What a Healthcare Flexible Spending Account Is

A healthcare flexible spending account (FSA) is a workplace benefit that lets you set aside pre-tax money to pay for medical expenses that your health insurance doesn't cover. You decide how much to contribute each year, your employer deducts that amount from your paychecks before taxes are calculated, and you can then withdraw the money to pay for may be able to access medical costs.

The main appeal is the tax savings. If you contribute $2,500 to an FSA and your combined federal, state, and payroll tax rate is 25 percent, you save roughly $625 in taxes on that money. You're paying for medical expenses you'd pay for anyway—just with pre-tax dollars instead of after-tax dollars.

FSAs are offered only through employers. You cannot open one on your own, and you cannot have one if you're self-employed or work for a company that doesn't offer the benefit. If your employer offers one, enrollment typically happens once a year during open enrollment, usually in the fall.

Key Takeaways

  • An FSA lets you contribute pre-tax money through your employer to pay for medical expenses, saving you money on taxes.
  • You must choose your contribution amount during your employer's open enrollment period, and that choice locks in for the entire year.
  • FSAs cover copays, deductibles, prescriptions, dental work, vision care, and many other medical costs—but not health insurance premiums or cosmetic procedures.
  • Money left unspent at the end of the year is forfeited; you cannot roll it over to the next year, though your employer may offer a grace period or carryover option.
  • You access FSA funds through a debit card, reimbursement request, or direct payment to providers, depending on how your plan is set up.

How Much You Can Contribute and When

The IRS sets an annual contribution limit for FSAs. For 2024, the limit is $3,200 per person per year. This limit changes occasionally, so check your employer's plan documents or benefits website for the current year's cap.

You choose your contribution amount during your employer's open enrollment period, which is usually in October or November for coverage starting January 1. Once you commit to an amount, you cannot change it during the year unless you experience a may have access to life event—marriage, divorce, birth of a child, loss of other health coverage, or a significant change in your dependent care costs. A job change or loss of employment also allows you to adjust your FSA contribution.

Your employer deducts your chosen amount in equal installments from each paycheck throughout the year. If you contribute $2,400 annually and are paid biweekly, roughly $92.31 comes out of each paycheck before federal income tax, Social Security tax, and Medicare tax are calculated.

What Medical Expenses an FSA Covers

FSAs cover a broad range of medical costs, but not everything. The IRS maintains a list of may be able to access expenses, and your employer's plan documents spell out which ones your specific FSA covers.

Covered expenses typically include copays and coinsurance for doctor visits, urgent care, and emergency room visits; deductibles you owe before insurance kicks in; prescription medications; dental work including cleanings, fillings, and orthodontia; vision care including eye exams, glasses, and contact lenses; hearing aids and related care; and over-the-counter medications like pain relievers and allergy medicine (though you may need a prescription from your doctor to use FSA funds for these).

Not covered: health insurance premiums, including premiums for your employer's plan; cosmetic procedures like teeth whitening or Botox; gym memberships or fitness equipment; vitamins and supplements (unless prescribed by a doctor for a specific medical condition); and long-term care insurance.

If you're unsure whether a specific expense qualifies, ask your FSA plan administrator before you spend the money. Many FSA providers have online tools or customer service lines that can confirm may be able to access in minutes.

The Use-It-or-Lose-It Rule and Carryover Options

The most important thing to understand about FSAs is that money you don't spend by the end of the plan year is forfeited. You cannot roll unused funds into the next year, and you cannot withdraw the money as a refund. This is called the "use-it-or-lose-it" rule, and it exists because of IRS regulations designed to prevent tax abuse.

However, your employer may offer one or both of these options to soften the impact. A grace period gives you an extra 2.5 months (usually through March 15) to spend money from the previous year's FSA. A carryover allows you to roll up to $640 (for 2024) of unused funds into the next year's FSA. Not all employers offer these, and they cannot be combined—your plan has either a grace period, a carryover, or neither.

Because of this rule, you need to estimate your medical expenses carefully when you choose your contribution amount. If you overestimate and contribute more than you'll spend, you lose the difference. If you underestimate, you pay out-of-pocket for expenses above your contribution.

