What branch writes federal budget?

The federal budget is primarily written by the executive branch, specifically the Office of Management and Budget (OMB), which prepares the budget proposal based on the President's priorities. This proposal is then submitted to Congress, where it is reviewed, modified, and ultimately approved by both the House of Representatives and the Senate. Congress, particularly the House and Senate committees on appropriations, plays a critical role in shaping and finalizing the budget through legislative processes.