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Medicare

Part D Late Enrollment Penalty Calculator

The Part D penalty is 1% of the national base beneficiary premium for every full month you went 63 days or more without creditable drug coverage. In 2026 that base is $38.99, so 14 months late adds $5.50 a month.

Figures checked October 15, 2026 · free, no sign-up

Calculator

Penalty year

Fill in the form to see your estimate. It updates as you type.

Estimate only, using the published figures listed under Sources. It is not a quote, an eligibility decision or advice. Your inputs stay in your browser: nothing is sent or saved, and you never need to share contact details to see a result.

Frequently asked

Coverage expected to pay, on average, at least as much as Medicare’s standard drug coverage. Your employer or plan must tell you each year whether it is creditable.
You can ask your plan for a reconsideration if you believe it is wrong, for example if you had creditable coverage. People who get Extra Help don’t pay it.

Sources & methodology

The calculation runs entirely in your browser with the year-labelled figures from the sources above, and updates as you type. We don’t send, store or log anything you enter. We check these figures against the sources whenever CMS, the IRS or HHS publishes a new year.

Compiled by the McDowell Business Resources Data Desk. Last reviewed: October 15, 2026.

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Medicare TPMO disclaimer: 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 to get information on all of your options.

McDowell Business Resources is not affiliated with or endorsed by the U.S. government, the federal Medicare program, or CMS.

This page is general education, not insurance, tax, legal or investment advice. Figures are dated where shown and can change; your situation may differ, and product availability varies by state and carrier. McDowell Business Resources (MBR Insurance & Financial Services) is an independent agency, not an insurance carrier.

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