capital spending of $75.0 million in 2021 includes approximately $70.0 million for the completion of the New Britannia mill refurbishment project and approximately $5.0 million for the construction of a new long-term camp facility in Snow Lake. Manitoba growth capital spending in 2020 was lower than expected due to the deferral of approximately $20.0 million into 2021, despite the New Britannia refurbishment project continuing to track ahead of the original schedule. Total project spending on the New Britannia refurbishment project in 2021 includes an approximate $13.0 million increase in project costs as a result of the completion of a definitive estimate that incorporates project scope additions and COVID-19 related costs.

Peru growth capital spending of $5.0 million in 2021 includes a portion of the Pampacancha project development expenditures that was deferred from 2020, but excludes the costs associated with completing the remaining individual land user agreement due to the ongoing nature of the negotiations. As stated previously, the 2020 Peru growth capital guidance similarly excluded the land user agreement costs; however, a significant portion of the actual growth expenditures incurred in 2020 related to costs associated with land user agreements completed during the year. 

Exploration Guidance

Exploration Expenditures (in $ millions)		Year ended
	2021 Guidance	Dec. 31, 2020	2020 Guidance
Peru	20.0	14.3	15.0
Manitoba	10.0	10.1	10.0
Arizona and other	10.0	4.7	-
Total exploration expenditures	40.0	29.1	25.0
Capitalized spending	(15.0)	(11.9)	(15.0)
Total exploration expense	25.0	17.2	10.0

Our total exploration spending in 2021 is expected to be higher than 2020 levels as we plan to conduct additional drilling activities in Peru and Arizona.

In Peru, 2021 drilling activities will be focused on the Quehuincha North skarn target property located approximately 10 kilometres north of Constancia, and on the Llaguen greenfield project located near the city of Trujillo in northern Peru. In Manitoba, we expect to complete a winter drill program focused on expanding the 1901 deposit and testing drill targets identified between 1901 and the Lalor mine. In Arizona, we plan to continue the drilling activities in the Helvetia copper region, in addition to a portion of exploration expenditures allocated for generative purposes.

Unit Operating Cost Guidance

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Combined Mine/Mill Unit Operating Cost1,2		2021 Guidance	Year ended Dec. 31, 2020	2020 Guidance3
Peru	$/tonne	8.90 - 10.90	9.46	8.30 - 10.00
Manitoba	C$/tonne	145 - 155	132	130 - 140
1 Reflects combined mine, mill and G&A costs per tonne of milled ore. Peru costs reflect the deduction of expected capitalized stripping costs.
2 Combined unit costs are non-IFRS financial performance measures with no standardized definition under IFRS. For further information and a detailed reconciliation, please see the discussion under the "Non-IFRS Financial Reporting Measures" section of this MD&A.
3  Original 2020 guidance for Peru was revised on August 11, 2020 to account for a government-mandated temporary mine closure.

Combined unit costs for Manitoba in 2021 are forecast to be modestly higher than 2020 levels due to the reduction in capitalized underground development at both 777 and Lalor, which increases the portion of mining costs that are expensed and included in unit costs. In addition, combined unit costs in Manitoba are expected to trend higher with the inclusion of the New Britannia mill given the New Britannia milling unit costs are higher than the Flin Flon and Stall milling costs as disclosed in our Snow Lake operations mine plan released in March 2020. Combined unit costs for Peru in 2021 are approximately 5%¹ higher than 2020 as a result of higher consumable and mill maintenance costs and the impact of blasting harder ore in the Constancia pit.

Flin Flon Zinc Plant Guidance		2021 Guidance	Year ended Dec. 31, 2020	2020 Guidance
Zinc metal produced	tonnes	96,000 - 103,000	111,637	100,000 - 112,000
Unit operating costs1	C$/lb	0.50 - 0.55	0.47	0.45 - 0.52
1 Unit costs are non-IFRS financial performance measures with no standardized definition under IFRS. For further information and a detailed reconciliation, please see the discussion under the "Non-IFRS Financial Reporting Measures" section of this MD&A.

Cash Cost and Sustaining Cash Cost Guidance

Consolidated Cash Cost per pound of copper produced1,2		2021 Guidance	Year ended Dec. 31, 2020	2020 Guidance3
Cash cost	$/lb	0.65 - 0.80	0.60	-
Sustaining cash cost	$/lb	2.05 - 2.30	1.93	-
1 Cash cost and sustaining cash cost, net of by-product credits, per pound of copper contained in concentrate. By-product credits are calculated using the gold and silver deferred revenue drawdown rates in effect on December 31, 2020 and the following commodity prices: $1.07 per pound zinc (includes premium), $1,800 per ounce gold, $21.00 per ounce silver, $8.00 per pound molybdenum and an exchange rate of 1.30 C$/US$.
2 Cash cost and sustaining cash cost are non-IFRS financial performance measures with no standardized definition under IFRS. For further information and a detailed reconciliation, please see the discussion under the "Non-IFRS Financial Reporting Measures" section of this MD&A.
3 Cash cost and sustaining cash cost guidance was introduced in 2021 and is not available for 2020.

We are introducing consolidated cash cost and sustaining cash cost guidance in 2021. Consolidated cash cost per pound of copper produced, net of by-product credits, is expected to slightly increase from 2020 levels due to the expected increase in unit costs as described above, partially offset by expected higher copper production and higher by-product credits. Consolidated sustaining cash cost per pound of copper produced, net of by-product credits, is expected to be consistent with 2020 as lower sustaining capital expenditures are expected to offset the increase in cash costs.

Metal production in any particular quarter may vary from the implied annual guidance rate based on variations in grades and recoveries due to the areas mined in that quarter, the timing of planned maintenance, and other factors. Mining and processing costs in any particular quarter can vary from the annual guidance rate above based on a variety of factors, including the scheduling of maintenance events and seasonal heating requirements, particularly in Manitoba. Cash cost and sustaining cash cost may also vary based on changes in commodity prices affecting by-product credits. In Peru, the regularly scheduled semi-annual mill maintenance shutdowns at Constancia are expected to occur during the first and third quarters of 2021.

29

Commodity Markets

Our 2021 operational and financial performance will be influenced by a number of factors. At the macro-level, the general performance of the Chinese, North American and global economies as they recover from the COVID-19 related shutdowns will influence the demand for copper and zinc, while interest rates, investor expectations of future inflation, the performance of financial markets and the level of economic uncertainty will influence the investment demand for gold. The realized prices we achieve in the commodity markets significantly affect our financial performance. Our general expectations regarding metals prices and foreign exchange rates are included below and in the "Sensitivity Analysis" section of this MD&A.

In addition to our production volumes, our financial performance is directly affected by a number of factors, including metals prices, foreign exchange rates, and input costs, including energy prices. Average prices for copper and zinc were far more volatile in 2020 than they were in 2019 due to the adverse effect of the COVID-19 pandemic on the world economy. Government mandated lockdowns and a rapid decline in the value of all assets drove copper and zinc prices to multiyear lows in the first quarter of 2020 before temporary supply side disruptions and scrap shortages, central bank liquidity injections and improved market sentiment propelled prices, especially copper, to levels significantly higher than prior to the pandemic. Gold prices, except for a brief decline in March 2020 when all asset prices suffered steep declines, moved higher through the last three quarters of the year due to the COVID-19 crisis and the world's response to it.

We have developed the following market analysis from various information sources including analyst and industry experts.

Copper

In 2020, the London Metal Exchange ("LME") copper price averaged $2.80 per pound ("/lb"), with prices ranging from a low of $2.09/lb during the depths of the initial COVID-19 crisis in March 2020 to a high of $3.61/lb in December 2020. Both the supply and the demand for copper declined significantly in 2020 due to government mandated lockdowns globally. Many mines in the world, especially those in Latin America, were forced to temporarily suspend operations for one to two months resulting in a production loss of over 500 thousand tonnes of copper in concentrate. In addition, the supply of scrap copper, which typically accounts for 16% of annual refined copper production, declined by approximately 980 thousand tonnes. At the same time, the pandemic temporarily reduced the fundamental demand for copper but the Chinese government's purchases of copper for their strategic stockpile  combined with a unexpectedly robust recovery in fundamental demand in China in the second half of 2020, brought the market into relative balance, supporting a strong price recovery in the second half of the year. Copper smelters and refineries were generally less affected by COVID-19 related shutdowns than other segments of the copper market, which kept spot treatment and refining costs for copper concentrate below annual benchmark levels for most of the year. This led to further decreases in annual benchmark terms to $59.50/tonne and ¢5.95/lb for 2021.

Early in 2021, the price of copper has been in excess of $3.50/lb and market sentiment has been quite positive. However, the outlook for global refined copper markets and copper prices in 2021 is uncertain due to the continued threat of interruptions to both copper supply and demand posed by the ongoing COVID-19 pandemic. What is relatively certain is that the economic disruption caused by the pandemic has caused governments around the world to commit to massive spending on a wide variety of "green" recovery plans, all of which involve copper intensive technologies. Over the next decade, the world economy is expected to move towards renewable energy sources (wind, hydro, solar), carbon neutrality and the adoption of electric vehicles, which is projected to drive significant additional demand for copper.

30

Strong future demand for copper will necessitate the development of new mines from the world's existing inventory of undeveloped deposits, which are inherently higher cost than those mines currently in production due to their lower grades, higher strip ratios and higher development costs. The result of having to bring on higher cost mines to meet increasing demand, in conjunction with the long timelines associated with permitting and obtaining social license for new greenfield mines, should lead to a prolonged period of higher copper prices.

Zinc

In 2020, the LME zinc price averaged $1.03/lb, with prices ranging from $0.80/lb to $1.29/lb. Zinc demand declined by an estimated 5.5% due to the effects of COVID-19 induced consumption disruptions but mine production declined  by only 3.5% during the year. As a result, after recording an average deficit of approximately 370 thousand tonnes per year over the previous eight years prior to 2020,  the zinc metal market recorded a surplus of approximately 460 thousand tonnes in 2020 and total exchange stocks rose in early 2021.

As world economies recover from COVID-19 in 2021, demand for zinc is projected to rebound with the help of significant government stimulus spending on infrastructure which is expected to spur demand for zinc used in the galvanizing of steel. For the next several years, the zinc metal market is anticipated to be in relative balance and zinc metal prices over the next few years are expected to be supported in the range of $1.00/lb to $1.25/lb.

After recording a small, unexpected zinc concentrate market deficit versus demand in 2020, which kept spot treatment charges during the year well below the annual benchmark of $300 per tonne, the zinc concentrate market is expected to return to surplus over the next several years. Negotiations for the 2021 annual benchmark are still ongoing with a large gap between the positions of miners and smelters.

Gold

In 2020, the London Gold Bullion Market price for gold averaged $1,772 per ounce ("/oz"), compared with an average of $1,394/oz in 2019. Prices ranged from a low of $1,461/oz, set during March 2020 when all asset classes suffered steep declines during the onset of the COVID-19 crisis, to a high of $2,064/oz at its peak in early August. The dramatic escalation in gold prices during the year was driven by the economic uncertainty surrounding the COVID-19 pandemic as well as the response to the crisis from governments and central banks globally who engaged in massive deficit spending to support their citizens, reducing interest rates to near zero, and injecting massive liquidity into the financial system, all of which are expected to lead to future inflation.

The physical supply and demand for gold is not an arbitrator of future prices as it is with base metals because most of the gold ever mined is stored in bank vaults. Gold is an investment that has traditionally provided a safe haven for investors during uncertain economic times, as well as a hedge against inflation, future currency devaluation and declining values of other riskier asset classes. The current economic environment, with a perception of "lower for longer" interest rates, high government deficits and continued economic uncertainly due to the COVID-19 pandemic, is expected to be supportive for gold prices over the next few years.

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Sensitivity Analysis

The following table displays the estimated impact of changes in metals prices and foreign exchange rates on our 2021 net profit, earnings per share and operating cash flow, assuming that our operational performance is consistent with our guidance for 2021¹. The effects of a given change in an assumption are calculated in isolation.

	2021	Change of 10%	Impact on	Impact on	Impact on Operating CF
	Base	represented by:	Profit	EPS1	before WC changes
Metals Prices
Copper price2	$3.00/lb	+/-  $0.30/lb	+/-  $43M	+/-  0.17	+/-  $63M
Zinc price	$1.00/lb	+/-  $0.10/lb	+/-  $17M	+/-  0.06	+/-  $22M
Gold price3	$1,800/oz	+/-  $180/oz	+/-  $19M	+/-  0.07	+/-  $26M
Exchange Rates 4
US$/C$	1.30	+/- 0.13	+/-  $49M	+/-  0.19	+/-  $35M
1 Based on 261.3 million common shares outstanding as at December 31, 2020.
2 Quotational period hedging program neutralizes provisional pricing adjustments.
3 Gold price sensitivity also includes an impact of a +/- 10% change in the silver price (2021 assumption: $21.00/oz of silver).
4 Change in profit from operational performance only, does not include change in profit arising from translation of balance sheet accounts.

^{___________________________
1} Year-over-year forecasted changes to unit costs assume the mid-point of the respective guidance range is achieved.

32

FINANCIAL REVIEW

Financial Results

In the fourth quarter of 2020, we recorded a net profit of $7.4 million compared to a net loss of $1.5 million for the same period in 2019, representing an increase in profit of $8.9 million. For the full year, we recorded a loss of $144.6 million compared to a loss of $343.8 million in 2019, representing an increase in profit for the period of $199.2 million.

The following table provides further details on these variances:

(in $ millions)	Three months ended December 31, 2020	Year ended December 31, 2020
Increase (decrease) in components of profit or loss:
Revenues	(2.2)	(145.0)
Cost of sales
Mine operating costs	15.6	49.8
Depreciation and amortization	(4.6)	(17.3)
Selling and administrative expenses	(9.0)	(5.2)
Exploration and evaluation expenses	3.3	13.6
Other expenses	(2.1)	33.5
Impairment	-	322.2
Net finance expense	42.3	22.1
Tax	(34.4)	(74.5)
Increase in profit for the period	8.9	199.2

Revenue

Revenue for the fourth quarter of 2020 was $322.3 million, $2.2 million lower than the same period in 2019, due mostly to lower sales volumes of copper primarily from lower copper production at Constancia, partially offset by higher realized copper, gold and zinc prices as well as higher sales volumes of gold.

Full year revenue in 2020 was $1,092.4 million, $145.0 million or 12% lower than 2019, primarily as a result of significantly lower copper sales volumes in Peru as a result of an eight-week suspension of Constancia operations in the second quarter and lower copper grades as well as lower realized zinc prices. This was partially offset by higher realized gold and copper prices, a variable consideration adjustment on stream revenue as well as lower comparative treatment and refining charges.

33

(in $ millions)	Three months ended December 31, 2020	Year ended December 31, 2020
Metals prices1
Higher copper prices	30.3	24.8
Higher (lower) zinc prices	4.5	(32.7)
Higher gold prices	8.6	42.3
(Lower) higher silver prices	(0.1)	1.0
Sales volumes
Lower copper sales volumes	(63.9)	(238.5)
Higher zinc sales volumes	1.3	12.3
Higher gold sales volumes	7.2	20.1
Lower silver sales volumes	(4.0)	(22.2)
Other
Change in derivative mark-to-market on zinc	0.1	0.7
Molybdenum and other volume and pricing differences	7.3	(2.5)
Variable consideration adjustments	-	23.0
Effect of lower treatment and refining charges	6.5	26.7
Decrease in revenue in 2020 compared to 2019	(2.2)	(145.0)
1 See discussion below for further information regarding metals prices.

Our revenue by significant product type is summarized below:

	Three months ended		Year ended
(in $ millions)	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Copper	167.0	201.7	563.9	786.3
Zinc	76.6	72.1	264.1	284.9
Gold	49.2	37.2	181.0	120.4
Silver	8.0	8.5	26.0	29.3
Molybdenum	8.8	4.7	25.6	31.3
Other metals	1.6	1.3	5.6	4.8
Revenue from contracts	311.2	325.5	1,066.2	1,257.0
Amortization of deferred revenue - gold	8.4	7.9	27.9	32.0
Amortization of deferred revenue - silver	11.7	16.0	39.4	60.4
Amortization of deferred revenue - variable consideration adjustments - prior periods	-	-	6.7	(16.3)
Pricing and volume adjustments1	5.7	(3.7)	9.1	(12.1)
Treatment and refining charges	(14.7)	(21.2)	(56.9)	(83.6)
Revenue	322.3	324.5	1,092.4	1,237.4
1 Pricing and volume adjustments represents mark-to-market adjustments on provisionally prices sales, realized and unrealized changes to fair value for non-hedge derivative contracts and adjustments to originally invoiced weights and assays.

For further detail on variable consideration adjustments, refer to note 18 of our consolidated financial statements.

34

Realized sales prices

This measure is intended to enable management and investors to understand the average realized price of metals sold to third parties in each reporting period. The average realized price per unit sold does not have any standardized meaning prescribed by IFRS, is unlikely to be comparable to similar measures presented by other issuers and should not be considered in isolation or a substitute for measures of performance prepared in accordance with IFRS.

For sales of copper, gold and silver we may enter into non-hedge derivatives ("QP hedges") which are intended to manage the provisional pricing risk arising from quotational period terms in concentrate sales agreements. The QP hedges are not removed from the calculation of realized prices. We expect that gains and losses on QP hedges will offset provisional pricing adjustments on concentrate sales contracts.

Our realized prices for the fourth quarter and full year 2020 and 2019, respectively, are summarized below:

			Realized prices1 for the		LME YTD 20202	Realized prices1 for the
			Three months ended			Year ended
		LME QTD 20202	Dec. 31, 2020	Dec. 31, 2019		Dec. 31, 2020	Dec. 31, 2019
Prices
Copper	$/lb	3.25	3.29	2.69	2.80	2.86	2.73
Zinc3	$/lb	1.19	1.24	1.17	1.03	1.10	1.24
Gold4	$/oz		1,734	1,490		1,783	1,439
Silver4	$/oz		27.05	27.19		26.04	25.64
1 Realized prices exclude refining and treatment charges and are on the sale of finished metal or metal in concentrate. Realized prices include the effect of provisional pricing adjustments on prior period sales.
2 London Metal Exchange average for copper and zinc prices.
3 All sales for the three months and year ended December 31, 2020 and 2019 were cast zinc metal. Zinc realized prices include premiums paid by customers for delivery of refined zinc metal, but exclude unrealized gains and losses related to non-hedge derivative contracts that are included in zinc revenues.
4 Sales of gold and silver from our 777 and Constancia mines are subject to our precious metals stream agreement with Wheaton Precious Metals, pursuant to which we recognize deferred revenue for precious metals deliveries and also receive cash payments. Stream sales are included within realized prices and their respective deferred revenue and cash payment rates can be found on page 36.

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The following tables provide a reconciliation of average realized price per unit sold, by metal, to revenues as shown in the consolidated financial statements.

Three months ended December 31, 2020
(in $ millions) 1	Copper	Zinc	Gold	Silver	Molybdenum	Other	Total
Revenue per financial statements	167.0	76.6	49.2	8.0	8.8	1.6	311.2
Amortization of deferred revenue	-	-	8.4	11.7	-	-	20.1
Pricing and volume adjustments2	(0.6)	1.0	3.4	0.9	1.0	-	5.7
By-product credits 3	166.4	77.6	61.0	20.6	9.8	1.6	337.0
Derivative mark-to-market 4	-	0.2	-	-	-	-	0.2
Revenue, excluding mark-to-market on non-QP hedges	166.4	77.8	61.0	20.6	9.8	1.6	337.2
Payable metal in concentrate sold 5	22,963	28,431	35,179	762,384	457	-	-
Realized price 6	7,245	2,737	1,734	27.05	-	-	-
Realized price 7	3.29	1.24	-	-	-	-	-
Year ended December 31, 2020
(in $ millions) 1	Copper	Zinc	Gold	Silver	Molybdenum	Other	Total
Revenue per financial statements	563.9	264.1	181.0	26.0	25.6	5.6	1,066.2
Amortization of deferred revenue	-	-	27.9	39.4	-	-	67.3
Pricing and volume adjustments2	(4.2)	1.0	10.4	1.9	0.0	-	9.1
By-product credits 3	559.7	265.1	219.3	67.3	25.6	5.6	1,142.6
Derivative mark-to-market 4	-	(0.7)	-	-	-	-	(0.7)
Revenue, excluding mark-to-market on non-QP hedges	559.7	264.4	219.3	67.3	25.6	5.6	1,141.9
Payable metal in concentrate sold 5	88,888	109,347	122,949	2,585,586	1,321	-	-
Realized price 6	6,297	2,418	1,783	26.04	-	-	-
Realized price 7	2.86	1.10	-	-	-	-	-
1 Average realized price per unit sold may not calculate based on amounts presented in this table due to rounding.
2 Pricing and volume adjustments represents mark-to-market adjustments on provisionally priced sales, realized and unrealized changes to fair value for non-hedge derivative contracts and adjustments to originally invoiced weights and assays.
3 By-product credits subtotal is used in the calculated of cash cost per pound of copper and zinc produced, net of by-product credits. Cash cost per pound of copper and zinc produced, net of by-product credits, are non-IFRS financial performance measures with no standardized definition under IFRS. For further information and a detailed reconciliation, please see the discussion under the "Non-IFRS Financial Reporting Measures" section of this MD&A.
4 Derivative mark-to-market excludes mark-to-market on QP hedges.
5 Copper, zinc and molybdenum shown in metric tonnes and gold and silver shown in ounces.
6 Realized price for copper, zinc and molybdenum in $/metric tonne and realized price for gold and silver in $/oz.
7 Realized price for copper, zinc and molybdenum in $/lb.

36

Three months ended December 31, 2019
(in $ millions) 1	Copper	Zinc	Gold	Silver	Molybdenum	Other	Total
Revenue per financial statements	201.7	72.1	37.2	8.5	4.7	1.3	325.5
Amortization of deferred revenue	-	-	7.9	16.0	-	-	23.9
Pricing and volume adjustments2	(1.7)	(0.4)	0.1	0.2	(1.9)	-	(3.7)
By-product credits 3	200.0	71.7	45.2	24.7	2.8	1.3	345.7
Derivative mark-to-market 4	-	0.3	-	-	-	-	0.3
Revenue, excluding mark-to-market on non-QP hedges	200.0	72.0	45.2	24.7	2.8	1.3	346.0
Payable metal in concentrate sold 5	33,715	28,001	30,344	909,423	199	-	-
Realized price 6	5,930	2,573	1,490	27.19	-	-	-
Realized price 7	2.69	1.17	-	-	-	-	-
Year ended December 31, 2019
(in $ millions) 1	Copper	Zinc	Gold	Silver	Molybdenum	Other	Total
Revenue per financial statements	786.3	284.9	120.4	29.3	31.3	4.8	1,257.0
Amortization of deferred revenue	-	-	32.0	60.4	-	-	92.4
Pricing and volume adjustments2	(12.9)	(0.1)	4.5	(1.2)	(2.4)	-	(12.1)
By-product credits 3	773.4	284.8	156.9	88.5	28.9	4.8	1,337.3
Derivative mark-to-market4	-	-	-	-	-	-	-
Revenue, excluding mark-to-market on non-QP hedges	773.4	284.8	156.9	88.5	28.9	4.8	1,337.3
Payable metal in concentrate sold 5	128,519	104,319	108,999	3,452,926	1,186	-	-
Realized price 6	6,018	2,730	1,439	25.64	-	-	-
Realized price 7	2.73	1.24	-	-	-	-	-
1 Average realized price per unit sold may not calculate based on amounts presented in this table due to rounding.
2 Pricing and volume adjustments represents mark-to-market adjustments on provisionally priced sales, realized and unrealized changes to fair value for non-hedge derivative contracts and adjustments to originally invoiced weights and assays.
3 By-product credits subtotal is used in the calculated of cash cost per pound of copper and zinc produced, net of by-product credits. Cash cost per pound of copper and zinc produced, net of by-product credits, are non-IFRS financial performance measures with no standardized definition under IFRS. For further information and a detailed reconciliation, please see the discussion under the "Non-IFRS Financial Reporting Measures" section of this MD&A.
4 Derivative mark-to-market excludes mark-to-market on QP hedges.
5 Copper, zinc and molybdenum shown in metric tonnes and gold and silver shown in ounces.
6 Realized price for copper, zinc and molybdenum in $/metric tonne and realized price for gold and silver in $/oz.
7 Realized price for copper, zinc and molybdenum in $/lb.

The price, quantity and mix of metals sold, affect our revenue, operating cash flow and profit. Revenue from metals sales can vary from quarter to quarter due to production levels, shipping volumes and transfer of risk and title to customers.

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Stream Sales

The following table shows stream sales included within realized prices and their respective deferred revenue and cash payment rates:

		Three months ended		Year ended
		Dec. 31, 2020		Dec. 31, 2020
		Manitoba	Peru	Manitoba	Peru
Gold	oz	5,435	1,848	18,503	6,299
Silver	oz	92,834	442,199	355,318	1,460,886
Gold deferred revenue drawdown rate1,2	$/oz	1,217	976	1,173	976
Gold cash rate3	$/oz	424	408	422	406
Total gold stream realized price	$/oz	1,641	1,384	1,595	1,382
Silver deferred revenue drawdown rate1,2	$/oz	23.47	21.52	22.43	21.52
Silver cash rate3	$/oz	6.26	6.02	6.23	5.99
Total silver stream realized price	$/oz	29.73	27.54	28.66	27.51
		Three months ended		Year ended
		Dec. 31, 2019		Dec. 31, 2019
		Manitoba	Peru	Manitoba	Peru
Gold	oz	4,160	3,103	17,740	11,750
Silver	oz	61,487	671,742	355,468	2,405,554
Gold deferred revenue drawdown rate1,2	$/oz	1,183	948	1,177	948
Gold cash rate 3	$/oz	420	404	418	402
Total gold stream realized price	$/oz	1,603	1,352	1,595	1,350
Silver deferred revenue drawdown rate1,2	$/oz	22.63	21.77	22.51	21.77
Silver cash rate 3	$/oz	6.20	5.96	6.17	5.93
Total silver stream realized price	$/oz	28.83	27.73	28.68	27.70
1Subsequent to the variable consideration adjustment recorded on August 1, 2020, the deferred revenue amortization is recorded in Manitoba at C$1,589/oz gold and C$30.63/oz silver (December 31, 2019 - C$1,562/oz gold and C$29.89/oz silver) and converted to US dollars at the exchange rate in effect at the time of revenue recognition.
2 Deferred revenue drawdown rates for gold and silver do not include variable consideration adjustments.
3 The gold and silver cash rate for Manitoba increased by 1% from $400/oz and $5.90/oz effective August 1, 2015. Subsequently every year, on August 1, the cash rate will increase by 1% compounded. The weighted average cash rate is disclosed. The gold and silver cash rate for Peru increased by 1% from $400/oz and $5.90/oz effective July 1, 2019. Subsequently every year, on July 1, the cash rate will increase by 1% compounded. The weighted average cash rate is disclosed.

38

Cost of Sales

Our detailed cost of sales is summarized as follows:

(in thousands)	Three months ended		Year ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Peru
Mining	24,967	18,533	70,724	82,417
Milling	39,219	43,860	134,096	159,913
Changes in product inventory	(6,550)	7,410	(3,883)	(3,313)
Depreciation and amortization	50,861	56,938	184,275	209,126
G&A	14,540	15,174	43,393	56,922
Overhead costs related to suspension of activities (cash)	-	-	15,810	-
Inventory adjustments	(2,188)	(100)	32	504
Freight, royalties and other charges	11,388	17,273	39,915	59,740
Total Peru cost of sales	132,237	159,088	484,362	565,309
Manitoba
Mining	46,598	46,335	178,308	186,972
Milling	11,147	13,396	46,057	49,269
Zinc plant	18,736	19,464	71,799	72,259
Changes in product inventory	2,029	3,267	2,054	(4,413)
Depreciation and amortization	47,722	37,007	177,552	135,429
G&A	12,874	11,500	50,312	47,119
Overhead costs related to suspension of activities (cash)	8,232	-	8,232	-
Freight, royalties and other charges	8,348	8,795	34,742	33,953
Total Manitoba cost of sales	155,686	139,764	569,056	520,588
Cost of sales	287,923	298,852	1,053,418	1,085,897

Total cost of sales for the fourth quarter of 2020 was $287.9 million, reflecting a decrease of $11.0 million from the fourth quarter of 2019. Cost of sales related to Peru decreased in the fourth quarter of 2020, compared to the same period of 2019, by $26.9 million. The decrease is primarily the result of changes in product inventory due to an inventory buildup in the fourth quarter of 2020 and lower mining and milling costs which is a function of lower production volumes as well as reduced freight and other charges compared to the same period in 2019. In Manitoba, cost of sales increased by $15.9 million, compared to the fourth quarter of 2019, primarily as a result of the production interruption at 777 mine during the fourth quarter of 2020 which resulted in a $11.7 million fixed overhead charge (cash: $8.2 million; non-cash: $3.5 million included in depreciation) that would have been capitalized to inventories. The depreciation also increased during the fourth quarter of 2020 compared to the same period in 2019 as a result of increases to our decommissioning and restoration obligation assets that were recorded in the fourth quarter of 2019 and are being depreciated through to the end of the mine life in 2022.

For the full year, cost of sales was $1,053.4 million, which was $32.5 million less than in 2019. The decrease is principally related to lower production costs from an eight-week suspension of Constancia operations in the second quarter of 2020 partially offset by an accounting charge for $31.9 million of fixed overhead costs (cash: $15.8 million; non-cash: $16.1 million included in depreciation) that would ordinarily have been capitalized to inventories and property, plant, and equipment. In Manitoba, cost of sales increased by $48.5 million compared to 2019 for the same reasons described above.

39

For details on unit operating costs refer to the respective tables in the "Operations Review" section of this MD&A.

For the fourth quarter of 2020, other significant variances in expenses from operations, compared to the same period in 2019, include the following:

-Selling and administrative expense increased by $9.0 million compared to the same period in 2019. This increase was mainly due to higher stock-based compensation charges as a result of the relative impact of the revaluation of previously issued share units to higher share prices.

-Exploration and evaluation expenses decreased by $3.3 million compared to the fourth quarter of 2019, in line with the reduced 2020 exploration budget compared to 2019.

For full year 2020, other significant variances in expenses from operations, compared to 2019, include the following:

-Selling and administrative expense increased by $5.2 million compared to the same period in 2019. This increase was mainly due to higher stock-based compensation charges as a result of the relative impact of the revaluation of previously issued share units to higher share prices. This was partially offset by a general reduction in consulting, legal and travel costs.

-Exploration and evaluation expenses decreased by $13.6 million in line with the reduced 2020 exploration budget compared to 2019.

-Other expenses decreased by $33.5 million due to the write down of a joint venture receivable (the "UCM Receivable") from prior year of $26.0 million as well as the recognition of a delivery obligation related to the Pampacancha deposit from prior year of $7.5 million, neither of which reoccurred in the current year.

-Impairment losses decreased by $322.2 million as a result of an impairment charge recorded in the third quarter of 2019 in our investment in the Rosemont project.

40

Net finance expense

(in $ thousands)	Three months ended		Year ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Finance costs - accrued or payable:
Interest expense on long-term debt	21,610	19,591	82,712	78,265
Withholding taxes	2,095	1,849	8,267	8,100
Tender premium on 7.25% senior unsecured notes	-	-	7,252	-
Other accrued/payable costs (income)1	2,225	2,131	7,014	2,500
Total finance costs - accrued or payable	25,930	23,571	105,245	88,865
Finance costs - non-cash:
Accretion on streaming agreements2	13,854	15,945	56,670	69,772
Interest capitalized	-	-	-	(9,890)
Change in fair value of financial assets and liabilities at fair value through profit or loss	(37,520)	8,035	(29,370)	8,247
Write off unamortized transaction costs	-	-	3,817	-
Other non-cash costs3	4,004	1,059	5,540	7,002
Total finance costs - non-cash	(19,662)	25,039	36,657	75,131
Net finance expense	6,268	48,610	141,902	163,996
1 Includes interest income and other finance expense.
2 Includes variable consideration adjustment (prior periods).
3 Includes accretion on community agreements, unwinding of discount on provisions, and net foreign exchange losses (gains).

Compared to the three months ended December 31, 2019, net finance expense decreased by $42.3 million mainly due to a $44.7 million decrease in non-cash finance costs. This was principally caused by a $48.4 million relative increase in the fair value of the embedded derivative on the early redemption option associated with our senior unsecured notes due in 2025 in the fourth quarter of 2020 compared to the same period in 2019. This increase was partially offset by a $3.4 million non-cash revaluation of our gold prepayment liability measured through profit or loss.

On a year-to-date basis, net finance expense decreased by $22.1 million compared to the same period in 2019. The decline was mainly caused by a $48.2 relative increase in the fair value of the embedded derivative as described above, a $9.7 million relative change in variable consideration adjustment reducing the accretion expense on our stream arrangements as well as an $8.7 million relative increase in the market value of our investments measured through profit or loss. These increases were partially offset by a $20.1 million non-cash revaluation of our gold prepayment liability, a $9.9 million increase in net interest charges (as, effective October 1, 2019, we no longer capitalize interest costs on the Rosemont project, due to its delay in development), a one-time payment of $7.3 million to satisfy the early redemption premium paid to holders of our Redeemed Notes, a decline of $6.7 million for interest earned on our cash balances as well as a $3.8 million charge for the write-down of unamortized transaction costs related to the Redeemed Notes.

41

Tax Recovery

For the three months and year ended December 31, 2020, tax recovery decreased by $34.4 million and $74.5 million, respectively, compared to the same period in 2019. The following table provides further details:

	Three months ended		Year ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
(in $ thousands)
Deferred tax recovery - income tax 1	(11,711)	(48,476)	(39,904)	(132,479)
Deferred tax recovery  - mining tax 1	(256)	(12,498)	(3,332)	(12,386)
Total deferred tax recovery	(11,967)	(60,974)	(43,236)	(144,865)
Current tax expense - income tax	3,749	19,067	4,109	30,201
Current tax expense - mining tax	1,723	1,010	4,622	5,711
Total current tax expense	5,472	20,077	8,731	35,912
Tax recovery	(6,495)	(40,897)	(34,505)	(108,953)
1 Deferred tax expense (recovery) represents our draw down/increase of non-cash deferred income and mining tax assets/liabilities.

Income Tax Recovery

Applying the estimated Canadian statutory income tax rate of 26.3% to our loss before taxes of $179.1 million for the full year in 2020 would have resulted in a tax recovery of approximately $47.0 million; however, we recorded an income tax recovery of $35.8 million. The significant items causing our effective income tax rate to be different than the 26.3% estimated Canadian statutory income tax rate include:

-Deferred tax recovery of approximately $3.6 million as certain non-monetary assets are recognized at historical cost while the tax bases of the assets change as the exchange rates fluctuates, which creates taxable temporary differences.

-Certain deductible temporary differences mostly with respect to Peru, and mostly relating to the decommissioning and restoration liabilities, were not recognized as we have determined that it is not probable that we will realize the recovery of these deferred tax assets based on the timing of the reversals of the deductible temporary differences and the future projected taxable profit of the Peruvian operations.  This has resulted in deferred tax expense of $8.5 million.

-Certain deductible temporary differences with respect to Manitoba, and mostly relating to the decommissioning and restoration liabilities, were not recognized as we have determined that it is not probable that we will realize the recovery of these deferred tax assets based on the timing of the reversals of the deductible temporary differences and the future projected taxable profit of the Manitoba operations. Adjusted for the average annual effective tax rate methodology, this resulted in deferred tax expense of $1.5 million.

-Certain deductible temporary differences with respect to our foreign operations are recorded using an income tax rate other than the Canadian statutory income tax rate of 26.3%, resulting in a deferred tax expense of $5.5 million.

-Certain foreign exchange gains and other items are not taxable for local income tax purposes and therefore result in a deferred tax recovery of approximately $1.8 million.

-We revised our computation of deferred tax assets related to deductible temporary differences in Canada for changes in statutory tax rates taking into account the relevant provincial allocation factors based on income earned in different Canadian jurisdictions. This resulted in a decrease to the Canadian statutory rate from 27.0% to 26.3% during the fiscal year. The result was a deferred tax expense of approximately $2.4 million.

42

A decrease in the statutory tax rate in 2020 mainly reflects a reduction in the Canadian statutory tax rate which is the result of the changes to the relevant provincial allocation factors based on income earned and expenses incurred in different Canadian jurisdictions.

Applying the estimated Canadian statutory income tax rate of 27.0% to our loss before taxes of $452.8 million for the full year in 2019 would have resulted in a tax recovery of approximately $122.2 million; however, we recorded an income tax recovery of $102.3 million. The significant items causing our effective income tax rate to be different than the 27.0% estimated Canadian statutory income tax rate include:

-Certain previously unrecognized deductible temporary differences with respect to Manitoba, and mostly relating to the decommissioning and restoration liabilities, were recognized in the current year as we have determined that it is probable that we will realize the recovery of these deferred tax assets through the reversals of temporary differences and future projected taxable profit of the Manitoba operations. This results in a decrease in deferred tax expense of approximately $16.3 million;

-Certain deductible temporary differences with respect to our foreign operations are recorded using an income tax rate other than the Canadian statutory income tax rate of 27.0%, resulting in a deferred tax expense of $20.3 million;

-The write down of the UCM Receivable of $26.0 million is not deductible for local income tax purposes and therefore results in an increase in deferred tax expense of approximately $7.0 million; and

-An intercompany dividend payment being subject to withholding tax that is classified as current income tax of $6.8 million.

Mining Tax Recovery

Applying the estimated Manitoba mining tax rate of 10.0% to our loss before taxes of $179.1 million for the full year in 2020 would have resulted in a tax recovery of approximately $17.9 million; however, we recorded a mining tax expense of $1.3 million. Effective mining tax rates can vary significantly based on the composition of our earnings and the expected amount of mining taxable profits. Corporate costs and other costs not related to mining operations are not deductible in computing mining profits. A brief description of how mining taxes are calculated in our various business units is discussed below.

Manitoba

The Province of Manitoba imposes mining tax on profit related to the sale of mineral products mined in the Province of Manitoba (mining taxable profit) at the following rates:

-10% of total mining taxable profit if mining profit is C$50 million or less;

-15% of total mining taxable profit if mining profits are between C$55 million and C$100 million; and

-17% of total mining taxable profit if mining profits exceed C$105 million.

We estimate that the tax rate that will be applicable when temporary differences reverse will be approximately 10.0%.

Peru

The Peruvian government imposes two parallel mining tax regimes, the Special Mining Tax and the Modified Royalty, on companies' operating mining income on a sliding scale, with progressive rates ranging from 2.0% to 8.4% and 1.0% to 12.0%, respectively. Based on financial forecasts, we have recorded a deferred tax liability as at December 31, 2020, at the tax rate we expect to apply when temporary differences reverse.

43

LIQUIDITY AND CAPITAL RESOURCES

Senior Unsecured Notes Refinancing

On September 23, 2020, we completed the offering of $600.0 million aggregate principal amount of 6.125% senior notes due April 2029 (the "New Notes"). The New Notes are governed by an indenture, dated as of September 23, 2020, among the Company, the subsidiaries of the Company party thereto as guarantors and U.S. Bank National Association, as trustee.

The proceeds from this offering were primarily used to redeem all $400.0 million of our outstanding 7.25% senior unsecured notes due 2023 (the "Redeemed Notes"), including the payment of accrued and unpaid interest and a call premium of $7.3 million, and to pay transaction costs associated with the New Notes.

Senior Secured Revolving Credit Facilities

On August 31, 2020, we completed an amendment to our senior secured revolving credit facilities (the "Credit Facilities"). As a result of the amendment, the total available borrowings under the Credit Facilities decreased to $400.0 million from $550.0 million to reflect our anticipated business requirements until June 2022 when the Credit Facilities mature. We also revised various financial covenants as follows:

-Maintaining net debt to EBITDA ratio of less than:

◦5.25:1 from September 30, 2020 to December 31, 2021; and,

◦3.50:1 from January 1, 2022 to maturity.

-Maintaining an interest coverage ratio of greater than:

◦2.50:1 from September 30, 2020 to December 31, 2021; and,

◦3.00:1 from January 1, 2022 to maturity.

-Maintaining a minimum liquidity of greater than $50 million to December 31, 2021.

The EBITDA calculation for the purposes of the covenants may differ from the non-IFRS measure of adjusted EBITDA shown in this MD&A. As at December 31, 2020, our liquidity includes $439.1 million in cash and cash equivalents as well as undrawn availability of $284.9 million under our Credit Facilities. As at December 31, 2020, we are in compliance with our covenants under the Credit Facilities and have drawn $115.1 million in letters of credit under the Credit Facilities.

As at December 31, 2020, the Arizona business unit had $8.6 million in surety bonds and the Peru business unit had $20.0 million in surety bonds issued to support future reclamation and closure obligations. The Peru business unit also had $45.0 million in letters of credit issued with various Peruvian financial institutions. No cash collateral is required to be posted under these letters of credit or surety bonds.

Financial Condition

Financial Condition as at December 31, 2020 compared to December 31, 2019

Cash and cash equivalents increased by $43.0 million during the year to $439.1 million as at December 31, 2020. This increase was mainly the result of cash flow from operating activities of $239.5 million, $115.0 million of proceeds from the gold prepay transaction and approximately $191.8 million in net proceeds raised from our New Notes offering. Offsetting these cash inflows was $361.2 million of capital investments primarily at our Peru and Manitoba operations, interest payments of $81.5 million, leasing and financing payments of $52.2 million, a $7.3 million premium paid to redeem our 2023 Notes and dividends of $3.8 million. We hold the majority of our cash and cash equivalents in low-risk, liquid investments with major Canadian and Peruvian financial institutions.

44

Working capital increased by $35.6 million to $306.9 million from December 31, 2019 to December 31, 2020, primarily due to the cash and cash equivalent increase of $43.0 million and an increase of $35.2 million in trade receivables due to timing of cash receipts, partially offset by an increase in trade and other payables of $40.7 million arising mainly from timing of payments.

Cash Flows

The following table summarizes our cash flows for the three months and year ended December 31, 2020 and December 31, 2019:

(in $ thousands)	Three months ended		Year ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Operating cash flow before changes in non-cash working capital	86,071	69,141	241,863	307,284
Change in non-cash working capital	35,019	29,524	(2,383)	3,572
Cash generated from operating activities	121,090	98,665	239,480	310,856
Cash (used in) generated by investing activities	(117,498)	(86,689)	(359,018)	(292,370)
Cash (used in) generated by financing activities	(13,192)	(14,386)	162,093	(137,778)
Effect of movement in exchange rates on cash and cash equivalents	(279)	118	434	(59)
(Decrease) increase in cash and cash equivalents	(9,879)	(2,292)	42,989	(119,351)

Cash Flow from Operating Activities

Cash generated from operating activities was $121.1 million during the fourth quarter of 2020, an increase of $22.4 million compared with the same period in 2019. Operating cash flow before change in non-cash working capital was $86.1 million during the fourth quarter of 2020, reflecting an increase of $17.0 million compared to the fourth quarter of 2019. The increase in operating cash flow is primarily the result of higher realized copper and gold prices, higher gold sales volume as well as lower cash costs when compared to the fourth quarter of 2019. This was partially offset by lower sales volumes of copper compared to the fourth quarter of 2019.

Cash generated from operating activities for the full year was $239.5 million, representing a decrease of $71.4 million compared to 2019. Operating cash flow before change in non-cash working capital was $241.9 million for the year, compared to $307.3 million during 2019. The decrease in operating cash flow for the full year is due to significantly lower copper sales volumes in Peru as a result of an eight-week suspension of Constancia operations in the second quarter and lower copper grades as well as lower realized zinc prices and silver sales volumes. This was partially offset by higher realized copper and gold prices and higher gold sales volumes.

Cash Flow from Investing and Financing Activities

During the fourth quarter of 2020, we used $130.7 million in investing and financing activities, primarily driven by $117.9 million of capital expenditures, capitalized lease payments of $9.4 million and other financing payments of $3.8 million.

For the full year in 2020, we used $196.9 million of cash in investing and financing activities, composed primarily of $361.2 million of capital investments, interest payments of $81.5 million, capitalized lease payments of $36.0 million and other financing payments of $16.2 million, partially offset by net proceeds of $191.8 million from our New Notes offering, and $115.0 million of proceeds from the gold prepay transaction.

45

Capital Expenditures

The following summarizes accrued and cash additions to capital assets for the periods indicated:

(in $ millions)	Three months ended		Year ended		Guidance
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Annual
					2020 1	2021
Manitoba sustaining capital expenditures	21.7	30.0	95.3	126.3	100.0	90.0
Peru sustaining capital expenditures 2	37.0	31.4	91.1	84.9	80.0	135.0
Total sustaining capital expenditures	58.7	61.4	186.4	211.2	180.0	225.0
Arizona capitalized costs	5.9	7.0	15.6	36.4	20.0	20.0
Peru growth capitalized expenditures 3	11.3	1.2	107.0	2.1	70.0	5.0
Manitoba growth capitalized expenditures	30.4	7.8	61.4	14.1	80.0	75.0
Other capitalized costs 4	5.8	49.3	52.3	91.9
Capitalized exploration	8.6	8.9	11.9	15.7	15.0	15.0
Capitalized interest	-	-	-	9.9
Total other capitalized costs	62.0	74.2	248.2	170.1
Total capital additions	120.7	135.6	434.6	381.3
Reconciliation to cash capital additions:
Decommissioning and restoration obligation	(3.6)	(46.6)	(46.8)	(89.4)
Capitalized interest	-	-	-	(9.9)
Right-of-use asset additions	(0.3)	(2.4)	(17.8)	(22.2)
Change in community agreement accruals	0.6	-	(6.7)	-
Change in capital accruals and other	0.5	2.1	(2.1)	(0.6)
Total cash capital additions	117.9	88.7	361.2	259.2
1 Reflects Manitoba guidance issued February 20, 2020 and updated Peru guidance issued August 11, 2020.
2 Peru sustaining capital expenditures includes capitalized stripping costs.
3 Hudbay's initial growth capital guidance for Peru of $70 million did not include the cost of the individual land user agreements due to the ongoing nature of the negotiations.
4 Other capitalized costs include decommissioning and restoration adjustments.

Sustaining capital expenditures in Manitoba for the three months and year ended December 31, 2020 were $21.7 million and $95.3 million respectively, representing decreases of $8.3 million and $31.0 million, respectively, compared to the same periods in 2019. The decrease is mostly due to a reduction in capital development at the 777 mine as it nears the end of its mine life in 2022. Planned equipment purchases that are designated for 777 will ultimately be transferred to Lalor once 777 closes and capital development spending at 777 is expected to be further reduced into 2021.

46

Sustaining capital expenditures in Peru for the three months and year ended December 31, 2020 were $37.0 million and $91.1 million respectively, representing increases of $5.6 million and $6.2 million, respectively, from the same periods in 2019. The increase in Peru sustaining capital expenditures compared to the same period last year was mainly due to higher mine maintenance and tailings management construction costs, partially offset by decreased capitalized stripping costs.

Peru's 2020 growth capital of $107.0 million includes costs associated with the surface rights acquisition agreement with the local community and the individual agreements related to certain community members who were using the land. For the full year, growth capital spending for Peru has exceeded the initial guidance as a result of the commitments under the individual land-user agreements. As previously disclosed, the Company's initial growth capital guidance for Peru of $70.0 million did not include the cost of the individual land user agreements due to the ongoing nature of the negotiations.

Manitoba's 2020 growth capital of $61.4 million includes spending for the New Britannia refurbishment project which includes construction of the new copper flotation building and construction of a pipeline between the New Britannia and Stall mills. The project is currently approximately 73% complete and is tracking ahead of the original  schedule. Despite tracking ahead of schedule, the project spending in 2020 was lower than expected with the difference expected to be spent in 2021.

Other capitalized costs for the three months and year ended December 31, 2020 were $5.8 million and $52.3 million, respectively, and relate primarily to the remeasurement of previously recognized decommissioning and restoration liabilities at our Peru and Manitoba operations.

47

Capital Commitments

As at December 31, 2020, we had outstanding capital commitments in Canada of approximately $22.5 million of which $19.0 million can be terminated, approximately $39.1 million in Peru primarily related to exploration option agreements, all of which can be terminated, and approximately $179.7 million in Arizona, primarily related to our Rosemont project, of which approximately $89.3 million can be terminated.

Contractual Obligations

The following table summarizes our significant contractual obligations as at December 31, 2020:

		Less than 12 months	13 - 36 months	37 - 60 months	More than 60 months
Payment Schedule (in $ millions)	Total
Long-term debt obligations1	1,726.9	88.0	168.2	742.1	728.6
Gold prepayment obligation3	137.0	-	137.0	-	-
Lease obligations	129.0	93.3	29.5	2.0	4.2
Purchase obligation - capital commitments	241.3	38.7	20.0	28.0	154.6
Purchase obligation - other commitments2	953.3	397.9	327.1	158.4	69.9
Pension and other employee future benefits obligations3	166.5	16.7	30.2	7.6	112.0
Community agreement obligations4	58.8	12.1	9.5	6.6	30.6
Decommissioning and restoration obligations4	268.6	19.6	25.6	7.6	215.8
Total	3,681.4	666.3	747.1	952.3	1,315.7
1 Long-term debt obligations include scheduled interest payments, as well as principal repayments.
2 Primarily made up of long-term agreements with operational suppliers, obligations for power purchase, Pampacancha delivery obligation, concentrate handling, fleet and port services, as well as deferred consideration arising from the acquisition of Rosemont's minority interest.
3 Discounted.
4 Represents the Peru community agreement obligations, excluding interest.
5 Undiscounted before inflation.

In addition to the contractual obligations included in the above payment schedule, we also have the following commitments which impact our financial position:

-A profit-sharing plan with most Manitoba employees;

-A profit-sharing plan with all Peru employees;

-Wheaton precious metals stream agreements for the 777 mine and Constancia mines;

-A net smelter returns royalty agreement related to the 777 mine; and,

-Government royalty payments related to the Constancia mine.

Outstanding Share Data

As of February 17, 2021, there were 261,272,151 common shares of Hudbay issued and outstanding. In addition, there were 1,563,189 stock options outstanding.

48

FINANCIAL RISK MANAGEMENT

Impact of COVID-19

As a result of the COVID-19 global pandemic, we have experienced operational, supply chain, travel, labour and shipping disruptions, as well as delays to our community engagement efforts in Peru, and we may continue to experience similar disruptions in the future. As a result, our financial results may remain volatile as COVID-19 continues to affect production, operating costs and the prices we receive for our products, as well as the development timeline for Pampacancha. The resumption of normal operating activities is highly dependent on the global response and impact of the COVID-19 global pandemic and, at a local level, the expected development timeline for Pampacancha depends upon our ability to effectively engage and negotiate with individual land users as well as the communities that are affected by our Constancia project in Peru. We expect that our current liquidity together with cash flows from operations will be sufficient to meet our liquidity needs in 2021.

Given the uncertainty of the duration and magnitude of the impact of COVID-19, including its impact on the development timeline for Pampacancha, our 2021 production and cost guidance are subject to a higher than normal degree of uncertainty.

Political and Social Risks

Peru has recently undergone a period of heightened political instability. A general election is scheduled to be held in April 2021 in which a record number of candidates are presently running for President. A change in government, government policy, the declaration of a state of emergency or the implementation of new, or the modification of existing, laws and regulations affecting our operations and other mineral properties could have a material adverse impact on us and our projects. The risk exists that further government limitations, restrictions or requirements, not presently foreseen, will be implemented. In addition, changes in policy that alter laws regulating the mining industry could have a material adverse effect on us. We are at a heightened risk of having this occur whenever there is a change in government in the countries or regions in which we operate and, in the current environment, due to the COVID-19 pandemic.

Political or social unrest in Peru or instability could adversely affect our ability to operate the Constancia mine and develop the Pampacancha deposit. Such adverse effects could result from positions or actions that may be taken by the national government or at the regional, community or local levels by government or non-government actors, including demanding payments, encroaching on our land, challenging the boundaries of such land or our rights to possess and operate on such land, protesting against our operation, impeding project activities through roadblocks or other public manifestations and attacking project assets or personnel. The risk of disruptions from such opposition tends to increase with national, regional and local elections in Peru as well as with change to the general political and social climate in the area in which we operate. While we continue to seek to constructively engage with all our stakeholders in the Constancia region, we've experienced an increase in disruptive activity in the Province of Chumbivilcas in recent weeks.

We continue to actively monitor the political and social risks in Peru during this elevated period of instability.

Reclamation and Mine Closure Costs

The ultimate timing of, and costs for, future removal and site restoration could differ from current estimates. Our estimates for this future liability are subject to change based on updated closure plans, amendments to applicable laws and legislation, the nature of ongoing operations and technological innovations. In addition, regulatory authorities in various jurisdictions require us to post financial assurances to secure, in whole or in part, future reclamation and restoration obligations in such jurisdictions based on the approved closure plans. Changes to the amounts required, as well as the nature of the collateral to be provided, including as a result of updated closure plans, could significantly increase our costs, making the maintenance and development of existing and new mines less economically feasible, and any capital resources we utilize for this purpose will reduce the resources available for our other operations and commitments. Although we accrue for future closure costs based on current disturbance, we do not necessarily reserve cash in respect of these obligations or otherwise fund these obligations in advance. As a result, we will have significant cash expenditures when we are required to close and restore mine sites, including our 777 mine and Flin Flon operations. Our estimate of this future liability may increase as a result of a new closure plan for the 777 mine and Flin Flon operations. We expect our new Flin Flon closure plan to be submitted to the Manitoba and Saskatchewan governments for approval later in 2021.

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Carrying Values and Mine Plan Updates

At the end of each reporting period, Hudbay reviews its groups of non-financial assets to determine whether there are any indicators of impairment or impairment reversal. If any such indicator exists, the Company estimates the recoverable amount of the non-financial asset group in order to determine the extent of the impairment loss or reversal, if any. At December 31, 2020, the Company assessed whether there were impairment or impairment reversal indicators associated with the general business environment and known changes to business planning (including any arising from the potential impacts of COVID-19 on our business) and determined there were none.

There are a number of potential indicators that could trigger non-financial asset impairment or reversal of impairment in the future. One such potential indicator is a change to the life of mine ("LOM") plan for an asset. LOM plans incorporate management's best estimates of key assumptions which include future commodity prices, the value of mineral resources not included in the LOM plan, production based on current estimates of recoverable reserves, discount rates, future operating and capital costs and future foreign exchange rates.

There is a risk that certain assumptions in the updated LOM plans for the Snow Lake operations and Constancia that are planned to be completed by the end of March 2021 could give rise to an indicator of impairment or impairment reversal and cause an adjustment to the carrying value of the relevant assets and/or impact our financial statements.

Metals Price Strategic Risk Management

From time to time, we maintain price protection programs and conduct commodity price risk management to reduce risk through the use of financial instruments.

Commodity prices are a key driver of our financial and operational results. Our strategic objective is to provide our investors with exposure to base metals prices, unless a reason exists to implement a hedging arrangement.

In the normal course, we typically consider base metal price hedging:

-In conjunction with a major capital commitment to a growth opportunity for which operating cash flow is a key funding source;

-To ensure the viability of a shorter life and/or higher cost mine;

-To manage the risk associated with provisional pricing terms in concentrate purchase and sale agreements; or,

-To offset fixed price zinc sales contracts with customers.

During 2020, we entered into copper hedging transactions intended to manage the risk associated with provisional pricing terms in concentrate sales agreements.

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As at December 31, 2020, we had 43.4 million pounds of net copper fixed for floating swaps outstanding at an average fixed receivable price of $3.22/lb associated with provisional pricing risk in concentrate sales agreements. These swaps settle across January to April 2021.

During the second quarter of 2020, we entered into a gold forward sale and prepay transaction which generated $115.0 million in cash proceeds to pre-fund the full capital budget of the New Britannia gold mill refurbishment. The transaction valued the future gold ounce delivery obligation for 79,954 gold ounces in 2022 and 2023 at forward curve prices averaging approximately $1,682 per ounce. The gold delivery obligation is to be satisfied with a monthly delivery of 3,331 gold ounces over a 24-month period from January 2022 to December 2023.

To provide a service to customers who purchase zinc from our plants and require known future prices, we enter into fixed price sales contracts. To ensure that we continue to receive a floating or unhedged realized zinc price, we enter into forward zinc purchase contracts that effectively offset the fixed price sales contracts with our customers.

From time to time, we enter into gold and silver forward sales contracts to hedge the commodity price risk associated with the future settlement of provisionally priced deliveries. We are generally obligated to deliver gold and silver to Wheaton prior to the determination of final settlement prices. These forward sales contracts are entered into at the time we deliver gold and silver to Wheaton, and are intended to mitigate the risk of subsequent adverse gold and silver price changes. Gains and losses resulting from the settlement of these derivatives are recorded directly to revenue, as the forward sales contracts do not achieve hedge accounting, and the associated cash flows are classified in operating activities. Our swap agreements are with counterparties we believe to be creditworthy and do not require us to provide collateral.

Interest Rate and Foreign Exchange Risk Management

To the extent that we incur indebtedness at variable interest rates to fund our growth objectives, we may enter into interest rate hedging arrangements to manage our exposure to short-term interest rates. To the extent that we make commitments to capital expenditures denominated in foreign currencies, we may enter into foreign exchange forwards or acquire foreign currency outright, which may result in foreign exchange gains or losses in our consolidated income statements.

At December 31, 2020, approximately $408.3 million of our cash and cash equivalents was held in US dollars, approximately $26.7 million of our cash and cash equivalents was held in Canadian dollars, and approximately $4.1 million of our cash and cash equivalents was held in Peruvian soles.

51

TREND ANALYSIS AND QUARTERLY REVIEW

A detailed quarterly and annual summary of financial and operating performance can be found in the "Summary of Results" section at the end of this MD&A. The following table sets forth selected consolidated financial information for each of our eight most recently completed quarters:

	2020				2019
(in $ millions)	Q4	Q3	Q2	Q1	Q4	Q3	Q2	Q1
Revenue	322.3	316.1	208.9	245.1	324.5	291.3	329.4	292.3
Gross profit	34.4	39.3	(12.7)	(22.0)	25.6	31.0	43.1	51.8
Profit (loss) profit before tax	0.9	(23.9)	(74.6)	(81.5)	(42.4)	(348.4)	(43.9)	(18.1)
Profit (loss)	7.4	(24.0)	(51.9)	(76.1)	(1.5)	(274.8)	(54.1)	(13.4)
Adjusted net (loss) earnings1	(16.4)	(25.4)	(39.7)	(39.4)	(24.6)	(23.2)	(8.1)	7.3
Earnings (loss) per share:
Basic and diluted	0.03	(0.09)	(0.20)	(0.29)	(0.01)	(1.05)	(0.21)	(0.05)
Adjusted net (loss) earnings1 per share	(0.06)	(0.10)	(0.15)	(0.15)	(0.09)	(0.09)	(0.03)	0.03
Operating cash flow2	86.1	84.4	29.5	42.0	69.1	71.2	81.3	85.7
Adjusted EBITDA1	106.9	96.1	49.1	55.0	82.2	76.2	95.9	104.2
1 Adjusted net (loss) earnings, adjusted net (loss) earnings per share, and adjusted EBITDA are non-IFRS financial performance measure with no standardized definition under IFRS. For further information and a detailed reconciliation, please see the discussion under the "Non-IFRS Financial Reporting Measures" section of this MD&A.
2 Operating cash flow before changes in non-cash working capital.

The year 2020 closed off with momentum for increasing commodity prices. An eight-week suspension of Constancia operations in Peru due to a government declared state of emergency during the first half of 2020 and a six-week production interruption at the 777 mine during the fourth quarter of 2020 impacted our production and sales volumes for the full year; however, the shift in sales from Constancia allowed us to benefit from the increasing commodity prices throughout the second half of 2020. The reduced copper production from Constancia and 777 was partially offset by increased production from Lalor.

Earnings in the fourth quarter benefited from $28.0 million in mark-to-market adjustments on certain financial instruments and were negatively impacted by the 777 production interruption which resulted in $11.7 million in certain overhead costs being expensed. Earnings in the third quarter of 2020 were negatively impacted by a $7.3 million premium paid to redeem the 2023 senior notes as well as a $3.8 million write-down of unamortized transaction costs. This was partially offset by an after-tax non-cash adjustment of $9.0 million on our streaming revenues.

Earnings in the second quarter of 2020 were impacted by the temporary suspension of operations at Constancia, which resulted in $25.6 million in certain overhead costs being expensed. The results in the first quarter of 2020 were less impacted by the Constancia shutdown and reflected $6.3 million of shutdown-related overhead costs as well as an inventory write-down of $10.4 million triggered by lower copper prices.

Earnings in 2019 were impacted by an after-tax impairment charge of $242.1 million in the third quarter of 2019, as well as the UCM Receivable write down of $26.0 million in the second quarter of 2019. In the first quarter of 2019, pre-tax revenue and finance expenses were negatively impacted by a $22.3 million charge due to a deferred revenue adjustment arising from higher net mineral reserves and resources.

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The following table sets forth selected consolidated financial information for each of the three most recently completed years:

(in $ millions, except for earnings (loss) per share and dividends declared per share)	2020	2019	2018
Revenue	1,092.4	1,237.4	1,472.4
Gross profit	39.0	151.5	373.7
(Loss) profit before tax	(179.1)	(452.8)	170.8
(Loss) profit	(144.6)	(343.8)	85.4
Adjusted (loss) earnings 1	(121.0)	(48.6)	104.1
(Loss) earnings per share:
Basic and diluted	(0.55)	(1.32)	0.33
Adjusted (loss) earnings1 per share	(0.46)	(0.18)	0.40
Total assets	4,666.6	4,461.1	4,685.6
Operating cash flow2	241.9	307.3	501.4
Adjusted EBITDA1	306.7	358.5	554.8
Total non-current financial liabilities3	1,360.1	1,074.2	1,053.6
Dividends declared per share - C$4	0.02	0.02	0.02
1 Adjusted net (loss) earnings, adjusted net (loss) earnings per share, and adjusted EBITDA are non-IFRS financial performance measure with no standardized definition under IFRS. For further information and a detailed reconciliation, please see the discussion under the "Non-IFRS Financial Reporting Measures" section of this MD&A.
2 Operating cash flow before change in non-cash working capital.
3 Total long-term financial liabilities include non-current portions of net long-term debt, other financial liabilities and finance lease obligations.
4 Dividend paid during March and September of each year.

Although realized prices for copper and gold rose by 5% and 24%, respectively compared to 2019, current year revenues declined by 12% due to lower sales volumes for copper. Sales volumes of copper declined by 31% in 2020 as compared to 2019 as a result of the temporary suspension of Constancia operations. Gross profit declined by 74% in 2020 as compared to 2019 as we expensed certain fixed overhead production costs of $31.9 million during the temporary suspension of operations at Constancia and $11.7 million during the production interruption at 777. Adjusted net loss in 2020 increased by $72.4 million compared to 2019 as a result of the same factors described above.

In 2019, realized prices for copper and zinc decreased by 7% and 11% respectively, compared to prices in 2018. Realized prices for gold increased by 6% compared to prices in 2018. Mill throughput at Constancia reached annual record levels, contributing to higher milling costs, however milled grades dropped in accordance with the mine plan and these factors drove the overall reduction in operating cash flow before changes in non-cash working capital. Revenues decreased by 16% due to lower metals prices and sales volumes for copper and zinc. Profit before tax decreased $623.6 million mainly due to a $322.2 million impairment charge recorded in the third quarter of 2019 relating to the Arizona business unit, as well as a write down of the UCM Receivable for $26.0 million in the second quarter of 2019.

