when to sign up for medicare if still working

If you’re still working at 65, the right time to sign up for Medicare depends on the size of your employer and whether you have creditable employer coverage. In many cases, you can delay Part B without a penalty until you stop working or lose that coverage, then use a Special Enrollment Period.

Quick Scoop

• Enroll at 65 if your employer coverage is not considered creditable, or if you work for a smaller employer where Medicare is supposed to be primary.

• You can usually delay Part B if you have employer-sponsored coverage from current employment and that coverage remains creditable.

• You have an 8-month Special Enrollment Period to sign up for Part B after active work or employer coverage ends.

• Part A may be free , so some people enroll in Part A at 65 even while still working, but the best move depends on HSA use and your specific coverage.

What usually applies

The simplest rule is this: if you are covered by a real employer group health plan from current work, you may be able to wait on Medicare Part B until you retire or lose that coverage. If your coverage is not from active employment, or if your employer is small enough that Medicare should pay first, you may need to enroll at 65 to avoid penalties and gaps.

Timing to remember

• Initial Enrollment Period: 3 months before your 65th birthday, your birthday month, and 3 months after.

• Special Enrollment Period: typically 8 months after your job-based coverage or active employment ends for Part B.

• General Enrollment Period: Jan. 1 to March 31 each year if you missed the other windows, though penalties may apply.

Practical tip

Before delaying, confirm with your benefits office whether your plan counts as employer coverage based on current employment. That one detail determines whether you can safely wait or should sign up at 65.

Bottom line

If you are still working and have solid employer coverage, many people wait on Part B until retirement; if you do not, sign up when first eligible at 65.