Millions of American workers are staring down a deadline that quietly drains bank accounts every year: the flexible spending account cutoff.
Unlike a savings account, an FSA typically comes with a "use it or lose it" rule, meaning any money left unspent by the plan's deadline can vanish.
For 2024 plan years, most employers set that deadline at December 31, though some offer a grace period into mid-March or a carryover of a limited amount into the next year.
The catch is that these perks aren't guaranteed.
They depend entirely on how your employer structured the plan.
The average FSA contribution runs well into the four figures, and workers who forget to submit claims forfeit whatever remains.
The money simply disappears, and your employer's plan administrator keeps it. **Why the Deadline Trips People Up** Part of the problem is timing.
Receipts pile up, reimbursements get delayed, and suddenly it's late December with a balance still sitting there.
Dental cleanings, new glasses, prescription refills, and even some over-the-counter items can all count, but only if you file the paperwork before the clock runs out.
Another wrinkle: some expenses incurred in December can still be submitted in early January if your plan allows it.
But that window is narrow and varies by employer.
Assuming you have extra time is one of the most common and costly mistakes. **What You Can Actually Spend It On** Eligible expenses generally include copays, deductibles, prescriptions, contact lenses, hearing aids, and certain medical equipment.
Many plans also cover menstrual products, sunscreen, and some first-aid supplies thanks to recent rule changes.
Dependent care FSAs have their own separate rules and deadlines.
If you're unsure whether something qualifies, check your plan's eligible expense list or call the administrator.
A five-minute call beats losing several hundred dollars. **How to Avoid Losing the Money** Start by logging into your FSA portal and checking your exact balance and deadline.
Then book any lingering appointments, like an eye exam or dental visit, before the year ends.
Stock up on eligible supplies you'll use anyway, and submit every receipt you can find, even small ones.
If your plan offers a carryover, confirm the cap.
The IRS allows a limited rollover, but employers aren't required to offer it.
A grace period, if available, usually extends the spending window by two and a half months, which can be a lifesaver for anyone who missed December. **The Bottom Line** An FSA is a tax break, not a trap, but only if you treat the deadline like a bill that must be paid.
Workers who plan ahead get discounted medical care.
Workers who don't end up funding their employer's bottom line instead of their own.
Set a calendar reminder now, well before the cutoff.
Final Thoughts
The few minutes it takes to check your balance could be the easiest money you save all year.