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Does COBRA count for Medicare? (No, and here's what to do)
Last checked October 5, 2026 against the official rules. Sources are listed at the end.
No. COBRA doesn't let you put off Part B. Your 8-month window to sign up starts when your job ends, not when COBRA ends. If you wait for COBRA to run out, you'll likely miss it, which can mean months without coverage and a penalty for as long as you have Part B.
Why COBRA is a trap
COBRA lets you keep your old job's health plan after you leave, usually paying the full cost yourself. It feels like the same coverage you had at work, so it's easy to assume it lets you wait on Medicare. It doesn't.
Medicare only lets you delay Part B while you have coverage from a job you still have. COBRA is coverage from a job you've left.
When your clock really starts
If you were working past 65, your 8-month window to sign up for Part B starts the month after your job ends, or after the job's regular coverage ends, whichever is first. Starting COBRA doesn't pause that clock.
Example. Robert, 66, retires in March 2027 and takes 18 months of COBRA.
His penalty-free window runs April through November 2027. If he waits until COBRA ends in September 2028, he's missed it. He'd have to sign up in the next January-to-March period, with coverage starting the month after, and pay a 10% penalty for each full year he went without Part B.
If you're turning 65 while on COBRA
Sign up for Medicare during your sign-up window: the 7 months around your 65th birthday. Once you have Medicare, Medicare pays first and COBRA pays second. Because COBRA expects Medicare to pay first, it may pay very little if you skip Part B.
Can I keep COBRA after Medicare starts?
Often, yes, and it can be worth it for a spouse who isn't 65 yet, or for dental and vision. But:
- If you're already on Medicare when you become eligible for COBRA, you can usually keep both.
- If you get Medicare after starting COBRA, your COBRA may end early. Your spouse and children may still be able to keep it.
- COBRA's drug coverage may count as "creditable" for Part D. Check the letter from the plan. If it doesn't, join a Part D plan when Medicare starts.
What to do
- Sign up for Part A and Part B when your job ends, or at 65 if you're already on COBRA.
- Choose a drug plan, or check that COBRA's drug coverage is creditable.
- Then decide whether keeping COBRA for anything else is worth the cost.
Check whether you'd owe a penalty
Enter your birthday and when your job coverage ended. We'll show whether you'd owe a late penalty, and how much.
Sources
- Medicare.gov: COBRA coverage
- Medicare.gov: Avoid late enrollment penalties
- U.S. Department of Labor: COBRA continuation coverage
This guide explains the general rules. It isn't legal, tax or insurance advice, and your situation may differ. Settled Years doesn't sell insurance or take commissions.