You don't have to enroll in Medicare at 65, but waiting can cost you more later

Medicare enrollment is not automatic, and you are not required to sign up the moment you turn 65. However, if you delay enrollment without a valid reason, you will face late enrollment penalties that increase your premiums permanently. The rules are different depending on whether you are still working, whether you have health coverage through your job, and what type of Medicare you choose.

The key is understanding when you can safely wait and when waiting will cost you. Most people should enroll during their initial enrollment period, which begins three months before the month you turn 65 and ends three months after. If you miss this window and do not have may have access to coverage, penalties attach to your record for life.

Key Takeaways

  • You can delay Medicare enrollment past age 65 without penalty only if you have health coverage through a current employer or your spouse's current employer.
  • If you do not have employer coverage and miss your initial enrollment period, you will pay higher premiums for Medicare Part B and Part D for as long as you have Medicare.
  • Your initial enrollment period runs from three months before your 65th birthday through three months after — a seven-month window.
  • If you are still working at 65 and covered by your employer's health plan, you can wait to enroll in Medicare without penalty, but you must enroll within eight months of leaving that job.

When you can safely delay enrollment

You can postpone Medicare enrollment without penalty if you have creditable coverage — health insurance through a current employer or your spouse's current employer. "Current" means you or your spouse must still be working. If either of you retires or leaves the job, your grace period begins to count down.

Once you or your spouse stops working, you have eight months to enroll in Medicare Part A and Part B without penalty. This eight-month period is separate from your initial enrollment period. If you miss both windows, penalties explore. You should enroll in Part D (prescription drug coverage) during the same eight-month window to avoid a separate late enrollment penalty on drug coverage.

If you have coverage through COBRA (continuation coverage from a former employer), that counts as creditable coverage for the purpose of delaying Medicare. However, COBRA typically lasts only 18 to 36 months, so you will need to enroll in Medicare before COBRA ends or face penalties.

What happens if you miss your enrollment period

Late enrollment penalties are permanent surcharges added to your monthly premiums. For Part B, the 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 delay for two years, you pay 20 percent more every month for the rest of your life, even if you eventually enroll.

For Part D (prescription drug coverage), the penalty is 1 percent of the national average premium for each month you were may be able to access but not enrolled. A one-year delay costs you 12 percent more per month, permanently. These penalties do not go away if you switch plans or move to a different state.

Part A (hospital insurance) has no late enrollment penalty if you have worked long enough to earn Part A coverage through Medicare taxes. However, if you do not have enough work credits, you may have to pay a premium for Part A, and that premium increases if you delay enrollment.

How to enroll during your initial period

Your initial enrollment period is a seven-month window: three months before the month you turn 65, the month you turn 65, and three months after. You can enroll online through Medicare.gov, by phone at 1-800-MEDICARE, by mail, or in person at your local Social Security office.

You will need your Social Security number, proof of citizenship or legal residency, and information about any current health coverage. If you are still working and covered by an employer plan, bring documentation of that coverage so Medicare knows you have creditable coverage.

Enrollment takes about 10 minutes online. Your coverage typically begins the first day of the month in which you enroll, or the first day of the following month if you enroll late in the month. Check the Medicare website for the exact effective date based on when you submit your enrollment.

Special situations that change the rules

If you are a federal employee, railroad retiree, or covered under certain other government plans, your enrollment rules may differ. Some government health plans are considered creditable coverage, and some are not. Contact your plan administrator or call Medicare to confirm whether you can delay enrollment.

If you are not yet 65 but have been on Social Security disability benefits for 24 months, you are automatically enrolled in Medicare Part A and Part B. You do not need to do anything, but you should review your coverage to decide whether to enroll in Part D for prescription drugs.

If you have end-stage renal disease (ESRD) or ALS (amyotrophic lateral sclerosis), you may be able to enroll in Medicare before age 65. Contact Social Security or Medicare directly to learn about your options.

Deciding between Original Medicare and Medicare Advantage

When you enroll, you choose between Original Medicare (Part A and Part B) and Medicare Advantage (Part C). This choice affects your enrollment important date and your penalty rules. Both are available during your initial enrollment period, but the timing for switching between them later is limited.

If you choose Original Medicare, you can enroll in Part D (prescription drug coverage) anytime during your initial enrollment period. If you choose Medicare Advantage, the plan usually includes prescription drug coverage, so you do not need to enroll in Part D separately.

You can switch from Original Medicare to Medicare Advantage or vice versa during the annual enrollment period (October 15 to December 7 each year), but missing your initial enrollment period still results in penalties if you do not have creditable coverage.

What to do if you missed your enrollment period

If you missed your initial enrollment period and do not have creditable coverage, you can still enroll, but penalties will explore. You can enroll during the general enrollment period (January 1 to March 31 each year), and your coverage will begin July 1 of that year.

Contact Medicare at 1-800-MEDICARE or visit Medicare.gov to enroll. Explain your situation — if you have a valid reason for missing your important date (such as a serious illness or a mistake by Social Security), you may be able to request a waiver of the late enrollment penalty. Requests for penalty waivers are reviewed case by case, and approval is not may provide.

Do not wait longer than necessary. The longer you delay, the higher your cumulative penalty becomes. Enrolling during the next available general enrollment period stops the penalty from growing further.

Frequently Asked Questions

Can I delay Medicare if I am still working at 65?

Yes, if you have health coverage through your current job or your spouse's current job. You can delay Part A and Part B enrollment without penalty as long as you remain employed and covered. Once you or your spouse stops working, you have eight months to enroll without penalty.

What if I turn 65 but do not plan to retire for several more years?

If you have employer coverage, you can wait. However, you must enroll in Medicare within eight months of retiring or losing that coverage. Set a reminder for yourself so you do not miss the important date. If you are unsure whether your coverage counts as creditable, ask your employer's benefits department or call Medicare.

Do I have to enroll in Part D if I do not take any medications?

You are not required to enroll in Part D if you do not take prescription drugs. However, if you enroll later when you do need medications, you will pay a late enrollment penalty. If there is any chance you might need prescriptions in the future, enrolling during your initial period protects you from penalties.

What if Social Security made a mistake and I missed my enrollment period?

Contact Medicare when ready at 1-800-MEDICARE and explain what happened. You can request a waiver of the late enrollment penalty if Social Security's error caused you to miss your important date. Waivers are not automatic, but they are sometimes granted. Have documentation of the error ready when you call.

Can I enroll in Medicare before I turn 65?

No, unless you have been on Social Security disability for 24 months, have end-stage renal disease, or have ALS. For most people, enrollment begins three months before the month you turn 65. If you think you may may have access to for early enrollment, contact Social Security or Medicare to confirm.