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In addition to the items noted above which impacted gross profit, net profit (loss) was impacted by the following items:

Year	Significant non-recurring items affecting net income	After tax net income impact (in $ millions)
2018	Non-cash deferred tax adjustments	(21.7)
2019	Non-cash deferred tax adjustments	16.3
2019	Write-down on UCM receivable	(26.0)
2019	Rosemont impairment	(242.1)
2020	Non-cash deferred tax adjustments	(6.4)
2020	Peru overhead direct charge	(20.8)
2020	Manitoba overhead direct charge	(7.8)

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NON-IFRS FINANCIAL PERFORMANCE MEASURES

Adjusted net earnings (loss), adjusted net earnings (loss) per share, adjusted EBITDA, net debt, cash cost, sustaining and all-in sustaining cash cost per pound of copper produced, cash cost and sustaining cash cost per pound of zinc produced and combined unit cost and zinc plant unit cost are non-IFRS performance measures. These measures do not have a meaning prescribed by IFRS and are therefore unlikely to be comparable to similar measures presented by other issuers. These measures should not be considered in isolation or as a substitute for measures prepared in accordance with IFRS and are not necessarily indicative of operating profit or cash flow from operations as determined under IFRS. Other companies may calculate these measures differently.

Management believes adjusted net earnings (loss) and adjusted net earnings (loss) per share better reflect the Company's performance for the current period and are better indications of its expected performance in future periods. These measures are used internally by the Company to evaluate the performance of its underlying operations and to assist with its planning and forecasting of future operating results. As such, the Company believes these measures are useful to investors in assessing the Company's underlying performance. We provide adjusted EBITDA to help users analyze our results and to provide additional information about our ongoing cash generating potential in order to assess our capacity to service and repay debt, carry out investments and cover working capital needs. Net debt is shown because it is a performance measure used by the Company to assess our financial position. Cash cost, sustaining and all-in sustaining cash cost per pound of copper produced are shown because we believe they help investors and management assess the performance of our operations, including the margin generated by the operations and the Company. Cash cost and sustaining cash cost per pound of zinc produced are shown because we believe they help investors and management assess the performance of our Manitoba operations. Combined unit cost and zinc plant unit cost is shown because we believe they help investors and management assess our cost structure and margins that are not impacted by variability in by-product commodity prices.

In the first half of 2020, a government-imposed shutdown of non-essential businesses led to a temporary suspension of our Constancia mining operations. Similarly, in the fourth quarter, a shaft incident led to a production interruption at 777 in Manitoba. Fixed overhead production costs incurred during these temporary production disruptions were directly charged to cost of sales. These costs did not contribute to production of inventory and were therefore excluded from the calculations of adjusted net earnings (loss), adjusted EBITDA and cash costs.

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Adjusted Net Earnings (Loss)

Adjusted net earnings (loss) represents net earnings (loss) excluding certain impacts, net of taxes, such as mark-to-market adjustments, impairment charges and reversal of impairment charges, write-down of assets, and foreign exchange (gain) loss. These measures are not necessarily indicative of net earnings (loss) or cash flows as determined under IFRS.

The following table provides a reconciliation of earnings (loss) per the consolidated income statements, to adjusted net earnings (loss) for the three months and year ended December 31, 2020 and 2019.

	Three months ended		Year ended
(in $ millions)	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Profit (loss) for the period	7.4	(1.5)	(144.6)	(343.8)
Tax recovery	(6.5)	(40.9)	(34.5)	(109.0)
Profit (loss) before tax	0.9	(42.4)	(179.1)	(452.8)
Adjusting items:
Mark-to-market adjustments1	(28.0)	10.2	(14.4)	11.0
Rosemont impairment	-	-	-	322.2
Peru inventory write-down (reversal)	(2.2)	-	-	-
Peru cost of sales direct charge from temporary shutdown	-	-	31.9	-
Manitoba cost of sales direct charge from temporary shutdown	11.7	-	11.7	-
Write down of UCM receivable	-	-	-	26.0
Costs associated with proxy contest	-	-	-	3.0
Variable consideration adjustment - stream revenue	-	-	(10.4)	22.3
Pampacancha delivery obligation	-	-	-	7.5
Foreign exchange loss (gain)	2.6	(0.3)	(1.6)	1.4
Write-down of unamortized transaction costs	-	-	3.8	-
Premium paid on redemption of notes	-	-	7.3	-
Adjusted loss before income taxes	(15.0)	(32.5)	(150.8)	(59.4)
Tax expense (recovery)	6.5	40.9	34.5	109.0
Tax impact of adjusting items	3.6	(2.6)	(11.1)	(88.8)
Dividend withholding tax	-	-	-	6.9
Non-cash deferred tax adjustments	(11.5)	(30.4)	6.4	(16.3)
Adjusted net loss	(16.4)	(24.6)	(121.0)	(48.6)
Adjusted net loss ($/share)	(0.06)	(0.09)	(0.46)	(0.18)
Basic weighted average number of common shares outstanding (millions)	261.3	261.3	261.3	261.3
1 Includes changes in fair value  of the embedded derivative on 2025 senior unsecured notes, gold prepayment liability, Canadian junior mining investments, other financial assets and liabilities at fair value through profit or loss and share-based compensation expenses.

After adjusting reported net loss for those items not considered representative of the Company's core business or indicative of future operations, the Company had an adjusted net loss in the fourth quarter 2020 of $16.4 million or $0.06 loss per share.

Adjusted EBITDA

Adjusted EBITDA is profit or loss before net finance expense/income, tax expense/recoveries, depreciation and amortization of property, plant and equipment and deferred revenue, as well as certain other adjustments. We calculate adjusted EBITDA by excluding certain adjustments included within our adjusted net earnings measure which we believe reflects the underlying performance of our core operating activities. The measure also removes the impact of non-cash items and financing costs that are not associated with measuring the underlying performance of our operations. However, our adjusted EBITDA is not the measure defined as EBITDA under our senior notes or revolving credit facilities and may not be comparable with performance measures with the same name reported by other companies. Adjusted EBITDA should not be considered as a substitute for profit or loss or as a better measure of liquidity than operating cash flow, which are calculated in accordance with IFRS. We provide adjusted EBITDA to help users analyze our results and to provide additional information about our ongoing cash generating potential in order to assess our capacity to service and repay debt, carry out investments and cover working capital needs.

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The following table presents the reconciliation of earnings (loss) per the consolidated income statements, to adjusted EBITDA for the three months and year ended December 31, 2020 and 2019: 

	Three months ended		Year ended
(in $ millions)	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Profit (loss) for the period	7.4	(1.5)	(144.6)	(343.8)
Add back: tax recovery	(6.5)	(40.9)	(34.5)	(109.0)
Add back: Net finance expense	6.3	48.6	141.9	164.0
Add back: Other expenses	6.0	3.9	17.6	51.1
Add back: Depreciation and amortization1	98.6	93.9	361.8	344.5
Less: Amortization of deferred revenue and variable consideration adjustment	(20.1)	(23.9)	(74.0)	(76.1)
	91.7	80.1	268.2	30.7
Adjusting items (pre-tax):
Peru inventory write-down (reversal)	(2.2)	-	-	-
Cash portion of Peru cost of sales direct charge from temporary shutdown	-	-	15.8	-
Cash portion of Manitoba cost of sales direct charge from temporary shutdown	8.2	-	8.2	-
Costs associated with proxy contest	-	-	-	3.0
Share-based compensation expenses (recoveries)2	9.2	2.1	14.5	2.6
Rosemont impairment	-	-	-	322.2
Adjusted EBITDA	106.9	82.2	306.7	358.5
1 Includes the non-cash portion of the Peru cost of sales direct charge from the temporary shutdown of $16.1 million and the non-cash portion of the Manitoba cost of sales direct charge from the temporary shutdown of $3.5 million for the year ended December 31, 2020.
2 Share-based compensation expenses (recoveries) reflected in cost of sales and selling and administrative expenses.

Net Debt

The following table presents our calculation of net debt as at December 31, 2020 and December 31, 2019:

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(in $ thousands)	Dec. 31, 2020	Dec. 31, 2019
Total long-term debt as per IFRS financial statements	1,135,675	985,255
Cash and cash equivalents as per IFRS financial statements	(439,135)	(396,146)
Net debt	696,540	589,109

Cash Cost, Sustaining and All-in Sustaining Cash Cost (Copper Basis)

Cash cost per pound of copper produced ("cash cost") is a non-IFRS measure that management uses as a key performance indicator to assess the performance of our operations. Our calculation designates copper as our primary metal of production as it has been the largest component of revenues. The calculation is presented in four manners:

-Cash cost, before by-product credits - This measure is gross of by-product revenues and is a function of the efforts and costs incurred to mine and process all ore mined. However, the measure divides this aggregate cost over only pounds of copper produced, our primary metal of production. This measure is generally less volatile from period to period, as it is not affected by changes in the price received for by-product metals. It is, however, significantly affected by the relative mix of copper concentrate and finished zinc production, where the sale of the zinc will occur later, and an increase in production of zinc metal will tend to result in an increase in cash cost under this measure.

-Cash cost, net of by-product credits - In order to calculate the net cost to produce and sell copper, the net of by-product credits measure subtracts the revenues realized from the sale of the metals other than copper. The by-product revenues from zinc, gold, and silver are significant and are integral to the economics of our operations. The economics that support our decision to produce and sell copper would be different if we did not receive revenues from the other significant metals being extracted and processed. This measure provides management and investors with an indication of the minimum copper price consistent with positive operating margins, assuming realized by-product metal prices are consistent with those prevailing during the reporting period. It also serves as an important operating statistic that management and investors utilize to measure our operating performance versus that of our competitors. However, it is important to understand that if by-product metal prices decline alongside copper prices, the cash cost net of by-product credits would increase, requiring a higher copper price than that reported to maintain positive cash flows and operating margins.

-Sustaining cash cost, net of by-product credits - This measure is an extension of cash cost that includes cash sustaining capital expenditures, including payments on capitalized leases, capitalized sustaining exploration, net smelter returns royalties, payments on certain long-term community agreements, as well as accretion and amortization for expected decommissioning activities for producing assets. It does not include corporate selling and administrative expenses. It provides a more fulsome measurement of the cost of sustaining production than cash cost, which is focused on operating costs only.

-All-in sustaining cash cost, net of by-product credits - This measure is an extension of sustaining cash cost that includes corporate G&A, regional costs, accretion and amortization for community agreements relating to current operations, and accretion for expected decommissioning activities for non-producing assets. Due to the inclusion of corporate selling and administrative expenses, all-in sustaining cash cost is presented on a consolidated basis only.

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Effective September 30, 2020 and for all comparably disclosed periods, we have included the period's deferred revenue amortization as a by-product credit to reflect the net cost of producing and selling the period's precious metals under our streaming arrangements as we believe doing so allows management and our investors to better evaluate the operating performance of the underlying operations. The variable consideration adjustment required under IFRS 15 related to prior periods is not included as a by-product credit in the current period and hence is disclosed as an adjustment in the non-IFRS cash cost measure reconciliation.

The tables below present a detailed build-up of cash cost and sustaining cash cost, net of by-product credits, by business unit in addition to consolidated all-in sustaining cash cost, net of by-product credits, and reconciliations between cash cost, net of by-product credits, to the most comparable IFRS measures of cost of sales for the three months and year ended December 31, 2020 and 2019. Cash cost, net of by-product credits may not calculate exactly based on amounts presented in the tables below due to rounding.

Consolidated	Three months ended		Year ended
Net pounds of copper produced
(in thousands)	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Peru	47,519	58,773	161,269	250,940
Manitoba	12,619	12,705	48,905	51,487
Net pounds of copper produced	60,138	71,478	210,174	302,427

Consolidated	Three months ended				Year ended
	Dec. 31, 2020		Dec. 31, 2019		Dec. 31, 2020		Dec. 31, 2019
Cash cost per pound of copper produced	$000s	$/lb	$000s	$/lb	$000s	$/lb	$000s	$/lb
Cash cost, before by-product credits	196,533	3.27	209,597	2.94	709,757	3.38	816,115	2.70
By-product credits	(170,646)	(2.84)	(145,726)	(2.04)	(582,882)	(2.77)	(563,784)	(1.86)
Cash cost, net of by-product credits	25,887	0.43	63,871	0.90	126,875	0.60	252,331	0.83

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Consolidated	Three months ended				Year ended
	Dec. 31, 2020		Dec. 31, 2019		Dec. 31, 2020		Dec. 31, 2019
Supplementary cash cost information	$000s	$/lb 1	$000s	$/lb 1	$000s	$/lb 1	$000s	$/lb 1
By-product credits2:
Zinc	77,593	1.29	71,732	1.00	265,105	1.26	284,766	0.94
Gold 3	61,010	1.01	45,214	0.63	219,245	1.04	156,899	0.52
Silver 3	20,624	0.34	24,723	0.35	67,342	0.32	88,525	0.29
Molybdenum & other	11,419	0.19	4,057	0.06	31,190	0.15	33,594	0.11
Total by-product credits	170,646	2.84	145,726	2.04	582,882	2.77	563,784	1.86
Reconciliation to IFRS:
Cash cost, net of by-product credits	25,887		63,871		126,875		252,331
By-product credits	170,646		145,726		582,882		563,784
Treatment and refining charges	(14,723)		(21,176)		(56,888)		(83,481)
Share-based compensation expense	919		208		1,400		400
Inventory adjustments	82		1,668		2,302		2,272
Change in product inventory	(4,521)		10,677		(1,829)		(7,726)
Royalties	2,818		3,933		12,807		13,762
Overhead costs related to suspension of activities (cash) - Peru	-		-		15,810		-
Overhead costs related to suspension of activities (cash) - Manitoba	8,232		-		8,232		-
Depreciation and amortization4	98,583		93,945		361,827		344,555
Cost of sales5	287,923		298,852		1,053,418		1,085,897
1 Per pound of copper produced.
2 By-product credits are computed as revenue per financial statements, amortization of deferred revenue and pricing and volume adjustments. For more information please see the realized price reconciliation table on page 34 for these figures.
3 Gold and silver by-product credits do not include variable consideration adjustments with respect to stream arrangements. Variable consideration adjustments are cumulative adjustments to gold and silver stream deferred revenue primarily associated with the net change in mineral reserves and resources or amendments to the mine plan that would change the total expected deliverable ounces under the precious metal streaming arrangement. For the three months and year ended December 31, 2020 the variable consideration adjustments amounted to revenue of $nil and $6,668, respectively. For the three months and year ended December 31, 2019 - $nil and an expense of $16,295, respectively.
4 Depreciation is based on concentrate sold.
5 As per IFRS financial statements.

Peru	Three months ended		Year ended
(in thousands)	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Net pounds of copper produced1	47,519	58,773	161,269	250,940
1 Contained copper in concentrate.

60

Peru	Three months ended				Year ended
	Dec. 31, 2020		Dec. 31, 2019		Dec. 31, 2020		Dec. 31, 2019
Cash cost per pound of copper produced	$000s	$/lb	$000s	$/lb	$000s	$/lb	$000s	$/lb
Mining	24,967	0.53	18,533	0.32	70,724	0.44	82,417	0.33
Milling	39,219	0.83	43,860	0.75	134,096	0.83	159,913	0.64
G&A	14,327	0.30	15,147	0.26	43,105	0.27	56,847	0.23
Onsite costs	78,513	1.66	77,540	1.32	247,925	1.54	299,177	1.19
Treatment & refining	10,082	0.21	15,361	0.26	36,655	0.23	59,809	0.24
Freight & other	9,989	0.21	15,121	0.26	34,794	0.21	53,016	0.21
Cash cost, before by-product credits	98,584	2.08	108,022	1.84	319,374	1.98	412,002	1.64
By-product credits	(28,802)	(0.61)	(28,149)	(0.48)	(85,067)	(0.53)	(121,565)	(0.48)
Cash cost, net of by-product credits	69,782	1.47	79,873	1.36	234,307	1.45	290,437	1.16

Peru	Three months ended				Year ended
	Dec. 31, 2020		Dec. 31, 2019		Dec. 31, 2020		Dec. 31, 2019
Supplementary cash cost information	$000s	$/lb 1	$000s	$/lb 1	$000s	$/lb 1	$000s	$/lb 1
By-product credits2:
Gold3	5,394	0.11	5,782	0.10	17,626	0.11	24,637	0.10
Silver3	13,584	0.29	19,576	0.33	41,870	0.26	68,093	0.27
Molybdenum	9,824	0.21	2,791	0.05	25,571	0.16	28,835	0.11
Total by-product credits	28,802	0.61	28,149	0.48	85,067	0.53	121,565	0.47
Reconciliation to IFRS:
Cash cost, net of by-product credits	69,782		79,873		234,307		290,437
By-product credits	28,802		28,149		85,067		121,565
Treatment and refining charges	(10,082)		(15,361)		(36,655)		(59,809)
Inventory adjustments	(2,188)		(100)		32		504
Share-based compensation expenses	213		27		288		75
Change in product inventory	(6,550)		7,410		(3,883)		(3,313)
Royalties	1,399		2,152		5,121		6,724
Overhead costs related to suspension of activities (cash)	-		-		15,810		-
Depreciation and amortization4	50,861		56,938		184,275		209,126
Cost of sales5	132,237		159,088		484,362		565,309
1 Per pound of copper produced.
2 By-product credits are computed as revenue per financial statements, amortization of deferred revenue and pricing and volume adjustments. For more information, please see the realized price reconciliation table on page 34.
3 Gold and silver by-product credits do not include variable consideration adjustments with respect to stream arrangements.
4 Depreciation is based on concentrate sold.
5 As per IFRS financial statements.

61

Manitoba	Three months ended		Year ended
(in thousands)	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Net pounds of copper produced1	12,619	12,705	48,905	51,487
1 Contained copper in concentrate.

Manitoba	Three months ended				Year ended
	Dec. 31, 2020		Dec. 31, 2019		Dec. 31, 2020		Dec. 31, 2019
Cash cost per pound of copper produced	$000s	$/lb	$000s	$/lb	$000s	$/lb	$000s	$/lb
Mining	46,598	3.69	46,335	3.65	178,308	3.65	186,972	3.63
Milling	11,147	0.88	13,396	1.05	46,057	0.94	49,269	0.96
Refining (zinc)	18,736	1.48	19,464	1.53	71,799	1.47	72,259	1.40
G&A	9,898	0.78	9,551	0.75	46,930	0.96	45,026	0.87
Onsite costs	86,379	6.85	88,746	6.99	343,094	7.02	353,526	6.87
Treatment & refining	4,641	0.37	5,815	0.46	20,233	0.41	23,672	0.46
Freight & other	6,929	0.55	7,014	0.55	27,056	0.55	26,915	0.52
Cash cost, before by-product credits	97,949	7.76	101,575	7.99	390,383	7.98	404,113	7.85
By-product credits	(141,844)	(11.24)	(117,577)	(9.24)	(497,815)	(10.18)	(442,219)	(8.59)
Cash cost, net of by-product credits	(43,895)	(3.48)	(16,002)	(1.26)	(107,432)	(2.20)	(38,106)	(0.75)

62

Manitoba	Three months ended				Year ended
	Dec. 31, 2020		Dec. 31, 2019		Dec. 31, 2020		Dec. 31, 2019
Supplementary cash cost information	$000s	$/lb 1	$000s	$/lb 1	$000s	$/lb 1	$000s	$/lb 1
By-product credits2:
Zinc	77,593	6.15	71,732	5.65	265,105	5.42	284,766	5.53
Gold3	55,616	4.41	39,432	3.10	201,619	4.12	132,262	2.57
Silver3	7,040	0.56	5,147	0.41	25,472	0.52	20,432	0.40
Other	1,595	0.13	1,266	0.10	5,619	0.11	4,759	0.09
Total by-product credits	141,844	11.24	117,577	9.24	497,815	10.18	442,219	8.59
Reconciliation to IFRS:
Cash cost, net of by-product credits	(43,895)		(16,002)		(107,432)		(38,106)
By-product credits	141,844		117,577		497,815		442,219
Treatment and refining charges	(4,641)		(5,815)		(20,233)		(23,672)
Inventory adjustments	2,270		1,768		2,270		1,768
Share-based compensation expenses	706		181		1,112		325
Change in product inventory	2,029		3,267		2,054		(4,413)
Royalties	1,419		1,781		7,686		7,038
Overhead costs related to suspension of activities (cash)	8,232		-		8,232		-
Depreciation and amortization4	47,722		37,007		177,552		135,429
Cost of sales5	155,686		139,764		569,056		520,588
1 Per pound of copper produced.
2 By-product credits are computed as revenue per financial statements, amortization of deferred revenue and pricing and volume adjustments. For more information please see the realized price reconciliation table on page 34.
3 Gold and silver by-product credits do not include variable consideration adjustments with respect to stream arrangements.
4 Depreciation is based on concentrate sold.
5 As per IFRS financial statements.

63

Consolidated	Three months ended				Year ended
	Dec. 31, 2020		Dec. 31, 2019		Dec. 31, 2020		Dec. 31, 2019
All-in sustaining cash cost per pound of copper produced	$000s	$/lb	$000s	$/lb	$000s	$/lb	$000s	$/lb
Cash cost, net of by-product credits	25,887	0.43	63,871	0.90	126,875	0.60	252,331	0.83
Cash sustaining capital expenditures	81,523	1.36	74,361	1.04	257,558	1.23	241,461	0.80
Capitalized exploration1	8,040	0.13	8,807	0.12	8,040	0.04	12,391	0.04
Royalties	2,818	0.05	3,933	0.06	12,807	0.06	13,762	0.05
Sustaining cash cost, net of by-product credits	118,268	1.97	150,972	2.11	405,280	1.93	519,945	1.72
Corporate selling and administrative expenses & regional costs	15,709	0.26	6,702	0.09	45,010	0.21	39,950	0.13
Accretion and amortization of decommissioning and community agreements2	1,006	0.02	677	0.01	4,115	0.02	2,521	0.01
All-in sustaining cash cost, net of by-product credits	134,983	2.24	158,351	2.22	454,405	2.16	562,416	1.86
1 Only includes exploration costs incurred for locations near existing mines.
2 Includes accretion of decommissioning relating to non-productive sites, and accretion and amortization of current community agreements.

Peru	Three months ended				Year ended
	Dec. 31, 2020		Dec. 31, 2019		Dec. 31, 2020		Dec. 31, 2019
Sustaining cash cost per pound of copper produced	$000s	$/lb	$000s	$/lb	$000s	$/lb	$000s	$/lb
Cash cost, net of by-product credits	69,782	1.47	79,873	1.36	234,307	1.45	290,437	1.16
Cash sustaining capital expenditures	43,542	0.92	37,676	0.64	107,994	0.67	108,420	0.43
Capitalized exploration	8,040	0.17	8,000	0.14	8,040	0.05	8,000	0.03
Royalties	1,399	0.03	2,152	0.04	5,121	0.03	6,724	0.03
Sustaining cash cost per pound of copper produced	122,763	2.58	127,701	2.17	355,462	2.20	413,581	1.65

Manitoba	Three months ended				Year ended
	Dec. 31, 2020		Dec. 31, 2019		Dec. 31, 2020		Dec. 31, 2019
Sustaining cash cost per pound of copper produced	$000s	$/lb	$000s	$/lb	$000s	$/lb	$000s	$/lb
Cash cost, net of by-product credits	(43,895)	(3.48)	(16,002)	(1.26)	(107,432)	(2.20)	(38,106)	(0.75)
Cash sustaining capital expenditures	37,981	3.01	36,686	2.89	149,564	3.06	133,041	2.58
Capitalized exploration	-	-	807	0.06	-	-	4,391	0.09
Royalties	1,419	0.11	1,781	0.14	7,686	0.16	7,038	0.14
Sustaining cash cost per pound of copper produced	(4,495)	(0.36)	23,272	1.83	49,818	1.02	106,364	2.07

64

Zinc Cash Cost and Zinc Sustaining Cash Cost

Cash cost per pound of zinc produced ("zinc cash cost") is a non-IFRS measure that management uses as a key performance indicator to assess the performance of our Manitoba operations. This alternative cash cost calculation designates zinc as the primary metal of production as it is the largest component of revenues for our Manitoba business unit and should therefore be less volatile over time than Manitoba cash cost per pound of copper. The calculation is presented in three manners:

-Zinc cash cost, before by-product credits - This measure is gross of by-product revenues and is a function of the efforts and costs incurred to mine and process all ore mined. However, the measure divides this aggregate cost over only pounds of zinc produced, our primary metal of production. This measure is generally less volatile from period to period, as it is not affected by changes in the price received for by-product metals. It is, however, significantly affected by the relative mix of copper concentrate and finished zinc production, where the sale of the copper will occur later, and an increase in production of copper metal will tend to result in an increase in zinc cash cost under this measure.

-Zinc cash cost, net of by-product credits - In order to calculate the net cost to produce and sell zinc, the net of by-product credits measure subtracts the revenues realized from the sale of the metals other than zinc. The by-product revenues from copper, gold, and silver are significant and are integral to the economics of our Manitoba operation. The economics that support our decision to produce and sell zinc would be different if we did not receive revenues from the other significant metals being extracted and processed. This measure provides management and investors with an indication of the minimum zinc price consistent with positive operating margins, assuming realized by-product metal prices are consistent with those prevailing during the reporting period. It also serves as an important operating statistic that management and investors utilize to measure our operating performance at our Manitoba operation versus that of our competitors. However, it is important to understand that if by-product metal prices decline alongside zinc prices, the zinc cash cost net of by-product credits would increase, requiring a higher zinc price than that reported to maintain positive cash flows and operating margins.

-Zinc sustaining cash cost, net of by-product credits - This measure is an extension of zinc cash cost that includes cash sustaining capital expenditures, capitalized exploration, net smelter returns royalties, as well as accretion and amortization for expected decommissioning activities for producing assets. It does not include corporate selling and administrative expenses. It provides a more fulsome measurement of the cost of sustaining production than zinc cash cost, which is focused on operating costs only.

Effective September 30, 2020 and for all comparably disclosed periods, we have included the period's deferred revenue amortization as a by-product credit to reflect the net cost of producing and selling the period's precious metals under our streaming arrangements as we believe doing so allows management and our investors to better evaluate the operating performance of the underlying operations. The variable consideration adjustment required under IFRS 15 related to prior periods is not included as a by-product credit in the current period and hence is disclosed as an adjustment in the non-IFRS cash cost measure reconciliation.

The tables below present a detailed build-up of zinc cash cost and zinc sustaining cash cost, net of by-product credits, for the Manitoba business unit, and reconciliations between zinc cash cost, net of by-product credits, to the most comparable IFRS measures of cost of sales for the three months and year ended December 31, 2020 and 2019. Zinc cash cost, net of by-product credits, may not calculate exactly based on amounts presented in the tables below due to rounding.

65

Manitoba	Three months ended		Year ended
(in thousands)	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Net pounds of zinc produced1	56,974	67,444	260,432	262,585
1 Contained zinc in concentrate.

Manitoba	Three months ended				Year ended
	Dec. 31, 2020		Dec. 31, 2019		Dec. 31, 2020		Dec. 31, 2019
Cash cost per pound of zinc produced	$000s	$/lb	$000s	$/lb	$000s	$/lb	$000s	$/lb
Cash cost, before by-product credits1	97,949	1.72	101,575	1.51	390,383	1.50	404,113	1.54
By-product credits	(98,915)	(1.74)	(78,830)	(1.17)	(363,312)	(1.40)	(294,091)	(1.12)
Zinc cash cost, net of by-product credits	(966)	(0.02)	22,745	0.34	27,071	0.10	110,022	0.42
1 For additional detail on cash cost, before by-product credits please see page 62 of this MD&A.

Manitoba	Three months ended				Year ended
	Dec. 31, 2020		Dec. 31, 2019		Dec. 31, 2020		Dec. 31, 2019
Supplementary cash cost information	$000s	$/lb 1	$000s	$/lb 1	$000s	$/lb 1	$000s	$/lb 1
By-product credits2:
Copper	34,664	0.61	32,985	0.49	130,602	0.50	136,638	0.52
Gold3	55,616	0.98	39,432	0.58	201,619	0.77	132,262	0.50
Silver3	7,040	0.12	5,147	0.08	25,472	0.11	20,432	0.08
Other	1,595	0.03	1,266	0.02	5,619	0.02	4,759	0.02
Total by-product credits	98,915	1.74	78,830	1.17	363,312	1.40	294,091	1.12
Reconciliation to IFRS:
Cash cost, net of by-product credits	(966)		22,745		27,071		110,022
By-product credits	98,915		78,830		363,312		294,091
Treatment and refining charges	(4,641)		(5,815)		(20,233)		(23,672)
Share-based compensation expenses	706		181		1,112		325
Inventory adjustments	2,270		1,768		2,270		1,768
Change in product inventory	2,029		3,267		2,054		(4,413)
Royalties	1,419		1,781		7,686		7,038
Overhead costs related to suspension of activities (cash)	8,232		-		8,232		-
Depreciation and amortization4	47,722		37,007		177,552		135,429
Cost of sales5	155,686		139,764		569,056		520,588
1 Per pound of zinc produced.
2 By-product credits are computed as revenue per financial statements, amortization of deferred revenue and pricing and volume adjustments. For more information please see the realized price reconciliation table on page 34.
3 Gold and silver by-product credits do not include variable consideration adjustments with respect to stream arrangements.
4 Depreciation is based on concentrate sold.
5 As per IFRS financial statements.

66

Manitoba	Three months ended				Year ended
	Dec. 31, 2020		Dec. 31, 2019		Dec. 31, 2020		Dec. 31, 2019
Sustaining cash cost per pound of zinc produced	$000s	$/lb	$000s	$/lb	$000s	$/lb	$000s	$/lb
Zinc cash cost, net of by-product credits	(966)	(0.02)	22,745	0.34	27,071	0.10	110,022	0.42
Cash sustaining capital expenditures	37,981	0.67	36,686	0.54	149,564	0.57	133,041	0.51
Capitalized exploration	-	-	807	0.01	-	-	4,391	0.02
Royalties	1,419	0.02	1,781	0.03	7,686	0.03	7,038	0.03
Sustaining cash cost per pound of zinc produced	38,434	0.67	62,019	0.92	184,321	0.71	254,492	0.97

67

Combined Unit Cost & Zinc Plant Unit Cost Reconciliation

Combined unit cost ("unit cost") and zinc plant unit cost is a non-IFRS measure that management uses as a key performance indicator to assess the performance of our mining and milling operations. Combined unit cost and zinc plant unit cost are calculated by dividing the cost of sales by mill throughput and refined zinc metal produced, respectively. This measure is utilized by management and investors to assess our cost structure and margins and compare it to similar information provided by other companies in our industry. Unlike cash cost, this measure is not impacted by variability in by-product commodity prices since there are no by-product deductions; costs associated with profit-sharing and similar costs are excluded because of their correlation to external metal prices. In addition, the unit costs are reported in the functional currency of the operation which minimizes the impact of foreign currency fluctuations. In all, the unit cost measures provide an alternative perspective on operating cost performance with minimal impact from external market prices. In the first half of 2020, as a result of the temporary suspension of operations in Peru, fixed overhead production costs incurred during the suspension were directly charged to cost of sales. These costs did not contribute to production of inventory and were therefore excluded from the calculation of combined unit costs.

The tables below present a detailed combined unit cost and zinc plant unit costs for the Manitoba business unit and combined unit cost for the Peru business unit, and reconciliations between these measures to the most comparable IFRS measures of cost of sales for the three months and year ended  December 31, 2020 and 2019.

Peru	Three months ended		Year ended
(in thousands except unit cost per tonne)	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Combined unit cost per tonne processed
Mining	24,967	18,533	70,724	82,417
Milling	39,219	43,860	134,096	159,913
G&A 1	14,327	15,147	43,105	56,847
Other G&A 2	213	(1,339)	865	(1,051)
Unit cost	78,726	76,201	248,790	298,126
Tonnes ore milled	7,742	7,474	26,297	31,387
Combined unit cost per tonne	10.17	10.20	9.46	9.50
Reconciliation to IFRS:
Unit cost	78,726	76,201	248,790	298,126
Freight & other	9,989	15,121	34,794	53,016
Other G&A	(213)	1,339	(865)	1,051
Share-based compensation expenses	213	27	288	75
Inventory adjustments	(2,188)	(100)	32	504
Change in product inventory	(6,550)	7,410	(3,883)	(3,313)
Royalties	1,399	2,152	5,121	6,724
Overhead costs related to suspension of activities (cash)	-	-	15,810	-
Depreciation and amortization	50,861	56,938	184,275	209,126
Cost of sales3	132,237	159,088	484,362	565,309
1 G&A as per cash cost reconciliation above.
2 Other G&A primarily includes profit sharing costs.
3 As per IFRS financial statements.

68

Manitoba	Three months ended		Year ended
(in thousands except tonnes ore milled and unit cost per tonne)	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Combined unit cost per tonne processed
Mining	46,598	46,335	178,308	186,972
Milling	11,147	13,396	46,057	49,269
G&A 1	9,898	9,551	46,930	45,026
Less: G&A allocated to zinc metal production	(3,301)	(2,966)	(14,431)	(12,507)
Less: Other G&A related to profit sharing costs	-	-	(10)	(85)
Unit cost	64,342	66,316	256,854	268,675
USD/CAD implicit exchange rate	1.30	1.32	1.34	1.33
Unit cost - C$	83,669	87,528	344,672	356,562
Tonnes ore milled	598,287	685,151	2,618,065	2,652,306
Combined unit cost per tonne - C$	140	128	132	134
Reconciliation to IFRS:
Unit cost	64,342	66,316	256,854	268,675
Freight & other	6,929	7,014	27,056	26,915
Refined (zinc)	18,736	19,464	71,799	72,259
G&A allocated to zinc metal production	3,301	2,966	14,431	12,507
Other G&A related to profit sharing	-	-	10	85
Share-based compensation expenses	706	181	1,112	325
Inventory adjustments	2,270	1,768	2,270	1,768
Change in product inventory	2,029	3,267	2,054	(4,413)
Royalties	1,419	1,781	7,686	7,038
Overhead costs related to suspension of activities (cash)	8,232	-	8,232	-
Depreciation and amortization	47,722	37,007	177,552	135,429
Cost of sales2	155,686	139,764	569,056	520,588
1 G&A as per cash cost reconciliation above.
2 As per IFRS financial statements.

69

Manitoba	Three months ended		Year ended
(in thousands except zinc plant unit cost per pound)	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Zinc plant unit cost
Zinc plant costs	18,736	19,464	71,799	72,259
G&A 1	9,898	9,551	46,930	45,026
Less: G&A allocated to other areas	(6,597)	(6,585)	(32,489)	(32,434)
Less: Other G&A related to profit sharing	-	-	(10)	(85)
Zinc plant unit cost	22,037	22,430	86,230	84,766
USD/CAD implicit exchange rate	1.30	1.32	1.34	1.33
Zinc plant unit cost - C$	28,700	29,608	115,400	112,447
Refined metal produced (in pounds)	63,533	61,324	246,117	227,828
Zinc plant unit cost per pound - C$	0.45	0.48	0.47	0.49
Reconciliation to IFRS:
Zinc plant unit cost	22,037	22,430	86,230	84,766
Freight & other	6,929	7,014	27,056	26,915
Mining	46,598	46,335	178,308	186,972
Milling	11,147	13,396	46,057	49,269
G&A allocated to other areas	6,597	6,585	32,489	32,434
Other G&A related to profit sharing	-	-	10	85
Share-based compensation expenses	706	181	1,112	325
Inventory adjustments	2,270	1,768	2,270	1,768
Change in product inventory	2,029	3,267	2,054	(4,413)
Royalties	1,419	1,781	7,686	7,038
Overhead costs related to suspension of activities (cash)	8,232	-	8,232	-
Depreciation and amortization	47,722	37,007	177,552	135,429
Cost of sales2	155,686	139,764	569,056	520,588
1 G&A as per cash cost reconciliation above.
2 As per IFRS financial statements.

ACCOUNTING CHANGES

New standards and interpretations not yet adopted

For information on new standards and interpretations not yet adopted, refer to note 4 of our audited consolidated financial statements for the year ended December 31, 2020.

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CRITICAL ACCOUNTING JUDGEMENTS AND ESTIMATES

The preparation of the consolidated financial statements in conformity with IFRS requires us to make judgements, estimates and assumptions that affect the application of accounting policies, reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the consolidated financial statements, and reported amounts of revenue and expenses during the reporting period. Actual results may differ from these estimates.

We review these estimates and underlying assumptions on an ongoing basis based on our experience and other factors, including expectations of future events that we believe to be reasonable under the circumstances. Revisions to accounting estimates are recognized in the period in which the estimates are revised and in any future periods affected. Certain accounting estimates and judgements have been identified as being "critical" to the presentation of our financial condition and results of operations because they require us to make subjective and/or complex judgments about matters that are inherently uncertain; or there is a reasonable likelihood that materially different amounts could be reported under different conditions or using different assumptions and estimates.

The following are significant judgements and estimates impacting the consolidated financial statements:

-Judgements and estimates that affect multiple areas of the consolidated financial statements:

-Mineral reserves and resources which form the basis of life of mine plans which are utilized in impairment testing, timing of payments related to decommissioning obligations and depreciation of capital assets. We estimate our mineral reserves and resources based on information compiled by qualified persons as defined in accordance with NI 43-101;

-Identification of a business combination and acquisition method accounting;

-IFRS 15 - Revenue - adoption for stream transactions

-Determination of functional currency;

-Income and mining taxes, including estimates of future taxable profit which impacts the ability to realize deferred tax assets on our balance sheet; and

-In respect of the outcome of uncertain future events as it concerns recognizing contingent liabilities.

-Judgements and estimates that relate mainly to assets (these judgements may also affect other areas of the consolidated financial statements):

-Property, plant and equipment:

-Cost allocations for mine development;

-Mining properties expenditures capitalized;

-Classification of supply costs as related to capital development or inventory acquisition;

-Determining when exploration and evaluation assets should be transferred to capital works in progress within property, plant and equipment;

-Determination of when an asset or group of assets is in the condition and location to be ready for use as intended by management for the purposes of commencing depreciation;

-Componentization;

-Assessment of impairment, including determination of cash generating units and assessing for indicators of impairment;

-Recoverability of exploration and evaluation assets, including determination of cash generating units and assessing for indications of impairment;

-Determining whether assets meet criteria for classification as held for sale;

-Units of production depreciation;

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-Plant and equipment estimated useful lives and residual values;

-Capitalized stripping costs; and

-Finite life intangible assets.

-Impairment (and reversal of impairment) of non-financial assets:

-Future production levels and timing;

-Operating and capital costs;

-Future commodity prices;

-Foreign exchange rates; and

-Risk adjusted discount rates.

-Valuation of acquired assets; and

-In process inventory quantities, inventory cost allocations and inventory valuation.

-Judgements and estimates that relate mainly to liabilities (these judgements may also affect other areas of the consolidated financial statements):

-Determining the accounting classification of the precious metals stream deposit;

-Determination of deferred revenue per unit related to the precious metals stream transactions and determination of current portion of deferred revenue, which is based on timing of future sales, and adjustments of the expected conversion of resource to reserves;

-Pensions and other employee benefits;

-Decommissioning, restoration and similar liabilities including estimated future costs and timing of spending;

-Contingent liabilities; and

-Capital commitments.

-Estimates that relate mainly to the consolidated income statements:

-Assaying used to determine revenues and recoverability of inventories.

For more information on judgements and estimates, refer to note 2 of our consolidated financial statements for the year ended December 31, 2020.

DISCLOSURE CONTROLS AND PROCEDURES AND INTERNAL CONTROL OVER FINANCIAL REPORTING

Disclosure controls and procedures ("DC&P")

Management is responsible for establishing and maintaining adequate DC&P. As of December 31, 2020, we have evaluated the effectiveness of the design and operation of our DC&P in accordance with requirements of National Instrument 52-109 of the Canadian Securities Commission ("NI 52-109") and the Sarbanes Oxley Act of 2002 (as adopted by the US Securities and Exchange Commission). Our Chief Executive Officer ("CEO") and Chief Financial Officer ("CFO") supervised and participated in this evaluation.

As of December 31, 2020, based on management's evaluation, our CEO and CFO concluded that our DC&P were effective to ensure that information required to be disclosed by us in reports we file or submit is recorded, processed, summarized and reported within the time periods specified in securities legislation and is accumulated and communicated to our management, including our CEO and CFO, to allow timely decisions regarding required disclosure.

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Internal control over financial reporting ("ICFR")

Management of Hudbay is responsible for establishing and maintaining adequate ICFR. Under the supervision and with the participation of our Chief Executive Officer and Chief Financial Officer, we evaluated the effectiveness of our ICFR as of December 31, 2020 based upon the Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission. Based on management's evaluation, our CEO and CFO concluded that our ICFR was effective as of December 31, 2020.

The effectiveness of the Company's ICFR as of December 31, 2020 has been audited by Deloitte LLP, Independent Registered Public Accounting Firm as stated in their report immediately preceding the Company's audited consolidated financial statements for the year ended December 31, 2020.

Changes in ICFR

We did not make any changes to ICFR during the year ended December 31, 2020 that materially affected, or are reasonably likely to materially affect, our ICFR.

Inherent limitations of controls and procedures

All internal control systems, no matter how well designed, have inherent limitations. As a result, even systems determined to be effective may not prevent or detect misstatements on a timely basis, as systems can provide only reasonable assurance that the objectives of the control system are met. In addition, projections of any evaluation of the effectiveness of ICFR 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 change.

NOTES TO READER

Forward-Looking Information

This MD&A contains forward-looking information within the meaning of applicable Canadian and United States securities legislation. All information contained in this MD&A, other than statements of current and historical fact, is forward-looking information. Often, but not always, forward-looking information can be identified by the use of words such as "plans", "expects", "budget", "guidance", "scheduled", "estimates", "forecasts", "strategy", "target", "intends", "objective", "goal", "understands", "anticipates" and "believes" (and variations of these or similar words) and statements that certain actions, events or results "may", "could", "would", "should", "might" "occur" or "be achieved" or "will be taken" (and variations of these or similar expressions). All of the forward-looking information in this MD&A is qualified by this cautionary note.

Forward-looking information includes, but is not limited to, production, cost and capital and exploration expenditure guidance and potential revisions to such guidance, anticipated production at our mines and processing facilities, expectations regarding the impact of the COVID-19 pandemic on our operations, financial condition and prospects and our ability to effectively engage with local communities in Peru and other stakeholders, expectations regarding the timing of mining activities at the Pampacancha deposit and any additional delivery obligations under the Constancia stream agreement, the anticipated timing, cost and benefits of developing the Rosemont project and the outcome of litigation challenging Rosemont's permits, expectations regarding the Helvetia exploration program, expectations regarding the Lalor gold strategy, including the refurbishment, commissioning and ramp-up of the New Britannia mill and expectations regarding the mine plan for the 1901 deposit, increasing the mining rate at Lalor and optimizing the Stall and New Britannia mills, the possibility of converting inferred mineral resource estimates to higher confidence categories, the potential and our anticipated plans for advancing our mining properties surrounding Constancia and elsewhere in Peru, anticipated mine plans, anticipated metals prices and the anticipated sensitivity of our financial performance to metals prices, events that may affect our operations and development projects, anticipated cash flows from operations and related liquidity requirements, the anticipated effect of external factors on revenue, such as commodity prices, estimation of mineral reserves and resources, mine life projections, reclamation costs, economic outlook, government regulation of mining operations, and business and acquisition strategies. Forward-looking information is not, and cannot be, a guarantee of future results or events. Forward-looking information is based on, among other things, opinions, assumptions, estimates and analyses that, while considered reasonable by us at the date the forward-looking information is provided, inherently are subject to significant risks, uncertainties, contingencies and other factors that may cause actual results and events to be materially different from those expressed or implied by the forward-looking information.

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The material factors or assumptions that we identified and were applied by us in drawing conclusions or making forecasts or projections set out in the forward-looking information include, but are not limited to:

-our ability to continue to operate safely and at full capacity during the COVID-19 pandemic;

-the ability to achieve production and unit cost guidance;

-no significant interruptions to our operations or significant delays to our development projects in Manitoba and Peru due to the COVID-19 pandemic;

-the timing of development and production activities on the Pampacancha deposit;

-the timing for reaching additional agreements with individual community members and no significant unanticipated delays to the development of Pampacancha;

-the successful completion of the New Britannia project on budget and on schedule;

-the successful outcome of the Rosemont litigation;

-the successful renegotiation of collective agreements with the labour unions that represent certain of our employees in Manitoba and Peru;

-the success of mining, processing, exploration and development activities;

-the scheduled maintenance and availability of our processing facilities;

-the accuracy of geological, mining and metallurgical estimates;

-anticipated metals prices and the costs of production;

-the supply and demand for metals we produce;

-the supply and availability of all forms of energy and fuels at reasonable prices;

-no significant unanticipated operational or technical difficulties;

-the execution of our business and growth strategies, including the success of our strategic investments and initiatives;

-the availability of additional financing, if needed;

-the ability to complete project targets on time and on budget and other events that may affect our ability to develop our projects;

-the timing and receipt of various regulatory and governmental approvals;

-the availability of personnel for our exploration, development and operational projects and ongoing employee relations;

-maintaining good relations with the labour unions that represent certain of our employees in Manitoba and Peru;

-maintaining good relations with the communities in which we operate, including the neighbouring Indigenous communities and local governments;

-no significant unanticipated challenges with stakeholders at our various projects;

-no significant unanticipated events or changes relating to regulatory, environmental, health and safety matters;

-no contests over title to our properties, including as a result of rights or claimed rights of Indigenous peoples or challenges to the validity of our unpatented mining claims;

-the timing and possible outcome of pending litigation and no significant unanticipated litigation;

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-certain tax matters, including, but not limited to current tax laws and regulations and the refund of certain value added taxes from the Canadian and Peruvian governments; and

-no significant and continuing adverse changes in general economic conditions or conditions in the financial markets (including commodity prices and foreign exchange rates).

The risks, uncertainties, contingencies and other factors that may cause actual results to differ materially from those expressed or implied by the forward-looking information may include, but are not limited to, risks associated with the COVID-19 pandemic and its effect on our operations, financial condition, projects and prospects, the possibility of a global recession arising from the COVID-19 pandemic and attempts to control it, the political situation in Peru, risks generally associated with the mining industry, such as economic factors (including future commodity prices, currency fluctuations, energy prices and general cost escalation), uncertainties related to the development and operation of our projects, risks related to the U.S. district court's recent decisions to set aside the U.S. Forest Service's FROD and the Biological Opinion for Rosemont and related appeals and other legal challenges, risks related to the new Lalor mine plan, including the schedule for the refurbishment of the New Britannia mill and the ability to convert inferred mineral resource estimates to higher confidence categories, risks related to the schedule for mining the Pampacancha deposit (including risks associated with COVID-19 and risks associated with reaching additional agreements with individual community members and the impact of any schedule delays), dependence on key personnel and employee and union relations, risks related to political or social unrest or change, risks in respect of Indigenous and community relations, rights and title claims, operational risks and hazards, including the cost of maintaining and upgrading the Company's tailings management facilities and any unanticipated environmental, industrial and geological events and developments and the inability to insure against all risks, failure of plant, equipment, processes, transportation and other infrastructure to operate as anticipated, compliance with government and environmental regulations, including permitting requirements and anti-bribery legislation, depletion of our reserves, volatile financial markets that may affect our ability to obtain additional financing on acceptable terms, the failure to obtain required approvals or clearances from government authorities on a timely basis, uncertainties related to the geology, continuity, grade and estimates of mineral reserves and resources, and the potential for variations in grade and recovery rates, uncertain costs of reclamation activities, our ability to comply with our pension and other post-retirement obligations, our ability to abide by the covenants in our debt instruments and other material contracts, tax refunds, hedging transactions, as well as the risks discussed under the heading "Financial Risk Management" in this MD&A and under the heading  "Risk Factors" in our most recent Annual Information Form.

Should one or more risk, uncertainty, contingency or other factor materialize or should any factor or assumption prove incorrect, actual results could vary materially from those expressed or implied in the forward-looking information. Accordingly, you should not place undue reliance on forward-looking information. We do not assume any obligation to update or revise any forward-looking information after the date of this MD&A or to explain any material difference between subsequent actual events and any forward-looking information, except as required by applicable law.

Note to United States Investors

This MD&A has been prepared in accordance with the requirements of the securities laws in effect in Canada, which may differ materially from the requirements of United States securities laws applicable to U.S. issuers.

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Qualified Person

The technical and scientific information in this MD&A related to the Constancia mine and Rosemont project has been approved by Cashel Meagher, P. Geo, our Senior Vice President and Chief Operating Officer. The technical and scientific information related to our other material mineral projects contained in this MD&A has been approved by Olivier Tavchandjian, P. Geo, our Vice President, Exploration and Geology. Messrs. Meagher and Tavchandjian are qualified persons pursuant to NI 43-101. For a description of the key assumptions, parameters and methods used to estimate mineral reserves and resources at Hudbay's material properties, as well as data verification procedures and a general discussion of the extent to which the estimates of scientific and technical information may be affected by any known environmental, permitting, legal title, taxation, sociopolitical, marketing or other relevant factors, please see the technical reports for our material properties as filed by us on SEDAR at www.sedar.com.

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SUMMARY OF RESULTS

The following unaudited tables set out a summary of quarterly and annual results for the Company:

		2020										2019										2018
		2020		Q4		Q3		Q2		Q1		2019		Q4		Q3		Q2		Q1		2018		Q4
Consolidated Financial Condition ($000s)
Cash and cash equivalents		$	439,135	$	439,135	$	449,014	$	391,136	$	305,997	$	396,146	$	396,146	$	398,438	$	489,527	$	485,867	$	515,497	$	515,497
Total long-term debt		$	1,135,675	1,135,675		1,175,104		988,418		988,074		985,255		985,255		976,272		977,196		977,413		981,030		981,030
Net debt1		$	696,540	696,540		726,090		597,282		682,077		589,109		589,109		577,834		487,669		491,546		465,533		465,533
Consolidated Financial Performance ($000s except per share amounts)
Revenue		$	1,092,418	$	322,290	$	316,108	$	208,913	$	245,105	$	1,237,439	$	324,485	$	291,282	$	329,414	$	292,258	$	1,472,366	$	351,773
Cost of sales		$	1,053,418	287,923		276,830		221,567		267,096		1,085,897		298,852		260,327		286,272		240,446		1,098,626		276,547
Earnings (loss) before tax		$	(179,089)	911		(23,944)		(74,604)		(81,452)		(452,763)		(42,352)		(348,367)		(43,931)		(18,108)		170,837		17,650
Earnings (loss)		$	(144,584)	7,406		(23,955)		(51,901)		(76,134)		(343,810)		(1,455)		(274,796)		(54,145)		(13,412)		85,416		(3,510)
Basic and diluted (loss) earnings per share		$	(0.55)	$	0.03	$	(0.09)	$	(0.20)	$	(0.29)	$	(1.32)	$	(0.01)	$	(1.05)	$	(0.21)	$	(0.05)	$	0.33	$	(0.01)
Adjusted (loss) earnings per share 1		$	(0.46)	$	(0.06)	$	(0.10)	$	(0.15)	$	(0.15)	$	(0.18)	$	(0.09)	$	(0.09)	$	(0.03)	$	0.03	$	0.40	$	0.05
Operating cash flow before change in non-cash working capital 1		$	241,863	86,071		84,383		29,457		41,951		307,284		69,141		71,204		81,259		85,684		501,352		104,264
Adjusted EBITDA 1, 2		$	306.7	106.9		96.1		49.1		55.0		358.5		82.2		76.2		95.9		104.2		554.8		120.7
Consolidated Operational Performance
Contained metal in concentrate produced 3
Copper	tonnes	95,333		27,278		25,395		18,026		24,635		137,179		32,422		36,422		30,363		37,972		154,550		37,238
Gold	ounces	124,622		32,376		29,277		32,614		30,355		114,692		32,712		28,319		28,099		25,562		119,882		28,051
Silver	ounces	2,750,873		730,679		671,685		580,817		767,692		3,585,330		930,137		924,191		811,807		919,195		3,954,469		1,014,684
Zinc	tonnes	118,130		25,843		30,570		31,222		30,495		119,106		30,592		28,639		31,838		28,037		115,588		27,408
Molybdenum	tonnes	1,204		333		392		124		354		1,272		372		262		334		304		904		329
Payable metal in concentrate sold
Copper	tonnes	88,888		22,963		25,903		15,951		24,072		128,519		33,715		29,916		33,171		31,717		147,923		36,350
Gold	ounces	122,949		35,179		30,605		30,590		26,574		108,999		30,344		25,488		30,538		22,629		113,097		25,861
Silver	ounces	2,585,586		762,384		705,495		541,785		575,922		3,452,926		909,423		756,296		804,301		982,906		3,372,353		909,500
Zinc 4	tonnes	109,347		28,431		26,520		27,604		26,792		104,319		28,001		29,140		24,224		22,954		115,723		31,134
Molybdenum	tonnes	1,321		457		313		120		431		1,186		199		334		419		234		819		447
Cash cost 1	$/lb	0.60		$	0.43	$	0.65	$	0.29	$	0.98	$	0.83	$	0.90	$	0.71	$	0.95	$	0.81	$	0.66	$	0.63
All-in sustaining cash cost 1	$/lb	2.16		$	2.24	$	2.25	$	1.91	$	2.17	$	1.86	$	2.22	$	1.69	$	1.98	$	1.58	$	1.32	$	1.49
1 Net debt, adjusted (loss) earnings per share, adjusted EBITDA, cash cost, and all-in sustaining cash cost per pound of copper produced, net of by-product credits, are non-IFRS financial performance measures with no standardized definition under IFRS. For further information and a detailed reconciliation, please see discussion under the "Non-IFRS Financial Reporting Measures" section of this MD&A. All comparative cash cost and all-in sustaining cash cost per pound of copper produced, net of by-product credits figures have been restated as indicated on page 57.
2 In millions.
3 Metal reported in concentrate is prior to deductions associated with smelter contract terms.
4 Includes refined zinc metal sold.

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		2020										2019										2018
		2020		Q4		Q3		Q2		Q1		2019		Q4		Q3		Q2		Q1		2018		Q4
Peru Operations
Ore mined1	tonnes	27,529,950		9,313,784		8,455,668		2,775,286		6,985,212		33,308,369		8,049,063		8,413,367		8,211,166		8,634,773		34,372,156		7,329,423
Copper	%	0.32		0.31		0.31		0.34		0.34		0.43		0.41		0.44		0.39		0.47		0.49		0.47
Gold	g/tonne	0.03		0.03		0.03		0.04		0.03		0.04		0.04		0.05		0.04		0.04		0.05		0.05
Silver	g/tonne	2.75		2.61		2.55		2.90		3.10		3.76		3.87		3.93		3.68		3.55		4.15		4.16
Molybdenum	%	0.02		0.01		0.02		0.02		0.01		0.02		0.02		0.02		0.01		0.01		0.01		0.01
Ore milled	tonnes	26,297,318		7,741,714		7,480,655		4,355,482		6,719,466		31,387,281		7,474,136		8,240,344		7,679,739		7,993,062		31,282,610		7,657,943
Copper	%	0.34		0.33		0.33		0.34		0.34		0.42		0.42		0.44		0.37		0.46		0.47		0.48
Gold	g/tonne	0.03		0.03		0.03		0.04		0.03		0.04		0.04		0.04		0.04		0.04		0.05		0.06
Silver	g/tonne	2.87		2.74		2.68		3.04		3.13		3.64		3.86		3.76		3.40		3.53		4.08		4.26
Molybdenum	%	0.02		0.02		0.02		0.01		0.02		0.02		0.02		0.02		0.01		0.01		0.01		0.01
Copper recovery	%	83.0		85.3		83.3		76.6		84.3		85.7		85.6		86.0		84.7		86.2		82.6		84.8
Gold recovery	%	49.8		52.7		51.6		43.4		50.2		48.1		50.0		48.3		41.3		52.2		47.4		48.5
Silver recovery	%	66.9		70.1		66.7		59.6		68.2		68.2		68.2		68.9		65.7		69.9		66.5		71.6
Molybdenum recovery	%	29.4		28.4		30.4		19.9		35.0		26.5		30.8		20.2		28.9		26.8		21.6		30.5
Contained metal in concentrate
Copper	tonnes	73,150		21,554		20,803		11,504		19,290		113,825		26,659		31,091		24,232		31,843		122,178		30,834
Gold	ounces	12,395		3,689		3,333		2,311		3,062		19,723		5,007		5,565		3,794		5,357		24,189		7,522
Silver	ounces	1,622,972		477,775		430,208		253,687		461,302		2,504,769		631,774		686,258		551,807		634,930		2,729,859		750,747
Molybdenum	tonnes	1,204		333		392		124		354		1,272		372		262		334		304		904		329
Precious metals2	ounces	30,630		9,058		8,167		5,161		8,245		55,506		14,033		15,369		11,677		14,427		63,187		18,247
Payable metal sold
Copper	tonnes	68,506		18,583		21,654		9,023		19,247		106,184		28,430		25,314		25,778		26,662		116,449		31,252
Gold	ounces	10,986		3,297		3,753		1,317		2,618		18,956		4,824		3,858		4,056		6,218		20,420		7,262
Silver	ounces	1,518,548		480,843		433,595		242,519		361,591		2,452,496		666,839		529,139		504,259		752,259		2,255,700		672,756
Molybdenum	tonnes	1,321		457		313		120		431		1,186		199		334		419		234		819		447
Peru combined unit operating cost,3, 4	$/tonne	$	9.46	$	10.17	$	9.85	$	7.77	$	9.31	$	9.50	$	10.20	$	8.63	$	10.39	$	8.87	$	9.44	$	9.88

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Peru cash cost4	$/lb	$	1.45	$	1.47	$	1.54	$	1.31	$	1.42	$	1.16	$	1.36	$	1.06	$	1.39	$	0.90	$	1.14	$	1.05
Peru sustaining cash cost4	$/lb	$	2.20	$	2.58	$	2.29	$	1.84	$	1.91	$	1.65	$	2.17	$	1.53	$	1.87	$	1.13	$	1.37	$	1.40
1 Reported tonnes and grade for ore mined are estimates based on mine plan assumptions and may not fully reconcile to ore milled.
2 Precious metals production includes gold and silver production on a gold-equivalent basis. For 2018 and 2019, silver is converted to gold at a ratio of 70:1. For 2020, silver is converted to gold at a ratio of 89:1.
3 Reflects combined mine, mill and general and administrative ("G&A") costs per tonne of ore milled. Reflects the deduction of expected capitalized stripping costs.
4 Combined unit costs,  cash cost, and sustaining cash cost per pound of copper produced, net of by-product credits, are non-IFRS financial performance measures with no standardized definition under IFRS. For further information and a detailed reconciliation, please see the discussion under the "Non-IFRS Financial Reporting Measures" section of this MD&A .All comparative cash cost and all-in sustaining cash cost per pound of copper produced, net of by-product credits figures have been restated as indicated on page 57.

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		2020					2019					2018
		2020	Q4	Q3	Q2	Q1	2019	Q4	Q3	Q2	Q1	2018 1	Q4
Manitoba Operations
Lalor ore mined	tonnes	1,654,240	468,101	357,213	407,408	421,518	1,536,780	390,140	346,456	411,701	388,483	1,260,241	317,616
Copper	%	0.74	0.80	0.66	0.77	0.70	0.75	0.80	0.68	0.73	0.76	0.74	0.82
Zinc	%	5.73	5.54	5.98	6.05	5.43	6.36	6.20	6.16	6.34	6.70	6.25	6.80
Gold	g/tonne	2.51	2.79	2.28	2.64	2.27	2.16	2.63	2.21	2.12	1.68	2.19	2.09
Silver	g/tonne	25.31	24.96	21.23	28.4	26.18	25.51	28.38	25.56	22.32	25.96	25.39	24.66
777 ore mined	tonnes	991,576	164,856	264,905	281,890	279,925	1,109,782	269,342	273,319	288,599	278,522	966,567	244,613
Copper	%	1.40	1.89	0.98	1.72	1.18	1.37	1.17	1.33	1.34	1.65	1.47	1.76
Zinc	%	3.88	2.98	3.95	4.13	4.11	3.22	3.33	3.01	3.37	3.18	4.43	3.46
Gold	g/tonne	1.90	1.85	2.01	1.91	1.82	1.61	1.52	1.63	1.60	1.70	1.83	1.61
Silver	g/tonne	24.13	21.64	24.25	25.73	23.86	18.67	18.52	15.42	18.92	21.75	28.34	24.37
Reed ore mined	tonnes	-	-	-	-	-	-	-	-	-	-	326,363	-
Copper	%	-	-	-	-	-	-	-	-	-	-	3.35	-
Zinc	%	-	-	-	-	-	-	-	-	-	-	0.90	-
Gold	g/tonne	-	-	-	-	-	-	-	-	-	-	0.77	-
Silver	g/tonne	-	-	-	-	-	-	-	-	-	-	9.08	-
Stall Concentrator:
Ore milled	tonnes	1,412,751	372,624	335,739	334,601	369,787	1,290,300	310,622	318,539	339,616	321,523	1,201,466	313,995
Copper	%	0.73	0.79	0.68	0.76	0.70	0.73	0.80	0.64	0.71	0.78	0.72	0.84
Zinc	%	5.76	5.47	6.11	6.16	5.38	6.39	6.24	6.22	6.36	6.75	6.38	6.83
Gold	g/tonne	2.55	2.88	2.35	2.70	2.28	2.13	2.60	2.12	2.08	1.75	2.15	2.09
Silver	g/tonne	25.37	24.43	22.08	28.72	26.28	25.48	28.12	25.16	22.03	26.89	25.27	24.58
Copper recovery	%	86.2	87.1	84.0	86.6	86.5	85.9	85.9	84.4	85.6	87.2	85.7	88.6
Zinc recovery	%	91.9	90.9	92.7	92.4	91.4	91.1	90.7	91.8	91.2	90.7	92.8	91.9
Gold recovery	%	60.0	59.5	57.4	62.3	60.9	56.8	61.1	54.3	52.5	59.1	57.6	57.1
Silver recovery	%	60.4	60.3	57.5	62.1	61.1	60.4	62.9	57.4	56.5	64.2	59.2	60.7
Flin Flon Concentrator:
Ore milled	tonnes	1,205,314	225,663	322,156	324,906	332,589	1,362,006	374,529	331,216	367,017	289,244	1,423,744	259,569
Copper	%	1.28	1.59	0.99	1.52	1.11	1.27	1.11	1.22	1.26	1.55	1.90	1.73
Zinc	%	4.21	3.87	4.07	4.41	4.36	3.78	4.05	3.64	3.84	3.49	3.71	3.55
Gold	g/tonne	1.96	1.99	1.99	1.99	1.88	1.72	1.75	1.74	1.71	1.66	1.63	1.62
Silver	g/tonne	24.26	22.65	24.01	25.56	24.33	19.84	20.56	17.36	19.82	21.78	23.48	24.79
Copper recovery	%	86.0	88.1	83.9	87.3	84.1	88.0	86.9	89.1	88.0	88.1	92.3	90.4
Zinc recovery	%	85.5	83.9	87.9	84.9	85.0	85.5	85.8	86.7	86.0	82.9	84.2	83.7
Gold recovery	%	56.0	56.6	55.3	58.6	53.5	59.4	56.1	59.1	61.3	61.8	64.5	62.8
Silver recovery	%	45.9	46.5	42.0	50.7	44.3	50.8	49.2	48.7	53.0	52.3	60.2	54.8
1 Mining activities at Reed were completed in August 2018.

