A Health Savings Account (HSA) is a tax-advantaged savings account designed to help you pay for medical expenses. You contribute money before taxes, the balance grows tax-free, and withdrawals for qualified medical costs are also tax-free. That triple tax benefit makes an HSA one of the most powerful savings tools available, but you can only open one if you’re enrolled in a high-deductible health plan.
How the Triple Tax Advantage Works
An HSA gives you a tax break at three separate points, which no other account type offers. First, your contributions reduce your taxable income. If you contribute through payroll deductions, you also avoid Social Security and Medicare taxes on that money. Second, any interest or investment gains inside the account grow tax-free. Third, when you withdraw funds to pay for qualified medical expenses, you owe zero tax on the withdrawal.
To put this in practical terms: if you’re in the 22% federal tax bracket and contribute $4,400 to your HSA, you save roughly $968 in federal income tax that year. If you make those contributions through your employer’s payroll system, you save an additional 7.65% in payroll taxes, adding about $337 more in savings. Meanwhile, any growth on the invested balance compounds without being reduced by capital gains or dividend taxes.
Who Can Open an HSA
You must be enrolled in what the IRS calls a high-deductible health plan (HDHP). For 2026, that means your plan must have a minimum annual deductible of $1,700 for self-only coverage or $3,400 for family coverage. Your plan’s out-of-pocket maximum can’t exceed $8,500 for an individual or $17,000 for a family.
Beyond the plan requirement, you also cannot be enrolled in Medicare, claimed as a dependent on someone else’s tax return, or covered by a non-HDHP plan such as a spouse’s traditional insurance. If you meet all these criteria, you can open an HSA through your employer’s benefits program or independently through a bank or brokerage.
Contribution Limits for 2026
The IRS sets annual caps on how much you can put into your HSA. For 2026, the limit is $4,400 for self-only coverage and $8,750 for family coverage. If you’re 55 or older, you can contribute an additional $1,000 per year as a catch-up contribution. These limits include any contributions your employer makes on your behalf, so if your company puts $500 into your HSA, your own contributions must stay within the remaining balance.
You have until the tax filing deadline (typically April 15 of the following year) to make contributions for any given tax year. This gives you extra time to maximize your contributions if you didn’t reach the limit through payroll deductions alone.
What You Can Spend HSA Money On
Qualified medical expenses cover a broad range of costs. The obvious ones include doctor visits, hospital services, prescription medications, dental treatment, and vision care like eye exams and contact lenses. But the list goes well beyond that. You can use HSA funds for chiropractic care, mental health services, fertility treatments, hearing aids, ambulance services, and even certain home modifications made for medical reasons.
Less obvious qualified expenses include acupuncture, breast pumps, prescribed birth control, stop-smoking programs, weight-loss programs prescribed for a specific disease, service animals, and medical transportation costs. The IRS publishes a detailed list in Publication 502 that covers hundreds of eligible items.
If you withdraw money for something that isn’t a qualified medical expense before age 65, you’ll owe income tax on the amount plus a 20% penalty. That penalty disappears once you turn 65, though you’ll still owe regular income tax on non-medical withdrawals.
Using an HSA After Age 65
Once you turn 65, your HSA essentially works like a traditional retirement account for non-medical spending. You can withdraw money for any purpose and pay only ordinary income tax, with no penalty. This puts it on equal footing with a traditional IRA or 401(k) for general retirement spending.
The real advantage, though, is using HSA funds for medical expenses in retirement. Those withdrawals remain completely tax-free, and healthcare costs tend to be significant for retirees. You can also use HSA funds to pay Medicare premiums (Parts B, C, and D), long-term care insurance premiums, and out-of-pocket medical costs. For this reason, some people treat their HSA as a long-term investment account, paying current medical bills out of pocket and letting the HSA balance grow for decades.
HSA Funds Roll Over Indefinitely
Unlike a Flexible Spending Account (FSA), your HSA balance carries over from year to year with no expiration. There is no “use it or lose it” rule. Money you contribute at age 30 can sit in the account, invested and growing, until you need it at 70. The account belongs to you personally, not your employer. If you change jobs, your HSA goes with you.
An FSA, by contrast, typically requires you to spend most of your balance by year’s end or forfeit it. Some FSA plans allow a small rollover (up to $660 for 2025), but the rest is lost. FSAs also stay with your employer when you leave. This portability and unlimited rollover make the HSA a far more flexible savings vehicle for anyone with a longer time horizon.
Investing Your HSA Balance
Most HSA providers let you invest your balance in mutual funds, index funds, or other options once your cash balance reaches a certain threshold, often $1,000 or $2,000. This turns your HSA from a simple savings account into a genuine investment account. Because growth is tax-free, invested HSA funds compound more efficiently than money in a taxable brokerage account.
If you can afford to pay current medical expenses out of pocket and let your HSA balance stay invested, the long-term growth potential is substantial. A $4,400 annual contribution invested over 25 years at a 7% average return would grow to roughly $280,000, all of it available tax-free for medical costs in retirement. Even if you need to dip into the account occasionally for medical bills, investing the portion you don’t need right away still gives you a meaningful advantage over leaving the entire balance in cash.
How to Open an HSA
If your employer offers an HDHP with an HSA option, enrollment typically happens during open enrollment. Your employer may contribute a set amount to your account and will handle payroll deductions for your own contributions. If you’re self-employed or your employer doesn’t offer one, you can open an HSA at most major banks, credit unions, or brokerages as long as you have qualifying HDHP coverage. You’ll claim your tax deduction when you file your return using IRS Form 8889.
When choosing a provider, compare monthly fees, investment options, and minimum balance requirements. Some providers charge $2 to $5 per month in maintenance fees, while others waive fees entirely. The investment menu matters too: providers offering low-cost index funds will help your money grow faster than those limited to savings accounts or high-fee funds.