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Part D Penalty Estimator
Going without creditable drug coverage after you're first eligible adds a permanent Part D penalty — roughly 1% of the national base beneficiary premium for each month you went without. Like the Part B penalty, it lasts for as long as you have Part D coverage. We'll estimate yours and help you stay penalty-free.
How to use this tool
Count the months since you were first eligible for Part D that you went 63 or more days without creditable drug coverage — coverage at least as good as a standard Part D plan, such as some employer or VA drug benefits. Enter that number of months and we estimate the surcharge. It won't enroll you in anything; it simply shows what delaying creditable drug coverage could cost down the road.
What the numbers mean
The penalty is about 1% of the national base beneficiary premium for every month you went without creditable coverage, then added to your Part D premium. Because it's tied to the national base premium, your penalty can shift slightly year to year as that base changes — and it sticks with you for life. A long gap can mean a meaningful permanent add-on, which is why timing matters even if you take few drugs today.
How to avoid it
Keep creditable drug coverage and enroll on time. Even if you take no medications, signing up for a low-cost Part D plan during your Initial Enrollment Period starts the clock at zero. If you have employer or VA drug coverage, hold on to the notice that says it's creditable — you'll want it later. Not sure whether your current coverage counts? Send us the details and we'll confirm before any gap opens up.
A quick note on these estimates
These tools give general estimates from publicly available CMS Plan Year 2026 data — they are not a quote, an enrollment, or a guarantee of coverage, cost, or eligibility. Plans, premiums, and rules change. Confirm current details with the plan and on Medicare.gov or 1-800-MEDICARE before you enroll, or let a licensed Big Sioux Benefits advisor verify your exact numbers for free.
Part D Late-Penalty Estimator
Going without drug coverage adds a permanent penalty to every future premium. See yours.
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Questions, answered
I don't take any drugs — do I still need Part D?
Often yes, to avoid a lifelong penalty later. Enrolling in a low-cost Part D plan when you're first eligible keeps your penalty at zero, and almost everyone needs a prescription eventually. The penalty you'd pay for signing up years later can easily outweigh the small premium of staying covered now. We can find you an inexpensive plan to keep you protected.
How is the Part D late penalty calculated?
It's roughly 1% of the national base beneficiary premium for each month you went without creditable drug coverage after eligibility, rounded and added to your Part D premium. Because it's based on the national base premium — which can change each year — your exact dollar amount can move slightly over time, but the penalty itself stays with you for life.
What counts as creditable drug coverage?
Creditable coverage is drug coverage expected to pay, on average, at least as much as a standard Medicare Part D plan. That can include some employer, union, or VA drug benefits. Your plan should send a notice each year stating whether it's creditable — keep it. If you're unsure, we'll help you confirm so you don't accidentally trigger a penalty.
Does the Part D penalty ever go away?
Generally no. Once it applies, it's added to your Part D premium for as long as you have drug coverage. A narrow exception exists for people who qualify for Extra Help (the low-income subsidy), which can eliminate the penalty. Otherwise, the only real fix is avoiding it up front by keeping creditable coverage and enrolling on time.
How much does the Part D penalty cost per month?
It's about 1% of the national base beneficiary premium for each month you went without creditable drug coverage, rounded and added to your Part D premium. So a 24-month gap is roughly 24% of that base figure tacked on monthly. Because it's tied to the national base premium, which can change yearly, the exact dollar amount can drift up or down a little over time. We can estimate yours from your gap.
How long does the Part D penalty last?
For as long as you stay enrolled in Medicare drug coverage — it's a lifelong surcharge, not a one-time charge. Each month you owe it gets added to your Part D premium. The most common way out is qualifying for Extra Help, the low-income subsidy, which can remove it. Otherwise the surcharge stays with you, which is why enrolling on time at the start matters so much.
Does VA drug coverage count as creditable for Part D?
Yes, VA prescription benefits are generally considered creditable coverage, which means keeping them protects you from the Part D late penalty even if you don't enroll in a Part D plan right away. Some employer and union drug plans qualify too. Hold on to any notice that confirms your coverage is creditable, since you may need it later. If you're unsure your coverage counts, send us the details and we'll confirm.
What is the 63-day rule for Part D?
The penalty generally applies once you go 63 or more days in a row without creditable drug coverage after your Initial Enrollment Period ends. Shorter gaps usually don't trigger it. That's why it matters to line up new coverage before an old plan ends, so you don't accidentally cross that 63-day line. If you're switching coverage and worried about a gap, we can help you time it so the clock never starts.
Can Extra Help get rid of the Part D penalty?
Yes. People who qualify for Extra Help — the federal low-income subsidy that lowers drug costs — generally don't pay the Part D late-enrollment penalty. If your income and resources are limited, you may be eligible and not realize it. It's worth checking, because it can erase the penalty and reduce your premiums and copays. We can help you see whether you might qualify and point you to how to apply.
Will Medicare tell me if I owe a Part D penalty?
Yes. If your drug plan determines you owe the penalty, you'll get a notice explaining it and how the amount was figured, with a chance to provide information about any creditable coverage you had. It's worth responding promptly with proof of past coverage, since that can reduce or remove the charge. If you receive one of these notices and aren't sure how to respond, we're happy to walk you through it.
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