A flexible spending account lets you set aside pre-tax money from your paycheck to pay for medical costs out of your own pocket

A flexible spending account (FSA) is a workplace benefit that works like this: you decide how much money to set aside from your paycheck before taxes are taken out, and that money sits in an account you can use to pay for medical expenses. The money comes out of your gross pay — the amount before income tax and Social Security tax — so you pay less in taxes overall. You then use a debit card or submit receipts to pull that money out and pay for things like copays, prescriptions, dental work, or glasses.

The catch is that FSAs have strict rules. You must decide how much to set aside during your employer's open enrollment period (usually once a year), and you cannot change that amount unless you have a major life change like losing health insurance or having a baby. You also cannot carry unused money forward to the next year — money you don't spend by the end of the plan year is forfeited. This is called the "use-it-or-lose-it" rule, and it is the biggest reason people hesitate to open an FSA.

Key Takeaways

  • You contribute pre-tax money to an FSA during your employer's open enrollment, and that money can only be used for may have access to medical expenses like copays, prescriptions, dental care, and vision care.
  • The money you contribute reduces your taxable income, which means you pay less in federal income tax and Social Security tax.
  • Unused money in an FSA at the end of the plan year is forfeited — you cannot roll it over to the next year or take it as a paycheck, with rare exceptions.
  • You set your FSA contribution amount once per year and cannot change it unless you experience a may have access to life event like marriage, divorce, birth, or loss of coverage.
  • FSAs are different from Health Savings Accounts (HSAs) because FSAs do not roll over year to year and do not require a high-deductible health plan.

How much you can contribute and what the tax savings look like

The IRS sets a maximum contribution limit for FSAs each year. That limit changes annually, so you will need to check with your employer or the IRS website for the current year's cap. Most people contribute between $500 and $2,500 per year, depending on their expected medical costs and how much they can afford to set aside.

The tax savings come from not paying federal income tax, Social Security tax, or Medicare tax on the money you contribute. If you earn $50,000 per year and contribute $1,500 to an FSA, you only pay taxes on $48,500. For someone in the 22% federal tax bracket, that saves roughly $330 in federal taxes alone, plus additional savings in state and Social Security taxes. The exact savings depend on your tax bracket and your state's tax rate.

What counts as a may have access to medical expense

FSA money can pay for a wide range of medical costs, but not everything. may have access to expenses include copays and coinsurance (the portion of a bill you pay after insurance), prescription medications, dental work, vision care including glasses and contact lenses, hearing aids, and certain medical equipment like crutches or blood pressure monitors.

Things that do not count include cosmetic procedures, most over-the-counter medications (unless prescribed by a doctor), gym memberships, vitamins, and toothpaste. The IRS publishes a full list of may have access to expenses, and your FSA plan administrator can tell you whether a specific item qualifies. When in doubt, ask before you spend the money — if you use FSA funds for something that does not may have access to, you may have to pay it back and face taxes and penalties.

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

This is the feature that makes FSAs risky. Any money left in your account at the end of the plan year is forfeited. You do not get it back, and you cannot roll it over to next year. This rule exists because of tax law, not because your employer wants to keep the money — your employer actually cannot keep it either. The forfeited funds go back to the employer to offset the cost of running the FSA program.

To avoid losing money, estimate your medical costs carefully. Think about prescriptions you refill regularly, dental cleanings you schedule, vision appointments, and any procedures you know are coming. Many people underestimate their costs and leave money on the table. A safer approach is to contribute a smaller amount you are confident you will spend, rather than guessing high and losing the difference.

There is one exception: some employers offer a "grace period" that lets you spend money from the previous year's FSA during the first two and a half months of the new plan year. Not all employers offer this, so check your plan documents. A few states also allow a small carryover (usually $500 or less), but this is uncommon.

How to use your FSA money when you need it

Most FSAs issue a debit card that you can swipe at pharmacies, doctor's offices, and other medical providers. The card is linked to your FSA account, and the charge comes directly from your balance. Some providers will ask you to verify that the expense is may have access to, so keep your receipts.

If a provider does not accept the FSA debit card, you can pay out of pocket and then submit a receipt and a claim form to your FSA administrator to be reimbursed. This takes longer — usually one to two weeks — but it works for any may have access to expense. Keep all receipts for at least three years in case your FSA administrator audits your account.

FSA versus HSA: which one is right for you

An FSA and a Health Savings Account (HSA) are both tax-advantaged accounts for medical expenses, but they work differently. An FSA is offered by your employer and does not roll over year to year. An HSA is also usually offered by your employer (though you can open one on your own), and money you do not spend rolls over indefinitely — you can let it grow and use it in retirement.

To open an HSA, you must be enrolled in a high-deductible health plan (HDHP). There is no such requirement for an FSA — you can have an FSA with any health insurance plan. If your employer offers both, the choice depends on whether you have a high-deductible plan and how much medical spending you expect. If you have predictable annual costs and a regular health plan, an FSA may be simpler. If you want money to roll over and grow, an HSA is better — but you can only open one if your plan qualifies.

What happens to your FSA if you leave your job

If you leave your employer, you lose access to your FSA. Any money remaining in the account is forfeited, even if you have not reached the end of the plan year. This is a significant risk if you are thinking about changing jobs — you may want to time your departure to spend down your FSA balance first, or contribute a smaller amount at the start of the year if you think you might leave.

Some employers allow you to continue your FSA coverage under COBRA (the law that lets you keep workplace health insurance after you leave), but you have to pay the full cost yourself, including the employer's share. This is usually expensive and not worth it for an FSA, since you lose the tax advantage once you are no longer an employee.

Frequently Asked Questions

Can I use my FSA for my family members' medical expenses?

Yes, as long as they are your dependents for tax purposes. You can use FSA money for your spouse's and children's copays, prescriptions, dental work, and other may have access to expenses. You do not need to be on the same health insurance plan — the FSA just needs to cover them as dependents on your taxes.

What happens if I contribute too much and do not spend it all?

The money is forfeited at the end of the plan year. You cannot get it back, and you cannot roll it over. This is why it is important to estimate your costs carefully. If your employer offers a grace period, you have a few extra months to spend it, but most plans do not.

Can I change my FSA contribution amount during the year?

No, unless you have a may have access to life event. These include marriage, divorce, birth or adoption of a child, loss of health insurance, or a significant change in your spouse's job or benefits. If you experience one of these events, you usually have 30 to 60 days to make changes. Otherwise, you are locked in until the next open enrollment period.

Do I need receipts to use my FSA debit card?

Not always at the point of purchase, but you should keep them. Your FSA administrator may ask you to submit receipts later to verify that charges were for may have access to expenses. Keeping receipts for three years protects you if there is ever a question about your spending.

Can I use my FSA for over-the-counter medications?

Most over-the-counter medications do not may have access to unless a doctor prescribes them. Aspirin, cold medicine, and allergy pills bought without a prescription are not covered. However, some items like bandages, heating pads, and first-aid supplies do may have access to. Check with your FSA administrator if you are unsure about a specific product.