An excess HSA contribution is not a one-time slap. It is a 6% excise tax that repeats every year until you remove the money.
Leave $1,000 of excess sitting there and you owe $60 this year, $60 next year, and so on. Here is how people overfund by accident, and the two clean ways out.
How the excess happens
- ●You contributed more than the annual limit ($4,400 individual or $8,750 family in 2026, plus $1,000 if 55+)
- ●You lost HSA eligibility partway through the year but kept contributing
- ●A spouse's general-purpose FSA quietly voided your eligibility
- ●You used the last-month rule, then broke the testing period
Any of these can push you over without an obvious red flag.
Fix #1: pull it out before the tax deadline
The clean fix is to withdraw the excess, plus any earnings it generated, before your tax filing deadline including extensions.
Do that and you avoid the 6% entirely. You will pay ordinary income tax on the earnings portion, but that is it. Call your provider and ask for an "excess contribution removal," not a normal distribution. The paperwork is different.
Fix #2: absorb it into next year
If you are still HSA-eligible, you can leave the excess in and apply it against next year's limit.
The catch: you owe the 6% excise tax for each year the excess sat there before it gets absorbed. So this only makes sense for small amounts you can soak up quickly.
The math on waiting
| Excess left in | Years | 6% cost |
|---|---|---|
| $1,000 | 1 | $60 |
| $1,000 | 3 | $180 |
| $3,000 | 3 | $540 |
The tax compounds in the IRS's favor. Removing it early is almost always the better move.
The one move that prevents all of this
Track your contributions against the limit in real time, including anything your employer puts in. Employer contributions count toward your limit.
Most accidental excess comes from forgetting the employer's share, or from contributing on autopilot after eligibility changed. Check the running total before the last contribution of the year, not at tax time when the fix is more expensive.
*This is educational content, not financial or tax advice. Consult a qualified professional before making decisions about your HSA.*