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 and dependent care expenses. You decide how much to contribute each year during open enrollment, the money comes out of your paycheck before taxes are taken, and you use it to pay for may be able to access costs. The main trade-off: money you don't spend by the end of the plan year is forfeited — you lose it.

FSAs are offered by employers, not the government. Your employer sets up the plan through a third-party administrator, and you access the money through a debit card, reimbursement requests, or direct payment to providers. Unlike a Health Savings Account (HSA), you don't need a high-deductible health plan to use an FSA, and you can have an FSA even if you have traditional health insurance.

The tax savings are real but modest. If you contribute $2,500 to an FSA and your combined federal, state, and payroll tax rate is 25 percent, you save about $625 in taxes that year. The catch is that you must predict your medical spending accurately — if you overestimate and don't use the money, it's gone.

Key Takeaways

  • FSA contributions come from your paycheck before taxes, which reduces your taxable income and saves you money on taxes.
  • Money you don't spend by the end of the plan year is forfeited; there is no rollover to the next year except in limited cases.
  • FSAs cover copays, deductibles, prescriptions, dental work, vision care, and some over-the-counter items, but not health insurance premiums or cosmetic procedures.
  • You access FSA money through a debit card, by submitting receipts for reimbursement, or by paying providers directly if they accept FSA payments.
  • FSAs are employer-sponsored and available only to employees during open enrollment; you cannot open one on your own.

What You Can and Cannot Buy With FSA Money

FSA funds cover most medical expenses you would pay out of pocket: copays and coinsurance, deductibles, prescription medications, dental cleanings and fillings, vision exams and glasses, hearing aids, and certain medical equipment like crutches or blood pressure monitors. The IRS maintains a detailed list, but the general rule is that the expense must be for diagnosis, treatment, or prevention of disease or injury.

Over-the-counter items are trickier. You can use FSA money for over-the-counter pain relievers, allergy medicine, and antacids — but only if you have a prescription from a doctor, even though you're buying them without a prescription at the store. Sunscreen, toothpaste, and vitamins are not covered. Cosmetic procedures like teeth whitening or Botox are not covered, but medically necessary dental work is.

You cannot use FSA money for health insurance premiums, gym memberships, weight-loss programs, or anything that improves general health rather than treating a specific condition. If you're unsure whether an expense qualifies, ask your FSA administrator before you spend the money — they can tell you yes or no, and you'll have documentation if the IRS ever questions the deduction.

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. Your employer may set a lower limit, but cannot exceed the IRS cap. You choose your contribution amount during open enrollment, usually in November or December, and the amount is locked in for the entire plan year — you cannot change it mid-year unless you have a may have access to life event like a marriage, birth, or loss of other health coverage.

Contributions are deducted from your paycheck in equal amounts throughout the year. If you contribute $2,400, that's typically $200 per paycheck over twelve months. The money goes into your FSA account immediately, so you can use it right away even though you haven't finished paying in the full amount yet.

The plan year for most FSAs runs January through December, though some employers use a different fiscal year. At the end of the plan year, any money you haven't spent is forfeited. A few employers offer a grace period of up to 2.5 months into the next year to spend remaining funds, or a carryover of up to $610 (for 2024), but these are optional and not common — check your plan documents to see if yours offers either.

How to Use Your FSA Money

Most FSA plans issue a debit card that works like a credit card at pharmacies, doctors' offices, and other providers that accept FSA payments. When you swipe the card, the transaction is deducted from your FSA balance. Some providers, especially smaller offices, may not accept the card — in that case, you pay out of pocket and submit a receipt to your FSA administrator for reimbursement.

To get reimbursed, you typically log into your FSA account online or call the administrator, upload or mail your receipt, and request a reimbursement. The administrator verifies that the expense is FSA-may be able to access, and if it is, they send you a check or deposit the money into your bank account. This usually takes one to two weeks. Keep all receipts for at least three years in case the IRS audits your return.

