HSA Contribution Calculator
Your maximum HSA contribution this year — and the income tax it shelters. Triple-tax-advantaged, and one of the best shelters for the self-employed with a high-deductible plan. It requires an HDHP and does not reduce self-employment tax.
Written by Dorothy Ibrahim, 10+ years in banking & finance
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How we calculate this
This calculator finds your maximum Health Savings Account (HSA) contribution for the year and the income tax that contribution shelters. An HSA is triple-tax-advantaged — deductible going in, tax-free growth, and tax-free withdrawals for qualified medical costs — which makes it one of the strongest shelters available to a self-employed person with a high-deductible health plan. Enter your coverage type, age, net profit, filing status, and tax year to see your limit, the age-55 catch-up if it applies, and the income tax you save. The saving is valued at your income-tax bracket because, for the self-employed, the HSA deduction reduces income tax only — not self-employment tax.
The formulas
- HSA contribution limit
- base limit for your coverage (self-only or family) + $1,000 catch-up if age 55+Base limits are the annual IRS inflation-adjusted amounts for the tax year.
- Income tax sheltered
- contribution limit × your marginal income-tax rateIncome-tax rate only — the self-employed HSA deduction does not reduce self-employment tax.
Worked example
- With the defaults — self-only coverage, age 40, $100,000 net profit, single, 2026 — the self-only HSA limit is $4,400. You are under 55, so there is no $1,000 catch-up.
- Your marginal income-tax rate at this profit is 22%, so the contribution shelters $4,400 × 22% = $968 in federal income tax.
- That is roughly $367 per month if funded evenly. A 55-year-old with family coverage would instead see the higher family limit plus a $1,000 catch-up on top.
Rates, benchmarks & sources
- HSAs and Other Tax-Favored Health Plans — eligibility, limits, and the HDHP requirement. — IRS Publication 969
- Inflation-adjusted self-only and family HSA contribution limits for the tax year. — IRS Rev. Proc. (annual HSA amounts)
- Health Savings Accounts — where the self-employed HSA deduction is reported. — IRS Form 8889
- 2026 federal income-tax brackets used for the marginal-rate saving. — IRS Rev. Proc. 2025-32
Figures current as of 2026-07-02. See our methodology & editorial standards for how constants are versioned and verified.
What this tool doesn’t model
- You must have an HSA-eligible high-deductible health plan (HDHP) to contribute — the tool assumes you do; it does not verify plan eligibility.
- For the self-employed, the HSA deduction is above-the-line income relief only — it lowers income tax and AGI, not self-employment (Social Security and Medicare) tax.
- It assumes coverage for the full year; mid-year eligibility changes trigger the last-month rule or a proration this estimate does not model.
- It assumes a sole proprietor taking the standard deduction, so the marginal-rate saving is an approximation of your true bracket.
- It is an educational estimate for planning, not tax advice — confirm your contribution and eligibility with a CPA/EA.
Frequently asked questions
What is the HSA contribution limit?
It depends on your coverage: a lower limit for self-only coverage and a higher one for family coverage, plus a $1,000 catch-up if you are 55 or older. For 2026 the self-only limit is $4,400. This calculator applies the current-year limits automatically. You must have an HSA-eligible high-deductible health plan to contribute at all.
Why is an HSA called triple-tax-advantaged?
Contributions are deductible (or pre-tax), the balance grows tax-free, and withdrawals for qualified medical expenses are tax-free. No other account offers all three at once. After age 65 you can also withdraw for any purpose, paying only ordinary income tax, which makes an HSA behave like a traditional IRA with a medical-spending bonus.
Does an HSA reduce my self-employment tax?
No. For the self-employed, the HSA deduction is an above-the-line income deduction — it lowers income tax and AGI, not self-employment tax. Employees who contribute through payroll can avoid FICA on the amount, but that route is not available to a sole proprietor, so the tool values the saving at your income-tax bracket only.
Can I have an HSA and a Solo 401(k)?
Yes. An HSA stacks on top of retirement accounts. Many self-employed savers use a Solo 401(k) or SEP for retirement, an IRA on top, and an HSA for the triple tax advantage. The accounts are independent, so contributing to one does not reduce what you can put in another.
Do I have to spend the money on medical costs each year?
No. Unlike a Flexible Spending Account, HSA balances roll over indefinitely and stay yours. Many savers pay current medical costs out of pocket and let the HSA grow invested for decades, then reimburse themselves later or use it tax-free for medical costs in retirement.