80

		2020										2019										2018
		2020		Q4		Q3		Q2		Q1		2019		Q4		Q3		Q2		Q1		2018		Q4
Manitoba Operations (continued)
Total Manitoba contained metal in concentrate produced
Copper	tonnes	22,183		5,724		4,592		6,522		5,345		23,354		5,763		5,331		6,131		6,129		32,272		6,404
Zinc	tonnes	118,130		25,843		30,570		31,222		30,495		119,106		30,592		28,639		31,838		28,037		115,588		27,408
Gold	ounces	112,227		28,687		25,944		30,303		27,293		94,969		27,705		22,754		24,305		20,205		95,693		20,529
Silver	ounces	1,127,901		252,904		241,477		327,130		306,390		1,080,561		298,363		237,933		260,000		284,265		1,224,610		263,937
Precious metals1	ounces	124,900		31,529		28,657		33,979		30,736		110,406		31,967		26,153		28,019		24,266		113,188		24,300
Total Manitoba payable metal sold
Copper	tonnes	20,382		4,380		4,249		6,928		4,825		22,335		5,285		4,602		7,393		5,055		31,474		5,098
Zinc2	tonnes	109,347		28,431		26,520		27,604		26,792		104,346		28,001		29,140		24,224		22,954		115,723		31,134
Gold	ounces	111,963		31,882		26,852		29,273		23,956		90,043		25,520		21,630		26,482		16,411		92,677		18,599
Silver	ounces	1,067,038		281,541		271,900		299,266		214,331		1,000,430		242,584		227,157		300,042		230,647		1,116,653		236,744
Manitoba combined unit operating cost3,4	C$/tonne	$	132	$	140	$	126	$	135	$	127	$	134	$	128	$	130	$	135	$	146	$	130	$	143
Manitoba cash cost4	$/lb	$	(2.20)	$	(3.48)	$	(3.41)	$	(1.52)	$	(0.62)	$	(0.75)	$	(1.26)	$	(1.31)	$	(0.79)	$	0.29	$	(1.16)	$	(1.47)
Manitoba sustaining cash cost4	$/lb	$	1.02	$	(0.36)	$	0.83	$	1.15	$	2.53	$	2.07	$	1.83	$	2.15	$	1.55	$	2.68	$	0.66	$	1.16
1 Precious metals production includes gold and silver production on a gold-equivalent basis. For 2018 and 2019, silver is converted to gold at a ratio of 70:1. For 2020, silver is converted to gold at a ratio of 89:1.
2 Includes refined zinc metal sold.
3 Reflects combined mine, mill and G&A costs per tonne of milled ore.

81

EX-99.4

Exhibit 99.4

Disclosure Pursuant to Section 1503(a) of the Dodd-Frank Wall Street Reform and Consumer Protection Act

Hudbay Minerals Inc. ("Hudbay") is committed to the health and safety of its employees and to providing an incident free workplace.

Hudbay's U.S. mining operations are subject to Federal Mine Safety and Health Administration (the "MSHA") regulation under the U.S. Federal Mine Safety and Health Act of 1977 (the "FMSH Act"). The MSHA inspects Hudbay's mines on a regular basis and issues various citations and orders when it believes a violation has occurred under the FMSH Act. Whenever the MSHA issues a citation or order, it also generally proposes a civil penalty, or fine, related to the alleged violation.

Pursuant to Section 1503(a) of the Dodd-Frank Wall Street Reform and Consumer Protection Act (the "Dodd-Frank Act"), issuers that are operators, or that have a subsidiary that is an operator, of a coal or other mine are required to disclose in their periodic reports filed with the Commission information regarding specified health and safety violations, orders and citations, related assessments and legal actions, and mining-related fatalities. The disclosures reflect Hudbay's U.S. mining operations only as the requirements of the Dodd-Frank Act do not apply to Hudbay's mines operated outside the U.S. During the fiscal year ended December 31, 2020, the Registrant's Rosemont Copper and Mason Projects did not receive any citations or orders from the MSHA alleging violations specified by the Dodd-Frank Act and there were no mining-related fatalities.

In addition, as required by the reporting requirements regarding mine safety included in section 1503(a)(2) of the Dodd-Frank Act, for the year ended December 31, 2020, none of the mines operated by Hudbay received written notice from the MSHA of (a) a pattern of violations of mandatory health or safety standards that are of such nature as could have significantly and substantially contributed to the cause and effect of mine health or safety hazards under section 104(e) of the FMSH Act or (b) the potential to have such a pattern.

EX-99.5

Exhibit 99.5

Certification by the Chief Executive Officer Pursuant to

Section 302 of the Sarbanes-Oxley Act of 2002

I, Peter Kukielski, certify that:

1)I have reviewed this annual report on Form 40-F of Hudbay Minerals Inc.;

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 issuer as of, and for, the periods presented in this report;

4)The issuer'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 issuer 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 issuer, 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 issuer'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 issuer'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 issuer's internal control over financial reporting; and

5)The issuer's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the issuer's auditors and the audit committee of the issuer'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 issuer'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 issuer's internal control over financial reporting.

Date: March 29, 2021

/s/ Peter Kukielski                                          

Peter Kukielski

Chief Executive Officer

(Principal Executive Officer)

EX-99.6

Exhibit 99.6

Certification by the Chief Financial Officer Pursuant to

Section 302 of the Sarbanes-Oxley Act of 2002

I, Steve Douglas, certify that:

1)I have reviewed this annual report on Form 40-F of Hudbay Minerals Inc.;

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 issuer as of, and for, the periods presented in this report;

4)The issuer'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 issuer 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 issuer, 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 issuer'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 issuer'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 issuer's internal control over financial reporting; and

5)The issuer's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the issuer's auditors and the audit committee of the issuer'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 issuer'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 issuer's internal control over financial reporting.

Date: March 29, 2021

/s/ Steve Douglas                                            

Steve Douglas

Chief Financial Officer

(Principal Financial Officer)

EX-99.7

Exhibit 99.7

CERTIFICATION PURSUANT TO

18 U.S.C. §1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of Hudbay Minerals Inc. (the "Registrant") on Form 40-F for the period ended December 31, 2020, as filed with the Securities and Exchange Commission on the date hereof (the "Report"), I, Peter Kukielski, Chief Executive Officer of the Registrant, hereby certify, pursuant to 18 U.S.C. §1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to the best of my knowledge:

(1) the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) the information contained in this Report fairly presents, in all material respects, the financial condition and results of operations of the Registrant. 

March 29, 2021

/s/ Peter Kukielski                                          

Peter Kukielski

Chief Executive Officer

(Principal Executive Officer)

EX-99.8

Exhibit 99.8

CERTIFICATION PURSUANT TO

18 U.S.C. §1350,

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of Hudbay Minerals Inc. (the "Registrant") on Form 40-F for the period ended December 31, 2020, as filed with the Securities and Exchange Commission on the date hereof (the "Report"), I, Steve Douglas, Chief Financial Officer of the Registrant, hereby certify, pursuant to 18 U.S.C. §1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to the best of my knowledge:

(1) the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) the information contained in this Report fairly presents, in all material respects, the financial condition and results of operations of the Registrant.

March 29, 2021

/s/ Steve Douglas                                            

Steve Douglas

Chief Financial Officer

(Principal Financial Officer)

EX-99.9

Exhibit 99.9

CONSENT OF EXPERT

In connection with the Annual Report on Form 40-F of Hudbay Minerals Inc. ("Hudbay") for the year ended December 31, 2020, and any amendments thereto (the "Form 40-F"), I, Cashel Meagher, P.Geo., hereby consent to the use of my name in connection with the references to and summaries of scientific and technical information relating to Hudbay's mineral properties (collectively, the "Incorporated Information") and to the inclusion of the Incorporated Information in the Annual Information Form and Management's Discussion and Analysis of Results of Operations and Financial Condition for the year ended December 31, 2020, each filed as an exhibit to the Form 40-F and incorporated by reference therein.

I do also hereby consent to the use of my name and the incorporation by reference of the Incorporated Information in Registration Statement Nos. 333-170295, 333-197080 and 333-212750 on Form S-8 (including, in each case, any amendments thereto).

Yours very truly,

/s/ Cashel Meagher          

Cashel Meagher, P.Geo.

Dated: March 29, 2021

EX-99.10

Exhibit 99.10

CONSENT OF EXPERT

In connection with the Annual Report on Form 40-F of Hudbay Minerals Inc. ("Hudbay") for the year ended December 31, 2020, and any amendments thereto (the "Form 40-F"), I, Olivier Tavchandjian, P.Geo., hereby consent to the use of my name in connection with the references to and summaries of scientific and technical information relating to Hudbay's mineral properties (collectively, the "Incorporated Information") and to the inclusion of the Incorporated Information in the Annual Information Form and Management's Discussion and Analysis of Results of Operations and Financial Condition for the year ended December 31, 2020, each filed as an exhibit to the Form 40-F and incorporated by reference therein.

I do also hereby consent to the use of my name and the incorporation by reference of the Incorporated Information in Registration Statement Nos. 333-170295, 333-197080 and 333-212750 on Form S-8 (including, in each case, any amendments thereto).

Yours very truly,

/s/ Olivier Tavchandjian

Olivier Tavchandjian, P.Geo.

Dated: March 29, 2021

EX-99.11

Exhibit 99.11

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in Registration Statement Nos. 333-170295, 333-197080 and 333-212750 on Form S-8 and to the use of our reports dated February 18, 2021 relating to the financial statements of Hudbay Minerals Inc. (the “Company”) and the effectiveness of the Company’s internal control over financial reporting appearing in this Annual Report on Form 40-F for the year ended December 31, 2020.

/s/ Deloitte LLP

Chartered Professional Accountants
Licensed Public Accountants
Toronto, Canada
March 29, 2021

XML

Document and Entity Information	12 Months Ended
	Dec. 31, 2020 shares
Document and Entity Information [Abstract]
Entity Registrant Name	Hudbay Minerals Inc.
Entity Central Index Key	0001322422
Entity Current Reporting Status	Yes
Document Type	40-F
Document Period End Date	Dec. 31, 2020
Current Fiscal Year End Date	--12-31
Entity Interactive Data Current	Yes
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Entity Common Stock, Shares Outstanding	261,272,151
Amendment Flag	false
Entity Emerging Growth Company	false

XML

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Current
Cash	$ 439,135	$ 396,146
Trade and other receivables	141,199	105,994
Inventories	143,105	138,820
Prepaid expenses and other current assets	16,717	12,737
Other financial assets	3,073	2,049
Taxes receivable	12,446	7,289
Total Current assets	755,675	663,035
Receivables	18,568	19,264
Inventories	22,006	19,455
Other financial assets	15,669	11,287
Intangibles and other assets	21,173	10,411
Property, plant and equipment	3,731,655	3,662,559
Deferred tax assets	101,899	75,046
Total Assets	4,666,645	4,461,057
Current liabilities
Trade and other payables	233,147	192,404
Taxes payable	2,701	2,146
Other liabilities	51,971	49,411
Other financial liabilities	24,713	28,076
Lease liabilities	33,473	32,781
Deferred revenue	102,782	86,933
Total Current liabilities	448,787	391,751
Other financial liabilities	194,378	39,784
Lease liabilities	30,041	49,166
Long-term debt	1,135,675	985,255
Deferred revenue	443,902	476,823
Provisions	331,799	280,850
Pension obligations	23,316	29,599
Other employee benefits	129,508	116,778
Deferred tax liabilities	229,433	242,928
Total liabilities	2,966,839	2,612,934
Equity
Share capital	1,777,340	1,777,340
Reserves	(24,200)	(24,250)
Retained earnings	(53,334)	95,033
Total equity	1,699,806	1,848,123
Total liabilities and equity	$ 4,666,645	$ 4,461,057

XML

Consolidated Income Statements - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Income Statement
Revenue	$ 1,092,418	$ 1,237,439
Cost of sales
Mine operating costs	691,591	741,342
Depreciation and amortization	361,827	344,555
Cost of Sales	1,053,418	1,085,897
Gross profit	39,000	151,542
Selling and administrative expenses	41,408	36,170
Exploration and evaluation expenses	17,196	30,774
Other operating expenses	17,583	51,116
Impairment loss	0	322,249
Results from operating activities	(37,187)	(288,767)
Net interest expense on long term debt	82,712	68,375
Accretion on streaming arrangements	56,670	69,772
Change in fair value of financial instruments	(29,370)	8,247
Other net finance costs	31,890	17,602
Net finance expense	141,902	163,996
Loss before tax	(179,089)	(452,763)
Tax recovery	(34,505)	(108,953)
Loss for the year	$ (144,584)	$ (343,810)
Loss per share
Basic and diluted (in dollars per share)	$ (0.55)	$ (1.32)
Weighted average number of common shares outstanding:
Basic and diluted (in shares)	261,272,151	261,272,151

XML

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Cash generated from operating activities:
Loss for the year	$ (144,584)	$ (343,810)
Tax recovery	(34,505)	(108,953)
Items not affecting cash:
Depreciation and amortization	363,603	346,634
Share-based compensation	15,008	2,714
Net interest expense on long term debt	82,712	68,375
Accretion on streaming arrangements	56,670	69,772
Change in fair value of financial instruments	(29,370)	8,247
Other net finance costs	31,890	17,602
Inventory write-down	32	504
Amortization of deferred revenue and variable consideration	(73,931)	(76,103)
Pension and other employee benefit payments, net of accruals	3,043	2,148
Write-down of UCM Receivable		25,978
Asset impairment		322,249
Decommissioning and restoration payments	(18,737)	(4,136)
Other	2,673	2,916
Taxes paid	(12,641)	(26,853)
Operating cash flow before change in non-cash working capital	241,863	307,284
Change in non-cash working capital	(2,383)	3,572
Net cash flows from operating activities	239,480	310,856
Cash used in investing activities:
Acquisition of property, plant and equipment	(361,185)	(259,202)
Acquisition of subsidiary, net of cash acquired		(44,688)
Change in restricted cash		3,401
Interest received	2,167	8,119
Net cash flows from investing activities	(359,018)	(292,370)
Cash generated from/(used) in financing activities:
Issuance of senior unsecured notes, net of transaction costs	591,824
Principal repayments	(400,000)
Premium paid on redemption of notes	(7,252)
Interest paid on long-term debt	(81,517)	(74,750)
Financing costs	(16,204)	(26,149)
Lease payments	(35,980)	(32,952)
Gold prepayment proceeds	115,005
Dividends paid	(3,783)	(3,927)
Net cash flows from financing activities	162,093	(137,778)
Effect of movement in exchange rates on cash and cash equivalents	434	(59)
Net increase (decrease) in cash	42,989	(119,351)
Cash, beginning of the year	396,146	515,497
Cash, end of the year	$ 439,135	$ 396,146

XML

Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Statement of Income and Comprehensive Income
Loss for the year	$ (144,584)	$ (343,810)
Item that will be reclassified subsequently to profit or loss:
Net gain (loss) on translation of foreign currency balances	4,170	9,220
Total other comprehensive income that will be reclassified to profit or loss, net of tax	4,170	9,220
Items that will not be reclassified subsequently to profit or loss:
Gold prepayment revaluation	(1,885)	0
Tax effect	506	0
Remeasurement - actuarial loss	(2,598)	(20,072)
Tax effect	(1,265)	1,878
Total other comprehensive income that will not be reclassified to profit or loss, net of tax	(5,242)	(18,194)
Transferred to income statement:
Other comprehensive loss net of tax, for the year	(1,072)	(8,974)
Total comprehensive loss for the year	$ (145,656)	$ (352,784)

XML

Consolidated Statements of Changes in Equity - USD ($) $ in Thousands	Share capital [Member]	Other capital reserves [Member]	Foreign currency translation reserve [Member]	Remeasurement reserve [Member]	Retained earnings [Member]	Total
Beginning Balance at Dec. 31, 2018	$ 1,777,340	$ 28,837	$ (11,819)	$ (58,272)	$ 442,770	$ 2,178,856
Statements [Line Items]
Profit (Loss)					(343,810)	(343,810)
Other comprehensive income (loss)			9,220	(18,194)		(8,974)
Total comprehensive income (loss)			9,220	(18,194)	(343,810)	(352,784)
Dilution of Partner's interest in Rosemont		25,978				25,978
Contributions by and distributions to owners:
Dividends					(3,927)	(3,927)
Total contributions by and distributions to owners					(3,927)	(3,927)
Ending Balance at Dec. 31, 2019	1,777,340	54,815	(2,599)	(76,466)	95,033	1,848,123
Statements [Line Items]
Profit (Loss)					(144,584)	(144,584)
Other comprehensive income (loss)			4,170	(5,242)		(1,072)
Total comprehensive income (loss)			4,170	(5,242)	(144,584)	(145,656)
Contributions by and distributions to owners:
Dividends					(3,783)	(3,783)
Stock options		1,122				1,122
Total contributions by and distributions to owners		(1,122)			3,783	2,661
Ending Balance at Dec. 31, 2020	$ 1,777,340	$ 55,937	$ 1,571	$ (81,708)	$ (53,334)	$ 1,699,806

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Reporting entity

12 Months Ended

Dec. 31, 2020

Disclosure Of Corporate Information [Abstract]

Reporting entity [Text Block]

1.      Reporting entity

On January 1, 2017, Hudbay Minerals Inc. amalgamated under the Canada Business Corporations Act with its subsidiaries Hudson Bay Mining and Smelting Co., Limited and Hudson Bay Exploration and Development Company Limited to form Hudbay Minerals Inc. ("HMI" or the "Company"). The address of the Company's principal executive office is 25 York Street, Suite 800, Toronto, Ontario. The consolidated financial statements of the Company for the year ended December 31, 2020 and 2019 represent the financial position and the financial performance of the Company and its subsidiaries (together referred to as "Hudbay").

Wholly owned subsidiaries as at December 31, 2020 and 2019 include HudBay Marketing & Sales Inc. ("HMS"), HudBay Peru Inc., HudBay Peru S.A.C. ("Hudbay Peru"), HudBay (BVI) Inc., Hudbay Arizona Inc, Rosemont Copper Company ("Rosemont") and Mason Resources (US) Inc. ("Mason").

Hudbay is an integrated mining company primarily producing copper concentrate (containing copper, gold and silver), molybdenum concentrate and zinc metal. With assets in North and South America, Hudbay is focused on the discovery, production and marketing of base and precious metals. Directly and through its subsidiaries, Hudbay owns three polymetallic mines, four ore concentrators and a zinc production facility in northern Manitoba and Saskatchewan (Canada) and Cusco (Peru) and copper projects in Arizona and Nevada (United States). Hudbay also has equity investments in a number of junior exploration companies. The Company is governed by the Canada Business Corporations Act and its shares are listed under the symbol "HBM" on the Toronto Stock Exchange, New York Stock Exchange and Bolsa de Valores de Lima.

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Basis of preparation

12 Months Ended

Dec. 31, 2020

Basis Of Preparation [Abstract]

Basis of preparation [Text Block]

2. Basis of preparation

   (a)   Statement of compliance:

These consolidated financial statements have been prepared in accordance with International Financial Reporting Standards ("IFRS") as issued by the International Accounting Standards Board ("IASB") effective for the year ended December 31, 2020.

The Board of Directors approved these consolidated financial statements on February 18, 2021.

   (b)   Functional and presentation currency:

Hudbay's consolidated financial statements are presented in US dollars, which is the Company's and all material subsidiaries' functional currency, except the Company's Manitoba business unit, which has a functional currency of Canadian dollars. All values are rounded to the nearest thousand ($000) except where otherwise indicated.

   (c)   Basis of measurement:

The consolidated financial statements have been prepared on the historical cost basis except for the following items in the consolidated balance sheets:

-        Derivatives, embedded derivatives, other financial instruments, and financial assets measured at fair value through profit or loss ("FVTPL");

-        Liabilities for cash-settled share-based compensation arrangements are measured at fair value; and,

-       A defined benefit liability is recognized as the net total of the plan assets, unrecognized past service costs and unrecognized actuarial losses, less unrecognized actuarial gains and the present value of the defined benefit obligation.

(d)  COVID-19 estimation uncertainty:

At the end of 2019, a novel strain of coronavirus ("COVID-19") was reported in China. The COVID-19 outbreak has developed rapidly in 2020, with a significant number of infections around the world, including regions Hudbay operates in. On March 11, 2020, the World Health Organization declared the COVID-19 outbreak a global pandemic. Since then, containment measures have resulted in decreased economic activity, which has adversely affected the broader global economy.

The resulting impacts on global commerce have been and continue to be far-reaching. To date there has been volatility in stock markets, commodities and foreign exchange markets, restrictions on the conduct of business in many jurisdictions and the global movement of people and some goods have become restricted.

The Company has evaluated the potential impacts arising from COVID-19 on all aspects of its business, with particular attention to indicators of impairment / reversal of impairment of non-financial assets, inventory and accounts receivable valuations, impacts on pension and other employee benefit discount rates, and deferred tax provisions.

In all these areas, for the year ended December 31, 2020, there was no significant financial impact on the Company.

(e)   Use of judgements and estimates:

The preparation of the consolidated financial statements in conformity with IFRS requires Hudbay to make judgements, estimates and assumptions that affect the application of accounting policies, reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements, and reported amounts of revenue and expenses during the reporting period. Actual results may differ from these estimates.

Hudbay reviews these estimates and underlying assumptions on an ongoing basis, based on experience and other factors, including expectations of future events that the Company believes to be reasonable under the circumstances. Revisions to accounting estimates are recognized prospectively in the period in which the estimates are revised and in any future periods affected.

The following are critical and significant judgements and estimates impacting the consolidated financial statements:

-     Indicators and testing of impairment (reversal of impairment) of non-financial assets (notes 3i, 3j and 12) - There are a number of potential indicators that could trigger non-financial asset impairment or reversal of impairment. These indicators may require critical judgements to determine the extent that external and/or internal environmental business changes may impact Hudbay's overall assessment of the recoverability of non-financial assets. Such business changes include changes to the life of mine ("LOM") plan, changes to budget, and changes to long-term commodity prices. If an impairment or impairment reversal indicator is noted then there are also critical estimates involved in the determination of the recoverable amount of cash generating units ("CGU"). Recoverable amounts are calculated using discounted after-tax cash flows based on cash flow projections and assumptions in Hudbay's most recent LOM plans. LOM plans are based on optimized mine and processing plans and the assessment of capital expenditure requirements of a mine site. LOM plans incorporate management's best estimates of key assumptions which include future commodity prices, the value of mineral resources not included in the Constancia and Arizona LOM plan, production based on current estimates of recoverable reserves, discount rates, future operating and capital costs and future foreign exchange rates. Most critical to the value of the recoverable amount are the assumptions of future commodity prices and the value of mineral resources not included in the Constancia and Arizona LOM plan. Expected future cash flows used to determine the recoverable amount during impairment testing are inherently uncertain and could materially change over time. Should management's estimate of the future not reflect actual events, impairments may be identified, which could have a material effect on Hudbay's consolidated financial statements. Although it is reasonably possible for a change in key assumptions to occur, the possible effects of a change in any single assumption may not fairly reflect the impact of CGU's fair value as the assumptions are inextricably linked.

-     IFRS 15 - Revenue- stream transactions (note 18) - Hudbay has determined that the precious metals stream contracts are subject to variable consideration and contain a significant financing component. As such, Hudbay recognizes a financing charge at each reporting period and grosses up the deferred revenue balance to recognize the significant financing element that is part of these contracts. Significant judgement was required in determining if the stream transactions were to be accounted for as deferred revenue. Management has determined that these stream transactions are not derivatives since obligations will be satisfied through the delivery of non-financial items (i.e., gold and silver credits) rather than cash or financial assets. It is management's intention to settle the obligations under the stream transactions through its own production and if this is not possible, this would lead to the stream transactions becoming a financial instrument since a cash settlement payment may be required. This would cause a change to the accounting treatment, resulting in the revaluation of the fair value of the agreement through the income statement on a recurring basis.

-    Mineral reserves and resources (notes 3i, 3m, 3o and 18) - Hudbay estimates mineral reserves and resources to determine future recoverable mine production based on assessment of geological, engineering and metallurgical analyses, estimates of future production costs, capital costs and reclamation costs, as well as long term commodity prices and foreign exchange rates. There are numerous uncertainties inherent in estimating mineral reserves and resources, including many factors beyond Hudbay's control. The estimates are based on information compiled by appropriately qualified persons relating to the geological data on the size, depth and shape of the ore body and interpreting this data requires complex geological judgements. Changes in assumptions, including economic assumptions such as metals prices and market conditions, could have a material effect on the financial position and results of operations.

Changes in the mineral reserve or resource estimates may affect:

-  the carrying value of exploration and evaluation assets, capital works in progress, mining properties and plant and equipment;

-  depreciation expense for assets depreciated either on a unit-of-production basis or on a straight line basis where useful lives are restricted by the life of the related mine plan;

-  the provision for decommissioning, restoration and similar liabilities;

-  the carrying value of deferred tax assets; and,

-  amortization of deferred revenue.

-     Property plant and equipment (notes 3i and 12) - The carrying amounts of property, plant and equipment and exploration and evaluation assets on Hudbay's consolidated balance sheets are significant and reflect multiple estimates and applications of judgement. Management exercises judgement in determining whether the costs related to exploration and evaluation are eligible for capitalization and whether they are likely to be recoverable by future exploration, which may be based on assumptions about future events and circumstances. Judgement and estimates are used when determining whether exploration and evaluation assets should be transferred to capital works in progress within property, plant and equipment. For mines in the production stage, management applies judgement to determine development costs to be capitalized based on the extent they are incurred in order to access reserves mineable over more than one year. For depreciable property, plant and equipment assets, management makes estimates to determine depreciation. For assets depreciated using the straight line method, residual value and useful lives of the assets or components are estimated. A significant estimate is required to determine the total production basis for units-of-production depreciation. The most currently available reserve and resource report is utilized in determining the basis which has material impacts on the amount of depreciation recorded through inventories and the consolidated income statements. There are numerous uncertainties inherent in estimating mineral reserves, and assumptions that were valid at the reporting date may change when new information becomes available. The actual volume of ore extracted and any changes in these assumptions could affect prospective depreciation rates and carrying values. In determining whether stripping costs incurred during the production phase of a mining property relate to mineral reserves and mineral resources that will be mined in a future period and therefore should be capitalized, Hudbay makes estimates of the proportion of stripping activity which relates to extracting current ore and the proportion which relates to obtaining access to ore reserves which will be mined in the future.

-     Acquisition method accounting (notes 3a and 5) - Judgement was required to determine if the acquisition of UCM's 7.95% interest in the Rosemont project represented a business combination, or an asset purchase. Since it was concluded that the acquisition represented the purchase of assets, there was no goodwill generated on the transaction and acquisition costs were capitalized to the assets purchased rather than expensed.

-     Tax provisions (notes 3o and 22) - Management makes estimates in determining the measurement and recognition of deferred tax assets and liabilities recorded on the consolidated balance sheets. The measurement of deferred tax assets and deferred tax liabilities is based on tax rates that are expected to apply in the period that the asset is realized or liability is settled based on tax rates that have been enacted or substantively enacted by the end of the reporting period. Deferred tax assets, including those arising from unutilized tax losses, require management to assess the likelihood of taxable income in the future periods in order to utilize recognized deferred tax assets. Estimates of future taxable income are based on forecasted cash flows from operations and the application of existing tax laws in each jurisdiction. To the extent that future cash flows and taxable income differ significantly from estimates, the ability to realize the net deferred tax assets recorded at the balance sheet date could be affected. At the end of each reporting period, management reassesses the period that the assets are expected to be realized or liabilities are settled and the likelihood of taxable income in future periods in order to support and adjust the deferred tax assets and deferred tax liabilities recognized on the consolidated balance sheets.

-    Assaying utilized to determine revenue and recoverability of inventories (notes 3c and 3f) - Assaying of contained metal is a key estimate in determining the amount of revenues recorded in the consolidated income statements.  The estimate is finalized after final surveying is completed, which may extend to six months in certain transactions. Since assays are utilized to determine the value of recorded revenues, significant differences in given assays may result in a material misstatement of revenues on the consolidated income statements. Assay survey results are also a factor utilized to determine if inventories on hand have a net realizable value that exceeds cost. Material differences in assay results may lead to misstatements of inventory balances in the consolidated balance sheets.

-    Decommissioning and restoration obligations (notes 3m and 19) - Significant judgement and estimates are utilized in the determination of the decommissioning and restoration provisions in the consolidated balance sheets. Judgement is involved in determining the timing and extent of cash outflows required to satisfy constructive obligations based on the timing of site closures in the LOM plans, expected unit costs to determine cash obligations to remediate disturbances and regulatory and constructive requirements to determine the extent of the remediation required. The timing of cash outflows and discount rates associated with discounting the provision are also key estimates. Changes in these estimates may result in a change in classification of the provision between non-current and current as well as material differences in the total provision recorded in the consolidated balance sheets.

-      Pension and other employee benefit (notes 3l, 20 and 21) - Hudbay's post retirement obligations relate mainly to ongoing health care benefits plans. Hudbay estimates obligations related to the pension and other employee benefits plans using actuarial determinations that incorporate assumptions using management's best estimates of factors including plan performance, salary escalation, retirement dates of employees and drug cost escalation rates. Due to the complexity of the valuation, the underlying assumptions and its long term nature, the defined benefit obligation is highly sensitive to changes in these assumptions. Management reviews all assumptions at each reporting date. In determining the appropriate discount rate, Hudbay considers the interest rates on corporate bonds in the respective currency with at least an AA rating, with extrapolated maturities corresponding to the expected duration of the defined benefit obligation. The mortality rate is based on publicly available mortality tables for the specific country, and Hudbay bases future salary increases and pension increases on expected future inflation rates for the respective country.

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Significant accounting policies

12 Months Ended

Dec. 31, 2020

Significant Accounting Policies [Abstract]

Significant accounting policies [Text Block]

3. Significant accounting policies

The accounting policies set out below have been applied consistently to all periods presented in these consolidated financial statements and by all Hudbay's entities.

a)    Basis of consolidation:

Intercompany balances and transactions are eliminated upon consolidation. When a Hudbay entity transacts with an associate or jointly controlled entity of the Company, unrealized profits and losses are eliminated to the extent of Hudbay's interest in the relevant associate or joint venture. The accounting policies of Hudbay's entities are changed when necessary to align them with the policies adopted by the Company.

Subsidiaries

A subsidiary is an entity controlled by Hudbay. The financial statements of subsidiaries are included in the consolidated financial statements from the date that control commences until the date that control ceases.

Business combinations and goodwill

When Hudbay makes an acquisition, it first determines whether the assets acquired and liabilities assumed constitute a business, in which case the acquisition requires accounting as a business combination. Management applies judgement in determining whether the acquiree is capable of being conducted and managed for the purpose of providing a return, considering the inputs of the acquiree and processes applied to those inputs that have the ability to create outputs.

Hudbay applies the acquisition method of accounting to business combinations, whereby the goodwill is measured at the acquisition date as the fair value of the consideration transferred including the recognized amount of any non-controlling interests in the acquiree. When the excess is negative, a bargain purchase gain is recognized immediately in the consolidated income statements. The assessment of fair values on acquisition includes those mineral reserves and resources that are able to be reliably measured. In determining these fair values, management must also apply judgement in areas including future cash flows, metal prices, exchange rates and appropriate discount rates. Changes in such estimates and assumptions could result in significant differences in the amount of goodwill recognized.

The consideration transferred is the aggregate of the fair values, at the date of the acquisition, of the sum of the assets transferred, the liabilities incurred or assumed, and the equity instruments issued by the acquirer in exchange for control of the acquiree. Acquisition-related costs are recognized in the consolidated income statements as incurred, unless they relate to issuance of debt or equity securities.

Where applicable, the consideration transferred includes any asset or liability resulting from a contingent consideration arrangement and measured at its acquisition date fair value. Subsequent changes in such fair values are adjusted against the cost of acquisition where they qualify as measurement period adjustments. All other subsequent changes in the fair value of contingent consideration classified as an asset or liability are accounted for in accordance with relevant IFRS. Changes in the fair value of contingent consideration classified as equity are not recognized.

Where a business combination is achieved in stages, the Company's previously held interests in the acquired entity are remeasured to fair value at the acquisition date, which is the date Hudbay attains control, and any resulting gain or loss is recognized in the consolidated income statements. Amounts previously recognized in other comprehensive income ("OCI") related to interests in the acquiree prior to the acquisition date are reclassified to the consolidated income statements, where such treatment would be appropriate if that interest were disposed of.

After initial recognition, goodwill is measured at cost less any accumulated impairment losses. For the purpose of impairment testing, goodwill acquired in a business combination is, from the acquisition date, allocated to each of Hudbay's CGUs that are expected to benefit from the synergies of the combination, irrespective of whether other assets or liabilities of the acquiree are assigned to those units. Goodwill is allocated to the lowest level at which it is monitored for internal management purposes and is not larger than an operating segment before aggregation. Where goodwill forms part of a CGU and part of the operation within that unit is disposed of, the goodwill associated with the disposed operation is included in the determination of any gain or loss on disposal.

Goodwill is not amortized and is tested for impairment annually and whenever there is an indication of impairment. If any such indication exists, the recoverable amount of the CGU is estimated in order to determine the extent of the impairment, if any. The recoverable amount is determined as the higher of fair value less direct costs to sell and the CGU's value in use. An impairment loss in respect of goodwill is not reversed.

Fair value for mineral interests and related goodwill is generally determined as the present value of the estimated future cash flows expected to arise from the continued use of the asset, including any expansion prospects, and its eventual disposal, using assumptions that an independent market participant may take into account.

Value in use is determined as the present value of the estimated future cash flows expected to arise from the continued use of the asset in its present form and its eventual disposal. Value in use is determined by applying assumptions specific to Hudbay's continued use and cannot take into account future development.

The weighted average cost of capital of Hudbay or comparable market participants is used as a starting point for determining the discount rates, with appropriate adjustments for the risk profile of the countries in which the individual CGUs operate and the specific risks related to the development of the project.

Where the asset does not generate cash flows that are independent of other assets, Hudbay estimates the recoverable amount of the CGU to which the asset belongs. If the carrying amount of an asset or CGU exceeds its recoverable amount, the carrying amount of the asset or CGU is reduced to its recoverable amount. An impairment loss is recognized as an expense in the consolidated income statements.

b)   Translation of foreign currencies:

Management determines the functional currency of each Hudbay entity as the currency of the primary economic environment in which the entity operates.

Foreign currency transactions

Transactions in foreign currencies are translated to the respective functional currencies of Hudbay's entities at exchange rates in effect at the transaction dates.

At the end of each reporting period, monetary assets and liabilities denominated in foreign currencies are translated to the functional currency using the closing exchange rate. Non-monetary assets and liabilities measured at fair value are translated using the exchange rates at the date when fair value was determined. Non-monetary assets and liabilities measured at historical cost in a foreign currency are translated using exchange rates that were in effect at the transaction dates. The same translations are applied when an entity prepares its financial statements from books and records maintained in a currency other than its functional currency, except revenue and expenses may be translated at monthly average exchange rates that approximate those in effect at the transaction dates.

Foreign currency gains and losses arising on period-end revaluations are recognized in the consolidated income statements, except for a financial liability designated as a hedge of a net investment in a foreign operation, or qualifying cash flow hedges, which are recognized in OCI.

Foreign operations

For the purpose of the consolidated financial statements, assets and liabilities of Hudbay's entities that have functional currencies other than the US dollar are translated to US dollars at the reporting date using the closing exchange rate. Revenue and expenses are translated at monthly average exchange rates that approximate those in effect at the transaction dates. Differences arising from these foreign currency translations are recognized in OCI and presented within equity in the foreign currency translation reserve. When a foreign operation is disposed, the relevant exchange differences accumulated in the foreign currency translation reserve are transferred to the consolidated income statements as part of the profit or loss on disposal. On the partial disposal of a subsidiary that includes a foreign operation, the relevant proportion of such amount is reattributed to non-controlling interests. On disposal of a partial investment in an associate or joint venture that includes a foreign operation while retaining significant influence or joint control, the relevant proportion is reclassified to profit or loss.

Net investment in a foreign operation

Foreign currency gains and losses arising on translation of a monetary item receivable from or payable to a foreign operation for which settlement is neither planned nor likely to occur in the foreseeable future are considered to form part of a net investment in the foreign operation. Such gains and losses are recognized in OCI and presented within equity in the foreign currency translation reserve.

c) Revenue recognition:

Revenue from the sale of goods is measured at the fair value of the consideration received or receivable, net of treatment and refining charges and pre-production revenue. Revenue from the sale of by-products is included within revenue.

Revenue is recognized when control of the goods sold has been transferred to the buyer. Control is deemed to have passed to the customer when significant risk and reward of the product has passed to the buyer, Hudbay has a present right to payment and physical possession of the product has been transferred to the buyer. Sale of concentrate and finished zinc frequently occur under the following terms, and management has assessed these terms in order to determine timing of transfer of control.

Incoterms used by Hudbay	Revenue recognized when goods:
Cost, Insurance and Freight (CIF)	Are loaded on board the vessel
Free on Board (FOB)	Are loaded on board the vessel
Delivered at place (DAP)	Arrive at the named place of destination
Delivered at terminal (DAT)	Arrive at the named place of destination
Free Carrier (FCA)	Arrive at the named place of delivery

Sales of concentrate and certain other products are provisionally priced. For these contracts, sales prices are subject to final adjustment at the end of a future period after shipment, based on quoted market prices during the quotational period specified in the contract. Revenue is recognized when the above criteria are achieved, using weight and assay results and forward market prices to estimate the fair value of the total consideration receivable. Therefore, revenue is initially recorded based on an initial provisional invoice. Subsequently, at each reporting date, until the provisionally priced sale is finalized, sales receivables are marked to market, with adjustments (both gains and losses) recorded within revenue separately as "Pricing and volume adjustments" in the notes to the consolidated financial statements and in trade and other receivables on the consolidated balance sheets. As per IFRS 15 Revenue, variability in price is deemed to be fair value movements on provisionally priced receivables under the scope of IFRS 9 Financial Instruments; variability in quantities is deemed to be variable consideration. The variable consideration from weights and assay changes to quantities has been assessed to be insignificant to warrant precluding revenue being recorded as a result of possible future sales reversals. An annual analysis of the accuracy of our weights and assays is completed, and if the accuracy rate falls below a certain threshold, management then evaluates whether revenue from future sales should be constrained as a result of it being highly probable that there would be a significant revenue reversal in the future.

Hudbay only includes in the transaction price an amount which is not highly likely to be subject to significant subsequent revenue reversal. Within sales contracts with customers, separate performance obligations may arise pertaining to the shipping of goods sold. If applicable, costs and the transaction price are allocated on a relative standalone selling basis to any separate performance obligations and are recognized over the period of time the goods sold are shipped, on a gross basis.

Hudbay recognizes deferred revenue in the event it receives payments from customers before a sale meets criteria for revenue recognition. There is a significant financing component associated with the Company's precious metal streaming arrangements since funds were received in advance of the delivery of concentrate. When a significant financing component is recognized, finance expense will be higher and revenues will be higher as the larger deferred revenue balance is amortized to revenues. A market-based discount rate is utilized at the inception of each of the respective stream agreements to determine a discount rate for computing the interest charges for the significant financing component of the deferred revenue balance. As product is delivered, the deferred revenue amount including accreted interest will be drawn down. The draw down rate requires the use of proven and probable reserves and certain resources in the calculation that are beyond proven and probable reserves which management is reasonably confident will be transferable to reserves. Key estimates used in determining the significant financing component include the discount rate and the reserve and resources assumed for conversion.

d)   Cost of sales:

Cost of sales consists of those costs previously included in the measurement of inventory sold during the period, as well as certain costs not included in the measurement of inventory, such as the cost of warehousing and distribution to customers, provisional pricing adjustments related to purchased concentrates, profit sharing, royalty payments, share-based compensation expense and other indirect expenses related to producing operations.

e)  Cash and cash equivalents:

Cash and cash equivalents include cash, demand deposits and short-term, highly liquid investments that are readily convertible to known amounts of cash and are subject to an insignificant risk of changes in value. Cash equivalents have maturities of three months or less at the date of acquisition. Interest earned is included in finance income on the consolidated income statements and in investing activities on the consolidated statements of cash flows.

Amounts that are restricted from being used for at least twelve months after the reporting date are classified as non-current assets and presented in restricted cash on the consolidated balance sheets. Changes in restricted cash balances are classified as investing activities on the consolidated statements of cash flows.

f)  Inventories:

Inventories consist of stockpiles, in-process inventory (concentrates and metals), metal products and supplies. Concentrates, metals and all other saleable products are valued at the lower of cost and estimated net realizable value. Net realizable value represents the estimated selling price for inventories less all estimated costs of completion and costs necessary to make the sale. Where the net realizable value is less than cost, the difference is charged to the consolidated income statements as an impairment charge in cost of sales. Costs associated with stripping activities in an open pit mine are capitalized to inventory and recorded through cost of sales unless the stripping activity can be shown to improve access to further quantities of ore that will be mined in future periods, in which case, the stripping costs are capitalized to property, plant and equipment.

Cost of production of concentrate inventory is determined on a weighted average cost basis and the cost of production of finished metal inventory is determined using the first in first out basis. The cost of production includes direct costs associated with conversion of production inventory based on normal production capacity: material, labour, contractor expenses, purchased concentrates, and an attributable portion of production overheads and depreciation of all property, plant and equipment involved with the mining and production process. Hudbay measures in-process inventories based on assays of material received at metallurgical plants and estimates of recoveries in the production processes. Due to significant uncertainty associated with volume and metal content, immaterial costs are not allocated to routine operating levels of stockpiled ore. Estimates and judgements are required to assess the nature of any significant changes to levels of ore stockpiles and determining whether allocation of costs is required.

Supplies are valued at the lower of average cost and net realizable value.

g)  Intangible assets:

Computer software is measured at cost less accumulated amortization and accumulated impairment losses. Costs include all directly attributable costs necessary to create, produce and prepare the asset to be capable of operating it in the manner intended by management.

Amortization methods, useful lives, and residual values if any, are reviewed at each year end and adjusted prospectively, if required. When an intangible asset is disposed of, or when no further economic benefits are expected, the asset is derecognized, and any resulting gain or loss is recorded in the consolidated income statements.

Currently, the Company's intangible assets relate primarily to enterprise resource planning ("ERP") information systems, which are amortized over their estimated useful lives.

h)   Exploration and evaluation expenditures:

Exploration and evaluation activity begins when Hudbay obtains legal rights to explore a specific area and involves the search for mineral reserves, the determination of technical feasibility, and the assessment of commercial viability of an identified resource. Expenditures incurred in the exploration and evaluation phase include the cost of acquiring interests in mineral rights, licenses and properties and the costs of Hudbay's exploration activities, such as researching and analyzing existing exploration data, gathering data through geological studies, exploratory drilling, trenching, sampling, and certain feasibility studies.

Hudbay expenses the cost of its exploration and evaluation activities and capitalizes the cost of acquiring interests in mineral rights, licenses and properties in business combinations, asset acquisitions or option agreements. Amounts capitalized are recognized as exploration and evaluation assets and presented in property, plant and equipment. Exploration and evaluation assets acquired as a result of an asset acquisition or option agreement are initially recognized at cost, and those acquired in a business combination are recognized at fair value on the acquisition date. They are subsequently carried at cost less accumulated impairment. No depreciation is charged during the exploration and evaluation phase. Hudbay expenses the cost of subsequent exploration and evaluation activity related to acquired exploration and evaluation assets. Cash flows associated with acquiring exploration and evaluation assets are classified as investing activities in the consolidated statements of cash flows; those associated with exploration and evaluation expenses are classified as operating activities.

Judgement is required in determining whether the respective costs are eligible for capitalization where applicable, and whether they are likely to be recoverable, which may be based on assumptions about future events and circumstances. Estimates and assumptions made may change if new information becomes available.

Hudbay monitors exploration and evaluation assets for factors that may indicate their carrying amounts are not recoverable. If such indicators are identified, the Company tests the exploration and evaluation assets or their CGUs, as applicable, for impairment. Hudbay also tests for impairment when assets reach the end of the exploration and evaluation phase.

Exploration and evaluation assets are transferred to capital works in progress within property, plant and equipment once the Company determines that probable future economic benefits will be generated as a result of the expenditures. Hudbay's determination of probable future economic benefit is based on management's evaluation of the technical feasibility and commercial viability of the geological properties of a given ore body based on information obtained through evaluation activities, including metallurgical testing, resource and reserve estimates and the economic assessment of whether the ore body can be mined economically. Tools that may be used to determine this include a preliminary feasibility study, confidence in converting resources into reserves and the probability that the property could be developed into a mine site. At that time, the property is considered to enter the development phase, and subsequent evaluation costs are capitalized.

(i) Property, plant and equipment:

Hudbay measures items of property, plant and equipment at cost less accumulated depreciation and any accumulated impairment losses.

The initial cost of an item of property, plant and equipment includes its purchase price or construction costs, including import duties and non-refundable purchase taxes, any costs directly attributable to bringing the asset into operation, and for qualifying assets, borrowing costs. The initial cost of property, plant and equipment also includes the initial estimate of the cost of dismantling and removing the item and restoring the site on which it is located, the obligation which Hudbay incurs either when the item is acquired or as a consequence of having used the item during a particular period for purposes other than to produce inventories during that period.

Capitalization of costs ceases once an asset is in the location and condition necessary for it to be capable of operating in the manner intended by management. At this time, depreciation commences. For a new mine, this occurs upon commencement of commercial production. Up to and including December 31, 2020, any revenue earned in the process of preparing an asset to be capable of operating in the manner intended by management is included in the cost of the constructed asset. Any other incidental revenue earned prior to commencement of commercial production is recognized in the consolidated income statements.

Carrying amounts of property, plant and equipment, including right-of-use ("ROU") assets, are depreciated to their estimated residual value over the estimated useful lives of the assets or the estimated life of the related mine or plant, if shorter. Where components of an asset have different useful lives, depreciation is calculated on each separate component. Components may be physical or non-physical, including the cost of regular major inspections and overhauls required in order to continue operating an item of property, plant and equipment.

Certain items of property, plant and equipment are depreciated on a unit-of-production basis. The unit-of-production method is based on proven and probable tonnes of ore reserves. There are numerous uncertainties inherent in estimating ore reserves, and assumptions that were valid at the reporting date may change when new information becomes available. The actual volume of ore extracted and any changes in these assumptions could affect prospective depreciation rates and carrying values.

The carrying amount of an item of property, plant and equipment is derecognized on disposal or when no future economic benefits are expected from its use or disposal. Upon derecognition of an item of property, plant and equipment, the difference between its carrying value and net sales proceeds, if any, is presented as a gain or loss in other operating income or expense in the consolidated income statements.

i.        Capital works in progress:

Capital works in progress consist of items of property, plant and equipment in the course of construction or mineral properties in the course of development, including those transferred upon completion of the exploration and evaluation phase. On completion of construction or development, costs are transferred to plant and equipment and/or mining properties as appropriate. Capital works in progress are not depreciated.

ii.       Mining properties:

Mining properties consist of costs transferred from capital works in progress when a mining property reaches commercial production, costs of subsequent mine and exploration development, and acquired mining properties in the production stage.

Mining properties include costs directly attributable to bringing a mineral asset into the state where it is capable of operating in the manner intended by management and includes such costs as the cost of shafts, ramps, track haulage drifts, ancillary drifts, pumps, electrical substations, refuge stations, ventilation raises, permanent manways, and ore and waste pass raises. The determination of development costs to be capitalized during the production stage of a mine operation requires the use of judgements and estimates such as estimates of tonnes of waste to be removed over the life of the mining area and economically recoverable reserves extracted as a result.

A mining property is considered to be capable of operating in a manner intended by management when it commences commercial production based on pre-established criteria. Upon commencement of commercial production, a mining property is depreciated on a unit-of-production method. Unit-of-production depreciation rates are determined based on the related proven and probable mineral reserves and associated future development costs.

Subsequent mine development costs are capitalized to the extent they are incurred in order to access reserves mineable over more than one year. Ongoing maintenance and development expenditures are expensed as incurred and included in cost of sales in profit or loss. These include ore stope access drifts, footwall and hangingwall drifts in stopes, drawpoints, drill drifts, sublevels, slots, drill raises, stope manway access raises and definition diamond drilling.

iii.    Plant and equipment:

Plant and equipment consists of buildings and fixtures, surface and underground fixed and mobile equipment and assets under lease.

Plant and equipment are depreciated on either unit-of-production or straight-line basis based on factors including the production life of assets and mineable reserves. In general, mining assets are depreciated using a unit-of-production method; equipment is depreciated using the straight-line method, based on the shorter of its useful life and that of the related mine or facility; and plants are depreciated using the straight-line method, with useful lives limited by those of related mining assets.

iv.     Right-of-use lease assets:

At inception of a contract, Hudbay assesses whether a contract is, or contains, a lease. A contract is, or contains, a lease if the contract conveys the right to control the use of an identified asset for a period of time in exchange for consideration. The Company assesses the following criteria in the determination of whether a contract conveys the right to control the use of an identified asset:

•  The contract involves the use of an identified asset - this may be specified explicitly or implicitly, and should be physically distinct or represent substantially all of the capacity of a physically distinct asset. If the supplier has substantive substitution rights, then the asset is not identified;

•  Hudbay has the right to obtain substantially all of the economic benefits from use of the asset throughout the period of use; and

•  Hudbay has the right to direct the use of the asset by means of decision making rights that are most relevant to changing how and for what purpose the asset is used. In the case where decisions about the asset's purpose is predetermined, Hudbay is deemed to have the right to direct the use of the asset if either:

•  Hudbay has the right to operate the asset; or,

•  Hudbay designed the asset in a way that predetermines how and for what purpose it will be used.

The Company recognizes a ROU asset and lease liability at the lease commencement date. The initial measurement of the ROU asset is on a present value basis. This is based on the calculated lease liability plus any initial direct costs incurred, an estimate of removal or restoration costs, and any payments made prior to commencement of the lease less any lease incentives received.

The right of use asset is subsequently depreciated using the straight-line method from the commencement date to the earlier of the end of the useful life of the right-of-use asset or the end of the lease term. The estimated useful lives of the right-of-use assets are determined on the same basis as those of property and equipment. In addition, the right-of-use asset is periodically reduced by impairment losses, if any, and adjusted for certain remeasurements of the lease liability.

The lease liability is measured at the present value of the lease payments that are yet to be paid at the commencement date, discounted using the interest rate implicit in the lease or, if that rate cannot be easily determined, Hudbay's incremental borrowing rate. Generally, the Company uses its incremental borrowing rate as the discount rate for applicable leases.

Lease payments included in the measurement of the lease liability comprise fixed payments including in substance fixed payments and variable payments that depend on an index or rate, amounts expected to be payable under a residual value guarantee and the additional costs Hudbay reasonably expects to incur due to purchase options, extension options and termination options reasonably expected to be exercised.

The lease liability is measured at amortized cost using the effective interest method. It is remeasured when there is a change in the expected future cash flows of a leasing contract either due to a change in index or rate, or due to a change in terms of the contract. When the lease liability is remeasured in this way, a corresponding adjustment is made to the carrying amount of the right-of-use asset, or is recorded in profit or loss if the carrying amount of the right-of-use asset is zero.

Hudbay has elected not to separate non-lease components and account for the lease and non-lease components as a single lease component for lease contracts of all asset classes.

The Company has elected not to recognize ROU assets and lease liabilities for short-term leases of machinery that have a lease term of 12 months or less and leases of low-value assets. Hudbay recognizes the lease payments associated with these leases as an expense on a straight-line basis over the lease term.

Hudbay does not enter into transactions where the Company acts as a lessor.

The incremental borrowing rate used for new ROU leases is a key management judgement.

v.       Depreciation rates of major categories of assets:

•	Capital works in progress		- not depreciated
•	Mining properties		- unit-of- production
•	Mining asset		- unit-of- production
•	Plant and Equipment
	◦	Equipment	- straight-line over 1 to 20 years
	◦	Other plant assets	- straight-line over 1 to 20 years/unit-of-production
•	ROU Assets		- straight -line over 1 to 20 years

Hudbay reviews its depreciation methods, remaining useful lives and residual values at least annually and accounts for changes in estimates prospectively.

vi.   Commercial production:

Commercial production is the level of activities intended by management for a mine, or a mine and mill complex, to be capable of operating in the manner intended by management. Hudbay considers a range of factors when determining the level of activity that represents commercial production for a particular project, including a predetermined percentage of design capacity for the mine and mill; achievement of continuous production, ramp-ups, or other output; or specific factors such as recoveries, grades, or inventory build-ups. In a phased mining approach, management may consider achievement of specific milestones at each phase of completion. In a non-phased mining approach, management considers average actual metrics that are at least 60% of average design capacity or plan over a continuous period. Management assesses the operation's ability to sustain production over a period of approximately one to three months, depending on the complexity related to the stability of continuous operation. Commercial production is considered to have commenced, and depreciation expense is recognized, at the beginning of the month after criteria have been met.

vii.     Capitalized borrowing costs:

The Company capitalizes borrowing costs that are directly attributable to the acquisition, construction or production of qualifying assets, which are assets that necessarily take a substantial period of time, generally one year or more, to get ready for their intended use or sale. Capitalization of borrowing costs ceases once the qualifying assets commence commercial production or are otherwise ready for their intended use or sale.

Where funds are borrowed specifically to finance a project, the amount capitalized represents the actual borrowing costs incurred. Where the funds used to finance a project form part of general borrowings, the amount capitalized is calculated using a weighted average of interest rates applicable to relevant general borrowings of Hudbay during the period, to a maximum of actual borrowing costs incurred. Investment income earned by temporarily investing specific borrowings pending their expenditure on qualifying assets is deducted from the borrowing costs eligible for capitalization. Capitalization of interest is suspended during extended periods in which active development is interrupted.

All other borrowing costs are recognized in the consolidated income statements in the period in which they are incurred.

viii.     Capitalized stripping costs:

Costs associated with stripping activities in an open pit mine are capitalized to inventory and recorded through cost of sales unless the stripping activity can be shown to improve access to further quantities of ore that will be mined in future periods, in which case, the stripping costs are capitalized to property, plant and equipment. Capitalized stripping costs are included in "mining properties" within property, plant and equipment.

Capitalized stripping costs are depreciated using a units-of-production method over the expected reserves within a given phase of mine development.

(j)  Impairment of non—financial assets:

At the end of each reporting period, Hudbay reviews the carrying amounts of property, plant and equipment, exploration and evaluation assets and intangible assets - computer software to determine whether there is any indication of impairment. If any such indication exists, the Company estimates the recoverable amount of the asset in order to determine the extent of the impairment loss, if any. Hudbay generally assesses impairment at the level of CGUs, which are the smallest identifiable groups of assets that generate cash inflows that are largely independent of cash inflows from other assets.

Hudbay's CGUs consist of Manitoba, Peru, Arizona and greenfield exploration and evaluation assets.

The Company allocates near mine exploration and evaluation assets to CGUs based on their operating segment, geographic location and management's intended use for the property. Near mine exploration and evaluation assets are allocated to CGUs separate from those containing producing or development-phase assets, except where such exploration and evaluation assets have the potential to significantly affect the future production of producing or development-phase assets.

Goodwill, if recorded, is tested for impairment annually and whenever there is an indication that the asset may be impaired.

Where an indicator of impairment exists, a formal estimate of the recoverable amount of the asset or CGU is made. The recoverable amount is the higher of the fair value less costs of disposal and value in use:

- Fair value less costs of disposal is the amount obtainable from the sale of the asset or CGU in an arm's length transaction between knowledgeable, willing parties, less costs of disposal. Fair value for mineral assets is often determined as the present value of the estimated future cash flows expected to arise from the continued use of the asset, including any expansion prospects, and its eventual disposal, using assumptions that an independent market participant may take into account. These cash flows are discounted by an appropriate discount rate that reflects current market assessments of the time value of money and the risks specific to the asset to arrive at a net present value of the asset.

-     Value in use is determined as the present value of the estimated future cash flows expected to arise from the continued use of the asset or CGU in its present form and its eventual disposal, discounted using a pre-tax rate that reflects current market assessments of the time value of money and risks specific to the asset for which estimates of future cash flows have not been adjusted. Value in use calculations apply assumptions specific to the Company's continued use and cannot take into account future development. These assumptions are different to those used in calculating fair value, and consequently the value in use calculation is likely to give a different result to a fair value calculation.

Hudbay estimates future cash flows based on estimated future recoverable mine production, expected sales prices (considering current and historical commodity prices, price trends and related factors), production levels and cash costs of production, all based on detailed engineering LOM plans. Future recoverable mine production is determined from reserves and resources after taking into account estimated dilution and recoveries during mining, and estimated losses during ore processing and treatment. Estimates of recoverable production from measured, indicated and inferred mineral resources not included in the LOM plan are assessed for economic recoverability and may also be included in the valuation of fair value less costs of disposal. Gains from the expected disposal of assets are not included in estimated future cash flows. Assumptions underlying future cash flow estimates are subject to risks and uncertainties. Changes in estimates may affect the expected recoverability of the Company's investments in mining properties.

If the carrying amount of an asset or CGU exceeds its recoverable amount, the carrying amount is reduced to the recoverable amount, and an impairment loss is recognized in the consolidated income statements in the expense category consistent with the function of the impaired asset or CGU. Hudbay presents impairment losses on the consolidated income statements as part of results from operating activities. Impairment losses recognized in respect of a CGU are allocated first to reduce the carrying amount of any goodwill allocated to the CGU and then to reduce the carrying amounts of other assets in the CGU on a pro-rata basis for depreciable assets.

The Company assesses previously recognized impairment losses each reporting date for any indications that the losses have decreased or no longer exist. Such an impairment loss is reversed, in full or in part, if there have been significant changes with a positive effect on the estimates used to determine the recoverable amount. An impairment loss is reversed only to the extent that the asset's carrying amount does not exceed the carrying amount that would have been determined, net of depreciation or amortization, if no impairment loss had been recognized for the asset in prior years. Such reversals of impairment losses are recognized in the consolidated income statements. An impairment loss recognized in relation to goodwill is not reversed for subsequent increases in the recoverable amount.

(k)     Assets held for sale:

The Company classifies non-current assets, or disposal groups consisting of assets and liabilities, as held for sale when it expects to recover their carrying amounts primarily through sale rather than through continuing use. To meet criteria to be held for sale, the sale must be highly probable, and the assets or disposal groups must be available for immediate sale in their present condition. Hudbay must be committed to a plan to sell the assets or disposal group, and the sale should be expected to qualify for recognition as a completed sale within one year from the date of classification.

The Company measures assets or disposal groups at the lower of their carrying amount and fair value less costs of disposal. Impairment losses on initial classification as held for sale and subsequent gains and losses on remeasurement are recognized in the consolidated income statements; however, gains are not recognized in excess of any cumulative impairment loss. Any impairment loss on a disposal group first is allocated to goodwill, and then to remaining assets and liabilities on pro rata basis, except that no loss is allocated to inventories, financial assets, deferred tax assets, employee benefit assets or investment property. Upon classifying assets or disposal groups as held for sale, Hudbay presents the assets separately as a single amount and the liabilities separately as a single amount on the consolidated balance sheets. When an asset no longer meets the criteria for classification as an asset held for sale, the Company records the asset at the lower of its recoverable amount and the carrying amount before the asset was classified as held for sale.

(l)      Pension and other employee benefits:

Hudbay has non-contributory and contributory defined benefit programs for the majority of its Canadian employees. The defined benefit pension benefits are based on years of service and final average salary for the salaried plans and are based on a flat dollar amount combined with years of service for the hourly plans. The Company provides non pension health and other post-employment benefits to certain active employees and pensioners (post-employment benefits) and also provides disability income, health benefits and other post-employment benefits to hourly and salaried disabled employees (other long-term employee benefits).

Hudbay accrues its obligations under the defined benefit plans as the employees render the services necessary to earn the pension and post-employment benefits. The actuarial determination of the accrued benefit obligations for pensions and post-employment benefits uses the projected benefit method pro-rated on service (which incorporates management's best estimate of future salary levels, other cost escalation, retirement ages of employees and other actuarial factors). For other long-term employee benefits, the Company recognizes the full cost of the benefit obligation at the time the employee becomes disabled. Actuarial advice is provided by external consultants.

For the funded defined benefit plans, Hudbay recognizes the deficit or excess of the fair value of plan assets over the present value of the defined benefit obligation as a liability or an asset in the consolidated balance sheets. However, the Company recognizes an excess of assets only to the extent that it represents a future economic benefit which is available in the form of refunds from the plan or reductions in future contributions to the plan. When these criteria are not met, it is not recognized but is disclosed in the notes to the consolidated financial statements. Impacts of minimum funding requirements in relation to past service are considered when determining the balance sheet position.

Defined benefit costs are categorized as follows:

- Service costs (including current service cost, past service cost, as well as gains and losses on curtailments and settlements and administration costs),

- Net interest expense or income, and

- Remeasurement

The first two components of defined benefit costs shown above are recognized in the consolidated income statements. Past service cost is recognized in the consolidated income statements in the period of a plan amendment. Net interest is calculated by applying the discount rate at the beginning of the period to the net defined benefit liability or asset.

Remeasurement, comprising actuarial gains and losses, the effect of changes to the asset ceiling (if applicable) and the return on plan assets (excluding interest), is reflected immediately in the consolidated balance sheets with a gain or loss recognized in OCI in the period in which they occur. Remeasurement recognized in OCI is reflected in the remeasurement reserve and will not be reclassified to the consolidated income statements. For the other long-term employee benefits plan, remeasurements are recognized immediately in the consolidated income statements.

Actuarial determinations used in estimating obligations relating to these plans incorporate assumptions using management's best estimates of factors including plan performance, salary escalation, retirement dates of employees and healthcare cost escalation rates. Due to the complexity of the valuation, the underlying assumptions and its long-term nature, a defined benefit obligation is highly sensitive to changes in these assumptions. All assumptions are reviewed at each reporting date. In determining the appropriate discount rate, management considers the interest rates on corporate bonds in the respective currency with at least an AA rating, with extrapolated maturities corresponding to the expected duration of the defined benefit obligation. The mortality rate is based on publicly available mortality tables for the specific country. Future salary increases and pension increases are based on expected future inflation rates for the respective country.

Hudbay also has defined contribution plans providing pension benefits for certain of its salaried employees and certain of its US employees utilizing 401K plans. The Company recognizes the cost of the defined contribution plans based on the contributions required to be made during each period.

Termination benefits are recognized as an expense when Hudbay is committed demonstrably, without realistic possibility of withdrawal, to a formal detailed plan to either terminate employment before the normal retirement date, or to provide termination benefits as a result of an offer made to encourage voluntary redundancy. Termination benefits for voluntary redundancies are recognized as an expense if the Company has made an offer of voluntary redundancy, it is probable that the offer will be accepted, and the number of acceptances can be estimated reliably. Benefits that are payable more than one year after the reporting period are discounted to their present value.

(m)    Provisions:

Provisions are recognized when Hudbay has a present obligation (legal or constructive) as a result of a past event, it is probable that an outflow of resources will be required to settle the obligation, and a reliable estimate can be made. The provisions are recorded as management's best estimate of the amount required to settle an obligation.

