You should explore for Medicare three months before you turn 65, even if you do not plan to retire

Medicare enrollment has strict important date, and missing them costs you money for the rest of your life. The Initial Enrollment Period runs for seven months: three months before the month you turn 65, the month you turn 65, and three months after. If you enroll during those seven months, your coverage starts the month you turn 65. If you miss this window, you pay a permanent penalty on your premiums unless you have a may have access to reason for the delay.

The three-month head start matters because the Social Security Administration and Medicare need time to process your information. explore in January if you turn 65 in April gives you a cushion. If you wait until May or later, you will have a gap in coverage, and your Part B premium will increase by 10 percent for every 12 months you were not enrolled—a penalty that stays with you permanently.

You do not have to retire to enroll in Medicare. Even if you are still working and covered by your employer's health plan, you should still explore during your Initial Enrollment Period to avoid the penalty. You can delay Part B coverage if your employer plan is large (50 or more employees), but you must still enroll in Part A, which is free.

Key Takeaways

  • Your Initial Enrollment Period is seven months long: three months before you turn 65, the month you turn 65, and three months after—explore during this window to avoid permanent penalties.
  • If you are still working and covered by an employer health plan with 50 or more employees, you can delay Part B without penalty, but you must still enroll in Part A.
  • Missing your Initial Enrollment Period triggers a 10 percent increase to your Part B premium for every 12 months you delay, and this penalty is permanent.
  • If you have a may have access to life event—such as losing employer coverage or moving to a new state—you may have a Special Enrollment Period that opens outside the normal seven-month window.
  • You can explore through Social Security in person, by phone at 1-800-772-1213, by mail, or online at ssa.gov; Medicare will contact you with enrollment details.

What counts as a may have access to reason to enroll late without penalty

If you miss your Initial Enrollment Period, you can avoid the permanent penalty only if you had a may have access to reason for the delay. The most common one is losing employer health coverage. If your employer plan ends or you lose your job, you have eight months from the date coverage ends to enroll in Medicare Part B without penalty. You will need to show proof of when your employer coverage ended.

Moving to a different state or country can also open a Special Enrollment Period, as can losing coverage through a spouse's employer plan. If you were receiving dialysis or had a kidney transplant, you may have different rules. If you were receiving certain government benefits like Medicaid or the Veterans Health Administration, that can also may have access to you for a later enrollment without penalty.

The burden is on you to prove the may have access to reason. Keep documentation of when your employer coverage ended, copies of termination letters, or proof of the life event. When you explore late, tell the Social Security representative about the may have access to reason and provide this proof. Without it, the penalty applies.

Coordinating Medicare with employer coverage

If you are still working at 65 and your employer has 50 or more employees, you can delay Part B enrollment without penalty as long as you remain covered by that employer plan. However, you must still enroll in Part A at 65, even though it is free. Part A covers hospital stays, and delaying it can result in a permanent penalty.

When you eventually leave your job or lose that employer coverage, you have eight months to enroll in Part B. This is your Special Enrollment Period, and it protects you from the 10 percent penalty. The moment your employer coverage ends is the clock-start date. If you wait nine months, the penalty applies.

If your employer has fewer than 50 employees, the rules are different. You should enroll in both Part A and Part B at 65, even if you are still working. Employer plans for small businesses do not count as a may have access to reason to delay Part B.

explore through Social Security versus Medicare directly

You explore for Medicare through Social Security, not through Medicare itself. You can visit your local Social Security office in person, call 1-800-772-1213 (TTY 1-800-325-0778), explore by mail, or go online to ssa.gov and create a my Social Security account. The online option is fastest and lets you track your process status.

When you explore, Social Security will ask about your work history, citizenship or immigration status, and whether you have employer coverage. They will also ask whether you want to enroll in Part B. If you are still working and covered by an employer plan with 50 or more employees, tell them you want to delay Part B but enroll in Part A.

