Employers cannot refund unused FSA funds to employees — the money is forfeited under federal tax law

When you don't spend all the money in your Flexible Spending Account by the end of the plan year, that balance does not come back to you as a refund or paycheck deposit. The use-it-or-lose-it rule is built into how FSAs work at the federal level. Your employer cannot override this, and neither can you. Any balance remaining on December 31 (or your plan year end date) is gone — it stays with your employer's plan or goes to the plan administrator.

This is different from a Health Savings Account (HSA), where unused money rolls over year to year and belongs to you permanently. FSAs are designed as a tax benefit for current-year expenses only, which is why the forfeiture rule exists. The tradeoff is that FSA contributions reduce your taxable income dollar-for-dollar, making them valuable if you use them.

Key Takeaways

  • Unused FSA funds are forfeited on your plan year end date and cannot be refunded to you as cash or a paycheck deposit.
  • The use-it-or-lose-it rule is federal law, not a choice your employer makes, and applies to all traditional FSAs.
  • Your employer can offer a grace period (up to 2.5 months after year-end) or a limited carryover (up to $610 in 2024) to let you use or roll over some funds, but only if they have chosen to do so.
  • The forfeited money does not go to your employer as profit — it typically covers plan administration costs or is used to reduce premiums for all employees.
  • You can avoid forfeiture by estimating your healthcare spending carefully during open enrollment and adjusting your contribution each year.

How the use-it-or-lose-it rule actually works

The rule is enforced by the IRS as part of the tax code governing FSAs. When you contribute to an FSA, that money is excluded from your taxable income — you pay no federal income tax, Social Security tax, or Medicare tax on it. In exchange, the IRS requires that you forfeit any unused balance. This is the legal price of the tax break.

Your employer's plan administrator tracks your balance throughout the year. On your plan year end date (usually December 31, but some employers use different dates), any remaining funds are removed from your account. You cannot request a refund, and your employer cannot pay it out to you. The money is straightforward gone from your FSA.

This applies even if you had a medical emergency or unexpected expense in January of the following year. The FSA year is a closed calendar — expenses incurred after December 31 cannot be reimbursed from the prior year's balance, even if you had money sitting unused on December 30.

Grace periods and carryovers: what your employer may offer

The IRS allows employers to soften the use-it-or-lose-it rule in two ways, but only if they choose to build these options into their plan. Not all employers offer either one.

A grace period gives you extra time to spend down your FSA balance after the plan year ends. If your employer offers this, you typically have 2.5 months (some plans allow up to 2 months 15 days) to submit claims for expenses incurred during the plan year. For example, if your plan year ends December 31, a grace period might extend the important date to March 15 to turn in receipts for 2024 expenses. Any balance still remaining after the grace period expires is forfeited.

A limited carryover lets you roll a small amount of unused funds into the next plan year. The IRS cap is $610 for 2024 (this amount adjusts annually for inflation). If you have $800 left on December 31 and your employer offers a $610 carryover, you keep $610 and lose $190. The carryover amount sits in your FSA for the next year and must be spent by that year's important date, or it is forfeited again.

Check your plan documents or ask your benefits administrator which, if either, your employer offers. Many employers offer a grace period, fewer offer a carryover, and some offer both. This information is usually in your Summary of Benefits and Coverage or your plan's SPD (Summary Plan Description).

Where forfeited FSA money actually goes

Forfeited FSA funds do not become employer profit. The IRS prohibits employers from benefiting financially from forfeitures. Instead, the money is typically used to pay the administrative costs of running the FSA — the plan administrator's fees, claims processing, customer service, and compliance work. Any remainder may be used to reduce the cost of the FSA for all employees in the following year, which can lower everyone's premiums or reduce employer contributions.

Some employers donate forfeited funds to a health-related charity, though this is less common. Regardless of where it goes, you do not receive it, and your employer cannot use it as general operating revenue.