Provisions are stated at their present value, which is determined by discounting the expected future cash flows at a pre-tax rate that reflects current market assessments of the time value of money and the risks specific to the liability.

Decommissioning, restoration and similar liabilities

Provisions are recorded for legal and constructive obligations associated with the future costs of rehabilitating the Company's current and previous operating and development sites. Such costs are associated with decommissioning and restoration activities such as dismantling and removing structures, rehabilitating mines and tailings, and reclamation and re-vegetation of affected areas.

The present value of estimated costs is recorded in the period in which the asset is installed or the environment is disturbed and a reasonable estimate of future costs and discount rates can be made. The provision is discounted using a risk-free rate, and estimates of future cash flows are adjusted to reflect risk.

Subsequent to the initial measurement, the obligation is adjusted to reflect the passage of time and changes in the estimated future cash flows underlying the obligation. The increase in the provision due to the passage of time is recognized as finance expense, whereas increases and decreases due to changes in the estimated future cash flows, which are not the result of current inventory production, are capitalized and depreciated over the life of the related asset. Actual costs incurred upon settlement of the site restoration obligation are charged against the provision to the extent the provision was established for those costs. Upon settlement of the liability, a gain or loss may be recorded. For closed sites, changes to estimated costs are recognized immediately in the consolidated income statements within other operating expenses.

Hudbay assesses the reasonableness of its estimates and assumptions each year and when conditions change, the estimates are revised accordingly. Judgement is required to determine the scope of future decommissioning and restoration activities, as well as best available estimates and assumptions including discount rates, expected timing of decommissioning and restoration costs, inflationary factors and market risks. Changes in cost estimates, which may arise from changes in technology and pricing of the individual components of the cost may result in offsetting changes to the asset and liability and corresponding changes to the associated depreciation and finance costs. In view of the uncertainties concerning these future obligations, the ultimate timing and cost of reclamation and mine closure may differ materially from these estimates.

If the change in estimate results in a significant increase in the decommissioning liability and therefore an addition to the carrying value of the asset, the Company considers whether this is an indication of impairment of the asset as a whole and, if so, tests for impairment in accordance with IAS 36, Impairment of Assets. If, for mature mines, the revised mine assets net of decommissioning and restoration liabilities exceeds the recoverable value, that portion of the increase is charged directly to expense as an impairment loss.

In view of the uncertainties concerning environmental remediation, the ultimate cost of decommissioning and restoration liabilities could differ materially from the estimated amounts provided. The estimate of the total liability is subject to change based on amendments to laws and regulations and as new information concerning Hudbay's operations becomes available. Future changes, if any, to the estimated total liability as a result of amended requirements, laws, regulations and operating assumptions, as well as discount rates, may be significant and would be recognized prospectively as a change in accounting estimate, when applicable. Environmental laws and regulations are continually evolving in all regions in which the Company operates. Hudbay is not able to determine the impact, if any, of environmental laws and regulations that may be enacted in the future on its results of operations or financial position due to the uncertainty surrounding the ultimate form that such future laws and regulations may take.

Onerous contracts

A contract is considered to be onerous when the unavoidable costs of meeting obligations under the contract exceed the economic benefits expected to be received under it. Hudbay records a provision for any onerous contracts at the lesser of costs to comply with a contract and costs to terminate it.

Restructuring provisions

A provision for restructuring is recognized when management, with appropriate authority within Hudbay, has approved a detailed and formal restructuring plan, and the restructuring has either commenced or has been announced publicly. Future operating costs are not provided for.

(n)  Financial instruments:

Non-derivative financial instruments are initially recognized at fair value plus, in the case of a financial asset or financial liability not measured at fair value through profit or loss, directly attributable transaction costs. Measurement in subsequent periods depends on the financial instrument's classification. Hudbay uses trade date accounting for regular way purchases or sales of financial assets. The Company determines the classification of its financial instruments and non-financial derivatives at initial recognition.

Financial assets and liabilities are offset and the net amount presented in the consolidated balance sheets when, and only when, Hudbay has a legal right to offset the amounts and intends either to settle on a net basis or to realize the asset and settle the liability simultaneously.

The classification of financial assets is based on the results of the contractual characteristics test and the business model assessment which will result in the financial asset being classified as either: amortized cost, fair value through profit or loss ("FVTPL") or fair value through other comprehensive income ("FVTOCI").

i.      Non-derivative financial instruments - classification:

Financial assets at fair value through profit or loss

Provisionally priced copper sales receivables, warrants and investments in securities of junior mining companies are classified as financial assets at fair value through profit or loss and are measured at fair value. The unrealized gains or losses related to changes in fair value are reported in other finance income/expense in the consolidated income statements.

Amortized cost

Cash, certain receivables, payables and restricted cash are classified as and measured at amortized cost and are carried at amortized cost using the effective interest rate method, less impairment losses, if any.

Non-derivative financial liabilities

Accounts payable and senior unsecured notes are initially recognized at fair value and subsequently accounted for at amortized cost, using the effective interest method. The amortization of senior unsecured notes issue costs is calculated using the effective interest rate method.

ii.       Derivatives:

Derivatives are initially recognized at fair value when Hudbay becomes a party to the derivative contract and are subsequently re-measured to fair value at the end of each reporting period. The resulting gain or loss is recognized in the consolidated income statements immediately unless the derivative is designated and effective as a hedging instrument. Derivatives with positive fair value are recognized as assets; derivatives with negative fair value are recognized as liabilities.

Contracts to buy or sell non-financial items that meet the definition of a derivative but were entered into and are held in accordance with the Company's expected purchase, sale or usage requirements are not recognized as derivatives. Such contracts are recorded as non-derivative purchases and sales.

iii.      Embedded derivatives:

Hudbay considers whether a contract contains an embedded derivative when it becomes a party to the contract. Derivatives embedded in other financial liabilities or other host contracts are treated as separate derivatives when their risks and characteristics are not closely related to those of the host contracts and the host contracts are not measured at FVTPL.

iv.       Fair values of financial instruments:

The fair value of a financial instrument is the amount for which an asset could be exchanged, or a liability settled, between knowledgeable, willing parties in an arm's length transaction.

Fair values of financial instruments traded in active markets are determined based on quoted market prices, where available. Bid prices are generally used for assets held or liabilities to be issued; asking prices are generally used for assets to be acquired or liabilities held.

For financial instruments not traded in an active market, fair values are determined based on appropriate valuation techniques. Such techniques may include discounted cash flow analysis, using recent arm's length market transactions, reference to the current fair value of another instrument that is substantially the same, and other valuation models.

The Company applies a hierarchy to classify valuation methods used to measure financial instruments carried at fair value. Levels 1 to 3 are defined based on the degree to which fair value inputs are observable and have a significant effect on the recorded fair value, as follows:

-  Level 1: Quoted prices (unadjusted) in active markets for identical assets or liabilities;

-  Level 2: Valuation techniques use significant observable inputs, either directly (i.e. as prices) or indirectly (i.e. derived from prices), or valuations are based on quoted prices for similar instruments; and,

-  Level 3: Valuation techniques use significant inputs that are not based on observable market data (unobservable inputs).

An analysis of fair values of financial instruments is provided in note 27.

v.        Impairment of financial instruments:

Hudbay recognizes loss allowances for Expected Credit Losses ("ECL") for trade receivables not measured at FVTPL.

Loss allowances for trade receivables are measured at an amount equal to lifetime ECL. ECL is a probability-weighted estimate measured at the present value of all cash shortfalls including the impact of forward-looking information.

Hudbay has established a provision based on the Company's historical credit loss experience, adjusted for forward-looking factors specific to the debtors and the economic environment.

The loss allowance is presented as a deduction to trade receivables in the balance sheets.

vi.       Derecognition of financial instruments:

Hudbay derecognizes financial assets when the contractual rights to the cash flows from the assets expire, or when the Company transfers the rights to receive the contractual cash flows on the financial assets in a transaction in which substantially all the risks and rewards of ownership of the financial asset are transferred. Any interest in the transferred financial assets that is created or retained by Hudbay is recognized as a separate asset or liability.

Hudbay derecognizes financial liabilities when its contractual obligations are discharged, cancelled or expire or when its terms are modified and the cash flows of the modified liability are substantially different.

(o)  Taxation:

Current Tax

Current income tax assets and liabilities for the current and prior periods are measured at the amount expected to be recovered from or paid to the taxation authorities. The tax rates and tax laws used to compute the amount are those that are enacted or substantively enacted by the balance sheet date.

Hudbay is subject to income taxes in numerous jurisdictions. Significant judgement is required in determining the worldwide provision for income taxes due to the complexity of legislation. There are many transactions and calculations for which the ultimate tax determination is uncertain during the ordinary course of business. The Company recognizes liabilities for anticipated tax issues based on estimates of whether additional taxes will be due. Where the final tax outcome of these matters is different from the amounts that were initially recorded, such differences will affect the income tax and deferred tax provisions in the period in which such determination is made.

Additionally, future changes in tax laws in the jurisdictions in which Hudbay operates could limit the ability of the Company to obtain tax deductions in future periods.

Deferred Tax

Deferred tax is recognized using the balance sheet method in respect of temporary differences at the balance sheet date between the tax basis of assets and liabilities, and their carrying amounts for financial reporting purposes.

Deferred income tax liabilities are recognized for all taxable temporary differences, except:

- where the deferred income tax liability arises from the initial recognition of goodwill, or the initial recognition of an asset or liability in a transaction that is not a business combination and, at the time of the transaction, affects neither the accounting profit nor taxable profit or loss; and

- in respect of taxable temporary differences associated with investments in subsidiaries, associates and interests in joint ventures, where the timing of the reversal of the temporary differences can be controlled and it is probable that the temporary differences will not reverse in the foreseeable future.

Deferred income tax assets are recognized for all deductible temporary differences, carry-forward of unused tax assets and unused tax losses, to the extent that it is probable that taxable profit will be available against which the deductible temporary differences, and the carry-forward of unused tax assets and unused tax losses can be utilized, except:

- where the deferred income tax asset relating to the deductible temporary difference arises from the initial recognition of an asset or liability in a transaction that is not a business combination and, at the time of the transaction, affects neither the accounting profit nor taxable profit or loss; and

- in respect of deductible temporary differences associated with investments in subsidiaries, associates and interests in joint ventures, deferred tax assets are recognized only to the extent that it is probable that the temporary differences will reverse in the foreseeable future and taxable profit will be available against which the temporary differences can be utilized.

To the extent that it is probable that taxable profit will be available to offset the deductible temporary differences, Hudbay recognizes the deferred tax asset regarding the temporary difference on decommissioning, restoration and similar liabilities and recognizes the corresponding deferred tax liability regarding the temporary difference on the related assets.

The carrying amount of deferred income tax assets is reviewed at each balance sheet date and reduced to the extent that it is no longer probable that sufficient taxable profit will be available to allow all or part of the deferred income tax asset to be utilized. Unrecognized deferred income tax assets are reassessed at each balance sheet date and are recognized to the extent that it has become probable that future taxable profit will be available to allow the deferred tax asset to be recovered.

Judgement is required in determining whether deferred tax assets are recognized on the consolidated balance sheets. Deferred tax assets, including those arising from unutilized tax losses, require management to assess the likelihood of taxable profit in future periods in order to utilize recognized deferred tax assets. Estimates of future taxable income are based on forecast cash flows from operations and the application of existing tax laws in each jurisdiction. To the extent that future cash flows and taxable income differ significantly from estimates, the ability to realize the net deferred tax assets recorded at the balance sheet date could be affected.

Deferred tax is measured on an undiscounted basis at the tax rates that are expected to apply in the periods in which the asset is realized or the liability is settled, based on tax rates and tax laws enacted or substantively enacted at the balance sheet date.

Deferred income tax assets and deferred income tax liabilities are offset if a legally enforceable right exists to offset current tax assets against current tax liabilities and the deferred income taxes relate to the same taxable entity and the same taxation authority.

Current and deferred taxes relating to items recognized outside profit or loss (whether in other comprehensive income or directly in equity) are recognized outside profit or loss and not in the consolidated income statements. Mining taxes and royalties are treated and disclosed as current and deferred taxes if they have the characteristics of an income tax.

(p)  Share capital and reserves:

Transaction costs

Transaction costs directly attributable to equity transactions are recognized as a deduction from equity.

Other capital reserve

The other capital reserve is used for equity-settled share-based compensation and includes amounts for stocks options granted and not exercised.

Foreign currency translation reserve

The foreign currency translation reserve is used to record exchange differences arising from the translation of the financial statements of foreign operations. Exchange differences arising from the translation of the financial statements of foreign operations form part of the net investment in the foreign operation. Translation gains and losses remain in the reserve until disposal of all or a portion of the foreign operation.

(q)  Share-based compensation:

Hudbay offers a Deferred Share Unit ("DSU") plan for non-employee members of the Board of Directors, a Restricted Share Unit ("RSU") plan for employees, a Performance Share Unit ("PSU") plan for employees and a stock option plan for employees. These plans are included in provisions on the consolidated balance sheets and further described in note 24. Changes in the fair value of the liabilities are recorded in the consolidated income statements.

Cash-settled transactions, consisting of DSUs, RSUs and PSUs, are initially measured at fair value and recognized as an obligation at the grant date. The liabilities are remeasured to fair value at each reporting date up to and including the settlement date, with changes in fair value recognized in the consolidated income statements. Hudbay values the liabilities based on the change in the Company's share price. Additional DSUs, RSUs and PSUs are credited to reflect dividends paid on Hudbay common shares over the vesting period. The current portion of the liability reflects those grants that have vested or that are expected to vest within twelve months.

DSUs vest on the grant date and are redeemable when a participant is no longer a member of the Board of Directors. Issue and redemption prices of DSUs are based on the average closing price of the Company's common shares for the five trading days prior to issuance or redemption.

RSUs and PSUs are issued under Hudbay's Long Term Equity Plan ("LTEP Plan") and vest on or before December 31st of the third calendar year after the year in which the services corresponding to such share unit award were performed. RSUs and PSUs granted under the LTEP Plan may be settled in the form of the Company's common shares or, at the option of Hudbay, the cash equivalent based on the market price of the common shares as of the vesting date. Hudbay has historically settled RSUs in cash. Except in specified circumstances, RSUs and  PSUs terminate when an employee ceases to be employed by the Company. Valuations of RSUs and PSUs reflect estimated forfeitures.

Equity-settled transactions with employees relate to stock options and are measured by reference to the fair value at the earlier of the grant date and the date that the employee unconditionally became entitled to the award. Fair value is determined using a Black-Scholes option pricing model, which relies on estimates of the future risk-free interest rate, future dividend payments, future share price volatility and the expected average life of the options. Hudbay believes this model adequately captures the substantive features of the option awards and is appropriate to calculate their fair values. The fair value determined at the grant date is recognized over the vesting period in accordance with vesting terms and conditions, with a corresponding increase to other capital reserves. The amount recognized as an expense is adjusted to reflect the number of awards for which the related service and non-market vesting conditions are expected to be met.

(r) Earnings per share:

The Company presents basic and diluted earnings (loss) per share ("EPS") data for its common shares. Basic EPS is calculated by dividing the profit or loss attributable to common shareholders of the Company by the weighted average number of common shares outstanding during the period. Diluted EPS is determined by adjusting the profit or loss attributable to common shareholders and the weighted average number of common shares outstanding for the effects of all dilutive potential common shares, which previously consisted of stock options granted to employees and warrants.

When calculating earnings per share for periods where the Company has a loss, Hudbay's calculation of diluted earnings per share excludes any incremental shares from the assumed conversion of stock options as they would be anti-dilutive.

(s) Leases:

Leases, under which substantially all the risks and rewards incidental to ownership of the leased item are transferred to Hudbay, are capitalized as assets at the inception of the lease at the lower of fair value or the present value of the minimum lease payments. Lease payments are apportioned between finance charges and the reduction of the liability so as to achieve a constant periodic rate of interest on the remaining balance of the liability. Finance charges are reflected in the consolidated income statements as finance costs.

Non-ROU lease payments are recognized as an expense in the consolidated income statements on a straight-line basis over the lease term.

(t) Segment reporting:

An operating segment is a component of the Company that engages in business activities from which it may earn revenue and incur expenses and for which discrete financial information is available. Hudbay's chief executive officer regularly reviews the operating results of each operating segment to make decisions about resources to be allocated to the segment and assess its performance. In determining operating segments, Hudbay considers location and decision-making authorities. Refer to note 31.

(u) Statement of cash flows:

Hudbay presents interest paid and dividends paid as financing activities, except if the interest is related to capitalized borrowing costs, and interest received is presented as an investing activity in the consolidated statement of cash flow. Hudbay presents the consolidated statement of cash flows using the indirect method.

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New standards

12 Months Ended

Dec. 31, 2020

Disclosure of changes in accounting estimates [abstract]

New standards [Text Block]

4. New standards

New standards and interpretations adopted

(a) Amendment to IFRS 3 - Business Combinations

The amendment to IFRS 3 clarifies the definition of a business and includes an optional concentration test to determine whether an acquired set of activities and assets is a business. This amendment is in effect January 1, 2020 and will be applied prospectively to future acquisition transactions.

New standards and interpretations not yet adopted

(b) Amendment to IAS 16 - Property, Plant and Equipment

The amendments to IAS 16 prohibit deducting from the cost of property, plant and equipment the proceeds from selling items produced while bringing the assets to the location and condition necessary for them to be capable of operating in the manner intended by management. Instead, a company will recognize such sales proceeds and related cost in profit or loss. This amendment is in effect January 1, 2022 with early adoption permitted.

Hudbay intends to early adopt this amendment as of January 1, 2021 with retrospective application only to items of property, plant and equipment that were brought to the location and condition necessary for them to be capable of operating in the manner intended by management on or after January 1, 2020. The Company expects that the adoption of this amendment will impact the 2021 consolidated financial statements as it expects certain development projects to achieve commercial production in 2021, however, no restatement of prior periods is expected.

(c) Interest Rate Benchmark Reform - Phase II - Amendments to IFRS 9, IAS 39, IFRS 7, IFRS 4 and IFRS 6

These amendments require companies to determine if there is a significant change in the basis of determining  contractual cash flows as a result of interest rate benchmark reform / IBOR reform. A company will be required to determine if the replacement of an existing interest rate benchmark with an alternative rate benchmark results in contractual cash flows that are significantly different for financial instruments, lease payments, insurance contracts and/or items that use hedge accounting. If IBOR reform result in a transition on an economically equivalent basis with no value transfer having occurred, the changes to the standard allow the contractual cash flow changes to be applied prospectively, similar to a change in a market rate. These amendments are in effect for periods beginning on or after January 1, 2021 with earlier application being permitted and with retrospective application required. An entity is not required to restate prior periods.

Hudbay does not believe the impact of these amendments will result in material changes to the consolidated financial statements.

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Acquisition of remaining interest in the Rosemont project

12 Months Ended

Dec. 31, 2020

Disclosure of detailed information about business combination [abstract]

Acquisition of remaining interest in the Rosemont project [Text Block]

5.    Acquisition of remaining interest in the Rosemont project

In March 2019, the Company entered into an agreement with United Copper & Moly LLC ("UCM") to purchase UCM's remaining 7.95% interest in the Rosemont project, and to terminate all of UCM's remaining earn-in and off-take rights. The acquisition was completed on April 25, 2019.

Upfront cash consideration of $45,000 was paid on April 25, 2019, and the Company also committed to pay three annual installments of $10,000 per year, commencing July 1, 2022.

To facilitate an orderly acquisition of UCM's interest in Rosemont, Hudbay, immediately prior to closing the acquisition, agreed to release UCM from repayment obligations under an intercompany Rosemont project loan in exchange for an increase in equity interest in Rosemont. As a result, the loan receivable balance of $25,978 was written off. The Company recognized the loss on the loan receivable in the income statement (refer to note 6d). In addition, in order to recognize previously unfunded contributions to the Rosemont Project due from UCM, Hudbay recognized an increase to other capital reserves, a component of shareholder's equity.

The acquisition provides Hudbay with 100% ownership of Rosemont, allowing greater strategic flexibility with respect to capital structure and project financing alternatives. In exchange for acquiring the percentage ownership not already owned by Hudbay, the Company paid:

Cash	$	45,000
Present value of future cash installments		23,557
Total consideration	$	68,557

As part of the increase in ownership of the Rosemont Project, Hudbay acquired and assumed the following assets and liabilities, which represented the fair value of the assets and liabilities not already owned by Hudbay at the time of transaction:

Current assets	$	343
Non-current assets		68,904
Liabilities		(690	)
Net assets acquired	$	68,557

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Revenue and expenses

12 Months Ended

Dec. 31, 2020

Analysis of income and expense [abstract]

Revenue and expenses [Text Block]

6. Revenue and expenses

(a) Revenue

Hudbay's revenue by significant product types:

		Year ended December 31,
		2020			2019
Copper	$	563,910		$	786,332
Zinc		264,106			284,897
Gold		180,949			120,366
Silver		25,986			29,315
Molybdenum		25,627			31,270
Other		5,619			4,760
		1,066,197			1,256,940
Non-cash streaming arrangement items 1
Amortization of deferred revenue - gold		27,854			32,028
Amortization of deferred revenue - silver		39,409			60,370
Amortization of deferred revenue - variable consideration adjustments - prior periods		6,668			(16,295	)
		73,931			76,103
Pricing and volume adjustments 2		9,178			(12,123	)
		1,149,306			1,320,920
Treatment and refining charges		(56,888	)		(83,481	)
	$	1,092,418		$	1,237,439
1 See note 18.
2 Pricing and volume adjustments represent mark-to-market adjustments on initial estimate of provisionally priced sales, realized and unrealized changes to fair value for non-hedge derivative contracts and adjustments to originally invoiced weights and assays.

Consideration from the Company's stream agreements is considered variable (note 18). Gold and silver stream revenue can be subject to cumulative adjustments when the amount of precious metals to be delivered under the contract changes. As a result of changes in the Company's mineral reserve and resource estimate in the first quarter of 2020 and amendments made to the 777 mine plan in the third quarter of 2020, the amortization rate by which deferred revenue is drawn down into income was adjusted and, as required, a current period catch up adjustment is made for all prior year stream revenues since the stream agreement inception date. This variable consideration adjustment for the year ended December 31, 2020 resulted in increased revenue of $6,668. The variable consideration adjustment for the year ended December 31, 2019 resulted in a reversal of revenue of $16,295.

(b) Depreciation and amortization

Depreciation of property, plant and equipment and amortization of intangible assets are reflected in the consolidated income statements as follows:

		Year ended December 31,
		2020		2019
Cost of sales	$	361,827	$	344,555
Selling and administrative expenses		1,776		2,079
	$	363,603	$	346,634

(c) Share-based compensation expenses

Share-based compensation expenses are reflected in the consolidated income statements as follows:

		Cash-settled								Total share-based compensation expense
		RSUs		DSUs		PSUs		Stock options
Year ended December 31, 2020
Cost of sales	$	1,400	$	—	$	—	$	—	$	1,400
Selling and administrative		4,872		5,149		1,987		1,122		13,130
Other expenses		478		—		—		—		478
	$	6,750	$	5,149	$	1,987	$	1,122	$	15,008
Year ended December 31, 2019
Cost of sales	$	400	$	—	$	—	$	—	$	400
Selling and administrative		928		1,157		—		—		2,085
Other expenses		229		—		—		—		229
	$	1,557	$	1,157	$	—	$	—	$	2,714

During the twelve months ended December 31, 2020, the Company granted 1,581,385 stock options (twelve months ended December 31, 2019 - nil). For further details on stock options, see note 24b.

(d) Other expenses

		Year ended December 31,
		2020		2019
Regional costs	$	3,602	$	3,780
Loss on disposal of property, plant and equipment		5,088		4,807
Closure cost adjustment - non-producing properties		2,721		2,289
Allocation of community costs		2,880		2,216
Write down of UCM receivable		—		25,978
Pampacancha delivery obligation		—		7,499
Other		3,292		4,547
	$	17,583	$	51,116

During the first quarter of 2019, Hudbay recognized an obligation to deliver additional precious metal credits to Wheaton Precious Metals ("Wheaton") as a result of Hudbay's expectation that mining at the Pampacancha deposit would not begin until after January 1, 2020. The obligation was paid in four quarterly installments, with all payments having been made in 2020.

(e) Impairment

During 2019, Hudbay recorded impairment losses of $322,249 for non-current assets relating to the Arizona cash generating units ("CGU").

		Arizona
Pre-tax impairment to:
Property, plant & equipment	$	322,249
Tax impact - (recovery)		(80,143	)
After-tax impairment charge	$	242,106

On July 31, 2019, the U.S. District Court of the District of Arizona ("Court") issued a ruling in the lawsuits challenging the U.S. Forest Service's issuance of the Final Record of Decision ("FROD") for the Rosemont project in Arizona. The Court ruled to vacate and remand the FROD thereby delaying the expected start of construction of Rosemont. Hudbay and the U.S. federal government have appealed the Court's decision to the U.S. Ninth Circuit Court of Appeals. However, the Court's ruling and the subsequent impact to the Company's market capitalization gave rise to an indicator of impairment. Following an impairment test conducted as of September 30, 2019, it was determined that the recoverable amount of the Arizona CGU was lower than its carrying value, causing Hudbay to recognize an impairment loss related to these assets.

(f) Employee benefits expense

This table presents employee benefit expense recognized in Hudbay's consolidated income statements, including amounts transferred from inventory upon sale of goods:

		Year ended December 31,
		2020		2019
Current employee benefits	$	179,486	$	171,173
Share-based compensation (notes 6c, 19, 24)
Equity settled stock options		1,122		—
Cash-settled restricted share units		6,750		1,557
Cash-settled deferred share units		5,149		1,157
Cash-settled performance share units		1,987		—
Employee share purchase plan		1,783		1,645
Post-employee pension benefits
Defined benefit plans		11,671		10,643
Defined contribution plans		1,774		1,635
Other post-retirement employee benefits		9,305		8,457
Termination benefits		582		628
	$	219,609	$	196,895

Manitoba has a profit sharing plan required by the collective bargaining agreement whereby 10% of Manitoba's after tax profit (excluding provisions or recoveries for deferred income tax and deferred mining tax) for any given fiscal year will be distributed to all eligible employees in the Flin Flon/Snow Lake operations, with the exception of executive officers and key management personnel.

Peru has a profit sharing plan required by Peruvian law whereby 8% of Peru's taxable income will be distributed to all employees within Peru's operations.

The Company has an employee share purchase plan for executives and other eligible employees where participants may contribute between 1% and 10% of their pre-tax base salary to acquire Hudbay shares. The Company makes a matching contribution of 75% of the participant's contribution.

See note 20 for a description of Hudbay's pension plans and note 21 for Hudbay's other employee benefit plans.

(g) Net finance expenses

		Year ended December 31,
		2020			2019
Net interest expense on long-term debt
Interest expense on long-term debt	$	82,712		$	78,265
Interest capitalized		—			(9,890	)
		82,712			68,375
Accretion on streaming arrangements (note 18)
Current year additions		60,362			63,725
Variable consideration adjustments - prior periods		(3,692	)		6,047
		56,670			69,772
Change in fair value of financial assets and liabilities at fair value through profit or loss
Embedded derivatives		(45,387	)		3,708
Gold prepayment liability		20,141			—
Investments		(4,124	)		4,539
		(29,370	)		8,247
Other net finance costs
Net foreign exchange (gains) losses		(1,644	)		1,388
Accretion on community agreements measured at amortized cost		3,641			1,222
Unwinding of discounts on provisions		3,543			4,392
Withholding taxes		8,267			8,100
Premium paid on redemption of notes (note 17)		7,252			—
Write-down of unamortized transaction costs (note 17)		3,817			—
Other finance expense		8,826			11,027
Interest income		(1,812	)		(8,527	)
		31,890			17,602
Net finance expense	$	141,902		$	163,996

Until October 1, 2019, interest expense related to certain long-term debt had been capitalized to the Rosemont project. Following the Court ruling to vacate and remand the U.S. Forest Service's issuance of the Final Record of Decision for the Rosemont project during the third quarter of 2019, Hudbay ceased capitalization effective October 1, 2019. The capitalization of this interest expense will resume upon the reinstatement of permits and will continue from that point until commercial production is reached.

Other finance expense relates primarily to fees on Hudbay's revolving credit facilities and leases.

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Cash

12 Months Ended

Dec. 31, 2020

Cash and cash equivalents [abstract]

Cash [Text Block]

7. Cash

Cash balances represent deposits with a maturity date of less than 3 months.

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Trade and other receivables

12 Months Ended

Dec. 31, 2020

Trade and other receivables [abstract]

Trade and other receivables [Text Block]

8.      Trade and other receivables

		Dec. 31, 2020		Dec. 31, 2019
Current
Trade receivables	$	107,787	$	87,332
Statutory receivables		28,445		16,543
Other receivables		4,967		2,119
		141,199		105,994
Non-current
Taxes receivable		16,941		17,669
Other receivables		1,627		1,595
		18,568		19,264
	$	159,767	$	125,258

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Inventories

12 Months Ended

Dec. 31, 2020

Disclosure Of Inventories [Abstract]

Inventories [Text Block]

9. Inventories

		Dec. 31, 2020		Dec. 31, 2019
Current
Stockpile	$	13,906	$	10,396
Work in progress		6,364		14,420
Finished goods		72,923		62,230
Materials and supplies		49,912		51,774
		143,105		138,820
Non-current
Stockpile		16,704		14,626
Materials and supplies		5,302		4,829
		22,006		19,455
	$	165,111	$	158,275

The cost of inventories recognized as an expense, including depreciation, and included in cost of sales amounted to $921,895 for the year ended December 31, 2020 (year ended December 31, 2019 -  $978,810).

During the year ended December 31, 2020, Hudbay recognized a net expense of $32 in cost of sales related to adjustments of the carrying value of inventories to net realizable value (year ended December 31, 2019 - $504). Adjustments to the carrying value of inventories to net realizable value were related to changes in commodity prices.

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Other financial assets

12 Months Ended

Dec. 31, 2020

Disclosure of financial assets [abstract]

Other financial assets [Text Block]

10. Other financial assets

		Dec. 31, 2020		Dec. 31, 2019
Current
Derivative assets	$	2,736	$	1,712
Restricted cash		337		337
		3,073		2,049
Non-current
Investments at fair value through profit or loss		15,669		11,287
	$	18,742	$	13,336

Investments at fair value through profit or loss consist of securities in Canadian metals and mining companies, all of which are publicly traded. The change in investments at fair value through profit or loss is mostly attributed to fluctuations in market price and foreign exchange impact.

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Intangibles and other assets

12 Months Ended

Dec. 31, 2020

Disclosure of detailed information about intangible assets [abstract]

Intangibles and other assets [Text Block]

11.    Intangibles and other assets

Intangibles and other assets of $21,173 includes $15,764 of other assets (December 31, 2019 - $5,384) and $5,409 of intangibles (December 31, 2019 - $5,027).

Other assets represent the carrying value of certain future community costs. The liability remaining for these agreements is recorded in other financial liabilities at amortized cost (note 15)). Amortization of the carrying amount is recorded in the consolidated income statements within other expenses (note 6d) or exploration expense, depending on the nature of the agreement. The increase in other assets during the year ended December 31, 2020 primarily relates to amendments to the original agreements with communities for the Constancia operation which allow Hudbay to extract minerals over the useful life of the Constancia operation.

Intangibles mainly represent computer software costs.

	Dec. 31, 2020		Dec. 31, 2019
Cost
Balance, beginning of year	$	21,538	$	18,557
Additions		1,466		2,325
Disposals		—		(96	)
Effects of movement in exchange rates		346		752
Balance, end of year		23,350		21,538
Accumulated amortization
Balance, beginning of year		16,511		14,395
Additions		1,138		1,606
Disposals		—		(96	)
Effects of movement in exchange rates		292		606
Balance, end of year		17,941		16,511
Intangibles, net book value	$	5,409	$

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Property, plant and equipment

12 Months Ended

Dec. 31, 2020

Disclosure of detailed information about property, plant and equipment [abstract]

Property, plant and equipment [Text Block]

12. Property, plant and equipment

Dec. 31, 2020		Exploration and evaluation assets		Capital works in progress			Mining properties			Plant and equipment			Plant and equipment- ROU assets			Total
Balance, Jan. 1, 2020	$	69,903	$	733,874		$	2,146,583		$	2,653,752		$	201,972		$	5,806,084
Additions		809		256,251			311			28,523			17,759			303,653
Capitalized stripping and development		—		—			83,137			—			—			83,137
Decommissioning and restoration		—		263			6,849			39,680			—			46,792
Interest capitalized		—		—			—			—			—			—
Transfers and other movements		8,040		(36,668	)		(41,256	)		70,777			(893	)		—
Disposals		—		—			—			(19,681	)		(5,884	)		(25,565	)
Effects of movements in exchange rates		307		3,442			21,837			20,668			1,349			47,603
Balance, Dec. 31, 2020		79,059		957,162			2,217,461			2,793,719			214,303			6,261,704
Accumulated depreciation
Balance, Jan. 1, 2020		—		—			963,530			1,069,687			110,308			2,143,525
Depreciation for the year		—		—			146,113			200,632			23,351			370,096
Disposals		—		—			—			(14,038	)		(2,475	)		(16,513	)
Effects of movement in exchange rates		—		—			16,631			15,300			1,010			32,941
Balance, Dec. 31, 2020		—		—			1,126,274			1,271,581			132,194			2,530,049
Net book value	$	79,059	$	957,162		$	1,091,187		$	1,522,138		$	82,109		$	3,731,655

Dec. 31, 2019		Exploration and evaluation assets		Capital works in progress			Mining properties			Plant and equipment			Plant and equipment- ROU assets1			Total
Balance, January 1, 2019	$	52,206	$	873,781		$	1,998,439		$	2,473,176		$	180,151		$	5,577,753
Additions		17,016		109,372			—			33,309			22,158			181,855
Acquisitions (note 5)		—		91,332			3,157			—			373			94,862
Capitalized stripping and development		—		—			103,108			—			—			103,108
Decommissioning and restoration		—		41			3,314			86,053			—			89,408
Interest capitalized		—		9,890			—			—			—			9,890
Transfers and other movements		—		(30,000	)		642			30,406			(1,048	)		—
Impairments (note 6e)		—		(322,249	)		—			—			—			(322,249	)
Disposals		—		(2,029	)		—			(10,747	)		(1,533	)		(14,309	)
Effects of movements in exchange rates		681		1,528			41,080			38,452			1,793			83,534
Other		—		2,208			(3,157	)		3,103			78			2,232
Balance, Dec. 31, 2019		69,903		733,874			2,146,583			2,653,752			201,972			5,806,084
Accumulated depreciation
Balance, January 1, 2019		—		—			780,754			872,330			89,877			1,742,961
Depreciation for the year		—		—			154,970			179,062			19,850			353,882
Disposals		—		—			—			(6,675	)		—			(6,675	)
Effects of movement in exchange rates		—		—			27,806			24,970			581			53,357
Balance, Dec. 31, 2019		—		—			963,530			1,069,687			110,308			2,143,525
Net book value	$	69,903	$	733,874		$	1,183,053		$	1,584,065		$	91,664		$	3,662,559

At December 31, 2019 capital works in progress decreased compared to January 1, 2019 as a result of the impairment charge of $322,249 (pre-tax) related to the Arizona CGU (see note 6e), partially offset by fixed asset additions.

For the impairment test completed at September 30, 2019, Fair Value Less Cost of Disposal, ("FVLCD") was used to determine the recoverable amount since it is higher than value in use. FVLCD was calculated using discounted after-tax cash flows based on cash flow projections and assumptions in Hudbay's most current life of mine ("LOM") plans. The fair value measurement in its entirety is categorized as Level 3 based on the degree to which fair value inputs are observable and have a significant effect on the recorded fair value.

LOM plans are based on optimized mine and processing plans and the assessment of capital expenditure requirements of a mine site. LOM plans incorporate management's best estimates of key assumptions which are discount rates, future commodity prices, production based on current estimates of recoverable reserves, future operating and capital costs, value of mineral resources not included in the LOM plan, beginning date of project cash flows incorporating permit related project delays and future foreign exchange rates.

The discount rate was based on the CGU's weighted average cost of capital, of which the two main components are the cost of equity and the after-tax cost of debt. Cost of equity was calculated based on the capital asset pricing model, incorporating the risk-free rate of return based on the US Government's marketable bond yields as at the valuation date, the Company's beta coefficient adjustment to the market equity risk premium based on the volatility of the Company's return in relation to that of a comparable market portfolio, plus a country risk premium, size premium and company-specific risk factor. Cost of debt was determined by applying an appropriate market indication of the Company's borrowing capabilities and the corporate income tax rate applicable to the Arizona CGU. As at September 30, 2019, a real discount rate of 9.50% for the Arizona CGU was used to calculate the estimated after-tax discounted future net cash flows, commensurate with its individual estimated level of risk.

Commodity prices used in the impairment assessment were determined by reference to external market participant sources. The key commodity price for this assessment is the price of copper. Where applicable to each of Hudbay's CGUs, the cash flow calculations were based on estimates of future production levels applying forecasts for metal prices, which included forecasts for long-term prices. As at September 30, 2019, for the Arizona CGU, the cash flow calculations utilized a long-term copper price of $3.10/lb, molybdenum long-term prices of $11.00/lb and capital, operating and reclamation costs based on the most current LOM plans.

Expected future cash flows used to determine the FVLCD used in the impairment testing are inherently uncertain and could materially change over time. Should management's estimate of the future not reflect actual events, impairments may be identified. This may have a material effect on the Company's consolidated financial statements. Although it is reasonably possible for a change in key assumptions to occur, the possible effects of a change in any single assumption may not fairly reflect the impact on a CGU's fair value as the assumptions are inextricably linked. For example, a decrease in the assumed price of long-term copper could result in amendments to the mine plans which would partially offset the effect of lower prices. It is difficult to determine how all of these factors would interrelate; however, in deriving a recoverable amount, management believes all of these factors need to be considered.

As at September 30, 2019, the carrying value of the Arizona CGU exceeded the estimated recoverable amount of $615,368 by $242,106 (after-tax), leading to the impairment charge recorded (note 6e).

At December 31, 2020, the Company assessed whether there were impairment or impairment reversal indicators associated the general business environment and known changes to business planning and determined there were none (note 6e).

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Trade and other payables

12 Months Ended

Dec. 31, 2020

Trade and other payables [abstract]

Trade and other payables [Text Block]

13. Trade and other payables

		Dec. 31, 2020		Dec. 31, 2019
Trade payables	$	104,598	$	68,742
Accruals and payables		72,698		80,375
Accrued interest		30,766		34,603
Exploration and evaluation payables		1,351		884
Statutory payables		23,734		7,800
	$	233,147	$	192,404

Accruals and payables include operational and capital costs and employee benefit amounts owing.

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Other liabilities

12 Months Ended

Dec. 31, 2020

Miscellaneous current liabilities [abstract]

Other liabilities [Text Block]

14. Other liabilities

		Dec. 31, 2020		Dec. 31, 2019
Current
Provisions (note 19)	$	33,675	$	33,575
Pension liability (note 20)		13,552		12,015
Other employee benefits (note 21)		3,154		2,806
Unearned revenue		1,590		1,015
	$	51,971	$	49,411

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Other financial liabilities

12 Months Ended

Dec. 31, 2020

Disclosure of financial liabilities [abstract]

Other financial liabilities [Text Block]

15. Other financial liabilities

		Dec. 31, 2020		Dec. 31, 2019
Current
Derivative liabilities	$	15,312	$	10,295
Embedded derivatives (note 27d)		—		9,074
Other financial liabilities at amortized cost		9,401		8,707
		24,713		28,076
Non-current
Deferred Rosemont acquisition consideration		25,961		24,491
Gold prepayment liability		137,031		—
Other financial liabilities at amortized cost		31,386		15,293
		194,378		39,784
	$	219,091	$	67,860

The derivative liabilities include derivative and hedging transactions. Derivative liabilities are carried at their fair value with changes in fair value recorded to the consolidated income statements. The fair value adjustments for hedging type derivatives are recorded in revenue. Fair value adjustments for embedded derivatives are recorded within net finance expense.

On May 7, 2020, the Company entered into an agreement and received $115,005 in exchange for the delivery of 79,954 gold ounces starting January 2022 and ending in December 2023, which were valued at gold forward curve prices averaging $1,682 per ounce at the time of the transaction. The agreement has been assessed as a financial liability that has been designated as fair value through profit or loss within change in fair value of financial instruments, with a component of the fair value related to the fluctuation in the Company's own credit risk being recorded to other comprehensive income. The fair value adjustment recorded in profit or loss and other comprehensive income for the year ended December 31, 2020 totaled loss of $22,026.

Other financial liabilities at amortized cost relate to agreements with communities near the Constancia operation which allow Hudbay to extract minerals over the useful life of the Constancia operation, carry out exploration and evaluation activities in the area and provide Hudbay with community support to operate in the region. The changes in other financial liabilities at amortized cost during the year ended December 31, 2020 primarily relates to changes in estimated community payments arising from the execution of the Pampacancha surface rights agreement and individual land user agreements with certain community members, partially offset by disbursements.

The following table summarizes changes in other financial liabilities at amortized cost:

Balance, January 1, 2019	$	21,361
Net additions		7,369
Disbursements		(6,351	)
Accretion		1,222
Effects of changes in foreign exchange		399
Balance, December 31, 2019	$	24,000
Net additions		116,233
Disbursements		(98,375	)
Accretion		3,641
Effects of changes in foreign exchange		(4,712	)
Balance, December 31, 2020	$	40,787

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Lease Liability

12 Months Ended

Dec. 31, 2020

Lease liabilities [abstract]

Lease Liability [Text Block]

16. Lease Liability

Balance, January 1, 2019	$	89,215
Additional capitalized leases (note 12)		22,158
Lease payments		(32,952	)
Accretion and other movements		3,526
Balance, December 31, 2019	$	81,947
Additional capitalized leases (note 12)		17,759
Lease payments		(35,980	)
Accretion and other movements		(212	)
Balance, December 31, 2020	$	63,514

 

		Dec. 31, 2020		Dec. 31, 2019
Current	$	33,473	$	32,781
Non-current		30,041		49,166
	$	63,514	$	81,947

Hudbay has entered into leases for its Peru, Manitoba and Arizona business units which expire between 2020 and 2043. The interest rates on leases which were capitalized have interest rates between 1.95% to 5.44%, per annum. The range of interest rates utilized for discounting varies depending mostly on the Hudbay entity acting as lessee and duration of the lease. For certain leases, Hudbay has the option to purchase the equipment and vehicles leased at the end of the terms of the leases. Hudbay's obligations under these leases are secured by the lessor's title to the leased assets. The present value of applicable lease payments has been recognized as a ROU asset, which was included as a non-cash addition to property, plant and equipment, and a corresponding amount as a lease liability.

There are no restrictions placed on Hudbay by entering into these leases.

The following outlines expenses recognized within the Company's consolidated income statements for the periods ended December 31, 2020 and December 31, 2019, relating to leases for which a recognition exemption was applied.

		Year ended December 31,
		2020		2019
Short-term leases	$	40,253	$	45,745
Low value leases		353		92
Variable leases		57,389		56,152
Total	$	97,995	$	101,989

Payments made for short term, low value and variable leases would mostly be captured as expenses in the  consolidated income statements, however, certain amounts may be capitalized to PP&E for the Arizona business unit during its development phase and certain amounts may be reported in inventories given the timing of sales. Variable consideration leases include equipment used for heavy civil works at Constancia.

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Long-term debt

12 Months Ended

Dec. 31, 2020

Disclosure of detailed information about borrowings [abstract]

Long-term debt [text block]

17. Long-term debt

Long-term debt is comprised of the following:

		Dec. 31, 2020			Dec. 31, 2019
Senior unsecured notes (a)	$	1,139,695		$	991,558
Less: Unamortized transaction costs - revolving credit facilities (b)		(4,020	)		(6,303	)
	$	1,135,675		$	985,255

(a) Senior unsecured notes

Balance, January 1, 2019	$	989,306
Change in fair value of embedded derivative (prepayment option)		1,079
Accretion of transaction costs and premiums		1,173
Balance, December 31, 2019	$	991,558
Addition to Principal, net of $8,176 transaction costs		591,824
Principal repayments		(400,000	)
Change in fair value of embedded derivative (prepayment option)		(47,169	)
Write-down of unamortized transaction costs		2,315
Accretion of transaction costs and premiums		1,167
Balance, December 31, 2020	$	1,139,695

On September 23, 2020, Hudbay completed an offering of $600,000 aggregate principal amount of 6.125% senior unsecured notes due April 2029 (the "2029 Notes").

Hudbay used the proceeds of the offering to satisfy and discharge all of its obligations with respect to its then outstanding $400,000 aggregate principal amount of 7.25% senior unsecured notes due 2023 (the "2023 Notes").

The unamortized transaction costs of $2,315 were expensed upon extinguishment of the 2023 Notes. The early redemption of these notes resulted in a charge of $7,252, which was recorded on the consolidated income statement (note 6g).

As at December 31, 2020, $1,200,000 aggregate principal amount of senior notes were outstanding in two series: (i) a series of 7.625% senior notes due 2025 in an aggregate principal amount of $600,000 and (ii) a series of 6.125% senior notes due 2029 in an aggregate principal amount of $600,000.

The senior notes are guaranteed on a senior unsecured basis by substantially all of the Company's subsidiaries, other than HudBay (BVI) Inc. and certain excluded subsidiaries, which include the Company's subsidiaries that own an interest in the Rosemont project and any newly formed or acquired subsidiaries that primarily hold or may develop non-producing mineral assets that are in the pre-construction phase of development. Hudbay's revolving credit facilities are secured against substantially all of the Company's assets, other than those associated with the Arizona business unit.

(b) Unamortized transaction costs - revolving credit facilities

Balance, January 1, 2019	$	8,276
Accretion of transaction costs		(2,342	)
Transaction costs		369
Balance, December 31, 2019	$	6,303
Accretion of transaction costs		(3,062	)
Write-down of unamortized transaction costs		(1,502	)
Transaction costs		2,281
Balance, December 31, 2020 1	$	4,020
1 Balance, representing deferred transaction costs, is in an asset position.

On August 31, 2020, Hudbay completed a restructuring of its two senior secured credit facilities. The total available credit has been reduced from $550,000 to $400,000 and various financial covenants have been amended.

The unamortized transaction costs of $1,502 were expensed upon restructuring of the credit facilities.

As at December 31, 2020, the Peru business unit had $24,796 in letters of credit issued under the Peru revolving credit facility to support its reclamation obligations and the Manitoba business unit had $90,295 in letters of credit issued under the Canada revolving credit facility to support its reclamation and pension obligations. As at December 31, 2020, there were no cash advances under the credit facilities.

Surety bonds

The Arizona business unit had $8,591 in surety bonds and the Peru business unit had $20,000 in surety bonds, issued to support future reclamation and closure obligations. No cash collateral is required to be posted under these surety bonds.

Other letters of credit

The Peru business unit had $45,000 in letters of credit issued with various Peruvian financial institutions. No cash collateral is required to be posted under these letters of credit.

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Deferred revenue

12 Months Ended

Dec. 31, 2020

Disclosure Of Deferred Revenue [Abstract]

Deferred revenue [Text Block]

18. Deferred revenue

On August 8, 2012 and November 4, 2013, Hudbay entered into precious metals stream transactions with Wheaton whereby Hudbay has received aggregate deposit payments of $455,100 against delivery of (i) 100% of payable gold and silver from the 777 mine until the end of 2016, and delivery of 50% of payable gold and 100% of payable silver for the remainder of the 777 mine life; and aggregate deposit payments of $429,900 against the delivery of (ii) 100% of payable silver and 50% of payable gold from the Constancia mine.

In addition to the aggregate deposit payments of $885,000, as gold and silver is delivered under the stream agreements, Hudbay receives cash payments equal to the lesser of (i) the market price and (ii) $400 per ounce (for gold) and $5.90 per ounce (for silver), subject to 1% annual escalation after three years, from the inception of the agreement.

Hudbay recorded the deposits received as deferred revenue and recognizes amounts in revenue as gold and silver are delivered under the stream agreements. Hudbay determines the amortization of deferred revenue to the consolidated income statements on a per unit basis using the estimated total number of gold and silver ounces expected to be delivered under the stream agreements over the life of the 777 and Constancia life-of-mine plans. During the third quarter of 2020, Hudbay revised its estimate of remaining mineralization for the 777 deposit and as such adjusted the drawdown rates for the remainder of the year. For the year ended December 31, 2020  the drawdown rates for the 777 stream agreement for gold and silver were $1,173 and $22.43 per ounce, respectively (year ended December 31, 2019 - $1,177 and $22.51 per ounce, respectively). For the year ended December 31, 2020 the drawdown rates for the Constancia stream agreement for gold and silver were $976 and $21.52 per ounce, respectively (year ended December 31, 2019 - $948 and $21.77 per ounce, respectively). Hudbay estimates the current portion of deferred revenue based on deliveries anticipated over the next twelve months.

Hudbay has determined that precious metals stream contracts are subject to variable consideration and contain a significant financing component. As such, the Company recognizes a financing charge at each reporting period and will gross up the deferred revenue balance to recognize the significant financing element that is part of these contracts. Hudbay's streaming arrangements are secured against the mining properties and other business unit assets associated with the applicable stream.

Hudbay expects that the remaining performance obligations for the 777 and Constancia streams will be settled by the expiry of their respective stream agreements, which is no earlier than 2052.

As part of the streaming agreement for the 777 mine, Hudbay must repay, with precious metals credits, the legal deposit provided by August 1, 2052, the expiry date of the agreement. If the legal deposit is not fully repaid with precious metals credits from 777 production by the expiry date, a cash payment for the remaining amount will be due at the expiry date of the agreement. Given the mineral reserve and resources of the 777 mine and the current mine plan, there is a possibility that an amount of the legal deposit may not be repaid by means of 777 mine's precious metals credits over its expected remaining mine life. As at December 31, 2020, this prepayment amount does not meet the definition of a financial liability. Hudbay incorporates the possibility of repayment as part of its assessment of variable consideration in recognizing the amount of deferred revenue to recognize in income.

The following table summarizes changes in deferred revenue:

Balance, January 1, 2019	$	566,078
Amortization of deferred revenue
Liability drawdown		(92,398	)
Variable consideration adjustments - prior periods		16,295
Accretion on streaming arrangements
Current year additions		63,725
Variable consideration adjustments - prior periods		6,047
Effects of changes in foreign exchange		4,009
Balance, December 31, 2019	$	563,756
Amortization of deferred revenue
Liability drawdown		(67,263	)
Variable consideration adjustments - prior periods		(6,668	)
Accretion on streaming arrangements (note 6g)
Current year additions		60,362
Variable consideration adjustments - prior periods		(3,692	)
Effects of changes in foreign exchange		189
Balance, December 31, 2020	$	546,684

     Consideration from the Company's stream agreement is considered variable. Gold and silver stream revenue can be subject to cumulative adjustments when the number of ounces to be delivered under the contract changes. As a result of changes in the Company's mineral reserve and resource estimate in the first quarter of 2020 and amendments made to the 777 mine plan in the third quarter of 2020, the amortization rate by which deferred revenue is drawn down into income was adjusted and, as required, a current period catch up adjustment is made for all prior period stream revenues since the stream agreement inception date. This variable consideration adjustment resulted in an increase in revenue of $6,668 and reversal of finance expense of $3,692 for the year ended December 31, 2020 (December 31, 2019 - revenue reversal of $16,295 and additional finance expense $6,047).

    During the year ended December 31, 2020, the Company recognized an adjustment to gold and silver revenue and finance costs due to a net increase in the Company's mineral reserve and resources estimates coupled with a change to the 777 mine plan. During the year ended December 31, 2019 the Company recognized an adjustment to gold and silver revenue and finance costs.

Deferred revenue is reflected in the consolidated balance sheets as follows:

		Dec. 31, 2020		Dec. 31, 2019
Current	$	102,782	$	86,933
Non-current		443,902		476,823
	$	546,684	$	563,756

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Provisions

12 Months Ended

Dec. 31, 2020

Disclosure of other provisions [abstract]

Provisions [Text Block]

19.    Provisions

		Decommis- sioning, restoration and similar liabilities			Deferred share units (note 24a)			Restricted share units1 (note 24a)			Performan- ce share units (note 24a)		Other			Total
Balance, January 1, 2020	$	302,116		$	3,876		$	5,477		$	—	$	2,956		$	314,425
Net additional provisions made		5,868			1,628			3,642			1,257		15			12,410
Amounts used		(18,737	)		(497	)		(2,646	)		—		(1,824	)		(23,704	)
Unwinding of discount (note 6g)		3,543			—			—			—		—			3,543
Effect of change in discount rate		43,180			—			—			—		—			43,180
Effect of foreign exchange		7,162			191			116			43		(3	)		7,509
Effect of change in share price		—			3,521			3,860			730		—			8,111
Balance, December 31, 2020	$	343,132		$	8,719		$	10,449		$	2,030	$	1,144		$	365,474

¹ Certain amounts relating to the Arizona segment are capitalized.

Provisions are reflected in the consolidated balance sheets as follows:

December 31, 2020		Decommis-sioning, restoration and similar liabilities		Deferred share units (note 24a)		Restricted share units1 (note 24a)		Performance share units (note 24a)		Other		Total
Current (note 14)	$	20,308	$	8,719	$	4,648	$	—	$	—	$	33,675
Non-current		322,824		—		5,801		2,030		1,144		331,799
	$	343,132	$	8,719	$	10,449	$	2,030	$	1,144	$	365,474

		Decommis-sioning, restoration and similar liabilities			Deferred share units (note 24a)			Restricted share units1 (note 24a)			Performance share units (note 24a)		Other			Total
Balance, January 1, 2019	$	202,024		$	4,288		$	12,201		$	—	$	411		$	218,924
Net additional provisions made		68,881			1,479			2,885			—		2,882			76,127
Amounts used		(4,136	)		(1,668	)		(9,380	)		—		(341	)		(15,525	)
Unwinding of discount (note 6g)		4,392			—			—			—		—			4,392
Effect of change in discount rate		23,635			—			—			—		—			23,635
Effect of foreign exchange		7,320			99			225			—		4			7,648
Effect of change in share price		—			(322	)		(454	)		—		—			(776	)
Balance, December 31, 2019	$	302,116		$	3,876		$	5,477		$	—	$	2,956		$	314,425

¹ Certain amounts relating to the Arizona segment are capitalized.

December 31, 2019		Decommis- sioning, restoration and similar liabilities		Deferred share units (note 24a)		Restricted share units1 (note 24a)		Performan- ce share units (note 24a)		Other		Total
Current (note 14)	$	23,621	$	3,876	$	4,468	$	—	$	1,610	$	33,575
Non-current		278,495		—		1,009		—		1,346		280,850
	$	302,116	$	3,876	$	5,477	$	—	$	2,956	$	314,425

Decommissioning, restoration and similar liabilities are remeasured at each reporting date to reflect changes in discount rates, which can significantly affect the liabilities.

Decommissioning, restoration and similar liabilities

Hudbay's decommissioning, restoration and similar liabilities relate to the rehabilitation and closure of currently operating mines and metallurgical plants, development-phase properties and closed properties. The amount of the provision has been recorded based on estimates and assumptions that management believes are reasonable; however, actual decommissioning and restoration costs may differ from expectations.

During the year ended December 31, 2020, additional provisions were recognized mostly as a result of lower discount rates and increased cost in Peru and Manitoba as well as additional disturbance in Peru.

During 2019, additional provisions were recognized as a result of higher estimates for closure activities of tailings facilities at the Manitoba operations to ensure compliance with higher industry-wide standards for tailings management safety and, to a lesser extent, increased mine activity footprints and the resulting higher disturbance at the Constancia operation.

Hudbay's decommissioning and restoration liabilities relate mainly to its Manitoba operations. Management anticipates that the assets in Flin Flon will be placed on care and maintenance once mining activities are completed at 777 mine in order to maintain optionality for restart should a new mine be found in the Flin Flon area. The majority of closure activities will occur once all mining activities in Manitoba are completed. These provisions also reflect estimated post-closure cash flows that extend to the year 2100 for ongoing monitoring and water treatment requirements. Management anticipates most decommissioning and restoration activities for the Constancia operation will occur from 2035 to 2070, which include ongoing monitoring and water treatment requirements.

These estimates have been discounted to their present value at rates ranging from 0.12% to 1.65% per annum (2019 - 1.59% to 2.39%), using pre-tax risk-free interest rates that reflect the estimated maturity of each specific liability.

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Pension obligations

12 Months Ended

Dec. 31, 2020

Pension Obligations [Abstract]

Pension obligations [Text Block]

20. Pension obligations

Hudbay maintains non-contributory and contributory defined benefit pension plans for certain of its employees.

The Company uses a December 31 measurement date for all of its plans. For Hudbay's significant plans, the most recent actuarial valuations filed for funding purposes were performed during 2020 using data as at December 31, 2019. For these plans, the next actuarial valuation required for funding purposes will be performed during 2021 using data as of December 31, 2020.

Movements in the present value of the defined benefit obligation in the current and previous years were as follows:

		Year ended
		Dec. 31, 2020			Dec. 31, 2019
Opening defined benefit obligation:	$	243,733		$	211,512
Current service costs		11,044			9,880
Interest cost		6,569			7,156
Benefits paid from plan		(35,384	)		(16,745	)
Benefits paid from employer		(1,317	)		(934	)
Participant contributions		48			64
Effects of movements in exchange rates		2,780			11,660
Remeasurement actuarial (gains)/losses:
Arising from changes in demographic assumptions		(1,461	)		—
Arising from changes in financial assumptions		16,967			29,609
Arising from experience adjustments		(2,625	)		(2,258	)
Settlement payments from plan assets		—			(6,307	)
Loss on settlement		—			96
Closing defined benefit obligation	$	240,354		$	243,733

The defined benefit obligation closing balance, by member group, is as follows:

		Dec. 31, 2020		Dec. 31, 2019
Active members	$	211,861	$	231,959
Deferred members		2,198		1,555
Retired members		26,295		10,219
Closing defined benefit obligation	$	240,354	$	243,733

Movements in the fair value of the pension plan assets in the current and previous years were as follows:

		Year ended
		Dec. 31, 2020		Dec. 31, 2019
Opening fair value of plan assets:	$	202,119		$	175,795
Interest income		5,695			6,170
Remeasurement adjustment:
Return on plan assets (excluding amounts included in net interest expense)		15,377			21,460
Contributions from the employer		12,987			11,952
Employer direct benefit payments		1,317			934
Contributions from plan participants		48			64
Benefit payment from employer		(1,317	)		(934	)
Administrative expenses paid from plan assets		(77	)		(82	)
Benefits paid		(35,384	)		(16,745	)
Settlement payments from plan assets		—			(6,307	)
Effects of changes in foreign exchange rates		2,721			9,812
Closing fair value of plan assets	$	203,486		$	202,119

The amount included in the consolidated balance sheets arising from the entity's obligation in respect of its defined benefit plans is as follows:

		Dec. 31, 2020			Dec. 31, 2019
Present value of funded defined benefit obligation	$	220,210		$	224,364
Fair value of plan assets		(203,486	)		(202,119	)
Present value of unfunded defined benefit obligation		20,144			19,369
Net liability arising from defined benefit obligation	$	36,868		$	41,614

Reflected in the consolidated balance sheets as follows:

		Dec. 31, 2020		Dec. 31, 2019
Pension obligation - current (note 14)	$	13,552	$	12,015
Pension obligation - non-current		23,316		29,599
Total pension obligation	$	36,868	$	41,614

Pension expense is as follows:

		Dec. 31, 2020		Dec. 31, 2019
Service costs:
Current service cost	$	11,044	$	9,880
Loss on settlement		—		96
Total service cost		11,044		9,976
Net interest expense		874		986
Administration cost		77		82
Defined benefit pension expense	$	11,995	$	11,044
Defined contribution pension expense	$	1,791	$	1,639

Remeasurement on the net defined benefit liability:

		Dec. 31, 2020			Dec. 31, 2019
Return on plan assets (excluding amounts included in net interest expense)	$	(15,377	)	$	(21,460	)
Actuarial gains arising from changes in demographic assumptions		(1,461	)		—
Actuarial losses arising from changes in financial assumptions		16,967			29,609
Actuarial gains arising from experience adjustments		(2,625	)		(2,258	)
Defined benefit (gain)/loss related to remeasurement	$	(2,496	)	$	5,891
Total pension cost	$	11,290		$	18,574

Pension amounts recognized include those directly related to production of inventory; such amounts are recognized initially as costs of inventory and are expensed in the consolidated income statements within cost of sales upon sale of the inventory.

The current service cost, the interest cost and administration cost for the year are included in the employee benefits expense. The remeasurement of the net defined benefit liability is included in OCI.

The defined benefit pension plans typically expose Hudbay to actuarial risks such as: investment risk, interest rate risk, longevity risk and salary risk.

Investment risk	The present value of the liabilities for the defined benefit plans is calculated using a discount rate determined by reference to high quality corporate bond yields; if the return on plan assets is below this rate, it will create a plan deficit. Hudbay's primary quantitative investment objectives are maximization of the long term real rate of return, subject to an acceptable degree of investment risk and preservation of principal. Risk tolerance is established through consideration of several factors including past performance, current market condition and the funded status of the plan.
Interest risk	A decrease in the bond interest rate will increase the pension plan liabilities; however, this will be partially offset by an increase in the return on the plan's debt investments.
Longevity risk	The present value of the defined benefit plans liabilities is calculated by reference to the best estimate of the mortality of plan participants both during and after their employment. An increase in the life expectancy of the plan participants will increase the pension plans liabilities.
Salary risk	The present value of the defined benefit plans liabilities for some of the pension plans is calculated by reference to the future salaries of plan participants. As such, an increase in the salary of the plan participants will increase the plans' liabilities.

The principal assumptions used for the purposes of the actuarial valuations were as follows:

	2020		2019
Defined benefit cost:
Discount rate - benefit obligations	3.08	%	3.73	%
Discount rate - service cost	3.10	%	3.75	%
Expected rate of salary increase1	2.75	%	2.75	%
Average longevity at retirement age for current pensioners (years)2 :
Males	21.2		21.1
Females	23.9		23.9
Defined benefit obligation:
Discount rate	2.54	%	3.08	%
Expected rate of salary increase1	2.75	%	2.75	%
Average longevity at retirement age for current pensioners (years)2 :
Males	20.3		21.2
Females	23.7		23.9
Average longevity at retirement age for current employees (future pensioners) (years)2 :
Males	22.2		23.0
Females	25.4		25.6
1 Plus merit and promotional scale based on member's age
2 CPM2014 Priv with CPM-B projection scale.

 

Hudbay reviews the assumptions used to measure pension costs (including the discount rate) on an annual basis. Economic and market conditions at the measurement date affect these assumptions from year to year. In determining the discount rate, Hudbay considers the duration of the pension plan liabilities.

Significant actuarial assumptions for the determination of the defined benefit obligation are discount rate, expected salary increase and mortality. The sensitivity analysis below has been determined based on reasonably possible changes of the respective assumptions occurring at the end of the reporting periods, while holding other assumptions constant:

— If the discount rate is 50 basis points higher (lower), the defined benefit obligation would decrease by $22,846 (increase by $26,250).

— If the expected salary growth increases (decreases) by 1%, the defined benefit obligation would increase by $3,526 (decrease $3,158).

