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Prescription Drug Coverage 2027
Medicare Part D Late Enrollment Penalty 2027: Costs and Fixes
Reviewed by Russell Noga, Licensed Medicare Insurance Broker (all 50 states) — Last updated October 30, 2026
The Medicare Part D late enrollment penalty for 2027 is 1% of the $41.33 national base premium for each full month you went without drug coverage, rounded to the nearest $0.10. A 12-month gap adds about $5.00 a month to your premium, and the charge usually lasts as long as you have Part D.
2027 by the Numbers
$41.33
2027 national base beneficiary premium the penalty is built on (CMS)
1%
penalty for each full uncovered month (Medicare.gov)
63 days
longest gap allowed without creditable coverage (Medicare.gov)
60 days
time to ask for a penalty review after the letter (CMS)
Medicare adds a late fee to your drug plan premium if you waited too long to get drug coverage and had nothing comparable in the meantime. The fee is small at first, but it does not go away after a year. It rides along with your premium every month, and it is recalculated each January from a number that tends to rise.
This page does the 2027 math for you, shows how the months are counted, and lists the cases where Medicare drops or never charges the fee. For the wider set of 2027 cost rules, see our Medicare Part D plans 2027 guide, and for what plans charge before any penalty, see Medicare Part D premium 2027.
Key Takeaways
- The 2027 penalty equals 0.4133 dollars for each full month without coverage, rounded to the nearest dime.
- The base premium rose from $38.99 to $41.33, so the same old gap costs a little more in 2027 than it did in 2026.
- Months you had creditable coverage, such as most employer, VA or TRICARE drug plans, do not count.
- People who get Extra Help are not charged the penalty while they have it.
- You have 60 days from the date on your penalty letter to ask Medicare to review it.
How the 2027 Penalty Formula Works
Medicare does the math in three steps. First, it counts the full calendar months you were eligible for Part D but had no Part D plan and no other creditable drug coverage. Second, it multiplies that count by 1% of the national base beneficiary premium, which is $41.33 for 2027. Third, it rounds the result to the nearest $0.10 and adds it to your monthly plan premium.
1
Count the months Only full months without creditable drug coverage count. The count starts after your first chance to enroll ended, not on your 65th birthday.
2
Multiply by $0.4133 That is 1% of the $41.33 base premium for 2027. Twenty months, for example, works out to $8.266.
3
Round to the dime Medicare rounds to the nearest $0.10, so $8.266 becomes $8.30 a month.
4
Add it to your premium The penalty is billed with your drug plan premium, whichever plan you pick.
Note: The penalty is based on the national base premium, not on your plan’s own premium. Picking a low-cost plan lowers your premium, but it does not lower the penalty.
Our 2027 Penalty Table: What Common Gaps Cost
We ran the CMS formula for gaps people often have, such as missing the first sign-up window by a few months or skipping drug coverage for several years. The 2026 column uses the old $38.99 base premium so you can see how the same gap changed.
| Uncovered months | 2027 monthly penalty | 2027 yearly cost | Same gap in 2026 |
|---|---|---|---|
| 6 | $2.50 | $30.00 | $2.30 |
| 12 | $5.00 | $60.00 | $4.70 |
| 24 | $9.90 | $118.80 | $9.40 |
| 36 | $14.90 | $178.80 | $14.00 |
| 60 | $24.80 | $297.60 | $23.40 |
| 120 | $49.60 | $595.20 | $46.80 |
Our math from the CMS 2027 base premium of $41.33 (2026: $38.99), 1% per month, rounded to the nearest $0.10. Yearly cost = monthly penalty x 12.
The takeaway is that the fee is not frozen at the amount you first owed. Because it is tied to a base premium that is reset every year, a person who has owed the penalty since 2026 may see a slightly bigger charge on the January 2027 bill even though no new months were added.
Counting Your Uncovered Months
Most mistakes happen in the counting step. The clock does not start at age 65. It starts the day after your Initial Enrollment Period ends, which is the 7-month window around the month you turn 65. A gap of 63 days in a row or longer without creditable coverage is what makes you owe a penalty at all.
Months that count
✔
Full months after your sign-up window closed with no Part D plan
✔
Months with drug coverage that was not creditable
✔
Months after a gap of 63 days or more began
Months that do not count
✔
Months in your Initial Enrollment Period
✔
Months with creditable employer, union, VA or TRICARE drug coverage
✔
Months you had Extra Help, plus partial months
Here is a worked example with real dates. Someone turned 65 in May 2025, so their sign-up window ran February through August 2025. They had no drug coverage and joined a Part D plan during the fall 2026 Open Enrollment Period, with coverage starting January 1, 2027. The uncovered months are September 2025 through December 2026, which is 16 months. Sixteen times $0.4133 is $6.61, which rounds to $6.60 a month, or $79.20 for 2027.
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What Counts as Creditable Drug Coverage
Creditable coverage is drug coverage that is expected to pay, on average, at least as much as standard Part D. If you had it, those months are not counted against you. Your employer, union or plan is supposed to tell you in writing each year whether your coverage is creditable, usually in a notice sent before October 15.
