Organization	6 Months Ended
Jun. 30, 2026
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization	Organization TPG Twin Brook Capital Income Fund (“TCAP” or the “Company”) is a Delaware statutory trust which was formed on January 27, 2022 (date of inception). On September 25, 2024, the Company’s name was changed from “AG Twin Brook Capital Income Fund” to “TPG Twin Brook Capital Income Fund”. AGTB Fund Manager, LLC (the “Adviser”), an indirect wholly-owned subsidiary of TPG Inc. (“TPG”) (Nasdaq: TPG), a leading global alternative investment firm, serves as the investment adviser of the Company. The Adviser is registered as an investment adviser with the U.S. Securities and Exchange Commission (the “SEC”) under the Investment Advisers Act of 1940. The Company has elected to be regulated as a business development company (“BDC”) under the Investment Company Act of 1940, as amended (“1940 Act”). The Company has elected to be treated for federal income tax purposes and intends to qualify annually as a regulated investment company (“RIC”) as defined under Subchapter M of the Internal Revenue Code of 1986, as amended (the “Code”). There were no operations other than those related to the Company’s organization and preparation for its public, ongoing offering prior to December 31, 2022. As of December 31, 2022, the Adviser contributed $50,000 of capital to the Company. In exchange for this contribution, the Adviser had received 2,000 Class I common shares of beneficial interest, par value $0.001 per share of TCAP (“Class I shares”), together with Class S common shares of beneficial interest (“Class S shares”) and Class D common shares of beneficial interest (“Class D shares”), par value $0.001, the “TCAP Common Shares”). On December 15, 2022, the Company’s registration statement on Form N-2, registering the continuous offer and sale (the “Offering”) of up to $5 billion in the Company’s common shares of beneficial interest, was declared effective by the SEC. The Company’s investment objective is to seek to generate attractive, consistent total returns, predominantly in the form of current income and, to a lesser extent, capital appreciation, by targeting investment opportunities with favorable risk-adjusted returns.

Organization

6 Months Ended

Jun. 30, 2026

Organization, Consolidation and Presentation of Financial Statements [Abstract]

TPG Twin Brook Capital Income Fund (“TCAP” or the “Company”) is a Delaware statutory trust which was formed on January 27, 2022 (date of inception). On September 25, 2024, the Company’s name was changed from “AG Twin Brook Capital Income Fund” to “TPG Twin Brook Capital Income Fund”. AGTB Fund Manager, LLC (the “Adviser”), an indirect wholly-owned subsidiary of TPG Inc. (“TPG”) (Nasdaq: TPG), a leading global alternative investment firm, serves as the investment adviser of the Company. The Adviser is registered as an investment adviser with the U.S. Securities and Exchange Commission (the “SEC”) under the Investment Advisers Act of 1940. The Company has elected to be regulated as a business development company (“BDC”) under the Investment Company Act of 1940, as amended (“1940 Act”). The Company has elected to be treated for federal income tax purposes and intends to qualify annually as a regulated investment company (“RIC”) as defined under Subchapter M of the Internal Revenue Code of 1986, as amended (the “Code”).

There were no operations other than those related to the Company’s organization and preparation for its public, ongoing offering prior to December 31, 2022. As of December 31, 2022, the Adviser contributed $50,000 of capital to the Company. In exchange for this contribution, the Adviser had received 2,000 Class I common shares of beneficial interest, par value $0.001 per share of TCAP (“Class I shares”), together with Class S common shares of beneficial interest (“Class S shares”) and Class D common shares of beneficial interest (“Class D shares”), par value $0.001, the “TCAP Common Shares”).

On December 15, 2022, the Company’s registration statement on Form N-2, registering the continuous offer and sale (the “Offering”) of up to $5 billion in the Company’s common shares of beneficial interest, was declared effective by the SEC.

The Company’s investment objective is to seek to generate attractive, consistent total returns, predominantly in the form of current income and, to a lesser extent, capital appreciation, by targeting investment opportunities with favorable risk-adjusted returns.