When you leave your job, any unused balance in your health FSA is generally forfeited on your last day of work, and the money reverts to your employer. You can still submit claims for eligible expenses you incurred before termination during a run-out period set by your plan, and you may be able to keep the account open by electing COBRA. Dependent care FSAs follow different rules. Understanding what happens to your FSA when you leave your job comes down to three things: the type of FSA, how much you’ve already spent versus contributed, and whether continuation coverage is available and worth the cost.
What Happens to the Balance on Your Last Day
Health FSAs run under Internal Revenue Code Section 125, which sets up the use-it-or-lose-it framework: money not spent on eligible expenses during the plan year is forfeited.1Office of the Law Revision Counsel. 26 USC 125 – Cafeteria Plans Termination accelerates that clock. Your ability to incur new eligible expenses through the FSA ends on your termination date, and any remaining balance goes back to your employer.
You still keep the right to submit claims for expenses incurred before your last day. A dental cleaning on Tuesday is reimbursable even if you’re terminated on Friday. The window for filing those pre-termination claims is called a run-out period, defined by the IRS as a period immediately following the end of coverage during which you can submit claims for expenses that occurred while you were still covered.2Internal Revenue Service. IRS Notice 2013-71 – Modification of Use-or-Lose Rule for Health FSAs Federal rules don’t set a specific length. Your plan document controls, and most plans allow 60 to 90 days after termination to get your paperwork in.
Missing that run-out deadline permanently forfeits reimbursement, even for legitimate pre-termination expenses. Once you know your employment is ending, start collecting receipts and Explanations of Benefits for every medical expense from the current plan year. The run-out period only covers documentation of services already rendered. It does not let you schedule new doctor visits or fill new prescriptions and charge them to the account.
If You’ve Already Been Reimbursed More Than You Contributed
The most valuable thing to know if you’re leaving mid-year: if you’ve been reimbursed for more than you’ve paid in, your employer cannot collect the difference.
Under the uniform coverage rule, your full annual health FSA election must be available to reimburse eligible expenses from the first day of the plan year, regardless of how much has actually been withheld from your paychecks at any point.3Internal Revenue Service. Chief Counsel Advice CCA-1217103-09 If you elected $3,400 for the year and are terminated in March after contributing $850 but having already spent $2,000 on eligible expenses, you keep the full $2,000. Your employer absorbs the $1,150 shortfall with no legal recourse to recover it from you. The 2026 maximum salary reduction for a health FSA is $3,400, so the potential mismatch can be significant.4Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026
The rule is a one-way street. Flip the scenario: if you’ve contributed $2,000 by October and only spent $400, you lose the remaining $1,600 unless you elect COBRA or file claims for pre-termination expenses during the run-out period.
Keeping the Health FSA Through COBRA
COBRA is the only way to keep incurring new medical expenses through your health FSA after termination. Federal COBRA applies to employers with 20 or more employees.5U.S. Department of Labor, Employee Benefits Security Administration. FAQs on COBRA Continuation Health Coverage for Workers If your former employer is smaller, some states have their own continuation coverage laws, though duration and terms vary.
The Balance Test
Your employer isn’t automatically required to offer COBRA for a health FSA. Treasury regulations impose a specific test: the employer must offer COBRA only if the remaining benefit you could receive for the rest of the plan year exceeds the total COBRA premiums you’d owe for that same period.6GovInfo. 26 CFR 54.4980B-2 The employer looks at your annual election, subtracts what you’ve already been reimbursed, and compares the leftover to what you’d pay in premiums through the end of the plan year. If premiums would exceed the remaining benefit, the employer has no obligation to offer FSA COBRA.
The FSA COBRA option tends to disappear for employees who’ve already spent down most of their balance, and late in the plan year when few premium payments remain.
Cost and Deadlines
If COBRA is offered and you elect it, you pay up to 102% of the applicable premium, meaning the full cost plus a 2% administrative surcharge.7Office of the Law Revision Counsel. 26 USC 4980B – Failure to Satisfy Continuation Coverage Requirements For a health FSA, that premium is essentially your remaining annual election spread over the remaining months of the plan year, plus the 2% fee.
