See exactly how much federal tax, FICA, and state tax you save by contributing to a Health Savings Account — plus what it could grow to, tax-free.
Contribute through payroll and an HSA skips federal income tax, Social Security, and Medicare — not just income tax like a 401(k). Growth inside the account is tax-free, and withdrawals for qualified medical expenses are never taxed. Enter your numbers below to see your real savings.
Employer money, mid-year starts and a spouse's contributions all count against the same IRS limit. Enter what applies to you to see your real remaining room.
| Your 2026 limit | $4,400 |
| Employer contributions | −$0 |
| Your contributions so far | −$0 |
| Room left | $4,400 |
Monthly proration and last-month rule per IRS Publication 969. Doesn't model switching between self-only and family mid-year.
2026 federal limits: $4,400 self-only / $8,750 family + $1,000 catch-up age 55+ (IRS Rev. Proc. 2025-19). California and New Jersey do not conform to federal HSA tax treatment — see below if either is selected.
Your HSA contribution is not deductible on your state return, and any interest, dividends, or investment growth inside the account is taxed as state income every year (FTB Publication 1005). You still get the federal tax deduction and FICA savings below — just not the state-level benefit.
| Annual HSA Contribution | $0 |
| Federal Income Tax Saved | $0 |
| FICA Saved (Social Security + Medicare) | $0 |
| ↳ Social Security (6.2%) | $0 |
| ↳ Medicare (1.45%) | $0 |
| State Income Tax Saved | $0 |
| Total Tax Saved | $0 |
| Real Cost (take-home reduction) | $0 |
Assumes this same contribution every year, invested for growth. This is a simplified estimate, not a guarantee — real returns vary year to year.
For most people with a qualifying high-deductible health plan, yes. An HSA is the only account with a triple tax advantage: contributions are pre-tax (or deductible), growth is tax-free, and withdrawals for qualified medical expenses are never taxed. No other retirement or savings account gets all three. The main tradeoff is the high-deductible plan itself — make sure you can cover that deductible out of pocket before prioritizing HSA contributions over something like an employer 401(k) match.
The federal tax benefits still apply in California, but California (along with New Jersey) does not conform to federal HSA law: your contributions are not deductible on your California state return, and any interest, dividends, or capital gains your HSA earns are taxed every year as California income (FTB Publication 1005). You still get the federal income tax deduction and the FICA savings if you contribute through payroll — you just lose the state-level benefit that residents of most other states get for free. Select California above to see the exact dollar impact.
Yes, but only if you contribute through your employer's payroll (a Section 125 cafeteria plan), which is how most employer-sponsored HSA contributions work. Payroll HSA contributions skip federal income tax, Social Security tax (6.2%), and Medicare tax (1.45%) — all three. If you instead contribute directly to your HSA outside of payroll and deduct it on your tax return, you still get the federal (and most states') income tax deduction, but you do not get the FICA savings, since FICA was already withheld before the money reached you. A 401(k) never gets this FICA break, pre-tax or not.
An HSA is tax-free in three separate ways: (1) contributions reduce your taxable income going in — pre-tax through payroll, or deductible if made directly, (2) any interest, dividends, or investment growth inside the account is never taxed, and (3) withdrawals are completely tax-free as long as they're used for qualified medical expenses. Combined with the FICA savings on payroll contributions, it's the most tax-advantaged account available to most workers.
For 2026, the IRS limit is $4,400 for self-only coverage and $8,750 for family coverage. If you're 55 or older by the end of the year, you can add a $1,000 catch-up contribution on top of either limit ($5,400 self-only, $9,750 family) — this catch-up amount is fixed by law and hasn't changed since 2009. Each spouse who is 55+ and HSA-eligible can add their own $1,000 catch-up, but it must go into their own HSA, not a shared account.
If you can afford it, maxing out your HSA ($4,400 self-only / $8,750 family for 2026) is usually a strong move, since it's the only account that avoids income tax, FICA, and future taxes on growth all at once. A common order of priorities: contribute enough to your 401(k) to get your full employer match first (free money), then max your HSA, then go back to maxing your 401(k)/IRA. If money is tight, even contributing enough to cover your expected annual medical costs is worthwhile for the tax savings alone.
An HSA requires a high-deductible health plan, rolls over and stays with you forever (even if you change jobs), can be invested for tax-free growth, and has no "use it or lose it" deadline. An FSA (Flexible Spending Account) doesn't require a high-deductible plan, is owned by your employer (you lose unused funds if you leave), typically must be spent within the plan year (sometimes with a small grace period or carryover), and cannot be invested. You cannot have both a full HSA and a full FSA at the same time, though a "limited purpose" FSA (dental/vision only) can be paired with an HSA.
Before age 65, a non-medical HSA withdrawal is taxed as ordinary income plus a 20% penalty — the steepest penalty of any tax-advantaged account. After age 65, the 20% penalty goes away; a non-medical withdrawal is simply taxed as ordinary income, the same as a traditional 401(k) or IRA withdrawal. Withdrawals for qualified medical expenses are always tax-free and penalty-free, at any age.
