Annual contribution limits are set by the IRS and change each year based on inflation

The amount you can contribute to a Health Savings Account depends on the type of health coverage you have and the year. For 2024, the IRS allows individuals with self-only coverage to contribute up to $4,150 per year, and those with family coverage to contribute up to $8,300 per year. These limits increase slightly most years — the IRS announces the new amounts in the fall for the following year.

You must be enrolled in a high-deductible health plan (HDHP) to contribute to an HSA at all. If you drop your HDHP coverage mid-year, you can only contribute a prorated amount for the months you were covered, with one exception: the "last-month rule" lets you contribute the full annual amount if you have HDHP coverage on December 1st, though you must maintain that coverage through the following March 31st or face a penalty.

The contribution limit is a combined total across all HSAs you own. If you have multiple HSA accounts, your total contributions to all of them cannot exceed the annual limit, or the IRS will charge you a 6% excise tax on the overage each year it remains in the account.

Key Takeaways

  • The annual HSA contribution limit for self-only coverage is $4,150 in 2024 and for family coverage is $8,300 in 2024, with amounts increasing most years.
  • You can only contribute to an HSA during months when you are enrolled in a high-deductible health plan, except under the last-month rule.
  • If you have multiple HSA accounts, your total contributions across all accounts cannot exceed the annual limit or you will owe a 6% excise tax on the overage.
  • Contributions made after the tax year ends can be counted toward the previous year if you file your tax return by the deadline, including extensions.
  • Employers can contribute to your HSA on your behalf, and those contributions count toward your annual limit.

Who sets the limits and when they change

The IRS sets HSA contribution limits each year based on the cost of health insurance. The limits apply to the calendar year — January 1st through December 31st — and are announced in the fall of the prior year. You can find the current year's limits on the IRS website or ask your HSA provider what the limit is for your coverage type.

The limits have risen most years since HSAs began in 2004, though not every year. Between 2013 and 2016, the self-only limit stayed at $3,250 because healthcare costs did not rise enough to trigger an increase. Knowing the limit matters because exceeding it carries a penalty, but the limit itself is not a target — you contribute only what you can afford and what makes sense for your situation.

How employer contributions affect your limit

If your employer contributes money to your HSA, that amount counts toward your annual limit. For example, if your employer puts $1,500 into your HSA and you want to contribute your own money, you can only add $2,650 more (assuming the 2024 self-only limit of $4,150). The total across both contributions cannot exceed the limit.

Some employers contribute on a per-paycheck basis throughout the year, while others make a lump-sum contribution at the start of the year or at hire. Your employer should tell you how much they plan to contribute so you can plan your own contributions accordingly. If you are unsure, ask your benefits administrator or check your HSA provider's website — most providers show employer contributions separately from your own.

Catch-up contributions if you are 55 or older

If you turn 55 during the calendar year, you become may be able to access to make an additional catch-up contribution of $1,000 per year (this amount does not change annually). This $1,000 is on top of the regular annual limit, so a 55-year-old with self-only coverage could contribute $5,150 in 2024 ($4,150 plus $1,000).

You can make catch-up contributions starting in the month you turn 55 and continuing each year after that, as long as you remain enrolled in an HDHP. If you drop your HDHP coverage mid-year after turning 55, you can only make a prorated catch-up contribution for the months you were covered. The catch-up contribution is separate from the regular limit, so if your employer contributes, only the regular limit is reduced — the catch-up portion stays available to you.

Deadlines for making contributions

You can contribute to your HSA at any time during the calendar year, and most providers let you set up automatic monthly transfers. The key deadline is tax day: contributions made after December 31st can count toward the previous year's limit if you make them by your tax filing deadline, including extensions. For example, you could contribute to your 2024 HSA as late as April 15, 2025 (or later if you file an extension) and have it count toward your 2024 limit.

This matters because it gives you flexibility. If you do not know your income or healthcare costs until late in the tax year, you can wait to see how much you can afford to contribute, then make a catch-up contribution early the next year and designate it for the prior year on your tax return. Your HSA provider may ask you to specify which year a contribution is for if you make it after the calendar year ends.

What happens if you contribute too much

If you contribute more than the annual limit, the IRS charges a 6% excise tax on the overage for each year it stays in the account. The overage itself is not taxed as income — only the 6% penalty applies. You can remove the excess contribution and the associated earnings by the tax filing deadline, and if you do, you avoid the penalty.

To fix an overage, contact your HSA provider and ask them to return the excess contribution plus earnings to you. You will owe income tax on the earnings portion, but not the 6% penalty. If you do not catch the overage until after tax day, you can still file an amended return and request the removal, though the penalty may have already accrued. Some providers have forms to help you request this; others require a letter explaining the overage.

Contribution limits across different family situations

The IRS defines two coverage types: self-only and family. Self-only means you are the only person covered by the HDHP. Family coverage includes you plus at least one other person — a spouse, child, or dependent. The family limit applies no matter how many people are covered, so a family of two and a family of five have the same $8,300 limit in 2024.

If you are married and both spouses have self-only coverage through separate employers, each spouse has their own $4,150 limit. If one spouse has family coverage and the other has self-only coverage, the spouse with family coverage uses the $8,300 limit, and the other spouse cannot contribute at all (because they are already covered under the family plan). The rules are strict here: you cannot have overlapping coverage and contribute to multiple accounts.

Frequently Asked Questions

Can I contribute more to my HSA if I have a higher deductible?

No. The contribution limit is based only on your coverage type (self-only or family) and the year, not on how high your deductible is. A person with a $2,000 deductible and a person with a $10,000 deductible both have the same $4,150 limit in 2024 if they have self-only coverage.

What if I change jobs mid-year and lose my HDHP coverage?

You can only contribute for the months you were covered. If you had HDHP coverage for six months, you can contribute half the annual limit (rounded up). The exception is the last-month rule: if you have HDHP coverage on December 1st, you can contribute the full annual amount, but you must keep that coverage through March 31st of the following year or repay the excess.

Do HSA contributions reduce my taxable income?

Yes, if you contribute through payroll deductions, the contributions are taken out before taxes are calculated. If you contribute directly to your HSA outside of payroll, you can deduct the contributions on your tax return. Either way, the contribution amount reduces your taxable income for that year.

Can I contribute to an HSA if I am on Medicare?

No. Once you enroll in Medicare, you are no longer may be able to access to contribute to an HSA, even if you also have an HDHP. You can continue to withdraw money from an existing HSA for may have access to medical expenses, but you cannot add new contributions.

If my employer contributes to my HSA, do I have to report it on my taxes?

Employer contributions to your HSA are not taxable income to you and do not need to be reported as income on your tax return. They count toward your annual limit, but they are not treated as wages or compensation for tax purposes.