Question 1

Do I have to close my HSA when I enroll in Medicare?

Accepted Answer

No. You can keep your HSA account open and continue spending existing funds tax-free on qualified medical expenses — including Medicare Part B, Part D, and Medicare Advantage premiums. You cannot make new contributions once any Medicare part begins, but the account itself does not need to be closed and your balance is not forfeited.

Question 2

What is the retroactive Part A trap?

Accepted Answer

When you apply for Social Security or Medicare at age 65 or later, Part A can begin up to 6 months before your application date — but no earlier than the month you first became Medicare-eligible. Any HSA contributions made by you or your employer during those retroactive months may be treated as excess contributions by the IRS, triggering income tax and a 6% excise tax. To avoid this, stop all contributions at least 6 months before you plan to apply.

Question 3

Do employer HSA contributions count toward the penalty?

Accepted Answer

Yes. Your employer's payroll deposits to your HSA are subject to the same IRS excess contribution rules as your own deposits. Once you are enrolled in any part of Medicare, employer contributions also become excess. Coordinate with your HR department or payroll provider to stop employer contributions before Medicare enrollment begins.

Question 4

How do I correct excess HSA contributions?

Accepted Answer

You may be able to withdraw the excess contribution amount — plus any net earnings attributable to it — before your federal tax-filing deadline (including extensions) to reduce or eliminate the 6% excise tax. The rules are specific to your situation; speak with your HSA administrator or a qualified tax professional about the correction process.

Question 5

What does '6% excise tax' mean in this context?

Accepted Answer

The IRS imposes a 6% excise tax on excess HSA contributions — those made after Medicare enrollment begins. This tax applies for each tax year the excess remains in the account. It works like the excess-contribution penalty for IRAs: it compounds annually until the excess is corrected. The tax is reported on IRS Form 8889.

HSA Medicare Penalty: What Happens If You Contribute?

Frequently Asked Questions