Health calculator

HSA Contribution Calculator, Tax Savings & Investment Growth

Calculate your HSA contribution limit, annual tax savings, and long-term investment growth. See how the HSA triple tax advantage compounds over time.

According to the U.S. Internal Revenue Service and the National Institute of Standards and Technology, more than 1,000 published rate, threshold, and conversion reference values update annually across tax, mortgage, and engineering domains that CalcMesh formulas trace to. The CalcMesh registry listed 53 calculators across 9 categories as of August 2026. See our methodology for derivation standards and refresh cadence.

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years
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2026 limits: $4,400 self-only / $8,750 family

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Many employers contribute $250-1,000/year

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Amount you pay out-of-pocket (not from HSA)

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Federal + state marginal tax rate

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Annual investment return if funds are invested

2026 Max Contribution

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IRS limit for you

Annual Tax Savings

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Federal + state

Balance at 65

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If invested, unused

Lifetime Tax Saved

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30-year estimate

Growth Milestones

How CalcMesh projects a Health Savings Account

A Health Savings Account pairs with a qualifying high-deductible health plan and offers triple tax advantages. According to IRS Revenue Procedure 2025-19, the 2026 contribution limit is $4,400 for self-only coverage and $8,750 for family coverage, with a $1,000 catch-up at age 55.

We project tax-free growth of contributions to retirement; the limits and assumptions we use are listed in our methodology.

2026 HSA Limits

Coverage Contribution Limit Age 55+ Catch-Up
Self-only$4,400$5,400
Family$8,750$9,750

HSA vs FSA, Key Differences

  • HSA rolls over forever. FSA has a "use it or lose it" provision (up to $660 grace/rollover).
  • HSA is portable. It follows you when you change jobs. FSA typically does not.
  • HSA can be invested. FSA cannot (cash only).
  • HSA requires HDHP. FSA works with most plans.
  • FSA funds available immediately. HSA funds must be contributed first.

Related Data

Compare health plan availability by state at HealthCare.gov marketplace. See insurance market statistics at HealthCare.gov.

Disclaimer: HSA rules and limits change annually. Verify current limits at IRS.gov. Tax savings depend on your specific situation and state tax treatment.

After you project the balance

What to do with the numbers

  • Confirm your plan is actually HSA-eligible (a qualifying HDHP) before maxing the contribution shown here - an HSA requires the high-deductible plan, unlike an FSA which works with most plans.
  • If you are 55 or older, re-run the projection with the catch-up added - the table above shows it adds $1,000 to either limit, meaningfully changing the long-run tax-free growth.
  • Because HSA funds roll over forever and are portable across jobs (unlike an FSA's use-it-or-lose-it rule), treat unused contributions as a long-term investment account, not a spend-it-this-year fund.
  • Compare this projection against your FSA option side by side using the differences list above, if you expect predictable near-term medical costs and no HDHP, FSA's immediate fund availability may fit better.

Methodology & Assumptions

This compounding tool projects balances on the schedule and return assumption you enter. Contribution timing dominates the path; fees and tax treatment are not invented—see defaults in the table.

How this growth node runs

Balances compound on the stated schedule (usually monthly). Contribution timing and the return assumption dominate the path - fees and taxes are not invented. Published domain formulas govern the identities; when an agency updates rates or thresholds we refresh defaults and the page lastmod.

Frequently Asked Questions

What is a triple tax advantage?
HSAs offer three tax benefits: (1) Contributions are tax-deductible (reduce your taxable income). (2) Money grows tax-free (dividends, capital gains untaxed in the account). (3) Withdrawals are tax-free for qualified medical expenses. No other account in the US tax code offers all three benefits.
What can HSA money be used for?
Qualified medical expenses: doctor visits, prescriptions, dental, vision, surgery, mental health, long-term care premiums, COBRA premiums, and Medicare premiums after 65. After 65, you can withdraw for any purpose (taxed like traditional IRA but no 10% penalty). Before 65, non-medical withdrawals face income tax + 20% penalty.
Can I invest my HSA money?
Yes, this is the HSA's secret superpower. Once you build a small cash buffer (typically $1,000-2,000), invest the rest in low-cost index funds. Many experts recommend paying medical expenses out-of-pocket while young and letting the HSA compound for decades, then using it for healthcare in retirement (when medical costs peak).
What happens to unused HSA money?
HSA funds roll over forever, there's no "use it or lose it" rule (unlike FSAs). Unused money grows tax-free year after year. At 65, it becomes like a traditional IRA that can also be used tax-free for medical expenses. A maxed-out HSA invested over 30 years at 7% can grow to $500,000+.

This page identifies the inputs, method, and limitations behind its estimates. CalcMesh does not publish lender, insurer, provider, or plan fee schedules. Any monetary output is calculated from the inputs shown on the page, not a current quote. Compare a fee, rate, or term with the governing agreement or disclosure before a consequential decision. Calculator outputs are not professional advice. Growth projections here compound only the balance, contribution, and return assumptions you supply. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.

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Cross the mesh from HSA Contribution Calculator

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Inputs, defaults, and authoritative sources
Input Default Source / authority
Balance, contribution, return Stated compounding frequency Compound-interest identity