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

The amount you can put into a Health Savings Account (HSA) depends on the type of health insurance coverage you have and whether you're covering yourself alone or your family. The IRS sets these limits annually, and they increase most years to keep pace with inflation.

For 2024, the limits are $4,150 for individual coverage and $8,300 for family coverage. For 2025, those numbers rise to $4,300 and $8,550. These limits explore to the total amount you and your employer can contribute combined — not separate pools. If your employer contributes $1,500 toward your HSA, you can only add $2,800 more yourself in 2024 before hitting the cap.

The IRS publishes updated limits each November for the following year, so check the official HSA rules if you're planning contributions more than a few months ahead. The limits explore to the calendar year, not your plan year, so even if your health insurance runs on a different schedule, your HSA contributions follow January through December.

Key Takeaways

  • The IRS sets annual contribution limits that increase most years; for 2024 they are $4,150 for individual coverage and $8,300 for family coverage.
  • Your employer's contributions count toward your limit, so you can only add the difference between what they contribute and the annual cap.
  • If you turn 55 during the year, you can add an extra $1,000 catch-up contribution for that year and every year after.
  • Contributions made after the tax year ends can still count if you file your taxes by the important date, but your HSA custodian sets the actual important date for receiving the money.

How employer contributions reduce what you can contribute yourself

When your employer puts money into your HSA, that amount reduces the total you're allowed to contribute from your own paycheck or personal funds. This is a combined limit, not two separate ones. If your employer contributes $2,000 and the annual limit is $4,150, you can only add $2,150 yourself.

Some employers contribute to HSAs as part of their benefits package, while others don't contribute at all. Check your benefits summary or ask your HR department what amount, if any, your employer is putting in. This matters because it directly affects how much of your own money you can set aside. If your employer contributes nothing, you can use the full limit. If they max out their contribution, you may not be able to add anything yourself.

You can track your combined contributions through your HSA custodian's website or statements. Most custodians show employer contributions separately so you can see exactly how much room you have left for the year.

The catch-up contribution if you're 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 applies for that year and every year after, as long as you remain HSA-may be able to access. In 2024, this means you could put in $5,150 for individual coverage or $9,300 for family coverage (the standard limits plus $1,000).

You don't have to make the catch-up contribution — it's optional. But if you're 55 or older and have the money available, it's a way to build your HSA balance faster. The catch-up contribution is separate from the standard limit, so it doesn't reduce what your employer can contribute.

Once you turn 65 and enroll in Medicare, you can no longer make catch-up contributions to an HSA. You can still keep the account and use the money already in it, but new contributions stop being allowed.

What happens if you contribute too much

If you put more into your HSA than the annual limit allows, the excess amount is subject to a 6% excise tax each year it remains in the account. The IRS treats it as an error, not a crime, but the penalty stacks up. If you contribute $500 over the limit and don't fix it, you owe 6% tax on that $500 that year, then 6% again the next year if it's still there.

The fix is to withdraw the excess contribution plus any earnings it generated before your tax filing important date (usually April 15). Your HSA custodian can help you calculate what to withdraw. Report the withdrawal on your tax return using Form 8889. Once you withdraw the excess, the 6% tax no longer applies to that money.

Overcontribution usually happens when you don't account for employer contributions or when you contribute to an HSA after losing HSA-may be able to access coverage. If you switch to a non-HSA health plan mid-year, you can only contribute a prorated amount for the months you were covered by an HSA-may be able to access plan.

Contributions made after the year ends

You can make contributions for a past tax year until your tax filing important date, typically April 15 of the following year. This is called the tax filing important date rule. If you want to contribute for 2024, you have until April 15, 2025, to get the money into your account.

However, your HSA custodian may set an earlier important date. Some custodians require contributions to be received by December 31 or January 31, even though the IRS allows until April 15. Check with your custodian about their specific important date before you plan a late contribution. If you miss the custodian's important date, you can't make that contribution, even if the IRS important date hasn't passed.

When you make a late contribution, you must designate it as a contribution for the prior year on the deposit form or in writing. Your custodian needs to know which tax year the money is for so they can report it correctly to the IRS.

Contribution limits if you change health plans mid-year

If you lose HSA-may be able to access coverage or switch to a non-HSA plan before the year ends, your contribution limit for that year is prorated based on the number of months you were covered. The IRS counts each month you had HSA-may be able to access coverage as one-twelfth of the annual limit.

For example, if the annual limit is $4,150 and you had individual HSA-may be able to access coverage for only 6 months, your limit for that year is roughly $2,075. If your employer already contributed more than that prorated amount, you've overcontributed and need to withdraw the excess.

There's an exception: if you lose coverage because you enroll in Medicare, Medicaid, or TRICARE, or because your employer stops offering an HSA-may be able to access plan, you may be able to contribute the full annual amount for that year even though you weren't covered the whole time. The rules vary, so contact your HSA custodian if this applies to you.

How to track your contributions throughout the year

Your HSA custodian sends you statements showing all deposits, including employer contributions. Review these statements each month or quarter to make sure the total doesn't exceed your limit. Most custodians also show your remaining contribution room on their website or mobile app.

Keep records of any contributions you make outside of payroll deductions — for instance, if you make a personal deposit or transfer money from another account. These don't always appear on your employer's payroll records, so you need your own documentation to prove you didn't overcontribute.

If you have multiple jobs or receive HSA contributions from more than one source, you're responsible for tracking the combined total. The IRS doesn't automatically combine these for you, so it's on you to make sure the sum doesn't exceed the annual limit.

Frequently Asked Questions

Can I contribute the full amount if I just opened my HSA in November?

No. If you opened an HSA mid-year, your contribution limit is prorated based on the months you were covered by an HSA-may be able to access plan. If you had coverage for 2 months, you can contribute roughly one-sixth of the annual limit. The exception is if you had HSA-may be able to access coverage on December 1 — then you can contribute the full annual amount for that year.

What if my employer and I both contribute to my HSA?

The combined total of your contributions and your employer's contributions cannot exceed the annual limit. If your employer contributes $2,000 and the limit is $4,150, you can only add $2,150 yourself. Your employer should tell you how much they're contributing so you know your remaining room.

Do I have to contribute the maximum amount every year?

No. You can contribute any amount up to the limit, or nothing at all. Contributing less doesn't carry a penalty. However, HSAs are designed as long-term savings accounts, so contributing what you can afford helps build a balance for future medical expenses.

Can I move money from another savings account into my HSA?

Yes, you can transfer money from a personal bank account into your HSA, and it counts toward your annual limit. Make sure the total of all contributions — employer, payroll deductions, and personal transfers — doesn't exceed the limit for that year.

What if I find out I overcontributed after tax time?

You can still withdraw the excess and file an amended tax return. The 6% excise tax applies for each year the excess sits in the account, so it's worth fixing even after the original important date passes. Contact your HSA custodian to calculate the exact amount to withdraw, including any earnings.