Medicare vs Employer Insurance

Turning 65 and still working? 1-800-MEDIGAP helps you compare Medicare and your job plan, for free.

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Quick answer

Whether Medicare or employer insurance is better depends on your employer's size. At companies with 20+ employees, the group plan pays first and you can usually delay Part B penalty-free. At smaller employers, Medicare typically pays first, so enrolling at 65 is important to avoid coverage gaps, per CMS.

Choosing between Medicare and employer coverage at 65 hinges on a few key rules. Here is how to decide.

Which pays first, Medicare or employer insurance?

The answer depends on employer size. If your employer has 20 or more employees, the group health plan is the primary payer and Medicare pays second, so you can usually delay Part B without penalty while you keep working. If your employer has fewer than 20 employees, Medicare generally pays first and the group plan pays second, which means you typically need to enroll in Medicare at 65 to avoid coverage gaps. Getting this wrong can leave claims unpaid. Always confirm your employer's size and how its plan coordinates with Medicare before deciding. Call 1-800-MEDIGAP for free, personalized guidance.

When to keep employer coverage and delay Medicare

If you work for a large employer (20+ employees) with solid, affordable coverage, keeping the group plan and delaying Part B can save money, and you will get a Special Enrollment Period to join Medicare penalty-free when you stop working. Many people still enroll in premium-free Part A. Weigh your group plan's premiums, deductibles, networks, and drug coverage against Medicare's costs. If your employer coverage is expensive or limited, Medicare plus a Medigap or Advantage plan might be better even while working. There is no one-size answer. 1-800-MEDIGAP can compare your specific employer plan against Medicare at no cost.

Avoiding penalties and HSA pitfalls

Two traps deserve attention. First, the Part B late-enrollment penalty: if you delay Part B without qualifying active employer coverage, you face a lifelong premium surcharge. Second, Health Savings Accounts: once you enroll in any part of Medicare, including premium-free Part A, you can no longer contribute to an HSA, and back-dated Part A enrollment can create tax issues. If you plan to keep contributing to an HSA, you may need to delay all of Medicare, including Part A. These rules interact in complex ways. Call 1-800-MEDIGAP for free help avoiding penalties and HSA mistakes.

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Frequently asked questions

Should I take Medicare or keep employer insurance at 65?+

It depends on employer size. At companies with 20+ employees, you can usually keep the group plan and delay Part B penalty-free. At smaller employers, Medicare pays first, so enrolling at 65 is important. Call 1-800-MEDIGAP to compare your specific plan.

Which pays first, Medicare or my employer plan?+

If your employer has 20 or more employees, the group plan pays first and Medicare second. If your employer has fewer than 20 employees, Medicare generally pays first. Knowing this determines whether you must enroll at 65 to avoid gaps.

Can I delay Part B if I'm still working?+

Yes, if you have qualifying active coverage from an employer with 20+ employees. You then get a Special Enrollment Period to join Part B penalty-free when employment ends. At smaller employers, delaying can cause penalties and gaps. Confirm before deciding.

Can I contribute to an HSA on Medicare?+

No. Once you enroll in any part of Medicare, including premium-free Part A, you can no longer contribute to a Health Savings Account. If you want to keep contributing, you may need to delay all of Medicare. Call 1-800-MEDIGAP for guidance.

Is employer drug coverage as good as Part D?+

Often, but not always. Check whether your employer drug coverage is creditable for Medicare Part D. If it is not, you could owe a Part D late penalty later. Your plan's creditable-coverage notice will say. Call 1-800-MEDIGAP for free help.

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