Use It or Lose It: Spend Your 2026 FSA on a Gym Membership Before the Deadline
Every year, millions of dollars in FSA funds vanish on December 31 because people don’t spend them in time. If you’re sitting on a balance, a gym membership is one of the most useful ways to put that money to work — as long as it’s documented as medical care. Here’s how to do it before the clock runs out.
Why the deadline exists
A Flexible Spending Account is “use it or lose it” by law: funds you set aside pre-tax generally have to be spent within the plan year or you forfeit them. Unlike an HSA, an FSA balance doesn’t belong to you indefinitely — which is exactly why year-end planning matters.
The 2026 rules to know
- Most FSA plan years end December 31 — spend by then unless your plan says otherwise.
- Carryover: some plans let you roll a limited amount (the IRS limit was $640 for 2024 and is indexed upward) into the next year.
- Grace period: other plans give you until March 15 to spend the prior year’s funds.
- Plans offer one of these — carryover OR grace period — never both, and some offer neither. Check your specific plan.
Why a gym membership is a smart year-end spend
A membership is recurring, genuinely useful, and — with the right documentation — fully FSA-eligible. When a physician confirms that exercise treats a diagnosed condition (obesity, hypertension, type 2 diabetes, and others), the membership becomes medical care under IRC §213(d), not a lifestyle expense. That turns money you’d otherwise forfeit into a year of training.
What you need before the deadline
- A Letter of Medical Necessity naming your diagnosed condition and the prescribed exercise
- An itemized receipt or invoice for the membership
- Your plan administrator’s claim form or portal submission
How fast can you actually get the letter?
Fast enough to beat a year-end deadline. With MedSlip, you answer a few health questions, a board-certified physician reviews your case, and if appropriate you receive a signed Letter of Medical Necessity the same day — usually within hours. If a physician can’t issue one, you aren’t charged, so there’s no risk in checking before the deadline.
Don’t make these mistakes
- Assuming your balance carries over — most of it doesn’t
- Waiting until the last week, when claim processing can lag
- Submitting a membership with no Letter of Medical Necessity on file
- Throwing away the receipt or the letter after the claim is approved
New to how this works? Read what a Letter of Medical Necessity is first, then come back and put that balance to use before it disappears.
Dr. Kawalek is a board-certified internal medicine physician with 15+ years of clinical experience. He founded MedSlip to give patients fast, affordable access to the Letters of Medical Necessity that make fitness and wellness spending HSA/FSA-eligible.