Key Takeaways
Flexible Spending Account (FSA)
A Flexible Spending Account is a special savings account offered through an employer that lets you set aside a portion of your paycheck before taxes are taken out. You then use that money to pay for eligible medical, dental, and vision expenses. Because the funds are never taxed, you effectively pay less for the same healthcare costs.
FSAs are governed by IRS rules under Section 125 of the Internal Revenue Code. The IRS adjusts contribution limits periodically, so confirm the current annual cap with your employer or the IRS website before open enrollment.
How money goes in and comes out
When you enroll in an FSA during your employer's open enrollment period, you choose how much to contribute for the upcoming plan year. That total is divided across your paychecks and withheld before federal income tax (and often state income tax) is calculated. The result is a lower taxable income, which means you pay less in taxes on earnings you were going to spend on healthcare anyway.
One feature that surprises many families: the full annual election is available immediately on the first day of the plan year, even though your paycheck deductions have only just started. If you elect $1,200 for the year and need dental work in January, you can use all $1,200 right away. Your employer advances the funds and recoups them through your remaining paychecks.
To spend the money, most plans issue a dedicated debit card. You swipe it at a pharmacy, dentist's office, or vision center, and the eligible amount is drawn directly from your account. For expenses that require reimbursement, you submit a claim with your receipt through your plan's online portal or mobile app.
Save your receipts every time
The IRS can audit FSA claims and require documentation that an expense was eligible. Keep digital or physical copies of every receipt for FSA purchases throughout the plan year. Many FSA plan portals let you upload receipts directly, which makes record-keeping simpler.
What counts as an eligible expense
The IRS defines qualified medical expenses in Publication 502. The list is broader than many people expect. Prescription medications, copays for doctor and specialist visits, lab fees, dental fillings, orthodontia, eyeglasses, contact lenses, and hearing aids are all covered. Over-the-counter medications (pain relievers, allergy medicine, antacids) and menstrual care products became eligible after 2020.
Expenses that do not qualify include cosmetic procedures, gym memberships, vitamins taken for general health, and health insurance premiums in most standard FSA arrangements. If you are unsure whether a specific expense qualifies, your plan administrator can confirm, or you can search IRS Publication 502 directly.
Pairing your FSA with preventive care your family can access affordably is a practical strategy: preventive services often come with no cost under insurance, while your FSA handles copays, deductibles, and out-of-pocket costs that do arise.
The use-it-or-lose-it rule and how to plan around it
The biggest concern families have about FSAs is forfeiture. If you do not spend your balance by the plan deadline, most employers keep the remaining funds. The IRS does allow two employer-optional relief options: a grace period of up to 2.5 months after the plan year ends, or a carryover of a limited dollar amount (the IRS sets this cap and updates it periodically). Not all employers offer either option, so read your plan documents carefully.
The practical solution is conservative estimation. Total the medical expenses your family paid out of pocket last year: copays, prescription costs, dental bills, glasses. Use that as a baseline for your election. It is generally better to elect slightly less than you might spend than to lose a large balance at year end.
FSA vs. HSA: knowing the difference
An FSA is available to employees regardless of which health plan they have (with some exceptions), while an HSA requires enrollment in an IRS-qualified high-deductible health plan. HSA funds roll over indefinitely and are owned by the individual, not the employer. If your employer offers both account types, confirm which you are eligible for before open enrollment closes.
Families who have unpredictable or chronic health needs may find the HSA (Health Savings Account) a more flexible vehicle because unused HSA funds roll over indefinitely. However, HSAs require enrollment in a qualifying high-deductible health plan. For families without that plan type, an FSA remains a useful tool. If your household has no employer coverage at all, community health centers with sliding-scale fees may be a more relevant starting point.
Dependent care FSAs: a related but separate account
Employers may also offer a Dependent Care FSA (DCFSA), which covers eligible childcare and adult dependent care expenses rather than medical costs. The two accounts are entirely separate, with their own contribution limits and eligible expense lists. A DCFSA can help families offset the cost of daycare, after-school programs, or care for an elderly parent, all with pre-tax dollars.
Because these accounts have different rules and limits, it is worth reviewing both options during open enrollment if your employer offers them. A benefits counselor or HR representative can walk through which combination fits your household's situation.
This article is for general informational and educational purposes only and does not constitute financial, tax, or medical advice. Consult a qualified tax professional or benefits specialist for guidance specific to your situation.