This bill, the Cost-Share Accountability Act of 2025, amends the Energy Policy Act of 2005 to establish new reporting requirements for the Department of Energy. Its core purpose is to enhance transparency regarding the Department's use of its authority to reduce or eliminate certain cost-sharing requirements for projects. The bill mandates that the Secretary of Energy submit reports to specific House and Senate committees, including the Committees on Appropriations and Energy and Natural Resources, within 120 days of enactment and quarterly thereafter . These reports must detail how the Department has exercised its discretion in modifying cost-share obligations, and importantly, they must also be made publicly available to ensure broad access to this information.