What happens if my nonprofit can spend all the money it receives from a grant in the allotted time period?
You will likely be required to return it. The requirements for the grant will be stipulated in the contract agreement signed by the receiving organization, and it is extremely likely that any money not spent in the allotted time period will be required to be returned to the agency which granted those funds. It should be noted, however, that these grants often cover more than a single calendar year or a single fiscal year; they could be up to a three-year grant. So the timeline for expenditure of the funds will be spelled out within each individual grant and will vary from one grant to the next.