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What happens if I take COBRA instead of Medicare?

What happens if I take COBRA instead of Medicare?

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Last updated: 
April 10, 2026
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The short answer

Taking COBRA instead of Medicare when you turn 65 is usually a costly mistake. COBRA is not considered creditable coverage for Medicare purposes, and you could face permanent late enrollment penalties.

The full explanation

COBRA lets you keep your employer health insurance for a period after leaving a job, but it comes with a catch most people don't realize. Once you turn 65 and are eligible for Medicare, COBRA is no longer considered creditable coverage for Part B. That means the clock starts ticking on your Medicare enrollment window whether you take COBRA or not.If you skip Part B to keep COBRA and miss your Initial Enrollment Period, you'll likely face a late enrollment penalty when you do sign up. That penalty is 10 percent added to your Part B premium for every 12-month period you delayed. It stays with you for as long as you have Part B, which for most people means the rest of their life.The situation that trips people up most often involves people who retire at 65 and assume COBRA is a safe bridge. It can feel like real insurance coverage, because it is your same old plan. But Medicare treats it differently once you're eligible for Medicare.The rule that lets you delay Medicare without penalty, avoiding the late enrollment penalty, applies when you have coverage through active employment, meaning you or a spouse is still working and the insurance comes through that current job. COBRA is not active employment coverage.If you're in this situation, sign up for Medicare on time, and then evaluate whether COBRA makes sense as a secondary supplement for a short period while you sort out additional coverage.

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In 

Ohio

 specifically

In Ohio, Medicare plan options usually vary by county, and larger metro areas like Franklin, Cuyahoga, Hamilton, and Summit tend to have more Medicare Advantage competition than smaller counties. Ohio residents can also get free Medicare counseling through the Ohio Senior Health Insurance Information Program.

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What this means for you

For you, this means if you're turning 65 and considering COBRA, talk to a Medicare counselor before your Initial Enrollment Period closes, because the penalty for getting this wrong doesn't go away.

Related Questions

Is COBRA considered active employer coverage for Medicare purposes?

Can I keep my employer coverage and delay Medicare?

What is the Part B late enrollment penalty and how long does it last?

How long is my Special Enrollment Period after losing employer coverage?

Still have questions about Medicare?

Book a review with a licensed Medicare advisor.

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Decision area Tool What it answers
Enrollment Initial Enrollment Period Calculator When your 7-month Medicare eligibility window begins and ends based on your 65th birthday
Enrollment When Should I Sign Up for Medicare? The best time to enroll based on your work status, other coverage, and age
Enrollment Special Enrollment Period Checker Whether a life event qualifies you for enrollment outside the standard windows
Enrollment Late Enrollment Penalty Checker How much extra you'll pay monthly if you missed your enrollment window
Enrollment Part B Penalty Calculator The exact 10%-per-year premium increase for delayed Part B enrollment
Enrollment Part D Penalty Calculator The 1%-per-month premium increase for gaps in creditable drug coverage
Costs Cost Scenario Planner Estimated annual spending across plan types at different health utilization levels
Costs Advantage vs. Medigap Cost Comparison True cost difference between Medicare Advantage and Original Medicare with Medigap
Costs IRMAA Calculator Whether your income triggers higher Part B and Part D premiums
Costs Part A Premium Estimator Your monthly Part A premium based on work history and quarters of coverage
Costs M3P Calculator How the Medicare Prescription Payment Plan smooths your drug costs into monthly payments
Coverage Doctor & Drug Assessment Whether your providers and prescriptions are covered by a specific plan
Coverage Part D Shopping Tool Which Part D plan has the lowest total annual cost for your specific medications
Coverage Travel & Network Risk Assessment How your coverage works outside your home area and which plan types travel best
Employer/COBRA COBRA vs. Medicare Why COBRA can trigger permanent Medicare penalties and how costs compare
Employer/COBRA Employer Coverage vs. Medicare Whether your employer plan or Medicare is primary and when to transition
Employer/COBRA HSA & Medicare Compatibility How Medicare enrollment affects HSA eligibility and what to do before enrolling
Planning Caregiver Readiness Checklist Whether you have everything in place to help a loved one with Medicare decisions
Planning Document Gatherer Which documents you need to have ready before enrolling or changing plans
Planning Medigap Fit Assessment Whether Medigap or Medicare Advantage is the better fit for how you use healthcare
Planning Medigap Open Enrollment Window Whether you're inside your one-time guaranteed issue window for Medigap
Planning Medicare Savings Program Eligibility Whether your income qualifies you for help paying Medicare premiums and cost-sharing

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