Millions of American workers are sitting on money they'll never see again unless they act in the next few weeks.
Funds parked in a healthcare flexible spending account, or FSA, typically must be spent by December 31 or they're forfeited to the employer.
With the average household contributing around $1,500 a year, that's real grocery-and-gas money slipping away.
The use-it-or-lose-it rule is the trap built into these accounts.
You fund an FSA with pre-tax dollars, which lowers your taxable income and stretches each dollar further.
But unlike a bank account, an unused balance doesn't roll over indefinitely.
Employers can offer a grace period of up to 2.5 months into the new year, or let you carry over a limited amount, but many plans offer neither.
That mismatch catches people off guard every December.
A worker who budgeted for new glasses that never got ordered, or a dental crown that kept getting postponed, suddenly faces a shrinking window.
The money is already deducted from paychecks, so it feels spent — even though it isn't.
The fix is to treat the deadline like a bill due date.
Schedule the eye exam, refill the prescriptions, and stock up on eligible over-the-counter items while you still can.
Contact lenses, first-aid supplies, bandages, thermometers, and many pain relievers qualify without a prescription under current rules.
So do sunscreen, menstrual products, and allergy medicine.
Dental and vision costs are where most people find the fastest ways to spend down a balance.
A cleaning, a pair of prescription sunglasses, or an extra box of contacts can absorb several hundred dollars in one visit.
If you've been putting off a procedure, December is the moment to call and ask about open appointments.
Dependent care FSAs work differently and deserve their own check.
Those accounts cover day care, after-school programs, and summer camp for kids under 13, and they often carry the same deadline pressure.
Parents who switched sitters or pulled a child from a program midyear may be holding a balance they can no longer easily use.
You generally need to submit claims with receipts, and some employers require documentation before reimbursing.
If you swipe the FSA debit card at checkout, keep the itemized receipt anyway.
A rejected claim in January, after the deadline, can mean the expense no longer counts.
For anyone who consistently forfeits money, the smarter move may be lowering next year's election during open enrollment.
Contributing less feels like leaving tax savings on the table, but forfeiting dollars entirely is worse.
A conservative estimate based on predictable expenses — regular prescriptions, an annual exam, a set of contacts — usually beats an optimistic guess.
One more thing worth checking: some plans reimburse expenses incurred through the end of the year even if you file the claim in early 2025.
Others require the claim itself to be submitted by December 31.
The difference matters, and it's buried in your plan documents or a quick call to HR. **Our take:** An FSA only pays off if you actually spend it, so the next few weeks are less about shopping and more about matching money you've already earned to care you already need.
If your plan has no rollover and no grace period, treat every remaining dollar as expiring tonight.
Final Thoughts
The tax break is generous, but it comes with a countdown clock most people ignore until it's too late.