2024 Medicare Part D Late-Enrollment Penalty rate will increase 6% - with maximum penalties reaching up to $878 for the year.
If you join a Medicare Part D prescription drug plan after you were first eligible
for Medicare coverage - or you were without Medicare drug coverage for a
period of more than 63 days - and you did not have any other creditable prescription coverage
- then you may* be assessed a Medicare Part D late enrollment premium penalty (LEP). The penalty is an
additional amount you will pay every month for Part D coverage along with your monthly Part D plan's (PDP or MAPD
What is considered creditable drug coverage?
"Creditable drug coverage" is any prescription coverage that is at least as good as basic
Medicare Part D prescription drug coverage - and if you have some form of creditable drug coverage,
you do not need to join a Medicare Part D plan and will not be assessed a late-enrollment penalty
if you someday choose to add Part D prescription drug coverage. Some examples of creditable
drug coverage include VA (Veterans Administration) drug coverage, TRICARE, or employer/union drug
coverage (but check with your employer / union health plan administrator to verify your drug
coverage is "creditable" for purposes of Medicare Part D).
How is the Medicare Part D Late-Enrollment Penalty Calculated?
The LEP is calculated as 1% of the national base Medicare Part D premium for each month
you were without some form of creditable prescription drug coverage. For example, if you did not have drug coverage the first year you were eligible for Medicare, you would pay a penalty of 12% (for 12 months without drug coverage) of the national base premium ($34.70 in 2024) or $4.20 per month in addition to your Medicare drug plan premium.
You can think of this example calculation as either:
1% for each month -- so 12 months would be 12% -- multiplied by the national base premium.
12% x $34.70 = $4.164 or $4.20 (rounded)
The number of months times 1% of the national base premium
12 x $0.3470 ($34.70 x 1%) = $4.164 or $4.20 (rounded)
Both calculations come to the same result.
How long does someone pay a Late-Enrollment Penalty?
penalty is permanent and you will pay
the penalty (adjusted each year for the annual base Medicare Part D
premium) as long as you have Medicare drug coverage.
Your Part D Late-Enrollment Penalty can change every year.
The Centers for Medicare and Medicaid Services (CMS) calculates and
releases the national base Medicare Part D premium each year and in
2024, the national base Medicare Part D premium is $34.70
** -- an increase of 6% (the statutory maximum increase
) as compared the
2023 base premium of $32.74
As reference, the following chart shows each year's national base Medicare Part D premium -- that was used to calculate late-enrollment penalties since 2006.
- 2024: $34.70**
- 2023: $32.74
- 2022: $33.37
- 2021: $33.06
- 2020: $32.74
- 2019: $33.19
- 2018: $35.02
- 2017: $35.63
- 2016: $34.10
- 2015: $33.13
- 2014: $32.42
- 2013: $31.17
- 2012: $31.08
- 2011: $32.34
- 2010: $31.94
- 2009: $30.36
- 2008: $27.93
- 2007: $27.35
- 2006: $32.20
More about calculating your Medicare Part D late-enrollment penalty
As noted, the Medicare Part D late-enrollment premium penalty (LEP) is an
additional monthly cost paid by Medicare Part D beneficiaries who did
not enroll in a Medicare Part D prescription drug plan when they were
first eligible and did not have any other form of "creditable" prescription drug coverage,
or who were without
prescription drug coverage for more than 63 days. Although the number of months used to calculate a late-enrollment penalty may remain constant (for instance, 12 months), as used in the example above, the base Medicare Part D premium changes year-to year - so your monthly penalty can also change every year.
An example of how to estimate a 55-month 2024 Medicare Part D late-enrollment penalty
If you were previously without creditable prescription drug coverage from 2006 through 2010
(55 months without drug coverage) and then joined a Medicare Part D plan in 2011, you would pay
(in addition to your monthly
2024 Medicare plan premium) a monthly penalty of
(55 months without drug coverage * 1% of
$34.70 - rounded to the nearest $0.10) or around an additional
over the year for your drug coverage.
The chart below shows how your 55-month late-enrollment penalty would change
over the years as the Part D "base" premium changes (these are monthly costs that you will pay in addition to your Medicare Part D
or Medicare Advantage plan premium).
On a positive note:
You are not responsible for calculating your own
penalty. Your actual late-enrollment penalty will be calculated by the federal government,
reported to your Medicare Part D or Medicare Advantage plan, and then reported to you. If
you are wrongly assessed a late-enrollment penalty or believe that your penalty was incorrectly
calculated, you have the right to appeal your late-enrollment penalty
The cost of waiting: How large of a late-enrollment penalty could someone pay in
About $878.40 for the year.
is possible that you could have a late-enrollment penalty reaching as high as an additional
per month that must be paid in addition to your
2024 Medicare Part D or Medicare Advantage plan premium.
Here are the assumptions we used for our maximum LEP calculations.
Following these assumptions,
- You were eligible for Medicare back before January 2006 and
- You never joined a Medicare Part D plan until January 2024 and
- You are not eligible for the financial Extra Help program and
- You have been without any other creditable prescription drug coverage since the start of the Medicare Part D program (211 months) (we begin to count months starting with June 2006 through December 2023).
we calculated the maximum penalty as 211 months
without drug coverage
multiplied by 1% of $34.70 = $73.217 rounded to the nearest $0.10, so you would pay an additional $73.20 each month. In other words,
if you were eligible for Medicare Part D coverage back in 2005 and first join a Medicare Part D plan
(or Medicare Advantage plan that includes drug coverage or MAPD) in January,
2024, you will pay an additional $878.40
2024 for your Medicare Part D drug coverage (and as you can imagine, this penalty can change
every year as the Medicare Part D base premium changes).
