If you have a flexible spending account through work, there is a decent chance you are about to leave real money on the table.
These accounts let you set aside pre-tax dollars for medical or dependent care costs, but they come with a use-it-or-lose-it rule that trips up millions of households every year.
The exact deadline depends on your employer's plan, not the IRS calendar.
Most run on a calendar year, which means funds need to be spent by December 31.
Some plans offer a grace period that pushes the cutoff to March 15, and others allow a carryover of a limited amount into the next year.
You have to check your own plan documents, because the rules are not one-size-fits-all.
Here is the part that catches people off guard.
Even if you swipe your FSA card on December 30, the claim can still be denied if the service date falls in the new year.
What matters is when the care happened, not when you paid.
A dental cleaning on January 3 counts against next year's balance, even if you scheduled it early to "use up" this year's funds.
Prescription glasses and contacts, copays, deductibles, dental work, therapy, bandages, pregnancy tests, and even some over-the-counter medicines now count thanks to looser rules passed in recent years.
Sunscreen, menstrual products, and first-aid kits are eligible too.
Dependent care FSAs cover daycare, after-school programs, and summer camp for kids under 13.
A quick way to burn a leftover balance is to stock up on eligible items you will use anyway.
Think contact lens solution, allergy medication, thermometers, or a backup pair of glasses.
Many pharmacies and major retailers label FSA-eligible products right on the shelf or in their apps, which takes the guesswork out of it.
If you are staring down a balance you cannot spend in time, check whether your plan allows a carryover or grace period before you panic.
Some employers also let you submit receipts for expenses you already paid out of pocket earlier in the year, as long as the service date falls within the plan year.
That is free money sitting in a drawer of receipts.
The bigger lesson here is about how you set your contribution in the first place.
Estimating low and topping up later is not an option, so aim for a number you are confident you will spend.
If you routinely lose a few hundred dollars, it may be worth dialing back next year's election and keeping that cash in your regular budget instead.
The deadline is not a scam, but it is a trap for the disorganized.
Set a reminder now, log into your account, and look at the actual balance before the clock runs out.
Final Thoughts
A few minutes of checking beats watching your own money vanish.