In 2017, the US government spent $58B on Accounting and related services (except IT support services) for trade, professional, and business. The agency which purchased the largest amount of Accounting and related services (except IT support services) for trade, professional, and business in 2017 was Department of the Air Force ($9.24B), followed by Department of the Army ($8.88B) and the Department of the Navy ($6.38B).