—  If the life expectancy increases (decreases) by one year for both men and women, the defined benefit obligation would increase by $2,978 (decrease by $3,039).

The sensitivity analysis presented above may not be representative of the actual change in the defined benefit obligation as it is unlikely that the change in assumptions would occur in isolation of one another as some of the assumptions may be correlated.

Furthermore, in presenting the above sensitivity analysis, the present value of the defined benefit obligation has been calculated using the projected unit credit method at the end of the reporting period, which is the same as that applied in calculating the defined benefit obligation liability recognized in the consolidated balance sheets.

The Company's main pension plans are registered federally with the Office of the Superintendent of Financial Institution and with the Canada Revenue Agency. The registered pension plans are governed in accordance with the Pension Benefits Standards Act and the Income Tax Act. The sponsor contributes the amount needed to maintain adequate funding as dictated by the prevailing regulations.

Expected employer contribution to the pension plans for the fiscal year ending December 31, 2021 is $12,437.

The average duration of the pension obligation at December 31, 2020 is 21.2 years (2019 - 19.3 years). This number can be broken down as follows:

—  Active members: 22.3 years (2019: 19.7 years)

— Deferred members: 21.9 years (2019: 22.0 years)

— Retired members: 12.0 years (2019: 10.5 years)

Asset-Liability-Matching studies are performed periodically to analyze the investment policies in terms of risk and-return profiles.

The actual return on plan assets in 2020 was 10.8% (2019: 15.1%).

The pension plans do not invest directly in either securities or property/real estate of the Company.

With the exception of fixed income investments and certain equity instruments, the plan assets are actively managed by investment managers, with the goal of attaining returns that potentially outperform passively managed investments. Within appropriate limits, the actual composition of the invested funds may vary from the prescribed investment mix.

The following is a summary of the fair value classification levels for investment:

December 31, 2020		Level 1		Level 2		Level 3		Total
Investments:
Money market instruments	$	4,766	$	—	$	—	$	4,766
Pooled equity funds		68,926		—		—		68,926
Pooled fixed income funds		—		98,922		—		98,922
Alternative investment funds		—		30,323		—		30,323
Balanced funds		—		549		—		549
	$	73,692	$	129,794	$	—	$	203,486

December 31, 2019		Level 1		Level 2		Level 3		Total
Investments:
Money market instruments	$	1,588	$	—	$	—	$	1,588
Pooled equity funds		76,680		—		—		76,680
Pooled fixed income funds		—		103,646		—		103,646
Alternative investment funds		—		19,438		—		19,438
Balanced funds		—		767		—		767
	$	78,268	$	123,851	$	—	$	202,119

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Other employee benefits

12 Months Ended

Dec. 31, 2020

Other Employee Benefits [Abstract]

Other employee benefits [Text Block]

21. Other employee benefits

Hudbay sponsors both other long-term employee benefit plans and non-pension post-employment benefits plans and uses a December 31 measurement date. These obligations relate mainly to commitments for post-retirement health benefits. Information about Hudbay's post-employment and other long-term employee benefits is as follows:

Movements in the present value of the defined benefit obligation in the current and previous years were:

		Year ended
		Dec. 31, 2020			Dec. 31, 2019
Opening defined benefit obligation	$	116,696		$	93,528
Current service cost1		4,140			3,060
Past service cost		—			—
Interest cost		3,478			3,600
Effects of movements in exchange rates		2,423			4,864
Remeasurement actuarial (gains)/losses:
Arising from changes in demographic assumptions		(4,460	)		—
Arising from changes in financial assumptions		10,043			14,094
Arising from experience adjustments		(489	)		87
Benefits paid		(2,215	)		(2,537	)
Closing defined benefit obligation	$	129,616		$	116,696

¹ Includes remeasurement of other long term employee benefits

The defined benefit obligation closing balance, by group member, is as follows:

		Dec. 31, 2020		Dec. 31, 2019
Active members	$	68,983	$	60,801
Inactive members		60,633		55,895
Closing defined benefit obligation	$	129,616	$	116,696

Movements in the fair value of defined benefit amounts in the current and previous years were as follows:

		Dec. 31, 2020			Dec. 31, 2019
Employer contributions	$	2,215		$	2,537
Benefits paid		(2,215	)		(2,537	)
Closing fair value of assets	$	—		$	—

The non-pension employee benefit plan obligations are unfunded.

Reconciliation of assets and liabilities recognized in the consolidated balance sheets:

		Dec. 31, 2020		Dec. 31, 2019
Unfunded benefit obligation	$	129,616	$	116,696
Vacation accrual and other - non-current		3,046		2,888
Net liability	$	132,662	$	119,584

Reflected in the consolidated balance sheets as follows:

		Dec. 31, 2020		Dec. 31, 2019
Other employee benefits liability - current (note 14)	$	3,154	$	2,806
Other employee benefits liability - non-current		129,508		116,778
Net liability	$	132,662	$	119,584

Other employee future benefit expense includes the following:

		Dec. 31, 2020		Dec. 31, 2019
Current service cost 1	$	4,140	$	3,060
Net interest cost		3,478		3,600
Components recognized in consolidated income statements	$	7,618	$	6,660

¹ Includes remeasurement of other long term employee benefit

		Dec. 31, 2020			Dec. 31, 2019
Remeasurement on the net defined benefit liability:
Actuarial gains arising from changes in demographic assumptions	$	(4,460	)	$	—
Actuarial losses arising from changes in financial assumptions		10,043			14,094
Actuarial (gains)/losses arising from changes experience adjustments		(489	)		87
Components recognized in statements of comprehensive income	$	5,094		$	14,181

 

Total other employee future benefit cost $ 12,712 $ 20,841

Other employee benefit amounts recognized include those directly related to production of inventory; such

amounts are recognized initially as costs of inventory and are expensed in the consolidated income

statements within cost of sales upon sale of the inventory.

	Dec. 31, 2020	Dec. 31, 2019
Defined benefit cost:
Discount rate	3.17 %	3.88 %
Initial weighted average health care trend rate	5.68 %	5.74 %
Ultimate weighted average health care trend rate	4.00 %	4.00 %
Average longevity at retirement age for current pensioners (years)1 :
Males	21.2	21.1
Females	23.9	23.9

 

	Dec. 31, 2020		Dec. 31, 2019
Defined benefit obligation:
Discount rate	2.76	%	3.17	%
Initial weighted average health care trend rate	5.66	%	5.68	%
Ultimate weighted average health care trend rate	4.00	%	4.00	%
Average longevity at retirement age for current pensioners (years)1 :
Males	20.3		21.2
Females	23.7		23.9
Average longevity at retirement age for current employees (future pensioners) (years)1 :
Males	22.2		23.1
Females	25.4		25.6

¹ CPM2014 Priv with CPM-B projection scale

Hudbay reviews the assumptions used to measure other employee benefit costs (including the discount rate) on an annual basis.

The other employee benefit costs typically expose Hudbay to actuarial risks such as: interest rate risk, health care cost inflation risk and longevity risk.

Interest risk	A decrease in the bond interest rate will increase the plan liabilities.
Health care cost inflation risk	The majority of the plan's benefit obligations are linked to health care cost inflation and higher inflation will lead to higher liabilities.
Longevity risk	The majority of the plans' benefit liability is calculated by reference to the best estimate of the mortality of plan participants both during and after their employment. An increase in the life expectancy of the plan participants will increase the plans liabilities. This is particularly significant for benefits subject to health care cost inflation where increases in inflation result in higher sensitivity to changes in life expectancy.

The sensitivity analyses below have been determined based on reasonably possible changes of the respective assumptions occurring at the end of the reporting period, while holding other assumptions constant:

— If the discount rate is 50 basis points higher (lower), the defined benefit obligation would decrease by $11,585 (increase by $13,392).

— If the health care cost assumption increases (decreases) by 1%, the defined benefit obligation would increase by $27,392 (decrease by $21,023).

— If the life expectancy increases (decreases) by one year for both men and women, the defined benefit obligations would increase by $5,553 (decrease by $5,645).

The average duration of the non-pension post-employment obligation at December 31, 2020 is 19.4 years (2019: 19.6 years).

This number can be broken down as follows:

— Active members: 24.6 years (2019: 24.9 years)

— Inactive members: 13.6 years (2019: 13.9 years)

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Income and mining taxes

12 Months Ended

Dec. 31, 2020

Major components of tax expense (income) [abstract]

Income and mining taxes [Text Block]

22.     Income and mining taxes

(a)Tax recoveries:

The tax expense (recoveries) is applicable as follows:

		Year ended December 31,
		2020			2019
Current:
Income taxes	$	4,458		$	24,919
Mining taxes		4,671			4,720
Adjustments in respect of prior years		(398	)		6,273
		8,731			35,912
Deferred:
Income tax recoveries - origination, revaluation and/or reversal of temporary differences		(39,411	)		(133,468	)
Mining tax recoveries - origination, revaluation and/or reversal of temporary difference		(3,331	)		(12,214	)
Adjustments in respect of prior years		(494	)		817
		(43,236	)		(144,865	)
	$	(34,505	)	$	(108,953	)

Adjustments in respect of prior years refers to amounts changing due to the filing of tax returns and assessments from government authorities.

(b) Deferred tax assets and liabilities as represented on the consolidated balance sheets:

		Dec. 31, 2020			Dec. 31, 2019
Deferred income tax asset	$	94,070		$	69,950
Deferred mining tax asset		7,829			5,096
		101,899			75,046
Deferred income tax liability		(220,568	)		(233,218	)
Deferred mining tax liability		(8,865	)		(9,710	)
		(229,433	)		(242,928	)
Net deferred tax liability balance, end of year	$	(127,534	)	$	(167,882	)

(c) Changes in deferred tax assets and liabilities: 

		Year ended Dec. 31, 2020			Year ended Dec. 31, 2019
Net deferred tax liability balance, beginning of year	$	(167,882	)	$	(308,577	)
Deferred tax recovery		43,236			144,865
OCI transactions		(759	)		1,878
Foreign currency translation on the deferred tax liability		(2,129	)		(6,048	)
Net deferred tax liability balance, end of year	$	(127,534	)	$	(167,882	)

(d) Reconciliation to statutory tax rate:

As a result of its mining operations, the Company is subject to both income and mining taxes. Generally, most expenditures incurred are deductible in computing income tax, whereas mining tax legislation, although based on a measure of profitability from carrying on mining operations, is more restrictive in respect of the deductions permitted in computing income subject to mining tax. These restrictions include costs unrelated to mining operations as well as deductions for financing expenses, such as interest and royalties. In addition, income unrelated to carrying on mining operations is not subject to mining tax.

A reconciliation between tax expense and the product of accounting profit multiplied by the Company's statutory income tax rate for the years ended December 31, 2020 and 2019 is as follows:

		Year ended December 31,
		2020			2019
Statutory tax rate		26.3	%		27.0	%
Tax recovery at statutory rate	$	(47,047	)	$	(122,246	)
Effect of:
Deductions related to mining taxes		(1,369	)		(1,493	)
Adjusted income taxes		(48,416	)		(123,739	)
Mining tax expense (recovery)		1,291			(6,674	)
		(47,125	)		(130,413	)
Permanent differences related to:
Capital items		(160	)		3,270
Other income tax permanent differences		(1,165	)		1,747
Impact of remeasurement on decommissioning liability		7,094			(12,018	)
Temporary income tax differences not recognized		(1,827	)		(351	)
Other temporary income tax differences not recognized		2,927			2,323
Non-deductible impairment on UCM receivable		—			7,041
Withholding tax on dividends		—			6,826
Impact related to differences in tax rates in foreign operations		5,534			20,338
Impact of changes to statutory tax rates		2,412			(259	)
Foreign exchange on non-monetary items		(3,628	)		(6,633	)
Impact related to tax assessments and tax return amendments		1,433			(824	)
Tax recovery	$	(34,505	)	$	(108,953	)

A decrease in the statutory tax rate in 2020 mainly reflects a reduction in the Canadian statutory tax rate which is the result of the changes to the relevant provincial allocation factors based on income earned and expenses incurred in different Canadian jurisdictions.

(e)  Income tax effect of temporary differences - recognized:

The tax effects of temporary differences that give rise to significant portions of the deferred tax assets and deferred tax liabilities at December 31, 2020 and 2019 are as follows:

		Balance sheet						Income Statement
		Dec. 31, 2020			Dec. 31, 2019			Dec. 31, 2020			Dec. 31, 2019
Deferred income tax (liability) asset/expense (recovery)
Property, plant and equipment	$	(88,368	)	$	(96,841	)	$	(8,473	)	$	13,434
Pension obligation		9,467			11,332			1,294			(1,115	)
Other employee benefits		25,687			16,837			(8,850	)		(3,349	)
Decommissioning and restoration obligation		37,902			41,208			3,307			(33,391	)
Non-capital losses		110,374			90,446			(19,928	)		(17,976	)
Share issuance and debt cost		8,972			6,540			(2,768	)		4,361
Embedded derivative (prepayment option)		(13,137	)		(694	)		12,443			245
Deferred revenue		(809	)		(112	)		697			(12,839	)
Other		3,982			1,234			(4,516	)		(7,755	)
Deferred income tax asset / expense (recovery)		94,070			69,950			(26,794	)		(58,385	)
Deferred income tax liability (asset)/ (recovery) expense
Property, plant and equipment		292,858			259,145			33,713			(79,892	)
Other employee benefits		203			(80	)		(176	)		(320	)
Asset retirement obligations		(1,588	)		(833	)		(756	)		85
Non-capital losses		(78,607	)		(28,643	)		(49,965	)		(1,269	)
Other		7,702			3,629			4,073			7,302
Deferred income tax liability/ expense (recovery)		220,568			233,218			(13,111	)		(74,094	)
Deferred income tax liability/ expense (recovery)	$	(126,498	)	$	(163,268	)	$	(39,905	)	$	(132,479	)

The above reconciling items are disclosed at the tax rates that apply in the jurisdiction where they have arisen. 

  (f)    Income tax temporary differences - not recognized:

The Company has not recognized a deferred tax asset in respect of the following deductible income tax temporary differences:                                                                                                                                                                                                                                                               

		Dec. 31, 2020		Dec. 31, 2019
Property, plant and equipment	$	46,718	$	33,269
Capital losses		166,227		159,545
Other employee benefits		51,226		68,866
Asset retirement obligations		193,898		146,679
Non-capital losses		115,902		122,979
Temporary differences not recognized	$	573,971	$	531,338

   

 

The deductible temporary differences excluding non-capital losses do not expire under current tax legislation.

The Canadian non-capital losses were incurred between 2006 and 2020 and expire between 2026 and 2040. Hudbay incurred United States net operating losses between 2004 and 2020 which have a twenty year carry forward period. Peruvian net operating losses were incurred in 2020 which have a four year carry forward period.

   

(g) Mining tax effect of temporary differences:

The tax effects of temporary differences that give rise to significant portions of the deferred mining tax assets and liabilities at December 31, 2020 and 2019 are as follows:

                                            

		Dec. 31, 2020			Dec. 31, 2019
Canada
Property, plant and equipment	$	7,829		$	5,095
		Dec. 31, 2020			Dec. 31, 2019
Peru
Property, plant and equipment	$	(8,865	)	$	(9,710	)

   

   

For the year ended December 31, 2020, Hudbay had unrecognized deferred mining tax assets of approximately $7,544 (December 31, 2019 - $5,361).

(h)  Unrecognized taxable temporary differences associated with investments:

There are no taxable temporary differences associated with investments in subsidiaries, associates and joint ventures, for which a deferred tax liability has not been recognized.

(i)     Taxes receivable/payable:

The timing of payments results in significant variances in period-to-period comparisons of the tax receivable and tax payable balances.

(j)     Other disclosure:

The tax rules and regulations applicable to mining companies are highly complex and subject to interpretation. The Company may be subject in the future to a review of its historic income and other tax filings and, in connection with such reviews, disputes can arise with tax authorities over the interpretation or application of certain tax rules and regulations in respect of the Company's business. These reviews may alter the timing or amount of taxable income or deductions. The amount ultimately reassessed upon resolution of issues raised may differ from the amount accrued.

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Share capital

12 Months Ended

Dec. 31, 2020

Disclosure of classes of share capital [abstract]

Share capital [Text Block]

23. Share capital

(a) Preference shares:

Authorized: Unlimited preference shares without par value.

Issued and fully paid: Nil.

(b) Common shares:

Authorized: Unlimited common shares without par value.

Issued and fully paid:

	Year ended December 31, 2020			Year ended Dec. 31, 2019
	Common shares		Amount	Common shares		Amount
Beginning and end of year	261,272,151	$	1,777,340	261,272,151	$	1,777,340

During the year ended December 31, 2020, the Company declared two semi-annual dividends of C$0.01 per share each. The Company paid $1,804 and $1,979 in dividends on March 27, 2020 and September 25, 2020 to shareholders of record as of March 10, 2020 and September 4, 2020.

During the year ended December 31, 2019, the Company paid $1,955 and $1,972 in dividends on March 29, 2019 and September 27, 2019 to shareholders of record as of March 8, 2019 and September 6, 2019.

The Company declared a semi-annual dividend of C$0.01 per share on February 18, 2021. The dividend will be paid on March 26, 2021 to shareholders of record as of March 9, 2021 and is expected to total C$2,613.

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Share-based compensation

12 Months Ended

Dec. 31, 2020

Disclosure of terms and conditions of share-based payment arrangement [abstract]

Share-based compensation [Text Block]

24. Share-based compensation

(a) Cash-settled share-based compensation:

Hudbay has three cash-settled share-based compensation plans, as described below.

Deferred Share Units (DSU)

At December 31, 2020, the carrying amount and the intrinsic value of the outstanding liability related to the DSU plan was $8,719 (December 31, 2019 - $3,876) (note 19). The following table outlines information related to DSUs granted, expenses recognized and payments made during the year.

		Year ended
		Dec. 31, 2020		Dec. 31, 2019
Granted during the year:
Number of units		465,889		337,999
Weighted average price (C$/unit)	$	4.10	$	5.89
Expenses recognized during the year1 (notes 6c)	$	5,149	$	1,157
Payments made during the year (note 19)	$	497	$	1,668

¹ This expense relates to the grant of DSUs, as well as mark-to-market adjustments, and is presented within selling and administrative expenses on the consolidated income statements.

Restricted Share Units (RSU)

RSUs granted under the LTEP Plan may be settled in the form of Hudbay common shares or, at the option of the Company, the cash equivalent based on the market price of the common shares as of the vesting date. RSUs may also be granted under Hudbay's Share Unit Plan, however; the RSUs granted under the Share Unit Plan may only be settled in cash. Hudbay has historically settled all RSUs in cash. The Company has determined that the appropriate accounting treatment is to classify the RSUs as cash settled transactions.

At December 31, 2020, the carrying amount of the outstanding liability related to the RSU plan was $10,449 (December 31, 2019 - $5,477) (note 19). The following table outlines information related to RSUs granted, expenses recognized and payments made in the year.             

		Year ended
		Dec. 31, 2020			Dec. 31, 2019
Number of units, beginning of year 1		2,223,999			3,666,867
Number of units granted during the year		1,388,786			1,080,741
Credits for dividends		17,587			7,554
Number of units forfeited during the year		(44,678	)		(573,914	)
Number of units vested		(645,357	)		(1,957,249	)
Number of units, end of year1		2,940,337			2,223,999
Weighted average price - granted (C$/unit)	$	3.98		$	8.98
Expenses recognized during the year2 (note 6c)	$	6,750		$	1,557
Payments made during the year (note 19)	$	2,646		$	9,380

¹ Includes 738,002 and 616,397 units that have vested; however, are unreleased and unpaid as of December 31, 2020 and December 31, 2019, respectively.

² This net expense reflects recognition of RSU expense over the service period, as well as mark-to-market adjustments, and is presented mainly within cost of sales and selling and administrative expenses. Certain amounts related to the Arizona segment are capitalized.

Performance Share Units (PSU)

PSUs granted under the LTEP Plan may be settled in the form of Hudbay common shares or, at the option of the Company, the cash equivalent based on the market price of the common shares as of the vesting date. Hudbay has historically settled similar share-based compensation units in cash. The Company has determined that the appropriate accounting treatment is to classify the PSUs as cash settled transactions.

At December 31, 2020, the carrying amount of the outstanding liability related to PSU plan was $2,030 (December 31, 2019 - $0) (note 19). The following table outlines information related to PSUs granted, expenses recognized and payments made in the year.         

		Year ended
		Dec. 31, 2020		Dec. 31, 2019
Number of units, beginning of year		—		—
Number of units granted during the year		1,089,569		—
Credits for dividends		6,046		—
Number of units, end of year		1,095,615		—
Weighted average price - granted (C$/unit)	$	3.97	$	—
Expenses recognized during the year (note 6c)	$	1,987	$	—
Payments made during the year (note 19)	$	—	$	—

(b) Equity-settled share-based compensation - stock options:

The Company's stock option plan was approved in June 2005 and amended in May 2008 (the "Plan"). Under the amended Plan, the Company may grant to employees, officers, directors or consultants of the Company or its affiliates options to purchase up to a maximum of 13 million common shares of Hudbay. The Company has determined that the appropriate accounting treatment is to classify the stock options as equity settled transactions.

During the year ended December 31, 2020, the Company granted 1,581,385 stock options (year ended December 31, 2019 - nil).

The following table presents the weighted average fair value assumptions used in the Black-Scholes valuation of these options:

For options granted during the year ended		Dec. 31, 2020
Weighted average share price at grant date (CAD)	$	3.77
Risk-free rate		1.14%
Expected dividend yield		0.5%
Expected stock price volatility (based on historical volatility)		57.0%
Expected life of option (months)		84
Weighted average per share fair value of stock options granted (CAD)	$	2.02

During the year ended December 31, 2020, 18,196 stock options were forfeited, which resulted in 1,563,189 options outstanding as of December 31, 2020. There are no stock options outstanding that are exercisable as at December 31, 2020.

Dec. 31, 2020
Range of exercise prices C$	Number of options outstanding	Weighted average remaining contractual life (years)	Weighted average exercise price C$		Number of options exercisable	Weighted average share price at exercise date C$
$3.76 - $3.92	1,563,189	6.16	$	3.77	—	$	—

No options were granted under the Plan during the year ended December 31, 2019.

Hudbay estimates expected life of options and expected volatility based on historical data, which may differ from actual outcomes.

	Year ended				Year ended
	Dec. 31, 2020				Dec. 31, 2019
	Number of shares subject to option			Weighted- average exercise price C$	Number of shares subject to option		Weighted average exercise price C$
Balance, beginning of year	—			—	—	$	—
Number of units granted during the year	1,581,385		$	3.77	—	$	—
Forfeited	(18,196	)	$	3.76	—	$	—
Balance, end of year	1,563,189		$	3.77	—	$	—

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Earnings per share

12 Months Ended

Dec. 31, 2020

Basic earnings per share [abstract]

Earnings per share [Text Block]

25. Earnings per share

	Year ended
	Dec. 31, 2020	Dec. 31, 2019
Basic and diluted weighted average common shares outstanding	261,272,151	261,272,151

The determination of the diluted weighted-average number of common shares excludes the impact of 1,292,840 weighted-average stock options outstanding that were anti-dilutive for the year ended December 31, 2020 (December 31, 2019 - nil).

For periods where Hudbay records a loss, Hudbay calculates diluted loss per share using the basic weighted average number of shares. If the diluted weighted average number of shares were used, the result would be a reduction in the loss, which would be anti-dilutive. For the year ended December 31, 2020 and 2019, Hudbay calculated diluted loss per share using 261,272,151 common shares.

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Capital management

12 Months Ended

Dec. 31, 2020

Statements [Line Items]

Capital management [Text Block]

26. Capital management

The Company's definition of capital includes total equity and long-term debt. Hudbay's long-term debt balance as at December 31, 2020 was $1,135,675 (December 31, 2019 - $985,255).

The Company's objectives when managing capital are to maintain a strong capital base in order to:

— Advance Hudbay's corporate strategies to create long-term value for its stakeholders; and,

— Sustain Hudbay's operations and growth throughout metals and materials cycles.

Hudbay monitors its capital and capital structure on an ongoing basis to ensure they are sufficient to achieve the Company's short-term and long-term strategic objectives in a capital intensive industry. Hudbay faces several risks, including volatile metals prices, access to capital, and risk of delays and cost escalation associated with major capital projects. The Company continually assesses the adequacy of its capital structure to ensure its objectives are met. Hudbay monitors its cash and cash equivalents, which were $439,135 as at December 31, 2020 (2019 - $396,146), together with availability under its committed credit facilities. Hudbay invests its cash and cash equivalents primarily in Canadian bankers' acceptances, deposits at major Canadian and Peruvian banks, or treasury bills issued by the federal or provincial governments. In addition to the requirement to maintain sufficient cash balances to fund continuing operations, Hudbay must maintain sufficient cash to fund the interest expense on the long-term debt outstanding (note 17). As part of the Company's capital management activities, Hudbay monitors interest coverage ratios and leverage ratios.

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Financial instruments

12 Months Ended

Dec. 31, 2020

Disclosure of detailed information about financial instruments [abstract]

Financial instruments [Text Block]

27. Financial instruments

(a)Fair value and carrying value of financial instruments:

The following presents the fair value ("FV") and carrying value ("CV") of Hudbay's financial instruments and non-financial derivatives:

		Dec. 31, 2020						Dec. 31, 2019
		FV			CV			FV			CV
Financial assets at amortized cost
Cash and cash equivalents 1	$	439,135		$	439,135		$	396,146		$	396,146
Restricted cash1		337			337			337			337
Fair value through profit or loss
Trade and other receivables 1, 2, 3		114,381			114,381			91,046			91,046
Non-hedge derivative assets 4		2,736			2,736			1,712			1,712
Investments 5		15,669			15,669			11,287			11,287
Total financial assets		572,258			572,258			500,528			500,528
Financial liabilities at amortized cost
Trade and other payables1, 2		209,413			209,413			184,604			184,604
Deferred Rosemont acquisition consideration 8		25,961			25,961			24,491			24,491
Other financial liabilities 6		41,912			40,787			21,338			24,000
Senior unsecured notes 7		1,277,124			1,139,695			1,050,126			991,558
Fair value through profit or loss
Embedded derivatives 4		—			—			9,074			9,074
Gold prepayment liability 9		137,031			137,031			—			—
Non-hedge derivative liabilities 4		15,312			15,312			10,295			10,295
Total financial liabilities		1,706,753			1,568,199			1,299,928			1,244,022
Net financial liability	$	(1,134,495	)	$	(995,941	)	$	(799,400	)	$	(743,494	)
1 Cash and cash equivalents, restricted cash, trade and other receivables and trade and other payables are recorded at carrying value, which approximates fair value due to their short-term nature and generally negligible credit losses.
2 Excludes tax and other statutory amounts.
3 Trade and other receivables contain receivables including provisionally priced receivables classified as FVLTPL and various other items at amortized cost. The fair value of provisionally priced receivables is determined using forward metals prices which is a level 2 valuation method.
4 Derivatives are carried at their fair value, which is determined based on internal valuation models that reflect observable forward market commodity prices, currency exchange rates, and discount factors based on market US dollar interest rates adjusted for credit risk.
5 All investments are carried at their fair value, which is determined using quoted market bid prices in active markets for listed shares.
6 These financial liabilities relate to agreements with communities near the Constancia project in Peru (note 15). Fair values have been determined using a discounted cash flow analysis based on expected cash flows and a credit adjusted discount rate.
7 Fair value of the senior unsecured notes (note 17) has been determined using the quoted market price at the period end. Fair value incorporates the fair value of the prepayment option embedded derivative. The carrying value of this embedded derivative is at FVTPL (2020: $49,754; 2019: $2,585) and has been determined using a binomial tree/lattice approach based on the Hull-White single factor interest rate term structure model.
8 Discounted value based on a risk adjusted discount rate.
9 The gold prepayment liability (note 15) is designated as fair value through profit or loss under the fair value option. Gains and losses related to the Company's own credit risk have been recorded at fair value through other comprehensive income. The fair value adjustment recorded in other comprehensive income for the year ended December 31, 2020 was a loss of $1,885.

Fair value hierarchy

The table below provides an analysis by valuation method of financial instruments that are measured at fair value subsequent to recognition. Levels 1 to 3 are defined based on the degree to which fair value inputs are observable and have a significant effect on the recorded fair value, as follows:

— Level 1: Quoted prices in active markets for identical assets or liabilities;

— Level 2: Valuation techniques use significant observable inputs, either directly or indirectly, or valuations are based on quoted prices for similar instruments; and,

—Level 3: Valuation techniques use significant inputs that are not based on observable market data.

December 31, 2020		Level 1		Level 2		Level 3		Total
Financial assets measured at fair value
Financial assets at FVTPL:
Non-hedge derivatives	$	—	$	2,736	$	—	$	2,736
Investments		15,669		—		—		15,669
	$	15,669	$	2,736	$	—	$	18,405
Financial liabilities measured at fair value
Financial liabilities at FVTPL:
Non-hedge derivatives	$	—	$	15,312	$	—	$	15,312
Gold prepayment liability1		—		137,031		—		137,031
Financial liabilities at amortized cost:
Other financial liabilities		—		—		41,912		41,912
Senior unsecured notes		1,277,124		—		—		1,277,124
	$	1,277,124	$	152,343	$	41,912	$	1,471,379
1The gold prepayment liability (note 15) is designated as fair value through profit or loss under the fair value option.  Gains and losses related to the Company's own credit risk have been recorded at fair value through other comprehensive income. The fair value adjustment recorded in other comprehensive income for the year ended December 31, 2020 was a loss of $1,885.

 

December 31, 2019		Level 1		Level 2		Level 3		Total
Financial assets measured at fair value
Financial assets at FVTPL:
Non-hedge derivatives	$	—	$	1,712	$	—	$	1,712
Investments		11,287		—		—		11,287
	$	11,287	$	1,712	$	—	$	12,999
Financial liabilities measured at fair value
Financial liabilities at FVTPL:
Embedded derivatives	$	—	$	9,074	$	—	$	9,074
Non-hedge derivatives		—		10,295		—		10,295
Financial liabilities at amortized cost:
Other financial liabilities		—		—		21,338		21,338
Senior unsecured notes		1,050,126		—		—		1,050,126
	$	1,050,126	$	19,369	$	21,338	$	1,090,833

The Company's policy is to recognize transfers into and transfers out of fair value hierarchy levels as of the date of the event or change in circumstances that caused the transfer. During the year ended December 31, 2020 and 2019 Hudbay did not make any such transfers.

(b) Derivatives and hedging:

Copper fixed for floating swaps

Hudbay enters into copper fixed for floating swaps in order to manage the risk associated with provisional pricing terms in copper concentrate sales agreements. As at December 31, 2020, Hudbay had 43.4 million pounds of net copper swaps outstanding at an effective average price of $3.22/lb and settling across January to April 2021. As at December 31, 2019, Hudbay had 66.1 million pounds of net copper swaps outstanding at an effective average price of $2.67/lb and settling across January to April 2020. The aggregate fair value of the transactions at December 31, 2020 was a net liability of $13,198 (December 31, 2019 - a liability position of $8,362).

Transactions involving derivatives are with large multi-national financial institutions that Hudbay believes to be credit worthy.

Non-hedge derivative zinc contracts

Hudbay enters into future dated fixed price sales contracts with zinc customers and, to ensure that the Company continues to receive a floating or unhedged realized zinc price, Hudbay enters into forward zinc purchase contracts that effectively offset the fixed price sales contracts. At December 31, 2020, Hudbay held contracts for forward zinc purchased of 3.5 million pounds (December 31, 2019 - 12.7 million pounds) that related to forward customer sales of zinc. Prices range from $0.87/lb to $1.30/lb (December 31, 2019 - $1.00/lb to $1.15/lb) and settlement dates extend to December 2021. The aggregate fair value of the transactions at December 31, 2020 was an asset position of $622 (December 31, 2019 - a net liability position of $221).

(c) Provisionally priced receivables

Changes in fair value of provisionally priced receivables

Hudbay records changes in fair value of provisionally priced receivables related to provisional pricing in concentrate purchase, concentrate sale and certain other sale contracts. Under the terms of these contracts, prices are subject to final adjustment at the end of a future period after title transfers based on quoted market prices during the quotation period specified in the contract. The period between provisional pricing and final pricing is typically up to three months.

Changes in fair value of provisionally priced receivables are presented in trade and other receivables when they relate to sales contracts and in trade and other payables when they relate to purchase contracts. At each reporting date, provisionally priced metals are marked-to-market based on the forward market price for the quotation period stipulated in the contract, with changes in fair value recognized in revenue for sales contracts and in inventory or cost of sales for purchase concentrate contracts. Cash flows related to changes in fair value of provisionally priced receivables are classified in operating activities.

As at December 31, 2020 and 2019, Hudbay's net position consisted of contracts awaiting final pricing which are as indicated below:

Metal in concentrate		Sales awaiting final pricing		Average YTD price ($/unit)
	Unit	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Copper	pounds (in thousands)	47,901	72,977	3.52	2.80
Gold	oz	18,106	16,152	1,894	1,522
Silver	oz	123,380	124,371	26.35	17.86

The aggregate changes in fair value of provisionally priced receivables within the copper and zinc concentrate sales contracts at December 31, 2020, was an asset position of $21,295 (December 31, 2019 - an asset position of $10,165).

(d)Embedded derivatives

Prepayment option embedded derivative

The senior unsecured notes (note 17) contain prepayment options, which represent embedded derivatives that require bifurcation from the host contract. The prepayment options are measured at fair value, with changes in the fair value being recognized as change in fair value of financial instruments (note 6g). The fair value of the embedded derivative at December 31, 2020 was an asset of $49,754 (December 31, 2019 - $2,585).

Pampacancha delivery obligation-embedded derivative

During the first quarter of 2019, Hudbay recognized an obligation to deliver additional precious metal credits to Wheaton as a result of the Pampacancha deposit not being mined until after January 1, 2020 (note 15). The fair value of the embedded derivative at December 31, 2020 was nil as all payments have been made during 2020 (December 31, 2019 - a liability of $9,074). During the year ended December 31, 2020 precious metal credits totaling $10,856 were delivered to settle this liability.

(e) Other financial liabilities

Gold prepayment liability

The gold prepayment liability (note 15) requires settlement by physical delivery of gold ounces or equivalent gold credits. The fair value of the embedded derivative at December 31, 2020 was a liability of $137,031 (December 31, 2019 - nil).

(f) Financial risk management

Hudbay's financial risk management activities are governed by Board-approved policies addressing risk identification, hedging authorization procedures and limits and reporting. The Company's policy objective, when hedging activities are undertaken, is to reduce the volatility of future profit and cash flow within the strategic and economic goals of Hudbay. From time to time, the Company employs derivative financial instruments, including forward and option contracts, to manage risk originating from exposures to commodity price risk, foreign exchange risk and interest rate risk. Significant derivative transactions are approved by the Board of Directors, and hedge accounting is applied when certain criteria have been met. Hudbay does not use derivative financial instruments for trading or speculation purposes. The following is a discussion of the Company's risk exposures.

(i) Market risk

Market risk is the risk that changes in market prices, including foreign exchange rates, commodity prices, share prices, and interest rates will cause fluctuations in the fair value or future cash flows of a financial instrument.

Foreign currency risk

Hudbay's primary exposure to foreign currency risk arises from:

— Translation of Canadian dollar denominated costs and, to a lesser extent, Peruvian soles cost into US dollars. Substantially all of the Company's revenue are denominated in US dollars, while the majority of its operating costs are denominated in either the Canadian dollar or Peruvian sol. Generally, with gross profit, appreciation of the US dollar relative to the Canadian dollar will increase Hudbay's profit.

— Translation of foreign currency denominated cash and cash equivalents, trade and other receivables, trade and other payables, as well as other financial liabilities. Appreciation of the US dollar relative to a foreign currency will decrease the net asset value of these balances once they have been translated to US dollars, resulting in foreign currency translation losses on foreign currency denominated assets and gains on foreign currency denominated liabilities.

The Manitoba segment's primary financial instrument foreign currency exposure is on US denominated cash and cash equivalents, trade and other receivables and other financial liabilities. The Peru segment's primary financial instrument foreign currency exposure is on Peruvian soles cash and cash equivalents, trade and other payables and other financial liabilities.

The Company's exposure to foreign currency risk was as follows based on notional financial instruments amounts stated in US equivalent dollars:

		Dec. 31, 2020									Dec. 31, 2019
		CAD1			USD2			PEN3			CAD1			USD2			PEN3
Cash and cash equivalent	$	7,791		$	3,895		$	4,141		$	8,394		$	21,217		$	7,617
Trade and other receivables		31			43,316			36,951			374			56,998			25,413
Other financial assets		15,669			—			—			11,287			—			—
Trade and other payables		(6,104	)		(1,419	)		(34,622	)		(5,719	)		(435	)		(22,618	)
Other financial liabilities		—			—			(40,787	)		—			—			(24,000	)
	$	17,387		$	45,792		$	(34,317	)	$	14,336		$	77,780		$	(13,588	)
1 HMI is exposed to foreign currency risk on CAD.
2 The Manitoba segment is exposed to foreign currency risk on USD.
3 The Peru segment is exposed to foreign currency risk on PEN.

The following sensitivity analysis for foreign currency risk relates solely to financial instruments and non-financial derivatives that were outstanding as at the year-end date; each sensitivity calculation assumes all other variables are held constant. This analysis is based on values as at December 31, 2020 and does not reflect the overall effect that changes in market variables would have on the Company's operating results.

December 31, 2020	Change of:	Would have changed 2020 after-tax profit by:
USD/CAD exchange rate1	+ 10%	$	1.1		million
USD/CAD exchange rate1	- 10%	(1.4		)	million
USD/PEN exchange rate2	+ 10%	2.0			million
USD/PEN exchange rate2	- 10%	(2.5		)	million
December 31, 2019	Change of:	Would have changed 2019 after-tax profit by:
USD/CAD exchange rate1	+ 10%	$	3.4		million
USD/CAD exchange rate1	- 10%	(4.1		)	million
USD/PEN exchange rate2	+ 10%	0.8			million
USD/PEN exchange rate2	- 10%	(1.0		)	million

¹ Effect on profit due to foreign currency remeasurements of balances denominated in a currency different from a Hudbay subsidiary's functional currency.

² Effect on profit due to foreign currency remeasurement of balances denominated in Peruvian Sol.

Commodity price risk

Hudbay is exposed to market risk from prices for the commodities the Company produces and sells, such as copper, zinc, gold and silver. From time to time, Hudbay  maintains price protection programs and conducts commodity price risk management through the use of derivative contracts. The following sensitivity analysis for commodity price risk relates solely to financial instruments and non-financial derivatives that were outstanding as at the year-end date; each sensitivity calculation assumes all other variables are held constant. This analysis is based on values as at December 31, 2020 and does not reflect the overall effect that changes in market variables would have on the Group's results of operations.

December 31, 2020		Change of:		Would have changed  2020 after-tax profit by:
Copper prices ($/lb)3		+	$0.30		$	(1.4)	million
Copper prices ($/lb)3		—	$0.30		1.4		million
Zinc prices ($/lb)4		+	$0.10		0.3		million
Zinc prices ($/lb)4		—	$0.10		(0.3)		million
December 31, 2019		Change of:		Would have changed 2019 after-tax profit by:
Copper prices ($/lb)3		+	$0.30		(2.0)		million
Copper prices ($/lb)3		—	$0.30		2.0		million
Zinc prices ($/lb)4		+	$0.10		1.0		million
Zinc prices ($/lb)4		—	$0.10		(1.0)		million
	3 Effect on profit due to provisional pricing derivatives (note 27c) and copper fixed for floating swaps (note 27b).
	4 Effect on profit due to provisional pricing derivatives (note 27c) and non-hedge zinc derivatives (note 27b).

Share price risk

Hudbay is exposed to market risk from share prices of the Company's investments in listed Canadian metals and mining entities. These investments are made to foster strategic relationships, in connection with joint venture agreements and for investment purposes. Management monitors the value of these investments for the purposes of determining whether to add or reduce Hudbay's positions. The following sensitivity analysis of share price risk relates solely to financial instruments that were outstanding as at the year-end date; each sensitivity calculation assumes all other variables are held constant. This analysis is based on values as at December 31, 2020 and does not reflect the overall effect that changes in market variables would have on the Company's finance expenses.

December 31, 2020	Change of:		Would have changed 2020 after-tax profit by:
Share prices	+	25%		$	3.9	million
Share prices	—	25%		(3.9)		million
December 31, 2019	Change of:		Would have changed 2019 after-tax profit by:
Share prices	+	25%		$	2.8	million
Share prices	—	25%		(2.8)		million

Interest rate risk

Hudbay is exposed to the following interest rate risks:

-  cash flow interest rate risk on its cash and cash equivalents;

-  fair value interest rate risk on its embedded derivative associated with its senior notes; and,

-  interest rate risk on its senior secured revolving credit facilities.

The most material of these risks is the embedded derivative associated with its senior notes. This analysis is based on values at December 31, 2020 and does not reflect the overall effect that changes in market variables would have on the Company's finance expenses.

December 31, 2020	Change of:		Would have changed 2020 after-tax profit by:
Interest rates	+	2.00%		$	(38.0)	million
Interest rates	—	2.00%		48.5		million
December 31, 2019	Change of:		Would have changed 2019 after-tax profit by:
Interest rates	+	2.00%		$	2.3	million
Interest rates	—	2.00%		(2.6)		million

(ii) Credit risk

Credit risk is the risk of financial loss to Hudbay if a customer or counterparty to a financial instrument fails to meet its obligations. The Company's maximum exposure to credit risk at the reporting date is represented by the carrying amount, net of any impairment losses recognized, of financial assets and non-financial derivative assets recorded on the consolidated balance sheets. Refer to note 27a.

A large portion of Hudbay's cash and cash equivalents are on deposits with major Schedule 1 Canadian banks. Deposits and other investments with Schedule 1 Canadian banks represented 90% of total cash and cash equivalents as at December 31, 2020 (2019 - 92%). Hudbay's investment policy requires it to comply with a list of approved investments, concentration and maturity limits, as well as credit quality. Credit concentrations in the Company's short term investments are monitored on an ongoing basis.

Transactions involving derivatives are with counterparties Hudbay believes to be creditworthy.

Management has a credit policy in place that requires the Company to obtain credit insurance from an investment grade credit insurance provider to mitigate exposure to credit risk in its receivables. At December 31, 2020, approximately 95% of Hudbay's trade receivables were insured or payable by letters of credit (2019 - 96% were insured or payable by letters of credit). Insured receivables have a credit insurance deductible of 10%. The deductible and any additional exposure to credit risk is monitored and approved on an ongoing basis.

Two customers accounted for approximately 56% of total trade receivables as at December 31, 2020 (2019 - two customers accounted for approximately 63%). Credit risk for these customers is assessed as medium to low. As at December 31, 2020, none of the Company's trade receivables were aged more than 30 days (2019 - nil).

(iii) Liquidity risk

Liquidity risk is the risk that the Company will not be able to meet its obligations associated with financial liabilities. Hudbay's objective is to maintain sufficient liquid resources to meet operational and investing requirements.

The following summarizes the contractual undiscounted cash flows of the Company's non-derivative and derivative financial liabilities, including any interest payments, by remaining contractual maturity and financial assets used to manage liquidity risk. The table includes all instruments held at the reporting date for which payments had been contractually agreed at the reporting date. The undiscounted amounts shown are gross amounts, unless the liabilities will be settled net. Amounts in foreign currency are translated at the closing rate at the reporting date. When a counterparty has a choice of when an amount is paid, the liability is allocated to the earliest possible time period.

 

Dec. 31, 2020	Carrying amount			Contractual cash flows			12 months or less			13 - 36 months			37 - 60 months			More than 60 months
Assets used to manage liquidity risk
Cash and cash equivalents	$	439,135		$	439,135		$	439,135			—		$	—		$	—
Restricted cash		337			337			337			—			—			—
Trade and other receivables		114,381			114,381			114,381			—			—			—
Non-hedge derivative assets		2,736			2,736			2,736			—			—			—
	$	556,589		$	556,589		$	556,589		$	—		$	—		$	—
Non-derivative financial liabilities
Trade and other payables, including embedded derivatives	$	(209,413	)	$	(209,413	)	$	(209,413	)	$	—		$	—		$	—
Other financial liabilities 1		(40,787	)		(58,837	)		(12,097	)		(9,483	)		(6,578	)		(30,679	)
Deferred Rosemont acquisition consideration		(25,961	)		(30,000	)		—			(20,000	)		(10,000	)		—
Long-term debt, including embedded derivatives		(1,139,695	)		(1,726,904	)		(87,966	)		(168,188	)		(742,125	)		(728,625	)
Gold prepayment obligation		(137,031	)		(137,031	)		—			(137,031	)		—			—
	$	(1,552,887	)	$	(2,162,185	)	$	(309,476	)	$	(334,702	)	$	(758,703	)	$	(759,304	)
Derivative financial liabilities
Non hedge derivative contracts	$	(15,312	)	$	(15,312	)	$	(15,312	)	$	—		$	—		$	—
	$	(15,312	)	$	(15,312	)	$	(15,312	)	$	—		$	—		$	—
1 Represents the Peru community agreement obligation, excluding interest.

Dec. 31, 2019		Carrying amount			Contractual cash flows			12 months or less			13 - 36 months			37 - 60 months			More than 60 months
Assets used to manage liquidity risk
Cash and cash equivalents	$	396,146		$	396,146		$	396,146		$	—		$	—		$	—
Restricted cash		337			337			337
Trade and other receivables		91,046			91,046			89,451			—			—			1,595
Non-hedge derivative assets		1,712			1,712			1,712			—			—			—
	$	489,241		$	489,241		$	487,646		$	—		$	—		$	1,595
Non-derivative financial liabilities
Trade and other payables, including embedded derivatives	$	(184,604	)	$	(184,604	)	$	(184,604	)	$	—		$	—		$	—
Other financial liabilities 1		(24,000	)		(33,723	)		(6,672	)		(4,811	)		(4,734	)		(17,506	)
Deferred Rosemont acquisition consideration		(24,491	)		(30,000	)		—			(10,000	)		(20,000	)		—
Long-term debt, including embedded derivatives		(991,558	)		(1,350,540	)		(72,165	)		(149,500	)		(1,128,875	)		—
	$	(1,224,653	)	$	(1,598,867	)	$	(263,441	)	$	(164,311	)	$	(1,153,609	)	$	(17,506	)
Derivative financial liabilities
Embedded derivative	$	(9,074	)	$	(9,074	)	$	(9,074	)	$	—		$	—		$	—
Non-hedge derivative contracts		(10,295	)		(10,295	)		(10,295	)		—			—			—
	$	(19,369	)	$	(19,369	)	$	(19,369	)	$	—		$	—		$	—
1 Represents the Peru community agreement obligation, excluding interest.

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Commitments and contingencies

12 Months Ended

Dec. 31, 2020

Notes to Financial Statements [Abstract]

Commitments and contingencies [Text Block]

28. Commitments and contingencies

Capital commitments

(a) Non capitalized lease commitments

Hudbay has entered into various non-capitalized lease commitments for facilities and equipment. The leases expire in periods ranging from one to two years. There are no restrictions placed on the Company by entering into these leases. Future minimum lease payments under such cancellable leases recognized within results from operating activities at December 31 are:

		2020		2019
Within one year	$	58,173	$	57,860
After one year but not more than five years		2,192		26,395
More than five years		—		—
	$	60,365	$	84,255

(b) Capital Commitments

As at December 31, 2020, Hudbay had outstanding capital commitments in Canada of approximately $22,539 of which $19,014 can be terminated, approximately $39,078 in Peru, all of which can be terminated, and approximately $179,656 in Arizona, primarily related to the Rosemont project, of which approximately $89,312 can be terminated by Hudbay.

(c) Contingent liabilities

Contingent liabilities

Hudbay is involved in various claims, litigation and other matters arising in the ordinary course and conduct of business. While it is not possible to determine the ultimate outcome of such actions at this time, and inherent uncertainties exist in predicting such outcomes, it is the Company's belief that the ultimate resolution of such actions is not reasonably likely to have material adverse effect on its consolidated financial position or results of operations. The assessment of contingencies inherently involves the exercise of significant judgement and estimates of the outcome of future events. As a result of the assessment, no significant contingent liabilities have been recorded in these consolidated financial statements.

As part of the streaming agreement with Wheaton for the 777 mine, Hudbay must repay, with precious metal credits, the legal deposit provided by Wheaton by August 1, 2052, the expiry date of the arrangement. If the legal deposit is not fully repaid with precious metal credits related to 777 production by the expiry date, a cash payment for the remaining amount will be due at the expiry date of the agreement. As a result of changes in the remaining 777 mine reserves and lower precious metal prices, there is a possibility that an amount of Wheaton's legal deposit may not be repaid by means of 777 mine's production over its expected remaining mine life.

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Related parties

12 Months Ended

Dec. 31, 2020

Disclosure of transactions between related parties [abstract]

Related parties [Text Block]

29.Related parties

(a) Group companies

The financial statements include the financial statements of the Company and the following significant subsidiaries:

				Beneficial ownership of ultimate controlling party (Hudbay Minerals Inc.)
Name	Jurisdiction	Business	Entity's Parent	2020	2019
HudBay Marketing & Sales Inc.	Canada	Marketing and sales	HMI	100%	100%
HudBay Peru Inc.	British Columbia	Holding company	HMI	100%	100%
HudBay Peru S.A.C.	Peru	Exploration/development	Peru Inc.	100%	100%
HudBay (BVI) Inc.	British Virgin Islands	Precious metals sales	Peru Inc.	100%	100%
Hudbay Arizona Inc.	British Columbia	Holding company	HMI	100%	100%
Rosemont Copper Company	Arizona	Exploration/development	HudBay Arizona (US) Holding Corporation	100%	100%

Transactions between the Company and its subsidiaries, which are related parties of the Company, have been eliminated on consolidation and are not disclosed in this note.

(b) Compensation of key management personnel

The Company's key management includes members of the Board of Directors, Hudbay's Chief Executive Officer, Hudbay's senior vice presidents and vice presidents. Total compensation to key management personnel was as follows:

		2020		2019
Short-term employee benefits1	$	7,951	$	8,319
Post-employment benefits		639		762
Long-term share-based awards		6,381		6,966
	$	14,971	$	16,047

¹ Such as salaries and social security contributions, paid annual leave and paid sick leave, profit-sharing and bonuses and nonmonetary benefits (such as medical care, housing, cars and free or subsidized goods or services) for current employees.

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Supplementary cash flow information

12 Months Ended

Dec. 31, 2020

Supplementary Cash Flow Information [Abstract]

Supplementary cash flow information [Text Block]

30.      Supplementary cash flow information

(a)     Change in non-cash working capital:

		Year ended December 31,
		2020			2019
Change in:
Trade and other receivables	$	(37,720	)	$	3,252
Other financial assets/liabilities		4,077			12,540
Inventories		(2,867	)		(11,759	)
Prepaid expenses		(3,722	)		(3,484	)
Trade and other payables		36,247			5,613
Provisions and other liabilities		1,602			(2,590	)
	$	(2,383	)	$	3,572

(b) Non-cash transactions:

During the year ended December 31, 2020 and 2019, Hudbay entered into the following non-cash investing and financing activities which are not reflected in the consolidated statements of cash flows:

- Remeasurement of Hudbay's decommissioning and restoration liabilities for year ended December 31, 2020 led to a net increase in related property, plant and equipment assets of $46,792 (year ended December 31, 2019 - increase of $89,408) related to lower discount rates associated with remeasurement of the liabilities.

- Property, plant and equipment included $17,759 (year ended December 31, 2019 - $22,158) of capital additions related to the recognition of ROU assets and $116,233 of capital additions related to agreements with communities (year ended December 31, 2019 - $7,369).

- In 2019, immediately prior to purchasing United Copper & Moly LLC's ("UCM") remaining interest in the Rosemont project, Hudbay agreed to release UCM from repayment obligations under a Rosemont project loan in exchange for an increase in equity in Rosemont. As a result, the loan receivable balance of $25,978 was written off. Hudbay recognized the loss on write-off of the loan receivable in the income statement (refer to note 6d). In addition, in order to recognize previously unfunded contributions to the Rosemont Project due from UCM, the Company recognized an increase to other capital reserves, a component of shareholder's equity.

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Segmented information

12 Months Ended

Dec. 31, 2020

Disclosure of operating segments [abstract]

Segmented information [Text Block]

31. Segmented information

Hudbay is an integrated metals producer. When making decisions on expansions, opening or closing mines, as well as day to day operations, management evaluates the profitability of the overall operation of the Company. Hudbay's main mining operations are located in Manitoba and Saskatchewan (Canada) and Cusco (Peru) and are included in the Manitoba segment and Peru segment, respectively. The Manitoba and Peru segments generate Hudbay's revenue. The Manitoba segment sells copper concentrate (containing copper, gold and silver), zinc metal and other products. The Peru segment consists of Hudbay's Constancia operation and sells copper concentrate and molybdenum concentrate. Hudbay's Arizona segment consists of the  Rosemont project located in Arizona. Corporate and other activities include the Company's exploration activities in Chile, and Nevada. The exploration entities are not individually significant, as they do not meet the minimum quantitative thresholds. Corporate activities are not considered a segment and are included as a reconciliation to total consolidated results. Accounting policies for each reported segment are the same as those of the Company. Results from operating activities represents the profit earned by each segment without allocation of corporate costs. This is the measure reported to the chief operating decision-maker, Hudbay's President and Chief Executive Officer, for the purposes of resource allocation and the assessment of segment performance. Total assets and liabilities do not reflect intercompany balances, which have been eliminated on consolidation.

Year ended December 31, 2020
		Manitoba		Peru			Arizona			Corporate and other activities			Total
Revenue from external customers	$	615,699	$	476,719		$	—		$	—		$	1,092,418
Cost of sales
Mine operating costs		391,504		300,087			—			—			691,591
Depreciation and amortization		177,552		184,275			—			—			361,827
Gross profit (loss)		46,643		(7,643	)		—			—			39,000
Selling and administrative expenses		—		—			—			41,408			41,408
Exploration and evaluation expenses		6,491		6,295			3,870			540			17,196
Other expenses		8,382		4,901			2,066			2,234			17,583
Results from operating activities	$	31,770	$	(18,839	)	$	(5,936	)	$	(44,182	)	$	(37,187	)
Net interest expense on long term debt													82,712
Accretion on streaming arrangements													56,670
Change in fair value of financial instruments													(29,370	)
Other net finance costs													31,890
Loss before tax													(179,089	)
Tax recovery													(34,505	)
Loss for the year												$	(144,584	)

 

 

Year ended December 31, 2019
		Manitoba			Peru		Arizona			Corporate and other activities			Total
Revenue from external customers	$	537,421		$	700,018	$	—		$	—		$	1,237,439
Cost of sales
Mine operating costs		385,159			356,183		—			—			741,342
Depreciation and amortization		135,429			209,126		—			—			344,555
Gross profit		16,833			134,709		—			—			151,542
Selling and administrative expenses		—			—		—			36,170			36,170
Exploration and evaluation expenses		18,476			5,804		—			6,494			30,774
Other expenses		8,201			14,022		28,149			744			51,116
Impairment loss		—			—		322,249			—			322,249
Results from operating activities	$	(9,844	)	$	114,883	$	(350,398	)	$	(43,408	)	$	(288,767	)
Net interest expense on long term debt													68,375
Accretion on streaming arrangements													69,772
Change in fair value of financial instruments													8,247
Other net finance costs													17,602
Loss before tax													(452,763	)
Tax recovery													(108,953	)
Loss for the year												$	(343,810	)

December 31, 2020
		Manitoba		Peru		Arizona		Corporate and other activities		Total
Total assets	$	801,691	$	2,535,939	$	718,982	$	610,033	$	4,666,645
Total liabilities		562,013		973,756		76,926		1,354,144		2,966,839
Property, plant and equipment1		699,884		2,290,097		709,939		31,735		3,731,655
1Included in Corporate and Other activities is $27.5 million of property, plant and equipment that is located in Nevada.

December 31, 2020
		Manitoba		Peru		Arizona		Corporate and other activities		Total
Additions to property, plant and equipment	$	159,313	$	208,805	$	18,640	$	32	$	386,790

 

December 31, 2019
		Manitoba		Peru		Arizona		Corporate and other activities		Total
Total assets	$	779,896	$	2,556,895	$	700,799	$	423,467	$	4,461,057
Total liabilities		556,267		926,642		78,988		1,051,037		2,612,934
Property, plant and equipment1		684,679		2,253,404		691,538		32,938		3,662,559

¹Included in Corporate and Other activities is $27.3 million of property, plant and equipment that is located in Nevada

December 31, 2019
		Manitoba		Peru		Arizona		Corporate and other activities		Total
Additions to property, plant and equipment	$	143,418	$	101,717	$	38,923	$	905	$	284,963

Geographical Segments

The following tables represent revenue information regarding the Group's geographical segments for the years ended December 31:

		2020		2019
Revenue by customer location 1
Canada	$	422,403	$	418,636
China		215,278		158,795
United States		206,906		209,382
Philippines		77,575		71,506
Peru		56,437		110,411
Switzerland		55,703		162,167
Singapore		29,314		71,506
Germany		11,725		10,731
Other		17,077		24,305
	$	1,092,418	$	1,237,439

¹ Presented based on the ultimate destination of the product if known. If the eventual destination of the product sold through traders is not known then revenue is allocated to the location of the customer's business office and not the ultimate destination of the product.

During the year ended December 31, 2020, eight customers accounted for approximately 36%, 17%, 13%, 7%, 7%, 5%, 5%, and 5% respectively, of total revenue during the year. Revenue from these customers has been presented in the Manitoba and Peru operating segments.

During the year ended December 31, 2019, six customers accounted for approximately 24%, 9%, 9%, 8%, 5% and 5%, respectively, of total revenue during the year. Revenue from these customers has been presented in the Manitoba and Peru operating segments.

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Events after the reporting period

12 Months Ended

Dec. 31, 2020

Disclosure of non-adjusting events after reporting period [abstract]

Events after the reporting period [Text Block]

32. Events after the reporting period

As a result of the delay in finalizing the remaining land user agreements coupled with new, heightened, domestic travel restrictions announced on January 26, 2021 by the government of Peru, Hudbay has concluded that it no longer expects to mine four million tonnes of ore from the Pampacancha deposit by June 30, 2021. If we fail to meet this milestone, we will be required to deliver an additional 8,020 ounces of gold to Wheaton in equal quarterly installments, at prevailing market prices, starting September 30, 2021.

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Significant accounting policies (Policies)

12 Months Ended

Dec. 31, 2020

Significant Accounting Policies [Abstract]

Basis of consolidation [Policy Text Block]

a)    Basis of consolidation:

Intercompany balances and transactions are eliminated upon consolidation. When a Hudbay entity transacts with an associate or jointly controlled entity of the Company, unrealized profits and losses are eliminated to the extent of Hudbay's interest in the relevant associate or joint venture. The accounting policies of Hudbay's entities are changed when necessary to align them with the policies adopted by the Company.

Subsidiaries

A subsidiary is an entity controlled by Hudbay. The financial statements of subsidiaries are included in the consolidated financial statements from the date that control commences until the date that control ceases.

Business combinations and goodwill

When Hudbay makes an acquisition, it first determines whether the assets acquired and liabilities assumed constitute a business, in which case the acquisition requires accounting as a business combination. Management applies judgement in determining whether the acquiree is capable of being conducted and managed for the purpose of providing a return, considering the inputs of the acquiree and processes applied to those inputs that have the ability to create outputs.

Hudbay applies the acquisition method of accounting to business combinations, whereby the goodwill is measured at the acquisition date as the fair value of the consideration transferred including the recognized amount of any non-controlling interests in the acquiree. When the excess is negative, a bargain purchase gain is recognized immediately in the consolidated income statements. The assessment of fair values on acquisition includes those mineral reserves and resources that are able to be reliably measured. In determining these fair values, management must also apply judgement in areas including future cash flows, metal prices, exchange rates and appropriate discount rates. Changes in such estimates and assumptions could result in significant differences in the amount of goodwill recognized.

The consideration transferred is the aggregate of the fair values, at the date of the acquisition, of the sum of the assets transferred, the liabilities incurred or assumed, and the equity instruments issued by the acquirer in exchange for control of the acquiree. Acquisition-related costs are recognized in the consolidated income statements as incurred, unless they relate to issuance of debt or equity securities.

Where applicable, the consideration transferred includes any asset or liability resulting from a contingent consideration arrangement and measured at its acquisition date fair value. Subsequent changes in such fair values are adjusted against the cost of acquisition where they qualify as measurement period adjustments. All other subsequent changes in the fair value of contingent consideration classified as an asset or liability are accounted for in accordance with relevant IFRS. Changes in the fair value of contingent consideration classified as equity are not recognized.

Where a business combination is achieved in stages, the Company's previously held interests in the acquired entity are remeasured to fair value at the acquisition date, which is the date Hudbay attains control, and any resulting gain or loss is recognized in the consolidated income statements. Amounts previously recognized in other comprehensive income ("OCI") related to interests in the acquiree prior to the acquisition date are reclassified to the consolidated income statements, where such treatment would be appropriate if that interest were disposed of.

After initial recognition, goodwill is measured at cost less any accumulated impairment losses. For the purpose of impairment testing, goodwill acquired in a business combination is, from the acquisition date, allocated to each of Hudbay's CGUs that are expected to benefit from the synergies of the combination, irrespective of whether other assets or liabilities of the acquiree are assigned to those units. Goodwill is allocated to the lowest level at which it is monitored for internal management purposes and is not larger than an operating segment before aggregation. Where goodwill forms part of a CGU and part of the operation within that unit is disposed of, the goodwill associated with the disposed operation is included in the determination of any gain or loss on disposal.

Goodwill is not amortized and is tested for impairment annually and whenever there is an indication of impairment. If any such indication exists, the recoverable amount of the CGU is estimated in order to determine the extent of the impairment, if any. The recoverable amount is determined as the higher of fair value less direct costs to sell and the CGU's value in use. An impairment loss in respect of goodwill is not reversed.

Fair value for mineral interests and related goodwill is generally determined as the present value of the estimated future cash flows expected to arise from the continued use of the asset, including any expansion prospects, and its eventual disposal, using assumptions that an independent market participant may take into account.

Value in use is determined as the present value of the estimated future cash flows expected to arise from the continued use of the asset in its present form and its eventual disposal. Value in use is determined by applying assumptions specific to Hudbay's continued use and cannot take into account future development.

The weighted average cost of capital of Hudbay or comparable market participants is used as a starting point for determining the discount rates, with appropriate adjustments for the risk profile of the countries in which the individual CGUs operate and the specific risks related to the development of the project.

Where the asset does not generate cash flows that are independent of other assets, Hudbay estimates the recoverable amount of the CGU to which the asset belongs. If the carrying amount of an asset or CGU exceeds its recoverable amount, the carrying amount of the asset or CGU is reduced to its recoverable amount. An impairment loss is recognized as an expense in the consolidated income statements.

Translation of foreign currencies [Policy Text Block]

b)   Translation of foreign currencies:

Management determines the functional currency of each Hudbay entity as the currency of the primary economic environment in which the entity operates.

Foreign currency transactions

Transactions in foreign currencies are translated to the respective functional currencies of Hudbay's entities at exchange rates in effect at the transaction dates.