Some employers let you pay providers directly through the FSA administrator's website or app, which skips the reimbursement step entirely. Ask your administrator what methods are available under your plan.

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

The biggest risk with an FSA is overestimating your medical spending and losing money at year-end. If you contribute $2,500 but only spend $1,800, the remaining $700 is gone — your employer keeps it. This is why FSAs work best for people with predictable medical costs: regular prescriptions, ongoing dental work, or frequent vision care.

To avoid waste, review your medical spending from the past two or three years. Add up copays, prescriptions, dental visits, and vision care. If you have a high-deductible health plan, factor in the deductible amount you typically hit each year. Be conservative — it's better to contribute less and not use all of it than to contribute too much and forfeit money.

In the final months of the plan year, check your FSA balance and plan how to spend remaining funds. You can stock up on may be able to access over-the-counter items, schedule dental or vision appointments, or pay for medical equipment you've been putting off. Some people use FSA money to pay for their spouse's or dependent's medical costs if they're not covered by the same plan.

If your employer offers a grace period or carryover, that gives you more flexibility — you'll have extra time or money to use without losing it. But don't assume your plan has this feature; check your plan documents or ask your HR department.

FSA vs. HSA: When to Choose Each

The main difference is may be able to access. You can only open an HSA if you're enrolled in a high-deductible health plan; you can have an FSA with any health insurance. You can have both an FSA and an HSA at the same time, but there are rules about what you can pay for with each to avoid double-dipping.

HSAs let you roll money over year to year and build a balance, while FSAs have the use-it-or-lose-it rule. HSAs are portable — if you leave your job, you keep the account and the money. FSAs are tied to your employer and end when you leave the job (though you may be able to continue coverage through COBRA).

If you have predictable medical costs and want to reduce your taxes this year, an FSA is simpler and doesn't require a specific health plan. If you want to save money long-term and build a medical fund, an HSA is better. Many people with high-deductible plans use both: they contribute to the HSA for long-term savings and use the FSA for immediate, predictable costs.

What Happens to Your FSA Money If You Leave Your Job

When you leave your job, your FSA ends. You lose access to any remaining balance in the account — it goes back to your employer or the plan. You do not get to keep the money or roll it over to a new employer's FSA.

However, you may be able to continue FSA coverage through COBRA (Consolidated Omnibus Budget Reconciliation Act) if your employer has 20 or more employees. COBRA lets you keep the same FSA for up to 18 months after you leave, but you pay the full premium yourself — both the employee and employer portions. This is usually expensive and makes sense only if you have significant medical costs planned in the near term.

If you're switching jobs and your new employer offers an FSA, you can enroll in the new plan during open enrollment or if you have a may have access to life event. The new FSA is a separate account with a separate contribution limit and plan year.

Frequently Asked Questions

Can I use my FSA debit card to buy anything at a pharmacy?

No. The card is restricted to FSA-may be able to access items. If you try to buy something that's not covered — like shampoo or a magazine — the transaction will be declined. Some pharmacies require you to separate may be able to access from ineligible items at checkout so the card only processes the may be able to access ones.

What if I don't spend all my FSA money by the end of the year?

The money is forfeited and you lose it. Some employers offer a grace period (usually 2.5 months into the next year) or a carryover of up to $610, but these are optional. Check your plan documents or ask HR whether your plan has either option.

Can I change my FSA contribution mid-year?

Only 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 spouse's benefits. A change in your medical costs alone is not enough. Contact your HR department to request a mid-year change.

Do I need receipts to use my FSA debit card?

Not at the point of purchase, but you should keep receipts. The FSA administrator may ask you to submit proof that a transaction was FSA-may be able to access, especially for items that could be personal care products. Keep receipts for at least three years.

Can I have an FSA and an HSA at the same time?

Yes, but with restrictions. If you have an HSA, you can still use an FSA for dependent care expenses. For medical expenses, you cannot use both to pay for the same cost, and there are rules about which account to use first. Ask your FSA and HSA administrators how to coordinate them.