Every year, millions of American workers quietly forfeit money they already earned.
Not to taxes, not to fees, but straight into the void of an unused flexible spending account.
If you have an FSA through your employer, there is a decent chance a chunk of your balance is about to evaporate.
You elect to set aside pre-tax dollars for medical or dependent care expenses.
The money comes out of your paycheck before taxes touch it, which is the whole appeal.
But unlike a 401(k), an FSA is not yours to keep indefinitely.
Many plans require you to spend the balance by December 31, or you lose it.
That "use it or lose it" rule is not a myth or a scare tactic.
It is written into the tax code, and it is enforced.
Some employers offer a grace period, typically until March 15 of the following year.
Others allow a carryover, but the IRS caps it at a modest amount, and your plan does not have to offer either option.
Log into your benefits portal and read the actual terms for your plan year.
The difference between a grace period and a carryover matters, and plenty of people confuse the two.
Then there's the dependent care side, which trips up even careful savers.
Those funds often follow stricter deadlines than medical FSAs, and you cannot simply reimburse yourself for whatever you want.
The expense has to qualify, and you generally need documentation.
So what can you actually spend it on before the clock runs out?
Prescription glasses and contacts, including a spare pair.
Over-the-counter medicines, which became eligible again without a prescription under federal law.
Bandages, first aid kits, sunscreen, menstrual products, and even some pregnancy tests.
The FSA Store and similar retailers exist precisely because people panic in December.
A bottle of aspirin that costs $6 at a grocery store can run $9 or more through a specialty portal.
Convenience has a price, and the seller knows you are racing a deadline.
Here's who benefits from the current system, and it is worth being honest about it.
Employers like FSAs because unspent balances can offset their own costs.
And the tax code gets its cut of your wages if you never claim the benefit.
The only loser in the forfeiture scenario is you.
Check your balance today, not on December 30.
Schedule that dental cleaning or eye exam now, because appointment slots fill fast in the final weeks.
If you have a carryover option, confirm the exact cap.
And if you are newly eligible for next year, consider under-electing rather than maxing out.
Funding an FSA you cannot spend is worse than not having one.
One more thing worth flagging: you cannot simply cash out an FSA or roll it into a retirement account.
No transfer, no withdrawal, no workaround.
The rules are rigid by design, and no customer service rep can override them.
The real takeaway is that an FSA rewards planning and punishes inattention in equal measure.
Set a calendar reminder for early fall, not late December, and treat the balance as money you have already committed to spending.
Because in this case, forgetting is not free.
Final Thoughts
It is a donation to a system that counts on you not paying attention.