You may have to pay an Income Related Monthly Adjustment Amount (IRMAA) if your income is greater than $109,000 for a single adult or $218,000 for joint tax filers. The income is the Modified Adjusted Gross Income which is comprised of your AGI plus tax exempt interest. The income year is 2 years prior. For 2026, Social Security uses the 2024 tax return to determine if you are subject to the IRMAA.











