The Company	6 Months Ended
Jun. 30, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract]
The Company	The Company HA Sustainable Infrastructure Capital, Inc. (the “Company”), actively partners with clients to deploy real assets that facilitate the energy transition. Our investments take various forms, including equity, joint ventures, land ownership, lending, and other financing transactions. We generate recurring income from net investment income from our portfolio, from income through our residual ownership in securitization and co-investment structures, and from asset management and other services. We also generate income through gain-on-sale securitization transactions, broker/dealer and other services. The Company and its subsidiaries are hereafter referred to as “we,” “us” or “our.” We refer to the income-producing assets that we hold on our balance sheet as our “Portfolio.” Our Portfolio includes equity investments in either preferred or common structures in unconsolidated entities, receivables, and debt securities. We finance our business through cash on hand, secured and unsecured debt, convertible securities, or equity issuances and may also decide to finance such transactions through the use of off-balance sheet securitization or syndication structures. Our common stock is listed on the New York Stock Exchange (“NYSE”) under the symbol “HASI.” We intend to continue to operate our business in a manner that will maintain our exemption from registration as an investment company under the Investment Company Act of 1940 (the “1940 Act”), as amended. We operate our business through, and along with two of our wholly owned subsidiaries serve as the general partners of, our operating partnership subsidiary, Hannon Armstrong Sustainable Infrastructure, L.P., (the “Operating Partnership”), which was formed to acquire and directly or indirectly own our assets.

The Company

6 Months Ended

Jun. 30, 2025

Organization, Consolidation and Presentation of Financial Statements [Abstract]

HA Sustainable Infrastructure Capital, Inc. (the “Company”), actively partners with clients to deploy real assets that facilitate the energy transition. Our investments take various forms, including equity, joint ventures, land ownership, lending, and other financing transactions. We generate recurring income from net investment income from our portfolio, from income through our residual ownership in securitization and co-investment structures, and from asset management and other services. We also generate income through gain-on-sale securitization transactions, broker/dealer and other services.

The Company and its subsidiaries are hereafter referred to as “we,” “us” or “our.” We refer to the income-producing assets that we hold on our balance sheet as our “Portfolio.” Our Portfolio includes equity investments in either preferred or common structures in unconsolidated entities, receivables, and debt securities. We finance our business through cash on hand, secured and unsecured debt, convertible securities, or equity issuances and may also decide to finance such transactions through the use of off-balance sheet securitization or syndication structures.

Our common stock is listed on the New York Stock Exchange (“NYSE”) under the symbol “HASI.” We intend to continue to operate our business in a manner that will maintain our exemption from registration as an investment company under the Investment Company Act of 1940 (the “1940 Act”), as amended. We operate our business through, and along with two of our wholly owned subsidiaries serve as the general partners of, our operating partnership subsidiary, Hannon Armstrong Sustainable Infrastructure, L.P., (the “Operating Partnership”), which was formed to acquire and directly or indirectly own our assets.