Medicare Late Enrollment Penalty

How Medicare's late penalties work, what they cost, and how to sidestep them entirely.

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Quick answer

A Medicare late enrollment penalty is a permanent surcharge added to your premium if you delay Part B or Part D without qualifying coverage. The Part B penalty adds 10% for each 12-month delay and usually lasts as long as you have Medicare, per Medicare.gov.

Miss your Medicare enrollment window and you could pay a penalty for life. Here is how to avoid it.

How does the Part B late enrollment penalty work?

If you do not sign up for Part B when first eligible and do not have qualifying coverage (like active employer insurance), you face a permanent late enrollment penalty. The Part B penalty adds 10% to your premium for every full 12-month period you could have had Part B but did not. So a two-year delay means a 20% lifetime surcharge on top of the $202.90 standard premium. The penalty generally lasts as long as you have Part B, making delays expensive. If you are unsure whether your current coverage counts, call 1-800-MEDIGAP (1-800-633-4427) before you delay.

How does the Part D late enrollment penalty work?

The Part D late penalty applies if you go 63 or more days in a row without creditable drug coverage after your Initial Enrollment Period. It is calculated as 1% of the national base beneficiary premium for each month you went without coverage, then added to your Part D premium for as long as you have Part D. Because the base premium rises over time, so can your penalty. Keeping creditable coverage — through an employer plan or a Part D plan — avoids it entirely. A licensed agent can confirm whether your coverage qualifies.

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Frequently asked questions

What is the Medicare late enrollment penalty?+

It is a permanent surcharge added to your Medicare premium for signing up late without qualifying coverage. The Part B penalty adds 10% per 12-month delay, and the Part D penalty adds 1% of the base premium per month uncovered. Both typically last for life.

How long does the Part B penalty last?+

The Medicare Part B late enrollment penalty generally lasts for as long as you have Part B — meaning it is usually permanent. The 10%-per-year surcharge is added to your monthly premium every month, making a delayed enrollment costly over time.

How can I avoid the Part B penalty?+

Enroll in Part B during your Initial Enrollment Period around age 65, or keep qualifying coverage like active employer insurance and use a Special Enrollment Period when it ends. If you are unsure your coverage counts, call 1-800-MEDIGAP (1-800-633-4427) before delaying.

Is the late enrollment penalty ever waived?+

Penalties may be waived in limited situations, such as if you qualify for Extra Help with drug costs or had creditable coverage you can document. You can also request a reconsideration. Most people avoid penalties entirely by enrolling on time or keeping creditable coverage.

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