discretionary spending

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun economics The amount or portion of a person's or group's expenditures which is used for non-essential or voluntary disbursements; the amount or portion of one's expenditures which one may make as one sees fit.
• noun The action of making such expenditures.
• noun US, government finances US government expenditures which are subject to annual review and authorization by Congress, as distinct from expenditures authorized by existing laws.