HSA Calculator, Contribution Limits, Tax Savings & Growth Projection

Your HSA

Your age

Current HSA balance

Your annual contribution

Employer contribution

Family HDHP minimum deductible: $3,400 · max out-of-pocket: $17,000 (2026 IRS figures).

Income & taxes

Gross annual income

Filing status

State

California does not conform to the federal HSA tax exemption: your contribution is still taxed at the state level, and investment growth inside the account is taxed annually as ordinary income (not tax-deferred). Both are accounted for below.

Growth assumptions

Expected annual return (%)

Years to grow

Assumes contributions are invested (not spent on current medical expenses) and made monthly (at the end of each month). This calculator does not model ongoing withdrawals for medical spending.

Total tax savings this year

$2,594

Federal $1,925 + FICA $669 + state $0, from contributing $8,750.

These savings assume you are eligible for an HSA (covered by a qualifying high-deductible health plan, with no disqualifying coverage) and contribute through payroll, which avoids income tax and FICA. A contribution you make directly and deduct on your return saves income tax but not FICA.

Projected balance in 20 years

$360,957

$175,000 contributed + $180,957 tax-advantaged growth, on top of your $5,000 starting balance.

Balance at other horizons

In 5 years$57,901

In 10 years$129,867

In 20 years$360,957

In 30 years$788,634

An HSA has three tax advantages: contributions are pre-tax (or deductible), growth is tax-free, and withdrawals for qualified medical expenses are tax-free. After age 65, non-medical withdrawals are taxed as ordinary income (like a traditional IRA) with no penalty, before 65, non-medical withdrawals carry a 20% penalty plus ordinary income tax. This tool does not model your plan's premiums, deductibles or network, HSA custodian fees, or investment sequencing. Planning estimates only, not tax or investment advice.

Share this scenario

Copy your current inputs and send them to a partner, friend, or future self.

Save this scenario

Keep your current inputs so you can come back to them or compare with other saved scenarios. Saves stay in this browser only and will not follow you to another device; use Share to send a link. My scenarios

How this calculator works

Enter your coverage type, contribution amounts, and income. The calculator applies the actual 2026 IRS limits, then computes your real combined tax savings, federal income tax, FICA (Social Security and Medicare), and state income tax, by comparing your tax bill with and without the contribution, the same verified tax engine used across this site's other calculators.

It then projects how your HSA balance could grow over time if invested, accounting for the fact that California and New Jersey tax HSA contributions and annual investment earnings at the state level, unlike every other state.

2026 IRS limits

Self-only, family, and 55+ catch-up contribution limits.

Real tax savings

Federal, FICA, and state, not just a flat estimate.

CA / NJ handling

The only two states that tax HSA contributions and growth.

Growth projection

Balance at 5, 10, 20, and 30 years, plus your custom horizon.

Good to know before you use it

An HSA is the only account with a true triple tax advantage: pre-tax contributions, tax-free growth, and tax-free withdrawals for qualified medical expenses.

Exceeding the contribution limit triggers a 6% excise tax each year the excess remains in the account, unless withdrawn before the tax deadline.

The growth projection assumes contributions are invested rather than spent on current medical expenses, and doesn't model custodian fees or investment sequencing risk.

This calculator is not tax or investment advice.

✓No account or sign-up required

✓Uses your actual marginal tax rate, not a flat estimate

✓Handles CA/NJ HSA non-conformity

Frequently asked questions

What is the HSA contribution limit for 2026?+

$4,400 for self-only HDHP coverage, $8,750 for family coverage, plus a $1,000 catch-up contribution if you're 55 or older.

What is the triple tax advantage of an HSA?+

Contributions are pre-tax, growth is tax-free, and qualified medical withdrawals are tax-free, no other account offers all three.

Do California and New Jersey tax HSA contributions?+

Yes. They're the only two states that don't conform to the federal HSA exemption, contributions are still state-taxed, and earnings are taxed annually as ordinary income rather than growing tax-free.

What if I contribute over the limit?+

Excess contributions face a 6% excise tax each year they remain in the account, unless withdrawn (with earnings) before the tax deadline.

Can I spend HSA money on non-medical expenses?+

Yes, but under 65 you'll owe ordinary income tax plus a 20% penalty. After 65, only ordinary income tax applies, no penalty.

Keep planning your finances

Once your HSA plan is set, see how it fits into your broader retirement and relocation picture.

Sources and limits

Tax figures come from IRS and state government publications (2026 rules, checked October 13, 2026). Written and maintained by Relocation By Numbers. Sources and limits reviewed October 13, 2026. Found a mistake? Tell us in the feedback box below. Full methodology

Sources

Not included

Eligibility (qualifying high-deductible coverage, Medicare enrollment, partial-year coverage) is not checked.
California and New Jersey are modeled as not following the federal HSA exemption; other state details are not modeled.
Wages only: no self-employment, investment, capital-gain or other non-wage income.
Standard deduction only; no itemized deductions, tax credits (dependents, education, earned income and others) or alternative minimum tax.

Was this helpful? What's missing?

Only your answer and message are sent, never your calculator inputs.