The Medicare Part D late enrollment penalty is an extra amount added to your drug plan premium if you go too long without Part D or other creditable prescription drug coverage.

The key number is 63 days. If you go 63 days or more in a row after your Medicare drug coverage window starts, and you do not have creditable drug coverage, Medicare may add a Part D penalty when you enroll later.

In 2026, Medicare calculates the penalty using 1% of the national base beneficiary premium for each full uncovered month. The 2026 base amount is $38.99, and Medicare rounds the result to the nearest dime.

That means the Part D penalty is usually not a one-time fee. It can follow you as long as you have Medicare drug coverage.

How the Part D Late Enrollment Penalty Works

Medicare looks at how many full months you went without either:

  1. a Medicare Part D plan
  2. a Medicare Advantage plan that includes drug coverage
  3. other creditable prescription drug coverage

Then Medicare multiplies those uncovered months by 1% of the national base beneficiary premium.

For 2026, the math uses $38.99.

Here is the practical version:

  1. 10 uncovered months: about $3.90 per month
  2. 20 uncovered months: about $7.80 per month
  3. 30 uncovered months: about $11.70 per month
  4. 48 uncovered months: about $18.70 per month

Those numbers can change each year because the national base beneficiary premium can change. Your penalty is recalculated when that base amount changes.

When Does the 63-Day Clock Matter?

The Part D penalty usually becomes a risk after your first valid Medicare drug coverage window starts.

For many people, that is the 7-month Initial Enrollment Period around the 65th birthday. If you do not sign up for Part D during that window and you do not have other creditable drug coverage, the clock can start.

This can also matter after employer or retiree drug coverage ends. If that coverage was creditable, you generally want to avoid a long gap before the next drug plan starts.

If you are still working at 65, do not guess. Ask the employer or benefits administrator whether the prescription drug coverage is creditable for Medicare Part D. The medical coverage question and the drug coverage question are not always the same.

For the broader Medicare timing issue, read What Is Creditable Coverage for Medicare?.

What Counts as Creditable Drug Coverage?

For Part D, creditable coverage means the drug coverage is expected to pay, on average, at least as much as standard Medicare prescription drug coverage.

Common examples may include:

  1. drug coverage from an employer or union plan
  2. retiree drug coverage
  3. VA drug benefits
  4. TRICARE
  5. certain other prescription drug benefits Medicare recognizes

The word “may” matters. You want the actual creditable coverage notice, not a casual answer from someone who is not looking at the plan.

Most employer and retiree plans send a creditable coverage notice each year. Keep that notice. If Medicare later says you owe a penalty, that paperwork can matter.

Part D and Part B Penalties Are Different

This is where people get crossed up.

The Part B late enrollment penalty and the Part D late enrollment penalty are not calculated the same way.

For Part B, the penalty is generally based on full 12-month periods you delayed Part B without qualifying coverage.

For Part D, the penalty is based on the number of full months you went without Medicare drug coverage or other creditable drug coverage after your drug coverage window started.

That means a shorter gap can matter for Part D than people expect. The Part D rule is not “wait a year and then worry about it.” The 63-day gap is the warning line.

If you need the medical-side penalty first, read What Is the Medicare Part B Late Enrollment Penalty?.

What If You Do Not Take Any Prescriptions?

This is the most common reason people skip Part D.

They turn 65, take no daily medications, and think a drug plan is unnecessary. I understand the logic. The problem is that Medicare does not waive the late enrollment penalty just because you were healthy.

If you do not have other creditable drug coverage, a low-premium Part D plan may be worth considering even if you rarely fill prescriptions. The reason is not because you expect to use it heavily today. It is because you are protecting future access and avoiding a penalty if your health changes later.

That does not mean you should buy the most expensive plan. It means you should compare plans based on your current situation and understand what risk you are taking if you skip drug coverage entirely.

For the broader coverage question, read What Does Medicare Part D Cover in 2026?.

What If You Have VA Drug Benefits?

