WARN Act and Medicare: What Happens to Your Coverage at 65 After a Layoff

A WARN notice is stressful at any age, but for workers aged 65 or older it carries a second deadline that has nothing to do with the layoff itself: the Medicare enrollment clock. Get the timing wrong and you can face a permanent late-enrollment penalty on top of everything else.

The latest Layoff Atlas figures show 676 WARN notices covering 64,774 reported workers in the current 90-day window, with 28 counts unavailable. California (18,261 workers) and Washington (17,306) lead the state ranking, followed by Illinois (3,677), Texas (3,114), and Virginia (2,373). Upcoming effective weeks peak at 6,617 workers in the week of November 9. These are reported plans, not confirmed job losses, and coverage and reporting rules vary by state. But for any worker in that group who is 65 or older, the Medicare rules below apply regardless of which state the filing came from.

Many workers past 65 stay on an employer plan instead of enrolling in Medicare. That delay is allowed while qualifying employer coverage lasts — but a layoff ends that coverage, and the delay exception with it.

The 8-month Part B special enrollment period

When employment or your employer health coverage ends, you get an 8-month Special Enrollment Period to sign up for Medicare Part B. The clock starts the month after employment ends or the month after employer coverage ends, whichever comes first. Part A, the hospital coverage, is premium-free for most people with enough work history and can usually be taken at 65 even while still working. Part B, which covers doctor visits and outpatient care, is the one where timing matters: delaying it past the special enrollment period triggers a late-enrollment penalty of 10 percent of the standard premium for every full 12 months you were eligible but did not enroll — and that penalty lasts for as long as you have Part B.

Do not assume the 60-day WARN notice period and the Medicare window run together. The WARN notice tells you when the layoff takes effect; the Medicare window runs from when your employer coverage actually ends. Check both dates with your employer's benefits team and mark the Medicare deadline separately.

The COBRA trap

This is the mistake that catches the most people. After a layoff, you will usually be offered COBRA continuation coverage, which lets you keep the same employer plan for up to 18 months. It feels like the safe choice, especially if you are mid-treatment with a particular doctor. But for Medicare purposes, COBRA does not count as employer coverage, and taking COBRA does not extend your 8-month Part B enrollment window.

That means a worker who takes COBRA for a year and then tries to enroll in Part B can discover two unpleasant facts at once: the special enrollment period has already expired, and a late-enrollment penalty now applies. The safer sequence for most workers 65 and older is to enroll in Medicare during the special enrollment period and use COBRA only as a bridge before Medicare starts, or for family members not yet Medicare-eligible.

If your employer has fewer than 20 employees

Company size changes who pays first. At employers with 20 or more employees, the employer plan generally pays before Medicare while you are still working. At employers with fewer than 20 employees, Medicare is usually the primary payer even before a layoff, so workers at small employers should generally enroll in Part B at 65 rather than relying on the employer plan alone.

Part D prescription coverage: 63 days

Prescription drug coverage has its own, much shorter clock. If you lose creditable prescription coverage — coverage at least as good as standard Medicare drug coverage — you have 63 days to enroll in a Part D plan before a late-enrollment penalty can apply. Check whether your employer plan counts as creditable, and set the 63-day deadline as soon as coverage ends.

What about Social Security?

A layoff near retirement age also forces a Social Security decision, but it is separate from Medicare. You can claim Social Security as early as 62, but claiming before full retirement age — 67 for anyone born in 1960 or later — permanently reduces the monthly benefit, and the earnings limit can temporarily reduce benefits further if you keep working. There is no requirement to claim Social Security and enroll in Medicare at the same time.

A short checklist for the notice period

First, confirm the exact date your employer health coverage ends, not just your last day of work.
Second, mark the 8-month Part B window and the 63-day Part D window on a calendar.
Third, decide about COBRA only after comparing it with Medicare, remembering that COBRA does not extend the Medicare deadline.
Fourth, if you are under 65, Medicare generally does not apply unless you qualify through disability; the usual 60-day marketplace special enrollment period after losing job-based coverage is the relevant deadline instead.
Finally, keep copies of every notice, COBRA election form, and enrollment confirmation — if a penalty dispute ever arises, those dates are your evidence.

These are reported plans, not confirmed job losses. This article is general information, not legal or benefits advice; enrollment rules can depend on your specific plan and work history.

Data source: Layoff Atlas