Whether to enroll in Medicare while still working depends on several factors — primarily the size of your employer and the quality of your current coverage. In some situations, delaying Medicare enrollment is completely appropriate and penalty-free. In others, it can result in gaps in coverage, unexpected costs, and enrollment penalties that follow you for life.
The most important variable is how many employees your company has. If your employer has 20 or more employees, your employer plan is typically considered primary and Medicare is secondary — meaning you may be able to delay Medicare Part B without penalty. If your employer has fewer than 20 employees, Medicare becomes primary, and not enrolling could leave you with significant coverage gaps.
That can be appropriate — or costly — depending on your situation.
Many individuals delay Medicare because they are still employed.
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The rules vary depending on employer size.
Delayed enrollment misunderstandings
Employer plans that do not coordinate well
Gaps in prescription coverage
Unexpected penalties
Common risks include:
Risk Exposure
Small details matter here.
What costs are you exposed to with your employer coverage?
When does your employer coverage end?
Is your prescription coverage creditable?
How many employees does your company have?
Important questions:
Transition Timing
Frequently Asked Questions
It depends on your employer’s size. If your employer has 20 or more employees, you can typically delay Medicare Part B without penalty while on employer coverage. If your employer has fewer than 20 employees, Medicare becomes primary at 65 and you should enroll to avoid coverage gaps.
Should I enroll in Medicare if I still have employer insurance?
When employer coverage ends, you have an 8-month Special Enrollment Period to sign up for Medicare Part B without a late penalty. It is important to enroll during this window — not just when you lose coverage.
What happens if I delay Medicare and my employer coverage ends?
Yes. Many people have both, and coordination of benefits rules determine which pays first. Whether that arrangement works well depends on your employer’s plan structure and group size.
Can I have both Medicare and employer insurance at the same time?
A penalty may apply if you delay Medicare Part B or Part D without qualifying coverage. The Part B penalty is 10% per 12-month period of delay and is permanent.
Will I be penalized for delaying Medicare enrollment?
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