Part-B Late Enrollment Penalty
If you don’t get Part B when you’re first eligible, your monthly premium may go up 10% for each 12-month period you could’ve had Part B, but didn’t sign up. In most cases, you’ll have to pay this penalty each time you pay your premiums, for as long as you have Part B. And, the penalty increases the longer you go without Part B coverage.
Usually, you don’t pay a late enrollment penalty if you meet certain conditions that allow you to sign up for Part B during a Special Enrollment Period.
Part-D Late Enrollment Penalty
The late enrollment penalty is an amount that’s permanently added to your Medicare drug coverage (Part D) premium. You may owe a late enrollment penalty if at any time after your Initial Enrollment Period is over, there’s a period of 63 or more days in a row when you don’t have Medicare drug coverage or other creditable prescription drug coverage. You’ll generally have to pay the penalty for as long as you have Medicare drug coverage.
The cost of the late enrollment penalty depends on how long you went without Part D or creditable prescription drug coverage.