Medicare Late Enrolment Penalties (LEP)
It is essential to enroll in Medicare during
your Initial Enrollment Period (IEP) to avoid any potential
penalties. Failing to do so can result in a late enrollment penalty,
which can increase your premium costs significantly.
The late enrollment penalty is an additional
cost added to your Medicare premium (surcharge). This penalty is
intended to encourage timely enrollment and ensure that individuals
maintain adequate prescription drug coverage. This was started May
15, 2006.
Duration of the Penalty
The late enrollment penalties are not one-time
fees; rather, they are a monthly charge that lasts as long as you
have Part B or Part D coverage. Therefore, it can add up over time
and significantly increase your overall healthcare costs.
Initial Enrollment Period (IEP)
Enroll during this period to avoid late
enrollment penalties.
Understanding the Late Enrollment Penalty
If you do not sign up for Medicare Part B (or
Part D, prescription drug coverage) when you are first eligible and
you do not qualify for a Special Enrollment Period, you may be
subject to a late enrollment penalty. This penalty is designed to
encourage timely enrollment and helps ensure that individuals do not
wait until they are sick to join Medicare.
Medicare Part B Late Enrollment Penalty
The Medicare Part B late enrollment penalty is
calculated based on how long you went without Part B coverage. The
penalty is an additional 10% of the standard Part B premium for each
full 12-month period that you were eligible for Part B but did not
sign up. This penalty is added to your monthly premium and continues
for as long as you have Part B.
For example, if you were eligible for Part B
for two years but did not enroll, your monthly premium would include
a 20% penalty (10% for each full year). If the standard Part B
premium is $148.50, your premium with the penalty would be $178.20.
Medicare Part D Late Enrollment Penalty
The late enrollment penalty for Medicare Part D
is calculated differently. It is based on the number of months you
went without "creditable" prescription drug coverage after your
Initial Enrollment Period ended. Creditable coverage means that your
previous prescription drug coverage was expected to pay, on average,
at least as much as Medicare’s standard prescription drug plan.
The penalty is calculated by multiplying 1% of
the "national base beneficiary premium" ($33.06 in 2021) by the
number of full months you were without Part D or creditable
coverage. This amount is then added to your monthly Part D premium
and will generally stay with you for as long as you have Part D
coverage.
For instance, if you were without coverage for
15 months, the penalty would be 15% of $33.06, which is
approximately $4.96. This amount would be added to your monthly Part
D premium.
Special Enrollment Periods (SEPs)
There are certain situations in which you may
qualify for a Special Enrollment Period, allowing you to sign up for
Medicare without facing a penalty. These include:
Employer Coverage
If you or your spouse are still working and you
have health insurance through an employer or union, you may qualify
for a Special Enrollment Period. You can sign up for Medicare Part A
and/or Part B:
Anytime you are still covered by the employer
or union health plan. During the 8-month period that begins the
month after your employment ends or your coverage ends, whichever
happens first.
Medigap and Medicare Advantage Plans
If you are enrolled in a Medicare Advantage
Plan or have a Medicare Supplement Insurance (Medigap) policy, there
are specific scenarios in which you may qualify for a Special
Enrollment Period. These scenarios may include moving out of your
plan’s service area, your plan leaving the Medicare program, or your
plan stopping service in your area.
How to Avoid the Late Enrollment Penalties
To avoid the late enrollment penalties, it is
crucial to understand your enrollment periods and make timely
decisions regarding your Medicare coverage. Here are some tips to
help you avoid the penalty:
Know your Initial Enrollment Period:
Mark your calendar and be aware of the seven-month window
surrounding your 65th birthday and enroll when first eligible.
Consider your current coverage: If you
have health insurance through an employer or union, understand how
it interacts with Medicare and whether it qualifies as creditable
coverage.
Be Aware of Special Enrollment Periods:
Certain life events, such as moving out of your plan's service area
or losing other credible coverage, can qualify you for a Special
Enrollment Period. During this time, you can enroll in Part B and
Part D plans without facing a penalty.
Review your options: Take the time to
explore your Medicare options, including Part A, Part B, Part C, and
Part D, to determine which plans best meet your needs.
Stay informed: Keep up with any changes
to Medicare rules and regulations, as these can impact your
enrollment decisions and potential penalties.

Page Last Updated: 20 March 2025