If you have a flexible spending account through work, there's a decent chance you're about to forfeit money you already earned.
Most FSA plans follow a calendar year, which means the clock on your 2025 balance is running out fast.
Unlike a 401(k) or an HSA, this account comes with a use-it-or-lose-it rule that has quietly eaten billions of dollars in worker contributions over the years.
The exact deadline depends on your employer, and that's where people get tripped up.
Some plans cut off spending on December 31, while others offer a grace period into mid-March or a carryover of a limited amount into the next year.
You can't assume you know which one applies to you.
The only reliable answer is in your plan's summary documents or a quick call to your benefits administrator.
Retailers know this panic well, which is why every December brings a wave of "FSA eligible" marketing.
The problem is that a lot of what gets pushed isn't stuff you actually needed.
Blue-light glasses, massage guns, and subscription wellness apps have all been pitched as FSA-friendly, and the rules around them have shifted repeatedly.
Buying something just to zero out a balance is a good way to convert real money into clutter.
Here's the part that rarely makes the headlines: the money in your account is yours, but the rules were written to make sure not all of it gets spent.
Employers and plan administrators keep unspent funds, and estimates of how much workers forfeit each year run into the hundreds of millions of dollars industry-wide.
That's not a conspiracy, it's just the structure.
It's also a reason to treat your FSA balance like a bill you have to pay before the year ends.
There are legitimate ways to use the balance without guessing.
If you have a high-deductible plan or a health savings account, you likely already have a running list of medical costs.
Dental cleanings, eye exams, prescription refills, contact lenses, and even some over-the-counter medications qualify.
Many online FSA stores now label items clearly, and major retailers like Amazon, Walmart, and Walgreens have dedicated FSA sections that filter eligible products.
A purchase made on December 31 doesn't always count for the current plan year if it ships in January, so don't wait until the last day to order online.
If you're booking a medical appointment, get it on the calendar now rather than hoping a cancellation opens up.
And keep your receipts, because the IRS can ask for documentation long after the fact.
One more thing worth checking: your dependent care FSA, if you have one, usually follows a separate set of rules and deadlines.
Childcare and elder care expenses qualify, but the paperwork is stricter and the limits are different from a standard health FSA.
Mixing the two up is a common and expensive mistake.
The real lesson here isn't about squeezing every last dollar out of the account.
It's that a benefit designed to save you money on taxes can quietly work against you if you don't pay attention.
Set a reminder in early December, check your actual plan terms, and spend deliberately.
Final Thoughts
If you end up with a small leftover balance, that's a far better outcome than a closet full of gadgets you never wanted.