VA drug benefits are commonly treated as creditable coverage for Medicare Part D.

That can allow many veterans to delay Part D without a late enrollment penalty. But the decision is still worth thinking through because VA and Medicare drug coverage do not work as one combined pharmacy plan.

Some veterans keep VA drug coverage only. Others add Part D because they want access to non-VA pharmacies, local retail options, or prescriptions from non-VA doctors.

If you are a veteran, the penalty question is only one part of the decision. The practical question is where you want to fill prescriptions and how you want non-VA doctors, pharmacies, and Medicare plans to fit together.

These two articles may help:

  1. How VA Benefits Work With Medicare: A Missouri Veterans Guide
  2. Medicare Advantage for Veterans: How It Works With VA Benefits

Can Extra Help Remove the Part D Penalty?

If you qualify for Medicare’s Extra Help program, Medicare says you do not pay the Part D late enrollment penalty.

That is a big deal for people with limited income and resources. Extra Help can lower drug costs, reduce plan costs, and remove the penalty issue while you qualify.

If cost is the reason you delayed drug coverage, check Extra Help before assuming you are stuck.

Start here: Medicare Part D Extra Help: Who Qualifies and How It Works.

How to Avoid the Part D Penalty

The safest approach is simple:

  1. enroll in Part D when you are first eligible, unless you have creditable drug coverage
  2. keep proof if you are delaying because of employer, retiree, VA, or other drug coverage
  3. do not let more than 63 days pass between creditable drug coverage and Medicare drug coverage
  4. review your drug plan every year because formularies, pharmacies, and premiums can change

Part D is one of the areas where a cheap-looking decision can get expensive later. A plan with a low premium may still be a poor fit if your pharmacy is not preferred or your medication sits on a bad tier. Skipping drug coverage can be a problem too if you do not have creditable coverage elsewhere.

For the plan shopping process, read How to Compare Medicare Part D Plans Without Guessing.

What I Would Check Before Skipping Part D

Before someone in Missouri or the Kansas City area skips Part D, I would want clear answers to these questions:

  1. Do you have a written creditable drug coverage notice?
  2. If coverage comes from an employer, is it active employee coverage, retiree coverage, or COBRA?
  3. If you have VA or TRICARE, where do you actually want to fill prescriptions?
  4. Are you comfortable with the risk of needing a medication before the next enrollment window?
  5. Would a low-premium Part D plan protect you for a reasonable cost?
  6. Could Extra Help or a Medicare Savings Program change the math?

The answer is not always the same for everyone. A veteran using the VA pharmacy has a different decision than someone with no drug coverage at all. A retiree with a strong employer drug plan has a different decision than someone who simply takes no prescriptions today.

That is why I would not treat “I do not take medicine” as the whole strategy.

Official Sources

Medicare explains the Part D penalty on its page for late enrollment penalties and its separate page for the Part D late enrollment penalty. Medicare also explains how to avoid paying a Part D penalty.

Frequently Asked Questions

How much is the Medicare Part D late enrollment penalty in 2026?

In 2026, Medicare uses 1% of the national base beneficiary premium, which is $38.99, for each full month you went without Part D or other creditable drug coverage. Medicare rounds the result to the nearest dime.

When does the Part D penalty start?

The penalty can apply if you go 63 days or more in a row without Medicare drug coverage or other creditable prescription drug coverage after your Medicare drug coverage window starts.

Do you pay the Part D penalty forever?

In many cases, you pay the Part D penalty for as long as you have Medicare drug coverage. The amount can change each year because the national base beneficiary premium can change.

Do I need Part D if I take no prescriptions?

If you have no other creditable drug coverage, skipping Part D can create a late enrollment penalty later. Some people choose a low-premium plan mainly to protect against future medication needs and penalty risk.

Does VA drug coverage count as creditable coverage?

VA drug benefits are generally treated as creditable coverage for Medicare Part D. Veterans should still compare how VA pharmacy access, local pharmacy access, Medicare Advantage, and Part D would work in real life.