HSA Contribution Calculator 2026
How much more you can contribute to an HSA for 2026 after employer contributions, catch-up and month pro-rating, the per-paycheck amount to max out, the tax saved and what it grows to if invested. Limits from Rev. Proc. 2025-19.
| 2026 limit for your coverage | — |
|---|---|
| Catch-up (55+) | — |
| Pro-rated for months of coverage | — |
| Less employer + your contributions so far | — |
| Per paycheck to max out | — |
| Your planned contributions | — |
| Tax saved this year | — |
| If invested and left to grow | — |
In short
The 2026 HSA contribution limit is $4,400 for self-only and $8,750 for family HDHP coverage, plus $1,000 at age 55+, including employer contributions, pro-rated by months of coverage unless the last-month rule applies. Payroll contributions avoid income tax and 7.65% FICA; growth and medical withdrawals are tax-free, making the HSA the most tax-efficient account available.
Who this is for: US employees and self-employed people on a high-deductible health plan.
2026 HSA rules
| 2026 | Self-only | Family |
|---|---|---|
| Contribution limit | $4,400 | $8,750 |
| Catch-up, age 55+ | +$1,000 | +$1,000 (per spouse, in separate HSAs) |
| HDHP minimum deductible | $1,700 | $3,400 |
| HDHP maximum out-of-pocket | $8,500 | $17,000 |
- Employer contributions count towards the same limit.
- Partial years are pro-rated by month — unless you are covered on 1 December, when the last-month rule allows the full limit if you stay covered through the next year.
- Payroll contributions also avoid Social Security and Medicare tax; direct contributions get the income-tax deduction only.
- Invest it: paying current medical bills from cash and letting the HSA grow is the highest-value retirement account available — withdrawals for medical costs are never taxed, and receipts can be reimbursed years later.
- Excess contributions are taxed 6% a year until removed; California and New Jersey tax HSA contributions and earnings at state level.
Assumptions
- Limit = 2026 self/family limit + $1,000 catch-up at 55+, × months of coverage ÷ 12; room = limit − employer − contributed so far.
- Tax saved = contribution × (marginal federal rate + 7.65% FICA + state rate), assuming payroll contributions.
- Growth = contribution × (1 + return)^years; annual-max projection uses the future value of an annuity.
Worked example
Limit $8,750; room after the employer's $1,000 = $7,750, or $298 per paycheck. Contributing it saves about $2,685 this year (22% federal + 7.65% FICA + 5% state) — $7,750 in the account for $5,065 out of pocket. Left invested, that single year grows to about $33,300 tax-free; maxing every year for 25 years would build roughly $480,000.
Frequently asked questions
What is the HSA contribution limit for 2026?
$4,400 for self-only coverage and $8,750 for family coverage, plus $1,000 if you are 55 or older — including anything your employer contributes.
Can I contribute to an HSA if I changed plans mid-year?
Yes — the limit is pro-rated by months of HDHP coverage, unless you are covered on 1 December and use the last-month rule.
Is an HSA better than a 401(k)?
For medical spending it is the only account with no tax at any stage; most planners say capture the 401(k) match first, then max the HSA, then the rest of the 401(k).
What happens to my HSA if I leave my job?
It is yours — the balance stays, can be moved to another provider, and can still be spent on medical costs; you just cannot add to it without HDHP coverage.
Can I contribute to an HSA without an employer?
Yes, directly, if you have qualifying HDHP coverage; you deduct it on your return (no FICA saving that way).
Can I use an HSA for my spouse or children?
Yes — qualified medical expenses of your spouse and dependants are covered even if they are not on your HDHP.
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