HSA Savings Calculator
An HSA is the only triple-tax-advantaged account in the US: contributions are pre-tax, growth is tax-free, and qualified withdrawals are tax-free. This calculator shows your annual tax savings and projected balance if you invest your HSA.
Educational estimate. Calculator results are for planning and information only, not financial, tax, medical, legal, or engineering advice. Verify important decisions with official sources or a qualified professional.
HSA Savings Calculator
Health Savings Account Growth & Tax Benefit
📐 Formula & Method
HSA Tax Savings
HSA contributions avoid federal income tax, FICA (7.65%), and most state income taxes. Invested HSA funds grow tax-free.
📋 How to Use
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1
Enter your planned annual HSA contribution.
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2
Select your marginal tax rate and state tax rate.
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3
Set investment horizon and expected return.
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4
See annual tax savings and projected balance.
The Triple Tax Advantage of an HSA
Contributions reduce your taxable income (pre-tax through payroll or tax-deductible if contributed directly). The balance grows tax-free when invested. Withdrawals for qualified medical expenses are completely tax-free. After age 65, you can withdraw for any reason and pay only ordinary income tax — making an HSA function like a Traditional IRA with a medical bonus.
2024 contribution limits are $4,150 for self-only HDHP coverage and $8,300 for family coverage. Account holders aged 55 and older can contribute an additional $1,000 catch-up contribution.
🔬 Methodology & Accuracy
Formula: Uses the standard mathematical formula shown in the Formula & Method section above. All computations run client-side in your browser — no data is sent to our servers.
Data sources: Tax bands, contribution limits and regulatory rates are taken from official US (IRS, SSA) and UK (HMRC, gov.uk) publications for the current tax year, and updated when bands change.
Last reviewed: January 2025 · Accuracy: Results are precise to two decimal places using IEEE-754 double-precision arithmetic. Intended for educational and planning use only.
For informational purposes only. Results are estimates based on the inputs and formulas provided. For financial, tax, medical, or legal decisions, consult a qualified professional. Rates and regulations change — always verify current figures with official sources.