In many instances, an unobligated balance on a grant may be carried over into the next budget period without sponsor approval. If this is permitted, it will be indicated as such in the notice of award (NOA).
NIH prior approval is required for carryover of unobligated balances on the following awards:
- All P mechanisms except P01s
- Cooperative agreements (U mechanism)
- National Research Service Awards (T and F mechanisms)
- Phase I SBIR and SSTR (R43 and R41 mechanisms)
- Clinical trials (regardless of the mechanism)
- Awards to individuals
Where carryover requires sponsor approval and/or when it exceeds 25% of the award, or when it exceeds $250,000, the request should be mentioned by the PI in the progress report. In the justification section, and in the progress report itself, the PI should mention that a formal request will be submitted under separate cover.

