Draft — under review by a licensed agent.

Retiring After 65

When should I stop contributing to my HSA before starting Medicare?

Pending review by Liz McPherson, licensed insurance agent since 2007 · Updated September 25, 2026

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Short Answer

If you're signing up for Medicare after 65, many people stop HSA contributions about 6 months before they apply, because Part A coverage can be backdated up to 6 months. Once you're enrolled in any part of Medicare, you can't contribute to an HSA.

The Medicare Nerd Explanation

Here's the catch: when you enroll in Medicare after 65, Part A usually starts up to 6 months before the month you apply (but never before the month you turned 65). Contributions made during those backdated months can cause a tax headache. The good news is that you can keep using the money already in your for qualified medical expenses, including some Medicare premiums. Taking Social Security benefits also enrolls you in Part A automatically, so that timing matters too.[LIZ REVIEW]

What Could Change the Answer?

When you plan to apply, whether you're taking Social Security, and your employer's contribution schedule. Check with your tax advisor for your specific numbers.

What Should I Do Next?

  1. Choose your Medicare application date.
  2. Count back 6 months and plan to stop contributions (yours and your employer's) by then.
  3. Talk to your tax advisor about the year you enroll.
  4. Talk to us about coordinating your start date.

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