What an FSA Is and How the Money Works

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. Your employer deducts the amount you choose directly from your paycheck before taxes are calculated, which lowers your taxable income for the year. You then use a debit card, reimbursement forms, or direct payment to draw from that account when you have a covered expense.

The key difference from a regular savings account is the tax advantage: money in an FSA is not subject to federal income tax, Social Security tax, or Medicare tax. If you contribute $2,500 to an FSA and use it all on covered expenses, you save roughly 20 to 40 percent in taxes depending on your tax bracket — that is money back in your pocket without doing anything except choosing to use the account.

FSAs are offered through your employer's benefits plan, not through a bank or government program. You can only open one during your employer's annual enrollment period, which is usually in the fall for a plan year starting January 1. If you miss that window, you cannot open an FSA until the next enrollment period, unless you have a may have access to life event like marriage, birth, or loss of health coverage.

Key Takeaways

  • An FSA lets you contribute pre-tax money through your paycheck to pay for medical and dependent care expenses, saving you 20 to 40 percent in taxes on that money.
  • You can only open an FSA during your employer's annual enrollment period or after a may have access to life event like marriage or birth.
  • FSAs have a "use-it-or-lose-it" rule: money you do not spend by the end of the plan year is forfeited, though many employers offer a grace period or carryover of up to $610.
  • Medical FSAs cover copays, deductibles, prescriptions, and many over-the-counter items, but not health insurance premiums or cosmetic procedures.
  • Dependent care FSAs cover childcare, preschool, and adult day care, but the expenses must be so you can work or attend school.

What Medical Expenses an FSA Covers

A medical FSA covers most out-of-pocket health costs that you would pay anyway. This includes copays and coinsurance for doctor visits, deductibles, prescription medications, and dental and vision care. You can also use FSA money for items like glasses, contact lenses, hearing aids, and crutches. Over-the-counter medications such as pain relievers, allergy medicine, and antacids are covered if you have a prescription or a doctor's note, though some employers' plans cover them without a note.

Items that are not covered include health insurance premiums (what you pay for the plan itself), cosmetic procedures like teeth whitening or Botox, and general wellness products like vitamins or gym memberships. Fertility treatments, mental health counseling, and physical therapy are usually covered, but the rules vary by plan. Your employer's benefits summary or the plan administrator can tell you exactly what your specific FSA covers.

You do not have to wait for a bill to arrive to use your FSA money. You can pay out of pocket and then submit a receipt to your plan administrator for reimbursement, or you can use your FSA debit card at the pharmacy or doctor's office directly. Keep all receipts and explanation of benefits documents for at least three years in case the plan administrator asks for proof that an expense was covered.

Dependent Care FSAs and What They Cover

A dependent care FSA is separate from a medical FSA and covers childcare and adult day care expenses. The money can go toward a daycare center, nanny, preschool, or after-school program — but only if the expense is necessary so that you (and your spouse, if married) can work or attend school full-time. You cannot use dependent care FSA money for overnight camps, school tuition for kindergarten and above, or babysitting for date nights.

Adult day care is covered if the person being cared for is your dependent and you are paying for care so you can work. This includes care for an aging parent or a disabled adult family member. The annual contribution limit for dependent care FSAs is lower than for medical FSAs — currently $5,000 per household per year, though this amount can change.

Dependent care FSAs work the same way as medical ones: you contribute pre-tax money, and you either pay out of pocket and request reimbursement or use a debit card. You will need receipts and the name and tax ID of the care provider to claim reimbursement. If you receive a subsidy from your employer for childcare, that amount reduces how much you can contribute to the dependent care FSA.

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

FSAs have a strict rule: any money you do not spend by the end of the plan year is forfeited. You cannot roll it over to the next year or withdraw it as cash. This is why FSAs require careful planning — you need to estimate your expenses accurately, because overestimating means losing money and underestimating means paying out of pocket.

Many employers offer a grace period of up to 2.5 months into the next plan year, which gives you extra time to spend down your FSA balance. Some employers instead allow you to carry over up to $610 (this amount changes annually) to the next year. A few employers offer both. Check your plan documents or ask your benefits administrator which option your employer uses, because this can significantly change how much you should contribute.

