HSA: the most underrated retirement account
Triple tax advantage, no required minimum distributions, and after 65 you can use it for anything. The Health Savings Account quietly outperforms most other retirement vehicles.
Most people think of the HSA as a checking account for medical bills. It can be — but treating it that way misses the point. The HSA is the only account in the U.S. tax code that offers three separate tax advantages at once. Used correctly, it can be the most efficient long-term retirement vehicle available.
Here's why and how.
The triple tax advantage
HSA contributions are:
- Deductible going in — contributions reduce your taxable income, just like a Traditional IRA or 401(k).
- Tax-free while growing — invested balances grow tax-deferred (and tax-free for qualified withdrawals).
- Tax-free coming out — withdrawals for qualified medical expenses are not taxed, ever.
No other account does all three. A Traditional 401(k) gives you the first two but taxes withdrawals. A Roth IRA gives you the second two but doesn't deduct the contribution. The HSA does all three — plus, if your employer payroll-deducts the contribution, you also avoid the 7.65% FICA tax (most other accounts don't).
Who qualifies
To contribute to an HSA, you must be enrolled in a High-Deductible Health Plan (HDHP). For 2025, an HDHP must have:
- Minimum annual deductible of $1,650 (self-only) or $3,300 (family)
- Maximum out-of-pocket of $8,300 (self-only) or $16,600 (family)
You also can't be enrolled in other non-HDHP health coverage (including Medicare), can't be claimed as a dependent on someone else's return, and can't have access to a general-purpose Health FSA.
2025 contribution limits
| Coverage | Limit | Catch-up (55+) |
|---|---|---|
| Self-only | $4,300 | +$1,000 |
| Family | $8,550 | +$1,000 |
If you're 55 or older, you can add $1,000 to either limit. (Each spouse can take their own $1,000 catch-up if both have HSAs.)
You have until the tax filing deadline (April 15) to make HSA contributions for the prior year — similar to IRA timing.
The two ways to use an HSA
Approach 1: Pay current medical expenses
The default mode. Contribute to the HSA, then pay this year's deductibles, copays, prescriptions, and other qualified medical expenses from the HSA. You get the tax deduction and pay no tax on the withdrawal. Useful when cash flow is tight.
Approach 2: Invest and let it grow (recommended if you can)
The far more powerful approach: contribute to the HSA, then pay current medical bills out of regular checking. Invest the HSA balance in index funds and let it grow tax-free for decades. Save your medical receipts — but don't reimburse yourself until retirement.
Why? Because qualified medical expenses incurred today can be reimbursed at any future date, with no time limit. A $500 prescription you paid for in 2025 can be withdrawn from your HSA tax-free in 2055 — provided you kept the receipt and the HSA was open at the time.
In effect, you get to bank tax-free withdrawal capacity for decades while your balance compounds.
What counts as a qualified medical expense
The IRS list (Publication 502) is broad. Common items:
- Deductibles, copays, and coinsurance
- Prescriptions (and many over-the-counter drugs, since the CARES Act)
- Dental and orthodontia
- Vision (glasses, contacts, LASIK)
- Mental health and therapy
- Medicare premiums (Part B, Part D, Medicare Advantage — but not Medigap)
- Long-term care insurance premiums (subject to age-based limits)
- COBRA premiums during unemployment
What doesn't qualify: cosmetic procedures, gym memberships (usually), regular health insurance premiums (except above), and over-the-counter items not used for a specific medical purpose.
After age 65, the HSA becomes a Traditional IRA — but better
Once you turn 65, withdrawals from the HSA for non-medical expenses no longer carry a 20% penalty — they're just taxed as ordinary income, exactly like a Traditional IRA distribution.
But medical expenses (including Medicare premiums) are still tax-free at any age. So an HSA in retirement is effectively:
- A Roth IRA for medical expenses (tax-free in)
- A Traditional IRA for everything else (taxed on the way out)
And unlike Traditional IRAs, HSAs have no required minimum distributions at any age. You're never forced to withdraw.
The math on long-term growth
A 35-year-old contributing the family max ($8,550) every year, growing at 7%, would have roughly $1.3 million in their HSA at age 65 — entirely tax-free if used for qualified medical expenses. Given that the average retired couple spends $300,000+ on healthcare in retirement (and that's before long-term care), this is one of the best matches between problem and solution in the entire tax code.
HSA balance growth — max family contribution at 7% return
Compounds tax-free. The triple tax advantage (deductible in, tax-free growth, tax-free out for medical) compounds quietly across decades into one of the most efficient accounts available.
The catch: state taxes
California and New Jersey don't recognize HSAs as tax-advantaged at the state level. Residents of those states still get the federal benefit but pay state tax on contributions and earnings. For Texas residents this isn't an issue (no state income tax).
The bottom line
If you're enrolled in an HDHP, the HSA should be the second account you fund — after capturing any 401(k) employer match, but before maxing out IRAs or after-tax investing. The triple tax advantage, indefinite reimbursement window, and lack of RMDs make it the single most efficient long-term account available.
The biggest mistake we see: people contributing to HSAs and then spending the balance every year on current medical bills. If you can afford to pay current bills out of cash flow, leave the HSA invested. Future you will be grateful.
Questions about your HSA strategy or contribution limits? Reach out.
This article is general information, not personalized tax or investment advice. Contribution limits and rules change every year. Consult a tax professional for your specific situation.