Federal, state and (via payroll) FICA all dodge the contribution. Tax-free growth. Tax-free out for medical. Anything-goes at 65. The most leveraged US savings account most people underuse.
37% effective rate (fed + state + FICA)
Material savings at your bracket. The FV at 65 is the headline number to watch: at high marginal rates plus FICA plus state, the HSA effectively functions as a Roth IRA on steroids with no required distributions and no penalty for medical at any age.
2025 IRS limits embedded: $4,300 self / $8,550 family + $1,000 catch-up at 55+. California, New Jersey and a few other states don't conform to federal HSA treatment for state taxes; contributions still get federal + FICA savings but you pay state income tax on the contribution and growth.
Worth surfaces unused HSA room alongside 401(k), Backdoor and Mega Backdoor, the right contribution sequence for your marginal rate. Join the waitlist.
Invest if you can afford to pay current medical out of pocket. Compounded for 25-30 years, the future value is many times what you'd save by spending the HSA on current bills. Save the medical receipts; there's no time limit on reimbursement, so you can pull the money out tax-free decades later.
California, New Jersey, and a few other states don't conform to federal HSA tax treatment for state taxes. Contributions still get federal and FICA savings, but you pay state income tax on the contribution and on the growth. Still worth it federally, just less of a no-brainer than in conforming states.
You can keep the HSA forever and continue using it for medical. You just can't contribute new money in years you're not on HDHP coverage. The existing balance keeps growing tax-free indefinitely.