Medicare's late-enrollment penalties aren't one-time fees — they're added to your premium every month for the rest of your life. Enter how long you delayed (or are thinking of delaying) Part B or drug coverage and see the real price, this year and over a decade.
Free help confirming your enrollment window and whether your coverage counts as creditable. No pressure, no obligation.
Estimates only. This calculator applies the published penalty formulas using 2026 amounts — the $202.90 standard Part B premium and $38.99 Part D national base beneficiary premium. Actual penalties are determined by the Social Security Administration and your plan, depend on your exact months of non-creditable coverage, and recalculate each year as base amounts change. Penalties may not apply if you had creditable coverage or qualify for Extra Help. Smooth Health Solutions is not connected with or endorsed by the U.S. government or the federal Medicare program.
Both penalties are permanent. Part B: 10% of the standard premium for every full 12-month period you could have enrolled but didn't — on a 2026 standard premium of $202.90, a two-year delay adds about $487 a year, every year, and grows as premiums rise. Part D: 1% of the national base premium per month without creditable drug coverage — smaller per month, but it starts after just 63 days uncovered and never goes away either.
The system has a built-in escape hatch most people don't know: creditable coverage. Active employer coverage (20+ employees) lets you delay Part B penalty-free with an 8-month enrollment window when it ends — but COBRA and retiree plans don't count, which is where people get burned.
Usually. Active employment coverage (yours or your spouse's, employer with 20+ employees) is creditable for Part B, and you get an 8-month Special Enrollment Period when it ends. Drug coverage at least as good as Part D — your plan mails a creditable-coverage notice yearly — avoids the Part D penalty. The traps: COBRA and retiree coverage do not count for Part B.
Generally no — they're lifetime. Exceptions: Extra Help wipes the Part D penalty, and you can request reconsideration if a plan or the government misinformed you. Otherwise, prevention is the only cure.
You don't need it, but skipping it starts the penalty meter after 63 days. Many healthy enrollees buy the cheapest Part D plan in their area purely as penalty insurance — often a few dollars a month, versus a penalty that compounds for life and a coverage gap if a diagnosis arrives mid-year.
No premium penalty — but Medigap has a one-time protection instead: the 6-month window starting with Part B is the only time carriers in most states must take you regardless of health. Miss it and future applications can be underwritten, rated up, or declined.
New to Medicare? Start with the 2026 Medicare guide — Parts A–D, real costs, enrollment windows, and the full Medigap chart, plus a free printable version.