HSAs: The Retirement Account Hiding in Your Benefits Package

Health Savings Accounts get filed under "health benefits" during open enrollment, so they're easy to skim past as just another insurance decision. Inside the FIRE community, though, the HSA has earned a nickname: the "stealth IRA" — and once you see how it's actually taxed, it's easy to see why.

The triple tax advantage

Very few accounts in the U.S. tax code offer all three of these at once:

• Contributions are pre-tax (or tax-deductible if made outside payroll), lowering your taxable income the year you contribute.
• Growth is tax-free — dividends, interest, and capital gains inside the account aren't taxed while they compound.
• Withdrawals are tax-free, as long as the money goes toward qualified medical expenses.

A Traditional IRA gives you two of the three (pre-tax in, taxed on the way out). A Roth IRA gives you two of the three in the opposite order (taxed going in, tax-free out). The HSA is the rare account that can hit all three — provided the withdrawal is for qualified medical costs.

2026 and 2027 contribution limits

Coverage type	2026 limit	2027 limit
Self-only HDHP coverage	$4,400	$4,500
Family HDHP coverage	$8,750	$9,000
Catch-up (age 55+)	+$1,000	+$1,000

To contribute, you need to be enrolled in a qualifying high-deductible health plan (HDHP) — worth checking your specific plan's deductible against the current IRS thresholds, since not every "high deductible" plan on paper actually qualifies for HSA purposes. Also note that you can no longer contribute once you enroll in Medicare, though you can keep spending the balance.

What happens after age 65

This is the detail that makes the "stealth IRA" comparison actually hold up. Before 65, withdrawing HSA funds for anything other than qualified medical expenses triggers both income tax and a 20% penalty. After 65, that penalty disappears entirely — non-medical withdrawals are simply taxed as ordinary income, exactly like a Traditional IRA. Withdrawals for qualified medical expenses stay tax-free at any age, as long as the expense was incurred after you opened your HSA.

The strategy a lot of FIRE savers use

Because HSA funds never expire and the IRS doesn't set a deadline for reimbursing yourself, some savers do this:

1. Pay current medical bills out of pocket, if they can comfortably afford to, rather than pulling from the HSA.
2. Keep the receipts — all of them, indefinitely.
3. Let the HSA balance sit invested and compound for years or decades. Many providers let you invest the balance above a certain cash threshold, similar to a brokerage account.
4. Reimburse themselves tax-free at any future point, even decades later, for any qualified expense that was incurred after they opened the HSA, by submitting those old receipts.

This effectively turns the HSA into a long-term investment account that happens to also cover medical costs whenever you actually need it, rather than a simple pay-as-you-go medical spending account. The catch: expenses from before you opened the HSA don't count, and state law determines when an HSA is considered established, so don't start the receipt clock until the account is actually open.

Where it fits with your other accounts

An HSA doesn't replace a 401(k) or IRA — it's a complement, and it's only available if you have HDHP coverage in the first place. Plenty of financial planners suggest maxing an HSA before extra contributions beyond an employer 401(k) match, given its unmatched tax treatment, then continuing on with IRA or 401(k) contributions after that.

A lesser-known use: paying for long-term care insurance

Here's a detail most HSA explainers skip entirely. Regular health insurance premiums generally can't be paid out of an HSA — but long-term care insurance is one of the few exceptions (the others are COBRA continuation coverage, coverage while you receive unemployment benefits, and, once you're 65 or older, Medicare premiums but not Medigap). You can withdraw HSA funds tax-free to pay for a tax-qualified long-term care policy, up to an age-based limit set by the IRS each year:

Your age (end of tax year)	2026 HSA-eligible LTC premium limit
40 or younger	$500
41–50	$930
51–60	$1,860
61–70	$4,960
71 or older	$6,200

These are the 2026 limits; the IRS updates them each year, so check the current figure before you plan around it.

Given how thin long-term care insurance ownership actually is, this is a genuinely underused way to make a policy meaningfully cheaper — the limit rises specifically as you get older and premiums typically get more expensive, which is a convenient bit of timing.

Sources

• IRS Publication 969, Health Savings Accounts and Other Tax-Favored Health Plans — $1,000 catch-up, the 20% additional tax and age-65 exception, expenses incurred before the HSA exists, premium exceptions, Medicare eligibility
• IRS Rev. Proc. 2025-19 — 2026 HSA limits ($4,400 self-only, $8,750 family) and HDHP thresholds
• IRS Rev. Proc. 2026-24 — 2027 HSA limits ($4,500 self-only, $9,000 family)
• IRS Rev. Proc. 2025-32 — 2026 age-based long-term care premium limits

This article is for educational purposes only and is not tax advice. HSA eligibility rules, contribution limits, and age-based premium limits change annually and vary by plan — confirm current figures with the IRS (Revenue Procedure updates, Publication 969) or a licensed tax advisor.