Employee benefits · Published and reviewed October 22, 2026 · USFinNexus Editorial Team
FSA Use-It-or-Lose-It 2026: Carryover and Deadline Guide
Answer first: Unused health FSA money can be forfeited, but your employer may offer either a carryover or a grace period. For a 2026 plan year, the federal carryover ceiling is $680; your plan can allow less or nothing. A grace period can extend as long as two months and 15 days. Check the plan document now because a run-out period only gives extra time to file old claims—it does not extend the date for receiving care or buying eligible items.
Start with your plan—not a generic December 31 deadline
A calendar-year health FSA often uses December 31 as the last day to incur expenses, but not every plan follows the calendar year. An employer also decides whether to adopt a permitted carryover, a grace period or neither. Federal rules create options and maximums; they do not require the employer to provide the most generous option.
Open the Summary Plan Description, benefits portal or year-end administrator notice and write down four dates: the plan-year end, last date to incur an expense, claim-submission deadline, and any documentation-correction deadline. Ask human resources or the plan administrator to confirm ambiguities in writing. A debit-card transaction before year-end can still need receipts later.
Carryover, grace period and run-out period are different
| Plan feature | What it changes | 2026 federal framework | Common mistake |
|---|---|---|---|
| Carryover | Moves permitted unused health FSA money to the next plan year | Maximum $680; plan may allow less or zero | Assuming every plan automatically carries $680 |
| Grace period | Adds time to incur eligible expenses | Up to 2 months and 15 days | Confusing it with time to submit paperwork |
| Run-out period | Adds time to submit claims for expenses already incurred on time | Employer sets deadline under plan | Buying something after the expense deadline |
A health FSA generally cannot offer both a carryover and a grace period. It can have a run-out period alongside the design it chooses because run-out time concerns claim submission, not when the expense was incurred. The claim is normally tied to when the service was provided, not when the bill arrived or when you paid the credit card.
The 2026 carryover maximum is $680
IRS Revenue Procedure 2025-32 sets the 2026 health FSA employee salary-reduction limit at $3,400 and the maximum permitted carryover at $680. If your plan carries over only $500, the remaining unused amount can still be forfeited. If the plan has no carryover, citing the IRS ceiling does not create one.
A permitted carryover generally does not reduce the next plan year's salary-reduction limit. For example, a participant with a full $680 carryover can still make a new election up to the separately applicable employee limit, assuming the plan permits it and the participant remains eligible. That does not mean electing the maximum is always sensible.
Read our 2026 FSA contribution-limit guide for election basics. The limit is a tax-law ceiling, not a spending target. Estimate likely out-of-pocket costs rather than contributing extra merely to capture a tax benefit that may be lost through forfeiture.
How the grace period works
A plan can provide a grace period of up to two months and 15 days after the plan year ends. For a calendar-year plan using the full period, that commonly reaches March 15 of the following year. But a shorter employer deadline controls when valid under the plan, and a non-calendar plan produces a different date.
Eligible expenses incurred during the grace period can generally use the prior plan year's remaining balance, subject to plan procedures. Keep the date-of-service record and ask how the administrator applies funds when a new plan-year balance also exists. Do not assume the provider's invoice date controls.
The legal authority for this feature is described in IRS cafeteria-plan guidance, including Notice 2013-71. Your employer's plan still decides whether to offer it. Marketing copy from an FSA store cannot override the plan terms.
Build a 15-minute year-end FSA audit
- Check the available balance: distinguish posted, pending and denied transactions.
- Find every deadline: note the final service date, purchase date where applicable, run-out date and receipt-correction date.
- Collect unsubmitted claims: search medical, dental, vision and pharmacy records for qualifying out-of-pocket amounts.
- Request itemized proof: obtain provider name, patient, date of service, description and amount—not only a card receipt.
- Resolve debit-card requests: upload substantiation before the administrator suspends the card or seeks repayment.
- Plan remaining care realistically: do not schedule unnecessary treatment solely to spend the account.
- Save confirmations: retain claim approvals, explanations of benefits and the year-end balance statement.
If a spouse also has an FSA or HSA, coordinate before submitting. The same expense cannot be reimbursed twice or also deducted as an itemized medical expense. Coverage combinations can also affect HSA contribution eligibility.
Which expenses may be eligible?
Health FSA reimbursement generally follows qualified medical-expense concepts, but the plan and administrator require documentation. Common categories can include deductibles, copayments, eligible prescriptions, dental treatment, vision care, eyeglasses and certain over-the-counter items. The current IRS Publication 502 is a useful starting reference, while the plan's claim rules control administration.
Do not assume that every wellness, cosmetic, fitness or household product qualifies merely because it relates to health. Some expenses require a specific medical purpose or additional documentation; others remain personal expenses. When an item is uncertain, ask the administrator before buying it.
