Part B Late Enrollment Penalty
Medicare Part B late enrollment penalty.
Open the tool → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Months late, not counting special enrollment months
- 38
- Premium year
- 2026
Result: Part B late penalty 30% (3 full 12-month periods in 38 months late): $60.87 a month on a $202.90 premium, $263.77 in all.
The tool opens with these values already filled in. Replace them with your own.
What you enter
- Months late, not counting special enrollment months
- Premium year (blank for this year)
- Standard Part B premium, if not the published figure
How this is calculated
Citation
42 CFR 408.22: the standard Part B premium rises 10 percent for each full twelve months of late enrollment. 2026 standard premium $202.90 (CMS 2026 Parts A and B fact sheet). Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.