disposable income

from WordNet (r) 3.0 (2006)

disposable income
    n 1: income (after taxes) that is available to you for saving or
         spending

from The Collaborative International Dictionary of English v.0.48

disposable income \dis*pos"a*ble in"come\, n. (Economics)
   that portion of income which is available for spending on
   discretionary purchases; for individuals, it is usually
   calculated as total income less taxes. National disposable
   income, which is the disposable income of all individuals and
   businesses, is calculated as total national income minus
   taxes plus transfer payments. --Dornbusch and Fischer
   (Macroeconomics)
   [PJC]