HSA Savings Accounts: The Underrated Triple-Tax Win

No savings vehicle in U.S. law offers three simultaneous tax benefits — only the HSA does.

The HSA's triple tax advantage is genuine and unique. No other federally recognised savings vehicle in the United States offers all three simultaneously: (1) contributions are tax-deductible (or pre-tax through payroll); (2) growth is tax-free; (3) qualified withdrawals are tax-free. The nearest comparison — the Roth IRA — provides only two of the three (after-tax contributions, tax-free growth, tax-free withdrawal; but no deduction on contribution).

To contribute to an HSA, you must be enrolled in a qualifying high-deductible health plan (HDHP). In 2026, the minimum deductible for a qualifying HDHP is $1,650 for self-only coverage and $3,300 for family coverage. Not all HDHPs are HSA-compatible — verify with your employer or plan provider.

The 2026 contribution limits: $4,300 for self-only coverage, $8,550 for family coverage, with an additional $1,000 catch-up contribution for those 55 and older. Unlike the FSA, HSA balances roll over indefinitely — there is no 'use it or lose it' rule.

The interest rate on HSA cash savings varies by custodian. Fidelity's HSA offers its government money market fund for idle cash (currently 4–5%); Optum Bank pays 0.01–0.10% on cash. Choosing the right HSA custodian is at least as important as choosing the right employer health plan.

After 65, HSA funds can be withdrawn for any purpose (not just medical), subject to ordinary income tax — exactly like a traditional IRA. This makes a fully funded HSA functionally equivalent to a traditional IRA after 65, with the added benefit of tax-free withdrawals for medical expenses at any age.