This bill, titled the "Stop Secret Spending Act of 2025," significantly amends the Federal Funding Accountability and Transparency Act of 2006 (FFATA) to enhance transparency in federal spending. Its primary objective is to ensure that other transaction agreements (OTAs) are reported to USAspending.gov , a federal website designed to provide public access to information on federal spending. The legislation mandates the automatic transmission of data related to these agreements to the website and requires a centralized, accessible view of this information within three years of the Act's enactment. To further promote accountability, the bill requires an annual report on unreported federal spending , detailing the total amount and reasons for non-disclosure, such as national security classifications or specific agency exemptions. It also establishes new requirements for the quality of information posted by federal agencies, ensuring data completeness and accuracy, and grants the Secretary of the Treasury and the Director of the Office of Management and Budget authority to verify this data. Furthermore, the bill outlines an implementation plan, including interim reports and a congressional plan, if OTA data is not fully integrated into USAspending.gov within specified timelines. Additionally, the Act modifies requirements for Inspector General reports , specifying which agencies must submit them and setting new biennial deadlines for a decade. It also directs the Comptroller General of the United States to recommend updates to the Federal Acquisition Regulation within one year to incorporate FFATA requirements, thereby strengthening compliance across federal contracts. These provisions collectively aim to broaden the scope of transparent federal financial reporting and improve data integrity.