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

The amount you can put into a health savings account depends on the type of health insurance plan you have and whether you cover yourself alone or your family. The IRS sets these limits annually, and they increase slightly most years to account for inflation. For 2024, the limit is $4,150 for individual coverage and $8,300 for family coverage. For 2025, those limits rise to $4,300 and $8,550. These are the maximum amounts you can contribute in a calendar year—you cannot exceed them, even if your account balance is lower.

Your employer may contribute to your HSA as well, and that counts toward your limit. If both you and your employer put money in, the combined total cannot exceed the annual maximum. Self-employed people and those without employer contributions can contribute the full amount on their own.

Key Takeaways

  • The IRS sets annual HSA contribution limits that vary by coverage type: individual or family, and these limits increase most years.
  • Your employer's contributions count toward your limit, so you need to know how much they put in before you add your own money.
  • You can contribute until the tax filing deadline of the following year (usually April 15) for the prior year's limit.
  • If you turn 55 or older, you can contribute an additional $1,000 per year as a catch-up contribution.
  • Exceeding the limit results in a 6 percent excise tax on the overage and potential tax complications, so tracking your contributions matters.

How employer contributions reduce your personal limit

If your employer offers an HSA and contributes money to it, that amount is subtracted from your annual limit. For example, if your employer contributes $1,500 to your HSA and you have individual coverage with a 2024 limit of $4,150, you can only contribute $2,650 of your own money that year. The limit is a combined total, not separate pools.

Your employer should tell you how much they plan to contribute, usually during open enrollment or when you first enroll in a high-deductible health plan. If you are unsure, ask your benefits administrator or check your pay stub—employer HSA contributions often appear there. Knowing this number before you start contributing from your paycheck prevents you from accidentally exceeding the limit.

Catch-up contributions if you are 55 or older

Once you turn 55, you can contribute an additional $1,000 per year beyond the standard limit. This is called a catch-up contribution and is designed to help people save more for healthcare costs in retirement. If you are 55 with family coverage in 2024, your limit is $8,300 plus $1,000, for a total of $9,300. This extra $1,000 applies only to you—your spouse cannot use it unless they are also 55.

You can make catch-up contributions for every year you are 55 or older and enrolled in an HSA-may be able to access plan. The catch-up amount does not change year to year; it remains $1,000. If you are married and both spouses are 55 or older, you can each contribute an additional $1,000, for a combined extra $2,000.

When you can contribute and the tax filing deadline

You can contribute to your HSA during the calendar year, and you have until the tax filing deadline of the following year—usually April 15—to make contributions that count toward the prior year's limit. This is called the tax filing deadline rule. For example, you can contribute to your 2024 HSA until April 15, 2025. This gives you extra time if you want to maximize your savings for a year you have already lived through.

Most people contribute through payroll deductions, which happen automatically throughout the year. If you contribute on your own (not through payroll), you can make deposits whenever you want, as long as the total does not exceed your limit by the deadline. Keep track of all contributions—yours and your employer's—to make sure you stay within the annual maximum.

What happens if you contribute too much

If you put more money into your HSA than the annual limit allows, the IRS charges a 6 percent excise tax on the overage amount for each year it remains in the account. This tax applies to the excess funds themselves, not to your income. For example, if your limit is $4,150 and you contribute $4,500, the $350 overage is taxed at 6 percent per year until you withdraw it. You also owe income tax on the overage when you withdraw it, which means you pay tax twice on the same money.

To fix an overage, you must withdraw the excess amount plus any earnings on that amount before the tax filing deadline. Your HSA provider can help you calculate this. If you discover an overage after the deadline has passed, you still need to withdraw it, but you will owe the excise tax for the years it sat in the account. This is why tracking contributions throughout the year matters—it is easier to adjust before the deadline than to fix it afterward.

Contribution limits if you enroll mid-year

If you enroll in an HSA-may be able to access plan partway through the year, you can still contribute the full annual limit for that year, as long as you remain enrolled through December 31. This is called the last-month rule. If you enroll on July 1, you can contribute the full $4,150 (for 2024 individual coverage) even though you were only covered for six months. However, if you drop the plan before December 31, you must withdraw any excess contributions and pay the 6 percent excise tax.

If you enroll late in the year and want to use the last-month rule, make sure you understand the requirement to stay enrolled through year-end. If your circumstances change and you need to drop the plan early, contact your HSA provider immediately to discuss your options and avoid penalties.

Frequently Asked Questions

Can I contribute more if I have a higher deductible?

No. The contribution limit is based on your coverage type (individual or family), not on your deductible amount. Two people with individual coverage have the same limit even if one has a $1,500 deductible and the other has a $3,000 deductible.

What if my employer changes their contribution amount mid-year?

If your employer increases or decreases their HSA contribution after you have already contributed your own money, you need to recalculate your total to make sure you have not exceeded the limit. Contact your benefits administrator and your HSA provider to adjust if needed. If you have already gone over, you must withdraw the excess before the tax filing deadline.

Do unused contributions roll over to the next year?

Yes. Unlike flexible spending accounts, HSA balances roll over indefinitely. Money you do not spend in 2024 stays in your account for 2025 and beyond. However, your annual contribution limit resets each January, so you can only add the new year's maximum amount, not carry over unused contribution room.

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. You can still withdraw money for may have access to medical expenses, but you cannot add new contributions. If you are still working and considering Medicare, talk to your benefits administrator about the timing.

What if I have two jobs with HSA plans?

You can only have one HSA at a time, and your combined contributions from all sources cannot exceed the annual limit. If both employers offer HSAs, you must choose one and coordinate contributions carefully. The combined total of your contributions and both employers' contributions must stay within the limit.