HSA contribution & tax savings calculator
A Health Savings Account is the only account with a triple tax advantage: contributions are deductible, growth is tax-free, and qualified withdrawals are tax-free too. See exactly how much a given contribution saves you in federal tax, state tax, and (if it goes in through payroll) FICA.
Federal tax savings
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State tax savings
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FICA savings (payroll only)
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Total tax savings
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Last updated: September 2026 · Verified by Hugo Cardozo. 2026 IRS HSA contribution limits: $4,400 self-only coverage, $8,750 family coverage, plus a $1,000 catch-up at age 55+ (Rev. Proc. 2025-19).
Why an HSA is called a "triple tax advantage" account
A traditional 401(k) or IRA only gets you one side of the tax break — either the contribution or the withdrawal is untaxed, not both. An HSA is different: contributions reduce your taxable income now, the balance grows tax-free, and withdrawals for qualified medical expenses are never taxed at all, at any point. No other common account offers all three.
What this calculator actually adds up
A contribution's real value isn't just the deduction — if it's made through payroll (a Section 125 cafeteria plan), it also skips the 7.65% FICA tax (Social Security and Medicare) that applies to regular paycheck income, something even a Traditional 401(k) or IRA contribution doesn't avoid. This calculator totals the federal income tax, state income tax, and — only if made through payroll — FICA savings from a given contribution amount.
Worked example
Contributing $4,400/year (the 2026 self-only limit) through payroll, at a 22% federal marginal rate and a 5% state rate: federal tax savings of about $968, state tax savings of about $220, and FICA savings of about $337 — a total of roughly $1,525 in combined tax savings, or about 34.7% of the contribution itself effectively coming from reduced taxes rather than take-home pay.
Why payroll contributions save more than a tax-return deduction
Contributing directly to an HSA and claiming the deduction on your tax return still saves the federal and state tax shown here, but it misses the FICA savings — FICA is only avoided when the money is diverted before it ever hits your paycheck through an employer's cafeteria plan. If your employer offers payroll HSA contributions, routing money that way instead of contributing on your own after paycheck typically comes out ahead by exactly the FICA percentage.
This is separate from any employer contribution
Employer HSA contributions are already excluded from your taxable income before you ever see them, so they don't generate any of the savings calculated here — this tool is specifically about the value of the tax treatment on the portion you contribute yourself.
Frequently asked questions
Do I need a high-deductible health plan to contribute to an HSA?
Yes — HSA eligibility requires enrollment in an IRS-qualifying high-deductible health plan (HDHP) and no other disqualifying coverage. Without an eligible HDHP, you generally can't open or contribute to an HSA.
What happens to unused HSA funds at year-end?
Unlike a Flexible Spending Account (FSA), HSA balances never expire and there's no "use it or lose it" rule — the full balance rolls over every year and stays yours even if you change employers or health plans.
Are HSA withdrawals ever taxed?
Only if used for non-qualified expenses before age 65, in which case the withdrawal is taxed as ordinary income plus a 20% penalty. After age 65, non-qualified withdrawals are taxed as ordinary income but the penalty no longer applies — functioning much like a Traditional IRA at that point, while qualified medical withdrawals stay tax-free at any age.
📘 Related guide
Read the full guide: "The HSA Triple Tax Advantage: What Your Contribution Really Saves You".
The HSA Triple Tax Advantage: What Your Contribution Really Saves You