US HSA Calculator (2026)
Project your Health Savings Account balance at retirement using 2026 IRS limits — calculates the triple-tax-advantage value over your working years.
Written by Rahman · Last reviewed
Quick answer
A Health Savings Account is the only US account that is untaxed at all three stages: contributions go in pre-tax, growth is untaxed, and withdrawals for qualified medical expenses are untaxed. You must be enrolled in a high-deductible health plan to contribute. After age 65 you can withdraw for any purpose and pay only ordinary income tax — which makes an unspent HSA behave like a traditional IRA with a medical-expense escape hatch.
Tax savings adds all three legs: $30,000 from deducting contributions, $9,563 in FICA avoided on payroll contributions, and $53,868 of tax never paid on the growth. It assumes withdrawals are for qualified medical expenses and that your marginal rate holds.
2026 HSA limits: $4,400 self-only, $8,750 family, plus $1,000 catch-up at age 55+. HSAs have a "triple tax advantage": contributions are pre-tax, growth is tax-free, and qualified medical withdrawals are tax-free. After age 65 you can withdraw for any purpose, paying only regular income tax — making it effectively a Traditional IRA on top of the medical benefit. Requires enrolment in a High-Deductible Health Plan (HDHP).
Results are estimates for general guidance and are not financial, tax or legal advice. Except where a calculator names a currency, figures carry no currency of their own — put in pounds and you get pounds back, put in rupees and you get rupees. Figures depend on the assumptions you enter and on rates that change over time — check current rates and speak to a qualified adviser before acting on them.
About the US HSA Calculator (2026)
A Health Savings Account (HSA) is uniquely powerful: contributions are pre-tax, growth is tax-free, and qualified medical withdrawals are tax-free. After age 65, you can withdraw for any purpose (paying just regular income tax) — making the HSA function as both medical fund and a stealth retirement account.
For 2026, the IRS limits are $4,400 (self-only HDHP coverage), $8,750 (family HDHP), plus a $1,000 catch-up at age 55+. You must be enrolled in a High-Deductible Health Plan (HDHP) to contribute. This calculator projects what your HSA could grow to by retirement if you invest the contributions (most providers let you invest balances above a minimum).
FV = balance × (1 + r)^n + annual_contrib × ((1 + r)^n − 1) / r
Catch-up contributions ($1,000/year at age 55+) are added automatically in years where you qualify. Tax savings combine all three legs of the advantage: the upfront deduction (contributions × marginal rate), the FICA saved on payroll contributions (contributions × 7.65%), and the tax that growth would otherwise have owed (investment growth × marginal rate).
Sarah is 40 with family HDHP coverage. She contributes the maximum allowed each year — $8,750 before 55, rising to the $9,750 catch-up limit from 55 — starting from a $5,000 balance, at a 7% return, in the 24% federal bracket. By age 65: balance ≈ $614,000, contributions ≈ $228,750 (including $10,000 of catch-up contributions from age 55), and roughly $380,000 of investment growth — more than her contributions combined. Tax savings across all three legs (deduction, FICA, and tax on the growth) total ≈ $163,700: about $54,900 from the deduction, $17,500 from avoided FICA, and $91,300 from growth that would otherwise have been taxed.
The only account taxed favourably at all three stages
Retirement accounts generally give you a tax break at one end or the other. A traditional account deducts the contribution and taxes the withdrawal; a Roth taxes the contribution and exempts the withdrawal. An HSA does both and exempts the growth in between, which is why it is often described as triple tax-advantaged.
Contributions are deductible, investment growth is untaxed, and withdrawals for qualified medical expenses are untaxed. Contributions made through payroll also escape Social Security and Medicare tax, which no IRA or 401(k) contribution does — so a dollar into an HSA through payroll avoids more tax than a dollar into any other account.
- For 2026 the limits are $4,400 for self-only cover and $8,750 for family cover, with a further $1,000 from age 55 — $9,750 for a family contributor over 55.
- Eligibility requires enrolment in a qualifying high-deductible health plan. It is the plan, not the employer or the income, that determines whether you can contribute.
- Contributions must stop once you enrol in Medicare, and enrolment can be backdated, which catches people who work past 65.
Most balances are spent rather than invested
The projection above assumes the balance is invested and left to compound. In practice a large share of HSA money sits in cash and is spent within the year, which turns a long-term investment account into a slightly tax-efficient current account and forfeits the part that matters.
The difference is the whole case for the account. Contributing $4,400 a year and investing it at 7% for thirty years reaches around $430,000 on $132,000 of contributions — roughly $298,000 of untaxed growth that spending each year's balance would never produce.
- Many providers require a minimum cash balance before the investment option unlocks, and it is usually opt-in rather than automatic.
- Qualified expenses can be reimbursed at any point in the future, with no deadline. Paying medical costs from other funds and keeping the receipts lets the balance stay invested while preserving the right to withdraw tax-free later.
- After 65, non-medical withdrawals are permitted without penalty but are taxed as income, which makes the account behave like a traditional IRA at worst.
Limits are set annually by the IRS. The figures here are for 2026 and this calculator is refreshed each year.
2026 HSA contribution limits
| Coverage | Under 55 | Age 55+ (with catch-up) |
|---|---|---|
| Self-only HDHP | $4,400 | $5,400 |
| Family HDHP | $8,750 | $9,750 |
| Both spouses 55+ (family) | $8,750 + 2 × $1,000 | $10,750 |
Each spouse over 55 can contribute their own catch-up — but the second spouse's catch-up must go into a separate HSA in their own name.
Frequently Asked Questions
What is the "triple tax advantage"?
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(1) Contributions reduce your federal taxable income (and most state income too). (2) Investment growth inside the account is tax-free. (3) Withdrawals for qualified medical expenses are tax-free. No other account combines all three.
Do I have to spend the money each year?
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No — HSA balances roll over indefinitely. This is the key difference from FSAs (Flexible Spending Accounts), where unused funds typically expire at year-end.
What counts as a qualified medical expense?
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IRS Publication 502 lists hundreds of items: doctor visits, prescriptions, dental, vision, mental health, certain over-the-counter medications, Medicare premiums after 65, long-term care insurance (with limits). Cosmetic surgery and gym memberships generally do not qualify.
What happens after I turn 65?
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You can withdraw for any purpose, paying only ordinary income tax (like a Traditional IRA). Qualified medical withdrawals remain tax-free at any age. The 20% penalty for non-medical withdrawals disappears at 65.
Can I invest my HSA balance?
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Most HSA providers allow investments once you exceed a minimum cash balance (often $1,000-$2,500). The investment menu varies by provider; Fidelity and Lively are often recommended for low-cost index fund access.
Sources
- IRS Revenue Procedure 2025-19 — 2026 HSA inflation adjustments — Official 2026 HSA contribution limits for self-only and family HDHP coverage.