You don't have to sign up for Medicare the moment you turn 65, but waiting costs you money unless specific conditions explore

Medicare enrollment at 65 is automatic only if you are already receiving Social Security benefits. If you are not yet taking Social Security, you have a choice: enroll in Medicare when you turn 65, or delay. The catch is that most people who delay without a valid reason pay a permanent penalty on their premiums for as long as they have Medicare.

The rules are different depending on whether you have health coverage through an employer. If you are still working and covered by your employer's plan, you may be able to delay Medicare without penalty. If you are retired or uninsured, delaying usually means paying more later.

Key Takeaways

  • If you are not yet taking Social Security, you must actively enroll in Medicare during your initial enrollment period (the three months before, the month of, and three months after you turn 65) to avoid a permanent penalty.
  • You can delay Medicare past 65 without penalty only if you have health coverage through a current employer or your spouse's current employer.
  • Late enrollment penalties are permanent and increase the longer you wait, adding to your Part B and Part D premiums for life.
  • If you are covered by an employer plan, you must enroll in Medicare within eight months of losing that coverage to avoid penalties.
  • You should contact Social Security or Medicare directly to confirm your enrollment status, because not being enrolled when you think you are can trigger unexpected penalties.

When you can safely delay Medicare past 65

You can delay Medicare without penalty if you have creditable coverage — health insurance through a current employer or your spouse's current employer. This applies whether you work full-time or part-time, as long as the employer has 20 or more employees. If your employer is smaller, you cannot use this exception.

The key word is current. Once you leave that job or lose the coverage, you have eight months to enroll in Medicare. If you miss that window, you will owe a late enrollment penalty for Part B (the medical insurance portion) and Part D (prescription drug coverage) for as long as you have Medicare. The penalty is 10 percent of the Part B premium for each 12 months you were not enrolled, and a similar calculation for Part D.

If you are self-employed or have coverage through the Affordable Care Act marketplace, those do not count as creditable coverage. You must enroll in Medicare during your initial enrollment period or pay the penalty.

What happens if you miss your initial enrollment period

Your initial enrollment period is seven months long: three months before the month you turn 65, the month you turn 65, and three months after. If you do not enroll during this window and you do not have creditable employer coverage, you will owe a late enrollment penalty.

The Part B penalty is 10 percent of the standard premium for each full 12-month period you were may be able to access but not enrolled. If you were may be able to access for two years and did not enroll, your penalty is 20 percent of the premium, added to your monthly bill permanently. Part D penalties work the same way and are calculated based on the national average premium at the time you enroll.

You can enroll in Medicare anytime after your initial period ends, but the penalty does not go away. It stays on your premiums for life, even if you switch plans or move to a different state.

How to know if you are already enrolled

If you are receiving Social Security benefits, you are automatically enrolled in Medicare Part A (hospital insurance) and Part B (medical insurance) at 65. You do not have to do anything. However, you still need to enroll in Part D (prescription drug coverage) during your initial enrollment period if you want it, or you will owe a late enrollment penalty on drug coverage.

If you are not receiving Social Security, you are not automatically enrolled. You must contact Medicare or Social Security to sign up. You can enroll online at Medicare.gov, by phone at 1-800-MEDICARE, or in person at your local Social Security office.

Do not assume you are enrolled just because you turned 65. Contact Medicare directly to confirm your enrollment status, especially if you are not taking Social Security yet. Many people discover they were never enrolled only when they try to use their card or receive a bill.

The difference between Part A and Part B enrollment

Part A (hospital insurance) and Part B (medical insurance) have different penalty rules. Most people do not owe a Part A penalty because they paid Medicare taxes while working, which makes them may be able to access for free Part A at 65. However, if you delay Part B, you owe a penalty.

There is one exception: if you have creditable employer coverage, you can delay both Part A and Part B without penalty. Once you lose that coverage, you have eight months to enroll in both without owing a penalty. If you wait longer, the Part B penalty applies.

Part D (prescription drug coverage) is separate. Even if you do not take any medications now, you should enroll in a Part D plan during your initial enrollment period. If you go without Part D coverage and enroll later, you owe a penalty for each month you were not enrolled, calculated at 1 percent of the national average premium per month.

What to do if you are still working at 65

If you are working and your employer offers health insurance, you can delay Medicare without penalty. However, you must tell your employer's benefits office that you are turning 65 and ask whether your coverage is considered creditable for Medicare purposes. Not all employer plans are.

When you leave your job or lose your employer coverage, you have eight months to enroll in Medicare. Mark this important date on your calendar. If you miss it, you will owe a permanent penalty. Some employers send a notice when you turn 65 or when you leave the company, but do not count on it — contact Medicare yourself to be sure.

If you are self-employed or own a business, you cannot use the employer coverage exception. You must enroll in Medicare during your initial enrollment period or pay a penalty, even if you have health insurance through another source.

Questions to ask your doctor and Medicare

Before you decide to delay Medicare, ask your current doctor whether they accept Medicare. Some doctors do not, and if yours is one of them, delaying Medicare might mean losing your doctor when you do enroll. Also ask whether your employer's plan covers the same services as Medicare, or whether there are gaps you should know about.

Contact Medicare at 1-800-MEDICARE or visit Medicare.gov to confirm your enrollment status and understand your options. Ask specifically whether your employer coverage is creditable for Medicare purposes, and if you are delaying, ask what date you must enroll by to avoid a penalty. Write down the date and set a reminder.

If you are receiving Social Security, contact Social Security to confirm that your Medicare enrollment happened automatically. If you are not receiving Social Security, contact Medicare to enroll yourself during your initial enrollment period.

Frequently Asked Questions

Can I delay Medicare if I have a health savings account or marketplace insurance?

No. A health savings account is a savings tool, not creditable coverage. Marketplace insurance through the Affordable Care Act does not count as creditable employer coverage either. If you have either of these, you must enroll in Medicare during your initial enrollment period or pay a penalty.

What if I turn 65 while still working but my employer does not offer health insurance?

You must enroll in Medicare during your initial enrollment period. You cannot delay just because you are working. If you do not enroll, you will owe a late enrollment penalty on Part B and Part D.

Do I have to take Social Security at 65 if I want to delay Medicare?

No. You can delay Social Security and still enroll in Medicare, or delay both. However, if you do not enroll in Medicare during your initial enrollment period and you do not have creditable employer coverage, you will owe a penalty. Delaying Social Security does not protect you from the Medicare penalty.

Can the late enrollment penalty be removed if I did not know about it?

Not usually. Medicare does not waive the penalty for people who did not know about the rule. The penalty is permanent unless you had creditable coverage and did not know you were supposed to enroll within eight months of losing it. Contact Medicare to ask whether your situation qualifies for an exception, but do not count on it.

What happens to my Medicare if I go back to work after I enroll?

Your Medicare stays active. You can work and have Medicare at the same time. If you also have employer coverage, Medicare becomes your secondary insurance, meaning your employer plan pays first for covered services. You do not need to disenroll from Medicare.