IRMAA (Medicare income-related monthly adjustment amount)

Definition#

Income-Related Monthly Adjustment Amount. A Medicare premium surcharge based on modified AGI from two years earlier.

High income in 2024 increases your Medicare premiums in 2026. Roth conversions can trigger this.

Used in ArthaPilot#

• Roth conversions with IRMAA and ACA
• Roth conversion calculator
• Decumulation Studio

Related terms#

• Marginal vs effective tax rate
• MAGI (modified adjusted gross income)
• AMT (alternative minimum tax)
• ISO (incentive stock option)
• Safe withdrawal rate (SWR)