Millions of American workers are sitting on money they'll never see again, and it has nothing to do with the stock market.
It's the balance in a flexible spending account, or FSA, an account many people fund through payroll to cover medical or dependent care costs with pre-tax dollars.
The catch: if you don't spend it by your plan's deadline, most of it vanishes.
Most FSA plans follow the calendar year, which means December 31 is the hard stop for a large share of accountholders.
Some employers offer a grace period of up to 2.5 months, pushing the real deadline into mid-March.
Others allow a carryover of a limited amount into the next year.
But those perks aren't guaranteed, and the rules depend entirely on your specific plan.
The average employee contributes somewhere in the range of $1,000 to $1,500 to a healthcare FSA annually, according to benefits industry data.
Left unspent, that's not a rounding error.
It's a car payment, a month of groceries, or a chunk of rent that simply disappears because the funds don't roll into your bank account.
So what can you actually spend it on before time runs out?
Eligible expenses typically include prescription medications, copays, contact lenses, eyeglasses, dental work, therapy sessions, bandages, thermometers, and even some over-the-counter items if you have a prescription.
Dependent care FSAs can cover daycare, after-school programs, and summer camp.
A smart move is to schedule any lingering medical appointments now.
That dental cleaning you've been putting off, the eye exam, the dermatologist visit — all of it can absorb leftover funds.
Many retailers and online FSA stores also let you stock up on eligible everyday items, from sunscreen to first-aid supplies, often with a dedicated FSA eligibility label.
One warning worth repeating: you generally can't use FSA dollars on just anything.
Vitamins, most supplements, and cosmetic procedures are typically excluded.
Spending on ineligible items can trigger a reimbursement denial or, worse, tax consequences.
Check your plan's official list before you buy.
If your deadline is looming and your balance is small, don't panic-buy random products you'll never use.
Compare your remaining balance against upcoming predictable costs — a January prescription refill, a copay, new glasses.
Spending $40 on something useful beats losing $200 to a deadline.
For anyone with a dependent care FSA, the math can be even trickier because care costs are ongoing.
If you're close to your annual limit but still paying for daycare, submit those receipts immediately.
Reimbursement requests sometimes take weeks to process, and a claim filed after the deadline may not count.
The bigger lesson here is about how these accounts are designed.
They reward people who plan and quietly penalize everyone else.
If your employer offers an FSA, it's worth setting a calendar reminder in October every year to review your balance — not December, when options run thin. **The takeaway:** An FSA is a useful tool, but only if you treat the deadline as real.
Check your balance today, confirm your plan's exact cutoff, and spend strategically rather than frantically.
Final Thoughts
Money you earned shouldn't disappear just because a calendar flipped.