shortfall

noun

1. 1

   An instance of not meeting a quota, debt, or monthly payment on a debt or other obligation, or of having an insufficient amount to cover such obligations.

   “Due to a shortfall in revenue, we will have to make some cuts.”

2. 2

   The amount by which a quota, debt, or monthly payment on a debt or other obligation is missed; the difference between the actual quota or debt and the lesser amount available to pay such obligations.