Health savings accounts are usually sold as a way to cover doctor visits and prescriptions tax-free, but the accounts carry a second identity that many holders never use. Once the accountholder turns 65, the money inside stops behaving like a narrow medical fund and starts behaving like a second IRA, one with its own contribution habits, its own withdrawal rules, and its own place in a retirement income plan.
What Actually Changes at 65
Under IRS Publication 969, any HSA withdrawal spent on something other than a qualified medical expense before age 65 triggers both ordinary income tax and a 20% additional tax, a penalty steep enough to keep most holders from touching the account for anything but health costs. That 20% penalty disappears entirely once the accountholder reaches 65. A withdrawal for a non-medical purpose, a home repair, a grandchild’s tuition, ordinary living expenses, still counts as taxable income in the year it’s taken, but it is no longer punished the way an early withdrawal is. That is the same tax treatment a traditional IRA or 401(k) distribution receives, which is why financial planners describe a well-funded HSA at 65 as a second retirement account hiding inside a health benefit.
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Medical Withdrawals Stay Tax-Free for Life
The age-65 shift only applies to non-medical spending. Publication 969 is explicit that withdrawals used for qualified medical expenses remain entirely tax-free at any age, including after 65, which means an accountholder who keeps using the money the way it was originally intended sees no change at all. The practical result is that a retiree gets to choose, year by year, whether a given withdrawal counts as a tax-free medical expense or an ordinary-income withdrawal, a flexibility that neither a traditional IRA nor a Roth IRA offers on its own.
The Contribution Window Closes With Medicare Enrollment
The second retirement account does not last forever. Publication 969 states that a person can no longer contribute to an HSA once enrolled in any part of Medicare, including Part A, which many people trigger automatically by claiming Social Security after 65. For 2026, the annual contribution limits under IRS Revenue Procedure 2025-19 are $4,400 for self-only coverage and $8,750 for family coverage, with an extra $1,000 catch-up contribution allowed starting at age 55; a married couple who are both 55 or older and both eligible must use two separate HSAs to each claim that catch-up amount. Anyone still working past 65 who wants to keep contributing has to delay Medicare enrollment and stay on a qualifying high-deductible health plan, a decision with its own tradeoffs around employer coverage and the Medicare late-enrollment penalty.
Paying Medicare Premiums Tax-Free From the Same Account
Once Medicare starts, the HSA does not go idle. Publication 969 confirms that HSA funds can still be withdrawn tax-free to pay Medicare Part B premiums, Part D prescription drug premiums, and Medicare Advantage premiums, along with other qualified medical expenses like deductibles, copays, and dental or vision costs that Medicare does not fully cover. The one notable exception is Medigap: premiums for Medicare supplement policies are not an eligible tax-free HSA expense. For a retiree drawing Social Security and watching a fixed monthly budget, routing Part B and Part D premiums through an HSA rather than a checking account can mean paying those bills with money that was never taxed going in and is never taxed coming out.
Why the Order of Withdrawals Matters
Because non-medical HSA withdrawals after 65 are taxed exactly like a traditional IRA distribution, the account fits into the same kind of sequencing decisions retirees already make with 401(k)s and IRAs. Some retirees choose to pay smaller medical bills out of pocket in their working years, let the HSA balance grow, and lean on it later specifically because it offers a choice IRAs don’t: tax-free if spent on medical care, ordinary-income if spent on anything else, with no penalty either way after 65. Others use it as a straightforward source of tax-free money for premiums and out-of-pocket medical costs throughout retirement, since those categories, not living expenses, typically make up a growing share of an older household’s budget.
What This Means for Estate and Spending Plans
An HSA left unspent at death does not receive the same favorable treatment an inherited IRA can get. A surviving spouse who inherits an HSA can treat it as their own and keep the same tax rules, but most other heirs must include the full balance as taxable income in the year they inherit it, which is one reason financial planners generally recommend spending down an HSA, or at minimum tracking saved medical receipts to reimburse tax-free later, rather than treating it purely as a legacy account. For someone approaching 65, the account is worth a fresh look either way: what was built as a narrow medical fund is, by law, about to start functioning as a second retirement account.
This article was produced with the assistance of AI and reviewed by The Financial Wire editorial team.
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Warren Cohen is a finance writer based in Phoenix, Arizona, covering personal finance topics including credit, banking, and beginner investing. He earned his degree in business administration from Arizona State University and began his career working in consumer finance, where he gained direct experience with lending and credit systems. He now writes for personal finance websites and fintech platforms, focusing on clear, practical content that helps readers make informed financial decisions.
