A Health Care Flexible Spending Account (HCFSA) is an employer-sponsored account that lets you set aside pre-tax money from your paycheck to pay for medical, dental, and vision expenses. For plan years starting in 2026, you can contribute up to $3,400, and every dollar avoids federal income tax, most state income taxes, and the 7.65% FICA tax that funds Social Security and Medicare.1Internal Revenue Service. Revenue Procedure 2025-32 The tradeoff is a strict use-it-or-lose-it rule: money you don’t spend by the deadline is generally forfeited to your employer.
How the Tax Savings Work
When you elect a contribution amount, your employer deducts that money from your paycheck before calculating any taxes. You skip federal income tax, state income tax in most states, and FICA.2FSAFEDS. FAQs – Why Should I Use an FSA for Health Care Expenses Rather Than Deducting the Expenses on My Income Tax Return Withdrawals are also tax-free when used for qualified medical expenses, so the money is never taxed at any point.
How much you actually save depends on your bracket. Someone in the 22% federal bracket who contributes the full $3,400 would save roughly $1,010 in combined federal and FICA taxes, before any state savings. That FICA piece is what separates the HCFSA from the itemized medical deduction on your tax return, which only touches income tax and only applies to costs above 7.5% of your adjusted gross income.
2026 Contribution Limit
The IRS adjusts the HCFSA cap each year for inflation. For plan years beginning in 2026, the maximum employee contribution is $3,400.1Internal Revenue Service. Revenue Procedure 2025-32 The limit applies per employer, not per household. If you and your spouse each have access to an HCFSA at separate jobs, each of you can contribute up to $3,400, for a household total of $6,800. That stacking is specific to health care FSAs; dependent care FSAs use a single household cap.
Your employer can also set a lower limit than the IRS ceiling. Check your plan documents if the full $3,400 doesn’t appear during enrollment.
Who Can Enroll
Only employees whose employer sponsors a Section 125 cafeteria plan can participate.3Office of the Law Revision Counsel. 26 US Code 125 – Cafeteria Plans The cafeteria plan is the legal wrapper that makes the pre-tax treatment work. Self-employed individuals, including sole proprietors, partners, and S-corporation owners holding more than 2% of the company, are not eligible because they don’t qualify as employees under these rules.
Enrollment usually happens during your employer’s annual open enrollment. You actively elect a specific dollar amount for the coming plan year; there’s no default. Once the plan year begins, you generally cannot change the election unless you have a qualifying life event, such as marriage, divorce, birth or adoption of a child, or a change in your or your spouse’s employment status that affects benefits eligibility.4FSAFEDS. FAQs – What Is a Qualifying Life Event After a qualifying event, you typically have 30 to 60 days to request a change, depending on the plan.
The account is technically owned by your employer, not by you. That ownership drives most of the rules that follow.
What You Can Pay For
HCFSA funds reimburse costs for treating, diagnosing, or preventing disease, along with expenses that affect any structure or function of the body.5Internal Revenue Service. Topic No. 502 – Medical and Dental Expenses In everyday terms, that covers:
- Doctor visits, hospital copays, coinsurance, and deductibles
- Prescription drugs and insulin
- Over-the-counter medications like pain relievers, allergy medicine, and cold remedies, which became permanently eligible without a prescription under the CARES Act6Internal Revenue Service. IRS Outlines Changes to Health Care Spending Available Under CARES Act
- Menstrual care products, also made permanently eligible under the CARES Act
- Dental cleanings, fillings, crowns, orthodontia, and extractions
- Eye exams, prescription glasses, contact lenses, and lens solution
What you can’t pay for: health insurance premiums, cosmetic procedures, gym memberships, and general wellness items like vitamins or toothpaste. A doctor’s letter of medical necessity can move some otherwise ineligible items into the reimbursable column when they’re prescribed to treat a diagnosed condition.
Eligible expenses can be incurred by you, your spouse, or your tax dependents, even if they’re not on your employer’s health plan. Keep documentation for every claim, typically an Explanation of Benefits or an itemized receipt showing the date of service, provider, and amount. Many plans issue a debit card that pulls straight from the account, but even card transactions often need follow-up substantiation.
