The Budget divides all spending into two broad categories. About 30% of federal spending is called “discretionary spending,” because the amount of spending flows from annual funding decisions by Congress’ Appropriations Committees.
(The other 70% of the budget is called “mandatory spending,” because the amount of outlays flow from legal obligations of the federal government established in law–mostly in the form of “entitlement” programs such as Social Security, Medicare, and Medicaid.)
The 30% of the budget that is “discretionary” is about one-half funding for defense programs and one-half for non-defense programs.
Discretionary spending is enacted annually by the Appropriations Committees through 12 regular appropriations bills (although sometimes the bills are packaged together into an “omnibus” measure.”)
For current details on appropriations, click here for: