Turning 65 · Tool 4 of 4
Late Enrollment Penalty Estimator
See one year of the and late penalty, in dollars. The extra usually continues for as long as you have or .
Full 12-month blocks count (2026 standard premium $202.90).
Each month after IEP without creditable Rx coverage (base $38.99).
1-year estimated extra
$300.00
One year of the Part B and Part D late penalty combined. This is the extra only, on top of regular premiums.
Part B late penalty
$20.30/mo
1 full year(s) · standard premium becomes $223.20/mo
Part D late penalty
$4.70/mo
Added on top of your plan’s premium
Penalty add-up · 1-year estimate
Part B late penalty (1 year)
1 full year(s) × 10% = 10% × $202.90 = $20.30/mo × 12
$243.60
Part D late penalty (1 year)
12 uncovered month(s) × 1% × $38.99 = $4.70/mo × 12 (rounded to nearest $0.10)
$56.40
1-year estimated extra
Part B annual LEP + Part D annual LEP (on top of regular premiums)
$300.00
- Part B LEP uses 10% of the standard premium ($202.90 in 2026) for each full 12-month period you could have had Part B but didn’t.
- Part D LEP uses 1% of the national base beneficiary premium ($38.99 in 2026) for each full uncovered month, rounded to the nearest $0.10.
- Both penalties usually continue for as long as you have Part B or Part D and can change as national premium figures change. This box shows one year of the extra cost only.
- This estimate does not include a Part A premium penalty. People who pay a Part A premium can owe one if they delay Part A.
- Months with Extra Help or qualifying creditable coverage may not count—confirm with Medicare or your agent.
For official information and to compare all plans in your area, visit Medicare.gov or call 1-800-MEDICARE (TTY 1-877-486-2048). Related: Part B and Part D late penalties.
Educational estimates only—not Medicare, CMS, or Social Security advice. Figures use published 2026 reference amounts and can change. A licensed agent can review your situation before you choose or change coverage.