HSA Calculator: Project Your Health Savings Account Growth and Tax Savings
A Health Savings Account (HSA) is one of the most tax-efficient accounts available in the United States. It offers a rare triple tax advantage: contributions are tax-deductible, the money grows tax-free, and qualified medical withdrawals are also tax-free. This HSA calculator helps you project how your account could grow over time and how much you could save on taxes each year, based on your coverage type, annual contribution, marginal tax rate, expected investment return, and time horizon.
The projection uses a simple, transparent model. Each year your balance earns your expected annual return and then receives your yearly contribution, so the effect of compounding builds up over the years you choose. Because many HSAs let you invest the balance in funds once you pass a cash threshold, treating the account as a long-term investment vehicle rather than a spending account can dramatically increase its value by retirement.
Your annual tax savings are estimated by multiplying your contribution by your marginal tax rate. For example, contributing $4,300 at a 24% marginal rate saves roughly $1,032 in the first year. Over many years those savings add up, and the calculator shows both the yearly figure and the cumulative total alongside your projected balance, total contributions, and investment growth.
The default contribution limits shown here are US IRS annual figures — $4,300 for self-only coverage and $8,550 for family coverage — and they are fully editable because these limits are updated every year and vary by situation (an extra catch-up contribution applies from age 55). Always verify the current limits with the IRS or your plan administrator before relying on any projection. To plan the rest of your finances, explore our 401(k) calculator, retirement calculator, and tax bracket calculator.