HSA HDHP vs PPO Comparison Calculator (2026)

HSA-eligible HDHPs (high-deductible health plans) trade higher deductibles for lower premiums. The Health Savings Account they unlock offers a triple tax advantage no other account matches: pre-tax contributions, tax-free growth, tax-free medical withdrawals. 2026 HSA contribution limits are $4,400 single / $8,750 family with a $1,000 catch-up at 55+.

How The Math Works

Total cost = annual premium + expected medical spend (capped at out-of-pocket max) - HSA tax savings. The HSA tax saving is contribution × marginal tax rate. At a 24% federal marginal rate, a $4,400 HSA contribution saves $1,056 federal tax (more with state). The HDHP usually wins when expected medical spend is low to moderate. The PPO usually wins when medical spend is consistently high or a major procedure is planned in the year.

Why The HSA Tax Triple Matters

Most retirement accounts get two of three tax breaks. Traditional 401k: deduction + tax-free growth, but taxable on withdrawal. Roth IRA: tax-free growth + tax-free withdrawal, but no deduction. HSA: deduction + tax-free growth + tax-free medical withdrawals. After age 65, non-medical withdrawals are taxed like a Traditional IRA (income tax but no 20% penalty), making HSA the stealth retirement account. If you can fund the HSA from cash flow without spending it on current medical costs, invest the balance in low-cost index funds inside the HSA — it compounds tax-free indefinitely. The trick: pay current medical costs out of pocket, save the receipts, and reimburse yourself from the HSA decades later (no time limit on reimbursement).

Last updated May 2026. Sources: IRS Publication 969 (HSAs), Healthcare.gov.