Day-One Access to Your Full Election
Your entire annual election is available on the first day of the plan year, regardless of how much has actually been deducted from your paychecks. The IRS calls this the uniform coverage rule.7Internal Revenue Service. Publication 969 – Health Savings Accounts and Other Tax-Favored Health Plans Elect $3,400, have a $3,000 procedure in January, and you can be reimbursed the full amount even though only a few hundred dollars have been withheld. Your employer carries the risk if you leave the job before the deductions catch up, and they cannot accelerate your payroll deductions to make up for large early claims.
Practically, that means scheduling expensive planned care early in the plan year gives you interest-free access to money you haven’t contributed yet.
The Use-It-or-Lose-It Rule
Money left in your account at the end of the plan year, beyond any allowed carryover, is forfeited.8FSAFEDS. FAQs – What Is the Use or Lose Rule You don’t get it back as taxable income. It goes to your employer, who can use it to offset plan administration costs or reduce future contributions on a uniform basis. The IRS requires this forfeiture because letting employees keep unspent funds would turn the HCFSA into deferred compensation, which Section 125 prohibits.
The IRS lets employers soften the impact with one of two options, but not both, and no employer is required to offer either.
Grace Period
A grace period gives you up to two and a half extra months after the plan year ends to incur new qualified expenses using leftover funds.9Internal Revenue Service. IRS – Eligible Employees Can Use Tax-Free Dollars for Medical Expenses For a calendar-year plan, that runs through March 15. Expenses during the grace period draw from the old balance first.
Carryover
The carryover option rolls a limited amount of unused funds into the next plan year. For 2026, the maximum carryover is $680.1Internal Revenue Service. Revenue Procedure 2025-32 Employers can set a lower threshold, and anything above whatever limit they choose is forfeited. Carried-over funds don’t count against the next year’s $3,400 contribution cap, so you can still elect the full amount on top of your rollover.
Run-Out Period
Don’t confuse these with the run-out period. The run-out period is a window after the plan year ends during which you can submit claims for expenses you already incurred during the plan year. It only extends the paperwork deadline, not the spending deadline. Most employers set the run-out at about 90 days.
Leaving Your Job
Because your employer owns the account, leaving the job generally ends your access. You can still submit claims for expenses incurred before your last day of employment, but expenses after that date are not reimbursable.7Internal Revenue Service. Publication 969 – Health Savings Accounts and Other Tax-Favored Health Plans Any remaining balance is forfeited.
The risk is not symmetric. The uniform coverage rule lets you spend the whole election early in the year and leave mid-year having contributed less than you spent, with the employer absorbing the shortfall. But if you’ve contributed more than you’ve spent when you leave, you lose the excess. That asymmetry favors front-loading your spending.
HCFSA and HSA in the Same Year
You cannot contribute to both a standard HCFSA and a Health Savings Account in the same year. The IRS treats a general-purpose HCFSA as disqualifying coverage because it can reimburse expenses before you’ve met your high-deductible health plan deductible.10Office of the Law Revision Counsel. 26 USC 223 – Health Savings Accounts
If you’re on an HDHP and want to keep your HSA while still getting some FSA tax savings, ask whether your employer offers a Limited Purpose FSA (sometimes called a LEX HCFSA). This version only reimburses dental and vision expenses, leaving medical costs to flow through the HDHP and HSA.11FSAFEDS. Limited Expense Health Care FSA The $3,400 annual limit applies to the Limited Purpose FSA as well.1Internal Revenue Service. Revenue Procedure 2025-32
One boundary worth flagging: an HCFSA is not a dependent care FSA. The dependent care version covers child care and elder care expenses and has a separate $5,000 household limit. If your employer offers both, they run as separate accounts with separate elections and separate balances.
Picking an Election Amount
The penalty for overcontributing is losing money. The penalty for undercontributing is missing tax savings. Neither is fatal, but a few minutes of math before open enrollment usually pays off.
Start with what you know: recurring prescriptions, planned dental work, scheduled procedures, and the copays from your regular doctor visits. Add your annual eye exam and any glasses or contacts you replace on a predictable cycle. With kids in the picture, build in a cushion for the sick visits and minor injuries that show up whether you plan for them or not.
Then check which relief option your plan uses. With a carryover, you have a $680 safety net and can lean a bit higher. With a grace period, you get extra time but no rollover. With neither, err conservative: forfeiting $500 wipes out all the tax savings on that amount and then some.