Why FSAs forfeit unused money, and how HSAs differ

The forfeiture rule exists because FSAs are a tax-advantaged benefit. The IRS wants to prevent people from using FSAs as a savings vehicle — contributing money they do not intend to spend just to avoid taxes. By requiring forfeiture, the IRS ensures FSAs are used only for actual near-term healthcare costs.

A Health Savings Account (HSA) works differently. HSA contributions also reduce your taxable income, but unused money rolls over indefinitely. You own the HSA balance, it earns interest or investment returns, and you can spend it years later. The tradeoff is that HSAs are only available if you are enrolled in a high-deductible health plan (HDHP), whereas FSAs are available to anyone with employer coverage.

If you have both an FSA and an HSA (some employers allow this), the HSA is the better place to keep long-term savings. The FSA should be used for predictable near-term expenses — copays, deductibles, prescriptions, dental work you know is coming.

Strategies to avoid losing FSA money

The best defense against forfeiture is accurate estimation during open enrollment. Review your healthcare spending from the past two years: copays, prescriptions, dental visits, vision exams, medical devices. Add up what you actually spent, not what you think you might spend. This number is your baseline.

Then add a small buffer for unexpected costs — perhaps 10 to 15 percent above your baseline. This gives you room for a surprise doctor visit or a new prescription without overfunding. For 2024, the FSA contribution limit is $3,300 per year; most people contribute far less, often $1,000 to $2,000, based on their actual spending.

Throughout the year, track your FSA claims and balance. Most plan administrators offer an online portal or mobile app where you can see your remaining balance and submitted claims. If you notice in October that you have $400 left and you know you will not spend it, you can still schedule a dental cleaning, buy over-the-counter medications, or stock up on may be able to access items before year-end.

If your employer offers a grace period, use it. Submit claims for any expenses you incurred during the plan year but have not yet claimed. Keep receipts organized and submit them before the grace period important date.

What counts as an may be able to access FSA expense

FSA funds can only be used for may have access to medical expenses under IRS rules. These include copays, coinsurance, deductibles, prescriptions, dental work, vision care, hearing aids, and certain over-the-counter medications (with a prescription). They do not include cosmetic procedures, gym memberships, or general wellness products.

The IRS maintains a detailed list of may be able to access expenses, and it changes occasionally. If you are unsure whether something qualifies, ask your plan administrator or check the IRS Publication 502. Submitting a claim for an ineligible expense can trigger an audit of your entire FSA account.

Frequently Asked Questions

Can I get my FSA money back if I leave my job mid-year?

No. When you leave your job, your FSA account closes, and any unused balance is forfeited when ready. You can continue to submit claims for expenses incurred while you were employed (usually within 60 to 90 days of termination), but only up to the balance you had when you left. You cannot recover forfeited funds as a refund or final paycheck addition.

What if I had a major medical event and spent more than I contributed?

Your FSA account goes negative, and your employer covers the shortfall. You are not required to repay it. However, if you leave your job with a negative balance, your employer typically absorbs the loss and does not pursue you for reimbursement. This is one of the few scenarios where an FSA balance works in your favor.

Can I change my FSA contribution mid-year?

Only if you have a may have access to life event: marriage, divorce, birth or adoption of a child, loss of other health coverage, or a significant change in your spouse's employment or benefits. A change in your own employment status also qualifies. Outside these events, you are locked into your contribution for the full plan year.

Does my spouse's FSA balance affect mine?

No. Each person's FSA is separate. If you and your spouse both have FSAs through your employers, you each have your own account, contribution limit, and forfeiture rule. Unused money in one account does not transfer to the other.

What happens to my FSA if I go on unpaid leave?

This depends on your employer's plan rules. Some employers allow you to pause contributions during unpaid leave; others require you to keep paying. Your FSA account typically remains active, and you can still submit claims for may be able to access expenses. Check with your benefits administrator about how unpaid leave affects your specific plan.