FSA Contribution Limits 2026: Health, Dependent Care, and the Use-It-or-Lose-It Rule.

The Flexible Spending Account is the simplest pre-tax employee benefit in the U.S. tax code, and the most commonly misused. The 2026 IRS limits give a single household up to $8,400 of combined pre-tax room across the Health FSA and the Dependent Care FSA, plus a $680 carryover for unused Health FSA funds. Used correctly, an FSA quietly saves a working family between $1,000 and $2,500 a year. Used incorrectly, the same account becomes a forfeiture event in early January.

2026 FSA limits at a glance

The IRS publishes annual indexing for the Health FSA in Revenue Procedure releases each fall. Dependent Care limits are statutory and unchanged since 1986. Here is the picture for plan years beginning in 2026:

Estimate your tax savings

Drop your election into the calculator. It runs the federal-bracket plus FICA savings produced by routing your contribution through a Section 125 plan:

Health FSA vs. Dependent Care FSA

The two accounts share a common chassis (pre-tax payroll, §125-administered, plan year measured) but the eligible expenses do not overlap. Most households can, and probably should, fund both.

For a deeper look at the cafeteria plan that powers both accounts, see the complete Section 125 employer guide→.

The use-it-or-lose-it rule

Section 125 forbids unrestricted carryover of unused FSA funds. If you elect $3,400 and only spend $2,800 by December 31, the unused $600 is normally forfeited to the employer. The IRS allows two safety valves, a carryover or a grace period, but a plan can only adopt one of them.

Carryover, grace period, and run-out

• Carryover (Health FSA only): up to $680 of unused funds can roll into the next plan year, indefinitely. Available only if the plan document explicitly adopts it.
• Grace period: an extra 2.5 months after the plan year to incur new expenses against last year's balance. Plans must choose between carryover and grace period.
• Run-out period: the window after the plan year (typically 90 days) to submit reimbursement claims for expenses already incurred. This is universal, every plan offers it.
• Dependent Care: no carryover ever. Some plans offer a 2.5-month grace period.

The single biggest reason Americans forfeit FSA dollars is that they elect once and never look at the balance until December.

Eligible expenses (and the surprises)

The Health FSA covers virtually anything that qualifies under IRC §213(d). The list is wider than most employees realize. Eligible categories include: doctor visits, dental and vision (including LASIK), prescription drugs, fertility care, mental-health therapy, chiropractic, physical therapy, sleep apnea equipment, blood pressure monitors, prescription sunglasses, and, since the CARES Act, over-the-counter medications and menstrual care products without a prescription.

The Dependent Care FSA covers care for children under 13 and for a spouse or relative who cannot self-care. Eligible categories include daycare, after-school programs, preschool, day camp, and in-home care providers. Overnight camp and tutoring are not eligible. The expense must be incurred so the parent can work or look for work.

How Section 125 powers the FSA

An FSA is not a standalone benefit, it is a feature of a Section 125 cafeteria plan. The cafeteria plan is the legal mechanism that lets the contribution come out of payroll before federal income tax, Social Security, and Medicare are applied. Without the §125 plan document, the same money is post-tax and the FSA loses its primary economic purpose. For payroll teams that need the year-end view, see our W-2 reporting guide→.

FSA reporting on the W-2

Health FSA contributions are not separately disclosed on the W-2. They have already reduced Boxes 1, 3, and 5 inside payroll. Dependent Care FSA elections are different, they are reported in Box 10 because the employee must reconcile dependent-care benefits on Form 2441 to verify eligibility. Box 10 amounts above $5,000 trigger imputed income on the rest of the W-2. For the full Box-by-Box tour, see W-2 Box 12 codes explained→.

When and how to enroll

FSA enrollment happens during the employer's annual open enrollment window, which typically falls between October and December for plans on a calendar year. Newly hired employees can enroll within 30 days of becoming benefits-eligible. Mid-year changes are restricted to qualifying life events: marriage, divorce, birth, adoption, change in employment status, change in dependent status, or a court order affecting coverage.