Coverage that is often creditable (check your notice)
✔
Group health plans from a current employer or union, including many retiree plans
✔
TRICARE and VA drug benefits
✔
Federal Employees Health Benefits coverage
✔
Indian Health Service coverage
Watch out: Some high-deductible employer plans and many discount drug cards are not creditable. A discount card is not insurance at all, so months spent using one still count toward the penalty.
Keep every creditable coverage letter you receive. Our page on the Medicare Part D creditable coverage notice explains what the letter should say. If a plan never told you its coverage was not creditable, that can be grounds to remove the penalty.
When Medicare Drops or Skips the Penalty
The penalty is not always permanent. A few situations erase it or stop it from being charged, and each one is written into CMS rules.
Extra Help
No penalty is billed while you get the Low-Income Subsidy, and months on Extra Help do not count
Turning 65
If you first got Medicare under 65 due to disability, the penalty ends when your age-65 window begins
Plan error
If you were not told your coverage was not creditable, Medicare may remove the penalty
Review win
If a reconsideration finds you had creditable coverage, the penalty is removed
Extra Help is the one most people overlook. If your income and savings are limited, applying for it can stop the penalty right away. Our Extra Help for Medicare Part D 2027 guide covers the limits and how to apply.
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How to Appeal a 2027 Penalty
If your plan says you owe a penalty and you think the months are wrong, you can ask for a reconsideration. An independent reviewer that works for Medicare, not your drug plan, makes the decision.
1
Read the letter Your plan sends a notice that shows the penalty and includes a reconsideration request form.
2
Gather proof Find creditable coverage letters, old insurance cards, pay stubs showing a health plan deduction, or VA or TRICARE records for the months in question.
3
File within 60 days CMS sets the deadline at 60 calendar days from the date on the letter. A late request needs a written reason.
4
Keep paying Pay the premium with the penalty while you wait. If you stop paying, the plan may end your coverage.
5
Watch for the decision If you win, the penalty is removed or lowered and overpaid amounts may be refunded.
Avoiding a New Penalty in 2027
If you are about to lose employer coverage, are turning 65 in 2027, or dropped your drug plan, the goal is to avoid a gap of 63 days or more. These checks keep the count at zero.
Before your coverage ends
✔
Mark the date your current drug coverage stops and plan to have Part D start the next day
✔
Ask your employer or union for a letter confirming the coverage was creditable
✔
If you are new to Medicare, join a drug plan during your 7-month sign-up window even if you take few drugs
✔
If you are in a Medicare Advantage plan without drug coverage, know that you may not be able to add a standalone drug plan to it
A low-premium plan can be cheaper than the penalty over time. CMS says most people without Extra Help can find a basic standalone plan for $10.30 a month or less in 2027, depending on where they live. You can check the 2027 sign-up dates on our Medicare Part D open enrollment 2027 page.
The Bottom Line
The Bottom Line
The 2027 late enrollment penalty is easy to estimate: multiply your uncovered months by $0.4133 and round to the nearest dime. Because it is tied to a base premium that changes every year and usually lasts for life, it is worth checking your months, keeping your creditable coverage letters, and using the 60-day review if the count looks wrong.
We do not offer every plan available in your area. Any information we provide is limited to those plans we do offer in your area. Please contact Medicare.gov or 1-800-MEDICARE (TTY 1-877-486-2048) to get information on all of your options.
Frequently Asked Questions
➤ How much is the Part D late enrollment penalty in 2027?
It is 1% of $41.33 for each full month you went without creditable drug coverage, rounded to the nearest $0.10. A 12-month gap is about $5.00 a month and a 24-month gap is about $9.90 a month.
➤ Why did my penalty go up in 2027 if I did not miss more months?
The penalty is recalculated every year from the national base premium. That premium rose from $38.99 in 2026 to $41.33 in 2027, so the same number of months produces a slightly higher fee.
➤ Does the 63-day rule mean I get two free months?
No. If your gap is shorter than 63 days in a row, no penalty applies. Once a gap reaches 63 days, all of the full uncovered months in that gap are counted, not just the months after day 63.
➤ Is the late enrollment penalty for life?
Usually it lasts as long as you have Medicare drug coverage. It can end if you qualify for Extra Help, if you were under 65 and reach your age-65 sign-up window, or if a review removes it.
➤ Will switching to a cheaper Part D plan lower my penalty?
No. The penalty is based on the national base premium, not your plan’s premium, so it stays the same no matter which plan you choose. A cheaper plan only lowers the premium part of your bill.
➤ Do I owe a penalty if I had a discount drug card?
Yes, those months usually count. A discount card is not drug insurance and is not creditable coverage, so it does not protect you from the penalty.
➤ How long do I have to dispute a 2027 penalty?
CMS gives you 60 calendar days from the date on the penalty letter to send a reconsideration request. If you miss that date, you must explain in writing why it is late.
➤ Do people with Medicaid pay the Part D penalty?
People with full Medicaid automatically get Extra Help, and Medicare does not charge the penalty to people who have Extra Help. Months spent on Extra Help also do not count as uncovered months.
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