Westchester is the only county in New York State with a AAA rating from two rating services. The Westchester County Budget Office serves as staff to the County Executive and the County Board of Legislators on  budget issues. The department prepares the annual operating budgets and capital budgets for the county and its four water districts, 11 sewer districts and one refuse disposal district, as well as for Westchester Community College.

County taxes account for between 15-20 percent of a total property tax bill. The remainder of taxes are levied by school districts and local governments.