Retiring after 65? Plan the move from employer coverage to Medicare.

Where would you like to start?

Start with the question that is most urgent for you.

When should I enroll in Part B?

If you have been working past 65 with employer or union coverage from your own current employment, you have been in a Special Enrollment Period protection zone. You can delay Part B without penalty for as long as that coverage is active based on current employment.

When you retire — or when that employment-based coverage ends — your Special Enrollment Period opens. You generally have 8 months after the first of two events: the date your employment ends, or the date your employer coverage ends.

The 8-month window is generous — but it is not unlimited. Missing it can create a coverage gap while you wait for the General Enrollment Period and the month after you sign up.

Does COBRA protect me from a Part B penalty?

COBRA does not protect you from a Part B late enrollment penalty after you retire. This is one of the most consequential misunderstandings in Medicare enrollment.

Here is what happens:

• When you retire and your employment ends, your 8-month Special Enrollment Period for Part B begins — whether or not you elect COBRA.
• COBRA is continuation coverage from your former employer. It is not coverage based on current employment.
• If you elect COBRA and use those months without also enrolling in Part B, the 8-month clock is still running.
• If the 8-month SEP closes while you are on COBRA without Part B, you lose the SEP. You will pay the late enrollment penalty — permanently — and face a gap in coverage until the next General Enrollment Period cycle.

When does my Special Enrollment Period start, and how long does it last?

Your Part B Special Enrollment Period ends 8 months after your employer coverage based on current employment ends — or after the employment ends, whichever happens first.

It lasts 8 months from that point.

1. Identify the triggering event. That is the date your employment ends or the date your employer coverage ends — whichever happens first. Use that event to measure the 8-month deadline.
2. Count 8 months forward. Your SEP closes at the end of the 8th month. Enroll before that date.
3. Apply to Social Security in advance. Medicare Part B enrollment is processed by Social Security, and processing takes time. Apply 2 to 3 months before you want coverage to start — ideally before your employer coverage ends — so your Medicare is active the day after your previous coverage ends.
4. Get confirmation in writing. Once you apply, confirm the Part B start date with Social Security before your employer coverage ends. Do not assume it is processing correctly.

When does my six-month Medigap window start?

Your open enrollment window for Medigap — the period when an insurer must sell you any Medigap plan without medical underwriting — is tied to when Part B becomes effective, not to when you turn 65.

The window is 6 months from the date your Medicare Part B coverage begins. It opens once, and it does not reopen under normal circumstances.

For someone retiring after 65, this means:

• The 6-month Medigap window starts the month Part B begins — which may be well after your 65th birthday if you worked past 65.
• Unlike the Part B window (8 months), the Medigap window is 6 months and cannot be extended. Miss it, and Medigap is available only with medical underwriting in most states — meaning a company can decline you or charge more based on health.
• Part B and Medigap enrollment decisions are separate but connected. Start both conversations at the same time.

How do I avoid a gap between employer coverage and Medicare?

A coverage gap — even a short one — means any medical bills during that period are yours alone. Avoiding it requires coordinating the end date of employer coverage with the start date of Medicare.

1. Confirm your employer coverage end date. Is it your last day of work? The last day of the month? The last day of the following month? Employers handle this differently. Know the exact date.
2. Submit your Part B enrollment application 2 to 3 months before that date. You can apply before your coverage ends — and you should, to avoid a gap. Social Security can schedule your Part B start for a future date.
3. Coordinate drug coverage at the same time. If you are enrolling in a Medicare Advantage plan with drug coverage, or a stand-alone Part D plan, start that enrollment promptly. After employer or union coverage ends, the plan-enrollment window lasts for 2 full months after the month the coverage ends.
4. Do not elect COBRA as a bridge unless Part B is already active. COBRA as the only coverage during a transition is fine for a brief overlap — but do not use it as a substitute for enrolling in Medicare during your SEP.
5. Confirm your Medicare start date in writing before your coverage ends. Social Security sends confirmation. Have it in hand before your last day of employer coverage.

What should my spouse do if our ages are different?

Medicare enrollment is individual. Your spouse's Medicare timeline depends on their own age, their own coverage, and whether they have their own work history.

Common situations where ages differ:

• Your spouse is under 65 and covered under your employer plan. When your employer coverage ends, your spouse loses that coverage too. They are not yet Medicare-eligible. They will need separate coverage — marketplace coverage, COBRA, or a spouse's employer plan if available — until they reach 65.
• Your spouse is over 65 but has been covered under your employer plan. When your coverage ends, their Special Enrollment Period for Part B opens as well — if they delayed Medicare because of your employer coverage. They should enroll in Part B during the same window you do.
• Your spouse already has Medicare. No action needed on their side. Your transition does not affect their coverage.

Tell me both of your ages and current coverage situations, and I can tell you what the transition looks like for each of you.

What should I have sorted out before my last day of work?

Before your retirement date arrives:

1. Know your exact employer coverage end date.
2. Know whether Part B is already active or whether you need to apply.
3. Apply for Part B 2 to 3 months before coverage ends, not the day of.
4. Decide between Medicare Advantage and Original Medicare + Medigap before your Medigap window opens.
5. Know your spouse's coverage situation and whether they need separate action.
6. Have a Part D plan selected — or know that your Medicare Advantage plan includes drug coverage — before your employer drug coverage ends.
7. Confirm everything in writing before your last day of work.

This transition has more moving parts than most — but each one has a clear answer once you know the sequence.

Who wrote this?

Quoted on Medicare in Newsweek, NTD, and InsuranceNewsNet — as commentary, not endorsement.

Makaistorya ko og Binisaya.

A first conversation is mostly questions. Your retirement date, your coverage situation, your spouse's age, your county. Retirement-transition situations are specific to the timeline — I will tell you what the sequence looks like for yours.

Want help mapping your retirement transition?