An HCFSA, or Health Care Flexible Spending Account, is an employer-sponsored benefit that lets you set aside pre-tax money from your paycheck to pay for medical, dental, and vision expenses your insurance doesn’t cover. The money comes out of your salary before federal income tax, Social Security tax, and Medicare tax are calculated, which means every dollar you contribute effectively costs you less than a dollar. For 2025, you can contribute up to $3,300 per year.
How an HCFSA Works
During your employer’s open enrollment period, you choose how much money to put into your HCFSA for the coming year. That amount is divided evenly across your paychecks as pre-tax deductions. When you pay for an eligible medical expense out of pocket, you submit a claim for reimbursement from the account.
One important feature separates an HCFSA from a savings account: your full annual election is available on day one of the plan year, even though you haven’t contributed it all yet. If you elect $3,300 for the year and need $2,000 worth of dental work in January, you can be reimbursed for the full amount immediately. Your payroll deductions continue for the rest of the year to cover that balance. And if you leave your job before you’ve contributed the full amount, you won’t owe the difference.
Tax Savings in Practice
The tax advantage is straightforward. If you’re in the 22% federal tax bracket and contribute $3,300, you avoid paying roughly $726 in federal income tax on that money. You also skip the 7.65% in Social Security and Medicare taxes, saving another $252 or so. That’s close to $1,000 in total tax savings on expenses you were going to pay for anyway. The exact savings depend on your tax bracket and state income tax rates.
What You Can Spend It On
HCFSA funds cover a wide range of out-of-pocket health costs. The IRS defines eligible expenses broadly, and the list is longer than most people expect:
- Medical care: doctor copays, surgery, hospital services, lab fees, physical exams, X-rays, ambulance services
- Dental: cleanings, fillings, crowns, orthodontics, artificial teeth
- Vision: eye exams, glasses, contact lenses, vision correction surgery
- Mental health: psychiatric care, psychologist visits, therapy
- Prescriptions and supplies: prescribed medications, insulin, bandages, crutches, hearing aids, breast pumps
- Fertility and reproductive health: fertility treatments, birth control pills, condoms, pregnancy test kits, vasectomy
- Other: acupuncture, chiropractic care, smoking cessation programs, weight-loss programs (when treating a specific disease), guide dogs and service animals
Over-the-counter drugs generally need a prescription to qualify, with a few exceptions like insulin, bandages, and certain reproductive health items like condoms and pregnancy tests. Cosmetic procedures, general wellness supplements, and gym memberships are not eligible.
The Use-It-or-Lose-It Rule
The biggest risk with an HCFSA is overestimating your expenses. Unlike a health savings account (HSA), HCFSA funds don’t roll over indefinitely. Most plans follow a “use it or lose it” structure, though many employers now offer a carryover option. For 2025, you can carry over up to $660 in unused funds into the next plan year, as long as you re-enroll in the account. Any amount beyond that is forfeited.
After the plan year ends on December 31, you typically have until April 30 of the following year to submit claims for expenses you incurred during the plan year. This is called the run-out period. It gives you extra time to file paperwork, but the expenses themselves must have occurred before the plan year ended (or before the grace period ended, if your plan uses a grace period instead of carryover).
How to Choose the Right Amount
Since you can lose money you don’t spend, it pays to estimate conservatively. Start by looking at last year’s out-of-pocket medical costs: copays, prescriptions, dental work, glasses or contacts. If you know you have planned expenses coming up (braces, a scheduled procedure, new glasses), factor those in. A safe approach is to contribute only what you’re confident you’ll spend, then use the carryover cushion if you end up slightly under.
You generally can’t change your election amount mid-year unless you experience a qualifying life event. These include marriage, divorce, the birth or adoption of a child, death of a spouse or dependent, or a change in employment status that affects your health insurance eligibility. The change you request has to be consistent with the event. For example, having a baby would justify increasing your election to cover additional medical costs.
What Happens If You Leave Your Job
If you separate from your employer or retire before the plan year ends, your HCFSA terminates on your separation date. You can still submit claims for eligible expenses incurred before that date, but anything after is not reimbursable. There are no extensions.
This works both ways, though. If you elected $3,300 for the year but only had $1,500 deducted from your paychecks before leaving, and you already spent the full $3,300 in reimbursements, you keep that money. You won’t be asked to pay back the difference. This makes it strategically useful to front-load big medical expenses early in the plan year if you anticipate a job change.
HCFSA vs. HSA
People often confuse HCFSAs with health savings accounts. The key differences come down to flexibility and requirements. An HSA requires you to be enrolled in a high-deductible health plan, and the funds roll over year after year with no deadline to spend them. An HCFSA works with any health plan your employer offers, but the funds largely expire at year’s end (minus the carryover amount). You also can’t take an HCFSA with you when you leave a job, while HSA funds are always yours. Some people who qualify for both use an HSA for long-term savings and a limited-purpose HCFSA specifically for dental and vision expenses.