Glossary
Late Enrollment Penalty (Part B and Part D)
A permanent monthly surcharge added to your Part B (10% per 12 months delayed) or Part D (1% per month delayed) premium for as long as you have Medicare.
Also known as: LEP, Part B penalty, Part D penalty, Medicare LEP
Quick answer
If you don't sign up for Part B when you're first eligible and don't qualify for a Special Enrollment Period, Medicare adds 10% to your Part B premium for every full 12-month period you went without it — permanently. The Part D penalty is similar: 1% of the national base beneficiary premium for every month you went without creditable drug coverage.
Why it matters
The penalty compounds across years and never goes away. A retiree who delayed Part B by 4 years owes a 40% surcharge on the Part B premium for life. Worse — they had no TFL during those 4 years, since TFL requires Part B.
Why this matters at age 65
Most retired-military late penalties trace to one mistake: skipping Part B at 65 because of TRICARE or VA. Neither qualifies as creditable employer coverage. The result is permanent penalty + loss of TFL. The penalty is calculated from the end of your IEP, NOT from when you stop using TRICARE.
When you'll encounter it
Assessed automatically by Social Security when you finally enroll during a General Enrollment Period (or late SEP). It appears on your first Medicare premium notice and continues forever.
Impact on Medicare
Permanently increases your monthly Part B (and/or Part D) premium. The penalty is added to whatever the standard premium is each year, so it grows with the premium.
Impact on TRICARE For Life
If you delayed Part B, TFL was terminated during the entire delay period. Once you enroll, TFL resumes — but the penalty stays on your Part B premium forever, and Medicare does not reimburse any civilian medical bills you incurred during the gap.
Impact on Medicare Advantage
Joining an MA plan does not remove or reduce the penalty. The penalty rides along with the Part B premium and applies regardless of how you receive your Medicare benefits.
VA Healthcare considerations
VA Healthcare is not creditable coverage for Part B penalty purposes — using VA exclusively past 65 will not protect you. VA care IS creditable coverage for Part D, so VA enrollees do not owe a Part D penalty.
Common misconceptions
- "The penalty falls off after a few years." — It is permanent — calculated from the end of your IEP and assessed for life.
- "TRICARE protects me from the Part B penalty." — It does not. TRICARE is not creditable employer coverage for Medicare.
- "I can appeal away the penalty." — Only in narrow cases — bad advice from a federal employee, natural disasters, or specific equitable-relief situations. 'Nobody told me' is not a valid appeal.
Common mistakes to avoid
- Believing TRICARE counts as creditable coverage (it does not for Part B SEP).
- Counting partial years toward the penalty calculation — Medicare uses FULL 12-month periods, so 13 months late = 10%, 25 months = 20%.
- Not enrolling in Part D when needed and assuming TRICARE Pharmacy alone protects against a Part D penalty (it does — TRICARE pharmacy is creditable — but ONLY if you keep the creditable coverage letter on file).
Real-world scenario: A retired Army lieutenant colonel skips Part B at 65 'because I'll just use the VA.' Four years later he is in a car accident outside a VA service area and needs civilian surgery.
Civilian bills are not covered (no TFL, no Part B). He enrolls during GEP. Part B premium = standard $202.90 + 40% penalty = about $284/month FOR LIFE. Lifetime penalty cost over a 25-year retirement: roughly $24,000 — not counting the surgical bills.
What should I do?
- 1If you've already received a penalty notice, request the calculation in writing from SSA and verify the count of full 12-month periods.
- 2If you received clearly incorrect written advice from a federal employee, file SSA equitable-relief paperwork — it's narrow but real.
- 3Keep every TRICARE 'Creditable Coverage Notice' (mailed annually by Express Scripts) in case Part D penalty calculations come up later.
- 4If you haven't yet missed enrollment, treat your IEP as a hard deadline — even one month of unnecessary delay is the start of a permanent surcharge.
Questions people commonly ask
- Is the Part B penalty ever waived?
- Does TRICARE pharmacy protect against Part D penalty?
- How is the penalty calculated?
- Can I appeal the penalty if I got bad advice?
Continue learning
— suggested by the knowledge graph- What is Medicare? A complete overview for retired militaryA plain-English, handbook-grounded overview of the federal health insurance program for people 65 and older, written specifically for retired service members and their families.
- Understanding Original Medicare (Parts A & B) for veteransExactly what Part A and Part B cover, what they cost in 2026, and why both are required to keep TRICARE For Life.
- Enrolling in Medicare: timing, methods, and the military-specific rulesWhen and how to sign up for Medicare Parts A and B — and the timing that protects your TRICARE For Life activation.
- IRMAA (Income-Related Monthly Adjustment Amount)An income-based surcharge added to your Medicare Part B and Part D premiums when your modified adjusted gross income exceeds CMS thresholds.
- Premium-Free Part AMost people pay no monthly premium for Medicare Part A because they (or a spouse) paid Medicare taxes for at least 40 quarters (10 years) of work.
- Social Security (and Medicare Enrollment)The Social Security Administration handles Medicare enrollment, premium collection, and IRMAA determinations — even though Medicare itself is run by CMS.
- Benefit Period (Part A)The Part A timeframe used to measure hospital deductibles and coinsurance — it resets after 60 days out of the hospital.
- Creditable Drug CoveragePrescription drug coverage that CMS certifies is at least as good as standard Medicare Part D — including TRICARE Pharmacy and VA Pharmacy.
- Disability Medicare Eligibility (Under 65)Medicare eligibility before age 65 — automatic after 24 months of SSDI, immediately for ALS, and based on dialysis/transplant for ESRD.
- How much does Medicare Part B cost?Most people pay the standard Part B premium (roughly $202.90/month in 2026). Higher-income retirees pay IRMAA on top. Lower-income retirees may qualify for help paying it.
- I'm turning 65. What should I do first?About 3 months before your 65th birthday, sign up for Medicare Parts A and B at SSA.gov. TRICARE For Life activates automatically once both are effective and DEERS is current.
- Do I need Medicare Part A if I have TRICARE?Yes. TFL requires Part A and Part B. Part A is typically premium-free if you or your spouse worked 40+ quarters paying Medicare taxes.
- How long does Medicare enrollment take to process?Most online applications are approved in 1–3 weeks. SSA mails the Medicare card within about 30 days of approval.
- What is the 5-star Special Enrollment Period?A one-time-per-year chance (Dec 8 – Nov 30) to switch into a 5-star-rated Medicare Advantage or Part D plan in your area, outside the normal enrollment windows.
Related lessons
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Related Official Resources
Continue learning straight from the source. Every link below goes to an official government or DoD resource.
Last reviewed January 2026 against the 2026 Medicare & You and TRICARE For Life handbooks.