Can I delay Medicare Part B?
Can I delay Medicare Part B if my employer has 20+ employees?
Put simply, yes. If you're working past age 65 and your employer has 20 or more employees, you can typically delay Medicare Part B without a late enrollment penalty.
The reason comes down to two conditions. First, your employer's group health plan must qualify as creditable coverage—meaning it's comparable to or better than Medicare. Additionally, the 20-employee rule stipulates that your company's plan serves as your primary insurance, which protects you from penalties. If both conditions are met, delaying Part B is often a legitimate, penalty-free choice.
We'll walk through the basics, including common missteps, when it makes sense to delay Part B, and what you need to do to avoid lifelong penalties.
A Common Mistake
Many people think the Part B delay is automatic, but you must actively confirm that your medical coverage qualifies as creditable (better than or equal to Medicare coverage) before you choose to delay Part B.
What Most People Don't Realize
When your employer coverage ends, your Special Enrollment Period (SEP) has a strict window. If you miss it, you could face a lifelong Part B penalty on top of your monthly Part B premium.
Many people are surprised to learn that enrolling in Medicare Part B early, while still employed at a company with 20 or more employees, can change the way costs are divided between Medicare and the employer's health plan. As a result, signing up for Part B before you actually need it may not always be cost-effective.
When does it make sense to delay Medicare Part B?
Delaying Part B allows you to save on the Part B monthly premium while you're covered under another plan. However, it may not be the right choice for everyone.
When delaying Part B can be beneficial:
- Your employer plan is strong, and paying a second premium for Part B adds little value.
- Your coverage is confirmed creditable for medical benefits.
You're still working, and your employer plan costs less than adding Part B would.
When delaying Part B can have negative consequences:
- Your employer plan is high-premium or high-deductible, and Medicare might cost less overall.
- If you assume your coverage is creditable without confirming it.
- If you lose track of the enrollment window after leaving your job.
Essentially, the decision to delay Part B depends on your specific situation—not a one-size-fits-all rule, which is why it's important to consult an expert who can help you compare your options.
How Coordination of Benefits Actually Works at a 20+ Employee Company
If you’re working at a company with 20 or more employees, the rules of who pays for healthcare services are set for you:
- Your employer's group plan pays first (primary).
- Medicare pays second (secondary), if you're enrolled.
Delaying enrollment in Part B can be beneficial for many people because their employer's plan is already covering most of their health insurance needs. However, there’s an important age-related consideration to keep in mind: if you qualify for Medicare due to a disability and are under 65, Medicare will only serve as your primary insurance if your employer has fewer than 100 employees. For most individuals who are 65 and older, the relevant threshold is 20 employees.
What Happens When Your Employer Coverage Ends
When you retire, leave your job, or lose your group coverage, the window to delay Part B without penalties closes. This is an important transition—and one that requires timely action.
Here's what to do:
- Mark your Special Enrollment Period. This limited window enables you to enroll in Part B without a penalty—but only if you act within the specified timeframe.
- Confirm your drug coverage. If your prescription coverage isn't continuing, you'll want to enroll in a Medicare Part D plan to avoid that penalty.
- Don't wait. A lapse in coverage after your employer plan ends is exactly what triggers late enrollment penalties.
Our licensed advisors can help you time these steps correctly, so you avoid gaps and penalties.
Frequently Asked Questions
Does COBRA count as qualifying coverage to continue delaying Part B?
The Consolidated Omnibus Budget Reconciliation Act (COBRA) is a law that may allow you to keep employer coverage for a period after leaving your employer. However, COBRA is not considered creditable coverage to delay Medicare Part B.
What happens if I miss my Special Enrollment Period?
Missing your Special Enrollment Period can leave you facing a Part B late enrollment penalty, which is added to your Part B monthly premium for as long as you have Medicare. Acting promptly when your coverage ends is the best way to avoid it.
Can I delay Part B if I'm covered under my spouse's large-employer plan?
Yes. If you're covered by a spouse's group plan through an employer with 20 or more employees, the same primary-coverage protection generally applies. Just remember that Medicare doesn't cover dependents, so your spouse will need their own coverage plan in place too.
How does creditable coverage for Part D factor into this?
It's important to remember that drug coverage is separate from medical coverage. Even if your medical coverage is considered creditable, you still need to verify that your prescription drug coverage is also creditable. If it is not deemed creditable, you may need to enroll in a Medicare drug plan to avoid incurring a Part D penalty.
If I delay Part B, will my Part A enrollment also be delayed?
No—delaying Part B does not mean you're also delaying Part A. If you're receiving Social Security benefits before or at age 65, you're typically enrolled in Medicare Part A automatically. Part A covers inpatient hospital stays and generally has no premium (for most people), so there's usually no reason to delay it. Part B, however, covers outpatient medical care and comes with a monthly premium—which is why many people working at large employers choose to delay it. The two are separate, so it's important not to confuse them when planning your coverage strategy.
The Bottom Line
You can delay Medicare Part B without penalty if your employer (or your spouse's) has 20 or more employees and your medical coverage is considered creditable. The key is to act quickly once your employer coverage ends by enrolling during your Special Enrollment Period to avoid lifelong penalties.
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Our advisors are here to help you navigate the ins and outs of Medicare - and delaying Part B, if it makes sense for your situation. Schedule an appointment today!