What a Flexible Spending Account Is

A Flexible Spending Account (FSA) is a workplace benefit that lets you set aside pre-tax money to pay for medical expenses your insurance doesn't cover. You decide how much to contribute each year during your employer's open enrollment period, that money comes out of your paycheck before taxes are calculated, and you use it to pay for may be able to access medical costs throughout the year. The trade-off is strict: money you don't spend by the end of the plan year is forfeited—you cannot roll it over or get it back.

FSAs are offered by employers, not the government, and participation is optional. Your employer chooses which FSA vendor to use, so the rules and how you access your money depend on your specific plan. Most FSAs come with a debit card, though some require you to pay out of pocket and submit receipts for reimbursement.

Key Takeaways

  • Money in an FSA is deducted from your paycheck before income tax and payroll taxes, which reduces your taxable income and the taxes you owe.
  • You can use FSA funds only for specific medical expenses: copays, deductibles, prescription drugs, dental work, vision care, and certain over-the-counter items like bandages and pain relievers.
  • Any money you don't spend by December 31 (or your plan's end date) is lost—there is no carryover, no refund, and no exception for unused balances.
  • You must enroll during your employer's open enrollment window, usually once a year in the fall, and your choice is locked in for the entire plan year.
  • If you leave your job, you typically have 30 to 60 days to spend remaining FSA funds before the account closes.

What Expenses You Can Pay For

FSA money covers a defined list set by the IRS. The most common may be able to access expenses are copays and coinsurance for doctor visits, deductibles, prescription medications, dental cleanings and fillings, eyeglasses and contact lenses, and hearing aids. You can also use FSA funds for certain over-the-counter items without a prescription: pain relievers like ibuprofen and acetaminophen, allergy medications, antacids, cold medicine, and first-aid supplies like bandages and gauze.

What you cannot buy with FSA money includes cosmetic procedures, vitamins (unless prescribed by a doctor for a specific condition), gym memberships, weight-loss programs, sunscreen, toothpaste, and most toiletries. Health insurance premiums, long-term care insurance, and life insurance do not may have access to either. The IRS updates the may be able to access list periodically, so check your plan documents or ask your FSA vendor if you are unsure about a specific item.

If you use your FSA debit card at a pharmacy or medical office, the vendor usually knows which items are may be able to access and will block ineligible purchases at checkout. If you pay out of pocket and submit a receipt, you may need to provide documentation proving the expense was medically necessary.

How Much You Can Contribute

The IRS sets an annual limit on FSA contributions. For 2024, the limit is $3,200 per person per year. Your employer may set a lower limit, but cannot exceed the IRS maximum. You decide your contribution amount during open enrollment and it is deducted evenly from each paycheck for the rest of the plan year.

The contribution limit resets every January 1, so if you contribute $2,000 in 2024, you start fresh in 2025 and can contribute up to $3,200 again. If you have a spouse who also has access to an FSA through their employer, you each have your own separate $3,200 limit—you cannot combine them or transfer money between accounts.

The Use-It-or-Lose-It Rule and How to Avoid It

Money left in your FSA at the end of the plan year does not roll over. If you contribute $2,500 and spend only $1,800, the remaining $700 is forfeited. This is why FSAs require careful planning: you need to estimate your medical expenses accurately, because overestimating costs you money and underestimating means you miss a tax savings opportunity.

Most employers offer a grace period of up to 2.5 months after the plan year ends (so through mid-March if your plan year ends December 31). During this grace period, you can still spend down your FSA balance on may be able to access expenses. Some employers instead offer a carryover of up to $640 into the next plan year, though not all do. Check your plan documents to see which option your employer provides.

To avoid losing money, track your spending throughout the year and adjust your contribution for the next year based on what you actually used. If you have predictable medical costs—regular prescriptions, dental work, vision care—add those up and contribute that amount. If you have a high-deductible health plan, you may have larger out-of-pocket costs and can contribute more confidently.

How to Access Your FSA Money

Most FSAs issue a debit card that you can use at pharmacies, doctor offices, and medical suppliers. When you swipe the card, the vendor checks whether the purchase is may be able to access. If it is, the transaction goes through and the amount is deducted from your FSA balance. If it is not, the card declines and you pay out of pocket.

Some FSAs do not issue a card and instead require you to pay for medical expenses yourself and then submit a claim for reimbursement. You send your receipt and an itemized bill to the FSA vendor, and they reimburse you within a few business days. This method takes longer but gives you a paper trail and proof of the expense.

A few FSAs use a hybrid model: you have a debit card for routine purchases, but for larger expenses or items the card cannot process, you submit a claim. Ask your FSA vendor which method your plan uses and whether you can request a card if one is not automatically issued.

FSA vs. HSA: When to Choose Each

An HSA (Health Savings Account) and an FSA both use pre-tax money for medical expenses, but they work very differently. An HSA is only available if you have a high-deductible health plan (HDHP), and money rolls over year to year—you never lose it. An FSA is available through most employers regardless of your health plan type, but money expires at the end of the year.

If your employer offers both, you can use an HSA but not an FSA in the same year. If you have an HDHP and expect to have medical expenses, an HSA is usually the better choice because you build savings over time and can invest the money. If you have a traditional health plan or know you will have specific medical costs this year, an FSA lets you reduce your taxes on those expenses immediately.

If your employer offers only an FSA, the use-it-or-lose-it rule means you should contribute conservatively—only what you are confident you will spend. If your employer offers only an HSA and you have an HDHP, you have a powerful savings tool that works like a retirement account for medical costs.

What Happens When You Leave Your Job

When you terminate employment, your FSA account closes. You typically have 30 to 60 days (depending on your plan) to submit claims for expenses you incurred while employed, even if you did not pay for them until after you left. After that window closes, any remaining balance is forfeited and you cannot access it.

If you had an HSA instead of an FSA, you would keep the account and the money indefinitely—it belongs to you, not your employer. This is another reason HSAs are considered more valuable for long-term savings. When you start a new job, you can enroll in that employer's FSA during open enrollment, but it is a separate account with a separate balance.

Frequently Asked Questions

Can I change my FSA contribution during the year?

No, unless you have a may have access to life event. Marriage, divorce, birth or adoption of a child, loss of health coverage, or a significant change in your spouse's benefits allow you to change your FSA contribution mid-year. A job change or salary increase does not may have access to. You must request the change within 30 to 60 days of the event, depending on your plan.

What if I submit a receipt and the FSA vendor denies it?

The vendor may deny a claim if the expense is not on the IRS may be able to access list, if you did not provide enough documentation, or if the receipt does not show what was purchased. Ask the vendor in writing why the claim was denied and what additional information they need. You can appeal the decision, and if the vendor still denies it, you can pay out of pocket and move on—there is no further appeal process.

Can I use my FSA for my spouse or children?

Yes, you can use your FSA to pay for may be able to access medical expenses for your spouse and dependents, even if they are not on your health insurance plan. The money belongs to you, so you can spend it on anyone's medical care. However, you cannot use your spouse's FSA to pay for your expenses—each account is separate.

What if I move to a different state?

Your FSA follows you. The account is tied to your employer, not your location, so moving does not affect your FSA. However, if you move and change jobs, your new employer's FSA is a separate account. You cannot transfer money from your old FSA to your new one.

Can I get my FSA money back if I don't use it?

No. The use-it-or-lose-it rule is final. Money you do not spend by the end of the plan year (plus any grace period your employer offers) is forfeited. The only exception is if your employer offers a carryover of up to $640, which rolls into the next year. Check your plan documents to see if this option is available to you.