Health FSA Balance vs. Carryover: Separate Grace Periods from Claim Deadlines

A balance is not a promise of next-year spending

A health flexible spending arrangement (health FSA) balance is not automatically money you can carry forward. These employer plans generally follow a use-it-or-lose-it rule, with optional carryover or grace-period provisions. A carryover plan can also have a run-out period; it cannot also provide the health FSA grace period for the same transition.[1][2] Before shopping, separate the amount displayed, outstanding eligible claims, and the amount your plan actually permits to survive.

Carryover preserves a limited amount, not every dollar

Carryover makes a permitted portion of unused funds available for eligible expenses in the following plan year. An employer may allow a lower amount than the applicable federal ceiling, or no carryover. The carryover does not reduce the next year's salary-reduction contribution limit.[1][2] Obtain the limit for the plan year the money comes from, rather than copying a number from an old benefits article.

The final unused amount is determined after prior-year expenses reimbursed during the run-out period are accounted for. Consequently, an unreimbursed December bill can reduce what eventually carries forward.[2] Ask the administrator whether the portal shows a provisional figure, whether pending claims are already deducted, and what participation conditions apply next year.

A grace period extends when expenses can occur

A plan may instead offer a grace period of up to two months and 15 days after its year ends. Eligible expenses incurred within that period can use the previous year's remaining funds.[1][2] For a hypothetical calendar-year plan offering the full period, that means January 1 through March 15. It is not a universal March deadline: your plan may offer a shorter period or none.

Run-out extends filing, not the underlying spending window

A run-out period gives time to submit claims for expenses already incurred within the eligible coverage window. It does not, by itself, make a new January expense chargeable to the old year. Run-out can accompany carryover or grace-period arrangements; the plan's filing deadline must be checked separately.[2]

Suppose a calendar-year plan has no grace period and a hypothetical March 31 filing deadline. A December eligible expense submitted in February can fall within run-out. A February appointment is not a December expense just because the old balance is still visible. Eligible new-year expenses may instead draw on permitted carryover or new-year benefits, subject to plan administration.[2]

Reconcile a hypothetical $900 before spending

Assume you are reviewing a calendar-year plan before year-end. Its displayed remaining balance is $900, excluding $200 of already-incurred eligible expenses not yet submitted. Assume those claims are approved and filed on time, continued eligibility, no other claims, and a fictional plan carryover cap of $500. This is an illustration, not the current federal maximum.

• Adjusted unused funds: $900 − $200 = $700.
• Amount carried forward: the smaller of $700 and $500 = $500.
• Amount forfeited without further eligible expenses: $700 − $500 = $200.

If you also incur and successfully claim $200 of genuinely needed eligible expenses before this plan's spending deadline, the remainder becomes $500, all within the assumed cap. Do not subtract the original $200 twice if the portal already reflects it. This simplified calculation assumes no new-year claims consume carryover before the old year's reconciliation; actual claim ordering can matter.[2]

Choose the next action in this order

1. Identify the account as a health FSA and obtain the current plan documents, coverage dates, carryover terms or grace period, and filing deadline.
2. Reconcile paid, pending and unsubmitted claims by service date; ask which amounts the displayed balance includes.
3. Submit existing eligible expenses first. Keep supporting documents and check approval rather than assuming upload means payment.
4. Calculate the amount at risk after claims and any permitted carryover. If there is a grace period instead, identify necessary eligible expenses that can occur before it ends.
5. Compare needed purchases at ordinary prices. Do not turn a small forfeiture risk into unnecessary spending, or schedule inappropriate treatment just to exhaust the account.
6. Save confirmations and calendar both deadlines. Ask separately about employment changes, next-year participation and HSA eligibility before changing benefits.

FSA claims require substantiation and cannot reimburse expenses already paid by another health plan; advance reimbursement of future or projected expenses is not allowed.[1] Prepaying an appointment is therefore not a substitute for verifying when the eligible expense is incurred.

Scope, dates and limits

This guide concerns U.S. employer health FSAs, not dependent-care FSAs or a personal HSA. Sources were checked September 23, 2026. Publication 969 is the 2025 edition, with an April 30, 2026 review/update date; Notice 2013-71 is historical guidance. Their dollar figures are not presented as current limits. The examples do not establish your plan's deadlines, reimbursement entitlement or tax outcome.