How to Access and Use Your FSA Funds

The way you access FSA money depends on how your employer's plan is structured. Most plans provide one or more of these methods.

A debit card issued by your FSA provider works like a regular debit card at pharmacies, doctor's offices, and other healthcare providers. You swipe it, and the cost comes out of your FSA balance. Some cards require you to submit receipts afterward to prove the expense was may be able to access; others don't.

A reimbursement request means you pay out-of-pocket for a medical expense, then submit a claim to your FSA provider with a receipt or explanation of benefits. The provider reviews it, confirms it's may be able to access, and deposits the reimbursement into your bank account. This usually takes one to two weeks.

Some providers allow direct payment to healthcare providers. You authorize your FSA to pay a doctor's office, pharmacy, or dentist directly, and the provider bills your FSA instead of you.

Keep all receipts and documentation. Your FSA provider may ask you to prove that expenses were may be able to access, especially if you use the debit card. If you cannot provide proof, you may have to repay the FSA out-of-pocket.

FSA vs. HSA: When Each Makes Sense

FSAs and Health Savings Accounts (HSAs) are both tax-advantaged accounts for medical expenses, but they work differently and suit different situations.

An FSA is available through your employer, has a lower annual contribution limit ($3,200 for 2024), and you lose unspent money at the end of the year. You can have an FSA regardless of what type of health insurance you have. An HSA requires you to be enrolled in a high-deductible health plan (HDHP), has a higher contribution limit ($4,150 for individual coverage in 2024), and unused money rolls over indefinitely and can be invested. You own an HSA even if you change jobs.

If your employer offers both, you cannot have both at the same time. If you have an HSA, you cannot contribute to an FSA in the same year. If your employer offers only an FSA, or if you have insurance that doesn't may have access to for an HSA, an FSA is your option for tax-advantaged medical savings.

Common Mistakes and How to Avoid Them

The most common FSA mistake is overestimating how much you'll spend and losing money at year-end. To avoid this, track your actual medical expenses from the past year—copays, prescriptions, dental visits, vision care—and use that as a baseline. If your situation is changing (new baby, new medication, planned dental work), adjust upward. If you're uncertain, contribute conservatively; it's better to leave money on the table than to lose it.

Another mistake is not knowing which expenses are may be able to access. Sunscreen, pain relievers, and allergy medicine are may be able to access only if prescribed by a doctor. Toothpaste and mouthwash are not may be able to access. Gym memberships are not may be able to access even if you're using them for a medical condition. Before you spend FSA money on something you're unsure about, confirm with your plan administrator.

A third mistake is losing track of your balance. Check your FSA account online regularly to see how much you've spent and how much remains. Many providers send quarterly statements, but you shouldn't rely on those alone. Knowing your balance helps you plan your spending as the year winds down.

Frequently Asked Questions

Can I use my FSA for my spouse or children?

Yes. You can use FSA funds to pay for may be able to access medical expenses for yourself, your spouse, and any dependents you claim on your tax return, even if they're not covered by your health insurance plan. The money doesn't have to be spent on the person whose name is on the FSA.

What happens to my FSA if I leave my job?

You typically have until the end of the plan year to spend the money you've already contributed. After you leave, you cannot make new contributions. Some employers allow you to continue accessing your FSA for a limited time through COBRA, though you'll pay the full premium yourself. Check with your employer's benefits office for the specific rules.

Can I change my FSA contribution amount mid-year?

Only if you have a may have access to life event: marriage, divorce, birth or adoption of a child, death of a dependent, significant change in your spouse's benefits, loss of other health coverage, or a substantial change in your dependent care costs. A straightforward change of mind is not enough. Contact your employer's benefits office to request a change.

Do I need receipts to prove FSA expenses?

Yes, you should keep receipts and documentation. Your FSA provider may request proof that an expense was may be able to access, especially if you use the debit card. If you cannot provide it, you may have to repay the FSA yourself. Keep receipts for at least three years.

What if I don't spend all my FSA money by the important date?

The money is forfeited unless your employer offers a grace period (usually through March 15) or a carryover (up to $640 for 2024). Check your plan documents to see which option, if any, your employer provides. If neither applies, unspent money is lost.