Medicare

Medicare Late Enrollment Penalty

The Medicare late enrollment penalty increases Part B premiums by 10% per year of delay and Part D premiums by 1% per month without creditable coverage — and these surcharges last for life.

Last reviewed: May 2026 · Editorial methodology

Definition

The Medicare late enrollment penalty (LEP) is a permanent surcharge applied to monthly premiums for Medicare Part B and/or Part D when a beneficiary delays enrollment beyond their Initial Enrollment Period without maintaining qualifying coverage. For Part B, the penalty is 10% of the current standard Part B premium ($202.90 in 2026) for each full 12-month period during which the beneficiary was eligible for Part B but not enrolled and not covered by employer group health insurance through active employment. This 10% increment per year is added permanently — a beneficiary who delayed two years pays 20% extra for life. For Part D, the penalty is 1% of the national base beneficiary premium ($36.78 in 2026) multiplied by the number of full months the person went without Part D or other creditable prescription drug coverage. The Part D penalty also lasts for the beneficiary's lifetime, though it is recalculated annually as the base premium changes. Creditable coverage from an employer, VA, TRICARE, or other qualified source prevents penalties from accruing.

Where this term matters

Medicare →/life-events →

Tip

Glossary definitions are educational. Always check your own policy language — insurers can define common terms differently from one another. When in doubt, request a written explanation from your agent.

Related terms

Medicare Part BMedicare Part B charges a monthly premium — $202.90 in 2026 for most beneficiaries — and covers the outpatient medical services that Part A does not.Medicare Part DMedicare Part D covers prescription drugs and features a $2,100 out-of-pocket cap in 2026, ending the coverage gap that previously left beneficiaries with full costs.Initial Enrollment Period (IEP)Your IEP spans three months before, the month of, and three months after your 65th birthday — missing it can result in permanent late enrollment penalties.Medicare General Enrollment PeriodThe Medicare General Enrollment Period is a fallback enrollment window for those who missed their IEP, with coverage starting July 1 and late enrollment penalties applying.Medicare Special Enrollment PeriodA Medicare SEP lets you enroll in Medicare without late penalties when you lose qualifying employer coverage or experience other defined life events.

Related guides

Source: Cover Forge USA editorial team|Last verified: May 2026|Methodology
Definitions are educational and may be simplified. Always refer to your policy contract and consult a licensed agent for terms that affect coverage decisions.
CF

Cover Forge USA Editorial Team

Editorial Lead

This article was researched and written by the Cover Forge USA editorial team against federal sources (NAIC, CMS, FEMA, DOL, SSA, state DOIs) and standard policy forms. Bylines organize content by topic — they do not assert individual licensure. See our editorial-policy for details.

Reviewed June 2026

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