You enrolled in a Flexible Spending Account during open enrollment, money is coming out of your paychecks, and now you need to actually spend it before the deadline. Knowing how to use FSA funds efficiently is the difference between saving hundreds on taxes and forfeiting money you already earned. According to the Employee Benefit Research Institute, an estimated $7.2 billion in FSA funds goes unspent each year, largely because account holders do not understand how or when to use them.
This guide covers every practical aspect of using your FSA, from swiping your debit card at the pharmacy to submitting manual reimbursement claims for expenses your card cannot cover.
Your FSA Debit Card
Most FSA administrators issue a debit card linked to your account. This card works like a regular debit card but is restricted to eligible medical purchases. You can use it at pharmacies, doctor’s offices, hospitals, dental practices, vision centers, and many online retailers that accept FSA payments. The card automatically verifies the purchase against a database of eligible medical expenses using merchant category codes and item-level data.
When you swipe your FSA card at a pharmacy for a prescription, the transaction is typically approved automatically. The same goes for copays at a doctor’s office or purchases at optical shops. However, FSA cards often get declined for items the point-of-sale system cannot verify as medical expenses, even if they are actually eligible. This does not mean the expense is ineligible — it just means you need to use the manual reimbursement process instead.
Manual Reimbursement Claims
For expenses that cannot be processed through your FSA debit card, you pay out of pocket first and then submit a claim for reimbursement. This process involves logging into your FSA administrator’s online portal or mobile app, selecting the option to file a new claim, entering the date of service, provider name, expense type, and amount, uploading a receipt or explanation of benefits (EOB) from your insurance, and submitting the claim for review.
Most administrators process reimbursement claims within two to five business days. The funds are deposited directly into your bank account or mailed as a check depending on your preference settings. Keep original receipts for at least one year after the plan year ends, as the IRS can audit FSA claims. For a full overview of FSA mechanics, see our guide on how FSAs work.
Common Ways to Use Your FSA
The broadest categories of FSA-eligible expenses cover services you likely already pay for. Medical copays and coinsurance for doctor visits, specialist appointments, and hospital services all qualify. Prescription medications are eligible at any pharmacy. Since the CARES Act of 2020, over-the-counter medications including pain relievers, allergy medicine, cold medicine, and digestive aids are also eligible without a prescription.
Dental expenses including cleanings, fillings, crowns, root canals, and orthodontic treatment qualify. Vision expenses including eye exams, prescription glasses, contact lenses, and contact lens solution are covered. Mental health services including therapy and counseling copays are eligible. Menstrual care products became eligible under the CARES Act as well.
Less Obvious Eligible Expenses
Many FSA holders miss opportunities because they do not realize certain expenses qualify. Sunscreen with SPF 15 or higher is eligible. First aid supplies including bandages, gauze, antiseptic, and medical tape qualify. Acne treatments and medicated skin care products are eligible. Pregnancy tests, ovulation kits, and fertility monitoring devices qualify. Motion sickness bands and medications are covered. Even mileage to and from medical appointments can be reimbursed at the IRS medical mileage rate.
Tracking Your Balance
Staying on top of your FSA balance throughout the year is critical to avoiding forfeiture. Most FSA administrators offer mobile apps that show your current balance, pending claims, and transaction history in real time. Set up notifications for claim approvals, denials, and balance milestones. Some apps even project your spending rate and warn you if you are on track to have unspent funds at year-end.
Review your balance quarterly at minimum. By September or October, you should have a clear picture of whether you are on track to spend your full election or need to plan additional eligible purchases or schedule medical appointments before the deadline.
Year-End Spending Strategies
If you find yourself with unspent FSA funds as the plan year winds down, several legitimate strategies can help you avoid losing money. Schedule a dental cleaning, eye exam, or physical that you have been putting off. Stock up on eligible OTC medications, first aid supplies, and prescription sunglasses or backup glasses. Purchase a year’s supply of contact lenses or solution. Get new prescription lenses if your vision has changed.
Consider higher-cost eligible items you have been postponing. Prescription sunglasses, orthotics, and certain medical devices can absorb larger balances. If your plan has a grace period or carryover provision, verify the terms with your HR department so you know exactly when your deadline falls.
What Happens When Claims Are Denied
If your FSA administrator denies a claim, you typically receive a notification explaining why. Common reasons include missing documentation, an expense that does not qualify, or a duplicate submission. You can usually appeal the decision by providing additional documentation. If you used your FSA debit card for an ineligible purchase, your administrator will request repayment or offset the amount against future eligible claims.
To avoid denied claims, check your administrator’s list of eligible expenses before purchasing. When in doubt, pay out of pocket and verify eligibility before submitting a claim. It is easier to forgo a reimbursement than to repay an improperly used FSA debit card transaction.
Frequently Asked Questions
Can I use my FSA at Amazon?
Yes. Amazon has an FSA/HSA-eligible product filter that shows items you can purchase with your FSA debit card. Eligible items are flagged on the product page and can be purchased using your FSA card as a payment method. Not all health-related products on Amazon qualify, so look for the FSA/HSA badge.
Can I use my FSA for my family members?
Yes. FSA funds can be used for qualified medical expenses incurred by you, your spouse, and your tax dependents. They do not need to be enrolled in your employer’s health plan. Keep receipts organized by family member in case your administrator requests verification.
What is the deadline to use my FSA funds?
The deadline depends on your employer’s plan. Most FSA plan years follow the calendar year with a December 31 deadline. Some employers offer a grace period of up to 2.5 months (extending to March 15) or a carryover of up to $660 into the next year. Check with your HR department for your specific plan terms.
Can I use my FSA for gym memberships or fitness programs?
Generally no. Gym memberships and fitness programs are considered general health expenses rather than medical treatments. They may qualify only if a doctor prescribes exercise as treatment for a specific diagnosed condition such as obesity, heart disease, or diabetes, and provides a letter of medical necessity.
Make Every Dollar Count
Understanding how to use FSA funds effectively starts with knowing what qualifies and staying on top of your balance throughout the year. Use your debit card for straightforward purchases like prescriptions and copays, submit manual claims for anything the card cannot cover, and plan ahead to avoid the year-end scramble. The tax savings from an FSA are only valuable if you actually spend the money on eligible expenses before your deadline. Set reminders, track your balance, and treat your FSA like the tax-saving tool it is.