Examples
Worked examples
- Is an instance
A project ends year 2 with 15 percent underspend due to a delayed equipment delivery; funds carry forward to year 3.
- Is an instance
An institution flags a 30 percent underspend across a portfolio of awards for management review.
Counter-examples
Looks similar, but isn't
- Not an instance
An overspend exceeding the budget is the opposite condition.
- Not an instance
An on-budget close is neither overspend nor underspend.
Editorial commentary
Underspend may arise from delays (staff vacancies, supply chain), cost savings, or scope adjustments. Modest underspends (typically below 10 percent) are routine and absorbed through carry-forward. Persistent or large underspends signal planning or execution issues and may trigger sponsor concern. Some funders reduce future-year budgets in response. Underspend is one of the two ends of the budget-execution spectrum (the other being overspend, which is generally not allowed without prior approval).
Underspend vs. encumbered-but-unexpended funds
A budget period that shows underspend on a cash or expenditure basis is not automatically “free” money available for carry-forward. Funds already tied up in open encumbrances — purchase orders placed but not yet fulfilled, subaward invoices expected but not yet received — still need to be honoured before the remainder can genuinely be treated as unspent and available for a carry-forward request. A research administrator preparing a carry-forward or budget-revision request needs the true available balance (budget minus expended minus encumbered), not just the cash-basis expenditure figure, to avoid requesting carry-forward on money that’s actually already committed.
What underspend triggers
The action an underspend triggers depends on scale and cause. A modest, well-explained underspend is typically absorbed automatically or via a routine carry-forward request into the next budget period, particularly where the sponsor’s terms and conditions pre-authorise carry-forward without separate approval. A larger or unexplained underspend more often prompts sponsor scrutiny during progress or financial reporting, may require a written justification, and — for some funders — can lead to a reduced budget in the following year on the reasoning that the award’s actual burn rate doesn’t support the originally approved level. Persistent underspend across multiple periods is also a common trigger for a sponsor requesting a formal award review before approving any further no-cost extension.
References
- US NIH Grants Policy Statement; UKRI Terms and Conditions of grants.
Related: Encumbrance · Carry-forward · No-cost extension (NCE).
Also known as
Unspent funds · Budget underspend · Unobligated balance
Machine-readable encodings
Use in your systems
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