Every other tax-advantaged account gives you two of the three possible breaks. Traditional accounts are deductible going in and taxed coming out. Roth accounts are taxed going in and tax-free coming out. The Health Savings Account is the only one that is tax-advantaged at all three stages: your contribution is deductible, the money grows with no tax, and withdrawals for qualified medical expenses are tax-free. Nothing else in the US tax code does all three at once.
The 2026 numbers
For 2026, you can contribute $4,400 with self-only coverage or $8,750 with family coverage, plus a $1,000 catch-up if you are 55 or older. The one requirement is that you must be covered by an HSA-eligible high-deductible health plan, and not enrolled in other disqualifying coverage such as Medicare.
The trick that turns it into a retirement account
Most people treat the HSA as a spending account, paying medical bills straight out of it. That works, but it wastes the account’s best feature. The smarter approach for those who can afford it: contribute the maximum, invest the balance instead of leaving it in cash, and pay current medical bills out of pocket. Then save the receipts.
Here is why. There is no deadline to reimburse yourself for a qualified medical expense. A bill you pay out of pocket in 2026 can be reimbursed from the HSA tax-free years or even decades later, after the balance has compounded. In the meantime the money grows completely untaxed, exactly like a Roth, while you hold a stack of receipts that entitle you to pull it out tax-free whenever you choose.
After 65 it gets even more flexible
Once you turn 65, the HSA loosens up. You can withdraw the money for any reason, not just medical, and the withdrawal is taxed as ordinary income with no penalty, which makes it behave just like a traditional IRA. And because healthcare is one of the largest expenses in retirement, qualified medical withdrawals stay tax-free for life. In practice, a well-funded HSA becomes a dedicated, tax-optimized pool for the medical costs almost everyone faces later.
Where it sits in the order
Because of the triple advantage, many people fund the HSA immediately after capturing their 401(k) employer match, ahead of even the Roth IRA. The dollars simply work harder inside an HSA than anywhere else, provided you can leave them invested and cover current medical costs from cash flow.
To see your HSA room for 2026 alongside your 401(k), IRA, and Roth, run the 2026 contribution room calculator.
Source: IRS — Publication 969 (Health Savings Accounts and other tax-favored health plans).