Every year, millions of American workers leave money sitting in a flexible spending account they can't touch after a certain date.
Use-it-or-lose-it is not a marketing scare tactic.
For health FSAs, it's the actual rule written into federal tax law.
Here's the catch that catches people off guard: December 31 is not always the real deadline.
Many employers offer either a grace period, letting you spend funds until March 15 of the following year, or a carryover, which lets a capped amount roll into the next plan year.
You generally can't have both from the same employer, and the rules changed slightly starting in 2025 under IRS inflation adjustments.
So the person who confidently tells you "just use it by New Year's" may be wrong about your specific plan.
Your employer or plan administrator is the only source that matters, and that detail is buried in your benefits portal, not in your memory.
Health FSAs in 2025 allow you to contribute up to $3,300, with the carryover cap set at $660 for plans that use it.
Dependent care FSAs run up to $7,500 for married couples filing jointly, but those accounts have their own separate rules and often no carryover at all.
A household with both accounts can easily be juggling two different deadlines and two different sets of fine print without realizing it.
The obvious move is to spend the balance.
The smarter move is to check whether you actually need the thing you're about to buy.
FSAstore.com and similar sites exist precisely because people panic in December, and their business model depends on that panic.
Grab-and-go splurges on items you'll never open are not a strategy — they're a tax on procrastination.
If you wear prescription glasses, that's often the single biggest legitimate expense you can schedule before the deadline.
A new pair of frames, an exam, contact lenses — these typically qualify and often cost far more than most people assume.
If your dentist has been suggesting a crown, a night guard, or a cleaning you've been putting off, the FSA deadline is a reasonable nudge to schedule it.
Dependent care costs, from daycare to after-school programs to summer camp, can also be run through the account if the timing fits your plan year.
Then there's the option nobody likes to think about: forfeiting.
If you can't spend it, you can't spend it.
But before you accept that, call your plan administrator and ask specifically about your grace period and carryover status.
Some workers have discovered a leftover balance from a prior year they never knew rolled over — though don't count on it.
A few practical moves worth making this week: log into your benefits portal and screenshot your current balance and deadline.
Call the number on the back of your FSA card if anything is unclear.
And if your employer offers a "run-out" period after the plan year ends — a window to submit claims for expenses incurred before the deadline — that's different from a grace period.
You still have to have spent the money by the cutoff.
The bottom line is that FSA deadlines reward people who read their own paperwork and punish people who assume the default applies to them.
Final Thoughts
A ten-minute login now is worth more than a January scramble.