HSA Calculator 2026
Triple tax advantage: deductible in, tax-free growth, tax-free out for qualified medical
Last updated: November 2025 · Source: IRS Rev. Proc. 2025-19. 2026 limits: $4,400 self / $8,750 family / +$1,000 at 55+
HSA Inputs
Annual: $3,600
Annual: $600
CA, NJ tax HSA contributions; most states do not
Also saves 7.65% FICA
The HSA Triple Tax Advantage
HSA Growth Projection
Summary
Understanding HSAs in 2026
2026 Limits (Rev. Proc. 2025-19)
The 2026 HSA contribution limit is $4,400 for self-only HDHP coverage and $8,750 for family coverage. Account holders age 55 or older may add a $1,000 catch-up. The combined employee + employer contribution may not exceed these limits. To be HSA-eligible, the underlying HDHP must have a minimum deductible of $1,700 self / $3,400 family and out-of-pocket maximums no greater than $8,500 / $17,000.
The HSA as a Stealth IRA
The HSA is the only account in the U.S. tax code with a true triple tax advantage. A 30-year-old who maxes the family HSA every year ($8,750 in 2026, indexed) and invests it at 7% can accumulate over $1 million by age 65, all tax-free if used for qualified medical care. Many savvy savers pay current medical bills out-of-pocket, save the receipts, and reimburse themselves decades later from the grown HSA balance, harvesting decades of tax-free growth.
After 65: HSA Becomes Like a Traditional IRA
Once you turn 65, the 20% penalty on non-qualified HSA withdrawals disappears. You can withdraw HSA funds for any reason and pay only ordinary income tax, just like a Traditional IRA. Qualified medical withdrawals remain tax-free at any age, and after 65 the list expands to include Medicare Parts B, D, and Medicare Advantage premiums (but not Medigap).
Payroll vs. Direct Contributions
Contributions made through your employer's cafeteria plan (Section 125) avoid federal income tax, state income tax (most states), AND the 7.65% FICA payroll tax. Direct contributions you make from a personal bank account are deductible above-the-line on Form 8889 but do NOT save FICA. If your employer offers a payroll deduction option, use it.
Frequently Asked Questions
What are the 2026 HSA contribution limits?
Per IRS Rev. Proc. 2025-19, the 2026 HSA contribution limits are $4,400 for self-only HDHP coverage and $8,750 for family coverage. Account holders 55+ may add a $1,000 catch-up. Combined employee + employer cannot exceed these caps.
Who is eligible to contribute to an HSA?
You must be covered by an HSA-qualified High-Deductible Health Plan (HDHP). For 2026 that means a minimum deductible of $1,700 self / $3,400 family, with out-of-pocket maxes capped at $8,500 / $17,000. You cannot be enrolled in Medicare, claimed as a dependent, or have other disqualifying coverage.
What counts as a qualified medical expense?
Doctor visits, prescriptions, dental and vision care, mental health, COBRA premiums, Medicare premiums after 65, long-term care insurance (age-limited), and items in IRS Pub. 502. The CARES Act added OTC medicines and menstrual products. Cosmetic and general wellness items do NOT qualify.
What changes at age 65?
Once on Medicare you can no longer contribute to an HSA, but you can still spend the balance. After 65 the 20% penalty on non-qualified withdrawals disappears, non-medical withdrawals are simply taxed as ordinary income (like a Traditional IRA). Qualified medical withdrawals stay tax-free at any age.
Can I invest my HSA balance?
Yes. Most HSA custodians (Fidelity, Lively, HealthEquity) let you invest balances above a small minimum in mutual funds or ETFs. Invested HSA dollars grow tax-free, making the HSA the most tax-advantaged retirement vehicle when paired with qualified medical spending.
HSA vs FSA, what is the difference?
An HSA requires HDHP coverage, has higher limits, rolls over indefinitely, is portable across jobs, and can be invested. A Health FSA has lower limits, a use-it-or-lose-it rule, is not portable, and cannot be invested. HSA usually wins if you qualify.