Guide · Updated October 8, 2026
HSA and Medicare: when contributions must stop
Still working at 65 with a high-deductible plan? The HSA rules change the day Medicare starts. Here is the timing that keeps you out of trouble.
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In short
A health savings account (HSA) pairs with a high-deductible health plan. The IRS allows contributions only when you have no other health coverage. Medicare counts as other coverage. The day any part of Medicare starts, your HSA contribution window closes.
The core rule
Once you enroll in Medicare Part A, Part B, Part C, or Part D, you cannot contribute to an HSA. This applies even if you enroll in Part A alone and delay everything else. Your employer cannot contribute either. Contributions made while you have Medicare coverage are excess contributions and can draw a tax penalty.
The 6-month retroactive Part A trap
This is the part that catches working people off guard. If you apply for Medicare after age 65, your Part A coverage can backdate up to 6 months. That means HSA contributions you made in those months overlap with Medicare coverage, even though you applied later.
The safe move: stop all HSA contributions at least 6 months before you apply for Medicare. Tell your employer the stop date in writing. Keep a record of it.
What stays yours
Losing contribution eligibility does not touch money already in the account. Your HSA balance stays yours. After Medicare starts, you can keep using it tax-free for qualified medical expenses:
- Medicare Part B premiums
- Medicare Part D premiums
- Medicare Advantage plan premiums
- Deductibles, copays, and coinsurance
- Dental and vision costs Medicare does not cover
One exception to note: Medigap (Medicare Supplement) premiums are not a qualified HSA expense. You can pay them from the HSA, but the withdrawal is not tax-free.
The 2026 HSA limits
If you are still eligible and contributing, these are the 2026 IRS limits:
| Coverage | 2026 limit |
|---|---|
| Self-only | $4,400 |
| Family | $8,750 |
| Catch-up, age 55 and older | Extra $1,000 per year |
Prorate these limits if you are eligible for only part of the year. The months you have Medicare coverage do not count as eligible months.
If you keep working past 65
You can delay Medicare entirely while you have group coverage from an employer with 20 or more employees. During that delay, HSA contributions can continue. When the job or the coverage ends, you get a special enrollment period for Medicare. That is when the 6-month lookback starts to matter. Here is how Part B works with employer coverage.
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Common questions
- Can I contribute to my HSA after I enroll in Medicare?
- No. Once you enroll in any part of Medicare, including Part A alone, you cannot make or receive HSA contributions. Contributions made while enrolled can trigger a tax penalty.
- Why do I have to stop HSA contributions six months before Medicare?
- Part A coverage can start up to six months before your application date when you apply after 65. Contributions during that window overlap with Medicare coverage and become excess contributions.
- Can I use my HSA money after I enroll in Medicare?
- Yes. Funds already in the HSA stay yours. You can use them tax-free for qualified medical expenses, including Medicare Part B, Part D, and Medicare Advantage premiums. Medigap premiums are not a qualified expense.
- What if my employer keeps contributing to my HSA?
- Employer contributions count the same as yours. They must stop once your Medicare coverage begins. Tell your employer and your HSA provider your Medicare start date.
- Can my spouse keep contributing to an HSA after I enroll in Medicare?
- Yes, in some cases. If your spouse is under 65, still on your high-deductible plan, and not enrolled in Medicare, your spouse can contribute to a separate HSA up to the family limit.
- What happens to my HSA after age 65 for nonmedical spending?
- After 65, you can withdraw HSA funds for any reason without the 20 percent penalty. Nonmedical withdrawals are taxed as ordinary income, like a traditional IRA distribution.
Timing a Medicare start around work and an HSA? Call or text Christian Brinkley in Greensboro, NC at (919) 408-6671. The review is free, with no obligation.
Christian BrinkleyNC Life & Health · Greensboro, NC
Get the timing right before you enroll
Tell me about your work coverage and your HSA. We will map out when to stop contributions and when to start Medicare, so nothing overlaps. Call or text (919) 408-6671.
Free consultation in person or by phone. It’s me who answers. Calls and appointments 9am to 5pm, Monday through Saturday, Eastern time.