An FSA is a tax-advantaged account your employer sets up so you can pay for medical expenses with pre-tax money

A Flexible Spending Account (FSA) lets you set aside money from your paycheck before taxes are taken out, then use that money to pay for medical, dental, and vision expenses. Your employer deducts the amount you choose directly from your gross pay across the year, which lowers your taxable income. You then submit receipts or use a debit card to withdraw money from the account to cover may be able to access costs.

The main advantage is tax savings. If you set aside $2,500 in an FSA and your tax rate is 25 percent, you save roughly $625 in taxes that year. The catch is the use-it-or-lose-it rule: money you don't spend by the end of the plan year (usually December 31) goes back to your employer. Some plans offer a grace period of up to 2.5 months into the next year, or let you carry over up to $610 (the amount changes yearly), but most do not.

Key Takeaways

  • You choose how much to contribute each year during open enrollment, and that money comes out of your paycheck before taxes.
  • You can use FSA funds for copays, deductibles, prescriptions, dental work, vision care, and some over-the-counter items like bandages and pain relievers.
  • Money left in your FSA at the end of the year is forfeited unless your plan offers a grace period or carryover option.
  • You access the money by submitting receipts to your plan administrator or using a debit card tied to the account.
  • FSAs are only available through employers; you cannot open one on your own.

What you can and cannot buy with FSA money

FSA funds cover most medical, dental, and vision expenses that you would pay out of pocket. may be able to access items include copays and coinsurance, deductibles, prescription medications, dental cleanings and fillings, eyeglasses and contact lenses, hearing aids, and physical therapy. Over-the-counter items like pain relievers, allergy medicine, antacids, and bandages are also covered, though you may need a prescription from your doctor for some of them depending on your plan.

Items you cannot buy include cosmetic procedures (like teeth whitening or Botox), general health products (vitamins, supplements, toothpaste, shampoo), gym memberships, and weight-loss programs. Prescription sunglasses are covered, but regular sunglasses are not. If you are unsure whether something qualifies, your plan administrator can tell you before you spend the money.

How to enroll and set your contribution amount

You enroll in an FSA during your employer's open enrollment period, which usually happens once a year in the fall for coverage starting January 1. You choose how much to contribute for the coming year—typically between $100 and $3,200 (the limit changes yearly). That amount is divided by the number of pay periods and deducted from each paycheck.

Choosing the right amount is the hardest part. Set it too high and you lose money at year-end; set it too low and you miss out on tax savings. Look at your past medical expenses, any planned procedures, and your insurance plan's copays and deductibles. If you are unsure, start with a conservative amount and increase it next year once you see how much you actually spend.

How to access and spend your FSA funds

Most FSAs issue a debit card that you can use at pharmacies, doctors' offices, and other medical providers. The card is tied to your account, and the transaction is deducted immediately. Some providers will ask you to verify that the purchase is may be able to access before the transaction goes through.

If you do not have a debit card or the provider does not accept it, you can pay out of pocket and then submit a receipt to your plan administrator for reimbursement. This usually takes one to two weeks. Keep all receipts and documentation—your plan administrator may ask for proof that an expense was may be able to access, especially for over-the-counter items.

The use-it-or-lose-it rule and how to avoid losing money

Any money left in your FSA at the end of the plan year is forfeited. This is the biggest risk of an FSA. If you contribute $2,500 and only spend $1,800, you lose $700. There is no way to get that money back, and you cannot roll it over to next year (with rare exceptions noted below).

To avoid this, estimate conservatively and spend down your balance before year-end. Many plan administrators send a notice in November or December reminding you of your remaining balance. Some plans offer a grace period—usually 2.5 months into the next year—to spend money from the prior year. A few plans allow you to carry over up to $610 to the next year. Check your plan documents to see which option applies to you.

FSA vs. HSA: which account is right for you

If your employer offers both an FSA and a Health Savings Account (HSA), you cannot contribute to both in the same year. An HSA is only available if you are enrolled in a high-deductible health plan (HDHP), and it has no use-it-or-lose-it rule—money rolls over indefinitely. An FSA has a lower contribution limit but works with any health insurance plan.

Choose an FSA if you expect to spend money on medical expenses this year and want to lower your taxes now. Choose an HSA if you have a high-deductible plan, can afford to pay medical costs out of pocket, and want to save for future healthcare expenses. If you are not sure which plan your employer offers, ask your benefits administrator.

What happens to your FSA if you leave your job

If you leave your job mid-year, you generally lose access to your FSA balance immediately, even if you have not spent it. Some employers allow you to continue using the account through the end of the plan year, but this is not required. Check your plan documents or ask your benefits team before you resign.

You may be able to continue coverage under COBRA (Consolidated Omnibus Budget Reconciliation Act), which lets you keep your FSA for a limited time after leaving your job, though you will have to pay the full premium yourself. This is rarely worth it for an FSA because of the use-it-or-lose-it rule, but it is an option if you have a large balance and know you will spend it quickly.

Frequently Asked Questions

Can I use my FSA for my spouse or children?

Yes. FSA funds can be used for may be able to access medical expenses for you, your spouse, and any dependent children, regardless of whether they are covered under your health insurance plan. You do not need to be the one receiving the care to use the money.

What if I submit a receipt and the plan says it is not may be able to access?

Your plan administrator will deny the reimbursement and the money stays in your account. You can appeal the decision if you believe the expense qualifies, or you can use the money for other may be able to access expenses. Keep documentation in case you need to dispute the denial.

Can I change my FSA contribution amount during the year?

No, unless you have a may have access to life event—marriage, divorce, birth of a child, loss of health coverage, or significant change in medical expenses. Your employer decides which events may have access to. Outside of these events, your contribution amount is locked in for the plan year.

Do I need to file anything with my taxes because of my FSA?

No. Your employer reports FSA contributions on your W-2 as pre-tax deductions, so the IRS already knows about them. You do not need to file any additional forms or report FSA spending on your tax return.

What if my FSA plan year ends before the calendar year?

Some employers use a plan year that does not match the calendar year—for example, July to June. Your use-it-or-lose-it deadline follows your plan year, not December 31. Check your plan documents to find your specific plan year dates.