INTERNAL CONTROL RPT

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the shareholders and the Board of Trustees of American Century Government Income Trust

In planning and performing our audits of the financial statements of American Century Government Income Trust (the “Trust”), including Capital Preservation Fund, Ginnie Mae Fund, Government Bond Fund, Inflation-Adjusted Bond Fund, and Short-Term Government Fund, as of and for the year ended March 31, 2024, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), we considered the Trust’s internal control over financial reporting, including controls over safeguarding securities, as a basis for designing our auditing procedures for the purpose of expressing our opinion on the financial statements and to comply with the requirements of Form N-CEN, but not for the purpose of expressing an opinion on the effectiveness of the Trust’s internal control over financial reporting. Accordingly, we express no such opinion.

The management of the Trust is responsible for establishing and maintaining effective internal control over financial reporting. In fulfilling this responsibility, estimates and judgments by management are required to assess the expected benefits and related costs of controls. 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 trustees of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of a 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.

A deficiency in internal control over financial reporting exists when the design or operation of a control does not allow management or employees, in the normal course of performing their assigned functions, to prevent or detect misstatements on a timely basis. A material weakness is a deficiency, or a combination of deficiencies, in internal control over financial reporting, such that there is a reasonable possibility that a material misstatement of the company’s annual or interim financial statements will not be prevented or detected on a timely basis.

Our consideration of the Trust’s internal control over financial reporting was for the limited purpose described in the first paragraph and would not necessarily disclose all deficiencies in internal control that might be material weaknesses under standards established by the PCAOB. However, we noted no deficiencies in the Trust’s internal control over financial reporting and its operation, including controls for safeguarding securities, that we consider to be a material weakness, as defined above, as of March 31, 2024.

This report is intended solely for the information and use of management and the Board of Trustees of the Trust and the Securities and Exchange Commission and is not intended to be and should not be used by anyone other than these specified parties.

/s/ Deloitte & Touche LLP

Kansas City, Missouri

May 16, 2024

OTHER REQUIRED INFO

Pursuant to the Fund’s procedures adopted under Rule 10f-3, the Fund’s Board of Directors/Trustees receives a quarterly report in the form of a checklist as to the satisfaction of the applicable conditions of paragraph (c)(1) through (c)(8) of Rule 10f-3.

Fund	Government Bond Fund
Issuer	Federal Home Loan Bank
Ticker/Sedol	3130AWN63
Principal Amount (US$)	$997,340,000
Principal Amount (Foreign$)	N/A
Amount Purchased (US$)	$3,989,360.00
Amount Purchased (Foreign$)	N/A
Trade Date	7/13/2023
Price (US$)	$99.734
Price-Foreign	N/A
Underwriter	Wells Fargo Securities, LLC
Other Syndicate Members:	Barclays Capital Inc., Nomura Securities International, Inc.
Underwriting Spread	0.100%
Currency	USD

Fund	Short-Term Government Fund
Issuer	Federal Home Loan Bank
Ticker/Sedol	3130AWN63
Principal Amount (US$)	$997,340,000
Principal Amount (Foreign$)	N/A
Amount Purchased (US$)	$997,340.00
Amount Purchased (Foreign$)	N/A
Trade Date	7/13/2023
Price (US$)	$99.734
Price-Foreign	N/A
Underwriter	Wells Fargo Securities, LLC
Other Syndicate Members:	Barclays Capital Inc., Nomura Securities International, Inc.
Underwriting Spread	0.100%
Currency	USD

Fund	Government Bond Fund
Issuer	Federal Home Loan Bank
Ticker/Sedol	3130AXU63
Principal Amount (US$)	$1,397,522,000
Principal Amount (Foreign$)	N/A
Amount Purchased (US$)	$7,985,840.00
Amount Purchased (Foreign$)	N/A
Trade Date	11/15/2023
Price (US$)	$99.823
Price-Foreign	N/A
Underwriter	Wells Fargo Securities, LLC
Other Syndicate Members:	Barclays Capital Inc., Nomura Securities International, Inc.
Underwriting Spread	0.075%
Currency	USD

Fund	Short-Term Government Fund
Issuer	Federal Home Loan Bank
Ticker/Sedol	3130AXU63
Principal Amount (US$)	$1,397,522,000
Principal Amount (Foreign$)	N/A
Amount Purchased (US$)	$1,996,460.00
Amount Purchased (Foreign$)	N/A
Trade Date	11/15/2023
Price (US$)	$99.823
Price-Foreign	N/A
Underwriter	Wells Fargo Securities, LLC
Other Syndicate Members:	Barclays Capital Inc., Nomura Securities International, Inc.
Underwriting Spread	0.075%
Currency	USD