There's a pile of money sitting in workplace accounts across the country right now, and a chunk of it is about to vanish.
If you have a flexible spending account through your employer, the calendar is quietly working against you.
Miss the deadline, and whatever you haven't spent simply goes back to your company.
Roughly 70% of large employers offer an FSA, and the average worker elects somewhere between $1,500 and $2,000 a year.
The catch baked into the design: these accounts are "use it or lose it" by law.
Unlike an HSA, which rolls over indefinitely, an FSA punishes anyone who overestimates their medical spending.
The good news is that most plans don't cut you off at midnight on December 31.
First, many employers offer a grace period, typically until March 15, letting you spend last year's balance on new expenses.
Second, others allow a carryover, which the IRS set at $640 for 2025.
Check your plan documents, because your employer picks one option, not both.
The trickier part is the "incurred" date.
Some plans require the *service* to happen by December 31, even if you pay later.
That distinction can decide whether a January dentist visit counts against last year's balance.
Confirm both dates in writing before you assume you're covered.
Prescription glasses and contacts, dental work including fillings and crowns, therapy sessions, hearing aids, acupuncture, and even some over-the-counter items if you have a prescription.
Sunscreen, bandages, menstrual products, and pregnancy tests became eligible without a prescription under the CARES Act.
A quick stop at the pharmacy can wipe out a lingering balance fast.
The trap most people fall into is timing.
Reimbursement claims often carry their own separate due date, sometimes 90 days after the plan year ends.
You can spend every dollar by the deadline and still lose it if you never file the paperwork.
Set a reminder, snap photos of receipts, and submit the moment you buy something.
If you're staring down a balance with days to go, don't panic-buy random items you'll never use.
Get the dental cleaning you've been putting off.
Stock up on eligible basics you'll actually consume.
Every dollar you recapture is money that already came out of your paycheck.
Employers benefit when you forfeit funds, which is why some HR teams mention the deadline exactly once, buried in a benefits email.
Log into your account, check the balance, and confirm your plan's specific dates today, not on the last afternoon of the year.
The takeaway is simple: an FSA is only a deal if you use it.
Workers who plan their spending in January and track receipts all year rarely lose a cent, while those who forget end up subsidizing their own benefits package.
Final Thoughts
A ten-minute check now beats waving goodbye to hundreds of dollars later.