Annual Tax Savings
$720.00
US Health Savings Account Calculator
Estimate tax savings and growth of HSA contributions.
Projected HSA Balance
$50,311.57
Total Annual Contribution
$4,000.00
Total Contributed
$40,000.00
Total Tax Savings
$7,200.00
HSA contributions are pre-tax (or tax-deductible), grow tax-free, and withdrawals for qualified medical expenses are tax-free.
How to use the US Health Savings Account Calculator
The US Health Savings Account Calculator is free and runs entirely in your browser — no sign-up, and nothing you enter leaves your device. It opens pre-filled with a realistic example, so you can see how it works before replacing any figure with your own; the results update as you type. Press Calculate to refresh the result panel, or Reset to return to the example.
The inputs it asks for:
- Your Annual Contribution — a dollar amount.
- Employer Contribution — a dollar amount.
- Marginal Tax Rate — a percentage (enter 6 for 6%).
- Expected Annual Return — a percentage (enter 6 for 6%).
- Years — a number.
The formula
It values an HSA's twin benefits separately. The tax saving is your contribution times your marginal rate — the money you don't hand over in tax. The balance is the future value of each year's total contribution, yours plus the employer's, compounded at your return:
Annual tax saving = Your contribution × tax rate
Balance = Total annual · ((1 + r)^years − 1) / r- Total annual
- your contribution + the employer's contribution
- r
- the expected annual return
- years
- the number of years you contribute
An HSA is triple tax-advantaged — contributions are pre-tax, growth is untaxed, and withdrawals for qualified medical expenses are tax-free. This models a level annual contribution; it doesn't add a starting balance or enforce the annual IRS contribution limit.
Worked example
Using the example values — Your Annual Contribution $3,000.00, Employer Contribution $1,000.00, Marginal Tax Rate 24%, Expected Annual Return 5%, Years 10 — the US Health Savings Account Calculator returns a Projected HSA Balance of $50,311.57. It also reports Annual Tax Savings ($720.00), Total Annual Contribution ($4,000.00), Total Contributed ($40,000.00).
Prefer your own numbers? Change any field above and this recomputes instantly.
Key terms
- HSA (Health Savings Account)
- A tax-advantaged account for medical costs, paired with a qualifying high-deductible health plan.
- Triple tax advantage
- Pre-tax contributions, tax-free growth, and tax-free qualified withdrawals.
- Marginal tax rate
- The rate your contribution saves you up front.
- Qualified medical expense
- A cost the IRS lets you pay from an HSA tax-free.
Frequently asked questions
Why is an HSA called triple-tax-advantaged?
Three breaks in one account: you contribute pre-tax, the balance grows untaxed, and withdrawals for qualified medical costs are tax-free — a combination no other account offers.
Can I invest the balance?
Many HSAs let you invest above a cash threshold, which is what makes the long-run growth here realistic. Unused funds roll over every year, unlike an FSA.
What if I use it for non-medical costs?
Before 65, non-qualified withdrawals are taxed and penalized; after 65 they're taxed like an IRA. This projection assumes qualified use.