An HSA (health savings account) is yours to keep forever, lets your money grow and works with high-deductible health plans. An FSA (flexible spending account) is tied to your employer and is mostly “use it or lose it” each year. Both let you pay medical costs with pre-tax money. For 2026, you can put up to $4,400 in an HSA ($8,750 for family coverage) or $3,400 in a health FSA.
HSA vs FSA at a glance (2026)
| Feature | HSA | Health FSA |
|---|---|---|
| Who can open one | People with an HSA-eligible high-deductible health plan | Employees whose employer offers one |
| 2026 limit | $4,400 self-only, $8,750 family, +$1,000 if 55+ | $3,400 per employee |
| 2027 limit | $4,500 self-only, $9,000 family | Set annually by the IRS |
| Unused money | Rolls over forever | Lost, unless the plan allows a carryover (up to $680) or grace period |
| Owned by | You, even if you change jobs | Your employer’s plan |
| Can be invested | Yes | No |
| Tax treatment | Tax-free in, growth and out for medical costs | Tax-free in and out for medical costs |
Why the HSA is so powerful
The HSA is the only account with a triple tax advantage: contributions are pre-tax, growth is tax-free, and withdrawals for qualified medical costs are tax-free. After age 65 you can withdraw for any reason and pay only income tax, like a traditional IRA. Many people invest their HSA and pay small medical bills out of pocket, letting the account grow for retirement health costs.
From 2026, more people can open one: bronze and catastrophic marketplace plans now count as HSA-eligible, and certain direct primary care arrangements no longer disqualify you.
When an FSA makes sense
- Your plan is not HSA-eligible, so an FSA is your only pre-tax option.
- You have predictable costs such as glasses, prescriptions, dental work or braces.
- You want the full annual amount available on day one; FSAs let you spend your whole election early in the plan year.
Plan carefully, though. Estimate only what you are sure to spend, because unused money above any carryover is lost.
Can you have both?
Usually not a regular health FSA and an HSA at the same time. But you can pair an HSA with a limited-purpose FSA, which covers only dental and vision costs. That lets you save in the HSA while still using pre-tax money for those expenses.
How to choose
- Compare health plans first. A high-deductible plan plus an HSA suits healthy people who can cover the deductible from savings.
- If you choose an HSA, contribute at least enough to get any employer contribution.
- If you choose an FSA, add up last year’s medical spending and elect a bit less.
Thinking about retirement savings too? Compare Roth vs traditional IRA and see how much you need to retire.
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Frequently asked questions
What happens to my HSA if I change jobs?
You keep it. The account and all the money in it belong to you.
What happens to my FSA if I leave my job?
Usually you lose access to unused funds unless you elect COBRA continuation, so spend it before your last day if you can.
Can I use an HSA for non-medical costs?
Before 65, non-medical withdrawals are taxed and hit with a 20% penalty. After 65, you pay only income tax.
This article is general information, not financial advice.
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