If you set aside money in a flexible spending account this year, there's a decent chance you're about to donate part of your paycheck to your employer.
Unlike a savings account, an FSA is a use-it-or-lose-it arrangement.
Miss the deadline, and whatever's left typically goes back to your company rather than your pocket.
The good news is that many employers don't cut you off on December 31.
A large share of plans offer either a grace period, usually until March 15, or a carryover that lets you roll a limited amount into next year.
The catch is that you have to know which one your plan uses, because the two don't stack the way people assume.
If your plan offers a grace period, you can generally keep spending this year's balance through the middle of March.
If it offers a carryover instead, you can move a set dollar amount into the next plan year, and anything above that limit still vanishes.
A quick call to your benefits administrator or a look at your plan documents settles it in about five minutes.
One thing trips people up every year: the card in your wallet isn't the deadline.
If you swipe your FSA debit card in mid-March for a service you received in January, that's fine under a grace period.
But if you're using a carryover plan, the money you're spending may already belong to next year's balance.
The receipt date and the service date both matter, so keep your itemized statements.
Prescription glasses and contact lenses, dental work, therapy sessions, bandages, pregnancy tests, and a long list of over-the-counter medicines now qualify without a prescription.
If you've been putting off new glasses or a dental cleaning, this is the moment to schedule it.
A few practical moves before the clock runs out.
First, log into your FSA portal and check the exact balance and deadline date, since they vary by employer.
Second, book appointments now, because dental and vision offices fill up fast in the first quarter.
Third, if you're short on time, stock up on eligible staples like contact lens solution, first aid supplies, or eligible pain relievers.
Fourth, submit receipts even if you paid with the card, since some claims get flagged and reversed.
There's also a quieter risk worth naming.
If you're leaving your job, check whether your FSA balance survives your last day.
Usually it doesn't, and you can't take it with you.
That's a strong argument for spending it down before your final paycheck clears.
The broader lesson is that an FSA rewards people who plan and punishes people who forget.
The tax savings are real, but only if you actually use the money.
Treat the deadline like a bill you owe yourself, and put it on your calendar today rather than the week it's due.
My take: the FSA system is unnecessarily complicated, and it quietly benefits employers when workers lose track of their balances.
Until the rules change, the smartest thing you can do is treat that account as money with an expiration date.
Final Thoughts
Spend it on care you actually need, and don't let a deadline decide where your paycheck goes.