If you are referring to Medicare Part B premiums - they are calculated by your IRS tax returns - 2 years prior. So if you retire in 2014, you would sign up for Medicare A (if you haven't already) and Part B. The premium for Part B will be calculated by your 2012 tax return. In 2015 it will be calculated by your 2013 tax return, 2016 by your 2014 tax return and so on.
Hope that helps!
Belinda
www.myseniorventure.com/answers
805-262-7970
Hope that helps!
Belinda
www.myseniorventure.com/answers
805-262-7970