Yes, a flexible spending account is pre-tax, which means the money you put in reduces your taxable income

When you contribute to an FSA, the amount comes out of your paycheck before federal income tax, Social Security tax, and Medicare tax are calculated. That's the core difference between an FSA and a regular savings account. If you set aside $2,500 in an FSA this year, you don't pay income tax on that $2,500—you only pay tax on the rest of your salary.

Your employer handles this automatically through payroll. You choose how much to contribute during your company's open enrollment period (usually once a year), and that amount is divided across your paychecks for the year. The money sits in an account managed by a third-party administrator, and you use it to pay for may be able to access medical expenses out of pocket.

The tax savings are real but modest for most people. If you're in the 22% federal tax bracket and contribute $2,500 to an FSA, you save roughly $550 in federal taxes alone. Add state income tax and payroll taxes, and the total savings can reach $700 or more depending on where you live.

Key Takeaways

  • FSA contributions are deducted from your paycheck before taxes are calculated, lowering the income tax you owe that year.
  • You must choose your FSA contribution amount during open enrollment, and you cannot change it mid-year unless you have a may have access to life event.
  • The money is only for may be able to access medical expenses—copays, deductibles, prescriptions, dental work, and vision care, but not insurance premiums or cosmetic procedures.
  • Any money you don't spend by the end of the plan year is forfeited; there is no rollover to the next year (with rare exceptions for a grace period).
  • You need to keep receipts and submit claims to the FSA administrator to get reimbursed from your account.

What counts as an may be able to access FSA expense

The IRS maintains a list of medical expenses you can pay for with FSA money. Copays and coinsurance on doctor visits, urgent care, and emergency room visits all count. Prescription medications, over-the-counter drugs (with a prescription from your doctor), dental work, vision exams, and glasses or contacts are covered. Physical therapy, mental health counseling, and hearing aids also may have access to.

What does not count: health insurance premiums (including your employer plan premium), cosmetic procedures, vitamins without a medical condition diagnosis, gym memberships, and most wellness programs. Sunscreen, toothpaste, and deodorant are not covered unless prescribed for a specific medical condition. The line between medical and personal care is strict, and the FSA administrator will deny claims that fall on the wrong side.

If you're unsure whether something is may be able to access, ask the FSA administrator before you spend the money. Many have a phone line or online tool where you can check specific items. Getting a denial after you've already paid out of pocket is frustrating and means you lose that money.

The use-it-or-lose-it rule and what happens to unspent money

This is the biggest catch with an FSA: money you don't spend by December 31 (or by a grace period important date, usually March 15 of the following year) is forfeited. You cannot roll it over to next year, and you cannot get it back as a refund. The money goes back to your employer or the insurance company.

Because of this rule, you need to estimate carefully how much medical expense you'll have in the coming year. If you overestimate and contribute $2,500 but only spend $1,800, you lose $700. If you underestimate, you miss out on the tax savings you could have gotten. Most people contribute between $1,000 and $2,500 per year, depending on their health needs and whether they wear glasses or have regular dental work.

A few employers offer a grace period—usually 2.5 months into the next year—where you can still spend money from the previous year's FSA. Check your plan documents or ask your benefits administrator whether your employer allows this. Some also allow a small carryover (up to $610 in 2024, though this amount changes yearly), but this is less common.

How to claim reimbursement from your FSA

You don't automatically get money back when you pay a medical bill. Instead, you submit a claim to the FSA administrator with proof of the expense. Most administrators now offer a debit card that works like a credit card at pharmacies, doctor offices, and other medical providers—you swipe it and the money comes straight from your FSA account. This is the fastest route and requires no paperwork.

If you don't have a debit card or the provider doesn't accept it, you pay out of pocket and then submit a claim. You'll need to send the administrator an itemized receipt showing what you paid for, the date, and the amount. Many administrators let you upload receipts through an online portal or mobile app. Processing usually takes one to two weeks.

Keep all receipts for at least three years. The IRS can audit FSA claims, and you need documentation to prove the expense was real and may be able to access. If you can't produce a receipt, the administrator will deny the reimbursement and you lose that money.