To avoid losing money, track your medical and dependent care spending throughout the year and adjust your FSA contribution accordingly. If you know you will have a major expense like dental work or a surgery, time it to happen during the plan year so you can use FSA money. If you have unused funds near the end of the year, you can stock up on over-the-counter medications, contact lens solution, or other covered items before the important date.

How Much You Can Contribute and Tax Savings

For 2024, the maximum contribution to a medical FSA is $3,200 per person per year. For dependent care FSAs, the limit is $5,000 per household per year (or $2,500 if you are married and file taxes separately). These limits change annually, so check with your benefits administrator for the current year's maximum. You choose your contribution amount during enrollment, and it is deducted from your paycheck in equal installments throughout the year.

The tax savings depend on your tax bracket and how much you contribute. If you contribute $2,500 to a medical FSA and your combined federal, state, and payroll tax rate is 30 percent, you save $750 in taxes. That is money you would have paid to the government anyway, now staying in your pocket because you used an FSA instead of paying with after-tax dollars.

However, the tax savings only happen if you actually spend the money on covered expenses. If you contribute $2,500 and only spend $1,500, you lose the remaining $1,000 (unless your employer offers a grace period or carryover). This is why contributing conservatively — based on expenses you know you will have — is safer than contributing the maximum and hoping you will find ways to spend it.

How to Open an FSA and What Happens During Enrollment

To open an FSA, you must be employed by a company that offers one and you must enroll during your employer's annual benefits enrollment period. This is usually a one-to-two-week window in the fall, and your employer will notify you by email or mail with enrollment instructions. You log into your benefits portal, select the FSA option, and choose how much to contribute for the coming year.

You will need to decide between a medical FSA, a dependent care FSA, or both. If you choose a dependent care FSA, you will also need to provide information about the care provider, including their name and tax ID number. After you enroll, your contributions begin on the plan year start date (usually January 1) and are deducted from each paycheck.

If you have a may have access to life event — such as marriage, divorce, birth of a child, adoption, loss of health coverage, or a significant change in childcare costs — you may be able to open an FSA or change your contribution outside of the annual enrollment period. Contact your benefits administrator within 30 to 60 days of the event to ask whether you are may be able to access to make changes.

Common Mistakes and How to Avoid Them

The most common mistake is overestimating expenses and losing money at year-end. To avoid this, look at your actual medical and dependent care spending from the past year and contribute slightly less than that amount. If you are unsure, start with a smaller contribution and increase it next year once you know your pattern.

Another mistake is not knowing what is covered. Some people assume all over-the-counter items are covered when they are not, or they think FSA money can pay for health insurance premiums when it cannot. Read your plan's summary of coverage or call your plan administrator before you spend money on something you are unsure about.

A third mistake is missing the important date to submit reimbursement requests. Most plans require you to submit receipts within 60 to 90 days of the expense. If you wait too long, the plan may deny your reimbursement. Keep receipts organized and submit them promptly, or use your FSA debit card at the point of purchase so you do not have to track receipts yourself.

Frequently Asked Questions

Can I use my FSA money for my spouse's medical expenses?

Yes, if your spouse is covered under your health insurance plan. You can use your FSA to pay for their copays, deductibles, prescriptions, and other covered expenses. However, if your spouse has their own FSA through their employer, they should use their own account first to avoid wasting money.

What happens to my FSA if I leave my job?

You typically have 60 to 90 days after leaving your job to submit reimbursement requests for expenses you incurred while employed. After that window closes, you lose access to any remaining balance. Some employers allow you to continue the FSA under COBRA, but you would pay the full premium yourself without the tax advantage.

Can I change my FSA contribution mid-year?

Only if you have a may have access to life event such as marriage, birth, adoption, loss of coverage, or a significant change in childcare costs. You cannot change your contribution just because you want to — you must wait for the next annual enrollment period unless one of these events occurs.

Do I need receipts to use my FSA debit card?

When you use your FSA debit card at a pharmacy or doctor's office, the transaction is usually approved without a receipt. However, the plan administrator may ask you to provide proof later that the expense was covered. Keep all receipts for at least three years to be safe.

What is the difference between an FSA and an HSA?

An HSA (Health Savings Account) is similar to an FSA but has higher contribution limits, no use-it-or-lose-it rule, and the money rolls over indefinitely. However, you can only open an HSA if you are enrolled in a high-deductible health plan. An FSA is available to anyone whose employer offers one, regardless of their health plan type.