How much can I save with an HSA? Use this calculator to project your Health Savings Account balance over time, leveraging the triple tax advantage — tax-deductible contributions, tax-free growth, and tax-free withdrawals for qualified medical expenses.
Scenario: Sarah, age 25, contributes the individual max ($4,300/year) with a $1,000 employer contribution. She expects 7% annual return and currently has $2,000 in her HSA. She pays $400/year in medical expenses from the HSA.
Result: By age 65, Sarah's HSA grows to approximately $1.2M, saving over $280,000 in taxes compared to a taxable account.
Scenario: Mike and Lisa, both age 40, contribute the family max ($8,550/year) with a $2,000 employer contribution. They expect 6% annual return and have $15,000 saved. They pay $1,500/year in medical expenses.
Result: By age 65, their HSA grows to approximately $590,000, with over $140,000 in tax savings vs a taxable account.
Scenario: James, age 50, contributes the individual max plus catch-up ($5,150 total in 2025) with no employer match. He expects 6% return and has $8,000 saved. He pays $600/year in medical expenses.
Result: By age 65, James's HSA grows to approximately $183,000, saving over $42,000 in taxes vs a taxable account.
The HSA balance projection uses the future value formula applied year by year:
Yearly Balance = (Previous Balance + Annual Contributions - Medical Expenses) × (1 + Annual Return Rate)
Where:
We estimate the tax savings by comparing the HSA's ending balance against a taxable account with the same contributions, adjusted for:
💡 Key Insight: HSAs are the only accounts with a triple tax advantage — tax-deductible contributions, tax-free growth, and tax-free withdrawals for qualified medical expenses. No other account type (401k, IRA, Roth IRA) offers all three.
When you invest your HSA contributions in stocks, bonds, or mutual funds, all dividends, interest, and capital gains accumulate without being taxed. Over 20-30 years, this tax-free compounding can add hundreds of thousands of dollars to your retirement healthcare fund compared to a taxable brokerage account.
Here's how the three layers of tax benefits compound over time:
Many financial experts recommend maxing out your HSA before contributing to a 401(k) or IRA (beyond any employer match). Why? Because HSAs offer the same tax-deferred growth as a 401(k) plus tax-free withdrawals. After age 65, you can also withdraw funds for non-medical expenses (subject to ordinary income tax), making it function like a traditional IRA with an extra bonus.
This calculator provides estimates for illustrative purposes only and does not constitute financial advice. Actual HSA growth depends on investment performance, fees, contribution limit changes, and individual tax circumstances. HSA contribution limits are set annually by the IRS and may change. Consult a qualified financial advisor or tax professional before making HSA contribution and investment decisions. Past performance does not guarantee future results.