At the end of each reporting period, monetary assets and liabilities denominated in foreign currencies are translated to the functional currency using the closing exchange rate. Non-monetary assets and liabilities measured at fair value are translated using the exchange rates at the date when fair value was determined. Non-monetary assets and liabilities measured at historical cost in a foreign currency are translated using exchange rates that were in effect at the transaction dates. The same translations are applied when an entity prepares its financial statements from books and records maintained in a currency other than its functional currency, except revenue and expenses may be translated at monthly average exchange rates that approximate those in effect at the transaction dates.

Foreign currency gains and losses arising on period-end revaluations are recognized in the consolidated income statements, except for a financial liability designated as a hedge of a net investment in a foreign operation, or qualifying cash flow hedges, which are recognized in OCI.

Foreign operations

For the purpose of the consolidated financial statements, assets and liabilities of Hudbay's entities that have functional currencies other than the US dollar are translated to US dollars at the reporting date using the closing exchange rate. Revenue and expenses are translated at monthly average exchange rates that approximate those in effect at the transaction dates. Differences arising from these foreign currency translations are recognized in OCI and presented within equity in the foreign currency translation reserve. When a foreign operation is disposed, the relevant exchange differences accumulated in the foreign currency translation reserve are transferred to the consolidated income statements as part of the profit or loss on disposal. On the partial disposal of a subsidiary that includes a foreign operation, the relevant proportion of such amount is reattributed to non-controlling interests. On disposal of a partial investment in an associate or joint venture that includes a foreign operation while retaining significant influence or joint control, the relevant proportion is reclassified to profit or loss.

Net investment in a foreign operation

Foreign currency gains and losses arising on translation of a monetary item receivable from or payable to a foreign operation for which settlement is neither planned nor likely to occur in the foreseeable future are considered to form part of a net investment in the foreign operation. Such gains and losses are recognized in OCI and presented within equity in the foreign currency translation reserve.

Revenue recognition [Policy Text Block]

c) Revenue recognition:

Revenue from the sale of goods is measured at the fair value of the consideration received or receivable, net of treatment and refining charges and pre-production revenue. Revenue from the sale of by-products is included within revenue.

Revenue is recognized when control of the goods sold has been transferred to the buyer. Control is deemed to have passed to the customer when significant risk and reward of the product has passed to the buyer, Hudbay has a present right to payment and physical possession of the product has been transferred to the buyer. Sale of concentrate and finished zinc frequently occur under the following terms, and management has assessed these terms in order to determine timing of transfer of control.

Incoterms used by Hudbay	Revenue recognized when goods:
Cost, Insurance and Freight (CIF)	Are loaded on board the vessel
Free on Board (FOB)	Are loaded on board the vessel
Delivered at place (DAP)	Arrive at the named place of destination
Delivered at terminal (DAT)	Arrive at the named place of destination
Free Carrier (FCA)	Arrive at the named place of delivery

Sales of concentrate and certain other products are provisionally priced. For these contracts, sales prices are subject to final adjustment at the end of a future period after shipment, based on quoted market prices during the quotational period specified in the contract. Revenue is recognized when the above criteria are achieved, using weight and assay results and forward market prices to estimate the fair value of the total consideration receivable. Therefore, revenue is initially recorded based on an initial provisional invoice. Subsequently, at each reporting date, until the provisionally priced sale is finalized, sales receivables are marked to market, with adjustments (both gains and losses) recorded within revenue separately as "Pricing and volume adjustments" in the notes to the consolidated financial statements and in trade and other receivables on the consolidated balance sheets. As per IFRS 15 Revenue, variability in price is deemed to be fair value movements on provisionally priced receivables under the scope of IFRS 9 Financial Instruments; variability in quantities is deemed to be variable consideration. The variable consideration from weights and assay changes to quantities has been assessed to be insignificant to warrant precluding revenue being recorded as a result of possible future sales reversals. An annual analysis of the accuracy of our weights and assays is completed, and if the accuracy rate falls below a certain threshold, management then evaluates whether revenue from future sales should be constrained as a result of it being highly probable that there would be a significant revenue reversal in the future.

Hudbay only includes in the transaction price an amount which is not highly likely to be subject to significant subsequent revenue reversal. Within sales contracts with customers, separate performance obligations may arise pertaining to the shipping of goods sold. If applicable, costs and the transaction price are allocated on a relative standalone selling basis to any separate performance obligations and are recognized over the period of time the goods sold are shipped, on a gross basis.

Hudbay recognizes deferred revenue in the event it receives payments from customers before a sale meets criteria for revenue recognition. There is a significant financing component associated with the Company's precious metal streaming arrangements since funds were received in advance of the delivery of concentrate. When a significant financing component is recognized, finance expense will be higher and revenues will be higher as the larger deferred revenue balance is amortized to revenues. A market-based discount rate is utilized at the inception of each of the respective stream agreements to determine a discount rate for computing the interest charges for the significant financing component of the deferred revenue balance. As product is delivered, the deferred revenue amount including accreted interest will be drawn down. The draw down rate requires the use of proven and probable reserves and certain resources in the calculation that are beyond proven and probable reserves which management is reasonably confident will be transferable to reserves. Key estimates used in determining the significant financing component include the discount rate and the reserve and resources assumed for conversion.

Cost of sales [Policy Text Block]

d)   Cost of sales:

Cost of sales consists of those costs previously included in the measurement of inventory sold during the period, as well as certain costs not included in the measurement of inventory, such as the cost of warehousing and distribution to customers, provisional pricing adjustments related to purchased concentrates, profit sharing, royalty payments, share-based compensation expense and other indirect expenses related to producing operations.

Cash and cash equivalents [Policy Text Block]

e)  Cash and cash equivalents:

Cash and cash equivalents include cash, demand deposits and short-term, highly liquid investments that are readily convertible to known amounts of cash and are subject to an insignificant risk of changes in value. Cash equivalents have maturities of three months or less at the date of acquisition. Interest earned is included in finance income on the consolidated income statements and in investing activities on the consolidated statements of cash flows.

Amounts that are restricted from being used for at least twelve months after the reporting date are classified as non-current assets and presented in restricted cash on the consolidated balance sheets. Changes in restricted cash balances are classified as investing activities on the consolidated statements of cash flows.

Inventories [Policy Text Block]

f)  Inventories:

Inventories consist of stockpiles, in-process inventory (concentrates and metals), metal products and supplies. Concentrates, metals and all other saleable products are valued at the lower of cost and estimated net realizable value. Net realizable value represents the estimated selling price for inventories less all estimated costs of completion and costs necessary to make the sale. Where the net realizable value is less than cost, the difference is charged to the consolidated income statements as an impairment charge in cost of sales. Costs associated with stripping activities in an open pit mine are capitalized to inventory and recorded through cost of sales unless the stripping activity can be shown to improve access to further quantities of ore that will be mined in future periods, in which case, the stripping costs are capitalized to property, plant and equipment.

Cost of production of concentrate inventory is determined on a weighted average cost basis and the cost of production of finished metal inventory is determined using the first in first out basis. The cost of production includes direct costs associated with conversion of production inventory based on normal production capacity: material, labour, contractor expenses, purchased concentrates, and an attributable portion of production overheads and depreciation of all property, plant and equipment involved with the mining and production process. Hudbay measures in-process inventories based on assays of material received at metallurgical plants and estimates of recoveries in the production processes. Due to significant uncertainty associated with volume and metal content, immaterial costs are not allocated to routine operating levels of stockpiled ore. Estimates and judgements are required to assess the nature of any significant changes to levels of ore stockpiles and determining whether allocation of costs is required.

Supplies are valued at the lower of average cost and net realizable value.

Intangible assets [Policy Text Block]

g)  Intangible assets:

Computer software is measured at cost less accumulated amortization and accumulated impairment losses. Costs include all directly attributable costs necessary to create, produce and prepare the asset to be capable of operating it in the manner intended by management.

Amortization methods, useful lives, and residual values if any, are reviewed at each year end and adjusted prospectively, if required. When an intangible asset is disposed of, or when no further economic benefits are expected, the asset is derecognized, and any resulting gain or loss is recorded in the consolidated income statements.

Currently, the Company's intangible assets relate primarily to enterprise resource planning ("ERP") information systems, which are amortized over their estimated useful lives.

Exploration and evaluation expenditures [Policy Text Block]

h)   Exploration and evaluation expenditures:

Exploration and evaluation activity begins when Hudbay obtains legal rights to explore a specific area and involves the search for mineral reserves, the determination of technical feasibility, and the assessment of commercial viability of an identified resource. Expenditures incurred in the exploration and evaluation phase include the cost of acquiring interests in mineral rights, licenses and properties and the costs of Hudbay's exploration activities, such as researching and analyzing existing exploration data, gathering data through geological studies, exploratory drilling, trenching, sampling, and certain feasibility studies.

Hudbay expenses the cost of its exploration and evaluation activities and capitalizes the cost of acquiring interests in mineral rights, licenses and properties in business combinations, asset acquisitions or option agreements. Amounts capitalized are recognized as exploration and evaluation assets and presented in property, plant and equipment. Exploration and evaluation assets acquired as a result of an asset acquisition or option agreement are initially recognized at cost, and those acquired in a business combination are recognized at fair value on the acquisition date. They are subsequently carried at cost less accumulated impairment. No depreciation is charged during the exploration and evaluation phase. Hudbay expenses the cost of subsequent exploration and evaluation activity related to acquired exploration and evaluation assets. Cash flows associated with acquiring exploration and evaluation assets are classified as investing activities in the consolidated statements of cash flows; those associated with exploration and evaluation expenses are classified as operating activities.

Judgement is required in determining whether the respective costs are eligible for capitalization where applicable, and whether they are likely to be recoverable, which may be based on assumptions about future events and circumstances. Estimates and assumptions made may change if new information becomes available.

Hudbay monitors exploration and evaluation assets for factors that may indicate their carrying amounts are not recoverable. If such indicators are identified, the Company tests the exploration and evaluation assets or their CGUs, as applicable, for impairment. Hudbay also tests for impairment when assets reach the end of the exploration and evaluation phase.

Exploration and evaluation assets are transferred to capital works in progress within property, plant and equipment once the Company determines that probable future economic benefits will be generated as a result of the expenditures. Hudbay's determination of probable future economic benefit is based on management's evaluation of the technical feasibility and commercial viability of the geological properties of a given ore body based on information obtained through evaluation activities, including metallurgical testing, resource and reserve estimates and the economic assessment of whether the ore body can be mined economically. Tools that may be used to determine this include a preliminary feasibility study, confidence in converting resources into reserves and the probability that the property could be developed into a mine site. At that time, the property is considered to enter the development phase, and subsequent evaluation costs are capitalized.

Property, plant and equipment [Policy Text Block]

(i) Property, plant and equipment:

Hudbay measures items of property, plant and equipment at cost less accumulated depreciation and any accumulated impairment losses.

The initial cost of an item of property, plant and equipment includes its purchase price or construction costs, including import duties and non-refundable purchase taxes, any costs directly attributable to bringing the asset into operation, and for qualifying assets, borrowing costs. The initial cost of property, plant and equipment also includes the initial estimate of the cost of dismantling and removing the item and restoring the site on which it is located, the obligation which Hudbay incurs either when the item is acquired or as a consequence of having used the item during a particular period for purposes other than to produce inventories during that period.

Capitalization of costs ceases once an asset is in the location and condition necessary for it to be capable of operating in the manner intended by management. At this time, depreciation commences. For a new mine, this occurs upon commencement of commercial production. Up to and including December 31, 2020, any revenue earned in the process of preparing an asset to be capable of operating in the manner intended by management is included in the cost of the constructed asset. Any other incidental revenue earned prior to commencement of commercial production is recognized in the consolidated income statements.

Carrying amounts of property, plant and equipment, including right-of-use ("ROU") assets, are depreciated to their estimated residual value over the estimated useful lives of the assets or the estimated life of the related mine or plant, if shorter. Where components of an asset have different useful lives, depreciation is calculated on each separate component. Components may be physical or non-physical, including the cost of regular major inspections and overhauls required in order to continue operating an item of property, plant and equipment.

Certain items of property, plant and equipment are depreciated on a unit-of-production basis. The unit-of-production method is based on proven and probable tonnes of ore reserves. There are numerous uncertainties inherent in estimating ore reserves, and assumptions that were valid at the reporting date may change when new information becomes available. The actual volume of ore extracted and any changes in these assumptions could affect prospective depreciation rates and carrying values.

The carrying amount of an item of property, plant and equipment is derecognized on disposal or when no future economic benefits are expected from its use or disposal. Upon derecognition of an item of property, plant and equipment, the difference between its carrying value and net sales proceeds, if any, is presented as a gain or loss in other operating income or expense in the consolidated income statements.

i.        Capital works in progress:

Capital works in progress consist of items of property, plant and equipment in the course of construction or mineral properties in the course of development, including those transferred upon completion of the exploration and evaluation phase. On completion of construction or development, costs are transferred to plant and equipment and/or mining properties as appropriate. Capital works in progress are not depreciated.

ii.       Mining properties:

Mining properties consist of costs transferred from capital works in progress when a mining property reaches commercial production, costs of subsequent mine and exploration development, and acquired mining properties in the production stage.

Mining properties include costs directly attributable to bringing a mineral asset into the state where it is capable of operating in the manner intended by management and includes such costs as the cost of shafts, ramps, track haulage drifts, ancillary drifts, pumps, electrical substations, refuge stations, ventilation raises, permanent manways, and ore and waste pass raises. The determination of development costs to be capitalized during the production stage of a mine operation requires the use of judgements and estimates such as estimates of tonnes of waste to be removed over the life of the mining area and economically recoverable reserves extracted as a result.

A mining property is considered to be capable of operating in a manner intended by management when it commences commercial production based on pre-established criteria. Upon commencement of commercial production, a mining property is depreciated on a unit-of-production method. Unit-of-production depreciation rates are determined based on the related proven and probable mineral reserves and associated future development costs.

Subsequent mine development costs are capitalized to the extent they are incurred in order to access reserves mineable over more than one year. Ongoing maintenance and development expenditures are expensed as incurred and included in cost of sales in profit or loss. These include ore stope access drifts, footwall and hangingwall drifts in stopes, drawpoints, drill drifts, sublevels, slots, drill raises, stope manway access raises and definition diamond drilling.

iii.    Plant and equipment:

Plant and equipment consists of buildings and fixtures, surface and underground fixed and mobile equipment and assets under lease.

Plant and equipment are depreciated on either unit-of-production or straight-line basis based on factors including the production life of assets and mineable reserves. In general, mining assets are depreciated using a unit-of-production method; equipment is depreciated using the straight-line method, based on the shorter of its useful life and that of the related mine or facility; and plants are depreciated using the straight-line method, with useful lives limited by those of related mining assets.

iv.     Right-of-use lease assets:

At inception of a contract, Hudbay assesses whether a contract is, or contains, a lease. A contract is, or contains, a lease if the contract conveys the right to control the use of an identified asset for a period of time in exchange for consideration. The Company assesses the following criteria in the determination of whether a contract conveys the right to control the use of an identified asset:

•  The contract involves the use of an identified asset - this may be specified explicitly or implicitly, and should be physically distinct or represent substantially all of the capacity of a physically distinct asset. If the supplier has substantive substitution rights, then the asset is not identified;

•  Hudbay has the right to obtain substantially all of the economic benefits from use of the asset throughout the period of use; and

•  Hudbay has the right to direct the use of the asset by means of decision making rights that are most relevant to changing how and for what purpose the asset is used. In the case where decisions about the asset's purpose is predetermined, Hudbay is deemed to have the right to direct the use of the asset if either:

•  Hudbay has the right to operate the asset; or,

•  Hudbay designed the asset in a way that predetermines how and for what purpose it will be used.

The Company recognizes a ROU asset and lease liability at the lease commencement date. The initial measurement of the ROU asset is on a present value basis. This is based on the calculated lease liability plus any initial direct costs incurred, an estimate of removal or restoration costs, and any payments made prior to commencement of the lease less any lease incentives received.

The right of use asset is subsequently depreciated using the straight-line method from the commencement date to the earlier of the end of the useful life of the right-of-use asset or the end of the lease term. The estimated useful lives of the right-of-use assets are determined on the same basis as those of property and equipment. In addition, the right-of-use asset is periodically reduced by impairment losses, if any, and adjusted for certain remeasurements of the lease liability.

The lease liability is measured at the present value of the lease payments that are yet to be paid at the commencement date, discounted using the interest rate implicit in the lease or, if that rate cannot be easily determined, Hudbay's incremental borrowing rate. Generally, the Company uses its incremental borrowing rate as the discount rate for applicable leases.

Lease payments included in the measurement of the lease liability comprise fixed payments including in substance fixed payments and variable payments that depend on an index or rate, amounts expected to be payable under a residual value guarantee and the additional costs Hudbay reasonably expects to incur due to purchase options, extension options and termination options reasonably expected to be exercised.

The lease liability is measured at amortized cost using the effective interest method. It is remeasured when there is a change in the expected future cash flows of a leasing contract either due to a change in index or rate, or due to a change in terms of the contract. When the lease liability is remeasured in this way, a corresponding adjustment is made to the carrying amount of the right-of-use asset, or is recorded in profit or loss if the carrying amount of the right-of-use asset is zero.

Hudbay has elected not to separate non-lease components and account for the lease and non-lease components as a single lease component for lease contracts of all asset classes.

The Company has elected not to recognize ROU assets and lease liabilities for short-term leases of machinery that have a lease term of 12 months or less and leases of low-value assets. Hudbay recognizes the lease payments associated with these leases as an expense on a straight-line basis over the lease term.

Hudbay does not enter into transactions where the Company acts as a lessor.

The incremental borrowing rate used for new ROU leases is a key management judgement.

v.       Depreciation rates of major categories of assets:

•	Capital works in progress		- not depreciated
•	Mining properties		- unit-of- production
•	Mining asset		- unit-of- production
•	Plant and Equipment
	◦	Equipment	- straight-line over 1 to 20 years
	◦	Other plant assets	- straight-line over 1 to 20 years/unit-of-production
•	ROU Assets		- straight -line over 1 to 20 years

Hudbay reviews its depreciation methods, remaining useful lives and residual values at least annually and accounts for changes in estimates prospectively.

vi.   Commercial production:

Commercial production is the level of activities intended by management for a mine, or a mine and mill complex, to be capable of operating in the manner intended by management. Hudbay considers a range of factors when determining the level of activity that represents commercial production for a particular project, including a predetermined percentage of design capacity for the mine and mill; achievement of continuous production, ramp-ups, or other output; or specific factors such as recoveries, grades, or inventory build-ups. In a phased mining approach, management may consider achievement of specific milestones at each phase of completion. In a non-phased mining approach, management considers average actual metrics that are at least 60% of average design capacity or plan over a continuous period. Management assesses the operation's ability to sustain production over a period of approximately one to three months, depending on the complexity related to the stability of continuous operation. Commercial production is considered to have commenced, and depreciation expense is recognized, at the beginning of the month after criteria have been met.

vii.     Capitalized borrowing costs:

The Company capitalizes borrowing costs that are directly attributable to the acquisition, construction or production of qualifying assets, which are assets that necessarily take a substantial period of time, generally one year or more, to get ready for their intended use or sale. Capitalization of borrowing costs ceases once the qualifying assets commence commercial production or are otherwise ready for their intended use or sale.

Where funds are borrowed specifically to finance a project, the amount capitalized represents the actual borrowing costs incurred. Where the funds used to finance a project form part of general borrowings, the amount capitalized is calculated using a weighted average of interest rates applicable to relevant general borrowings of Hudbay during the period, to a maximum of actual borrowing costs incurred. Investment income earned by temporarily investing specific borrowings pending their expenditure on qualifying assets is deducted from the borrowing costs eligible for capitalization. Capitalization of interest is suspended during extended periods in which active development is interrupted.

All other borrowing costs are recognized in the consolidated income statements in the period in which they are incurred.

viii.     Capitalized stripping costs:

Costs associated with stripping activities in an open pit mine are capitalized to inventory and recorded through cost of sales unless the stripping activity can be shown to improve access to further quantities of ore that will be mined in future periods, in which case, the stripping costs are capitalized to property, plant and equipment. Capitalized stripping costs are included in "mining properties" within property, plant and equipment.

Capitalized stripping costs are depreciated using a units-of-production method over the expected reserves within a given phase of mine development.

Impairment of non-financial assets [Policy Text Block]

(j)  Impairment of non—financial assets:

At the end of each reporting period, Hudbay reviews the carrying amounts of property, plant and equipment, exploration and evaluation assets and intangible assets - computer software to determine whether there is any indication of impairment. If any such indication exists, the Company estimates the recoverable amount of the asset in order to determine the extent of the impairment loss, if any. Hudbay generally assesses impairment at the level of CGUs, which are the smallest identifiable groups of assets that generate cash inflows that are largely independent of cash inflows from other assets.

Hudbay's CGUs consist of Manitoba, Peru, Arizona and greenfield exploration and evaluation assets.

The Company allocates near mine exploration and evaluation assets to CGUs based on their operating segment, geographic location and management's intended use for the property. Near mine exploration and evaluation assets are allocated to CGUs separate from those containing producing or development-phase assets, except where such exploration and evaluation assets have the potential to significantly affect the future production of producing or development-phase assets.

Goodwill, if recorded, is tested for impairment annually and whenever there is an indication that the asset may be impaired.

Where an indicator of impairment exists, a formal estimate of the recoverable amount of the asset or CGU is made. The recoverable amount is the higher of the fair value less costs of disposal and value in use:

- Fair value less costs of disposal is the amount obtainable from the sale of the asset or CGU in an arm's length transaction between knowledgeable, willing parties, less costs of disposal. Fair value for mineral assets is often determined as the present value of the estimated future cash flows expected to arise from the continued use of the asset, including any expansion prospects, and its eventual disposal, using assumptions that an independent market participant may take into account. These cash flows are discounted by an appropriate discount rate that reflects current market assessments of the time value of money and the risks specific to the asset to arrive at a net present value of the asset.

-     Value in use is determined as the present value of the estimated future cash flows expected to arise from the continued use of the asset or CGU in its present form and its eventual disposal, discounted using a pre-tax rate that reflects current market assessments of the time value of money and risks specific to the asset for which estimates of future cash flows have not been adjusted. Value in use calculations apply assumptions specific to the Company's continued use and cannot take into account future development. These assumptions are different to those used in calculating fair value, and consequently the value in use calculation is likely to give a different result to a fair value calculation.

Hudbay estimates future cash flows based on estimated future recoverable mine production, expected sales prices (considering current and historical commodity prices, price trends and related factors), production levels and cash costs of production, all based on detailed engineering LOM plans. Future recoverable mine production is determined from reserves and resources after taking into account estimated dilution and recoveries during mining, and estimated losses during ore processing and treatment. Estimates of recoverable production from measured, indicated and inferred mineral resources not included in the LOM plan are assessed for economic recoverability and may also be included in the valuation of fair value less costs of disposal. Gains from the expected disposal of assets are not included in estimated future cash flows. Assumptions underlying future cash flow estimates are subject to risks and uncertainties. Changes in estimates may affect the expected recoverability of the Company's investments in mining properties.

If the carrying amount of an asset or CGU exceeds its recoverable amount, the carrying amount is reduced to the recoverable amount, and an impairment loss is recognized in the consolidated income statements in the expense category consistent with the function of the impaired asset or CGU. Hudbay presents impairment losses on the consolidated income statements as part of results from operating activities. Impairment losses recognized in respect of a CGU are allocated first to reduce the carrying amount of any goodwill allocated to the CGU and then to reduce the carrying amounts of other assets in the CGU on a pro-rata basis for depreciable assets.

The Company assesses previously recognized impairment losses each reporting date for any indications that the losses have decreased or no longer exist. Such an impairment loss is reversed, in full or in part, if there have been significant changes with a positive effect on the estimates used to determine the recoverable amount. An impairment loss is reversed only to the extent that the asset's carrying amount does not exceed the carrying amount that would have been determined, net of depreciation or amortization, if no impairment loss had been recognized for the asset in prior years. Such reversals of impairment losses are recognized in the consolidated income statements. An impairment loss recognized in relation to goodwill is not reversed for subsequent increases in the recoverable amount.

Assets held for sale [Policy Text Block]

(k)     Assets held for sale:

The Company classifies non-current assets, or disposal groups consisting of assets and liabilities, as held for sale when it expects to recover their carrying amounts primarily through sale rather than through continuing use. To meet criteria to be held for sale, the sale must be highly probable, and the assets or disposal groups must be available for immediate sale in their present condition. Hudbay must be committed to a plan to sell the assets or disposal group, and the sale should be expected to qualify for recognition as a completed sale within one year from the date of classification.

The Company measures assets or disposal groups at the lower of their carrying amount and fair value less costs of disposal. Impairment losses on initial classification as held for sale and subsequent gains and losses on remeasurement are recognized in the consolidated income statements; however, gains are not recognized in excess of any cumulative impairment loss. Any impairment loss on a disposal group first is allocated to goodwill, and then to remaining assets and liabilities on pro rata basis, except that no loss is allocated to inventories, financial assets, deferred tax assets, employee benefit assets or investment property. Upon classifying assets or disposal groups as held for sale, Hudbay presents the assets separately as a single amount and the liabilities separately as a single amount on the consolidated balance sheets. When an asset no longer meets the criteria for classification as an asset held for sale, the Company records the asset at the lower of its recoverable amount and the carrying amount before the asset was classified as held for sale.

Pension and other employee benefits [Policy Text Block]

(l)      Pension and other employee benefits:

Hudbay has non-contributory and contributory defined benefit programs for the majority of its Canadian employees. The defined benefit pension benefits are based on years of service and final average salary for the salaried plans and are based on a flat dollar amount combined with years of service for the hourly plans. The Company provides non pension health and other post-employment benefits to certain active employees and pensioners (post-employment benefits) and also provides disability income, health benefits and other post-employment benefits to hourly and salaried disabled employees (other long-term employee benefits).

Hudbay accrues its obligations under the defined benefit plans as the employees render the services necessary to earn the pension and post-employment benefits. The actuarial determination of the accrued benefit obligations for pensions and post-employment benefits uses the projected benefit method pro-rated on service (which incorporates management's best estimate of future salary levels, other cost escalation, retirement ages of employees and other actuarial factors). For other long-term employee benefits, the Company recognizes the full cost of the benefit obligation at the time the employee becomes disabled. Actuarial advice is provided by external consultants.

For the funded defined benefit plans, Hudbay recognizes the deficit or excess of the fair value of plan assets over the present value of the defined benefit obligation as a liability or an asset in the consolidated balance sheets. However, the Company recognizes an excess of assets only to the extent that it represents a future economic benefit which is available in the form of refunds from the plan or reductions in future contributions to the plan. When these criteria are not met, it is not recognized but is disclosed in the notes to the consolidated financial statements. Impacts of minimum funding requirements in relation to past service are considered when determining the balance sheet position.

Defined benefit costs are categorized as follows:

- Service costs (including current service cost, past service cost, as well as gains and losses on curtailments and settlements and administration costs),

- Net interest expense or income, and

- Remeasurement

The first two components of defined benefit costs shown above are recognized in the consolidated income statements. Past service cost is recognized in the consolidated income statements in the period of a plan amendment. Net interest is calculated by applying the discount rate at the beginning of the period to the net defined benefit liability or asset.

Remeasurement, comprising actuarial gains and losses, the effect of changes to the asset ceiling (if applicable) and the return on plan assets (excluding interest), is reflected immediately in the consolidated balance sheets with a gain or loss recognized in OCI in the period in which they occur. Remeasurement recognized in OCI is reflected in the remeasurement reserve and will not be reclassified to the consolidated income statements. For the other long-term employee benefits plan, remeasurements are recognized immediately in the consolidated income statements.

Actuarial determinations used in estimating obligations relating to these plans incorporate assumptions using management's best estimates of factors including plan performance, salary escalation, retirement dates of employees and healthcare cost escalation rates. Due to the complexity of the valuation, the underlying assumptions and its long-term nature, a defined benefit obligation is highly sensitive to changes in these assumptions. All assumptions are reviewed at each reporting date. In determining the appropriate discount rate, management considers the interest rates on corporate bonds in the respective currency with at least an AA rating, with extrapolated maturities corresponding to the expected duration of the defined benefit obligation. The mortality rate is based on publicly available mortality tables for the specific country. Future salary increases and pension increases are based on expected future inflation rates for the respective country.

Hudbay also has defined contribution plans providing pension benefits for certain of its salaried employees and certain of its US employees utilizing 401K plans. The Company recognizes the cost of the defined contribution plans based on the contributions required to be made during each period.

Termination benefits are recognized as an expense when Hudbay is committed demonstrably, without realistic possibility of withdrawal, to a formal detailed plan to either terminate employment before the normal retirement date, or to provide termination benefits as a result of an offer made to encourage voluntary redundancy. Termination benefits for voluntary redundancies are recognized as an expense if the Company has made an offer of voluntary redundancy, it is probable that the offer will be accepted, and the number of acceptances can be estimated reliably. Benefits that are payable more than one year after the reporting period are discounted to their present value.

Provisions [Policy Text Block]

(m)    Provisions:

Provisions are recognized when Hudbay has a present obligation (legal or constructive) as a result of a past event, it is probable that an outflow of resources will be required to settle the obligation, and a reliable estimate can be made. The provisions are recorded as management's best estimate of the amount required to settle an obligation.

Provisions are stated at their present value, which is determined by discounting the expected future cash flows at a pre-tax rate that reflects current market assessments of the time value of money and the risks specific to the liability.

Decommissioning, restoration and similar liabilities

Provisions are recorded for legal and constructive obligations associated with the future costs of rehabilitating the Company's current and previous operating and development sites. Such costs are associated with decommissioning and restoration activities such as dismantling and removing structures, rehabilitating mines and tailings, and reclamation and re-vegetation of affected areas.

The present value of estimated costs is recorded in the period in which the asset is installed or the environment is disturbed and a reasonable estimate of future costs and discount rates can be made. The provision is discounted using a risk-free rate, and estimates of future cash flows are adjusted to reflect risk.

Subsequent to the initial measurement, the obligation is adjusted to reflect the passage of time and changes in the estimated future cash flows underlying the obligation. The increase in the provision due to the passage of time is recognized as finance expense, whereas increases and decreases due to changes in the estimated future cash flows, which are not the result of current inventory production, are capitalized and depreciated over the life of the related asset. Actual costs incurred upon settlement of the site restoration obligation are charged against the provision to the extent the provision was established for those costs. Upon settlement of the liability, a gain or loss may be recorded. For closed sites, changes to estimated costs are recognized immediately in the consolidated income statements within other operating expenses.

Hudbay assesses the reasonableness of its estimates and assumptions each year and when conditions change, the estimates are revised accordingly. Judgement is required to determine the scope of future decommissioning and restoration activities, as well as best available estimates and assumptions including discount rates, expected timing of decommissioning and restoration costs, inflationary factors and market risks. Changes in cost estimates, which may arise from changes in technology and pricing of the individual components of the cost may result in offsetting changes to the asset and liability and corresponding changes to the associated depreciation and finance costs. In view of the uncertainties concerning these future obligations, the ultimate timing and cost of reclamation and mine closure may differ materially from these estimates.

If the change in estimate results in a significant increase in the decommissioning liability and therefore an addition to the carrying value of the asset, the Company considers whether this is an indication of impairment of the asset as a whole and, if so, tests for impairment in accordance with IAS 36, Impairment of Assets. If, for mature mines, the revised mine assets net of decommissioning and restoration liabilities exceeds the recoverable value, that portion of the increase is charged directly to expense as an impairment loss.

In view of the uncertainties concerning environmental remediation, the ultimate cost of decommissioning and restoration liabilities could differ materially from the estimated amounts provided. The estimate of the total liability is subject to change based on amendments to laws and regulations and as new information concerning Hudbay's operations becomes available. Future changes, if any, to the estimated total liability as a result of amended requirements, laws, regulations and operating assumptions, as well as discount rates, may be significant and would be recognized prospectively as a change in accounting estimate, when applicable. Environmental laws and regulations are continually evolving in all regions in which the Company operates. Hudbay is not able to determine the impact, if any, of environmental laws and regulations that may be enacted in the future on its results of operations or financial position due to the uncertainty surrounding the ultimate form that such future laws and regulations may take.

Onerous contracts

A contract is considered to be onerous when the unavoidable costs of meeting obligations under the contract exceed the economic benefits expected to be received under it. Hudbay records a provision for any onerous contracts at the lesser of costs to comply with a contract and costs to terminate it.

Restructuring provisions

A provision for restructuring is recognized when management, with appropriate authority within Hudbay, has approved a detailed and formal restructuring plan, and the restructuring has either commenced or has been announced publicly. Future operating costs are not provided for.

Financial Instruments [Policy Text Block]

(n)  Financial instruments:

Non-derivative financial instruments are initially recognized at fair value plus, in the case of a financial asset or financial liability not measured at fair value through profit or loss, directly attributable transaction costs. Measurement in subsequent periods depends on the financial instrument's classification. Hudbay uses trade date accounting for regular way purchases or sales of financial assets. The Company determines the classification of its financial instruments and non-financial derivatives at initial recognition.

Financial assets and liabilities are offset and the net amount presented in the consolidated balance sheets when, and only when, Hudbay has a legal right to offset the amounts and intends either to settle on a net basis or to realize the asset and settle the liability simultaneously.

The classification of financial assets is based on the results of the contractual characteristics test and the business model assessment which will result in the financial asset being classified as either: amortized cost, fair value through profit or loss ("FVTPL") or fair value through other comprehensive income ("FVTOCI").

i.      Non-derivative financial instruments - classification:

Financial assets at fair value through profit or loss

Provisionally priced copper sales receivables, warrants and investments in securities of junior mining companies are classified as financial assets at fair value through profit or loss and are measured at fair value. The unrealized gains or losses related to changes in fair value are reported in other finance income/expense in the consolidated income statements.

Amortized cost

Cash, certain receivables, payables and restricted cash are classified as and measured at amortized cost and are carried at amortized cost using the effective interest rate method, less impairment losses, if any.

Non-derivative financial liabilities

Accounts payable and senior unsecured notes are initially recognized at fair value and subsequently accounted for at amortized cost, using the effective interest method. The amortization of senior unsecured notes issue costs is calculated using the effective interest rate method.

ii.       Derivatives:

Derivatives are initially recognized at fair value when Hudbay becomes a party to the derivative contract and are subsequently re-measured to fair value at the end of each reporting period. The resulting gain or loss is recognized in the consolidated income statements immediately unless the derivative is designated and effective as a hedging instrument. Derivatives with positive fair value are recognized as assets; derivatives with negative fair value are recognized as liabilities.

Contracts to buy or sell non-financial items that meet the definition of a derivative but were entered into and are held in accordance with the Company's expected purchase, sale or usage requirements are not recognized as derivatives. Such contracts are recorded as non-derivative purchases and sales.

iii.      Embedded derivatives:

Hudbay considers whether a contract contains an embedded derivative when it becomes a party to the contract. Derivatives embedded in other financial liabilities or other host contracts are treated as separate derivatives when their risks and characteristics are not closely related to those of the host contracts and the host contracts are not measured at FVTPL.

iv.       Fair values of financial instruments:

The fair value of a financial instrument is the amount for which an asset could be exchanged, or a liability settled, between knowledgeable, willing parties in an arm's length transaction.

Fair values of financial instruments traded in active markets are determined based on quoted market prices, where available. Bid prices are generally used for assets held or liabilities to be issued; asking prices are generally used for assets to be acquired or liabilities held.

For financial instruments not traded in an active market, fair values are determined based on appropriate valuation techniques. Such techniques may include discounted cash flow analysis, using recent arm's length market transactions, reference to the current fair value of another instrument that is substantially the same, and other valuation models.

The Company applies a hierarchy to classify valuation methods used to measure financial instruments carried at fair value. Levels 1 to 3 are defined based on the degree to which fair value inputs are observable and have a significant effect on the recorded fair value, as follows:

-  Level 1: Quoted prices (unadjusted) in active markets for identical assets or liabilities;

-  Level 2: Valuation techniques use significant observable inputs, either directly (i.e. as prices) or indirectly (i.e. derived from prices), or valuations are based on quoted prices for similar instruments; and,

-  Level 3: Valuation techniques use significant inputs that are not based on observable market data (unobservable inputs).

An analysis of fair values of financial instruments is provided in note 27.

v.        Impairment of financial instruments:

Hudbay recognizes loss allowances for Expected Credit Losses ("ECL") for trade receivables not measured at FVTPL.

Loss allowances for trade receivables are measured at an amount equal to lifetime ECL. ECL is a probability-weighted estimate measured at the present value of all cash shortfalls including the impact of forward-looking information.

Hudbay has established a provision based on the Company's historical credit loss experience, adjusted for forward-looking factors specific to the debtors and the economic environment.

The loss allowance is presented as a deduction to trade receivables in the balance sheets.

vi.       Derecognition of financial instruments:

Hudbay derecognizes financial assets when the contractual rights to the cash flows from the assets expire, or when the Company transfers the rights to receive the contractual cash flows on the financial assets in a transaction in which substantially all the risks and rewards of ownership of the financial asset are transferred. Any interest in the transferred financial assets that is created or retained by Hudbay is recognized as a separate asset or liability.

Hudbay derecognizes financial liabilities when its contractual obligations are discharged, cancelled or expire or when its terms are modified and the cash flows of the modified liability are substantially different.

Taxation [Policy Text Block]

(o)  Taxation:

Current Tax

Current income tax assets and liabilities for the current and prior periods are measured at the amount expected to be recovered from or paid to the taxation authorities. The tax rates and tax laws used to compute the amount are those that are enacted or substantively enacted by the balance sheet date.

Hudbay is subject to income taxes in numerous jurisdictions. Significant judgement is required in determining the worldwide provision for income taxes due to the complexity of legislation. There are many transactions and calculations for which the ultimate tax determination is uncertain during the ordinary course of business. The Company recognizes liabilities for anticipated tax issues based on estimates of whether additional taxes will be due. Where the final tax outcome of these matters is different from the amounts that were initially recorded, such differences will affect the income tax and deferred tax provisions in the period in which such determination is made.

Additionally, future changes in tax laws in the jurisdictions in which Hudbay operates could limit the ability of the Company to obtain tax deductions in future periods.

Deferred Tax

Deferred tax is recognized using the balance sheet method in respect of temporary differences at the balance sheet date between the tax basis of assets and liabilities, and their carrying amounts for financial reporting purposes.

Deferred income tax liabilities are recognized for all taxable temporary differences, except:

- where the deferred income tax liability arises from the initial recognition of goodwill, or the initial recognition of an asset or liability in a transaction that is not a business combination and, at the time of the transaction, affects neither the accounting profit nor taxable profit or loss; and

- in respect of taxable temporary differences associated with investments in subsidiaries, associates and interests in joint ventures, where the timing of the reversal of the temporary differences can be controlled and it is probable that the temporary differences will not reverse in the foreseeable future.

Deferred income tax assets are recognized for all deductible temporary differences, carry-forward of unused tax assets and unused tax losses, to the extent that it is probable that taxable profit will be available against which the deductible temporary differences, and the carry-forward of unused tax assets and unused tax losses can be utilized, except:

- where the deferred income tax asset relating to the deductible temporary difference arises from the initial recognition of an asset or liability in a transaction that is not a business combination and, at the time of the transaction, affects neither the accounting profit nor taxable profit or loss; and

- in respect of deductible temporary differences associated with investments in subsidiaries, associates and interests in joint ventures, deferred tax assets are recognized only to the extent that it is probable that the temporary differences will reverse in the foreseeable future and taxable profit will be available against which the temporary differences can be utilized.

To the extent that it is probable that taxable profit will be available to offset the deductible temporary differences, Hudbay recognizes the deferred tax asset regarding the temporary difference on decommissioning, restoration and similar liabilities and recognizes the corresponding deferred tax liability regarding the temporary difference on the related assets.

The carrying amount of deferred income tax assets is reviewed at each balance sheet date and reduced to the extent that it is no longer probable that sufficient taxable profit will be available to allow all or part of the deferred income tax asset to be utilized. Unrecognized deferred income tax assets are reassessed at each balance sheet date and are recognized to the extent that it has become probable that future taxable profit will be available to allow the deferred tax asset to be recovered.

Judgement is required in determining whether deferred tax assets are recognized on the consolidated balance sheets. Deferred tax assets, including those arising from unutilized tax losses, require management to assess the likelihood of taxable profit in future periods in order to utilize recognized deferred tax assets. Estimates of future taxable income are based on forecast cash flows from operations and the application of existing tax laws in each jurisdiction. To the extent that future cash flows and taxable income differ significantly from estimates, the ability to realize the net deferred tax assets recorded at the balance sheet date could be affected.

Deferred tax is measured on an undiscounted basis at the tax rates that are expected to apply in the periods in which the asset is realized or the liability is settled, based on tax rates and tax laws enacted or substantively enacted at the balance sheet date.

Deferred income tax assets and deferred income tax liabilities are offset if a legally enforceable right exists to offset current tax assets against current tax liabilities and the deferred income taxes relate to the same taxable entity and the same taxation authority.

Current and deferred taxes relating to items recognized outside profit or loss (whether in other comprehensive income or directly in equity) are recognized outside profit or loss and not in the consolidated income statements. Mining taxes and royalties are treated and disclosed as current and deferred taxes if they have the characteristics of an income tax.

Share capital and reserves [Policy Text Block]

(p)  Share capital and reserves:

Transaction costs

Transaction costs directly attributable to equity transactions are recognized as a deduction from equity.

Other capital reserve

The other capital reserve is used for equity-settled share-based compensation and includes amounts for stocks options granted and not exercised.

Foreign currency translation reserve

The foreign currency translation reserve is used to record exchange differences arising from the translation of the financial statements of foreign operations. Exchange differences arising from the translation of the financial statements of foreign operations form part of the net investment in the foreign operation. Translation gains and losses remain in the reserve until disposal of all or a portion of the foreign operation.

Share-based payments [Policy Text Block]

(q)  Share-based compensation:

Hudbay offers a Deferred Share Unit ("DSU") plan for non-employee members of the Board of Directors, a Restricted Share Unit ("RSU") plan for employees, a Performance Share Unit ("PSU") plan for employees and a stock option plan for employees. These plans are included in provisions on the consolidated balance sheets and further described in note 24. Changes in the fair value of the liabilities are recorded in the consolidated income statements.

Cash-settled transactions, consisting of DSUs, RSUs and PSUs, are initially measured at fair value and recognized as an obligation at the grant date. The liabilities are remeasured to fair value at each reporting date up to and including the settlement date, with changes in fair value recognized in the consolidated income statements. Hudbay values the liabilities based on the change in the Company's share price. Additional DSUs, RSUs and PSUs are credited to reflect dividends paid on Hudbay common shares over the vesting period. The current portion of the liability reflects those grants that have vested or that are expected to vest within twelve months.

DSUs vest on the grant date and are redeemable when a participant is no longer a member of the Board of Directors. Issue and redemption prices of DSUs are based on the average closing price of the Company's common shares for the five trading days prior to issuance or redemption.

RSUs and PSUs are issued under Hudbay's Long Term Equity Plan ("LTEP Plan") and vest on or before December 31st of the third calendar year after the year in which the services corresponding to such share unit award were performed. RSUs and PSUs granted under the LTEP Plan may be settled in the form of the Company's common shares or, at the option of Hudbay, the cash equivalent based on the market price of the common shares as of the vesting date. Hudbay has historically settled RSUs in cash. Except in specified circumstances, RSUs and  PSUs terminate when an employee ceases to be employed by the Company. Valuations of RSUs and PSUs reflect estimated forfeitures.

Equity-settled transactions with employees relate to stock options and are measured by reference to the fair value at the earlier of the grant date and the date that the employee unconditionally became entitled to the award. Fair value is determined using a Black-Scholes option pricing model, which relies on estimates of the future risk-free interest rate, future dividend payments, future share price volatility and the expected average life of the options. Hudbay believes this model adequately captures the substantive features of the option awards and is appropriate to calculate their fair values. The fair value determined at the grant date is recognized over the vesting period in accordance with vesting terms and conditions, with a corresponding increase to other capital reserves. The amount recognized as an expense is adjusted to reflect the number of awards for which the related service and non-market vesting conditions are expected to be met.

Earnings per share [Policy Text Block]

(r) Earnings per share:

The Company presents basic and diluted earnings (loss) per share ("EPS") data for its common shares. Basic EPS is calculated by dividing the profit or loss attributable to common shareholders of the Company by the weighted average number of common shares outstanding during the period. Diluted EPS is determined by adjusting the profit or loss attributable to common shareholders and the weighted average number of common shares outstanding for the effects of all dilutive potential common shares, which previously consisted of stock options granted to employees and warrants.

When calculating earnings per share for periods where the Company has a loss, Hudbay's calculation of diluted earnings per share excludes any incremental shares from the assumed conversion of stock options as they would be anti-dilutive.

Leases [Policy Text Block]

(s) Leases:

Leases, under which substantially all the risks and rewards incidental to ownership of the leased item are transferred to Hudbay, are capitalized as assets at the inception of the lease at the lower of fair value or the present value of the minimum lease payments. Lease payments are apportioned between finance charges and the reduction of the liability so as to achieve a constant periodic rate of interest on the remaining balance of the liability. Finance charges are reflected in the consolidated income statements as finance costs.

Non-ROU lease payments are recognized as an expense in the consolidated income statements on a straight-line basis over the lease term.

Segment reporting [Policy Text Block]

(t) Segment reporting:

An operating segment is a component of the Company that engages in business activities from which it may earn revenue and incur expenses and for which discrete financial information is available. Hudbay's chief executive officer regularly reviews the operating results of each operating segment to make decisions about resources to be allocated to the segment and assess its performance. In determining operating segments, Hudbay considers location and decision-making authorities. Refer to note 31.

Statements of cash flows [Policy Text Block]

(u) Statement of cash flows:

Hudbay presents interest paid and dividends paid as financing activities, except if the interest is related to capitalized borrowing costs, and interest received is presented as an investing activity in the consolidated statement of cash flow. Hudbay presents the consolidated statement of cash flows using the indirect method.

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Significant accounting policies (Tables)

12 Months Ended

Dec. 31, 2020

Significant Accounting Policies [Abstract]

Disclosure of detailed information about estimated useful life or depreciation rate [Table Text Block]

•	Capital works in progress		- not depreciated
•	Mining properties		- unit-of- production
•	Mining asset		- unit-of- production
•	Plant and Equipment
	◦	Equipment	- straight-line over 1 to 20 years
	◦	Other plant assets	- straight-line over 1 to 20 years/unit-of-production
•	ROU Assets		- straight -line over 1 to 20 years

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Acquisition of remaining interest in the Rosemont project (Tables)

12 Months Ended

Dec. 31, 2020

Disclosure of detailed information about business combination [abstract]

Disclosure of detailed information about acquisition date fair value of consideration paid [Table Text Block]

Cash	$	45,000
Present value of future cash installments		23,557
Total consideration	$	68,557

Disclosure of detailed information about acquisition of remaining asset and liabilities [Table Text Block]

Current assets	$	343
Non-current assets		68,904
Liabilities		(690	)
Net assets acquired	$	68,557

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Revenue and expenses (Tables)

12 Months Ended

Dec. 31, 2020

Analysis of income and expense [abstract]

Disclosure of detailed information about revenue [Table Text Block]

		Year ended December 31,
		2020			2019
Copper	$	563,910		$	786,332
Zinc		264,106			284,897
Gold		180,949			120,366
Silver		25,986			29,315
Molybdenum		25,627			31,270
Other		5,619			4,760
		1,066,197			1,256,940
Non-cash streaming arrangement items 1
Amortization of deferred revenue - gold		27,854			32,028
Amortization of deferred revenue - silver		39,409			60,370
Amortization of deferred revenue - variable consideration adjustments - prior periods		6,668			(16,295	)
		73,931			76,103
Pricing and volume adjustments 2		9,178			(12,123	)
		1,149,306			1,320,920
Treatment and refining charges		(56,888	)		(83,481	)
	$	1,092,418		$	1,237,439
1 See note 18.
2 Pricing and volume adjustments represent mark-to-market adjustments on initial estimate of provisionally priced sales, realized and unrealized changes to fair value for non-hedge derivative contracts and adjustments to originally invoiced weights and assays.

Disclosure of depreciation and amortization expense [Table Text Block]

		Year ended December 31,
		2020		2019
Cost of sales	$	361,827	$	344,555
Selling and administrative expenses		1,776		2,079
	$	363,603	$	346,634

Disclosure of detailed information about share-based payment expenses (recoveries) [Table Text Block]

		Cash-settled								Total share-based compensation expense
		RSUs		DSUs		PSUs		Stock options
Year ended December 31, 2020
Cost of sales	$	1,400	$	—	$	—	$	—	$	1,400
Selling and administrative		4,872		5,149		1,987		1,122		13,130
Other expenses		478		—		—		—		478
	$	6,750	$	5,149	$	1,987	$	1,122	$	15,008
Year ended December 31, 2019
Cost of sales	$	400	$	—	$	—	$	—	$	400
Selling and administrative		928		1,157		—		—		2,085
Other expenses		229		—		—		—		229
	$	1,557	$	1,157	$	—	$	—	$	2,714

Disclosure of detailed information about other operating expense [Table Text Block]

		Year ended December 31,
		2020		2019
Regional costs	$	3,602	$	3,780
Loss on disposal of property, plant and equipment		5,088		4,807
Closure cost adjustment - non-producing properties		2,721		2,289
Allocation of community costs		2,880		2,216
Write down of UCM receivable		—		25,978
Pampacancha delivery obligation		—		7,499
Other		3,292		4,547
	$	17,583	$	51,116

Disclosure of detailed information about impairment [Table Text Block]

		Arizona
Pre-tax impairment to:
Property, plant & equipment	$	322,249
Tax impact - (recovery)		(80,143	)
After-tax impairment charge	$	242,106

Disclosure of detailed information about employee benefits expense [Table Text Block]

		Year ended December 31,
		2020		2019
Current employee benefits	$	179,486	$	171,173
Share-based compensation (notes 6c, 19, 24)
Equity settled stock options		1,122		—
Cash-settled restricted share units		6,750		1,557
Cash-settled deferred share units		5,149		1,157
Cash-settled performance share units		1,987		—
Employee share purchase plan		1,783		1,645
Post-employee pension benefits
Defined benefit plans		11,671		10,643
Defined contribution plans		1,774		1,635
Other post-retirement employee benefits		9,305		8,457
Termination benefits		582		628
	$	219,609	$	196,895

Disclosure of detailed information about finance income and expenses [Table Text Block]

		Year ended December 31,
		2020			2019
Net interest expense on long-term debt
Interest expense on long-term debt	$	82,712		$	78,265
Interest capitalized		—			(9,890	)
		82,712			68,375
Accretion on streaming arrangements (note 18)
Current year additions		60,362			63,725
Variable consideration adjustments - prior periods		(3,692	)		6,047
		56,670			69,772
Change in fair value of financial assets and liabilities at fair value through profit or loss
Embedded derivatives		(45,387	)		3,708
Gold prepayment liability		20,141			—
Investments		(4,124	)		4,539
		(29,370	)		8,247
Other net finance costs
Net foreign exchange (gains) losses		(1,644	)		1,388
Accretion on community agreements measured at amortized cost		3,641			1,222
Unwinding of discounts on provisions		3,543			4,392
Withholding taxes		8,267			8,100
Premium paid on redemption of notes (note 17)		7,252			—
Write-down of unamortized transaction costs (note 17)		3,817			—
Other finance expense		8,826			11,027
Interest income		(1,812	)		(8,527	)
		31,890			17,602
Net finance expense	$	141,902		$	163,996

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Trade and other receivables (Tables)

12 Months Ended

Dec. 31, 2020

Trade and other receivables [abstract]

Disclosure of detailed information about trade and other receivables [Table Text Block]

		Dec. 31, 2020		Dec. 31, 2019
Current
Trade receivables	$	107,787	$	87,332
Statutory receivables		28,445		16,543
Other receivables		4,967		2,119
		141,199		105,994
Non-current
Taxes receivable		16,941		17,669
Other receivables		1,627		1,595
		18,568		19,264
	$	159,767	$	125,258

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Inventories (Tables)

12 Months Ended

Dec. 31, 2020

Disclosure Of Inventories [Abstract]

Disclosure of detailed information about inventories [Table Text Block]

		Dec. 31, 2020		Dec. 31, 2019
Current
Stockpile	$	13,906	$	10,396
Work in progress		6,364		14,420
Finished goods		72,923		62,230
Materials and supplies		49,912		51,774
		143,105		138,820
Non-current
Stockpile		16,704		14,626
Materials and supplies		5,302		4,829
		22,006		19,455
	$	165,111	$	158,275

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Other financial assets (Tables)

12 Months Ended

Dec. 31, 2020

Disclosure of financial assets [abstract]

Disclosure of detailed information about other financial assets [Table Text Block]

		Dec. 31, 2020		Dec. 31, 2019
Current
Derivative assets	$	2,736	$	1,712
Restricted cash		337		337
		3,073		2,049
Non-current
Investments at fair value through profit or loss		15,669		11,287
	$	18,742	$	13,336

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Intangibles and other assets (Tables)

12 Months Ended

Dec. 31, 2020

Disclosure of detailed information about intangible assets [abstract]

Disclosure of detailed information about intangible assets [Table Text Block]

	Dec. 31, 2020		Dec. 31, 2019
Cost
Balance, beginning of year	$	21,538	$	18,557
Additions		1,466		2,325
Disposals		—		(96	)
Effects of movement in exchange rates		346		752
Balance, end of year		23,350		21,538
Accumulated amortization
Balance, beginning of year		16,511		14,395
Additions		1,138		1,606
Disposals		—		(96	)
Effects of movement in exchange rates		292		606
Balance, end of year		17,941		16,511
Intangibles, net book value	$	5,409	$

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Property, plant and equipment (Tables)

12 Months Ended

Dec. 31, 2020

Disclosure of detailed information about property, plant and equipment [abstract]

Disclosure of detailed information about property, plant and equipment [Table Text Block]

Dec. 31, 2020		Exploration and evaluation assets		Capital works in progress			Mining properties			Plant and equipment			Plant and equipment- ROU assets			Total
Balance, Jan. 1, 2020	$	69,903	$	733,874		$	2,146,583		$	2,653,752		$	201,972		$	5,806,084
Additions		809		256,251			311			28,523			17,759			303,653
Capitalized stripping and development		—		—			83,137			—			—			83,137
Decommissioning and restoration		—		263			6,849			39,680			—			46,792
Interest capitalized		—		—			—			—			—			—
Transfers and other movements		8,040		(36,668	)		(41,256	)		70,777			(893	)		—
Disposals		—		—			—			(19,681	)		(5,884	)		(25,565	)
Effects of movements in exchange rates		307		3,442			21,837			20,668			1,349			47,603
Balance, Dec. 31, 2020		79,059		957,162			2,217,461			2,793,719			214,303			6,261,704
Accumulated depreciation
Balance, Jan. 1, 2020		—		—			963,530			1,069,687			110,308			2,143,525
Depreciation for the year		—		—			146,113			200,632			23,351			370,096
Disposals		—		—			—			(14,038	)		(2,475	)		(16,513	)
Effects of movement in exchange rates		—		—			16,631			15,300			1,010			32,941
Balance, Dec. 31, 2020		—		—			1,126,274			1,271,581			132,194			2,530,049
Net book value	$	79,059	$	957,162		$	1,091,187		$	1,522,138		$	82,109		$	3,731,655

Dec. 31, 2019		Exploration and evaluation assets		Capital works in progress			Mining properties			Plant and equipment			Plant and equipment- ROU assets1			Total
Balance, January 1, 2019	$	52,206	$	873,781		$	1,998,439		$	2,473,176		$	180,151		$	5,577,753
Additions		17,016		109,372			—			33,309			22,158			181,855
Acquisitions (note 5)		—		91,332			3,157			—			373			94,862
Capitalized stripping and development		—		—			103,108			—			—			103,108
Decommissioning and restoration		—		41			3,314			86,053			—			89,408
Interest capitalized		—		9,890			—			—			—			9,890
Transfers and other movements		—		(30,000	)		642			30,406			(1,048	)		—
Impairments (note 6e)		—		(322,249	)		—			—			—			(322,249	)
Disposals		—		(2,029	)		—			(10,747	)		(1,533	)		(14,309	)
Effects of movements in exchange rates		681		1,528			41,080			38,452			1,793			83,534
Other		—		2,208			(3,157	)		3,103			78			2,232
Balance, Dec. 31, 2019		69,903		733,874			2,146,583			2,653,752			201,972			5,806,084
Accumulated depreciation
Balance, January 1, 2019		—		—			780,754			872,330			89,877			1,742,961
Depreciation for the year		—		—			154,970			179,062			19,850			353,882
Disposals		—		—			—			(6,675	)		—			(6,675	)
Effects of movement in exchange rates		—		—			27,806			24,970			581			53,357
Balance, Dec. 31, 2019		—		—			963,530			1,069,687			110,308			2,143,525
Net book value	$	69,903	$	733,874		$	1,183,053		$	1,584,065		$	91,664		$	3,662,559

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Trade and other payables (Tables)

12 Months Ended

Dec. 31, 2020

Trade and other payables [abstract]

Disclosure of detailed information about trade and other payables [Table Text Block]

		Dec. 31, 2020		Dec. 31, 2019
Trade payables	$	104,598	$	68,742
Accruals and payables		72,698		80,375
Accrued interest		30,766		34,603
Exploration and evaluation payables		1,351		884
Statutory payables		23,734		7,800
	$	233,147	$	192,404

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Other liabilities (Tables)

12 Months Ended

Dec. 31, 2020

Miscellaneous current liabilities [abstract]

Disclosure of detailed information about other current liabilities [Table Text Block]

		Dec. 31, 2020		Dec. 31, 2019
Current
Provisions (note 19)	$	33,675	$	33,575
Pension liability (note 20)		13,552		12,015
Other employee benefits (note 21)		3,154		2,806
Unearned revenue		1,590		1,015
	$	51,971	$	49,411

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Other financial liabilities (Tables)

12 Months Ended

Dec. 31, 2020

Disclosure of financial liabilities [abstract]

Disclosure of detailed information about other financial liabilities [Table Text Block]

		Dec. 31, 2020		Dec. 31, 2019
Current
Derivative liabilities	$	15,312	$	10,295
Embedded derivatives (note 27d)		—		9,074
Other financial liabilities at amortized cost		9,401		8,707
		24,713		28,076
Non-current
Deferred Rosemont acquisition consideration		25,961		24,491
Gold prepayment liability		137,031		—
Other financial liabilities at amortized cost		31,386		15,293
		194,378		39,784
	$	219,091	$	67,860

Disclosure of detailed information about changes in other financial liabilities at amortized cost [Table Text Block]

Balance, January 1, 2019	$	21,361
Net additions		7,369
Disbursements		(6,351	)
Accretion		1,222
Effects of changes in foreign exchange		399
Balance, December 31, 2019	$	24,000
Net additions		116,233
Disbursements		(98,375	)
Accretion		3,641
Effects of changes in foreign exchange		(4,712	)
Balance, December 31, 2020	$	40,787

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Lease Liability (Tables)

12 Months Ended

Dec. 31, 2020

Lease liabilities [abstract]

Disclosure of detailed information about leasing activities for lessee [Table Text Block]

Balance, January 1, 2019	$	89,215
Additional capitalized leases (note 12)		22,158
Lease payments		(32,952	)
Accretion and other movements		3,526
Balance, December 31, 2019	$	81,947
Additional capitalized leases (note 12)		17,759
Lease payments		(35,980	)
Accretion and other movements		(212	)
Balance, December 31, 2020	$	63,514

 

		Dec. 31, 2020		Dec. 31, 2019
Current	$	33,473	$	32,781
Non-current		30,041		49,166
	$	63,514	$	81,947

Disclosure of detailed information about expenses recognized to leases for which exemption applied [Table Text Block]

		Year ended December 31,
		2020		2019
Short-term leases	$	40,253	$	45,745
Low value leases		353		92
Variable leases		57,389		56,152
Total	$	97,995	$	101,989

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Long-term debt (Tables)

12 Months Ended

Dec. 31, 2020

Disclosure of detailed information about borrowings [line items]

Disclosure of borrowings [Table Text Block]

		Dec. 31, 2020			Dec. 31, 2019
Senior unsecured notes (a)	$	1,139,695		$	991,558
Less: Unamortized transaction costs - revolving credit facilities (b)		(4,020	)		(6,303	)
	$	1,135,675		$	985,255

Senior unsecured notes [Member]

Disclosure of detailed information about borrowings [line items]

Disclosure of detailed information about borrowings [Table Text Block]

Balance, January 1, 2019	$	989,306
Change in fair value of embedded derivative (prepayment option)		1,079
Accretion of transaction costs and premiums		1,173
Balance, December 31, 2019	$	991,558
Addition to Principal, net of $8,176 transaction costs		591,824
Principal repayments		(400,000	)
Change in fair value of embedded derivative (prepayment option)		(47,169	)
Write-down of unamortized transaction costs		2,315
Accretion of transaction costs and premiums		1,167
Balance, December 31, 2020	$	1,139,695

Unamortized transaction costs - revolving credit facilities [Member]

Disclosure of detailed information about borrowings [line items]

Disclosure of detailed information about unamortized transaction costs revolving credit facilities [Table Text Block]

Balance, January 1, 2019	$	8,276
Accretion of transaction costs		(2,342	)
Transaction costs		369
Balance, December 31, 2019	$	6,303
Accretion of transaction costs		(3,062	)
Write-down of unamortized transaction costs		(1,502	)
Transaction costs		2,281
Balance, December 31, 2020 1	$	4,020
1 Balance, representing deferred transaction costs, is in an asset position.

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Deferred revenue (Tables)

12 Months Ended

Dec. 31, 2020

Disclosure Of Deferred Revenue [Abstract]

Disclosure of detailed information about changes in deferred revenue [Table Text Block]

Balance, January 1, 2019	$	566,078
Amortization of deferred revenue
Liability drawdown		(92,398	)
Variable consideration adjustments - prior periods		16,295
Accretion on streaming arrangements
Current year additions		63,725
Variable consideration adjustments - prior periods		6,047
Effects of changes in foreign exchange		4,009
Balance, December 31, 2019	$	563,756
Amortization of deferred revenue
Liability drawdown		(67,263	)
Variable consideration adjustments - prior periods		(6,668	)
Accretion on streaming arrangements (note 6g)
Current year additions		60,362
Variable consideration adjustments - prior periods		(3,692	)
Effects of changes in foreign exchange		189
Balance, December 31, 2020	$	546,684

Disclosure of detailed information about deferred revenue [Table Text Block]

		Dec. 31, 2020		Dec. 31, 2019
Current	$	102,782	$	86,933
Non-current		443,902		476,823
	$	546,684	$	563,756

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Provisions (Tables)

12 Months Ended

Dec. 31, 2020

Disclosure of other provisions [abstract]

Disclosure of detailed information about changes in provisions [Table Text Block]

		Decommis- sioning, restoration and similar liabilities			Deferred share units (note 24a)			Restricted share units1 (note 24a)			Performan- ce share units (note 24a)		Other			Total
Balance, January 1, 2020	$	302,116		$	3,876		$	5,477		$	—	$	2,956		$	314,425
Net additional provisions made		5,868			1,628			3,642			1,257		15			12,410
Amounts used		(18,737	)		(497	)		(2,646	)		—		(1,824	)		(23,704	)
Unwinding of discount (note 6g)		3,543			—			—			—		—			3,543
Effect of change in discount rate		43,180			—			—			—		—			43,180
Effect of foreign exchange		7,162			191			116			43		(3	)		7,509
Effect of change in share price		—			3,521			3,860			730		—			8,111
Balance, December 31, 2020	$	343,132		$	8,719		$	10,449		$	2,030	$	1,144		$	365,474

		Decommis-sioning, restoration and similar liabilities			Deferred share units (note 24a)			Restricted share units1 (note 24a)			Performance share units (note 24a)		Other			Total
Balance, January 1, 2019	$	202,024		$	4,288		$	12,201		$	—	$	411		$	218,924
Net additional provisions made		68,881			1,479			2,885			—		2,882			76,127
Amounts used		(4,136	)		(1,668	)		(9,380	)		—		(341	)		(15,525	)
Unwinding of discount (note 6g)		4,392			—			—			—		—			4,392
Effect of change in discount rate		23,635			—			—			—		—			23,635
Effect of foreign exchange		7,320			99			225			—		4			7,648
Effect of change in share price		—			(322	)		(454	)		—		—			(776	)
Balance, December 31, 2019	$	302,116		$	3,876		$	5,477		$	—	$	2,956		$	314,425

¹ Certain amounts relating to the Arizona segment are capitalized.

