Your flexible spending account balance doesn't roll over the way you think it does.
Every year, millions of American workers lose money they set aside because they missed a paperwork deadline, not a spending one.
Open enrollment season gets all the attention each fall.
But the real deadline lands quietly in late December or March, depending on your employer, and it governs whether you can still file claims for money you already spent.
Miss it, and that cash goes to your employer.
The rules vary wildly, which is part of the problem.
Some plans offer a grace period of two and a half months into the new year.
Some allow a carryover of a limited amount, which the IRS set at $640 for 2025.
If you switched jobs, your old FSA likely died the day you left, and you generally can't take the balance with you.
The math explains why employers aren't rushing to remind you.
A 2023 study in the Journal of the American Medical Association found that workers forfeited roughly $300 million in FSA funds in a single year across a sample of large employers.
That's real money flowing back to companies as a windfall.
Some benefits administrators even build forfeiture estimates into their contracts.
First, log into your FSA portal today and check two numbers: your remaining balance and your plan's claim filing deadline.
Second, confirm whether your plan has a grace period, a carryover, or neither, because the answer changes your entire strategy.
Third, remember that many plans let you submit claims for expenses from the prior year as long as you file before the cutoff.
And if you're staring at a balance you can't spend in time, know what actually qualifies.
Over-the-counter medications no longer need a prescription, thanks to the CARES Act.
That includes pain relievers, allergy pills, menstrual products, and even some sunscreen.
Bandages, first aid kits, contact lens solution, and most vision and dental costs count too.
A quick trip to the drugstore beats forfeiting the money.
One more thing worth checking: dependent care FSAs follow separate rules with their own deadlines, and the carryover rules don't apply to them the same way.
If you're juggling both accounts, treat them as two separate clocks.
The deeper issue is that FSAs put the burden on you to navigate a maze of plan-specific rules most people never read.
Employers control the deadlines, the rollover policies, and the reminders.
You get a username, a password, and a warning buried in a benefits PDF.
Closing thought: an FSA is essentially an interest-free loan you make to your employer unless you stay on top of it.
Set a calendar reminder, spend down what you can, and file those claims before the window shuts.
Final Thoughts
The system isn't designed to remind you, so you have to remind yourself.