To get reimbursed from an FSA, you have two options: swipe the FSA debit card your plan administrator issued you at the point of sale, or pay out of pocket and file a reimbursement claim with itemized receipts. Both routes pull from the same pre-tax dollars you set aside through payroll under your employer’s cafeteria plan.1Office of the Law Revision Counsel. 26 USC 125 – Cafeteria Plans The card is faster; the claim form is what you’ll use for any provider that doesn’t accept the card, any expense you forgot to swipe for, and any transaction the card system couldn’t auto-verify.
The Two Paths to Your Money
The FSA debit card is programmed to work only at eligible merchants and for qualifying purchase categories, so most transactions clear without paperwork on your end. Keep every receipt anyway. Your plan administrator can ask you to substantiate a card purchase months after the fact, and if you can’t produce documentation, the administrator can require you to repay the amount or offset it against future claims.
The reimbursement claim is the traditional route. You pay the provider with your own money, then submit a claim to get paid back from your FSA balance. This is the path for dental offices that don’t take the card, for the pharmacy run where you used your regular debit card by accident, and for any card swipe that got declined because the system couldn’t confirm the expense was eligible.
Documentation You Need Before You File
A credit card slip or bank statement is not enough. The administrator needs an itemized receipt or invoice showing four things: the date of service, the provider’s name, a description of the service or product, and the amount charged. Miss any one of those and the claim bounces back.
If insurance covered part of the bill, you also need the Explanation of Benefits (EOB) your insurer issues after processing the claim. The EOB shows what insurance paid and what remains as your responsibility, and that remaining patient balance is what the FSA reimburses. Submitting before insurance has processed the claim is a common mistake that delays the whole thing, because the administrator needs to confirm you’re not being paid twice for the same expense.
For items that aren’t obviously medical on the receipt, you’ll need a letter of medical necessity from your treating provider. The letter must confirm the expense treats a specific medical condition and is not for general health or cosmetic purposes.2FSAFEDS. Letter of Medical Necessity Form This comes up with things like air purifiers, ergonomic equipment, massage therapy, or a treadmill prescribed for a cardiac condition. Without the letter, the administrator has no way to distinguish a medical purchase from a personal one.
How to File the Claim
Start with the claim form on your plan administrator’s website, or ask HR for a copy. Transfer the date, provider name, service description, and amount from your receipts onto the form. Most administrators offer an online portal for uploading scanned receipts, and many have a mobile app that lets you photograph the receipt and submit on the spot. Fax and mail still work if you prefer paper.
Attach the itemized receipt, the EOB where insurance was involved, and the letter of medical necessity for any dual-purpose item. Save the confirmation number the portal gives you. Processing time varies by administrator, from a day or two up to about two weeks.3FSAFEDS. How Long Will It Take to Receive Reimbursement Approved claims pay out by direct deposit, or by mailed check if you haven’t set up direct deposit. Check the portal to confirm payment posted, because rejections sometimes happen without an obvious alert.
What Actually Qualifies
The IRS defines eligible medical expenses as costs for the diagnosis, treatment, or prevention of disease, or anything that affects a structure or function of the body. Doctor visits, lab work, physicals, and diagnostic tests all qualify. So do prescription eyeglasses, contact lenses, and laser eye surgery. Dental cleanings, fillings, braces, and extractions are covered.4Internal Revenue Service. Publication 502 (2025), Medical and Dental Expenses
Expenses “merely beneficial to general health” don’t qualify. Vitamins, gym memberships, and cosmetic procedures are the usual denials. Over-the-counter medications like pain relievers, allergy pills, and cold medicine are eligible without a prescription, and menstrual care products qualify too.5Internal Revenue Service. IRS Outlines Changes to Health Care Spending Available Under CARES Act For anything in the gray zone between medical and personal, the letter of medical necessity is what unlocks reimbursement.
If Your Claim Is Denied
Denials happen, and most are fixable. The denial notice should state the reason. The usual causes are missing documentation, a duplicate submission, or an expense the administrator flagged as ineligible.
If paperwork is the problem, resubmit with the correct receipt or EOB. If the administrator determined the expense isn’t eligible and you disagree, you have a formal right to appeal. Under federal law you get at least 180 days from the date of denial to file a written appeal, someone who wasn’t involved in the original decision must review it, and you can add documents or written explanations to support your case. For post-service claims like most FSA reimbursements, the plan generally has 60 days to decide the appeal.6U.S. Department of Labor. Filing a Claim for Your Health Benefits
If the appeal is denied and you’ve exhausted the plan’s internal process, you can bring a civil action in federal or state court. Most plans require suit within 12 months after you exhaust administrative remedies. In practice, a letter of medical necessity resolves most gray-area disputes long before it gets that far.
Deadlines: How Long You Have to Get Reimbursed
Three different windows get confused constantly, and knowing which one applies to you decides whether the money is still reachable.
Run-Out Period
The run-out period is extra time to submit claims for expenses you already incurred during the plan year. It does not let you incur new expenses. Most plans set a 90-day run-out window after the plan year ends. If you had a qualifying medical bill in November but never filed the paperwork, the run-out period is what lets you file in the following February or March and still get reimbursed.
Grace Period
A grace period is different: it gives you up to two and a half extra months after the plan year ends to incur new eligible expenses and charge them against your old balance.7Internal Revenue Service. Publication 969 (2025), Health Savings Accounts and Other Tax-Favored Health Plans For a calendar-year plan, that runs through mid-March. Anything left after the grace period ends is forfeited under the use-it-or-lose-it rule.
Carryover
Instead of a grace period, your employer may offer a carryover. For the 2026 plan year, up to $680 of unused balance can roll into 2027.7Internal Revenue Service. Publication 969 (2025), Health Savings Accounts and Other Tax-Favored Health Plans Anything above $680 that you haven’t spent is forfeited. Your employer can set a lower carryover cap but not a higher one, and a plan can offer a grace period or a carryover but not both.
Getting Reimbursed After Leaving Your Job
Your health care FSA typically ends on your separation date. Eligible expenses you incurred before that date can still be submitted, but expenses incurred after you leave are not reimbursable, even if money remains in the account.8FSAFEDS. What Happens If I Separate or Retire Before the End of the Benefit Period The good news: because your full annual election is available from day one of the plan year, you get to keep every dollar of reimbursement for pre-separation expenses even if your paycheck deductions hadn’t caught up yet.9Internal Revenue Service. IRS Notice 2013-71 – Modification of Use-or-Lose Rule for Health Flexible Spending Arrangements
COBRA continuation for a health FSA is sometimes offered, but only when your remaining benefit for the year exceeds what you’d pay in COBRA premiums for the rest of that year. Run the numbers: subtract what you’ve already been reimbursed from your annual election, then compare that remaining balance to the monthly COBRA premium multiplied by the months left in the plan year. Most people find it isn’t worth electing.
If you’re planning a job change, front-load your spending. Book the dental cleaning, order new glasses, and stock up on eligible over-the-counter items before your last day. Once you separate, that money is much harder to recover.