The main purpose of the Cost Openness and Spending Transparency Act of 2025, also known as the COST Act, is to enhance transparency regarding how federal funds are spent on various programs, projects, or activities. The goal is to ensure that the public has clear information about the financial contributions made by federal funds compared to other sources of funding. Key provisions of the COST Act require federal agencies and any entities receiving federal funds, such as state and local governments or organizations, to disclose specific financial information.