Turning 65 used to mean one simple question: “Am I signing up for Medicare or not?” But if you are still working, or covered by your spouse’s employer plan, the better question is: Who pays first, and what happens if I get it wrong?
I have seen careful people do the “safe” thing and accidentally waste $4,000 to $5,000 a year by paying for Medicare and an employer plan that did not need Medicare at all. On the other side, I have also seen people delay Medicare without realizing their employer coverage was not set up to protect them, and that can lead to gaps and late penalties.
Let’s make this simple.
Can You Stay on Employer Insurance After 65?
Yes, you can often keep employer coverage past 65. The key is whether your coverage is considered job-based coverage from current employment and whether it is coming from a large employer. Medicare’s rules can be different if the employer has fewer than 20 employees, because your job-based plan may not pay the way you expect unless you have both Part A and Part B. (Medicare)
The 3 Questions That Decide Whether You Can Delay Medicare Part B
If you want to delay Medicare Part B without penalties, check these three items:
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How many employees does the company have?
If the employer has less than 20 employees, Medicare rules often push you toward enrolling in Part A and Part B so you are fully covered. -
Is your coverage truly based on active employment?
When your job ends, Medicare’s 8-month Special Enrollment Period to sign up for Part B starts, even if you choose COBRA or other coverage that is not Medicare. -
Is your prescription coverage “creditable”?
If your employer drug coverage is creditable, you can usually delay Part D without the late penalty, as long as you do not go more than 63 days without creditable drug coverage. Your plan must tell you if it is creditable and will send that notice each year.
The Most Common (and Expensive) Mistake: Paying for Both
A lot of people end up with double coverage: they keep paying for the employer plan and also pay for Medicare Part B (and sometimes more). Most of the time, that extra spending does not improve coverage. It just increases monthly premiums.
This mistake is especially common when someone starts Medicare “just because they turned 65,” but their employer plan already provides strong coverage as long as they are actively working.
Should You Delay Part B?
| Question | If YES | If NO |
|---|---|---|
| Does the employer have 20+ employees? | Delaying Part B may be possible | You may need Part A and Part B for full protection |
| Is the coverage based on current employment (not retiree coverage or COBRA)? | You may qualify for the Part B Special Enrollment Period | Your SEP rules may not protect you the same way |
| Is your drug coverage creditable? | You can usually delay Part D without penalty if you stay continuously covered | Going 63+ days without creditable coverage can trigger a penalty |
| Are you already receiving Social Security at least 4 months before 65? | You may be automatically enrolled in Part A and Part B | You may need to actively enroll when ready |
If You’re Already on Social Security, Watch This One Detail
If you are receiving Social Security benefits at least 4 months before you turn 65, Medicare generally automatically enrolls you in Part A and Part B and mails your Medicare card before coverage starts. (Medicare)
That is helpful, but it can also cause accidental double coverage if you meant to delay Part B while staying on an employer plan. This is one of the most important “heads up” moments in the whole process.
When Enrolling in Medicare While Still Working Can Save You Money
Sometimes Medicare is the better deal even before you retire. A quick way to sanity-check the decision is to compare:
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Your employer premium (per person) + deductible + out-of-pocket exposure
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Medicare Part B premium + a Medicare Supplement or Medicare Advantage plan structure + drug coverage
For some families, one major claim (like a surgery) is enough to show that the employer plan is costing far more than expected.
How to Get Help If You’re Enrolling for the First Time
If you are enrolling in Medicare for the first time and want help making a confident decision, The Medicare Coach can help with our Medicare Enrollment Concierge services, where we look at the full picture so you can avoid penalties, gaps, and “double-paying” mistakes.
Conclusion
Employer coverage after 65 can be a great option, but only if you confirm who pays first, whether you can safely delay Part B, and how your drug coverage is classified. If you are not sure, get clarity before you default into double coverage or miss an enrollment window, and if you want a second set of eyes from The Medicare Coach, our Medicare Enrollment Concierge can walk you through the decision so you feel confident you are doing it right, so what situation are you in right now: still working, on a spouse’s plan, or getting ready to retire?
