The HSA: The Only Account With Three Tax Advantages

A health savings account is the only account in the U.S. tax code that offers three tax advantages simultaneously: contributions are tax-deductible (reducing taxable income now), growth is tax-free (no capital gains on investments inside the account), and withdrawals for qualified medical expenses are tax-free. A traditional IRA offers the first two. A Roth IRA offers the second and third. The HSA does all three — but only for people enrolled in a qualifying high-deductible health plan.

In 2024, the contribution limits are $4,150 for individual coverage and $8,300 for family coverage, with an additional $1,000 catch-up allowed for those 55 and older. Contribute $8,300 in a 24% tax bracket and you immediately save $1,992 in federal taxes. Invest the balance in a low-cost index fund, let it grow for 20 years tax-free, and withdraw for medical expenses with no tax due. That's a substantial advantage for anyone who can access it.

The HDHP requirement — what qualifies

To contribute to an HSA, you must be enrolled in a high-deductible health plan and have no other disqualifying coverage. For 2024, an HDHP is defined as a plan with a minimum deductible of $1,600 for individual coverage or $3,200 for family coverage, and maximum out-of-pocket limits of $8,050 (individual) or $16,100 (family). Many employer-sponsored plans now qualify — check your plan documents or ask your HR department.

The HDHP trade-off: you pay more out-of-pocket before insurance kicks in, which is a real financial risk if you have significant health expenses. The HSA is designed to fund that out-of-pocket exposure. For healthy people with low medical utilization, the combination of an HDHP's lower premiums and HSA tax advantages often produces better net results than a low-deductible plan with higher premiums. For people with chronic conditions or predictable high medical spending, the lower-deductible plan's cost certainty may outweigh the HSA advantage.

Using the HSA as a retirement account — the strategy most people miss

The most powerful HSA strategy is to pay current medical expenses out of pocket — if you can afford to — and let the HSA balance grow invested. Save every medical receipt. After years of growth, you can reimburse yourself for those old qualified expenses at any time — the IRS imposes no time limit on reimbursements as long as the expense occurred after the HSA was established. This creates a reservoir of tax-free withdrawals you can access at any future point.

After age 65, the medical expense restriction disappears entirely — you can withdraw HSA funds for any purpose, similar to a traditional IRA. Withdrawals for non-medical expenses are taxed as ordinary income but no longer penalized. This means an HSA at 65 functions like a traditional IRA with an extra layer of optionality: withdraw for medical expenses tax-free, or withdraw for anything else at ordinary income rates. There's no scenario where an HSA loses to a traditional IRA — the triple tax advantage is strictly superior when medical expenses are your use case.

The investment menu matters

Many employer-provided HSA accounts default to a cash position earning a minimal interest rate and offer a limited investment menu with high-expense-ratio funds. If your employer HSA has poor investment options, you can often transfer the balance annually to a standalone HSA provider with better options — Fidelity's HSA, for example, offers index funds with no investment minimums and expense ratios below 0.02%. Check whether your employer allows in-service transfers of HSA balances to another custodian.

The gap between a cash HSA and an invested HSA compounds dramatically over decades. $8,300 per year invested for 25 years at a 7% return produces roughly $575,000. The same contributions held in cash at 0.5% produce about $230,000. An HSA is only as powerful as how it's invested — leaving it in cash negates most of the advantage beyond the annual contribution deduction.

What counts as a qualified medical expense

IRS Publication 502 lists qualified medical expenses in detail, and the list is broader than most people expect. Beyond doctor visits and prescriptions, it includes dental care, vision care (glasses, contacts, LASIK), mental health services, physical therapy, medical equipment, long-term care insurance premiums (subject to age-based limits), and Medicare premiums after age 65. It does not include cosmetic procedures, gym memberships, or over-the-counter medications without a prescription — though the CARES Act in 2020 expanded OTC eligibility for some items.

Keep documentation for every qualified medical expense you pay out of pocket — the date, amount, and a description of the medical service. Digital receipts in a dedicated folder work fine. This paper trail enables the delayed reimbursement strategy and protects you if the IRS questions an HSA withdrawal.