HSAs: the best retirement account you're not using

The Health Savings Account is the best account in the entire US tax code and most people either don't know it exists or use it wrong. If you have an HSA-eligible health plan, pay attention.

Why it's special

Every tax-advantaged account gives you a tax break in one place: Traditional IRA gives you pre-tax in, taxed out. Roth gives you post-tax in, tax-free out. HSA does all three — pre-tax in, tax-free growth, tax-free out for qualified medical expenses. Zero taxes, ever, as long as the money eventually covers healthcare.

The secret: don't use it for current medical bills

Most people use their HSA as a debit card for doctor visits, which is fine but wastes the real power. The sophisticated play: pay medical expenses out of pocket, save the receipts, and let your HSA grow invested for decades. There is no time limit on reimbursing yourself. A $300 doctor visit you paid for in 2025 can be reimbursed from a much larger HSA balance in 2050, tax-free.

The retirement escape hatch

After age 65, you can use HSA money for any purpose. Non-medical withdrawals are taxed like a Traditional IRA (ordinary income, no penalty). So worst case, your HSA becomes a Traditional IRA at 65. Best case — if you accumulated medical receipts over the years — it stays tax-free forever.

Requirements

• You must be enrolled in an HSA-eligible High Deductible Health Plan (HDHP).
• You can't be enrolled in other non-HDHP health insurance or Medicare.
• You can't be claimed as a dependent on someone else's tax return.