The "Stop Secret Spending Act of 2025" seeks to significantly enhance the transparency of federal spending by amending the Federal Funding Accountability and Transparency Act of 2006 (FFATA). A primary focus is to ensure that other transaction agreements (OTAs) , which are flexible contracts often used for research and development, are fully reported and made publicly available on USAspending.gov. Specifically, the bill requires the Secretary of the Treasury to ensure that data related to OTAs is automatically transmitted to USAspending.gov and presented in a centralized view within three years of the Act's enactment. If this deadline is not met, interim reports and implementation plans must be provided to Congress. Furthermore, the legislation mandates an annual report on USAspending.gov detailing the total amount of federal spending that has not been posted to the website, along with the specific reasons for its exclusion, such as national security classifications or awards by legislative or judicial branch agencies. To improve the overall integrity of reported data, the bill establishes new requirements for data quality and accuracy . The Secretary of the Treasury and the Director of the Office of Management and Budget (OMB) are tasked with setting standards and verifying that information posted by federal agencies is complete, accurate, and consistent. Federal agencies themselves are made responsible for ensuring the completeness and accuracy of their reported data. Additionally, the Act requires the Secretary, in coordination with the Director, to periodically assess and publish a list of federal agencies and components that are required to post information under FFATA. This ensures clear accountability for reporting. Finally, the bill includes amendments to Inspector General reporting requirements and directs the Comptroller General to recommend updates to the Federal Acquisition Regulation to incorporate FFATA's transparency mandates.