A health savings account (HSA) is the only account in the US tax code that can give you three separate tax breaks on the same dollar: your contributions go in pretax, the balance grows tax-free and withdrawals for qualified medical costs come out tax-free. That combination makes it one of the most efficient ways to pay for healthcare — and, increasingly, to save for retirement.
The catch is that not everyone can open one. An HSA is tied to a specific kind of health insurance, and it works very differently from the flexible spending account (FSA) many people know from open enrollment.
What is a health savings account?
An HSA is a tax-advantaged account you use alongside a high-deductible health plan (HDHP) to pay for qualified medical expenses. You own the account, the money rolls over every year and you can invest the balance so it grows over time.
Here’s what the triple tax advantage looks like in practice. Say you’re in the 22% federal tax bracket and contribute $4,000 to your HSA. Because contributions are pretax, you trim roughly $880 off your federal tax bill for the year. If you then invest that $4,000 and later spend it — plus any growth — on qualified medical costs, you never pay tax on it again. No other account treats a single dollar that generously.
How an HSA works — step-by-step
Getting started with an HSA takes a few steps, most of which happen once and then run in the background:
Enroll in an HSA-eligible HDHP. You can only contribute to an HSA if your health plan meets the IRS definition of a high-deductible health plan for the year.
Open an HSA. You can open one through your employer, a bank or a brokerage. The account is yours regardless of who administers it.
Contribute. Add money through pretax payroll deductions or direct deposits you deduct at tax time, up to the annual limit.
Spend or invest. Pay for qualified medical expenses tax-free or leave the balance invested to grow for later.
Carry it forward. Whatever you don’t spend rolls over year after year. It’s yours for life.
Hot tip: The key difference from an FSA
Unlike a flexible spending account, HSA money never expires and follows you from job to job. There’s no deadline to spend it.
Who is eligible for an HSA?
To contribute to an HSA in 2026, you need to be enrolled in an HSA-eligible HDHP, which the IRS defines as a plan with a minimum annual deductible of $1,700 for self-only coverage or $3,400 for family coverage and an out-of-pocket maximum no higher than $8,500 for self-only coverage or $17,000 for family coverage.(1) You also can’t be enrolled in Medicare, be claimed as someone else’s dependent or have disqualifying coverage such as a general-purpose FSA.(2)
One recent change is worth flagging: starting January 1, 2026, bronze and catastrophic plans bought on an Affordable Care Act (ACA) marketplace count as HSA-compatible, even if they don’t meet the traditional HDHP tests.(2)
HSA contribution limits for 2026 and 2027
The IRS sets HSA contribution limits each year, and they depend on whether you have self-only or family coverage. People 55 and older can add a $1,000 catch-up contribution on top.
Coverage
2026 limit
2027 limit
Self-only
$4,400
$4,500
Family
$8,750
$9,000
Catch-up (age 55+)
$1,000
$1,000
The 2026 limits come from IRS Revenue Procedure 2025-19.(1) The 2027 figures have already been announced.(3) Both employer and employee contributions count toward the limit, so if your employer puts in $1,000, you can add the rest yourself.
What makes an HSA so powerful
Beyond the tax treatment, a handful of features set HSAs apart from other health accounts:
It rolls over. Unused funds carry forward every year with no deadline to spend them.
It’s portable. The account stays with you when you change jobs, health plans or retire.
It’s investable. Many providers let you invest the balance above a cash threshold, so it can grow like a retirement account.
It becomes more flexible at 65. Once you turn 65, you can withdraw HSA money for any reason — you’ll just pay ordinary income tax on non-medical withdrawals, with no additional penalty.
What can you spend HSA money on?
HSA funds cover a wide range of qualified medical expenses, including deductibles, copays and coinsurance, prescriptions, dental and vision care such as exams, glasses and contacts, many over-the-counter medications and menstrual products and certain medical equipment.(4) Health insurance premiums and cosmetic procedures generally don’t qualify. The IRS lists eligible expenses in Publication 502.
Who is an HSA best for?
People on an HDHP. If you’re already enrolled in a qualifying plan, an HSA is the most tax-efficient way to cover out-of-pocket costs.
Self-employed workers. Anyone with an HSA-eligible plan can open one, even without an employer benefits package.
Long-term savers. If you can pay medical costs out of pocket now and leave the HSA invested, it can become a powerful retirement tool.
Bottom line
If you have a high-deductible health plan, an HSA is hard to beat for tax efficiency — and it doubles as a long-term savings account few people take full advantage of. If you don’t have an HDHP, a flexible spending account may be the better fit. Compare the two in our guide to HSA vs. FSA, and see how an HSA fits alongside the best brokerage accounts for investing.
Ready to put your HSA to work?
Compare investment platforms to grow your health savings over the long term.
Not with a general-purpose FSA — that counts as disqualifying coverage and blocks HSA contributions. But a limited-purpose FSA (for dental and vision only) or a dependent care FSA can be paired with an HSA. See our HSA vs. FSA comparison for the full breakdown.
The account is yours to keep. It moves with you when you switch employers or health plans, and the balance never expires. After age 65, you can withdraw the money for any purpose, paying only ordinary income tax on non-medical withdrawals.
Usually, yes. Many HSA providers let you invest the balance above a set cash threshold in funds or other assets, and any growth is tax-free when used for qualified medical expenses.
Sources
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Finder is not an advisor or brokerage service. Information on this page is for educational purposes only and not a recommendation to invest with any one company, trade specific stocks or fund specific investments. All editorial opinions are our own.
Matt Miczulski is an investments editor and market analyst at Finder. With over 450 bylines, Matt dissects and reviews brokers and investing platforms to expose perks and pain points, explores investment products and concepts and covers market news, making investing more accessible and helping readers to make informed financial decisions.
Before joining Finder in 2021, Matt covered everything from finance news and banking to debt and travel for FinanceBuzz. His expertise and analysis on investing and other financial topics has been featured on Yahoo Finance, CBS, MSN, Best Company and Consolidated Credit, among others. Matt holds a BA in history from William Paterson University.
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