If you set aside money in a flexible spending account this year, the clock is running out faster than most people realize.
Unlike a savings account, an FSA is a use-it-or-lose-it arrangement.
Spend nothing by the deadline, and your remaining balance goes back to your employer.
For millions of American workers, that deadline lands on December 31.
Miss it, and the average forfeited balance—often several hundred dollars—simply vanishes.
The rules trip up even careful budgeters.
Most FSA accounts give you until December 31 to incur eligible expenses, not to submit receipts.
A dental cleaning on January 3 does not count for a plan that ended December 31, even if you pay the bill later.
Some employers offer a grace period of up to 2.5 extra months, or a carryover that lets you roll a limited amount into next year.
The IRS caps that carryover, and the number shifts most years—so check your specific plan rather than assuming last year's figure still applies.
What actually qualifies is broader than people think.
Prescription glasses and contacts, hearing aids, dental work, copays, and prescribed medications all count.
So do many over-the-counter items if you have a prescription, plus bandages, thermometers, and certain menstrual products.
Less obvious: sunscreen, acne treatments, and some pregnancy and fertility products.
A quick scan of your plan's eligible expense list can surface items you already buy.
The smartest move is to log into your FSA portal this week.
Most administrators show your exact balance and a running list of what you have already claimed.
From there, you can decide whether to book a year-end appointment or stock up on eligible staples.
Doctor's offices and dentists fill up fast in late December, and online FSA stores ship slowly during the holidays.
If you wait until December 29 to order contact lenses, the purchase may post to your card after the cutoff.
If you use an FSA debit card, the administrator may still ask for documentation to verify a purchase.
Unverified transactions can freeze your card and complicate the claim.
One more wrinkle: if you leave your job, you generally cannot use the remaining balance unless you elect COBRA.
That is a strong reason to spend down your account before any planned departure.
The upside of all this rigidity is the tax break.
FSA dollars go in before income and payroll taxes, so a $1,000 contribution can save a meaningful chunk depending on your bracket.
The catch is that the savings only materialize if you actually spend the money.
If you are unsure how much to set aside for next year, look at what you spent this year on copays, prescriptions, and vision care.
That number is a reasonable starting point—and a reminder to check your current balance before it resets to zero. **Our take:** An FSA rewards people who plan and punishes people who forget.
Final Thoughts
Treat the December deadline like a bill that must be paid, because the penalty for ignoring it is losing money you already earned.