HSA Tax Savings Calculator

This free HSA calculator shows how much a Health Savings Account cuts your tax bill today and how large the balance can grow if you invest it. Enter your annual contribution, marginal tax rate, expected return, and time horizon to get an instant projection. Figures reflect the 2026 IRS contribution limits: $4,400 for self-only coverage and $8,750 for family coverage.

Professional User Guide

1. Immediate Tax Savings

Every dollar you contribute to an HSA reduces your taxable income. If you're in the 24% tax bracket, a $4,000 contribution saves you $960 in federal taxes immediately.

2. Long-Term Growth

Unlike an FSA, HSA funds never expire. By investing your contributions in the stock market and paying for current medical costs out-of-pocket, your HSA can become a powerful secondary retirement account.

How to Use This HSA Calculator

  1. Enter your annual contribution. Include what your employer adds, since it counts toward the same cap. For 2026 the IRS limits are $4,400 for self-only coverage and $8,750 for family coverage, plus a $1,000 catch-up if you are 55 or older. See the full 2026 HSA contribution limits for HDHP eligibility rules.
  2. Set your marginal tax rate. This is the rate on your last dollar of income, not your average rate. Check the 2026 federal tax brackets if you are unsure. You can add your state rate too if your state taxes HSA contributions the same way.
  3. Choose an expected return. Use a lower number if your HSA sits in cash, and a higher one if it is invested in stock funds. Any figure you enter is an assumption, not a guarantee.
  4. Pick your years invested. Enter how long the money will stay in the account before you spend it — often the number of years until retirement.

Results update as you type. The summary cards show your annual tax savings, projected future balance, and total tax saved over the full period, and the chart traces the balance year by year.

Worked Example

Say you contribute $4,400 per year (the 2026 self-only limit), sit in the 24% federal bracket, and invest for 20 years at an example 7% annual return:

  • Annual tax savings: $4,400 × 24% = about $1,056 off your federal tax bill each year.
  • Total tax saved: roughly $21,000 over 20 years — before counting any state tax or payroll-tax savings.
  • Projected balance: about $193,000, of which only $88,000 is your own contributions. The rest is compound growth that is never taxed if spent on qualified medical costs.

These are illustrative numbers, not predictions. The calculator assumes contributions at the start of each year and a constant return; real markets do not move in a straight line.

Common HSA Mistakes to Avoid

Leaving the balance in cash

Many HSA custodians park your money in a low-interest cash account by default. If you plan to hold the account for years, move the balance above your custodian's cash threshold into index funds so it can actually compound.

Spending it as you go

If you can afford to pay medical bills out-of-pocket, do it. Keep the receipts — the IRS lets you reimburse yourself for qualified expenses years later, so the money keeps growing tax-free in the meantime.

Over-contributing

Contributions above the IRS limit trigger a 6% excise tax each year the excess stays in the account. Count employer contributions toward your cap, and watch the limit if you switch between self-only and family coverage mid-year.

Reading results as guarantees

The projected balance is nominal — it is not adjusted for inflation, fees, or years when markets fall. Treat the output as a planning estimate to compare scenarios, not a promise of a specific dollar amount.

Frequently Asked Questions

What are the 2026 HSA contribution limits?

For 2026, HSA contribution limits are $4,400 for self-only HDHP coverage and $8,750 for family coverage, including any employer contributions. Savers age 55 or older can add a $1,000 catch-up contribution.

What is the triple-tax advantage of an HSA?

HSAs offer tax-deductible contributions, tax-deferred growth, and tax-free withdrawals for qualified medical expenses. No other US account type offers all three benefits at once.

Do HSA funds expire at the end of the year?

No. Unlike an FSA, your HSA balance rolls over every year with no deadline to spend it. The account belongs to you, stays with you if you change jobs or health plans, and can be invested for decades.

What happens to my HSA at age 65?

After age 65 you can withdraw HSA money for any purpose without the 20% penalty. Non-medical withdrawals are taxed as ordinary income, like a traditional IRA, while withdrawals for qualified medical expenses remain completely tax-free.

Can I use HSA money for non-medical expenses?

You can, but before age 65 non-medical withdrawals are hit with ordinary income tax plus a 20% penalty. To keep the full tax benefit, spend HSA dollars only on qualified medical expenses such as deductibles, prescriptions, dental, and vision care.