Avoid year-end stockpiling
An FSA is not a license to buy unreasonable quantities for future resale or general household use. Purchase only eligible items for the participant, spouse or qualifying dependents under the applicable rules, and keep receipts showing exactly what was purchased. Returns must be handled consistently with the plan—do not keep a cash refund for an expense the FSA reimbursed.
Use date of service, not the bill date
For many healthcare services, an expense is incurred when the care is provided. A dentist may perform treatment in December, issue a statement in January and receive payment in February; the December service date is the central fact for the plan-year claim. Conversely, prepaying in December for care that will occur next year may not make the later service a current-year expense.
Multi-stage dental or orthodontic treatment can be especially plan-specific. Ask the administrator how it treats the contract, payment schedule and service dates before relying on a large year-end payment. Keep the treatment plan and provider ledger with the claim file.
What happens when a claim is denied?
Read the denial notice rather than resubmitting the same image. The administrator may need an itemized statement, explanation of benefits, letter of medical necessity or proof that insurance has finished processing the claim. Correct the missing information before the plan's cure deadline.
If you disagree with the decision, follow the formal appeal steps and deadlines in the plan documents. Human resources may explain the process but usually cannot simply label an ineligible expense eligible. Keep a dated record of uploads, calls and written responses.
Job changes and termination require fast action
Leaving a job can shorten the practical window for incurring health FSA expenses, while a run-out period may remain for earlier eligible costs. COBRA continuation may be available in some situations, but its value depends on the remaining balance, required payments and plan terms. Ask for the termination-date rules before the final day of employment.
Remember that the full annual elected health FSA amount is often available early in the coverage period under the uniform-coverage rule, even though payroll deductions continue over the year. That feature is not a promise that unused money will be paid out at termination. Do not confuse FSA balances with an HSA, which is individually owned and generally stays with you.
FSA versus HSA: the year-end rule is not the same
An HSA generally belongs to the account holder and unused money rolls forward without an annual forfeiture rule. A health FSA is an employer plan with use-it-or-lose-it rules and optional relief features. Certain general-purpose FSA coverage can also make a person ineligible to contribute to an HSA, including during a grace period or carryover arrangement in some circumstances.
If moving to an HSA-qualified plan, ask the benefits team how the FSA design affects the start of HSA eligibility. Our 2026 HSA limits guide explains the separate contribution framework, and the HSA account guide covers longer-term use. Never apply HSA portability rules to an FSA balance.
Make a better election for the next plan year
Review the last 12 months of predictable copays, prescriptions, dental work, vision costs and recurring eligible supplies. Subtract reimbursements from other coverage and avoid counting optional spending you may postpone. Then add a modest margin only when the expenses are genuinely likely.
Enter the payroll deduction and expected healthcare spending in the budget calculator. Tax savings do not eliminate the cash-flow effect of smaller paychecks. A conservative election can be more valuable than a maximum election followed by rushed or unnecessary spending.
Frequently asked questions
How much health FSA money can carry over from 2026?
If the employer plan offers carryover, the federal maximum associated with the 2026 plan-year limit is $680. A plan may allow less or no carryover, so the plan document—not the federal maximum—determines what an employee actually keeps.
Can a health FSA have both carryover and a grace period?
Generally no. A health FSA can be designed with either a carryover or a grace period, but not both. A plan can instead have a run-out period for submitting claims, which is different from extra time to incur an expense.
How long can an FSA grace period last?
A permitted grace period can last up to two months and 15 days after the end of the plan year. An employer can choose a shorter period or none, so confirm the exact final date in the plan materials.
What is the difference between an FSA grace period and run-out period?
A grace period extends the time when you may incur eligible expenses. A run-out period only extends the time to submit documentation for expenses incurred by the applicable deadline. Submitting an old claim later does not make a new expense eligible.
What is the 2026 health FSA contribution limit?
For plan years beginning in 2026, the employee salary-reduction limit is $3,400. Employer contributions may be treated separately under plan and tax rules, and a permitted carryover does not reduce the new year salary-reduction limit.
Does this guide apply to a dependent care FSA?
No. A dependent care FSA has different eligible expenses, contribution rules and claim requirements. Do not use the health FSA carryover amount or medical-expense rules for a dependent care account.
Sources and financial disclaimer
IRS Revenue Procedure 2025-32, Publication 969, Publication 502, and Notice 2013-71 were reviewed October 22, 2026. Employer plan terms can be more restrictive than federal maximums and deadlines. This article is general benefits and tax education, not medical, tax or legal advice. Confirm dates, eligible expenses, substantiation, carryover and appeals with your plan administrator before acting.