CBO Scoring Accountability Act

HR 2666, the CBO Scoring Accountability Act, requires the Congressional Budget Office (CBO) to annually analyze and publicly report on the actual costs and revenue impacts of major federal legislation for the first 10 years after it becomes law. It mandates that the CBO compare actual spending/revenue results against prior estimates, and if discrepancies exceed 10% for costs or revenue, the CBO must explain the causes in a report to Congress. This applies to bills projected to affect at least 0.25% of U.S. GDP in spending or revenue (defined as "major legislation"), and federal agencies must provide data to support these analyses. The bill aims to improve transparency around budget estimates without altering legislative processes.