There's a deadline coming that most Americans ignore until it's too late, and it doesn't send reminders.
If you set aside money in a healthcare or dependent care flexible spending account this year, that cash may evaporate on December 31 — or on your plan's grace-period cutoff.
Unlike a savings account, an FSA isn't really yours until you spend it.
Miss the window and your employer keeps the leftover.
You elected a set amount during open enrollment, and it's been quietly deducted from every paycheck.
The average healthcare FSA balance is roughly a few hundred dollars, but plenty of workers leave $50 to $500 on the table.
The money feels invisible because it never hit your checking account, so you don't notice it slipping away.
The good news: you can still rescue most of it.
Book dental cleanings, refill prescriptions, schedule an eye exam, or stock up on eligible over-the-counter items like bandages, allergy pills, and contact lens solution.
Many plans now cover menstrual products and even some sunscreen.
Dependent care accounts can pay for day care, after-school programs, or a babysitter while you work.
The catch nobody advertises: reimbursement is not automatic.
You have to submit receipts and claim forms, and some employers give you only 90 days after the plan year to file.
That means a January 15 receipt deadline for December expenses.
Your employer, technically — unspent FSA funds can offset the company's administrative costs or be shared among participating workers.
It's not a scam, but it is a quiet transfer of your money to someone else.
Meanwhile, the IRS caps healthcare FSA contributions around $3,200 for 2025, so the tax break is real but limited.
Watch for the fine print on your specific plan.
Some employers offer a grace period until March 15, while others allow a carryover of up to $640 into next year.
If you're not sure which applies to you, log into your benefits portal today — not December 30, when the phone lines are jammed.
One more thing: if you're worried about overshooting next year, you can usually change your election only after a qualifying life event like marriage, a birth, or a job change.
That's why financial planners suggest lowballing your FSA estimate and treating it as a floor, not a target.
The bottom line is uncomfortable but simple.
An FSA rewards people who plan and punishes people who don't.
Set a phone reminder for early December, spend down what you can, and file claims before the paperwork deadline.
Final Thoughts
Your future self — and your wallet — will thank you.