HSA Contribution Limits and Rules for 2026

A health savings account, or HSA, is a tax-advantaged account available only to people enrolled in a qualifying high-deductible health plan. It is the only account in the US tax system with three separate tax breaks stacked on top of each other: contributions are deductible (or pre-tax through payroll), growth inside the account is untaxed, and withdrawals for qualified medical expenses are untaxed too. Understanding the contribution rules matters because the limit is not one number, it is a small system with several moving parts.

What is the HSA contribution limit?

The IRS sets two base limits each year, adjusted for inflation: one for people with self-only high-deductible health plan coverage, and a higher one for people with family coverage under such a plan. On top of whichever base limit applies, anyone 55 or older by the end of the tax year may contribute an additional catch-up amount.

The self-only and family limits are set annually by the IRS and published each spring for the following year. Check the current figures in IRS Publication 969 before you set a contribution, because using a prior year's number, or a number remembered from an old article, is the most common way people accidentally overcontribute.

Unlike the 401(k) catch-up, which now has an extra tier for ages 60 through 63, the HSA catch-up has a single flat amount that applies from age 55 onward with no further step-up and no cutoff age. It simply continues for as long as you remain HSA-eligible.

What makes a health plan "HSA-eligible"?

Not every plan with a high deductible qualifies. A high-deductible health plan, or HDHP, has to meet minimum deductible thresholds and a maximum out-of-pocket limit, both set annually by the IRS, and your plan documents or insurer will confirm whether it is HSA-qualified. Carrying a plan that looks like a high-deductible plan in casual conversation does not automatically make it one for tax purposes.

Two disqualifying conditions catch people who otherwise assume they are eligible:

• Any other disqualifying health coverage, including being covered as a dependent on a non-HDHP spouse's plan, generally disqualifies you from contributing, even if your own coverage is a qualifying HDHP.
• Enrollment in Medicare disqualifies you from making further HSA contributions from the month your Medicare coverage begins, even if you keep working and keep your employer's HDHP as secondary coverage. This is one of the most consequential rules for people working past 65, covered in more detail below.

A general-purpose health flexible spending account also disqualifies you, though a limited-purpose FSA restricted to dental and vision expenses generally does not. If your employer offers both an HDHP and an FSA, check which type of FSA it is before assuming you can use both.

How does the limit split between spouses?

Family coverage has one combined limit shared between spouses, not one limit per person. If both spouses are covered under the same family HDHP, the family limit is split between two HSAs however the couple decides, as long as the combined total does not exceed the family limit.

The catch-up contribution works differently. It is personal to the individual who is 55 or older, and it must be deposited into that person's own HSA, not into a spouse's account, even if the couple shares one family HDHP. A couple where both spouses are 55 or older, each with their own HSA, can each add their own catch-up on top of the shared family base limit split between them, which two catch-ups deposited into one account cannot achieve.

What happens if I'm only covered part of the year?

The annual limit is generally prorated by the number of months you were HSA-eligible, using whichever coverage tier applied on the first day of each month. Someone who had self-only HDHP coverage for six months and no HDHP coverage for the rest of the year is generally limited to roughly half the annual self-only figure, not the full year's amount.

There is one significant exception, called the last-month rule. If you are HSA-eligible on December 1, you can contribute up to the full annual limit for the year, as if you had been eligible all twelve months, even if you were only covered for part of it. The tradeoff is a testing period: you must remain HSA-eligible for the following calendar year through December, or the extra amount you contributed under this rule becomes taxable income plus a penalty. People who start a new HDHP late in the year and use the last-month rule to maximize their first-year contribution, then change jobs or plans the following year, are the ones who get caught by this.

Can I contribute after I turn 65 and enroll in Medicare?

This is the rule people run into with the least warning, and it is worth stating plainly: enrolling in any part of Medicare ends your ability to contribute to an HSA, starting the month that coverage takes effect, regardless of whether you also keep an employer HDHP and keep working.

The mechanics of how Medicare premiums themselves work, and how they can vary by income, are covered in our Medicare premiums guide, but the HSA-specific trap is this: Medicare Part A enrollment is often retroactive up to six months once you file for Social Security retirement benefits at or after 65, and that retroactive coverage can retroactively disqualify HSA contributions you already made for those months. Someone who keeps contributing to an HSA past 65 without checking their Medicare enrollment date can end up with an excess contribution they did not realize they had made.

The practical fix for people who want to keep contributing past 65: delay filing for Social Security and delay Medicare Part A enrollment (where permitted by your situation), and stop HSA contributions before Medicare coverage begins, with a buffer for the retroactive window.

What can HSA money actually be used for?

Withdrawals for IRS-qualified medical expenses, which is a broad category covering most out-of-pocket doctor, dental, vision, and prescription costs, are entirely untaxed, at any age. That is the core appeal of the account.

Withdrawals for non-qualified expenses before age 65 are taxed as ordinary income and hit with an additional penalty on top. After age 65, non-qualified withdrawals are still taxed as ordinary income but the penalty goes away, which makes an HSA behave a lot like a traditional IRA for non-medical spending once you reach that age, while remaining fully tax-free for medical spending at any age.

This age-65 shift is why many financial planners treat an HSA less like a spending account for this year's medical bills and more like a supplemental retirement account: contribute the maximum, pay medical bills out of pocket if you can afford to, save receipts, and let the account grow untouched for decades.

Does the HSA limit affect my other retirement contributions?

No. The HSA limit is entirely separate from the 401(k) deferral limit of $24,500 for 2026 and the IRA contribution limit of $7,500 for 2026. A household maxing out an HSA is not using up any of the room available in either retirement account, and vice versa. All three can be maxed in the same year by someone with the income and cash flow to do it.

The HSA also has a distinct tax treatment from a pre-tax 401(k) contribution. A traditional 401(k) deferral reduces income tax but not Social Security or Medicare tax. An HSA contribution made through payroll under a cafeteria plan generally avoids all three: income tax, Social Security tax, and Medicare tax, which makes it one of the most efficient pre-tax contributions available to anyone with access to one. A contribution made directly to the HSA outside of payroll, rather than through payroll deduction, is still deductible on your tax return but does not avoid the FICA taxes, since payroll never touched it.

What happens if I contribute too much?

An excess HSA contribution, like an excess 401(k) deferral, needs to be corrected. If you withdraw the excess amount, along with any earnings it generated, before the tax filing deadline for that year, the excess is added to your taxable income for the year but nothing further happens.

If the excess is not corrected by the deadline, it is subject to a 6% excise tax for every year it remains in the account uncorrected, on top of the income tax due when the money is eventually distributed. This is a genuinely punishing outcome for what is usually a paperwork mistake, most often caused by contributing the full family limit while forgetting a mid-year coverage change, or missing the Medicare enrollment interaction described above.

The habit worth building

Because both the base limit and the catch-up amount move every year, and because eligibility can change mid-year with a job change, a marriage, or a Medicare enrollment, the safest approach is to check your eligibility and the current-year limit each January rather than assuming last year's payroll election still fits. Employers often default HSA elections to a flat monthly amount that was correct when it was set up and never revisited, which is how people quietly drift into an excess contribution or leave money on the table.