🏥 HSA Contribution & Growth Calculator

See your 2026 HSA contribution limit, annual tax savings, and how much your account could grow with triple-tax-advantaged investing.

Coverage Type

Your Annual Contribution ($)

Age 55+ Catch-Up Contribution

Marginal Tax Rate — Federal + State (%)

Years to Invest

Expected Annual Return (%)

2026 IRS limits (Rev. Proc. 2025-19): Self-only $4,400 · Family $8,750 · Age 55+ catch-up +$1,000.

Projected Balance

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2026 Limit (Selected Coverage) — Annual Tax Savings — Total Contributions — Total Tax Saved — Investment Growth —

Year-by-Year HSA Growth

Year	Contribution	Balance	Cumulative Tax Saved

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What Is a Health Savings Account (HSA)?

An HSA is a tax-advantaged savings account available to people enrolled in a qualifying high-deductible health plan (HDHP). It is often called "triple-tax-advantaged" because contributions are tax-deductible (or pre-tax through payroll), the account grows tax-free, and withdrawals for qualified medical expenses are also tax-free. Unlike a Flexible Spending Account (FSA), HSA balances roll over year to year and remain yours even if you change jobs or health plans, making it a powerful long-term savings vehicle in addition to a way to pay near-term medical bills.

2026 IRS Contribution Limits

For 2026, the IRS (Rev. Proc. 2025-19) sets the annual HSA contribution limit at $4,400 for self-only coverage and $8,750 for family coverage. Individuals age 55 or older by the end of the tax year can contribute an additional $1,000 catch-up amount on top of the standard limit. These limits are adjusted annually for inflation, so it is worth checking the current-year limit each January before setting your payroll contribution elections.

How Contribution Limits Affect Your Tax Savings

Every dollar you contribute to an HSA (up to the limit) reduces your taxable income by that same dollar, whether you contribute through payroll deduction or directly and claim the deduction on your tax return. At a combined federal and state marginal tax rate of 24%, contributing the full $8,750 family limit saves $2,100 in taxes in that year alone — money you would otherwise pay to the IRS and your state. This calculator multiplies your contribution by your marginal rate to show that immediate annual tax savings.

Long-Term Growth: HSA as a Retirement Vehicle

Because unused HSA funds roll over indefinitely and can be invested in mutual funds or ETFs much like a 401(k), many financial planners recommend treating an HSA as a stealth retirement account: pay current medical bills out of pocket when possible, and let the HSA balance compound tax-free for decades. This calculator projects that growth using a standard future-value-of-annuity calculation, assuming you contribute the same amount at the end of each year and it compounds at your expected annual return.

Using HSA Funds After Age 65

After age 65, HSA withdrawals for non-medical expenses are taxed as ordinary income (similar to a traditional IRA) but no longer incur the 20% early-withdrawal penalty that applies before 65. Withdrawals for qualified medical expenses, including many Medicare premiums, remain completely tax-free at any age. This flexibility is part of why the HSA is considered one of the most efficient long-term savings accounts available to U.S. taxpayers.

HDHP Eligibility and Coordination With Other Accounts

To contribute to an HSA, you must be enrolled in a qualifying high-deductible health plan and have no other disqualifying coverage (such as a general-purpose FSA or Medicare). Contribution limits are per HSA-eligible individual, but a family HDHP limit can be split between two spouses' HSAs however they choose, as long as the combined total does not exceed the family limit (plus any individual catch-up amounts, which must go into each spouse's own HSA).

Building a Complete Tax-Advantaged Savings Strategy

An HSA works well alongside other tax-advantaged accounts like a 401(k) or 529 plan (see our 529 college savings calculator) as part of a broader financial plan. Many households prioritize contributing enough to a 401(k) to capture any employer match, then max out HSA contributions for the immediate tax deduction and long-term tax-free growth, before allocating additional savings elsewhere.

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What is the 2026 HSA contribution limit?

For 2026, the IRS limit is $4,400 for self-only coverage and $8,750 for family coverage, per Rev. Proc. 2025-19. Those age 55 or older can add an extra $1,000 catch-up contribution.

What happens if I contribute more than the limit?

Excess contributions are subject to a 6% excise tax each year they remain in the account, unless you withdraw the excess (plus any earnings on it) before your tax filing deadline. This calculator will warn you if your entered contribution exceeds the applicable limit.

Can I invest my HSA funds?

Most HSA providers allow you to invest funds above a certain cash threshold in mutual funds, index funds, or similar options, similar to a 401(k) or IRA. This calculator assumes your full contribution is invested and grows at your expected annual return.

Do HSA funds expire?

No. Unlike a Flexible Spending Account (FSA), HSA balances roll over indefinitely and remain yours even if you change employers or health plans.

Are HSA withdrawals always tax-free?

Withdrawals for qualified medical expenses are always tax-free at any age. After age 65, non-medical withdrawals are taxed as ordinary income but avoid the 20% penalty that applies to non-medical withdrawals before age 65.

Is this calculator financial or tax advice?

No. This tool provides general estimates for educational purposes only and is not tax or financial advice. Contribution limits, tax rates, and investment returns can change; consult a qualified tax professional or financial advisor for guidance specific to your situation.