MA Open Enrollment is open — 50 days left

Medicare Part B Late Enrollment Penalty Calculator 2026: How to Calculate and Avoid Costly Penalties

Use our Medicare Part B penalty calculator to determine your 2026 late enrollment costs. Learn how penalties are calculated and strategies to avoid them.
Reviewed by Aaron Sims, Licensed Life & Health Agent since 2012Last updated February 9, 2026
A teal calculator and white pen on a white surface.
Photo by Sasun Bughdaryan on Unsplash