Can I stay on my spouse's employer plan instead of taking Medicare?
The short answer
Yes, in many cases you can delay Medicare if you're covered by a spouse's active employer plan. But the rules depend on the employer's size, and getting them wrong can trigger permanent penalties.
The full explanation
If your spouse is still working and you're covered under their employer health plan, you may be able to delay Medicare Part B without penalty. The employer plan acts as what Medicare calls 'creditable coverage,' meaning it's considered comparable to Medicare. This exception applies as long as the employer has 20 or more employees. Smaller employers are a different story, and in that case Medicare is actually supposed to pay first, so delaying Part B could leave you with unexpected bills.Part A, which covers hospital stays, is usually free for most people, so many enroll in it even while keeping employer coverage. It rarely hurts to have it.The important thing to get right is timing. When your spouse retires or loses that employer coverage, you have an 8-month Special Enrollment Period to sign up for Medicare Part B without a penalty. Miss that window and the late penalty can follow you for the rest of your life, adding 10 percent to your premium for every 12-month period you were late.Before you decide to delay, ask your spouse's HR department to confirm in writing whether their plan is the primary or secondary payer for you. That answer drives everything.
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