HSA Excess Contribution: What to Do If You Over-Contribute

An excess HSA contribution happens any time the total amount added to your HSA in a calendar year, whether it’s from you, your employer, your spouse's HSA (if you're on a family plan), or an IRA-to-HSA rollover, goes over the IRS annual limit for your coverage type.

A few situations that commonly lead to this:

• You changed employers mid-year and both employers' HSA contributions added up to more than the annual limit
• You and your spouse each have an HSA and your combined contributions exceeded the family limit
• You switched from family to individual coverage (or the reverse) partway through the year
• You enrolled in Medicare mid-year, which makes you ineligible to contribute for the months you're covered
• You moved in or out of a high-deductible health plan (HDHP) during the year

Because HSA eligibility is based on your coverage status on the first day of each month, a contribution limit isn't always a flat number and it can actually be prorated based on how many months you were actually eligible.

The IRS sets HSA contribution limits annually and adjusts them for inflation. For 2026, the limits are $4,400 for individuals with self-only coverage and $8,750 for those with family coverage. If you're 55 or older, you can add an extra $1,000 catch-up contribution on top of either limit.

If you weren't HSA-eligible for the full calendar year, your personal limit is generally prorated based on the number of months you were eligible, using the coverage status you had on the first day of each month. Keeping a running total of contributions from every source, including payroll, personal deposits, and any spousal HSA, is the simplest way to avoid crossing your limit without noticing.

Excess contributions don't just sit there harmlessly. Per IRS Publication 969, if you leave an excess contribution in your account, you'll generally face:

• No tax deduction on the excess amount (if it came from your own contributions)
• Taxable income on any excess amount your employer contributed on your behalf
• A 6% excise tax on the excess contribution, charged every year it remains uncorrected
• Income tax on any investment earnings the excess contribution generated

That 6% excise tax is the part that catches people off guard because it's not a one-time fee. It applies annually for as long as the excess amount stays in your account, which is why fixing it sooner rather than later is important.

A quick example: Say you contributed $500 more than your 2026 limit, and that money earned $10 in interest before you noticed. If you leave it in your account, you'd owe income tax on the $500 (if it was an employer contribution) plus a 6% excise tax on the combined $510, about $30.60, and that excise tax repeats every year until it's corrected. Withdraw it before the deadline, on the other hand, and you'd only owe regular income tax on the $10 of earnings, with no excise tax at all.

The most common fix is a "corrective distribution" which refers to withdrawing the excess contribution, plus any earnings it generated, before your tax filing deadline (typically April 15, or October 15 if you filed for an extension).

Here's the general process:

Contact your HSA provider and request a withdrawal of excess contributions (sometimes called a "return of excess contribution"). Most providers have a specific form for this rather than a standard withdrawal.

Confirm the earnings calculation. Your provider will typically calculate any earnings attributable to the excess amount, since those also need to come out.

Complete this before your tax deadline. If you remove the excess (and its earnings) by the deadline, you avoid the 6% excise tax entirely. You'll just owe ordinary income tax on the earnings portion.

Watch for a corrected 1099-SA. Depending on timing, your provider may issue an updated tax form reflecting the correction.

Don't wait until the last few days before the deadline because processing a corrective distribution can take time, and providers may need paperwork submitted well in advance.

HSA withdrawal rules can be hard to understand if you’re new to utilizing one of these accounts. Our HSA withdrawal rules deep dive breaks down the key things you need to know before making a standard withdrawal from your HSA account.

If you've already invested the excess funds and don't want to sell at a loss, or you simply missed the withdrawal deadline, you have a second option: apply the excess amount toward next year's contribution limit.

This works by intentionally contributing less than your limit the following year, essentially letting the prior year's overage "absorb" part of next year's room. You may even be able to deduct that amount in the following year's taxes, subject to IRS rules. The tradeoff is that you'll still owe the 6% excise tax for the year(s) the excess money sat in your account before it was applied forward, so be sure to keep that in mind before making your decision.

If you don't correct an excess contribution before the deadline, you'll need to report it using IRS Form 5329, which calculates the 6% excise tax owed. You'll file this alongside your regular tax return, and you'll need to do it again each year the excess amount remains in your account uncorrected. This is generally the most expensive path, since it stacks ordinary income tax with a recurring excise tax. This is why most people try to withdraw or carry the amount forward instead.

Excess contributions are easy to miss because the money often comes from more than one source. Before you assume you're in the clear:

• Add up every contribution source: payroll deductions, direct personal deposits, employer contributions, and (if applicable) your spouse's HSA contributions toward a shared family limit.
• Check your W-2. Employer and payroll-deducted contributions typically show up in Box 12 with code W. This is a fast way to see what's already been counted against your limit.
• Recalculate if your coverage changed. A new job, a switch from family to individual coverage, or enrolling in Medicare mid-year all change your prorated limit. Recheck the math any time one of these happens.
• Log into your HSA provider's portal. Most providers show year-to-date contributions, which makes it easy to compare against your limit before the year ends.

Both options fix the problem, but which one makes more sense depends on your situation. Here are a couple things to keep in mind when making your decision:

• You may want to withdraw the excess if the money is still in cash, you're within your filing deadline, and you'd rather deal with it once and move on. This avoids the excise tax entirely.
• You may want to carry it forward if you've already invested the excess and don't want to sell at a loss, or if you missed the corrective-distribution deadline and it's already accruing the excise tax regardless. In that case, applying it to next year's limit at least stops it from growing into a repeated problem.

If you're unsure, a tax professional can help you run the numbers for your specific situation, especially if multiple years are involved.

The easiest way to avoid this altogether is to treat your HSA limit the way you'd treat any other capped account: check the current year's limit before setting up contributions, divide it evenly across your pay periods, and recheck your running total any time your coverage or employer changes. If you're contributing through payroll and also making personal deposits, keep a simple running tally to keep the math from going sideways.

And if you do end up with a little extra sitting in your HSA, remember it isn't wasted money. As long as it's within your limit, it's still available to spend tax-free on qualified medical expenses. HSA/FSA marketplace, Truemed, can help you use HSA/FSA funds toward eligible health purchases, so any properly-contributed balance keeps working for you instead of sitting unused.