When Should I Sign Up for Medicare?
Key Points
- Your Initial Enrollment Period is a seven-month window surrounding your 65th birthday.
- Some people are enrolled in Medicare automatically; others must actively sign up.
- Enrolling during the first three months of your IEP gives you the earliest possible start date.
Timing your Medicare enrollment correctly is one of the most important decisions you'll make as you approach 65. Sign up too late and you could face permanent penalties or gaps in coverage.
The Initial Enrollment Period (IEP)
When you turn 65, you become eligible for a seven-month Initial Enrollment Period. It begins three months before the month of your 65th birthday, includes your birthday month, and ends three months after. This is your first and often most important window to enroll in Medicare without risking late enrollment penalties.
If you enroll in the first three months of your IEP, your coverage typically starts on the first day of your birthday month. If you wait until your birthday month or the months after, your start date is pushed back — meaning you could have a gap in coverage if you're relying on Medicare as your primary insurance.
Are You Enrolled Automatically?
Some people are automatically enrolled in Medicare Parts A and B without having to take any action. This typically happens if you are already receiving Social Security or Railroad Retirement Board benefits at least four months before turning 65. In that case, your Medicare card will arrive in the mail about three months before your 65th birthday.
If you are not yet receiving Social Security — for example, if you delayed claiming benefits — you will need to actively enroll in Medicare during your IEP. You can do this online at ssa.gov, by calling Social Security at 1-800-772-1213, or by visiting your local Social Security office.
What If You're Still Working at 65?
If you or your spouse are still working and covered by a group health plan through an employer with 20 or more employees, you may be able to delay Part B enrollment without a penalty. In this case, your employer coverage is considered primary and Medicare is secondary.
However, this only applies if the employer plan is considered "creditable" coverage. Once that employer coverage ends, you'll have a Special Enrollment Period to sign up for Part B without penalty. Navigating this situation correctly requires looking at your specific plan details — and getting it wrong can result in both a coverage gap and a permanent premium penalty.
Part D Timing Matters Too
Don't forget about prescription drug coverage. If you don't enroll in a Part D plan when you first become eligible — and you don't have other creditable drug coverage — you may face a late enrollment penalty that gets added to your Part D premium permanently.
Even if you don't take many medications right now, enrolling in a low-cost Part D plan when you first become eligible is often the smart move. We help clients evaluate their medication lists and find plans that fit — at no cost to you.
Still Have Questions?
Our licensed Medicare brokers are here to help — at no cost to you.