Can I delay Medicare Part B if I'm still working at 65?
Many people keep working at 65 and keep their health insurance through work. Whether that lets you wait on Part B comes down to a few specific details about your job and your coverage.
Often, yes. If you are still working at 65 and have group health coverage through your current job (or your spouse's current job), you can usually delay Part B and sign up later without a late penalty, as long as the coverage is tied to active employment rather than COBRA or retiree coverage. Whether waiting makes sense also depends on your employer's size, because that usually decides whether your work plan or Medicare pays first.
Delaying Part B while still working at 65: the general rule
Original Medicare means Part A (hospital insurance) and Part B (medical insurance). Part B carries a monthly premium, so people who already have health insurance through work often ask whether they need it yet.
The general rule: if you have group health coverage based on current employment, yours or your spouse's, you can wait on Part B and sign up at any time while that coverage lasts. After the job or the coverage ends, whichever happens first, you have a Special Enrollment Period (a window outside your normal sign-up dates) of 8 months to enroll without a late enrollment penalty.
The key words are "current" and "employment." The coverage has to come from a job someone is actively doing right now. Coverage that continues after a job ends works differently.
Your Initial Enrollment Period, the first window you have to sign up, is 7 months long: the 3 months before the month you turn 65, your birthday month, and the 3 months after. If your situation meets the rule, you can let this window pass for Part B. Our page on when to sign up for Medicare in PA covers that first window in more detail.
How many people work for your employer changes who pays first
When you have both Medicare and a job-based plan, one pays your bills first (the primary payer) and the other may pay second. Your employer's size usually decides the order.
If your employer has 20 or more employees, the group plan generally pays first and Medicare pays second. In that setup, many people choose to wait on Part B.
If your employer has fewer than 20 employees, Medicare generally pays first, and the work plan may expect you to have Part B. Skipping Part B there could leave you with bills the work plan will not cover, even though no late penalty would apply.
Ask your benefits office directly how the plan works with Medicare. Medicare.gov also explains the basics on its working past 65 page.
Which coverage lets you wait on Part B, and which does not
A neutral side-by-side of how Medicare generally treats common types of coverage when it comes to delaying Part B.
| Topic | Usually lets you delay Part B | Usually does not |
|---|---|---|
| Your own job | Group health plan while you are still actively working | Coverage that continues only because you used to work there |
| Spouse's job | Group health plan through your spouse's current employment | Coverage from a spouse's former job after they have retired |
| COBRA | Not applicable | COBRA continuation coverage does not count as coverage based on current employment |
| Retiree coverage | Not applicable | Retiree health benefits do not count as coverage based on current employment |
| Individual coverage | Not applicable | A plan you buy on your own, such as through Pennie, does not count |
Special situations, such as federal employee benefits, TRICARE or VA coverage, have their own rules. If one of those applies to you, we can go through it together.
A timeline from your 65th birthday to retirement
How the pieces usually fit together for someone who keeps working past 65 with group coverage from a larger employer.
Before your Initial Enrollment Period
Ask your benefits office how the plan works with Medicare and whether it expects you to enroll in Part B. Write down the answers and who gave them.
During your Initial Enrollment Period
Decide about Part A and Part B. Many people take Part A, which usually has no monthly premium, and wait on Part B. If you contribute to a health savings account, check the timing first (see the questions below).
While you keep working
Stay on the employer plan and confirm each year that its drug coverage is creditable, meaning it is expected to pay at least as much as standard Medicare drug coverage. Your plan usually sends a notice about this.
A few months before you retire
Choose a Part B start date so Part B begins the first of the month after your work coverage ends, with no gap in between. Ask your employer to complete the form confirming your dates of coverage.
Before work coverage ends
Plan your drug coverage and any supplemental coverage so nothing has a gap, since there is a limited window to join a Medicare drug plan without a penalty. Your Medigap open enrollment period begins once you are 65 or older and enrolled in Part B.
When work coverage ends
You have 8 months after your employment or coverage ends, whichever happens first, to enroll in Part B. Signing up before the work coverage ends can help avoid a gap, and we can help you keep track of these dates.
How this might look for two neighbors
Imagine Carol, who turns 65 in May and works full time at a Lancaster County manufacturer with a few hundred employees. She signs up for Part A, keeps her work plan and waits on Part B. When she retires the following year, she enrolls in Part B so it starts the first of the month after her work coverage ends. Because her coverage was based on current employment, she uses a Special Enrollment Period and no late penalty applies for that delay.
Now say Dale, her neighbor, retires at 64 and keeps his former employer's plan through COBRA. COBRA is not coverage based on current employment, so his Initial Enrollment Period is the window that applies to him. If he lets it pass, he could have a gap in coverage and a late enrollment penalty that can last as long as he has Part B.
Both examples are hypothetical. The difference comes down to whether the coverage was tied to an active job.
Questions to ask your employer's benefits office
These questions tend to surface the details that decide whether waiting on Part B fits your situation.
- How many employees does the company have for Medicare purposes?
- Does our group plan pay first or second once I am eligible for Medicare?
- Does the plan expect employees 65 or older to enroll in Part B?
- Is my coverage based on current employment, or is it retiree coverage?
- Is the drug coverage creditable, and can I get that notice in writing?
- If I contribute to a health savings account, when should contributions stop?
- On what exact date will my coverage end when I retire?
- Who will complete the employment information form I need for Part B?
- What happens to my spouse's coverage when I retire?
Keep proof of your work coverage When you sign up for Part B later, Social Security will ask for proof of group health coverage based on current employment. Your employer usually fills out a form confirming the dates. Copies of insurance cards, benefits letters and pay records showing health premiums can help if that form is hard to get.
Common follow-up questions
Related Medicare guides
When to sign up for Medicare in PA
How the Initial Enrollment Period works and what to think about as 65 approaches.
Read the guideTurning 65 in Lancaster County
A plain-English starting point for your first steps into Medicare.
Read the guideMedicare Part D in Pennsylvania
How drug coverage works and what creditable coverage means.
Read the guideMedicare Supplement plans in PA
How standardized Medigap plans work alongside Original Medicare.
Read the guideQuestions about your situation?
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