Medicare Guide

Do I Need to Sign Up for Medicare If I Am Still Working at 65?

Medicare eligibility often begins at 65, but employer coverage can change the timing decision. The key is whether the coverage is based on current employment, because COBRA, retiree coverage, marketplace coverage, and HSA contributions can create different risks.

Reviewed by John Schenk, Licensed Insurance Agent since 2008 · Published May 15, 2026 · Last updated August 14, 2026

Quick answer

If you are still working at 65, your Medicare timing depends on the kind of employer coverage you have.

Some people with qualifying active employer group coverage can delay Part B. Others should enroll when first eligible. The answer can depend on employer size, whether the coverage is based on current employment, HSA contributions, COBRA, retiree coverage, and whether Medicare would pay first or second.

Key takeaways

Current employer group coverage can sometimes let people delay Part B without a penalty.
COBRA and retiree coverage should not be treated the same as coverage based on current employment.
People with HSA contributions need to review Part A timing carefully.
When current employment or group coverage ends, many people have an 8-month Special Enrollment Period for Part B.
Drug coverage should be checked separately because Part D has its own creditable-coverage rules.

2026 cost snapshot

The numbers people usually ask about first

Medicare costs can change each year. These figures give you the starting point before we compare the plan details that depend on your county, prescriptions, doctors, and coverage path.

Part B premium

$202.90/moMost people pay this standard Part B premium in 2026, so delaying can matter if employer coverage is valid.

Working SEP

8 monthsCMS describes an 8-month SEP after current employment or group health plan coverage ends, whichever comes first.

COBRA

Not current workMedicare.gov warns COBRA does not extend the limited time to sign up for Part B.

HSA timing

Review earlyPart A enrollment can affect HSA contribution eligibility, especially around retirement or Social Security.

Do not assume everyone should enroll the same way at 65

Some people should enroll in Medicare when first eligible. Others can delay some parts because they are still actively working and have group health plan coverage based on current employment. The wrong assumption can create penalties, gaps, or unnecessary premiums.

Part A and Part B have different timing questions

Part A is often premium-free, but Part B usually has a monthly premium. Some people enroll in Part A and delay Part B. Others delay both because they contribute to an HSA. Still others need both parts because Medicare should be primary. The correct path depends on the employer coverage and the person's goals.

Employer size can matter

Large-employer coverage and small-employer coverage can coordinate with Medicare differently. People should ask the employer benefits administrator how the group plan coordinates with Medicare for someone who is 65 or older. The question is not just whether coverage exists, but whether Medicare should be primary.

Current employment is the key phrase

CMS says people who delayed Part B because they were covered under a group health plan based on current employment may qualify for a Special Enrollment Period. Coverage from a former job, retiree plan, or COBRA can feel similar, but it may not protect the timing in the same way.

COBRA can be a trap

Medicare.gov says you have up to 8 months after you stop working or lose health insurance, whichever happens first, to sign up for Part B without a penalty, whether or not you choose COBRA. COBRA does not create a new Part B delay window after it ends. That makes COBRA timing especially important.

HSA contributions need early review

People who contribute to a Health Savings Account should review Medicare timing before enrolling in Part A or applying for Social Security. Medicare enrollment can affect HSA contribution eligibility, and retroactive Part A can create issues if contributions continue too long.

Drug coverage should be checked separately

Part D has its own late-enrollment penalty rules. Employer or union drug coverage may be creditable, but that should be confirmed through the plan's creditable coverage notice. Do not assume medical coverage and prescription coverage follow the same rule.

Special enrollment rules can help, but only if used on time

People with qualifying current-employment coverage may have a Special Enrollment Period when that employment or group coverage ends. The timing should be planned before the coverage ends so Part B, Part D, Medicare Advantage, or Medicare Supplement decisions do not get rushed.

Go deeper

Related Medicare guides

Use this page as your Medicare starting point, then jump into the specific topic that matches your situation.

Common questions

Questions people usually ask next

These answers are a starting point. Medicare details can change based on timing, other coverage, and where you live.

Can I delay Part B if I am still working?

Possibly. If you have qualifying group health plan coverage based on current employment, delaying Part B may be appropriate. Employer size and coverage type should be reviewed.

Does COBRA let me delay Part B?

COBRA should not be treated the same as coverage based on current employment. Medicare.gov says COBRA does not extend the limited time to sign up for Part B.

Can I keep contributing to an HSA after enrolling in Medicare?

Generally no. Medicare enrollment can affect HSA contribution eligibility, so HSA timing should be reviewed before enrolling in Medicare or applying for Social Security.

Official references

Sources checked for this guide

These guides are written in plain English, but the 2026 cost figures and coverage rules should stay tied to official Medicare and CMS source material.

Medicare.gov: Working past 65 Medicare.gov: COBRA coverage CMS: Original Medicare eligibility and enrollment Medicare.gov: When can I sign up for Medicare?Medicare.gov: Avoid late enrollment penalties

About the reviewer

John Schenk · Licensed Insurance Agent since 2008 · Nevada license #603197

John Schenk is a trainer and Agent Relationship Manager for The Medicare Store. He has been a licensed insurance agent since 2008 (Nevada license #603197). He trains and supports agents who sit with Medicare Store clients every day.

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