Disclosure of detailed information about provisions [Table Text Block]

December 31, 2020		Decommis-sioning, restoration and similar liabilities		Deferred share units (note 24a)		Restricted share units1 (note 24a)		Performance share units (note 24a)		Other		Total
Current (note 14)	$	20,308	$	8,719	$	4,648	$	—	$	—	$	33,675
Non-current		322,824		—		5,801		2,030		1,144		331,799
	$	343,132	$	8,719	$	10,449	$	2,030	$	1,144	$	365,474

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Pension obligations (Tables)

12 Months Ended

Dec. 31, 2020

Pension Obligations [Abstract]

Disclosure of additional information about defined benefit plans [Table Text Block]

		Year ended
		Dec. 31, 2020			Dec. 31, 2019
Opening defined benefit obligation:	$	243,733		$	211,512
Current service costs		11,044			9,880
Interest cost		6,569			7,156
Benefits paid from plan		(35,384	)		(16,745	)
Benefits paid from employer		(1,317	)		(934	)
Participant contributions		48			64
Effects of movements in exchange rates		2,780			11,660
Remeasurement actuarial (gains)/losses:
Arising from changes in demographic assumptions		(1,461	)		—
Arising from changes in financial assumptions		16,967			29,609
Arising from experience adjustments		(2,625	)		(2,258	)
Settlement payments from plan assets		—			(6,307	)
Loss on settlement		—			96
Closing defined benefit obligation	$	240,354		$	243,733

Disclosure of detailed information about defined benefit plans, balance by member group [Table Text Block]

		Dec. 31, 2020		Dec. 31, 2019
Active members	$	211,861	$	231,959
Deferred members		2,198		1,555
Retired members		26,295		10,219
Closing defined benefit obligation	$	240,354	$	243,733

Disclosure of detailed information about changes in fair value of plan assets [Table Text Block]

		Year ended
		Dec. 31, 2020		Dec. 31, 2019
Opening fair value of plan assets:	$	202,119		$	175,795
Interest income		5,695			6,170
Remeasurement adjustment:
Return on plan assets (excluding amounts included in net interest expense)		15,377			21,460
Contributions from the employer		12,987			11,952
Employer direct benefit payments		1,317			934
Contributions from plan participants		48			64
Benefit payment from employer		(1,317	)		(934	)
Administrative expenses paid from plan assets		(77	)		(82	)
Benefits paid		(35,384	)		(16,745	)
Settlement payments from plan assets		—			(6,307	)
Effects of changes in foreign exchange rates		2,721			9,812
Closing fair value of plan assets	$	203,486		$	202,119

Disclosure of detailed information about net defined benefit liability (asset) [Table Text Block]

		Dec. 31, 2020			Dec. 31, 2019
Present value of funded defined benefit obligation	$	220,210		$	224,364
Fair value of plan assets		(203,486	)		(202,119	)
Present value of unfunded defined benefit obligation		20,144			19,369
Net liability arising from defined benefit obligation	$	36,868		$	41,614

Disclosure of detailed information about pension obligation [Table Text Block]

		Dec. 31, 2020		Dec. 31, 2019
Pension obligation - current (note 14)	$	13,552	$	12,015
Pension obligation - non-current		23,316		29,599
Total pension obligation	$	36,868	$	41,614

Disclosure of detailed information about pension expense [Table Text Block]

		Dec. 31, 2020		Dec. 31, 2019
Service costs:
Current service cost	$	11,044	$	9,880
Loss on settlement		—		96
Total service cost		11,044		9,976
Net interest expense		874		986
Administration cost		77		82
Defined benefit pension expense	$	11,995	$	11,044
Defined contribution pension expense	$	1,791	$	1,639

Disclosure of detailed information about remeasurement on the net defined benefit liability [Table Text Block]

		Dec. 31, 2020			Dec. 31, 2019
Return on plan assets (excluding amounts included in net interest expense)	$	(15,377	)	$	(21,460	)
Actuarial gains arising from changes in demographic assumptions		(1,461	)		—
Actuarial losses arising from changes in financial assumptions		16,967			29,609
Actuarial gains arising from experience adjustments		(2,625	)		(2,258	)
Defined benefit (gain)/loss related to remeasurement	$	(2,496	)	$	5,891
Total pension cost	$	11,290		$	18,574

Disclosure of detailed information about defined benefit plan, assumptions used [Table Text Block]

	2020		2019
Defined benefit cost:
Discount rate - benefit obligations	3.08	%	3.73	%
Discount rate - service cost	3.10	%	3.75	%
Expected rate of salary increase1	2.75	%	2.75	%
Average longevity at retirement age for current pensioners (years)2 :
Males	21.2		21.1
Females	23.9		23.9
Defined benefit obligation:
Discount rate	2.54	%	3.08	%
Expected rate of salary increase1	2.75	%	2.75	%
Average longevity at retirement age for current pensioners (years)2 :
Males	20.3		21.2
Females	23.7		23.9
Average longevity at retirement age for current employees (future pensioners) (years)2 :
Males	22.2		23.0
Females	25.4		25.6
1 Plus merit and promotional scale based on member's age
2 CPM2014 Priv with CPM-B projection scale.

Disclosure of fair value of plan assets [Table Text Block]

December 31, 2020		Level 1		Level 2		Level 3		Total
Investments:
Money market instruments	$	4,766	$	—	$	—	$	4,766
Pooled equity funds		68,926		—		—		68,926
Pooled fixed income funds		—		98,922		—		98,922
Alternative investment funds		—		30,323		—		30,323
Balanced funds		—		549		—		549
	$	73,692	$	129,794	$	—	$	203,486

December 31, 2019		Level 1		Level 2		Level 3		Total
Investments:
Money market instruments	$	1,588	$	—	$	—	$	1,588
Pooled equity funds		76,680		—		—		76,680
Pooled fixed income funds		—		103,646		—		103,646
Alternative investment funds		—		19,438		—		19,438
Balanced funds		—		767		—		767
	$	78,268	$	123,851	$	—	$	202,119

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Other employee benefits (Tables)

12 Months Ended

Dec. 31, 2020

Other Employee Benefits [Abstract]

Disclosure of detailed information about other employee benefit plans [Table Text Block]

		Year ended
		Dec. 31, 2020			Dec. 31, 2019
Opening defined benefit obligation	$	116,696		$	93,528
Current service cost1		4,140			3,060
Past service cost		—			—
Interest cost		3,478			3,600
Effects of movements in exchange rates		2,423			4,864
Remeasurement actuarial (gains)/losses:
Arising from changes in demographic assumptions		(4,460	)		—
Arising from changes in financial assumptions		10,043			14,094
Arising from experience adjustments		(489	)		87
Benefits paid		(2,215	)		(2,537	)
Closing defined benefit obligation	$	129,616		$	116,696

¹ Includes remeasurement of other long term employee benefits

Disclosure of detailed information about other employee benefit plans, balance by member group [Table Text Block]

		Dec. 31, 2020		Dec. 31, 2019
Active members	$	68,983	$	60,801
Inactive members		60,633		55,895
Closing defined benefit obligation	$	129,616	$	116,696

Disclosure of detailed information about changes in fair value of assets of other employee benefits plan [Table Text Block]

		Dec. 31, 2020			Dec. 31, 2019
Employer contributions	$	2,215		$	2,537
Benefits paid		(2,215	)		(2,537	)
Closing fair value of assets	$	—		$	—

Disclosure of detailed information about net benefit liability for other employee benefits [Table Text Block]

		Dec. 31, 2020		Dec. 31, 2019
Unfunded benefit obligation	$	129,616	$	116,696
Vacation accrual and other - non-current		3,046		2,888
Net liability	$	132,662	$	119,584

Disclosure of detailed information about other employee benefits plan [Table Text Block]

		Dec. 31, 2020		Dec. 31, 2019
Other employee benefits liability - current (note 14)	$	3,154	$	2,806
Other employee benefits liability - non-current		129,508		116,778
Net liability	$	132,662	$	119,584

Disclosure of detailed information about employee future benefit expense [Table Text Block]

		Dec. 31, 2020		Dec. 31, 2019
Current service cost 1	$	4,140	$	3,060
Net interest cost		3,478		3,600
Components recognized in consolidated income statements	$	7,618	$	6,660

¹ Includes remeasurement of other long term employee benefit

Disclosure of detailed information about remeasurement of other long term employee benefits [Table Text Block]

		Dec. 31, 2020			Dec. 31, 2019
Remeasurement on the net defined benefit liability:
Actuarial gains arising from changes in demographic assumptions	$	(4,460	)	$	—
Actuarial losses arising from changes in financial assumptions		10,043			14,094
Actuarial (gains)/losses arising from changes experience adjustments		(489	)		87
Components recognized in statements of comprehensive income	$	5,094		$	14,181

 

Total other employee future benefit cost $ 12,712 $ 20,841

Disclosure of detailed information about other employee benefit plan, assumptions used [Table Text Block]

	Dec. 31, 2020	Dec. 31, 2019
Defined benefit cost:
Discount rate	3.17 %	3.88 %
Initial weighted average health care trend rate	5.68 %	5.74 %
Ultimate weighted average health care trend rate	4.00 %	4.00 %
Average longevity at retirement age for current pensioners (years)1 :
Males	21.2	21.1
Females	23.9	23.9

 

	Dec. 31, 2020		Dec. 31, 2019
Defined benefit obligation:
Discount rate	2.76	%	3.17	%
Initial weighted average health care trend rate	5.66	%	5.68	%
Ultimate weighted average health care trend rate	4.00	%	4.00	%
Average longevity at retirement age for current pensioners (years)1 :
Males	20.3		21.2
Females	23.7		23.9
Average longevity at retirement age for current employees (future pensioners) (years)1 :
Males	22.2		23.1
Females	25.4		25.6

¹ CPM2014 Priv with CPM-B projection scale

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Income and mining taxes (Tables)

12 Months Ended

Dec. 31, 2020

Major components of tax expense (income) [abstract]

Disclosure of detailed information about effective income tax expense recovery [Table Text Block]

		Year ended December 31,
		2020			2019
Current:
Income taxes	$	4,458		$	24,919
Mining taxes		4,671			4,720
Adjustments in respect of prior years		(398	)		6,273
		8,731			35,912
Deferred:
Income tax recoveries - origination, revaluation and/or reversal of temporary differences		(39,411	)		(133,468	)
Mining tax recoveries - origination, revaluation and/or reversal of temporary difference		(3,331	)		(12,214	)
Adjustments in respect of prior years		(494	)		817
		(43,236	)		(144,865	)
	$	(34,505	)	$	(108,953	)

Disclosure of detailed information about deferred taxes [Table Text Block]

		Dec. 31, 2020			Dec. 31, 2019
Deferred income tax asset	$	94,070		$	69,950
Deferred mining tax asset		7,829			5,096
		101,899			75,046
Deferred income tax liability		(220,568	)		(233,218	)
Deferred mining tax liability		(8,865	)		(9,710	)
		(229,433	)		(242,928	)
Net deferred tax liability balance, end of year	$	(127,534	)	$	(167,882	)

Disclosure of detailed information about changes in deferred tax assets and liabilities [Table Text Block]

		Year ended Dec. 31, 2020			Year ended Dec. 31, 2019
Net deferred tax liability balance, beginning of year	$	(167,882	)	$	(308,577	)
Deferred tax recovery		43,236			144,865
OCI transactions		(759	)		1,878
Foreign currency translation on the deferred tax liability		(2,129	)		(6,048	)
Net deferred tax liability balance, end of year	$	(127,534	)	$	(167,882	)

Disclosure of detailed information about reconciliation to statutory tax rate [Table Text Block]

		Year ended December 31,
		2020			2019
Statutory tax rate		26.3	%		27.0	%
Tax recovery at statutory rate	$	(47,047	)	$	(122,246	)
Effect of:
Deductions related to mining taxes		(1,369	)		(1,493	)
Adjusted income taxes		(48,416	)		(123,739	)
Mining tax expense (recovery)		1,291			(6,674	)
		(47,125	)		(130,413	)
Permanent differences related to:
Capital items		(160	)		3,270
Other income tax permanent differences		(1,165	)		1,747
Impact of remeasurement on decommissioning liability		7,094			(12,018	)
Temporary income tax differences not recognized		(1,827	)		(351	)
Other temporary income tax differences not recognized		2,927			2,323
Non-deductible impairment on UCM receivable		—			7,041
Withholding tax on dividends		—			6,826
Impact related to differences in tax rates in foreign operations		5,534			20,338
Impact of changes to statutory tax rates		2,412			(259	)
Foreign exchange on non-monetary items		(3,628	)		(6,633	)
Impact related to tax assessments and tax return amendments		1,433			(824	)
Tax recovery	$	(34,505	)	$	(108,953	)

Disclosure of temporary differences recognized [Table Text Block]

		Balance sheet						Income Statement
		Dec. 31, 2020			Dec. 31, 2019			Dec. 31, 2020			Dec. 31, 2019
Deferred income tax (liability) asset/expense (recovery)
Property, plant and equipment	$	(88,368	)	$	(96,841	)	$	(8,473	)	$	13,434
Pension obligation		9,467			11,332			1,294			(1,115	)
Other employee benefits		25,687			16,837			(8,850	)		(3,349	)
Decommissioning and restoration obligation		37,902			41,208			3,307			(33,391	)
Non-capital losses		110,374			90,446			(19,928	)		(17,976	)
Share issuance and debt cost		8,972			6,540			(2,768	)		4,361
Embedded derivative (prepayment option)		(13,137	)		(694	)		12,443			245
Deferred revenue		(809	)		(112	)		697			(12,839	)
Other		3,982			1,234			(4,516	)		(7,755	)
Deferred income tax asset / expense (recovery)		94,070			69,950			(26,794	)		(58,385	)
Deferred income tax liability (asset)/ (recovery) expense
Property, plant and equipment		292,858			259,145			33,713			(79,892	)
Other employee benefits		203			(80	)		(176	)		(320	)
Asset retirement obligations		(1,588	)		(833	)		(756	)		85
Non-capital losses		(78,607	)		(28,643	)		(49,965	)		(1,269	)
Other		7,702			3,629			4,073			7,302
Deferred income tax liability/ expense (recovery)		220,568			233,218			(13,111	)		(74,094	)
Deferred income tax liability/ expense (recovery)	$	(126,498	)	$	(163,268	)	$	(39,905	)	$	(132,479	)

Disclosure of detailed information about temporary differences not recognized [Table Text Block]

		Dec. 31, 2020		Dec. 31, 2019
Property, plant and equipment	$	46,718	$	33,269
Capital losses		166,227		159,545
Other employee benefits		51,226		68,866
Asset retirement obligations		193,898		146,679
Non-capital losses		115,902		122,979
Temporary differences not recognized	$	573,971	$	531,338

Disclosure of detailed information about temporary differences - deferred mining tax assets and liabilities [Table Text Block]

		Dec. 31, 2020			Dec. 31, 2019
Canada
Property, plant and equipment	$	7,829		$	5,095
		Dec. 31, 2020			Dec. 31, 2019
Peru
Property, plant and equipment	$	(8,865	)	$	(9,710	)

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Share capital (Tables)

12 Months Ended

Dec. 31, 2020

Disclosure of classes of share capital [abstract]

Disclosure of detailed information about shares, activity [Table Text Block]

	Year ended December 31, 2020			Year ended Dec. 31, 2019
	Common shares		Amount	Common shares		Amount
Beginning and end of year	261,272,151	$	1,777,340	261,272,151	$	1,777,340

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Share-based compensation (Tables)

12 Months Ended

Dec. 31, 2020

Disclosure of terms and conditions of share-based payment arrangement [line items]

Disclosure of fair value assumptions used in the Black Scholes valuation of share options [Table Text Block]

For options granted during the year ended		Dec. 31, 2020
Weighted average share price at grant date (CAD)	$	3.77
Risk-free rate		1.14%
Expected dividend yield		0.5%
Expected stock price volatility (based on historical volatility)		57.0%
Expected life of option (months)		84
Weighted average per share fair value of stock options granted (CAD)	$	2.02

Disclosure of range of exercise prices of outstanding share options [Table Text Block]

Dec. 31, 2020
Range of exercise prices C$	Number of options outstanding	Weighted average remaining contractual life (years)	Weighted average exercise price C$		Number of options exercisable	Weighted average share price at exercise date C$
$3.76 - $3.92	1,563,189	6.16	$	3.77	—	$	—

Disclosure of number and weighted average exercise prices of share options [Table Text Block]

	Year ended				Year ended
	Dec. 31, 2020				Dec. 31, 2019
	Number of shares subject to option			Weighted- average exercise price C$	Number of shares subject to option		Weighted average exercise price C$
Balance, beginning of year	—			—	—	$	—
Number of units granted during the year	1,581,385		$	3.77	—	$	—
Forfeited	(18,196	)	$	3.76	—	$	—
Balance, end of year	1,563,189		$	3.77	—	$	—

Deferred Share Unit [Member]

Disclosure of terms and conditions of share-based payment arrangement [line items]

Disclosure of detailed information about number and weighted average exercise prices of other equity instruments [Table Text Block]

		Year ended
		Dec. 31, 2020		Dec. 31, 2019
Granted during the year:
Number of units		465,889		337,999
Weighted average price (C$/unit)	$	4.10	$	5.89
Expenses recognized during the year1 (notes 6c)	$	5,149	$	1,157
Payments made during the year (note 19)	$	497	$	1,668

¹ This expense relates to the grant of DSUs, as well as mark-to-market adjustments, and is presented within selling and administrative expenses on the consolidated income statements.

Restricted Share Unit [Member]

Disclosure of terms and conditions of share-based payment arrangement [line items]

Disclosure of detailed information about number and weighted average exercise prices of other equity instruments [Table Text Block]

		Year ended
		Dec. 31, 2020			Dec. 31, 2019
Number of units, beginning of year 1		2,223,999			3,666,867
Number of units granted during the year		1,388,786			1,080,741
Credits for dividends		17,587			7,554
Number of units forfeited during the year		(44,678	)		(573,914	)
Number of units vested		(645,357	)		(1,957,249	)
Number of units, end of year1		2,940,337			2,223,999
Weighted average price - granted (C$/unit)	$	3.98		$	8.98
Expenses recognized during the year2 (note 6c)	$	6,750		$	1,557
Payments made during the year (note 19)	$	2,646		$	9,380

Performance Share Unit [Member]

Disclosure of terms and conditions of share-based payment arrangement [line items]

Disclosure of detailed information about number and weighted average exercise prices of other equity instruments [Table Text Block]

		Year ended
		Dec. 31, 2020		Dec. 31, 2019
Number of units, beginning of year		—		—
Number of units granted during the year		1,089,569		—
Credits for dividends		6,046		—
Number of units, end of year		1,095,615		—
Weighted average price - granted (C$/unit)	$	3.97	$	—
Expenses recognized during the year (note 6c)	$	1,987	$	—
Payments made during the year (note 19)	$	—	$	—

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Earnings per share (Tables)

12 Months Ended

Dec. 31, 2020

Basic earnings per share [abstract]

Disclosure of earnings per share [Table Text Block]

	Year ended
	Dec. 31, 2020	Dec. 31, 2019
Basic and diluted weighted average common shares outstanding	261,272,151	261,272,151

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Financial instruments (Tables)

12 Months Ended

Dec. 31, 2020

Disclosure of detailed information about financial instruments [abstract]

Disclosure of fair value measurement [Table Text Block]

		Dec. 31, 2020						Dec. 31, 2019
		FV			CV			FV			CV
Financial assets at amortized cost
Cash and cash equivalents 1	$	439,135		$	439,135		$	396,146		$	396,146
Restricted cash1		337			337			337			337
Fair value through profit or loss
Trade and other receivables 1, 2, 3		114,381			114,381			91,046			91,046
Non-hedge derivative assets 4		2,736			2,736			1,712			1,712
Investments 5		15,669			15,669			11,287			11,287
Total financial assets		572,258			572,258			500,528			500,528
Financial liabilities at amortized cost
Trade and other payables1, 2		209,413			209,413			184,604			184,604
Deferred Rosemont acquisition consideration 8		25,961			25,961			24,491			24,491
Other financial liabilities 6		41,912			40,787			21,338			24,000
Senior unsecured notes 7		1,277,124			1,139,695			1,050,126			991,558
Fair value through profit or loss
Embedded derivatives 4		—			—			9,074			9,074
Gold prepayment liability 9		137,031			137,031			—			—
Non-hedge derivative liabilities 4		15,312			15,312			10,295			10,295
Total financial liabilities		1,706,753			1,568,199			1,299,928			1,244,022
Net financial liability	$	(1,134,495	)	$	(995,941	)	$	(799,400	)	$	(743,494	)
1 Cash and cash equivalents, restricted cash, trade and other receivables and trade and other payables are recorded at carrying value, which approximates fair value due to their short-term nature and generally negligible credit losses.
2 Excludes tax and other statutory amounts.
3 Trade and other receivables contain receivables including provisionally priced receivables classified as FVLTPL and various other items at amortized cost. The fair value of provisionally priced receivables is determined using forward metals prices which is a level 2 valuation method.
4 Derivatives are carried at their fair value, which is determined based on internal valuation models that reflect observable forward market commodity prices, currency exchange rates, and discount factors based on market US dollar interest rates adjusted for credit risk.
5 All investments are carried at their fair value, which is determined using quoted market bid prices in active markets for listed shares.
6 These financial liabilities relate to agreements with communities near the Constancia project in Peru (note 15). Fair values have been determined using a discounted cash flow analysis based on expected cash flows and a credit adjusted discount rate.
7 Fair value of the senior unsecured notes (note 17) has been determined using the quoted market price at the period end. Fair value incorporates the fair value of the prepayment option embedded derivative. The carrying value of this embedded derivative is at FVTPL (2020: $49,754; 2019: $2,585) and has been determined using a binomial tree/lattice approach based on the Hull-White single factor interest rate term structure model.
8 Discounted value based on a risk adjusted discount rate.
9 The gold prepayment liability (note 15) is designated as fair value through profit or loss under the fair value option. Gains and losses related to the Company's own credit risk have been recorded at fair value through other comprehensive income. The fair value adjustment recorded in other comprehensive income for the year ended December 31, 2020 was a loss of $1,885.

Disclosure of detailed information about significant unobservable inputs used in fair value measurement of assets and liabilities [Table Text Block]

December 31, 2020		Level 1		Level 2		Level 3		Total
Financial assets measured at fair value
Financial assets at FVTPL:
Non-hedge derivatives	$	—	$	2,736	$	—	$	2,736
Investments		15,669		—		—		15,669
	$	15,669	$	2,736	$	—	$	18,405
Financial liabilities measured at fair value
Financial liabilities at FVTPL:
Non-hedge derivatives	$	—	$	15,312	$	—	$	15,312
Gold prepayment liability1		—		137,031		—		137,031
Financial liabilities at amortized cost:
Other financial liabilities		—		—		41,912		41,912
Senior unsecured notes		1,277,124		—		—		1,277,124
	$	1,277,124	$	152,343	$	41,912	$	1,471,379
1The gold prepayment liability (note 15) is designated as fair value through profit or loss under the fair value option.  Gains and losses related to the Company's own credit risk have been recorded at fair value through other comprehensive income. The fair value adjustment recorded in other comprehensive income for the year ended December 31, 2020 was a loss of $1,885.

 

December 31, 2019		Level 1		Level 2		Level 3		Total
Financial assets measured at fair value
Financial assets at FVTPL:
Non-hedge derivatives	$	—	$	1,712	$	—	$	1,712
Investments		11,287		—		—		11,287
	$	11,287	$	1,712	$	—	$	12,999
Financial liabilities measured at fair value
Financial liabilities at FVTPL:
Embedded derivatives	$	—	$	9,074	$	—	$	9,074
Non-hedge derivatives		—		10,295		—		10,295
Financial liabilities at amortized cost:
Other financial liabilities		—		—		21,338		21,338
Senior unsecured notes		1,050,126		—		—		1,050,126
	$	1,050,126	$	19,369	$	21,338	$	1,090,833

Disclosure of detailed information about net position of contracts awaiting final pricing [Table Text Block]

Metal in concentrate		Sales awaiting final pricing		Average YTD price ($/unit)
	Unit	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Copper	pounds (in thousands)	47,901	72,977	3.52	2.80
Gold	oz	18,106	16,152	1,894	1,522
Silver	oz	123,380	124,371	26.35	17.86

Disclosure of detailed information about foreign currency risk [Table Text Block]

		Dec. 31, 2020									Dec. 31, 2019
		CAD1			USD2			PEN3			CAD1			USD2			PEN3
Cash and cash equivalent	$	7,791		$	3,895		$	4,141		$	8,394		$	21,217		$	7,617
Trade and other receivables		31			43,316			36,951			374			56,998			25,413
Other financial assets		15,669			—			—			11,287			—			—
Trade and other payables		(6,104	)		(1,419	)		(34,622	)		(5,719	)		(435	)		(22,618	)
Other financial liabilities		—			—			(40,787	)		—			—			(24,000	)
	$	17,387		$	45,792		$	(34,317	)	$	14,336		$	77,780		$	(13,588	)
1 HMI is exposed to foreign currency risk on CAD.
2 The Manitoba segment is exposed to foreign currency risk on USD.
3 The Peru segment is exposed to foreign currency risk on PEN.

Disclosure of detailed information about sensitivity analysis for foreign currency risk [Table Text Block]

December 31, 2020	Change of:	Would have changed 2020 after-tax profit by:
USD/CAD exchange rate1	+ 10%	$	1.1		million
USD/CAD exchange rate1	- 10%	(1.4		)	million
USD/PEN exchange rate2	+ 10%	2.0			million
USD/PEN exchange rate2	- 10%	(2.5		)	million
December 31, 2019	Change of:	Would have changed 2019 after-tax profit by:
USD/CAD exchange rate1	+ 10%	$	3.4		million
USD/CAD exchange rate1	- 10%	(4.1		)	million
USD/PEN exchange rate2	+ 10%	0.8			million
USD/PEN exchange rate2	- 10%	(1.0		)	million

Disclosure of detailed information about commodity price risk [Table Text Block]

December 31, 2020		Change of:		Would have changed  2020 after-tax profit by:
Copper prices ($/lb)3		+	$0.30		$	(1.4)	million
Copper prices ($/lb)3		—	$0.30		1.4		million
Zinc prices ($/lb)4		+	$0.10		0.3		million
Zinc prices ($/lb)4		—	$0.10		(0.3)		million
December 31, 2019		Change of:		Would have changed 2019 after-tax profit by:
Copper prices ($/lb)3		+	$0.30		(2.0)		million
Copper prices ($/lb)3		—	$0.30		2.0		million
Zinc prices ($/lb)4		+	$0.10		1.0		million
Zinc prices ($/lb)4		—	$0.10		(1.0)		million
	3 Effect on profit due to provisional pricing derivatives (note 27c) and copper fixed for floating swaps (note 27b).
	4 Effect on profit due to provisional pricing derivatives (note 27c) and non-hedge zinc derivatives (note 27b).

Disclosure of detailed information about share price risk [Table Text Block]

December 31, 2020	Change of:		Would have changed 2020 after-tax profit by:
Share prices	+	25%		$	3.9	million
Share prices	—	25%		(3.9)		million
December 31, 2019	Change of:		Would have changed 2019 after-tax profit by:
Share prices	+	25%		$	2.8	million
Share prices	—	25%		(2.8)		million

Disclosure of detailed information about interest rate risk [Table Text Block]

December 31, 2020	Change of:		Would have changed 2020 after-tax profit by:
Interest rates	+	2.00%		$	(38.0)	million
Interest rates	—	2.00%		48.5		million
December 31, 2019	Change of:		Would have changed 2019 after-tax profit by:
Interest rates	+	2.00%		$	2.3	million
Interest rates	—	2.00%		(2.6)		million

(ii) Credit risk

Disclosure of detailed information about liquidity risk [Table Text Block]

Dec. 31, 2020	Carrying amount			Contractual cash flows			12 months or less			13 - 36 months			37 - 60 months			More than 60 months
Assets used to manage liquidity risk
Cash and cash equivalents	$	439,135		$	439,135		$	439,135			—		$	—		$	—
Restricted cash		337			337			337			—			—			—
Trade and other receivables		114,381			114,381			114,381			—			—			—
Non-hedge derivative assets		2,736			2,736			2,736			—			—			—
	$	556,589		$	556,589		$	556,589		$	—		$	—		$	—
Non-derivative financial liabilities
Trade and other payables, including embedded derivatives	$	(209,413	)	$	(209,413	)	$	(209,413	)	$	—		$	—		$	—
Other financial liabilities 1		(40,787	)		(58,837	)		(12,097	)		(9,483	)		(6,578	)		(30,679	)
Deferred Rosemont acquisition consideration		(25,961	)		(30,000	)		—			(20,000	)		(10,000	)		—
Long-term debt, including embedded derivatives		(1,139,695	)		(1,726,904	)		(87,966	)		(168,188	)		(742,125	)		(728,625	)
Gold prepayment obligation		(137,031	)		(137,031	)		—			(137,031	)		—			—
	$	(1,552,887	)	$	(2,162,185	)	$	(309,476	)	$	(334,702	)	$	(758,703	)	$	(759,304	)
Derivative financial liabilities
Non hedge derivative contracts	$	(15,312	)	$	(15,312	)	$	(15,312	)	$	—		$	—		$	—
	$	(15,312	)	$	(15,312	)	$	(15,312	)	$	—		$	—		$	—
1 Represents the Peru community agreement obligation, excluding interest.

Dec. 31, 2019		Carrying amount			Contractual cash flows			12 months or less			13 - 36 months			37 - 60 months			More than 60 months
Assets used to manage liquidity risk
Cash and cash equivalents	$	396,146		$	396,146		$	396,146		$	—		$	—		$	—
Restricted cash		337			337			337
Trade and other receivables		91,046			91,046			89,451			—			—			1,595
Non-hedge derivative assets		1,712			1,712			1,712			—			—			—
	$	489,241		$	489,241		$	487,646		$	—		$	—		$	1,595
Non-derivative financial liabilities
Trade and other payables, including embedded derivatives	$	(184,604	)	$	(184,604	)	$	(184,604	)	$	—		$	—		$	—
Other financial liabilities 1		(24,000	)		(33,723	)		(6,672	)		(4,811	)		(4,734	)		(17,506	)
Deferred Rosemont acquisition consideration		(24,491	)		(30,000	)		—			(10,000	)		(20,000	)		—
Long-term debt, including embedded derivatives		(991,558	)		(1,350,540	)		(72,165	)		(149,500	)		(1,128,875	)		—
	$	(1,224,653	)	$	(1,598,867	)	$	(263,441	)	$	(164,311	)	$	(1,153,609	)	$	(17,506	)
Derivative financial liabilities
Embedded derivative	$	(9,074	)	$	(9,074	)	$	(9,074	)	$	—		$	—		$	—
Non-hedge derivative contracts		(10,295	)		(10,295	)		(10,295	)		—			—			—
	$	(19,369	)	$	(19,369	)	$	(19,369	)	$	—		$	—		$	—
1 Represents the Peru community agreement obligation, excluding interest.

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Commitments and contingencies (Tables)

12 Months Ended

Dec. 31, 2020

Notes to Financial Statements [Abstract]

Disclosure of maturity analysis of operating lease payments [Table Text Block]

		2020		2019
Within one year	$	58,173	$	57,860
After one year but not more than five years		2,192		26,395
More than five years		—		—
	$	60,365	$	84,255

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Related parties (Tables)

12 Months Ended

Dec. 31, 2020

Disclosure of transactions between related parties [abstract]

Disclosure of subsidiaries [Table Text Block]

				Beneficial ownership of ultimate controlling party (Hudbay Minerals Inc.)
Name	Jurisdiction	Business	Entity's Parent	2020	2019
HudBay Marketing & Sales Inc.	Canada	Marketing and sales	HMI	100%	100%
HudBay Peru Inc.	British Columbia	Holding company	HMI	100%	100%
HudBay Peru S.A.C.	Peru	Exploration/development	Peru Inc.	100%	100%
HudBay (BVI) Inc.	British Virgin Islands	Precious metals sales	Peru Inc.	100%	100%
Hudbay Arizona Inc.	British Columbia	Holding company	HMI	100%	100%
Rosemont Copper Company	Arizona	Exploration/development	HudBay Arizona (US) Holding Corporation	100%	100%

Disclosure of information about key management personnel [Table Text Block]

		2020		2019
Short-term employee benefits1	$	7,951	$	8,319
Post-employment benefits		639		762
Long-term share-based awards		6,381		6,966
	$	14,971	$	16,047

¹ Such as salaries and social security contributions, paid annual leave and paid sick leave, profit-sharing and bonuses and nonmonetary benefits (such as medical care, housing, cars and free or subsidized goods or services) for current employees.

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Supplementary cash flow information (Tables)

12 Months Ended

Dec. 31, 2020

Supplementary Cash Flow Information [Abstract]

Disclosure of detailed information about supplemental cash flow information [Table Text Block]

		Year ended December 31,
		2020			2019
Change in:
Trade and other receivables	$	(37,720	)	$	3,252
Other financial assets/liabilities		4,077			12,540
Inventories		(2,867	)		(11,759	)
Prepaid expenses		(3,722	)		(3,484	)
Trade and other payables		36,247			5,613
Provisions and other liabilities		1,602			(2,590	)
	$	(2,383	)	$	3,572

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Segmented information (Tables)

12 Months Ended

Dec. 31, 2020

Disclosure of operating segments [abstract]

Disclosure of segments [Table Text Block]

Year ended December 31, 2020
		Manitoba		Peru			Arizona			Corporate and other activities			Total
Revenue from external customers	$	615,699	$	476,719		$	—		$	—		$	1,092,418
Cost of sales
Mine operating costs		391,504		300,087			—			—			691,591
Depreciation and amortization		177,552		184,275			—			—			361,827
Gross profit (loss)		46,643		(7,643	)		—			—			39,000
Selling and administrative expenses		—		—			—			41,408			41,408
Exploration and evaluation expenses		6,491		6,295			3,870			540			17,196
Other expenses		8,382		4,901			2,066			2,234			17,583
Results from operating activities	$	31,770	$	(18,839	)	$	(5,936	)	$	(44,182	)	$	(37,187	)
Net interest expense on long term debt													82,712
Accretion on streaming arrangements													56,670
Change in fair value of financial instruments													(29,370	)
Other net finance costs													31,890
Loss before tax													(179,089	)
Tax recovery													(34,505	)
Loss for the year												$	(144,584	)

 

 

Year ended December 31, 2019
		Manitoba			Peru		Arizona			Corporate and other activities			Total
Revenue from external customers	$	537,421		$	700,018	$	—		$	—		$	1,237,439
Cost of sales
Mine operating costs		385,159			356,183		—			—			741,342
Depreciation and amortization		135,429			209,126		—			—			344,555
Gross profit		16,833			134,709		—			—			151,542
Selling and administrative expenses		—			—		—			36,170			36,170
Exploration and evaluation expenses		18,476			5,804		—			6,494			30,774
Other expenses		8,201			14,022		28,149			744			51,116
Impairment loss		—			—		322,249			—			322,249
Results from operating activities	$	(9,844	)	$	114,883	$	(350,398	)	$	(43,408	)	$	(288,767	)
Net interest expense on long term debt													68,375
Accretion on streaming arrangements													69,772
Change in fair value of financial instruments													8,247
Other net finance costs													17,602
Loss before tax													(452,763	)
Tax recovery													(108,953	)
Loss for the year												$	(343,810	)

Disclosure of segments, assets and liabilities [Table Text Block]

December 31, 2020
		Manitoba		Peru		Arizona		Corporate and other activities		Total
Total assets	$	801,691	$	2,535,939	$	718,982	$	610,033	$	4,666,645
Total liabilities		562,013		973,756		76,926		1,354,144		2,966,839
Property, plant and equipment1		699,884		2,290,097		709,939		31,735		3,731,655
1Included in Corporate and Other activities is $27.5 million of property, plant and equipment that is located in Nevada.

December 31, 2019
		Manitoba		Peru		Arizona		Corporate and other activities		Total
Total assets	$	779,896	$	2,556,895	$	700,799	$	423,467	$	4,461,057
Total liabilities		556,267		926,642		78,988		1,051,037		2,612,934
Property, plant and equipment1		684,679		2,253,404		691,538		32,938		3,662,559

¹Included in Corporate and Other activities is $27.3 million of property, plant and equipment that is located in Nevada

Disclosure of segments, additions to property, plant and equipment [Table Text Block]

December 31, 2020
		Manitoba		Peru		Arizona		Corporate and other activities		Total
Additions to property, plant and equipment	$	159,313	$	208,805	$	18,640	$	32	$	386,790

December 31, 2019
		Manitoba		Peru		Arizona		Corporate and other activities		Total
Additions to property, plant and equipment	$	143,418	$	101,717	$	38,923	$	905	$	284,963

Disclosure of geographical areas, revenue by customer location [Table Text Block]

		2020		2019
Revenue by customer location 1
Canada	$	422,403	$	418,636
China		215,278		158,795
United States		206,906		209,382
Philippines		77,575		71,506
Peru		56,437		110,411
Switzerland		55,703		162,167
Singapore		29,314		71,506
Germany		11,725		10,731
Other		17,077		24,305
	$	1,092,418	$	1,237,439

¹ Presented based on the ultimate destination of the product if known. If the eventual destination of the product sold through traders is not known then revenue is allocated to the location of the customer's business office and not the ultimate destination of the product.

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Basis of preparation (Narrative) (Details)	Apr. 25, 2019
United Copper And Moly L L C [Member] | Rosemont Project [Member]
Basis Of Presentation [Line Items]
Percentage of voting equity interests acquired	7.95%

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Acquisition of remaining interest in the Rosemont project (Narrative) (Details) - Rosemont Project [Member] - Agreement with United Copper & Moly LLC ("UCM") [Member] $ in Thousands	1 Months Ended
	Apr. 25, 2019 USD ($)
Disclosure of detailed information about business combination [line items]
Percentage of voting equity interests acquired	7.95%
Upfront cash consideration paid	$ 45,000
Commitment to pay three annual installments of per year, commencing July 1, 2022	10,000
Loan receivable balance written off	$ 25,978
Percentage of ownership interest held	100.00%

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Revenue and expenses (Narrative) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($) Share	Dec. 31, 2019 USD ($) Share
Revenue And Expenses [Line Items]
Variable consideration adjustment	$ 6,668	$ (16,295)
Stock options granted | Share	1,581,385	0
Impairment loss recognised in profit or loss, property, plant and equipment		$ 322,249
Employee share purchase plan, matching contribution, percentage	75.00%	75.00%
Bottom of range [member]
Revenue And Expenses [Line Items]
Employee share purchase plan, contributions, percentage of pre-tax base salary	1.00%	1.00%
Top of range [member]
Revenue And Expenses [Line Items]
Employee share purchase plan, contributions, percentage of pre-tax base salary	10.00%	10.00%
Manitoba [Member]
Revenue And Expenses [Line Items]
Profit sharing plan, percentage	10.00%	10.00%
Peru [Member]
Revenue And Expenses [Line Items]
Profit sharing plan, percentage	8.00%	8.00%

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Inventories (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure Of Inventories [Abstract]
Cost of inventories recognised as expense during period	$ 921,895	$ 978,810
Inventory write-down	$ 32	$ 504

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Intangibles and other assets (Narrative) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Disclosure of detailed information about intangible assets [abstract]
Intangibles and other assets	$ 21,173	$ 10,411
Other assets	15,764	5,384
Intangible assets other than goodwill	$ 5,409	$ 5,027

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Property, plant and equipment (Narrative) (Details) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2019 USD ($) $ / lbs	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Disclosure of detailed information about property, plant and equipment [line items]
Impairment loss		$ 0	$ 322,249
Cash generating units [Member] | Arizona [Member]
Disclosure of detailed information about property, plant and equipment [line items]
Impairment loss			$ 322,249
Discount rate applied to cash flow projections	9.50%
Cash flow calculations utilized long-term copper price | $ / lbs	3.10
Cash flow calculations utilized molybdenum long-term prices | $ / lbs	11.00
Recoverable amount of asset or cash-generating unit	$ 615,368
Amount by which unit's recoverable amount exceeds its carrying amount	$ 242,106

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Other financial liabilities (Narrative) (Details) $ in Thousands		12 Months Ended
	May 07, 2020 USD ($) Ounce $ / OZ	Dec. 31, 2020 USD ($)
Disclosure of financial liabilities [abstract]
Proceeds from gold prepayment	$ 115,005	$ 115,005
Gold ounces sold | Ounce	79,954
Gold forward curve average price per ounce | $ / OZ	1,682
Gains (losses) on financial liabilities at fair value through profit or loss		$ (22,026)

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Lease Liability (Narrative) (Details) - Finance lease obligations [Member]	Dec. 31, 2020
Bottom of range [member]
Disclosure of quantitative information about right-of-use assets [line items]
Borrowings, interest rate	1.95%
Top of range [member]
Disclosure of quantitative information about right-of-use assets [line items]
Borrowings, interest rate	5.44%

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Long-term debt (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Sep. 23, 2020	Aug. 31, 2020
Disclosure of detailed information about borrowings [line items]
Write-down of unamortized transaction costs	$ 3,817	$ 0
Premium paid on redemption of notes	7,252
Repayments of borrowings	400,000
Senior secured revolving credit facilities [Member]
Disclosure of detailed information about borrowings [line items]
Face amount of debt instruments	400,000			$ 550,000
Senior secured revolving credit facilities [Member] | Peru [Member]
Disclosure of detailed information about borrowings [line items]
Letters of credit issued to support reclamation or pension obligations	24,796
Surety bonds issued to support reclamation obligations	20,000
Letters of credit	45,000
Senior secured revolving credit facilities [Member] | Manitoba [Member]
Disclosure of detailed information about borrowings [line items]
Surety bonds issued to support reclamation obligations	90,295
Senior secured revolving credit facilities [Member] | Arizona [Member]
Disclosure of detailed information about borrowings [line items]
Surety bonds issued to support reclamation obligations	8,591
Senior unsecured notes [Member]
Disclosure of detailed information about borrowings [line items]
Face amount of debt instruments	1,200,000
Write-down of unamortized transaction costs	2,315
Repayments of borrowings	$ 400,000
Senior Notes Due 2023 [Member]
Disclosure of detailed information about borrowings [line items]
Borrowings, interest rate	7.25%
Repayments of borrowings	$ 400,000
Senior Notes Due 2025 [Member]
Disclosure of detailed information about borrowings [line items]
Face amount of debt instruments	$ 600,000
Borrowings, interest rate	7.625%
Senior Notes Due 2029 [Member]
Disclosure of detailed information about borrowings [line items]
Face amount of debt instruments	$ 600,000		$ 600,000
Borrowings, interest rate	6.125%		6.125%
Unamortized transaction costs - revolving credit facilities [Member]
Disclosure of detailed information about borrowings [line items]
Write-down of unamortized transaction costs	$ 1,502

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Deferred revenue (Narrative) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($) $ / OZ	Dec. 31, 2019 USD ($) $ / OZ	Nov. 04, 2013 USD ($)	Aug. 08, 2012 USD ($)
Disclosure of disaggregation of revenue from contracts with customers [line items]
Deposits from customers			$ 885,000
Description of additional deposit payments	In addition to the aggregate deposit payments of $885,000, as gold and silver is delivered under the stream agreements, Hudbay receives cash payments equal to the lesser of (i) the market price and (ii) $400 per ounce (for gold) and $5.90 per ounce (for silver), subject to 1% annual escalation after three years, from the inception of the agreement.
Amortization of deferred revenue - variable consideration adjustments - prior periods	$ 6,668	$ (16,295)
Accretion on streaming arrangements - variable consideration adjustments - prior periods	$ 3,692	$ (6,047)
Stream transactions with 777 mine [Member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Deposits from customers				$ 455,100
Drawdown rate for gold | $ / OZ	1,173	1,177
Drawdown rate for silver | $ / OZ	22.43	22.51
Stream transactions with Constancia mine [Member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Deposits from customers			$ 429,900
Drawdown rate for gold | $ / OZ	976	948
Drawdown rate for silver | $ / OZ	21.52	21.77

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Provisions (Narrative) (Details)	Dec. 31, 2020	Dec. 31, 2019
Bottom of range [member]
Disclosure of other provisions [line items]
Provision estimates, discount rate used	0.12%	1.59%
Top of range [member]
Disclosure of other provisions [line items]
Provision estimates, discount rate used	1.65%	2.39%

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Pension obligations (Narrative) (Details) - Pension obligations [Member] $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($) Year	Dec. 31, 2019
Statements [Line Items]
Estimate of contributions expected to be paid to plan for next annual reporting period	$ 12,437
Weighted average duration of defined benefit obligation	21 years 2 months 12 days	19 years 3 months 18 days
Return on plan assets, percentage	10.80%	15.10%
Actuarial assumption of discount rates [Member]
Statements [Line Items]
Reasonably possible increase in actuarial assumption, basis points	50
Increase (decrease) in defined benefit obligation due to reasonably possible increase in actuarial assumption	$ (22,846)
Reasonably possible decrease in actuarial assumption, basis points	50
Increase (decrease) in defined benefit obligation due to reasonably possible decrease in actuarial assumption	$ 26,250
Actuarial assumption of expected rates of salary increases [Member]
Statements [Line Items]
Percentage of reasonably possible increase in actuarial assumption	1.00%
Increase (decrease) in defined benefit obligation due to reasonably possible increase in actuarial assumption	$ 3,526
Percentage of reasonably possible decrease in actuarial assumption	1.00%
Increase (decrease) in defined benefit obligation due to reasonably possible decrease in actuarial assumption	$ (3,158)
Actuarial assumptions of life expectancy [Member]
Statements [Line Items]
Reasonably possible increase in life expectancy (years) | Year	1
Increase (decrease) in defined benefit obligation due to reasonably possible increase in actuarial assumption	$ 2,978
Reasonably possible decrease in life expectancy (years) | Year	1
Increase (decrease) in defined benefit obligation due to reasonably possible decrease in actuarial assumption	$ (3,039)
Active members [Member]
Statements [Line Items]
Weighted average duration of defined benefit obligation	22 years 3 months 18 days	19 years 8 months 12 days
Deferred members [Member]
Statements [Line Items]
Weighted average duration of defined benefit obligation	21 years 10 months 24 days	22 years
Retired members [Member]
Statements [Line Items]
Weighted average duration of defined benefit obligation	12 years	10 years 6 months

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Other employee benefits (Narrative) (Details) - Other employee benefits [Member] $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($) Year	Dec. 31, 2019 Year
Other Employee Benefits [Line Items]
Weighted average duration of non-pension post employment obligation | Year	19.4	19.6
Actuarial assumption of discount rates [Member]
Other Employee Benefits [Line Items]
Reasonably possible increase in actuarial assumption, basis points	50
Increase (decrease) in defined benefit obligation due to reasonably possible increase in actuarial assumption	$ (11,585)
Reasonably possible decrease in actuarial assumption, basis points	50
Increase (decrease) in defined benefit obligation due to reasonably possible decrease in actuarial assumption	$ 13,392
Actuarial assumption of health care cost trend rates [Member]
Other Employee Benefits [Line Items]
Percentage of reasonably possible increase in actuarial assumption	1.00%
Increase (decrease) in defined benefit obligation due to reasonably possible increase in actuarial assumption	$ 27,392
Percentage of reasonably possible decrease in actuarial assumption	1.00%
Increase (decrease) in defined benefit obligation due to reasonably possible decrease in actuarial assumption	$ (21,023)
Actuarial assumptions of life expectancy [Member]
Other Employee Benefits [Line Items]
Reasonably possible increase in life expectancy (years) | Year	1
Increase (decrease) in defined benefit obligation due to reasonably possible increase in actuarial assumption	$ 5,553
Reasonably possible decrease in life expectancy (years) | Year	1
Increase (decrease) in defined benefit obligation due to reasonably possible decrease in actuarial assumption	$ (5,645)
Active members [Member]
Other Employee Benefits [Line Items]
Weighted average duration of non-pension post employment obligation | Year	24.6	24.9
Inactive members [Member]
Other Employee Benefits [Line Items]
Weighted average duration of non-pension post employment obligation | Year	13.6	13.9

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Income and mining taxes (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deductible temporary differences for which no deferred tax asset is recognised	$ 573,971	$ 531,338
Description of expiry date of deductible temporary differences, unused tax losses and unused tax credits	The Canadian non-capital losses were incurred between 2006 and 2020 and expire between 2026 and 2040. Hudbay incurred United States net operating losses between 2004 and 2020 which have a twenty year carry forward period. Peruvian net operating losses were incurred in 2020 which have a four year carry forward period.
Mining tax effect of temporary differences recognized [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	$ 7,544	$ 5,361

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Share capital (Narrative) (Details) $ / shares in Units, $ in Thousands, $ in Thousands	1 Months Ended					12 Months Ended
	Feb. 18, 2021 $ / shares	Sep. 25, 2020 USD ($)	Mar. 27, 2020 USD ($)	Sep. 27, 2019 USD ($)	Mar. 29, 2019 USD ($)	Dec. 31, 2020 $ / shares	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Mar. 26, 2021 CAD ($)
Disclosure of classes of share capital [line items]
Dividends declared, amount per share | $ / shares						$ 0.01
Dividends paid | $		$ 1,979	$ 1,804	$ 1,972	$ 1,955		$ 3,783	$ 3,927
Dividends declared after reporting period [Member]
Disclosure of classes of share capital [line items]
Dividends declared, amount per share | $ / shares	$ 0.01
Dividends declared | $									$ 2,613

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Share-based compensation (Narrative) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($) Share shares	Dec. 31, 2019 USD ($) Share shares	Dec. 31, 2018 Share
Disclosure of terms and conditions of share-based payment arrangement [line items]
Stock options granted | Share	1,581,385	0
Stock options forfeited | Share	18,196	0
Number of options outstanding | Share	1,563,189	0	0
Deferred Share Unit [Member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Liability related to share unit plans | $	$ 8,719	$ 3,876
Restricted Share Unit [Member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Liability related to share unit plans | $	$ 10,449	$ 5,477
Restricted share units vested, but unreleased and unpaid | shares	738,002	616,397
Performance Share Unit [Member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Liability related to share unit plans | $	$ 2,030	$ 0
Stock option plan [Member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Description of stock option plan, number of options authorized	The Company's stock option plan was approved in June 2005 and amended in May 2008 (the "Plan"). Under the amended Plan, the Company may grant to employees, officers, directors or consultants of the Company or its affiliates options to purchase up to a maximum of 13 million common shares of Hudbay. The Company has determined that the appropriate accounting treatment is to classify the stock options as equity settled transactions.
Maximum number of common shares purchaseable under stock option plan | shares	13,000,000

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Earnings per share (Narrative) (Details) - shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Basic earnings per share [abstract]
Weighted average stock options with potential future dilutive effect not included in calculation of diluted earnings per share	1,292,840
Diluted weighted average common shares outstanding	261,272,151	261,272,151

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Capital management (Narrative) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statements [Line Items]
Long-term debt	$ 1,135,675	$ 985,255
Cash and cash equivalents	$ 439,135	$ 396,146	$ 515,497

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Financial instruments (Narrative) (Details) $ in Thousands, lb in Millions	12 Months Ended
	Dec. 31, 2020 USD ($) lb $ / lbs	Dec. 31, 2019 USD ($) lb $ / lbs
Disclosure of detailed information about financial instruments [line items]
Prepayment option - embedded derivative	$ 49,754	$ 2,585
Gold prepayment revaluation	$ (1,885)	$ 0
Pounds of copper fixed for floating swaps | lb	43.4	66.1
Average price recorded for copper fixed for floating swaps | $ / lbs	3.22	2.67
Pounds of zinc forward sales contracts | lb	3.5	12.7
Derivative financial assets	$ 2,736	$ 1,712
Derivative financial liabilities	15,312	10,295
Aggregate fair value of other embedded derivatives		9,074
Precious metal credits delivered to settle liability	10,856
Gold prepayment liability	$ 137,031	$ 0
Deposits and other investments with Schedule 1 Canadian banks, as a percentage of total cash and cash equivalents	90.00%	92.00%
Percentage of entity's trade receivables that are insured	95.00%	96.00%
Credit insurance deductible	10.00%
Percentage of receivables that represent largest customers	56.00%	63.00%
Copper fixed for floating swaps [Member]
Disclosure of detailed information about financial instruments [line items]
Derivative financial liabilities	$ 13,198	$ 8,362
Non-hedge derivative zinc contracts [Member]
Disclosure of detailed information about financial instruments [line items]
Derivative financial assets	$ 622
Derivative financial liabilities		$ 221
Non-hedge derivative zinc contracts [Member] | Bottom of range [member]
Disclosure of detailed information about financial instruments [line items]
Range of zinc forward sales contracts prices | $ / lbs	0.87	1.00
Non-hedge derivative zinc contracts [Member] | Top of range [member]
Disclosure of detailed information about financial instruments [line items]
Range of zinc forward sales contracts prices | $ / lbs	1.30	1.15
Provisional pricing - copper and zinc [Member]
Disclosure of detailed information about financial instruments [line items]
Derivative financial assets	$ 21,295	$ 10,165

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Commitments and contingencies (Narrative) (Details) $ in Thousands	Dec. 31, 2020 USD ($)
Canada [Member]
Statements [Line Items]
Capital commitments	$ 22,539
Canada [Member] | Amounts which can be terminated [Member]
Statements [Line Items]
Capital commitments	19,014
Peru [Member] | Amounts which can be terminated [Member]
Statements [Line Items]
Capital commitments	39,078
Rosemont project in Arizona [Member]
Statements [Line Items]
Capital commitments	179,656
Rosemont project in Arizona [Member] | Amounts which can be terminated [Member]
Statements [Line Items]
Capital commitments	$ 89,312

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Supplementary cash flow information (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Apr. 25, 2019
Supplementary Cash Flow Information [Line Items]
Increase to property, plant and equipment assets due to remeasurements of decommissioning and restoration liabilities	$ 46,792	$ 89,408
Additions	17,759	22,158
Plant and equipment- ROU assets [Member] | Cost [Member]
Supplementary Cash Flow Information [Line Items]
Additions	17,759	22,158
Agreements With Communities [Member]
Supplementary Cash Flow Information [Line Items]
Additions	$ 116,233	$ 7,369
Rosemont Project [Member] | Agreement with United Copper & Moly LLC ("UCM") [Member]
Supplementary Cash Flow Information [Line Items]
Loan receivable balance written off			$ 25,978

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Segmented information (Narrative) (Details)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Customer 1 [Member]
Disclosure of major customers [line items]
Percentage of entity's revenue	36.00%	24.00%
Customer 2 [Member]
Disclosure of major customers [line items]
Percentage of entity's revenue	17.00%	9.00%
Customer 3 [Member]
Disclosure of major customers [line items]
Percentage of entity's revenue	13.00%	9.00%
Customer 4 [Member]
Disclosure of major customers [line items]
Percentage of entity's revenue	7.00%	8.00%
Customer 5 [Member]
Disclosure of major customers [line items]
Percentage of entity's revenue	7.00%	5.00%
Customer 6 [Member]
Disclosure of major customers [line items]
Percentage of entity's revenue	5.00%	5.00%
Customer 7 [Member]
Disclosure of major customers [line items]
Percentage of entity's revenue	5.00%
Customer 8 [Member]
Disclosure of major customers [line items]
Percentage of entity's revenue	5.00%

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Events after the reporting period (Narrative) (Details) - Events after the reporting period [Member] Tonne in Millions	Sep. 30, 2021 Ounce	Jun. 30, 2021 Tonne
Pampacancha delivery obligation [Member]
Disclosure of non-adjusting events after reporting period [line items]
Tonnes of ore contracts no longer expects to mine | Tonne		4
Stream transactions with Wheaton [Member]
Disclosure of non-adjusting events after reporting period [line items]
Additional ounces of gold required to be delivered | Ounce	8,020

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Significant accounting policies (Schedule of detailed information about estimated useful life or depreciation rate explanatory) (Details)	12 Months Ended
	Dec. 31, 2020
Equipment [Member]
Disclosure of detailed information about property, plant and equipment [line items]
Useful lives or depreciation rates, property, plant and equipment	straight-line over 1 to 20 years
Other plant assets [Member]
Disclosure of detailed information about property, plant and equipment [line items]
Useful lives or depreciation rates, property, plant and equipment	straight-line over 1 to 20 years/unit-of-production
ROU Assets [Member]
Disclosure of detailed information about property, plant and equipment [line items]
Useful lives or depreciation rates, property, plant and equipment	straight -line over 1 to 20 years

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Acquisition of remaining interest in the Rosemont project (Schedule of detailed information about consideration paid) (Details) - Rosemont Project [Member] - Agreement with United Copper & Moly LLC ("UCM") [Member] $ in Thousands	Apr. 25, 2019 USD ($)
Disclosure of detailed information about business combination [line items]
Cash	$ 45,000
Present value of future cash installments	23,557
Total consideration	$ 68,557

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Acquisition of remaining interest in the Rosemont project (Schedule of detailed information about assets acquired and liabilities assumed) (Details) - Rosemont Project [Member] - Agreement with United Copper & Moly LLC ("UCM") [Member] $ in Thousands	Apr. 25, 2019 USD ($)
Disclosure of detailed information about business combination [line items]
Current assets	$ 343
Non-current assets	68,904
Liabilities	(690)
Net assets acquired	$ 68,557

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Revenue and expenses (Schedule of detailed information about revenue) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Analysis of income and expense [abstract]
Copper	$ 563,910	$ 786,332
Zinc	264,106	284,897
Gold	180,949	120,366
Silver	25,986	29,315
Molybdenum	25,627	31,270
Other	5,619	4,760
Revenue from sale of goods	1,066,197	1,256,940
Non-cash streaming arrangement items
Amortization of deferred revenue - gold	27,854	32,028
Amortization of deferred revenue - silver	39,409	60,370
Amortization of deferred revenue - variable consideration adjustments - prior periods	6,668	(16,295)
Amortization of deferred revenue	73,931	76,103
Pricing and volume adjustments	9,178	(12,123)
Revenue excluding treatment and refining charges	1,149,306	1,320,920
Treatment and refining charges	(56,888)	(83,481)
Revenue	$ 1,092,418	$ 1,237,439

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Revenue and expenses (Schedule of depreciation and amortization expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Revenue And Expenses [Line Items]
Depreciation and amortization	$ 363,603	$ 346,634
Cost of sales [Member]
Revenue And Expenses [Line Items]
Depreciation and amortization	361,827	344,555
Selling and administrative expenses [Member]
Revenue And Expenses [Line Items]
Depreciation and amortization	$ 1,776	$ 2,079

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Revenue and expenses (Schedule of detailed information about share-based expense (recoveries) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Revenue And Expenses [Line Items]
Share-based compensation expenses	$ 15,008	$ 2,714
Cost of sales [Member]
Revenue And Expenses [Line Items]
Share-based compensation expenses	1,400	400
Selling and administrative expenses [Member]
Revenue And Expenses [Line Items]
Share-based compensation expenses	13,130	2,085
Other expenses [Member]
Revenue And Expenses [Line Items]
Share-based compensation expenses	478	229
Restricted Share Unit [Member]
Revenue And Expenses [Line Items]
Share-based compensation expenses	6,750	1,557
Restricted Share Unit [Member] | Cost of sales [Member]
Revenue And Expenses [Line Items]
Share-based compensation expenses	1,400	400
Restricted Share Unit [Member] | Selling and administrative expenses [Member]
Revenue And Expenses [Line Items]
Share-based compensation expenses	4,872	928
Restricted Share Unit [Member] | Other expenses [Member]
Revenue And Expenses [Line Items]
Share-based compensation expenses	478	229
Deferred Share Unit [Member]
Revenue And Expenses [Line Items]
Share-based compensation expenses	5,149	1,157
Deferred Share Unit [Member] | Cost of sales [Member]
Revenue And Expenses [Line Items]
Share-based compensation expenses	0	0
Deferred Share Unit [Member] | Selling and administrative expenses [Member]
Revenue And Expenses [Line Items]
Share-based compensation expenses	5,149	1,157
Deferred Share Unit [Member] | Other expenses [Member]
Revenue And Expenses [Line Items]
Share-based compensation expenses	0	0
Performance Share Unit [Member]
Revenue And Expenses [Line Items]
Share-based compensation expenses	1,987	0
Performance Share Unit [Member] | Cost of sales [Member]
Revenue And Expenses [Line Items]
Share-based compensation expenses	0	0
Performance Share Unit [Member] | Selling and administrative expenses [Member]
Revenue And Expenses [Line Items]
Share-based compensation expenses	1,987	0
Performance Share Unit [Member] | Other expenses [Member]
Revenue And Expenses [Line Items]
Share-based compensation expenses	0	0
Stock Options [Member]
Revenue And Expenses [Line Items]
Share-based compensation expenses	1,122	0
Stock Options [Member] | Cost of sales [Member]
Revenue And Expenses [Line Items]
Share-based compensation expenses	0	0
Stock Options [Member] | Selling and administrative expenses [Member]
Revenue And Expenses [Line Items]
Share-based compensation expenses	1,122	0
Stock Options [Member] | Other expenses [Member]
Revenue And Expenses [Line Items]
Share-based compensation expenses	$ 0	$ 0

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Revenue and expenses (Schedule of other operating expenses) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Revenue And Expenses [Line Items]
Other operating expenses	$ 17,583	$ 51,116
Regional costs [Member]
Revenue And Expenses [Line Items]
Other operating expenses	3,602	3,780
Loss on disposal of property,plant & equipment [Member]
Revenue And Expenses [Line Items]
Other operating expenses	5,088	4,807
Closure cost adjustment - non-producing properties [Member]
Revenue And Expenses [Line Items]
Other operating expenses	2,721	2,289
Allocation of community costs [Member]
Revenue And Expenses [Line Items]
Other operating expenses	2,880	2,216
Write down of UCM receivable [Member]
Revenue And Expenses [Line Items]
Other operating expenses	0	25,978
Pampacancha delivery obligation [Member]
Revenue And Expenses [Line Items]
Other operating expenses	0	7,499
Other [Member]
Revenue And Expenses [Line Items]
Other operating expenses	$ 3,292	$ 4,547

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Revenue and expenses (Schedule of detailed information about impairment) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Revenue And Expenses [Line Items]
Asset impairment loss	$ 0	$ 322,249
Arizona [Member]
Revenue And Expenses [Line Items]
Asset impairment loss		322,249
Tax impact - (recovery)		(80,143)
After-tax impairment charge		$ 242,106

