How Much Should I Put in My FSA: 2026 Limits and Tax Savings

For 2026, the ceiling on how much you can put in a healthcare FSA is $3,400, but the right number for you is the one that matches your predictable medical spending with a small cushion trimmed off the top. A workable rule: total your recurring out-of-pocket healthcare costs, add anything you know is coming, then shave 10 to 15 percent so a bad estimate doesn’t cost you money. Below that number you leave tax savings on the table; above it you risk forfeiting cash at year-end.

Build Your Number From Last Year’s Spending

Start with what you actually paid. Pull your insurance company’s explanation-of-benefits statements or the annual summary in your claims portal, which usually totals your out-of-pocket costs in one place. Focus on copays, coinsurance, deductible payments, prescriptions, and any lab or imaging fees you paid directly. That backward-looking figure is your baseline.

Then layer on what you know is coming. A crown your dentist flagged, new lenses your optometrist recommended, a procedure you’ve been putting off, physical therapy, orthodontia payments, mental health copays. Your provider’s office can usually give you a cost estimate if you ask.

Over-the-counter purchases are a bigger category than most people realize. Since the CARES Act took effect in 2020, pain relievers, allergy medication, cold and flu remedies, first-aid supplies, sunscreen, menstrual products, and sleep aids are all eligible without a prescription. If you routinely buy these, add a yearly estimate.

Once you have a total, trim it. The downside of overcontributing is real, and a common approach is to fund only your guaranteed recurring costs while leaving one-time or uncertain expenses out of the calculation. If your plan offers a carryover, you have a bit more breathing room, but not much.

2026 Contribution Limits

The IRS adjusts the healthcare FSA cap for inflation each year. For plan years beginning in 2026, the maximum employee salary reduction contribution is $3,400.1FSAFEDS. New 2026 Maximum Limit Updates – Message Board That limit applies per employee, not per household. If your spouse has a separate FSA through their own employer, each of you can contribute up to $3,400.

Employer contributions generally don’t count against the $3,400 cap. The statutory limit targets employee salary reductions. If your employer would let you take the contribution as cash instead, though, the IRS treats it as a salary reduction and it does count.

If your plan offers a carryover, the most that can roll into the next year is $680 for 2026.1FSAFEDS. New 2026 Maximum Limit Updates – Message Board Carried-over amounts do not reduce what you can elect for the new year, so anything that rolls over is genuine bonus capacity.

Dependent Care FSA

Dependent care FSAs follow different rules. Recent legislation raised the annual cap to $7,500 for single filers and married couples filing jointly for 2026, up from the $5,000 limit that had been frozen since 1986. Married individuals filing separately can contribute up to $3,750. This cap applies to the household as a whole: if both spouses have access, the combined contribution across both accounts cannot exceed $7,500.

The math is usually simpler for dependent care because bills are large and predictable. Take your weekly daycare or preschool tuition, multiply by weeks attended, add summer camp or after-school program costs, and subtract weeks off. Average center-based infant care runs roughly $14,000 a year, so for most families with one child in full-time care, the $7,500 cap is easy to justify without much risk of forfeiture. Elder care for a qualifying dependent counts too, including adult day care, as long as the care enables you and your spouse to work or look for work.

If You’re a Higher Earner

Cafeteria plans must pass IRS nondiscrimination tests that prevent them from disproportionately benefiting highly compensated employees. To stay in compliance, some employers cap contributions below the statutory maximum for that group. Your HR or benefits team can tell you whether your plan has a lower internal limit.

How Much You Actually Save in Taxes

Every dollar you put into an FSA avoids federal income tax, Social Security tax (6.2%), and Medicare tax (1.45%). State income tax savings stack on top where applicable.

A quick estimate: add your federal marginal rate to 7.65%. In the 22% federal bracket, every $1,000 contributed saves about $296. At the full $3,400 healthcare FSA maximum, that works out to roughly $1,007 in federal tax savings alone.

  • 12% federal bracket: about $197 saved per $1,000 contributed
  • 22% federal bracket: about $297 saved per $1,000 contributed
  • 24% federal bracket: about $317 saved per $1,000 contributed
  • 32% federal bracket: about $397 saved per $1,000 contributed

This math is also why forfeiture stings less than people fear. If you contribute $3,400 and forfeit $300, you still came out ahead on the $3,100 you spent tax-free. Forfeiting isn’t the goal, but the calculation is useful when you’re deciding whether to lean a little higher or lower.

