Health savings accounts (HSAs) explained
An HSA is one of the most tax-efficient accounts available. Who can open one, how the tax benefits work and how to use it as a long-term investment.
A health savings account (HSA) is a tax-advantaged account for medical expenses, available to people covered by a qualifying high-deductible health plan. It is often called the most tax-efficient account in the US tax code, because money can go in, grow and come out without being taxed at all, as long as it is spent on qualified medical costs. This guide explains who can open a health savings account, the triple tax advantage, the 2026 contribution limits, and how to use an HSA as a long-term investment.
Who can open an HSA
To contribute, you must be covered by an HSA-eligible high-deductible health plan (HDHP), have no other disqualifying health coverage, not be enrolled in Medicare, and not be claimed as someone else's dependent. From 2026, bronze and catastrophic plans bought through the Health Insurance Marketplace are also treated as HSA-eligible, which widens access.
HSA contribution limits for 2026
Annual contribution limits are set by the IRS each year. For 2026, the limit is $4,400 for self-only coverage and $8,750 for family coverage, with an extra $1,000 catch-up contribution allowed from age 55. Employer contributions count towards these limits. You can contribute for a tax year up until the tax filing deadline the following April.
The triple tax advantage
First, contributions are tax-deductible, or pre-tax if made through payroll, which also avoids Social Security and Medicare taxes. Second, the money grows tax-free. Third, withdrawals for qualified medical expenses are tax-free. No other common account offers all three.
For someone in the 22% federal bracket contributing $4,400 through payroll, the federal income tax saving alone is $968, plus about $337 in Social Security and Medicare taxes avoided, before any state tax savings.
Spending or investing your HSA
You can use your HSA like a medical debit account to pay doctor bills, prescriptions, dental and vision costs. But unlike a flexible spending account, unused money rolls over every year and stays yours if you change jobs or plans. Many HSA providers let you invest your balance in funds once it passes a certain level.
Some people pay current medical costs out of pocket, keep the receipts, and leave their HSA invested to grow for decades. Because there is no time limit on reimbursing yourself for a qualified expense incurred after the account was opened, they can withdraw that money tax-free years later.
Using an HSA after age 65
After 65, you can withdraw HSA money for any purpose without the 20% penalty that applies to non-medical withdrawals before then. Non-medical withdrawals are taxed as ordinary income, similar to a traditional IRA, while medical withdrawals remain tax-free. That makes an HSA a useful supplement to your retirement accounts, since healthcare is one of the largest costs in retirement. Once you enroll in Medicare you can no longer contribute, but you can keep using the balance.
Is an HSA right for you?
A high-deductible plan means paying more out of pocket before insurance kicks in. If you are generally healthy and can afford the deductible, the HSA's tax benefits can more than make up for it. If you expect heavy medical costs, compare the total cost of each plan, including premiums and maximum out-of-pocket amounts, before choosing. Keeping an emergency fund in a high-yield savings account helps you cover the deductible without dipping into investments.
HSAs in your savings plan
A common order is to contribute enough to your 401(k) to get the full employer match, then fund an HSA, then add more to your 401(k) or IRA. See the 2026 401(k) and IRA limits and how pre-tax contributions affect your paycheck in our US paycheck calculator.
Frequently asked questions
What is the HSA limit for 2026?
$4,400 for self-only coverage and $8,750 for family coverage, plus $1,000 catch-up from age 55.
Does HSA money expire?
No. Unused money rolls over every year and stays yours.
Can I use my HSA for non-medical expenses?
Yes, but before 65 you pay income tax plus a 20% penalty; after 65 you pay only income tax.
Sources
This article is general information, not financial advice.