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How does my Health Savings Account (HSA) affect Medicare?

What considerations should I make if I have a Health Savings Account (HSA) when applying for Medicare?

Having a Health Savings Account (HSA) can be super beneficial, but things get a bit tricky when you become eligible for Medicare. Here are the key considerations to keep in mind:

You Can’t Contribute to an HSA Once Enrolled in Medicare

HSA contributions must stop the first month you’re enrolled in Medicare Part A or B.

If you keep contributing after your Medicare enrollment begins, you could face tax penalties for excess contributions.

Planning Tip:
Stop contributions at least 6 months before applying for Medicare, especially if you’re taking Social Security benefits, which auto-enrolls you in Medicare Part A.

You Can Still Use HSA Funds

Even though you can’t contribute, you can still:

Withdraw tax-free funds for qualified medical expenses, including:
- Medicare premiums (except Medigap)
- Copays, deductibles
- Dental, vision, hearing
Withdraw for any purpose after age 65 – just note non-medical withdrawals are taxed as regular income.

Timing and Retroactive Coverage

Enrolling in Medicare after age 65? Part A can be retroactive for up to 6 months, potentially making some HSA contributions in that period ineligible.
To avoid excess contribution penalties: stop HSA contributions 6 months before Medicare enrollment.

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Still Working?

If you’re 65+ and still working with a high-deductible health plan (HDHP) through your employer:
- You can delay Medicare (usually Part B), which lets you keep contributing to your HSA.
- Make sure your employer has 20+ employees for Medicare to be secondary.

Summary Strategy

Review Medicare enrollment timing carefully.
Plan to stop HSA contributions 6 months ahead of enrolling in Medicare.
Coordinate with your employer’s benefits team or a financial advisor if you’re still working.

Sylvia Gordon, aka Medicare Mama^®, is an expert on all things Medicare and Social Security. She is the 2nd Generation here at The Medicare Family and has served on the advisory boards of major insurance companies like UnitedHealthcare^®, Cigna, and Anthem. In her free time, she can be found taking care of her animals (dogs, goats, peacocks, chickens), and reading a good book. Learn More.

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