FSA contribution limits and how they affect your taxes

The IRS sets a maximum FSA contribution each year. For 2024, the limit is $3,300 per person. Your employer may set a lower limit, but cannot allow you to contribute more than the IRS maximum. If you're married and both you and your spouse work, you each have your own $3,300 limit—you cannot combine them or transfer money between accounts.

The contribution limit changes most years, usually increasing slightly for inflation. Check your employer's benefits materials or the FSA administrator's website to confirm the current year's limit before you choose your amount.

The tax savings scale with the contribution. At the 22% federal tax bracket, every $1,000 you contribute saves you roughly $220 in federal income tax, plus an additional $153 in payroll taxes (Social Security and Medicare combined). If you're in a higher tax bracket, the savings are larger. If you're in a lower bracket, they're smaller.

When you cannot change your FSA contribution mid-year

Once you choose your FSA contribution amount during open enrollment, you're locked in for the entire plan year. You cannot increase or decrease it just because you change your mind or your circumstances shift slightly. This is different from a Health Savings Account (HSA), which you can adjust more freely.

You can only change your FSA contribution 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 health care needs. Even then, the change must be made within 30 to 60 days of the event (rules vary by employer). You'll need to provide documentation—a marriage certificate, birth certificate, or letter from your other insurance plan, for example.

If you realize mid-year that you chose the wrong amount, you're stuck. This is why estimating carefully during open enrollment matters. If you're unsure, choose a lower amount and add to it next year when you have more data about your actual spending.

FSA versus HSA: which is pre-tax and which is better

Both FSAs and HSAs use pre-tax money, so both reduce your taxable income. The main differences are flexibility and what happens to unspent money. An FSA has the use-it-or-lose-it rule; an HSA lets you roll over unused money year after year and even invest it like a retirement account. An HSA is only available if you're enrolled in a high-deductible health plan (HDHP); an FSA works with any health plan.

If you have access to both—some employers offer both an FSA and an HSA—you can contribute to both in the same year, but the combined total cannot exceed the IRS limits. Many people use an HSA as their primary savings vehicle and an FSA to cover predictable, near-term expenses like copays and glasses.

If you have an HDHP and can open an HSA, the HSA is usually the better choice because you don't lose the money. If you don't have an HDHP, an FSA is your only option for pre-tax medical savings, and it's worth using if you have regular medical expenses you know you'll incur.

Frequently Asked Questions

Can I use my FSA debit card at any store, or only at pharmacies and doctor offices?

FSA debit cards work only at pharmacies, medical providers, and other merchants coded as medical suppliers. You cannot use it at a grocery store or general retailer, even to buy over-the-counter medications. Some online pharmacies and medical supply websites accept FSA cards, but not all. If the merchant doesn't accept it, you'll need to pay out of pocket and submit a claim with a receipt.

What happens to my FSA if I leave my job?

You lose access to your FSA when you leave your employer. Any unspent money in the account is forfeited when ready. You cannot take it with you or roll it into an HSA at a new job. If you're changing jobs, try to spend down your FSA balance before your last day, or contribute less at the start of the year if you know you're leaving.

Can I claim FSA expenses on my tax return for a deduction?

No. Because FSA contributions are already pre-tax, you cannot deduct the expenses again on your tax return. The tax benefit happens when the money goes into the account, not when you spend it. If you try to deduct FSA expenses, the IRS will disallow the deduction.

Do I need to submit receipts if I use the FSA debit card?

Not always. If you use the debit card at a pharmacy or medical provider, the transaction is usually verified automatically and no receipt is needed. However, some administrators randomly request receipts to confirm the purchase was may be able to access. Keep your receipts anyway in case you're asked. For mail-order pharmacies and online purchases, you'll almost always need to submit a receipt.

Can my spouse use my FSA account?

No. An FSA is tied to one person's employment and Social Security number. Your spouse cannot access your account or use your debit card. If your spouse works and has access to an FSA through their employer, they have their own separate account with their own contribution limit.