Not anymore. Starting January 1, 2026, IRS Notice 2026-5 (issued under the One Big Beautiful Bill Act) made ACA Marketplace bronze and catastrophic plans HSA-eligible — including off-exchange versions of the same plans, though not small-business SHOP plans — even though they don't meet the usual high-deductible requirements. Many bronze and catastrophic plans didn't meet the old HDHP rules, so this opens HSA access to people on some of the cheapest coverage available. You still need some form of qualifying health coverage (and no disqualifying coverage like a general-purpose FSA or Medicare), but it no longer has to be a traditional high-deductible plan.
Yes. Everything that goes into your HSA for the year counts toward the same IRS limit: your own payroll contributions, direct deposits, and any seed money or match from your employer. For 2026, if you have self-only coverage and your employer puts in $1,000, you can add only $3,400 yourself to stay within the $4,400 limit. Family coverage works the same way against the $8,750 limit.
Your limit is prorated by month: 1/12 of the annual limit for each month you're HSA-eligible on the first day of the month. Starting self-only coverage on July 1, 2026 gives you 6 months, or $2,200 of the $4,400 limit. The exception is the last-month rule: if you're eligible on December 1, you can contribute the full year's limit, but you must stay HSA-eligible through December 31 of the next year. If you don't, the extra amount becomes taxable income plus a 10% additional tax.
Excess HSA contributions are hit with a 6% excise tax for every year they stay in the account. To avoid it, ask your HSA provider to withdraw the excess plus any earnings on it before your tax filing deadline, including extensions. The withdrawn earnings are taxable income, but the 6% tax doesn't apply. Excess contributions most often happen when people forget to count employer contributions or switch jobs mid-year.
No. Once you're enrolled in any part of Medicare, you can't make new HSA contributions, and your limit is prorated for the months before enrollment. Be careful if you sign up for Medicare after 65: Part A coverage is usually backdated up to 6 months (but not before the month you turned 65), so stop HSA contributions 6 months before you apply. You can still spend the money already in your HSA tax-free on qualified medical expenses, including Medicare premiums.
For 2027, the IRS limit rises to $4,500 for self-only coverage and $9,000 for family coverage (IRS Rev. Proc. 2026-24), up from $4,400 and $8,750 in 2026. The age-55 catch-up stays at $1,000 because it isn't indexed for inflation. To qualify in 2027, a high-deductible plan needs a deductible of at least $1,750 self-only or $3,500 family, with out-of-pocket costs capped at $8,700 and $17,400.
Yes. If you contribute through payroll, the money is taken out before tax, so it never shows up in your W-2 taxable wages and you don't deduct it again. If you contribute directly to your HSA, you deduct it on Form 8889 with your tax return, and you don't need to itemize to get it. Either way it lowers your federal income tax, and in every state except California and New Jersey it lowers your state income tax too.
HSA money rolls over forever. Unlike most FSAs, there's no year-end deadline, so whatever you don't spend stays in the account and can keep growing tax-free. That's why many people treat an HSA as a second retirement account: pay small medical bills out of pocket, leave the HSA invested, and use it years later.
Yes. You can pay a medical bill out of pocket now and reimburse yourself from your HSA tax-free at any time later, even years later, as long as the expense happened after you opened the HSA. There's no deadline. Keep the receipts, because you'd need them to prove the withdrawal was for a qualified expense if the IRS asks.
You keep it. An HSA belongs to you, not your employer, and any money your employer already deposited is yours immediately. You can leave the account where it is or move it to another HSA provider. You can keep spending it on medical expenses tax-free, but you can only make new contributions while you're covered by an HSA-eligible plan.
Qualified medical expenses: doctor and hospital bills, prescriptions, dental care including braces and Invisalign, vision care (glasses, contacts, prescription sunglasses), therapy and mental health care, chiropractors, over-the-counter medicines and menstrual products. GLP-1 drugs qualify when prescribed to treat a medical condition. Gym memberships generally don't qualify (the 2025 tax law didn't change that), and neither do cosmetic treatments, general vitamins, vet bills or daycare (daycare belongs in a dependent care FSA). Massage or supplements can qualify only when a doctor says they treat a specific condition, so keep a letter of medical necessity.
Yes, for your spouse and anyone you claim as a tax dependent, even if they aren't on your health plan. Your spouse's dental bill can come out of your HSA tax-free even if they have their own insurance. The catch is adult children: kids can stay on your health plan until 26, but you can only use your HSA for their expenses if they still qualify as your tax dependent.
Usually not, with four exceptions: COBRA premiums, health insurance while you're receiving unemployment benefits, long-term care insurance (up to an age-based limit), and Medicare premiums once you're 65 (Part B, Part D and Medicare Advantage, but not Medigap supplement policies). Regular employer or Marketplace premiums don't qualify.