HSA Calculator

At the federal level, eligible HSA contributions can be excluded or deducted, account earnings grow tax-deferred, and qualified medical withdrawals are tax-free. Payroll contributions through a qualifying cafeteria plan can also avoid FICA. State treatment is not uniform, so the calculator's combined tax-rate example may not match your state.

Self-only HDHP limit is $4,400 and family HDHP limit is $8,750 (IRS Rev. Proc. 2025-19). Accountholders age 55 and older can add a $1,000 catch-up. The catch-up is per eligible accountholder, so two spouses both 55+ each need their own HSA for two catch-ups.

Yes. You must be covered by an IRS-qualifying HDHP, have no disqualifying coverage (general-purpose FSA, Medicare, or a spouse's non-HDHP that covers you), and not be claimed as a dependent. For 2026 an HDHP needs a minimum deductible of $1,700 self-only / $3,400 family.

A 35-year-old with self-only coverage contributes the full $4,400 each year for 30 years at a 6% return, starting from $0. Projected balance at age 65 is about $347,900. At 30% combined marginal rate, contribution tax savings alone total about $39,600. A taxable brokerage would grow to only about $186,000.

At age 65 the HSA stops behaving like a strict medical account. Qualified medical withdrawals stay tax-free. Non-medical withdrawals no longer trigger the 20% penalty; they are taxed as ordinary income, like a traditional IRA. The HSA then functions like a tax-deferred retirement account on top of its medical benefits.