I turned 65 last month and tried to delay Medicare because I’m covered under my spouse’s health insurance with free medication. Last year I my salary was $73,000 I switched jobs and I’m strictly commission I’ve gone from $5600 a month to $$2500 a month and my monthly Medicare cost is $550 a month which is insane. The government is putting me in more debt with insurance I don’t need. How can I fix this issue?
Thanks for sharing David. Does your new job offer health insurance that meets Medicare rules? If so can can cancel/delay your Medicare Part B without penalty. I cover this in more detail on my free online workshop. https://join.themedicarecoach.com/free-workshop
This is very helpful. Need to get ahold of my employer and find out about insurance and prescriptions
This is very helpful. Need to get ahold of my employer and find out about insurance and prescriptions
I’m still working. I turned 65 last April. I have my employer insurance as primary and Medicare as secondary .Wanting to know if I am overpaying for coverage.
Good question, when you say you have Medicare as primary, do you have both Medicare Part A and B? It can be fine to have Medicare Part A only as long as 1) you have employer health insurance that meets Medicare rules 2) you get Part A for free 3) you don’t put money into a Health Savings account. You can be overpaying if you are paying for both employer health insurance and Medicare Part B
Succinct and helpful!
Succinct and helpful!
Glad you found this helpful!
I’m turning 65 in the beginning of March. Thinking about retiring in May or possibly delaying my retirement until next March when I turn 66. I’m not sure what to do about part “B” or any other part.
Also which coverage would be better, Aenta or something else. Looking for best coverage that AFFORDABLE.
I’m turning 65 in the beginning of March. Thinking about retiring in May or possibly delaying my retirement until next March when I turn 66. I’m not sure what to do about part “B” or any other part.
Also which coverage would be better, Aenta or something else. Looking for best coverage that AFFORDABLE.
The Medicare coverage you need will depend on if you have employer health insurance that meets Medicare rules. When asking about “affordable” plans, it’s good to consider premiums, copays, out-of-pocket costs, denied claims, etc
The Medicare coverage you need will depend on if you have employer health insurance that meets Medicare rules. When asking about “affordable” plans, it’s good to consider premiums, copays, out-of-pocket costs, denied claims, etc
I am still working and turned 65 in July 2025. I have full credible coverage at a low cost. I did not sign up for A or B when I turned 65.
My plan is to sign up when I stop working most likely the end of this year or July 2027 at my full retirement age. I know there is a special form to submit when applying after 65.
I am still working and turned 65 in July 2025. I have full credible coverage at a low cost. I did not sign up for A or B when I turned 65.
My plan is to sign up when I stop working most likely the end of this year or July 2027 at my full retirement age. I know there is a special form to submit when applying after 65.
I retained the Medicare Coach a year and a half ago and decided to keep working until my FRA. What’s the cost to renew? My employer was acquired by a much larger firm and I opted for the PPO with an HSA option. I was pleased with your services and I’d like to stick with it since I’m approaching my FRA.
It’s great to hear from you Robert. There is likely no additional cost to join us. The Enrollment Concierge covers you until you eventually join Medicare, so your initial membership is likely still active for you. You can call us so we can help 785-537-6225
Once I turn 65, Can I still sign up for Medicare (Part A only) while still have coverage through my employer’s insurance plan? (Employees more than 20) and does it cost to get Medicare Part A?
Yes, that could be an option to only get Part A while still working. I recommend you double check your employer plan meets Medicare rules before you finalize that decision. Additionally you may not want to get Part A if you are putting money into a Health Savings Account. This blog helps talk about your Part A (and other) costs https://www.themedicarecoach.com/medicare-costs-in-2026/
Hi, I was on the seminar earlier today 1/ REa30/26. I am currently covered under my wife’s health insurance which meets the Medicare criteria. I turn 65 in August. I am not on social security or working. I understood that I could put off enrolling in Medicare A and B until such time my wife retired in June 2027. Reading this article seems to imply I need to enroll in A before I turn 65. Is that correct?
Thank you and regards,
John
Good question, as long as your wife’s employer plan meets Medicare rules you can delay Medicare. It’s hard to give you exact advice without knowing the exact details of her plan.