The election decision is permanent for the plan year. The IRS does not allow employees to increase, decrease, or stop a Health FSA election based on changes in personal medical needs. The number elected on the form is the number deducted from every paycheck for the next twelve months. This is why a careful baseline estimate matters more than chasing the headline maximum.

How FSA claims and reimbursement actually work

There are three common reimbursement pathways. The first and easiest is a debit card tied to the FSA account. Most modern administrators issue a card that auto-substantiates at IIAS-certified merchants, meaning the swipe at a pharmacy or doctor's office is approved instantly without a paper claim. The second pathway is direct claim submission through the administrator's app or web portal. The employee uploads a receipt or Explanation of Benefits, the administrator reviews within a few business days, and the reimbursement deposits to the linked bank account. The third pathway is paper claim submission for older plans or unusual expenses, which is increasingly rare.

The Health FSA is uniform-coverage: the full annual election is available to spend from day one, even though contributions deduct gradually across the year. If an employee elects $3,000 and incurs $2,800 of eligible expenses in January, the FSA reimburses the full amount immediately. The employee continues to have the elected dollars deducted from each paycheck through year-end. The Dependent Care FSA does not work this way. DCAP reimbursements are limited to the cumulative amount actually contributed at the time of the claim.

Limited Purpose and Post-Deductible FSAs

An employee enrolled in an HSA cannot also be enrolled in a general-purpose Health FSA without losing HSA eligibility. The IRS created two narrower FSA flavors to solve this conflict. The Limited Purpose FSA covers only dental and vision expenses, which lets it coexist with an HSA because dental and vision care fall outside the HSA's medical-care scope. The Post-Deductible FSA only begins reimbursing medical expenses after the participant has met the HSA's minimum statutory deductible, which keeps the HSA's qualified-HDHP requirement intact.

For households that want both pre-tax dental and vision room and the long-term investment growth of an HSA, the Limited Purpose FSA is the standard answer. The contribution limit is the same $3,400 as the general-purpose Health FSA in 2026, and the use-it-or-lose-it rule applies in the same way.

Dependent Care FSA in real life

The Dependent Care FSA is the highest-leverage pre-tax election available to most working parents. The $5,000 household limit, when fully funded by a married couple in the 22% federal bracket with two state-tax-free states stacked correctly, returns roughly $1,950 in combined federal and FICA savings against childcare costs the family was already paying. For a single working parent in the same bracket, the savings work out to roughly $1,400 on a $5,000 election.

The catch is that DCAP is not uniform-coverage and does not allow carryover. Eligible expenses must be incurred during the plan year, and reimbursement is limited to the amount contributed to date. A parent who elects $5,000 but only spends $3,800 by year-end loses the unspent $1,200 in most plan designs. The mitigation is a careful estimate based on actual childcare invoices, not a hopeful round number.

Eligible expenses include daycare, preschool, before- and after-school programs, summer day camp, and in-home care providers. Overnight camp, tutoring, school tuition for kindergarten and above, and care provided by a parent's own dependent under 19 are not eligible. The qualifying child must be under age 13. Adult dependents who are physically or mentally incapable of self-care also qualify when the care enables the parent to work.

Employer plan design choices

Employers adopting an FSA face four design questions that shape how employees experience the benefit. First, will the plan offer carryover or a grace period or neither. Most modern plans choose carryover because it is simpler to administer and easier for employees to understand. Second, what is the run-out window for submitting claims after the plan year closes. Industry standard is 90 days, which gives employees time to gather receipts after the December rush.

Third, will the plan offer a debit card. Cards reduce administrative burden by auto-substantiating at IIAS-certified merchants, but they add a small per-employee-per-month vendor cost. The lift in employee satisfaction generally justifies the cost. Fourth, will the plan run on a calendar year or a non-calendar plan year. Calendar-year plans align with W-2 reporting and most household budgeting cycles. Non-calendar years can be helpful when the FSA is paired with a non-calendar major medical renewal, but they create complexity at year-end reporting.

Three contribution strategies