Below is a chart showing the ever-increasing "cost of waiting" to enroll in a Medicare Part D
plan when you do not have any other creditable drug coverage.
Important: The penalty and the decision to enroll - or not to enroll when you are first eligible for Medicare
Part D plan coverage . . .
We use the "maximum penalty" chart (above) to emphasize the possible costs you may incur if
you do not have any other drug coverage and delay enrollment your Medicare Part D plan.
Aside from the penalty, if you decide to postpone Medicare Part D enrollment and then find
that you have prescription needs, you may need to wait
until the next annual Open Enrollment Period (starting October 15th and continuing through
December 7th) to join a plan with coverage starting the following January 1st - and you will
need to pay all of your prescription costs out-of-pocket until your Part D plan coverage starts.
Even if you currently use no prescription medications
and are in good health, look at the monthly costs on our above chart and consider enrolling
in a Medicare Part D plan or Medicare Advantage plan with the lowest monthly premium -- perhaps a Medicare Advantage plan that offers prescription drug coverage (MAPD) with a $0 premium. And then consider your Medicare Part D plan as typical "insurance" that is available
should you need it.
Question: How does the annual base Medicare Part D
premium compare to the CMS projected average basic Medicare Part D
The Basic Medicare Part D Premium.
In addition to the CMS projected national base
Medicare Part D premium, CMS also calculates a projected average
Medicare Part D premium, based on the proposed Medicare Part D (PDP) and Medicare Advantage plan (MAPD) plan premiums
submitted by plan providers (such as Aetna or Humana) - and weighted by current Medicare drug plan
enrollment. This basic premium is usually released in a CMS Press Release in late-July or
early-August every year.
The 2024 CMS
average basic Part D premium is $34.50
*** a 7.5% increase
as compared to the 2023 from the actual basic premium ($32.09).
In 2023, the CMS projected
average basic Part D premium was $31.50 down 1.8%
from the 2022 from the actual basic premium.
The Base Medicare Part D Premium.
The Part D "base" premium (or national base monthly Medicare Part D premium) mentioned
throughout this article is used to calculate
penalty. The Medicare Part D base premium is calculated by CMS each year
($34.70 in 2024) and released at the same time as the projected "basic premium".
The following chart shows how the CMS projected average "basic" Medicare Part D premium compares to the annual "base" Medicare Part D premium used to calculate the late-enrollment penalty.
Although CMS is projecting that both the national base Medicare Part D premium and the average basic Medicare Part D premium are increasing by 6% and 7.4% respectively, CMS estimates that, "[t]he average total monthly Part D premium is projected to decrease from $56.49 in 2023 to $55.50 in 2024."
You can read more about the 2024 CMS projected
Medicare Part D premiums in our article, "CMS projects a 1.8% decrease in 2024 Medicare prescription drug plan premiums"
found at Q1News.com/1007
Don't agree with your penalty? Appealing your late-enrollment penalty . . .
In certain situations, such as when you have only VA coverage or employer drug coverage or union drug coverage and no Medicare drug plan coverage, you can appeal your late-enrollment penalty
- but don't stop paying your penalty until your penalty appeal is successful.
*Extra Help recipients: No Part D late-enrollment penalties for low-income Medicare beneficiaries.
As noted above, no late-enrollment penalties are assessed on Medicare beneficiaries who qualify for the Medicare Part D financial Extra-Help or Low-Income Subsidy (LIS) program
(and if you qualify for your state's Medicaid program, you automatically qualify for Medicare Part D Extra Help). For additional assistance understanding your Medicare benefits, please call a Medicare representative at 1-800-633-4227 (1-800-Medicare).
**Beginning in 2024, the annual increase in the base beneficiary premium is capped
by the prescription drug law’s premium stabilization provision, not to exceed 6% per year. In 2024, the premium stabilization provision reduced the increase in the base beneficiary premium by 14 percentage points; the base beneficiary premium will increase by 6% in 2024 to $34.70. Without premium stabilization, the 2024 base beneficiary premium would have been $39.35, or $4.65 higher.
***With a premium stabilization-capped 2024 base beneficiary premium
of $34.70, the average basic Part D premium is projected to increase from $32.09 in 2023 to $34.50 in 2024, a 7.5% increase.  Had the 2024 base beneficiary premium not been capped in accordance with the IRA’s premium stabilization provision, the average basic Part D premium would have increased from $32.09 in 2023 to $39.00 in 2024, a 21.5% increase.
https://www.medicare.gov/ drug-coverage-part-d/ costs-for-medicare-drug-coverage/ part-d-late-enrollment-penalty
https://www.cms.gov/ medicarehealth-plansmedicareadvtg specratestatsrate books-and-supporting-data/2024
https://www.cms.gov/newsroom/ fact-sheets/ cms-releases-2024-projected-medicare-part-d-premium-and-bid-information
You can click on the following link if you would like to read more from
CMS on the Medicare Part D late-enrollment penalty: Q1News.com/1002
For more information about the late-enrollment penalty, please take a look at our Late-Enrollment Penalty (LEP) FAQ section
Finally, remember: The Medicare Part B program
also has a late enrollment penalty that is separate from the Part D late-enrollment penalty.