You have 60 days from the later of your qualifying event or the date you receive the COBRA election notice to decide whether to enroll.5U.S. Department of Labor, Employee Benefits Security Administration. FAQs on COBRA Continuation Health Coverage for Workers Once elected, you get 45 days to make your initial premium payment.8U.S. Department of Labor, Employee Benefits Security Administration. FAQs on COBRA Continuation Health Coverage for Employers and Advisors Missing that initial payment eliminates your continuation rights entirely. After that, monthly premiums must stay current; one missed payment ends coverage and cuts off access to the balance. FSA COBRA lasts only through the end of the current plan year, not the 18 months that apply to major medical coverage.
When It’s Worth Electing
The math is straightforward. Add up the total premiums you’d pay through the end of the plan year. Compare that to the medical expenses you realistically expect. If anticipated expenses exceed total premiums, COBRA pays for itself. If not, let the balance go.
Someone with $2,500 remaining and five months left in the plan year might pay roughly $530 per month in premiums. If they have $3,000 in planned dental work, the numbers work. If they’re generally healthy, they’d be throwing premium dollars after FSA dollars they’ll never use. And if you’ve already spent your full annual election before leaving, there’s no reason to elect COBRA for the FSA. There’s nothing left to access.
Carryover and Grace Period Balances Don’t Save You
Some plans allow up to $680 to carry over from one plan year to the next; others offer a grace period of up to two and a half months after the plan year ends to use remaining funds.9Internal Revenue Service. Publication 969 (2025) – Health Savings Accounts and Other Tax-Favored Health Plans A plan can offer one or the other, but not both.4Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026 Neither survives termination the way most people assume.
Any unused health FSA balance at termination is forfeited, including carryover amounts from a prior plan year, unless you elect COBRA.2Internal Revenue Service. IRS Notice 2013-71 – Modification of Use-or-Lose Rule for Health FSAs If you carried $500 into the current plan year from last year and get terminated in February without spending it, that $500 is gone. Carryover protects against year-end forfeiture while you’re employed. It offers no protection against mid-year termination.
Grace periods work similarly. The grace period extends the time to incur expenses after the plan year ends, but that benefit is generally tied to active participation. Once employment ends, the grace period does not extend your ability to incur new expenses. Your run-out period still lets you submit claims for expenses already incurred, but the grace period itself won’t help you spend down a remaining balance after your last day.
Dependent Care FSAs Follow Different Rules
Dependent care FSAs cover expenses like daycare and summer camp, and they operate under fundamentally different post-termination rules than health FSAs.
First, COBRA does not apply. Dependent care FSAs aren’t classified as group health plans, so federal continuation coverage requirements skip over them entirely.
Second, dependent care FSAs don’t follow the uniform coverage rule. A dependent care FSA reimburses only up to the amount you’ve actually contributed through payroll deductions so far. If you elected $5,000 for the year but have only contributed $2,000 when you leave, $2,000 is the ceiling on your reimbursements.
What you can claim depends on when the dependent care services were actually provided, not when you paid the bill. If your last day of work is October 15, you can seek reimbursement for services provided through October 15. Daycare from October 16 onward is not reimbursable, regardless of remaining balance. The run-out period applies for submitting documentation, but only for services rendered before your separation date.
Some plan documents go further and allow dependent care claims for expenses incurred through the end of the plan year, up to the balance already contributed. Whether your plan does depends entirely on how the plan document is written, so check with your plan administrator if you have a balance left after leaving.
Filing Your Final Claims
Whether you’re submitting pre-termination claims during a run-out period or filing expenses under COBRA continuation, the documentation requirements are the same. Contact your plan administrator or third-party vendor immediately upon separation to confirm your run-out deadline and get the correct claim forms.
Every claim needs documentation showing four things: the date the service was provided, the name of the provider, what service was performed, and the amount charged. For medical expenses, an Explanation of Benefits from your insurance carrier is the cleanest documentation. Itemized receipts from the provider also work. Credit card statements and canceled checks do not, because they show payment but not what the payment was for.
For run-out period claims, the plan’s deadline is final. Late submissions get denied regardless of whether the underlying expense was legitimate. If you’ve elected COBRA, keep your monthly premium payments current while filing claims. A lapsed payment terminates coverage retroactively, which can invalidate claims already submitted for the post-election period.
Gather every receipt and EOB from the current plan year before or immediately after your last day. Don’t wait for a reminder from the plan administrator, because in many cases one won’t come. The run-out clock starts the day your employment ends, and once it expires, no amount of documentation recovers those funds.