There's a deadline buried in your employee benefits packet that quietly costs American workers hundreds of dollars a year — and almost nobody talks about it.
It's the deadline to spend the money sitting in your flexible spending account.
An FSA lets you set aside pre-tax dollars for things like doctor visits, prescriptions, glasses, and dental work.
The catch: for most plans, if you don't use the money by the end of the plan year, you forfeit it.
That's right — your own money can vanish.
The exact rules depend on your employer, so the first move is simple: log into your benefits portal or call HR and ask three questions.
Many plans follow the calendar year, which means December 31 is the cliff.
Some employers offer a grace period of up to 2.5 months to spend leftover funds.
Others allow you to roll over a limited amount — for 2025, the carryover cap is $660 — into the next year.
If you're staring down a balance you can't spend in time, don't panic-buy random stuff.
The IRS keeps a list of eligible expenses, and it's broader than most people think.
Bandages, sunscreen, contact lens solution, blood pressure monitors, and even some over-the-counter medicines all qualify — often without a prescription, thanks to a change that took effect in 2020.
You can also stack expenses you'd pay for anyway.
Schedule that dental cleaning, refill a year of contacts, replace worn prescription glasses, or stock up on eligible first-aid supplies.
If you have a dependent care FSA, the money can go toward daycare, after-school programs, or summer day camp.
One smart move: many FSA debit cards let you buy eligible items online and at drugstores instantly, so you can see your balance drop in real time instead of waiting on reimbursement paperwork.
If you're switching jobs, your FSA usually doesn't follow you.
And if you're on a Health Savings Account plan instead, the rules are completely different — HSA funds roll over forever and you keep them even after you leave.
That's a key distinction worth knowing before you choose between the two during open enrollment.
Also, watch the calendar on reimbursement claims.
Some plans require you to submit receipts by a separate filing deadline, even after the spending deadline passes.
The simplest defense is to check your balance today, not in late December when appointments are booked and shelves are picked over.
A 10-minute call to HR now could save you a few hundred dollars you'd otherwise hand back to your employer.
Our take: an FSA is only a good deal if you actually spend it.
If you chronically leave money on the table, consider contributing less next year — or ask whether a rollover option makes the account worth keeping.
Final Thoughts
A tax break you never use isn't a break at all; it's just a loan you gave your boss for free.