IRMAA, the Income Related Monthly Adjustment Amount, is the Medicare Part B & D surcharge levied against high earning Medicare Beneficiaries. In 2020, this affects individual filers with a Modified Adjusted Gross Income (MAGI) greater than $87,000 and joint filers with MAGI greater than $174,000 face Medicare Part B & D premiums higher than the baseline premium. These high earning beneficiaries can look for mail from Medicare each year, indicating their penalty amount. If they have a drastic change to life or income, they can also appeal their penalty using SSA Form 44.