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Revenue and expenses (Schedule of detailed information about employee benefits expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Revenue And Expenses [Line Items]
Current employee benefits	$ 179,486	$ 171,173
Share-based payments	15,008	2,714
Employee share purchase plan	1,783	1,645
Defined benefit plans	11,671	10,643
Defined contribution plans	1,774	1,635
Other post-retirement employee benefits	9,305	8,457
Termination benefits	582	628
Employee benefits expense	219,609	196,895
Stock Options [Member]
Revenue And Expenses [Line Items]
Share-based payments	1,122	0
Restricted Share Unit [Member]
Revenue And Expenses [Line Items]
Share-based payments	6,750	1,557
Deferred Share Unit [Member]
Revenue And Expenses [Line Items]
Share-based payments	5,149	1,157
Performance Share Unit [Member]
Revenue And Expenses [Line Items]
Share-based payments	$ 1,987	$ 0

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Revenue and expenses (Schedule of Finance income and expenses) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Net interest expense on long-term debt
Interest expense on long-term debt	$ 82,712	$ 78,265
Interest capitalized	0	(9,890)
Net interest expense on long-term debt	82,712	68,375
Accretion on streaming arrangements
Current year additions	60,362	63,725
Variable consideration adjustments - prior periods	(3,692)	6,047
Accretion on streaming arrangements	56,670	69,772
Change in fair value of financial assets and liabilities at fair value through profit or loss
Embedded derivatives	(45,387)	3,708
Gold prepayment liability	20,141	0
Investments	(4,124)	4,539
Change in fair value of financial assets and liabilities at fair value through profit or loss	(29,370)	8,247
Other net finance costs
Net foreign exchange (gains) losses	(1,644)	1,388
Accretion on community agreements measured at amortized cost	3,641	1,222
Unwinding of discounts on provisions	3,543	4,392
Withholding taxes	8,267	8,100
Premium paid on redemption of notes	7,252	0
Write-down of unamortized transaction costs	3,817	0
Other finance expense	8,826	11,027
Interest income	(1,812)	(8,527)
Other net finance costs	31,890	17,602
Net finance expense	$ 141,902	$ 163,996

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Trade and other receivables (Schedule of detailed information about trade and other receivables explanatory) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Current
Trade receivables	$ 107,787	$ 87,332
Statutory receivables	28,445	16,543
Other receivables	4,967	2,119
Total current trade and other receivables	141,199	105,994
Non-current
Taxes receivable	16,941	17,669
Other receivables	1,627	1,595
Trade and other non-current receivables	18,568	19,264
Trade and other receivables	$ 159,767	$ 125,258

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Inventories (Schedule of detailed information about inventories) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Current
Stockpile	$ 13,906	$ 10,396
Work in progress	6,364	14,420
Finished goods	72,923	62,230
Materials and supplies	49,912	51,774
Current Inventories	143,105	138,820
Non-current
Stockpile	16,704	14,626
Materials and supplies	5,302	4,829
Non current Inventories	22,006	19,455
Total Inventories	$ 165,111	$ 158,275

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Other financial assets (Schedule of other financial assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Current
Derivative assets	$ 2,736	$ 1,712
Restricted cash	337	337
Other current financial assets	3,073	2,049
Non-current
Investments at fair value through profit or loss	15,669	11,287
Total other financial assets	$ 18,742	$ 13,336

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Intangibles and other assets (Schedule of detailed information about intangible assets) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of reconciliation of changes in intangible assets [line items]
Balance, beginning of year	$ 5,027
Balance, end of year	5,409	$ 5,027
Cost [Member]
Disclosure of reconciliation of changes in intangible assets [line items]
Balance, beginning of year	21,538	18,557
Additions	1,466	2,325
Disposals	0	(96)
Effects of movement in exchange rates	346	752
Balance, end of year	23,350	21,538
Accumulated amortization [Member]
Disclosure of reconciliation of changes in intangible assets [line items]
Balance, beginning of year	16,511	14,395
Additions	1,138	1,606
Disposals	0	(96)
Effects of movement in exchange rates	292	606
Balance, end of year	$ 17,941	$ 16,511

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Property, plant and equipment (Schedule of detailed information about property, plant and equipment) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of detailed information about property, plant and equipment [line items]
Balance, beginning of year	$ 3,662,559
Additions	17,759	$ 22,158
Decommissioning and restoration	46,792	89,408
Interest capitalized	0	9,890
Impairments		(322,249)
Balance, end of year	3,731,655	3,662,559
Cost [Member]
Disclosure of detailed information about property, plant and equipment [line items]
Balance, beginning of year	5,806,084	5,577,753
Additions	303,653	181,855
Acquisitions		94,862
Capitalized stripping and development	83,137	103,108
Decommissioning and restoration	46,792	89,408
Interest capitalized	0	9,890
Transfers and other movements	0	0
Impairments		(322,249)
Disposals	(25,565)	(14,309)
Effects of movement in exchange rates	47,603	83,534
Other		2,232
Balance, end of year	6,261,704	5,806,084
Accumulated depreciation [Member]
Disclosure of detailed information about property, plant and equipment [line items]
Balance, beginning of year	2,143,525	1,742,961
Depreciation for the year	370,096	353,882
Disposals	(16,513)	(6,675)
Effects of movement in exchange rates	32,941	53,357
Balance, end of year	2,530,049	2,143,525
Exploration and evaluation assets [Member]
Disclosure of detailed information about property, plant and equipment [line items]
Balance, beginning of year	69,903
Balance, end of year	79,059	69,903
Exploration and evaluation assets [Member] | Cost [Member]
Disclosure of detailed information about property, plant and equipment [line items]
Balance, beginning of year	69,903	52,206
Additions	809	17,016
Acquisitions		0
Capitalized stripping and development	0	0
Decommissioning and restoration	0	0
Interest capitalized	0	0
Transfers and other movements	8,040	0
Impairments		0
Disposals	0	0
Effects of movement in exchange rates	307	681
Other		0
Balance, end of year	79,059	69,903
Exploration and evaluation assets [Member] | Accumulated depreciation [Member]
Disclosure of detailed information about property, plant and equipment [line items]
Balance, beginning of year	0	0
Depreciation for the year	0	0
Disposals	0	0
Effects of movement in exchange rates	0	0
Balance, end of year	0	0
Capital works in progress [Member]
Disclosure of detailed information about property, plant and equipment [line items]
Balance, beginning of year	733,874
Balance, end of year	957,162	733,874
Capital works in progress [Member] | Cost [Member]
Disclosure of detailed information about property, plant and equipment [line items]
Balance, beginning of year	733,874	873,781
Additions	256,251	109,372
Acquisitions		91,332
Capitalized stripping and development	0	0
Decommissioning and restoration	263	41
Interest capitalized	0	9,890
Transfers and other movements	(36,668)	(30,000)
Impairments		(322,249)
Disposals	0	(2,029)
Effects of movement in exchange rates	3,442	1,528
Other		2,208
Balance, end of year	957,162	733,874
Capital works in progress [Member] | Accumulated depreciation [Member]
Disclosure of detailed information about property, plant and equipment [line items]
Balance, beginning of year	0	0
Depreciation for the year	0	0
Disposals	0	0
Effects of movement in exchange rates	0	0
Balance, end of year	0	0
Mining properties [Member]
Disclosure of detailed information about property, plant and equipment [line items]
Balance, beginning of year	1,183,053
Balance, end of year	1,091,187	1,183,053
Mining properties [Member] | Cost [Member]
Disclosure of detailed information about property, plant and equipment [line items]
Balance, beginning of year	2,146,583	1,998,439
Additions	311	0
Acquisitions		3,157
Capitalized stripping and development	83,137	103,108
Decommissioning and restoration	6,849	3,314
Interest capitalized	0	0
Transfers and other movements	(41,256)	642
Impairments		0
Disposals	0	0
Effects of movement in exchange rates	21,837	41,080
Other		(3,157)
Balance, end of year	2,217,461	2,146,583
Mining properties [Member] | Accumulated depreciation [Member]
Disclosure of detailed information about property, plant and equipment [line items]
Balance, beginning of year	963,530	780,754
Depreciation for the year	146,113	154,970
Disposals	0	0
Effects of movement in exchange rates	16,631	27,806
Balance, end of year	1,126,274	963,530
Plant and equipment [Member]
Disclosure of detailed information about property, plant and equipment [line items]
Balance, beginning of year	1,584,065
Balance, end of year	1,522,138	1,584,065
Plant and equipment [Member] | Cost [Member]
Disclosure of detailed information about property, plant and equipment [line items]
Balance, beginning of year	2,653,752	2,473,176
Additions	28,523	33,309
Acquisitions		0
Capitalized stripping and development	0	0
Decommissioning and restoration	39,680	86,053
Interest capitalized	0	0
Transfers and other movements	70,777	30,406
Impairments		0
Disposals	(19,681)	(10,747)
Effects of movement in exchange rates	20,668	38,452
Other		3,103
Balance, end of year	2,793,719	2,653,752
Plant and equipment [Member] | Accumulated depreciation [Member]
Disclosure of detailed information about property, plant and equipment [line items]
Balance, beginning of year	1,069,687	872,330
Depreciation for the year	200,632	179,062
Disposals	(14,038)	(6,675)
Effects of movement in exchange rates	15,300	24,970
Balance, end of year	1,271,581	1,069,687
Plant and equipment- ROU assets [Member]
Disclosure of detailed information about property, plant and equipment [line items]
Balance, beginning of year	91,664
Balance, end of year	82,109	91,664
Plant and equipment- ROU assets [Member] | Cost [Member]
Disclosure of detailed information about property, plant and equipment [line items]
Balance, beginning of year	201,972	180,151
Additions	17,759	22,158
Acquisitions		373
Capitalized stripping and development	0	0
Decommissioning and restoration	0	0
Interest capitalized	0	0
Transfers and other movements	(893)	(1,048)
Impairments		0
Disposals	(5,884)	(1,533)
Effects of movement in exchange rates	1,349	1,793
Other		78
Balance, end of year	214,303	201,972
Plant and equipment- ROU assets [Member] | Accumulated depreciation [Member]
Disclosure of detailed information about property, plant and equipment [line items]
Balance, beginning of year	110,308	89,877
Depreciation for the year	23,351	19,850
Disposals	(2,475)	0
Effects of movement in exchange rates	1,010	581
Balance, end of year	$ 132,194	$ 110,308

XML

Trade and other payables (Schedule of detailed information about trade and other payables) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Trade and other payables [abstract]
Trade payables	$ 104,598	$ 68,742
Accruals and payables	72,698	80,375
Accrued interest	30,766	34,603
Exploration and evaluation payables	1,351	884
Statutory payables	23,734	7,800
Trade and other payables	$ 233,147	$ 192,404

XML

Other liabilities (Schedule of other current liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Current
Provisions	$ 33,675	$ 33,575
Pension liability	13,552	12,015
Other employee benefits	3,154	2,806
Unearned revenue	1,590	1,015
Other liabilities	$ 51,971	$ 49,411

XML

Other financial liabilities (Schedule of detailed information about other financial liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Current
Derivative liabilities	$ 15,312	$ 10,295
Embedded derivatives	0	9,074
Other financial liabilities at amortized cost	9,401	8,707
Other financial liabilities, current	24,713	28,076
Non-current
Deferred Rosemont acquisition consideration	25,961	24,491
Gold prepayment liability	137,031	0
Other financial liabilities at amortized cost	31,386	15,293
Other financial liabilities, non-current	194,378	39,784
Other financial liabilities	$ 219,091	$ 67,860

XML

Other financial liabilities (Schedule of detailed information about changes in other financial liabilities at amortized cost) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of financial liabilities [abstract]
Beginning balance	$ 24,000	$ 21,361
Net additions	116,233	7,369
Disbursements	(98,375)	(6,351)
Accretion	3,641	1,222
Effects of changes in foreign exchange	(4,712)	399
Ending balance	$ 40,787	$ 24,000

XML

Lease Liability (Schedule of additional information about leasing activities for lessee) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Lease liabilities [abstract]
Beginning balance	$ 81,947	$ 89,215
Additional capitalized leases	17,759	22,158
Lease payments	(35,980)	(32,952)
Accretion and other movements	(212)	3,526
Ending balance	63,514	81,947
Current lease liabilities			$ 33,473	$ 32,781
Non-current lease liabilities			30,041	49,166
Lease Liabilities	$ 63,514	$ 81,947	$ 63,514	$ 81,947

XML

Lease Liability (Schedule of expenses recognized to leases for which exemption applied) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Lease liabilities [abstract]
Short-term leases	$ 40,253	$ 45,745
Low value leases	353	92
Variable leases	57,389	56,152
Total	$ 97,995	$ 101,989

XML

Long-term debt (Schedule of borrowings) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of detailed information about borrowings [line items]
Total debt	$ 1,135,675	$ 985,255
Senior unsecured notes [Member]
Disclosure of detailed information about borrowings [line items]
Total debt	1,139,695	991,558	$ 989,306
Unamortized transaction costs - revolving credit facilities [Member]
Disclosure of detailed information about borrowings [line items]
Less: Unamortized transaction costs - revolving credit facilities	$ (4,020)	$ (6,303)	$ (8,276)

XML

Long-term debt (Schedule of detailed information about borrowings) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of detailed information about borrowings [line items]
Borrowings, beginning balance	$ 985,255
Addition to Principal	591,824
Principal repayments	(400,000)
Transaction costs	16,204	$ 26,149
Write-down of unamortized transaction costs	3,817	0
Borrowings, ending balance	1,135,675	985,255
Senior unsecured notes [Member]
Disclosure of detailed information about borrowings [line items]
Borrowings, beginning balance	991,558	989,306
Addition to Principal	591,824
Principal repayments	(400,000)
Transaction costs	8,176
Change in fair value of embedded derivative (prepayment option)	(47,169)	1,079
Write-down of unamortized transaction costs	2,315
Accretion of transaction costs and premiums	1,167	1,173
Borrowings, ending balance	$ 1,139,695	$ 991,558

XML

Long-term debt (Schedule of detailed information about unamortized transaction costs - revolving credit facilities) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of detailed information about borrowings [line items]
Write-down of unamortized transaction costs	$ (3,817)	$ 0
Unamortized transaction costs - revolving credit facilities [Member]
Disclosure of detailed information about borrowings [line items]
Unamortized transaction costs, beginning balance	6,303	8,276
Accretion of transaction costs	(3,062)	(2,342)
Write-down of unamortized transaction costs	(1,502)
Transaction costs	2,281	369
Unamortized transaction costs, ending balance	$ 4,020	$ 6,303

XML

Deferred revenue (Schedule of changes in deferred revenue) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure Of Deferred Revenue [Abstract]
Stream accounting - Deferred revenue, beginning balance	$ 563,756	$ 566,078
Amortization of deferred revenue
Liability drawdown	(67,263)	(92,398)
Variable consideration adjustments - prior periods	(6,668)	16,295
Accretion on streaming arrangements
Current year additions	60,362	63,725
Variable consideration adjustments - prior periods	(3,692)	6,047
Effects of changes in foreign exchange	189	4,009
Stream accounting - Deferred revenue, ending balance	$ 546,684	$ 563,756

XML

Deferred revenue (Schedule of detailed information about deferred revenue) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure Of Deferred Revenue [Abstract]
Current	$ 102,782	$ 86,933
Non-current	443,902	476,823
Deferred revenue	$ 546,684	$ 563,756	$ 566,078

XML

Provisions (Schedule of changes in provisions) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of other provisions [line items]
Provisions, beginning balance	$ 314,425	$ 218,924
Net additional provisions made	12,410	76,127
Amounts used	(23,704)	(15,525)
Unwinding of discount	3,543	4,392
Effect of change in discount rate	43,180	23,635
Effect of foreign exchange	7,509	7,648
Effect of change in share price	8,111	(776)
Provisions, ending balance	365,474	314,425
Decommissioning, restoration and similar liabilities [Member]
Disclosure of other provisions [line items]
Provisions, beginning balance	302,116	202,024
Net additional provisions made	5,868	68,881
Amounts used	(18,737)	(4,136)
Unwinding of discount	3,543	4,392
Effect of change in discount rate	43,180	23,635
Effect of foreign exchange	7,162	7,320
Effect of change in share price	0	0
Provisions, ending balance	343,132	302,116
Deferred share units [Member]
Disclosure of other provisions [line items]
Provisions, beginning balance	3,876	4,288
Net additional provisions made	1,628	1,479
Amounts used	(497)	(1,668)
Unwinding of discount	0	0
Effect of change in discount rate	0	0
Effect of foreign exchange	191	99
Effect of change in share price	3,521	(322)
Provisions, ending balance	8,719	3,876
Restricted share units [Member]
Disclosure of other provisions [line items]
Provisions, beginning balance	5,477	12,201
Net additional provisions made	3,642	2,885
Amounts used	(2,646)	(9,380)
Unwinding of discount	0	0
Effect of change in discount rate	0	0
Effect of foreign exchange	116	225
Effect of change in share price	3,860	(454)
Provisions, ending balance	10,449	5,477
Performance share unit [Member]
Disclosure of other provisions [line items]
Provisions, beginning balance	0	0
Net additional provisions made	1,257	0
Amounts used	0	0
Unwinding of discount	0	0
Effect of change in discount rate	0	0
Effect of foreign exchange	43	0
Effect of change in share price	730	0
Provisions, ending balance	2,030	0
Other provisions [Member]
Disclosure of other provisions [line items]
Provisions, beginning balance	2,956	411
Net additional provisions made	15	2,882
Amounts used	(1,824)	(341)
Unwinding of discount	0	0
Effect of change in discount rate	0	0
Effect of foreign exchange	(3)	4
Effect of change in share price	0	0
Provisions, ending balance	$ 1,144	$ 2,956

XML

Provisions (Schedule of detailed information about provisions) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of other provisions [line items]
Current provisions	$ 33,675	$ 33,575
Non-current provisions	331,799	280,850
Total provisions	365,474	314,425	$ 218,924
Decommissioning, restoration and similar liabilities [Member]
Disclosure of other provisions [line items]
Current provisions	20,308	23,621
Non-current provisions	322,824	278,495
Total provisions	343,132	302,116	202,024
Deferred share units [Member]
Disclosure of other provisions [line items]
Current provisions	8,719	3,876
Non-current provisions	0	0
Total provisions	8,719	3,876	4,288
Restricted share units [Member]
Disclosure of other provisions [line items]
Current provisions	4,648	4,468
Non-current provisions	5,801	1,009
Total provisions	10,449	5,477	12,201
Performance share unit [Member]
Disclosure of other provisions [line items]
Current provisions	0	0
Non-current provisions	2,030
Total provisions	2,030	0	0
Other provisions [Member]
Disclosure of other provisions [line items]
Current provisions	0	1,610
Non-current provisions	1,144	1,346
Total provisions	$ 1,144	$ 2,956	$ 411

XML

Pension obligations (Schedule of additional information about defined benefit plans) - (Details) - Pension obligations [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Pension Obligations [Line Items]
Opening defined benefit obligation	$ 243,733	$ 211,512
Current service cost	11,044	9,880
Interest cost	6,569	7,156
Benefits paid from plan	(35,384)	(16,745)
Benefits paid from employer	(1,317)	(934)
Participant contributions	48	64
Effects of movements in exchange rates	2,780	11,660
Arising from changes in demographic assumptions	(1,461)	0
Arising from changes in financial assumptions	16,967	29,609
Arising from experience adjustments	(2,625)	(2,258)
Settlement payments from plan assets	0	(6,307)
Loss on settlement	0	96
Closing defined benefit obligation	$ 240,354	$ 243,733

XML

Pension obligations (Schedule of additional information about defined benefit plans, balance by member group) - (Details) - Pension obligations [Member] - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Pension Obligations [Line Items]
Closing defined benefit obligation	$ 240,354	$ 243,733	$ 211,512
Active members [Member]
Pension Obligations [Line Items]
Closing defined benefit obligation	211,861	231,959
Deferred members [Member]
Pension Obligations [Line Items]
Closing defined benefit obligation	2,198	1,555
Retired members [Member]
Pension Obligations [Line Items]
Closing defined benefit obligation	$ 26,295	$ 10,219

XML

Pension obligations (Schedule of changes in fair value of plan assets) - (Details) - Pension obligations [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Pension Obligations [Line Items]
Opening fair value of plan assets	$ 202,119	$ 175,795
Interest income	5,695	6,170
Return on plan assets (excluding amounts included in net interest expense)	15,377	21,460
Contributions from the employer	12,987	11,952
Employer direct benefit payments	1,317	934
Contributions from plan participants	48	64
Benefit payment from employer	(1,317)	(934)
Administrative expenses paid from plan assets	(77)	(82)
Benefits paid	(35,384)	(16,745)
Settlement payments from plan assets	0	(6,307)
Effects of changes in foreign exchange rates	2,721	9,812
Closing fair value of plan assets	$ 203,486	$ 202,119

XML

Pension obligations (Schedule of net defined benefit liability (asset)) - (Details) - Pension obligations [Member] - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Pension Obligations [Line Items]
Present value of funded defined benefit obligation	$ 220,210	$ 224,364
Fair value of plan assets	(203,486)	(202,119)	$ (175,795)
Present value of unfunded defined benefit obligation	20,144	19,369
Net liability arising from defined benefit obligation	$ 36,868	$ 41,614

XML

Pension obligations (Schedule of detailed information about pension obligation) - (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Pension Obligations [Line Items]
Pension obligation - non-current	$ 23,316	$ 29,599
Pension obligations [Member]
Pension Obligations [Line Items]
Pension obligation - current	13,552	12,015
Pension obligation - non-current	23,316	29,599
Net liability	$ 36,868	$ 41,614

XML

Pension obligations (Schedule of detailed information about pension expense) - (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Pension Obligations [Line Items]
Defined benefit pension expense	$ 11,671	$ 10,643
Defined contribution pension expense	1,774	1,635
Pension obligations [Member]
Pension Obligations [Line Items]
Current service cost	11,044	9,880
Loss on settlement	0	96
Total service cost	11,044	9,976
Net interest expense	874	986
Administration cost	77	82
Defined benefit pension expense	11,995	11,044
Defined contribution pension expense	$ 1,791	$ 1,639

XML

Pension obligations (Schedule of detailed information about remeasurement on net defined benefit liability) - (Details) - Pension obligations [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Pension Obligations [Line Items]
Return on plan assets (excluding amounts included in net interest expense)	$ (15,377)	$ (21,460)
Actuarial gains arising from changes in demographic assumptions	(1,461)	0
Actuarial losses arising from changes in financial assumptions	16,967	29,609
Actuarial (gains)/losses arising from changes experience adjustments	(2,625)	(2,258)
Components recognized in statements of comprehensive income	(2,496)	5,891
Total pension cost	$ 11,290	$ 18,574

XML

Pension obligations (Schedule of defined benefit plan, assumptions used) - (Details) - Pension obligations [Member] - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Defined benefit cost [Member]
Pension Obligations [Line Items]
Expected rate of salary increase	2.75%	2.75%
Defined benefit cost [Member] | Benefit obligations [Member]
Pension Obligations [Line Items]
Discount rate	3.08%	3.73%
Defined benefit cost [Member] | Service cost [Member]
Pension Obligations [Line Items]
Discount rate	3.10%	3.75%
Defined benefit cost [Member] | Males [Member]
Pension Obligations [Line Items]
Average longevity at retirement age for current pensioners (years)	21.2	21.1
Defined benefit cost [Member] | Females [Member]
Pension Obligations [Line Items]
Average longevity at retirement age for current pensioners (years)	23.9	23.9
Defined benefit obligation [Member]
Pension Obligations [Line Items]
Discount rate	2.54%	3.08%
Expected rate of salary increase	2.75%	2.75%
Defined benefit obligation [Member] | Males [Member]
Pension Obligations [Line Items]
Average longevity at retirement age for current pensioners (years)	20.3	21.2
Average longevity at retirement age for current employees (future pensioners) (years)	22.2	23.0
Defined benefit obligation [Member] | Females [Member]
Pension Obligations [Line Items]
Average longevity at retirement age for current pensioners (years)	23.7	23.9
Average longevity at retirement age for current employees (future pensioners) (years)	25.4	25.6

XML

Pension obligations (Schedule of fair value of plan assets) - (Details) - Pension obligations [Member] - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Pension Obligations [Line Items]
Plan assets, at fair value	$ 203,486	$ 202,119	$ 175,795
Level 1 [Member]
Pension Obligations [Line Items]
Plan assets, at fair value	73,692	78,268
Level 2 [Member]
Pension Obligations [Line Items]
Plan assets, at fair value	129,794	123,851
Level 3 [Member]
Pension Obligations [Line Items]
Plan assets, at fair value	0	0
Money market instruments [Member]
Pension Obligations [Line Items]
Cash and cash equivalents, amount contributed to fair value of plan assets	4,766	1,588
Money market instruments [Member] | Level 1 [Member]
Pension Obligations [Line Items]
Cash and cash equivalents, amount contributed to fair value of plan assets	4,766	1,588
Money market instruments [Member] | Level 2 [Member]
Pension Obligations [Line Items]
Cash and cash equivalents, amount contributed to fair value of plan assets	0	0
Money market instruments [Member] | Level 3 [Member]
Pension Obligations [Line Items]
Cash and cash equivalents, amount contributed to fair value of plan assets	0	0
Pooled equity funds [Member]
Pension Obligations [Line Items]
Investment funds, amount contributed to fair value of plan assets	68,926	76,680
Pooled equity funds [Member] | Level 1 [Member]
Pension Obligations [Line Items]
Investment funds, amount contributed to fair value of plan assets	68,926	76,680
Pooled equity funds [Member] | Level 2 [Member]
Pension Obligations [Line Items]
Investment funds, amount contributed to fair value of plan assets	0	0
Pooled equity funds [Member] | Level 3 [Member]
Pension Obligations [Line Items]
Investment funds, amount contributed to fair value of plan assets	0	0
Pooled fixed income funds [Member]
Pension Obligations [Line Items]
Investment funds, amount contributed to fair value of plan assets	98,922	103,646
Pooled fixed income funds [Member] | Level 1 [Member]
Pension Obligations [Line Items]
Investment funds, amount contributed to fair value of plan assets	0	0
Pooled fixed income funds [Member] | Level 2 [Member]
Pension Obligations [Line Items]
Investment funds, amount contributed to fair value of plan assets	98,922	103,646
Pooled fixed income funds [Member] | Level 3 [Member]
Pension Obligations [Line Items]
Investment funds, amount contributed to fair value of plan assets	0	0
Alternative investment funds [Member]
Pension Obligations [Line Items]
Investment funds, amount contributed to fair value of plan assets	30,323	19,438
Alternative investment funds [Member] | Level 1 [Member]
Pension Obligations [Line Items]
Investment funds, amount contributed to fair value of plan assets	0	0
Alternative investment funds [Member] | Level 2 [Member]
Pension Obligations [Line Items]
Investment funds, amount contributed to fair value of plan assets	30,323	19,438
Alternative investment funds [Member] | Level 3 [Member]
Pension Obligations [Line Items]
Investment funds, amount contributed to fair value of plan assets	0	0
Balanced Fund [Member]
Pension Obligations [Line Items]
Investment funds, amount contributed to fair value of plan assets	549	767
Balanced Fund [Member] | Level 1 [Member]
Pension Obligations [Line Items]
Investment funds, amount contributed to fair value of plan assets	0	0
Balanced Fund [Member] | Level 2 [Member]
Pension Obligations [Line Items]
Investment funds, amount contributed to fair value of plan assets	549	767
Balanced Fund [Member] | Level 3 [Member]
Pension Obligations [Line Items]
Investment funds, amount contributed to fair value of plan assets	$ 0	$ 0

XML

Other employee benefits (Schedule of additional information about other employee benefit plans) - (Details) - Other employee benefits [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Other Employee Benefits [Line Items]
Opening defined benefit obligation	$ 116,696	$ 93,528
Current service cost	4,140	3,060
Past service cost	0	0
Interest cost	3,478	3,600
Effects of movements in exchange rates	2,423	4,864
Remeasurement actuarial (gains)/losses:
Arising from changes in demographic assumptions	(4,460)	0
Arising from changes in financial assumptions	10,043	14,094
Arising from experience adjustments	(489)	87
Benefits paid	(2,215)	(2,537)
Closing defined benefit obligation	$ 129,616	$ 116,696

XML

Other employee benefits (Schedule of additional information about other employee benefit plans, balance by member group) - (Details) - Other employee benefits [Member] - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Other Employee Benefits [Line Items]
Closing defined benefit obligation	$ 129,616	$ 116,696	$ 93,528
Active members [Member]
Other Employee Benefits [Line Items]
Closing defined benefit obligation	68,983	60,801
Inactive members [Member]
Other Employee Benefits [Line Items]
Closing defined benefit obligation	$ 60,633	$ 55,895

XML

Other employee benefits (Schedule of changes in fair value of assets of other employee benefits plan) (Details) - Other employee benefits [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Other Employee Benefits [Line Items]
Employer contributions	$ 2,215	$ 2,537
Benefits paid	(2,215)	(2,537)
Closing fair value of assets	$ 0	$ 0

XML

Other employee benefits (Schedule of net benefit liability for other employee benefits (Details) - Other employee benefits [Member] - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Other Employee Benefits [Line Items]
Unfunded benefit obligation	$ 129,616	$ 116,696	$ 93,528
Vacation accrual and other - non-current	3,046	2,888
Net liability	$ 132,662	$ 119,584

XML

Other employee benefits (Schedule of detailed information about other employee benefits plan) (Details) - Other employee benefits [Member] - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Other Employee Benefits [Line Items]
Other employee benefits liability - current	$ 3,154	$ 2,806
Other employee benefits liability - non-current	129,508	116,778
Net liability	$ 132,662	$ 119,584

XML

Other employee benefits (Schedule of detailed information about employee future benefit expense) (Details) - Other employee benefits [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Other Employee Benefits [Line Items]
Current service cost	$ 4,140	$ 3,060
Net interest expense	3,478	3,600
Components recognized in consolidated income statements	$ 7,618	$ 6,660

XML

Other employee benefits (Schedule of detailed information about remeasurement of other long term employee benefits) (Details) - Other employee benefits [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Other Employee Benefits [Line Items]
Actuarial gains arising from changes in demographic assumptions	$ (4,460)	$ 0
Actuarial losses arising from changes in financial assumptions	10,043	14,094
Actuarial (gains)/losses arising from changes experience adjustments	(489)	87
Components recognized in statements of comprehensive income	5,094	14,181
Total other employee future benefit cost	$ 12,712	$ 20,841

XML

Other employee benefits (Schedule of other employee benefit plan, assumptions used (Details) - Other employee benefits [Member] - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Defined benefit cost [Member]
Other Employee Benefits [Line Items]
Discount rate	3.17%	3.88%
Defined benefit cost [Member] | Initial [Member]
Other Employee Benefits [Line Items]
Weighted average health care trend rate	5.68%	5.74%
Defined benefit cost [Member] | Ultimate [Member]
Other Employee Benefits [Line Items]
Weighted average health care trend rate	4.00%	4.00%
Defined benefit cost [Member] | Males [Member]
Other Employee Benefits [Line Items]
Average longevity at retirement age for current pensioners (years)	21.2	21.1
Defined benefit cost [Member] | Females [Member]
Other Employee Benefits [Line Items]
Average longevity at retirement age for current pensioners (years)	23.9	23.9
Defined benefit obligation [Member]
Other Employee Benefits [Line Items]
Discount rate	2.76%	3.17%
Defined benefit obligation [Member] | Initial [Member]
Other Employee Benefits [Line Items]
Weighted average health care trend rate	5.66%	5.68%
Defined benefit obligation [Member] | Ultimate [Member]
Other Employee Benefits [Line Items]
Weighted average health care trend rate	4.00%	4.00%
Defined benefit obligation [Member] | Males [Member]
Other Employee Benefits [Line Items]
Average longevity at retirement age for current pensioners (years)	20.3	21.2
Average longevity at retirement age for current employees (future pensioners) (years)	22.2	23.1
Defined benefit obligation [Member] | Females [Member]
Other Employee Benefits [Line Items]
Average longevity at retirement age for current pensioners (years)	23.7	23.9
Average longevity at retirement age for current employees (future pensioners) (years)	25.4	25.6

XML

Income and mining taxes (Schedule of detailed information about effective income tax expense recovery) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Major components of tax expense (income) [abstract]
Current income tax expense	$ 4,458	$ 24,919
Mining taxes	4,671	4,720
Adjustments in respect of prior years	(398)	6,273
Current tax expense (income) and adjustments for current tax of prior periods	8,731	35,912
Income tax recoveries - origination, revaluation and/or reversal of temporary differences	(39,411)	(133,468)
Mining tax recoveries - origination, revaluation and/or reversal of temporary difference	(3,331)	(12,214)
Adjustments in respect of prior years	(494)	817
Deferred tax expense (income)	(43,236)	(144,865)
Tax recovery	$ (34,505)	$ (108,953)

XML

Income and mining taxes (Schedule of deferred taxes) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred income tax asset	$ 101,899	$ 75,046
Deferred income tax liability	(229,433)	(242,928)
Net deferred tax asset (liability)	(127,534)	(167,882)	$ (308,577)
Income tax effect of temporary differences [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred income tax asset	94,070	69,950
Deferred income tax liability	(220,568)	(233,218)
Net deferred tax asset (liability)	(126,498)	(163,268)
Mining tax effect of temporary differences recognized [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred income tax asset	7,829	5,096
Deferred income tax liability	$ (8,865)	$ (9,710)

XML

Income and mining taxes (Schedule of changes in deferred tax assets and liabilities) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Major components of tax expense (income) [abstract]
Net deferred tax liability balance, beginning of year	$ (167,882)	$ (308,577)
Deferred tax recovery	43,236	144,865
OCI transactions	(759)	1,878
Foreign currency translation on the deferred tax liability	(2,129)	(6,048)
Net deferred tax liability balance, end of year	$ (127,534)	$ (167,882)

XML

Income and mining taxes (Schedule of reconciliation to statutory tax rate) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Major components of tax expense (income) [abstract]
Statutory tax rate	26.30%	27.00%
Tax expense at statutory rate	$ (47,047)	$ (122,246)
Effect of Deductions related to mining taxes	(1,369)	(1,493)
Adjusted income taxes	(48,416)	(123,739)
Mining tax expense (recovery)	1,291	(6,674)
Adjusted income tax expense after mining tax expense (recovery)	(47,125)	(130,413)
Permanent differences related to capital items	(160)	3,270
Permanent differences related to other income tax permanent differences	(1,165)	1,747
Impact of remeasurement on decommissioning liability	7,094	(12,018)
Temporary income tax differences not recognized	(1,827)	(351)
Other temporary income tax differences not recognized	2,927	2,323
Non-deductible impairment on UCM receivable	0	7,041
Withholding tax on dividends	0	6,826
Impact related to differences in tax rates in foreign operations	5,534	20,338
Impact of changes to statutory tax rates	2,412	(259)
Foreign exchange on non-monetary items	(3,628)	(6,633)
Impact related to tax assessments and tax return amendments	1,433	(824)
Tax recovery	$ (34,505)	$ (108,953)

XML

Income and mining taxes (Schedule of temporary differences recognized) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred income tax (liability) asset	$ (127,534)	$ (167,882)	$ (308,577)
Property, plant and equipment [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred income tax asset	(88,368)	(96,841)
Deferred income tax (recovery) expense	(8,473)	13,434
Deferred income tax liability	292,858	259,145
Deferred income tax expense (recovery)	33,713	(79,892)
Pension obligation [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred income tax asset	9,467	11,332
Deferred income tax (recovery) expense	1,294	(1,115)
Other employee benefits [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred income tax asset	25,687	16,837
Deferred income tax (recovery) expense	(8,850)	3,349
Deferred income tax liability	203	(80)
Deferred income tax expense (recovery)	(176)	(320)
Decommissioning and restoration obligation [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred income tax asset	37,902	41,208
Deferred income tax (recovery) expense	3,307	(33,391)
Asset retirement obligations [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred income tax liability	(1,588)	(833)
Deferred income tax expense (recovery)	(756)	85
Non-capital losses [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred income tax asset	110,374	90,446
Deferred income tax (recovery) expense	(19,928)	(17,976)
Deferred income tax liability	(78,607)	(28,643)
Deferred income tax expense (recovery)	(49,965)	(1,269)
Share issue and debt costs [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred income tax asset	8,972	6,540
Deferred income tax (recovery) expense	(2,768)	4,361
Embedded derivative (prepayment option) [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred income tax asset	(13,137)	(694)
Deferred income tax (recovery) expense	12,443	245
Deferred revenue [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred income tax asset	(809)	(112)
Deferred income tax (recovery) expense	697	(12,839)
Other [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred income tax asset	3,982	1,234
Deferred income tax (recovery) expense	(4,516)	(7,755)
Deferred income tax liability	7,702	3,629
Deferred income tax expense (recovery)	4,073	7,302
Income tax effect of temporary differences [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred income tax asset	94,070	69,950
Deferred income tax (recovery) expense	(26,794)	(58,385)
Deferred income tax liability	220,568	233,218
Deferred income tax expense (recovery)	(13,111)	(74,094)
Deferred income tax (liability) asset	(126,498)	(163,268)
et deferred income tax expense (recovery)	$ (39,905)	$ (132,479)

XML

Income and mining taxes (Schedule of temporary differences not recognized) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Temporary differences not recognized	$ 573,971	$ 531,338
Property, plant and equipment [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Temporary differences not recognized	46,718	33,269
Capital losses [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Temporary differences not recognized	166,227	159,545
Other employee benefits [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Temporary differences not recognized	51,226	68,866
Asset retirement obligations [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Temporary differences not recognized	193,898	146,679
Non-capital losses [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Temporary differences not recognized	$ 115,902	$ 122,979

XML

Income and mining taxes (Schedule of temporary differences - deferred mining tax assets and liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Net deferred tax asset (liability)	$ (127,534)	$ (167,882)	$ (308,577)
Mining tax effect of temporary differences recognized [Member] | Canada [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Net deferred tax asset (liability)	7,829	5,095
Mining tax effect of temporary differences recognized [Member] | Peru [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Net deferred tax asset (liability)	$ (8,865)	$ (9,710)

XML

Share capital (Schedule of detailed information about shares activity) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of classes of share capital [line items]
Beginning and end of year - Amount	$ 1,699,806	$ 1,848,123	$ 2,178,856
Share capital [Member]
Disclosure of classes of share capital [line items]
Beginning and end of year - Common shares	261,272,151	261,272,151
Beginning and end of year - Amount	$ 1,777,340	$ 1,777,340	$ 1,777,340

XML

Share-based compensation (Schedule of number and weighted average exercise prices of other equity instruments) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020 $ / shares	Dec. 31, 2020 USD ($)	Dec. 31, 2019 $ / shares	Dec. 31, 2019 USD ($)
Deferred Share Unit [Member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Number of units granted during the year		465,889		337,999
Weighted average price (C$/unit) | $ / shares	$ 4.10		$ 5.89
Expenses recognized during the year		$ 5,149		$ 1,157
Payments made during the year		$ 497		$ 1,668
Restricted Share Unit [Member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Number of restricted share units, beginning of year		2,223,999		3,666,867
Number of units granted during the year		1,388,786		1,080,741
Credits for dividends		17,587		7,554
Number of units forfeited during the year		(44,678)		(573,914)
Number of units vested		(645,357)		(1,957,249)
Number of restricted share units, end of year		2,940,337		2,223,999
Weighted average price (C$/unit) | $ / shares	3.98		8.98
Expenses recognized during the year		$ 6,750		$ 1,557
Payments made during the year		$ 2,646		$ 9,380
Performance Share Unit [Member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Number of performance units, beginning of year		0		0
Number of units granted during the year		1,089,569		0
Credits for dividends		6,046		0
Number of performance units, end of year		1,095,615		0
Weighted average price (C$/unit) | $ / shares	$ 3.97		$ 0
Expenses recognized during the year		$ 1,987		$ 0
Payments made during the year		$ 0		$ 0

XML

Share-based compensation (Schedule of weighted average fair value assumptions used in the Black-Scholes valuation) (Details)	12 Months Ended
	Dec. 31, 2020 Month $ / shares
Disclosure of terms and conditions of share-based payment arrangement [abstract]
Weighted average share price at grant date (CAD)	$ 3.77
Risk-free rate	1.14%
Expected dividend yield	0.50%
Expected stock price volatility (based on historical volatility)	57.00%
Expected life of option (months) | Month	84
Weighted average per share fair value of stock options granted (CAD)	$ 2.02

XML

Share-based compensation (Schedule of range of exercise prices of share options) (Details)	12 Months Ended
	Dec. 31, 2020 Share $ / shares	Dec. 31, 2019 Share $ / shares	Dec. 31, 2018 Share $ / shares
Disclosure of range of exercise prices of outstanding share options [line items]
Number of options outstanding | Share	1,563,189	0	0
Weighted average exercise price	$ 3.77	$ 0	$ 0
Range of exercise prices $3.76 - $3.92 [Member]
Disclosure of range of exercise prices of outstanding share options [line items]
Number of options outstanding | Share	1,563,189
Weighted average remaining contractual life (years)	6 years 1 month 28 days
Weighted average exercise price	$ 3.77
Number of options exercisable | Share	0
Weighted average share price at exercise date	$ 0
Range of exercise prices $3.76 - $3.92 [Member] | Bottom of range [Member]
Disclosure of range of exercise prices of outstanding share options [line items]
Weighted average exercise price	3.76
Range of exercise prices $3.76 - $3.92 [Member] | Top of range [Member]
Disclosure of range of exercise prices of outstanding share options [line items]
Weighted average exercise price	$ 3.92

XML

Share-based compensation (Schedule of number and weighted average exercise prices of share options) (Details)	12 Months Ended
	Dec. 31, 2020 Share $ / shares	Dec. 31, 2019 Share $ / shares
Disclosure of terms and conditions of share-based payment arrangement [abstract]
Number of shares subject to option, beginning of year | Share	0	0
Weighted average exercise price of share options outstanding at beginning of period | $ / shares	$ 0	$ 0
Number of units granted during the year | Share	1,581,385	0
Weighted average exercise price of options granted | $ / shares	$ 3.77	$ 0
Stock options forfeited | Share	(18,196)	0
Weighted average exercise price of options forfeited | $ / shares	$ 3.76	$ 0
Number of shares subject to option, end of year | Share	1,563,189	0
Weighted average exercise price of share options outstanding at end of period | $ / shares	$ 3.77	$ 0

XML

Earnings per share (Schedule of earnings per share) (Details) - shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Basic earnings per share [abstract]
Basic and diluted weighted average common shares outstanding	261,272,151	261,272,151

XML

Financial instruments (Schedule of fair value measurement) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of fair value measurement of assets [line items]
Cash and cash equivalents	$ 439,135	$ 396,146	$ 515,497
Non-hedge derivative assets	2,736	1,712
Prepayment option - embedded derivative	49,754	2,585
Investments	15,669	11,287
Deferred Rosemont acquisition consideration	25,961	24,491
Finance leases	63,514	81,947	$ 89,215
Other financial liabilities	219,091	67,860
Senior unsecured notes	1,277,124	1,050,126
Embedded derivatives		9,074
Gold prepayment liability	137,031	0
Non-hedge derivative liabilities	15,312	10,295
Fair value [Member]
Disclosure of fair value measurement of assets [line items]
Cash and cash equivalents	439,135	396,146
Restricted cash	337	337
Trade and other receivables	114,381	91,046
Non-hedge derivative assets	2,736	1,712
Investments	15,669	11,287
Total financial assets	572,258	500,528
Trade and other payables	209,413	184,604
Deferred Rosemont acquisition consideration	25,961	24,491
Other financial liabilities	41,912	21,338
Senior unsecured notes	1,277,124	1,050,126
Embedded derivatives	0	9,074
Gold prepayment liability	137,031	0
Non-hedge derivative liabilities	15,312	10,295
Total financial liabilities	1,706,753	1,299,928
Net financial liability	(1,134,495)	(799,400)
Carrying Amounts [Member]
Disclosure of fair value measurement of assets [line items]
Cash and cash equivalents	439,135	396,146
Restricted cash	337	337
Trade and other receivables	114,381	91,046
Non-hedge derivative assets	2,736	1,712
Investments	15,669	11,287
Total financial assets	572,258	500,528
Trade and other payables	209,413	184,604
Deferred Rosemont acquisition consideration	25,961	24,491
Other financial liabilities	40,787	24,000
Senior unsecured notes	1,139,695	991,558
Embedded derivatives	0	9,074
Gold prepayment liability	137,031	0
Non-hedge derivative liabilities	15,312	10,295
Total financial liabilities	1,568,199	1,244,022
Net financial liability	$ (995,941)	$ (743,494)

XML

Financial instruments (Schedule of significant unobservable inputs used in fair value measurement of assets and liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Disclosure of fair value measurement of assets [line items]
Non-hedge derivatives	$ 2,736	$ 1,712
Investments at FVTPL	15,669	11,287
Financial assets measured at fair value	18,405	12,999
Embedded derivatives		9,074
Non-hedge derivatives	15,312	10,295
Gold prepayment liability	137,031	0
Other financial liabilities	41,912	21,338
Senior unsecured notes	1,277,124	1,050,126
Financial liabilities measured at fair value	1,471,379	1,090,833
Level 1 [Member]
Disclosure of fair value measurement of assets [line items]
Non-hedge derivatives	0	0
Investments at FVTPL	15,669	11,287
Financial assets measured at fair value	15,669	11,287
Embedded derivatives		0
Non-hedge derivatives	0	0
Gold prepayment liability	0
Other financial liabilities	0	0
Senior unsecured notes	1,277,124	1,050,126
Financial liabilities measured at fair value	1,277,124	1,050,126
Level 2 [Member]
Disclosure of fair value measurement of assets [line items]
Non-hedge derivatives	2,736	1,712
Investments at FVTPL	0	0
Financial assets measured at fair value	2,736	1,712
Embedded derivatives		9,074
Non-hedge derivatives	15,312	10,295
Gold prepayment liability	137,031
Other financial liabilities	0	0
Senior unsecured notes	0	0
Financial liabilities measured at fair value	152,343	19,369
Level 3 [Member]
Disclosure of fair value measurement of assets [line items]
Non-hedge derivatives	0	0
Investments at FVTPL	0	0
Financial assets measured at fair value	0	0
Embedded derivatives		0
Non-hedge derivatives	0	0
Gold prepayment liability	0
Other financial liabilities	41,912	21,338
Senior unsecured notes	0	0
Financial liabilities measured at fair value	$ 41,912	$ 21,338

XML

Financial instruments (Schedule of net position consisted of contracts awaiting final pricing) (Details) - Embedded Derivatives [Member] lb in Thousands	Dec. 31, 2020 lb oz $ / OZ $ / lbs	Dec. 31, 2019 lb oz $ / OZ $ / lbs
Copper [Member]
Disclosure of risk management strategy related to hedge accounting [line items]
Sales awaiting final pricing | lb	47,901	72,977
Average YTD price ($/unit) | $ / lbs	3.52	2.80
Gold [Member]
Disclosure of risk management strategy related to hedge accounting [line items]
Sales awaiting final pricing | oz	18,106	16,152
Average YTD price ($/unit) | $ / OZ	1,894	1,522
Silver [Member]
Disclosure of risk management strategy related to hedge accounting [line items]
Sales awaiting final pricing | oz	123,380	124,371
Average YTD price ($/unit) | $ / OZ	26.35	17.86

XML

Financial instruments (Schedule of detailed information about foreign currency risk) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of detailed information about financial instruments [line items]
Cash and cash equivalents	$ 439,135	$ 396,146	$ 515,497
Other financial assets	18,742	13,336
Other financial liabilities	(219,091)	(67,860)
Currency risk [Member] | Amounts Held In CAD [Member]
Disclosure of detailed information about financial instruments [line items]
Cash and cash equivalents	7,791	8,394
Trade and other receivables	31	374
Other financial assets	15,669	11,287
Trade and other payables	(6,104)	(5,719)
Other financial liabilities	0	0
Net financial liability	17,387	14,336
Currency risk [Member] | Amounts Held In USD [Member]
Disclosure of detailed information about financial instruments [line items]
Cash and cash equivalents	3,895	21,217
Trade and other receivables	43,316	56,998
Other financial assets	0	0
Trade and other payables	(1,419)	(435)
Other financial liabilities	0	0
Net financial liability	45,792	77,780
Currency risk [Member] | Amounts Held In PEN [Member]
Disclosure of detailed information about financial instruments [line items]
Cash and cash equivalents	4,141	7,617
Trade and other receivables	36,951	25,413
Other financial assets	0	0
Trade and other payables	(34,622)	(22,618)
Other financial liabilities	(40,787)	(24,000)
Net financial liability	$ (34,317)	$ (13,588)

XML

Financial instruments (Schedule of foreign currency risk) (Details) - Currency risk [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
USD / CAD exchange rate [Member]
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis, variance, percentage	10.00%	10.00%
Effect of variance increase on after-tax profit	$ 1.1	$ 3.4
Effect of variance decrease on after-tax profit	$ (1.4)	$ (4.1)
USD / PEN exchange rate [Member]
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis, variance, percentage	10.00%	10.00%
Effect of variance increase on after-tax profit	$ 2.0	$ 0.8
Effect of variance decrease on after-tax profit	$ (2.5)	$ (1.0)

XML

Financial instruments - (Schedule of commodity price risk) (Details) - Commodity price risk [Member] $ in Millions	12 Months Ended
	Dec. 31, 2020 USD ($) $ / lbs	Dec. 31, 2019 USD ($) $ / lbs
Copper prices [Member]
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis, variance, price | $ / lbs	0.30	0.30
Effect of variance increase on after-tax profit	$ (1.4)	$ (2.0)
Effect of variance decrease on after-tax profit	$ 1.4	$ 2.0
Zinc prices [Member]
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis, variance, price | $ / lbs	0.10	0.10
Effect of variance increase on after-tax profit	$ 0.3	$ 1.0
Effect of variance decrease on after-tax profit	$ (0.3)	$ (1.0)

XML

Financial instruments - (Schedule of share price risk) (Details) - Share price risk [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis, variance, percentage	25.00%	25.00%
Effect of variance increase on after-tax profit	$ 3.9	$ 2.8
Effect of variance decrease on after-tax profit	$ (3.9)	$ (2.8)

XML

Financial instruments - (Schedule of interest rate risk) (Details) - Interest rate risk [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of detailed information about financial instruments [line items]
Sensitivity analysis, variance, percentage	2.00%	2.00%
Effect of variance increase on after-tax profit	$ (38.0)	$ 2.3
Effect of variance decrease on after-tax profit	$ 48.5	$ (2.6)

XML

Financial instruments - (Schedule of liquidity risk) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disclosure of detailed information about financial instruments [line items]
Cash and cash equivalents	$ 439,135	$ 396,146	$ 515,497
Non-hedge derivative assets	2,736	1,712
Other financial liabilities	(219,091)	(67,860)
Long-term debt, including embedded derivative	(1,135,675)	(985,255)
Gold prepayment obligation	(137,031)	0
Finance lease liabilities	(63,514)	(81,947)	$ (89,215)
Embedded derivative		(9,074)
Derivative financial liabilities	(15,312)	(10,295)
Within one year [Member]
Disclosure of detailed information about financial instruments [line items]
Cash and cash equivalents	439,135	396,146
Restricted cash	337	337
Trade and other receivables	114,381	89,451
Non-hedge derivative assets	2,736	1,712
Assets used to manage liquidity risk	556,589	487,646
Trade and other payables, including embedded derivative	(209,413)	(184,604)
Other financial liabilities	(12,097)	(6,672)
Deferred Rosemont acquisition consideration	0	0
Long-term debt, including embedded derivative	(87,966)	(72,165)
Gold prepayment obligation	0
Non-derivative financial liabilities	(309,476)	(263,441)
Embedded derivative		(9,074)
Non-hedge derivative contracts	(15,312)	(10,295)
Derivative financial liabilities	(15,312)	(19,369)
13-36 months [Member]
Disclosure of detailed information about financial instruments [line items]
Cash and cash equivalents	0	0
Restricted cash	0
Trade and other receivables	0	0
Non-hedge derivative assets	0	0
Assets used to manage liquidity risk	0	0
Trade and other payables, including embedded derivative	0	0
Other financial liabilities	(9,483)	(4,811)
Deferred Rosemont acquisition consideration	(20,000)	(10,000)
Long-term debt, including embedded derivative	(168,188)	(149,500)
Gold prepayment obligation	(137,031)
Non-derivative financial liabilities	(334,702)	(164,311)
Embedded derivative		0
Non-hedge derivative contracts	0	0
Derivative financial liabilities	0	0
37-60 months [Member]
Disclosure of detailed information about financial instruments [line items]
Cash and cash equivalents	0	0
Restricted cash	0
Trade and other receivables	0	0
Non-hedge derivative assets	0	0
Assets used to manage liquidity risk	0	0
Trade and other payables, including embedded derivative	0	0
Other financial liabilities	(6,578)	(4,734)
Deferred Rosemont acquisition consideration	(10,000)	(20,000)
Long-term debt, including embedded derivative	(742,125)	(1,128,875)
Gold prepayment obligation	0
Non-derivative financial liabilities	(758,703)	(1,153,609)
Embedded derivative		0
Non-hedge derivative contracts	0	0
Derivative financial liabilities	0	0
More than 60 months [Member]
Disclosure of detailed information about financial instruments [line items]
Cash and cash equivalents	0	0
Restricted cash	0
Trade and other receivables	0	1,595
Non-hedge derivative assets	0	0
Assets used to manage liquidity risk	0	1,595
Trade and other payables, including embedded derivative	0	0
Other financial liabilities	(30,679)	(17,506)
Deferred Rosemont acquisition consideration	0	0
Long-term debt, including embedded derivative	(728,625)	0
Gold prepayment obligation	0
Non-derivative financial liabilities	(759,304)	(17,506)
Embedded derivative		0
Non-hedge derivative contracts	0	0
Derivative financial liabilities	0	0
Carrying amount [Member]
Disclosure of detailed information about financial instruments [line items]
Cash and cash equivalents	439,135	396,146
Restricted cash	337	337
Trade and other receivables	114,381	91,046
Non-hedge derivative assets	2,736	1,712
Assets used to manage liquidity risk	556,589	489,241
Trade and other payables, including embedded derivative	(209,413)	(184,604)
Other financial liabilities	(40,787)	(24,000)
Deferred Rosemont acquisition consideration	(25,961)	(24,491)
Long-term debt, including embedded derivative	(1,139,695)	(991,558)
Gold prepayment obligation	(137,031)
Non-derivative financial liabilities	(1,552,887)	(1,224,653)
Embedded derivative		(9,074)
Non-hedge derivative contracts	(15,312)	(10,295)
Derivative financial liabilities	(15,312)	(19,369)
Contractual cash flows [Member]
Disclosure of detailed information about financial instruments [line items]
Cash and cash equivalents	439,135	396,146
Restricted cash	337	337
Trade and other receivables	114,381	91,046
Non-hedge derivative assets	2,736	1,712
Assets used to manage liquidity risk	556,589	489,241
Trade and other payables, including embedded derivative	(209,413)	(184,604)
Other financial liabilities	(58,837)	(33,723)
Deferred Rosemont acquisition consideration	(30,000)	(30,000)
Long-term debt, including embedded derivative	(1,726,904)	(1,350,540)
Gold prepayment obligation	(137,031)
Non-derivative financial liabilities	(2,162,185)	(1,598,867)
Embedded derivative		(9,074)
Non-hedge derivative contracts	(15,312)	(10,295)
Derivative financial liabilities	$ (15,312)	$ (19,369)

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Commitments and contingencies - (Schedule of maturity analysis of operating lease payments) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Disclosure of maturity analysis of operating lease payments [line items]
Minimum lease payments payable under non-cancellable operating lease	$ 60,365	$ 84,255
Within one year [Member]
Disclosure of maturity analysis of operating lease payments [line items]
Minimum lease payments payable under non-cancellable operating lease	58,173	57,860
After one year but not more than five years [Member]
Disclosure of maturity analysis of operating lease payments [line items]
Minimum lease payments payable under non-cancellable operating lease	2,192	26,395
More than five years [Member]
Disclosure of maturity analysis of operating lease payments [line items]
Minimum lease payments payable under non-cancellable operating lease	$ 0	$ 0

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Related parties - (Schedule of Subsidiaries) (Details)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
HudBay Marketing & Sales Inc. [Member]
Disclosure of transactions between related parties [line items]
Beneficial ownership of ultimate controlling party (HudBay Minerals Inc.)	100.00%	100.00%
HudBay Peru Inc. [Member]
Disclosure of transactions between related parties [line items]
Beneficial ownership of ultimate controlling party (HudBay Minerals Inc.)	100.00%	100.00%
HudBay Peru S.A.C. [Member]
Disclosure of transactions between related parties [line items]
Beneficial ownership of ultimate controlling party (HudBay Minerals Inc.)	100.00%	100.00%
HudBay (BVI) Inc. [Member]
Disclosure of transactions between related parties [line items]
Beneficial ownership of ultimate controlling party (HudBay Minerals Inc.)	100.00%	100.00%
Hudbay Arizona Inc. [Member]
Disclosure of transactions between related parties [line items]
Beneficial ownership of ultimate controlling party (HudBay Minerals Inc.)	100.00%	100.00%
Rosemont Copper Company [Member]
Disclosure of transactions between related parties [line items]
Beneficial ownership of ultimate controlling party (HudBay Minerals Inc.)	100.00%	100.00%

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Related parties - (Schedule of Information about key management personnel) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of transactions between related parties [abstract]
Short-term employee benefits	$ 7,951	$ 8,319
Post-employment benefits	639	762
Long-term share-based awards	6,381	6,966
Total key management personnel compensation	$ 14,971	$ 16,047

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Supplementary cash flow information (Schedule of change in non-cash working capital) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Supplementary Cash Flow Information [Abstract]
Trade and other receivables	$ (37,720)	$ 3,252
Other financial assets/liabilities	4,077	12,540
Inventories	(2,867)	(11,759)
Prepaid expenses	(3,722)	(3,484)
Trade and other payables	36,247	5,613
Provisions and other liabilities	1,602	(2,590)
Increase (decrease) in working capital	$ (2,383)	$ 3,572

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Segmented information (Schedule of segments) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of operating segments [line items]
Revenue from external customers	$ 1,092,418	$ 1,237,439
Cost of sales
Mine operating costs	691,591	741,342
Depreciation and amortization	361,827	344,555
Gross profit	39,000	151,542
Selling and administrative expenses	41,408	36,170
Exploration and evaluation expenses	17,196	30,774
Other expenses	17,583	51,116
Impairment loss	0	322,249
Results from operating activities	(37,187)	(288,767)
Net interest expense on long term debt	82,712	68,375
Accretion on streaming arrangements	56,670	69,772
Change in fair value of financial instruments	(29,370)	8,247
Other net finance costs	31,890	17,602
Loss before tax	(179,089)	(452,763)
Tax recovery	(34,505)	(108,953)
Loss for the year	(144,584)	(343,810)
Manitoba [Member]
Disclosure of operating segments [line items]
Revenue from external customers	615,699	537,421
Cost of sales
Mine operating costs	391,504	385,159
Depreciation and amortization	177,552	135,429
Gross profit	46,643	16,833
Selling and administrative expenses	0	0
Exploration and evaluation expenses	6,491	18,476
Other expenses	8,382	8,201
Impairment loss		0
Results from operating activities	31,770	(9,844)
Peru [Member]
Disclosure of operating segments [line items]
Revenue from external customers	476,719	700,018
Cost of sales
Mine operating costs	300,087	356,183
Depreciation and amortization	184,275	209,126
Gross profit	7,643	134,709
Selling and administrative expenses	0	0
Exploration and evaluation expenses	6,295	5,804
Other expenses	4,901	14,022
Impairment loss		0
Results from operating activities	(18,839)	114,883
Arizona [Member]
Disclosure of operating segments [line items]
Revenue from external customers	0	0
Cost of sales
Mine operating costs	0	0
Depreciation and amortization	0	0
Gross profit	0	0
Selling and administrative expenses	0	0
Exploration and evaluation expenses	3,870	0
Other expenses	2,066	28,149
Impairment loss		322,249
Results from operating activities	(5,936)	(350,398)
Corporate and other activities [Member]
Disclosure of operating segments [line items]
Revenue from external customers	0	0
Cost of sales
Mine operating costs	0	0
Depreciation and amortization	0	0
Gross profit	0	0
Selling and administrative expenses	41,408	36,170
Exploration and evaluation expenses	540	6,494
Other expenses	2,234	744
Impairment loss		0
Results from operating activities	$ (44,182)	$ (43,408)

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Segmented information (Schedule of segments, assets and liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Disclosure of operating segments [line items]
Total assets	$ 4,666,645	$ 4,461,057
Total liabilities	2,966,839	2,612,934
Property, plant and equipment	3,731,655	3,662,559
Manitoba [Member]
Disclosure of operating segments [line items]
Total assets	801,691	779,896
Total liabilities	562,013	556,267
Property, plant and equipment	699,884	684,679
Peru [Member]
Disclosure of operating segments [line items]
Total assets	2,535,939	2,556,895
Total liabilities	973,756	926,642
Property, plant and equipment	2,290,097	2,253,404
Arizona [Member]
Disclosure of operating segments [line items]
Total assets	718,982	700,799
Total liabilities	76,926	78,988
Property, plant and equipment	709,939	691,538
Corporate and other activities [Member]
Disclosure of operating segments [line items]
Total assets	610,033	423,467
Total liabilities	1,354,144	1,051,037
Property, plant and equipment	31,735	32,938
Corporate and other activities [Member] | Nevada [Member]
Disclosure of operating segments [line items]
Property, plant and equipment	$ 27,500	$ 27,300

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Segmented information (Schedule of segments, additions to property, plant and equipment) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of operating segments [line items]
Additions to property, plant and equipment	$ 386,790	$ 284,963
Manitoba [Member]
Disclosure of operating segments [line items]
Additions to property, plant and equipment	159,313	143,418
Peru [Member]
Disclosure of operating segments [line items]
Additions to property, plant and equipment	208,805	101,717
Arizona [Member]
Disclosure of operating segments [line items]
Additions to property, plant and equipment	18,640	38,923
Corporate and other activities [Member]
Disclosure of operating segments [line items]
Additions to property, plant and equipment	$ 32	$ 905

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Segmented information (Schedule of geographical areas, revenue by customer location) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of operating segments [line items]
Revenue from external customers	$ 1,092,418	$ 1,237,439
Canada [Member]
Disclosure of operating segments [line items]
Revenue from external customers	422,403	418,636
China [Member]
Disclosure of operating segments [line items]
Revenue from external customers	215,278	158,795
United States [Member]
Disclosure of operating segments [line items]
Revenue from external customers	206,906	209,382
Philippines [Member]
Disclosure of operating segments [line items]
Revenue from external customers	77,575	71,506
Peru [Member]
Disclosure of operating segments [line items]
Revenue from external customers	56,437	110,411
Switzerland [Member]
Disclosure of operating segments [line items]
Revenue from external customers	55,703	162,167
Singapore [Member]
Disclosure of operating segments [line items]
Revenue from external customers	29,314	71,506
Germany [Member]
Disclosure of operating segments [line items]
Revenue from external customers	11,725	10,731
Other [Member]
Disclosure of operating segments [line items]
Revenue from external customers	$ 17,077	$ 24,305