Pull Ineligible Items Out of Your Estimate

The list of FSA-eligible expenses is broader than most people expect, but it has sharp edges. Copays, prescriptions, dental work, vision care, mental health visits, crutches, bandages, blood pressure monitors, and contact lens solution all qualify. Where people miscalculate is on expenses that sound medical but aren’t:

  • Cosmetic procedures such as face lifts, teeth whitening, hair transplants, and elective cosmetic surgery, unless the procedure addresses a deformity from a congenital condition, accident, or disease.2Internal Revenue Service. Publication 502, Medical and Dental Expenses
  • General wellness expenses: gym memberships, health club dues, swimming lessons, and dancing lessons are ineligible even with a doctor’s recommendation if they’re for general health rather than a diagnosed condition.2Internal Revenue Service. Publication 502, Medical and Dental Expenses
  • Vitamins and nutritional supplements, unless a physician prescribes them to treat a specific diagnosed condition.2Internal Revenue Service. Publication 502, Medical and Dental Expenses
  • Marijuana, even in states where it is legal, because it remains a controlled substance under federal law.2Internal Revenue Service. Publication 502, Medical and Dental Expenses

If your estimate includes any of these, take them out before setting your election.

The Use-It-or-Lose-It Rule

Money left in your FSA at the end of the plan year is generally forfeited. This is the single biggest reason to lean conservative. Your employer may offer one of two safety valves, but not both at the same time.

Neither is legally required. Some plans offer neither, meaning your balance resets to zero the moment the plan year ends. Check your plan documents before you elect. If your plan has no carryover and no grace period, err on the low side.

If you’re approaching year-end with a surplus, stock up on eligible items: new prescription glasses, a year’s supply of contact lenses, first-aid supplies, or scheduled dental cleanings. Most FSA administrators also accept claims for eligible items purchased online.

Your Full Election Is Available Day One

Healthcare FSAs have a feature that tilts in the employee’s favor: the uniform coverage rule. Your entire annual election is available for reimbursement starting on the first day of the plan year, even though payroll deductions happen gradually.4Internal Revenue Service. Modification of Use-or-Lose Rule For Health Flexible Spending Arrangements and Clarification Regarding 2013-2014 Non-Calendar Year Salary Reduction Elections Under 125 Cafeteria Plans Notice 2013-71

Elect $3,400 and need $2,000 of dental work in January? You can use the FSA to pay for it immediately, even after only a paycheck or two of deductions. This matters if you know a large expense is landing early in the year. You’re effectively getting an interest-free advance from your employer.

Dependent care FSAs work the opposite way. You can only be reimbursed up to the amount already deducted from your paychecks, so the balance builds as the year goes.

If You Also Want an HSA

A standard healthcare FSA disqualifies you from contributing to a Health Savings Account. The IRS treats a general-purpose FSA as other health coverage that conflicts with HSA eligibility.3Internal Revenue Service. Publication 969 (2025), Health Savings Accounts and Other Tax-Favored Health Plans

The workaround is a limited-purpose FSA, which restricts eligible expenses to dental and vision care.5FSAFEDS. Eligible Limited Expense Health Care FSA (LEX HCFSA) Expenses You keep full HSA eligibility while still getting tax-free coverage for crowns, fillings, eye exams, and prescription glasses. Not every employer offers one, so check during open enrollment.

If Your Situation Changes Mid-Year

Once you lock in your FSA contribution during open enrollment, it stays fixed for the plan year. The IRS only allows mid-year changes when you experience a qualifying life event, including:

Employers usually require documentation and impose a 30- to 60-day deadline from the event. Miss it and you’re locked in until open enrollment.

Dependent care FSAs are more flexible. A change in your childcare provider or a change in the cost of care also qualifies as a mid-year adjustment event, without one of the life events above. If your daycare raises rates in June, you can raise your election to match. This flexibility does not extend to healthcare FSAs.

If You Leave Your Job

Leaving mid-year ends your FSA coverage on your termination date, and you can only be reimbursed for expenses incurred while you were employed. Any unspent balance is generally forfeited unless you elect COBRA continuation for the FSA.

The uniform coverage rule can work in your favor here. If you elected $3,400, spent $2,800 on a dental procedure in February, and leave in April after contributing only about $1,100 through payroll, you got $2,800 in tax-free reimbursements for $1,100 in contributions. Your employer cannot require you to repay the difference. Worth keeping in mind if you’re timing a job change early in the plan year.

COBRA continuation for an FSA is only available if your account balance exceeds your total reimbursements at the time you leave. The premium equals your remaining annual contribution plus a 2% administrative fee, paid with after-tax dollars, which erases much of the tax benefit. For most people, COBRA for an FSA only makes sense with a large known expense still coming before year-end. Coverage generally extends only through the end of the plan year in which you left.

Dependent care FSAs have no COBRA option, but you can continue submitting claims for expenses incurred during the period you were contributing. Submit them before your access to the account portal expires.