If you have a flexible spending account through work, there's a decent chance a chunk of your own money is sitting in it right now with an expiration date attached.
Use-it-or-lose-it rules mean funds left in an FSA after the plan year can vanish — you don't get a refund, and your employer keeps the balance.
For a household that set aside $2,000 or $3,000 last open enrollment, that's not pocket change.
The deadlines aren't uniform, which is exactly what trips people up.
Many plans close their books on December 31.
Some employers offer a grace period that pushes the cutoff to March 15.
Others use a carryover, letting you roll a limited amount — $640 for 2025 plans — into the next year.
Your specific rules live in your plan documents, not in a generic article, so that's the first place to look.
The good news: FSA money is more flexible than people assume.
You can spend it on prescription copays, insulin, bandages, contact lenses and solution, eyeglasses, hearing aids, menstrual products, and many over-the-counter medicines thanks to a change that made those eligible without a prescription.
Dental work counts too, including fillings, crowns, and even some orthodontia.
One of the most overlooked moves is the online FSA store.
Major retailers and dedicated sites let you filter by "FSA eligible," and you can stock up on things you'll genuinely use over the next year — first aid supplies, thermometers, acne treatments, pregnancy tests.
Just confirm the item qualifies before checkout, because a rejected claim means you're paying out of pocket and still racing the clock.
Swipe your card at the register and the purchase generally counts on the transaction date, not the ship date.
But if you submit a manual claim, the service date usually governs.
Don't wait until the final weekend — reimbursement portals get slammed, and a receipt you can't find is a receipt you can't submit.
Snap photos of every receipt now and drop them in a folder.
If you're staring at a balance you can't realistically spend, a few options exist.
Some plans let you elect a carryover or grace period, but you can't choose it — it's baked into your employer's plan design.
If you're leaving your job, note that your FSA generally dies with your employment unless you're continuing coverage through COBRA, and even then the rules get strict.
Dependent care FSAs follow a completely different set of rules and deadlines, so don't mix them up.
The most common mistake is assuming the money will wait.
Set a calendar reminder for two weeks before your plan's cutoff, log into your account, and check the balance.
Then work backward: book the dentist, refill the prescriptions, replace the glasses, order the supplies.
Treat it like a gift card that expires, because that's essentially what it is.
The whole design of these accounts pushes you to spend on a schedule your employer sets, not one that fits your life.
That's frustrating, and it's worth telling your HR team or benefits committee that a carryover would make the plan more useful.
Final Thoughts
In the meantime, the balance is yours only if you claim it.