SSA logo: link to Social Security Online home2505. How Does the Income-Related Monthly Adjustment Amount Affect the Total Medicare Premium?

The Income-Related Monthly Adjustment Amount (IRMAA) is only one part of the cost of a beneficiary's Medicare premium. The amount a beneficiary ordinarily pays for Part B each month consists of:

  • The Standard premium, plus

  • Surcharges that may be due for late enrollment or reenrollment (if applicable), plus

  • IRMAA (if applicable), minus

  • Medicare Advantage reduction in premium credited (if applicable), see §127.5.

The amount a beneficiary ordinarily pays for Part D each month consists of:

  • The premium amount for the plan for which the beneficiary has enrolled, plus

  • Surcharges that may be due for late enrollment or reenrollment (if applicable), plus

  • IRMAA (if applicable)

Last Revised: Aug. 10, 2011