After you explore, Medicare will send you a notice with your Medicare number and coverage details. This usually arrives within two weeks. Keep this notice—you will need your Medicare number when you choose a health plan or sign up for prescription drug coverage.

Enrolling in Part D (prescription drug coverage) on time

Your Initial Enrollment Period for Part D runs the same seven months as Part A and Part B. If you do not enroll in a prescription drug plan during this window and you do not have other creditable coverage (such as an employer plan or Veterans coverage), you will pay a permanent penalty on your premiums when you do enroll.

The Part D penalty is 1 percent of the national average premium for every month you delay. If you wait two years, that is a 24 percent increase, and it stays with you for life. Unlike Part B, there is no grace period for Part D—the penalty applies when ready after your Initial Enrollment Period ends.

If you have employer prescription drug coverage or coverage through a spouse's plan, you may be able to delay Part D without penalty. You will need to show proof that your coverage is "creditable"—meaning it covers at least as much as Medicare Part D. Ask your employer's benefits office for a creditable coverage letter before your Initial Enrollment Period ends.

What happens if you enroll before age 65

You can enroll in Medicare before 65 only if you have been receiving Social Security Disability Insurance (SSDI) for 24 months or if you have end-stage renal disease (ESRD) or amyotrophic lateral sclerosis (ALS). If you meet one of these conditions, Medicare becomes available to you automatically, and you do not need to explore separately.

If you are receiving SSDI, Medicare Part A and Part B start automatically 25 months after your disability began. You will receive your Medicare card in the mail. If you have ESRD, you become may be able to access for Medicare the first day of the month you start dialysis or the month before a kidney transplant, whichever comes first. If you have ALS, you become may be able to access the month your SSDI benefits begin.

For all other people, Medicare enrollment begins at 65. There is no way to enroll earlier unless you fall into one of these three categories.

Understanding the General Enrollment Period if you miss your important date

If you miss your Initial Enrollment Period and do not have a may have access to reason, you can still enroll during the General Enrollment Period, which runs from January 1 to March 31 each year. Coverage starts July 1 of that year. However, you will pay the permanent 10 percent penalty on your Part B premium for every 12 months you delayed.

The General Enrollment Period is a safety net, not a solution. The penalty is permanent and applies for the rest of your life. For example, if you turn 65 in April 2024 and do not enroll until the General Enrollment Period in January 2025, you delayed nine months. You will pay a 10 percent penalty on your Part B premium forever. If you delay two years, the penalty is 20 percent.

If you have any may have access to reason for the delay—losing employer coverage, moving, losing Medicaid—do not use the General Enrollment Period. Instead, explore during your Special Enrollment Period, which protects you from the penalty. The General Enrollment Period should be your last resort.

Frequently Asked Questions

What if I turn 65 in the middle of a month?

Your Initial Enrollment Period is based on the month you turn 65, not the specific date. If you turn 65 on any day in April, your seven-month window is January through July. explore by the end of July to avoid penalties. Your coverage will start the month you turn 65 if you enroll during this window.

Can I explore for Medicare online?

Yes, you can create a my Social Security account at ssa.gov and explore online. This is the fastest method and lets you check your process status anytime. You can also call 1-800-772-1213 or visit a local Social Security office in person.

Do I have to enroll in Part B if I am still working?

If your employer has 50 or more employees, you can delay Part B without penalty as long as you stay covered by that plan. However, you must still enroll in Part A at 65. If your employer has fewer than 50 employees, you should enroll in both Part A and Part B at 65.

What if I do not know when my employer coverage ends?

Contact your employer's benefits office or HR department and ask for the exact date your coverage terminates. Get this in writing if possible. This date is the start of your eight-month Special Enrollment Period for Part B, so you need it to be accurate.

Is there a penalty for delaying Part A?

Yes. If you delay Part A enrollment and do not have a may have access to reason, you pay a 10 percent penalty on your Part A premium for every 12 months you delay. This penalty is permanent. Part A is free for most people, so there is no reason to delay it.