How Much Is Medicare Deduction From Social Security? 
If you are referring to Medicare Part B - which is an auto deduction out of your SS check , if you are currently taking SS ... the average person pays $ 104.90 for Part B . So $ 104.90 would be deducted from your monthly SS check . However if your income is above $ 80,000 as a single person , or $ 170,000 as a married person , then you will have a surcharge above the $ 104.90 . You can go to the Medicare website for a complete chart . You can also have your Medicare Part D plan premium deducted monthly if you so choose . But B is not a choice if you are taking SS and on Medicare . 