This bill, titled the "Coin Metal Modification Authorization and Cost Savings Act of 2025," empowers the Director of the United States Mint to alter the metallic composition of circulating coins. The primary goal of such modifications is to reduce costs incurred by taxpayers . Before implementing any changes, the Director must conduct a comprehensive study, including input from industry stakeholders, to ensure the modifications meet specific criteria. These criteria mandate that any new coin composition must be seamless , meaning coins retain their original diameter and weight and remain interchangeable in most coin acceptors. Furthermore, the changes must have minimal adverse impact on the public and other stakeholders. The Director is required to notify Congress at least 90 legislative days prior to any modification, providing detailed justification and certifications, and Congress retains the authority to disapprove the proposed changes through a joint resolution.