Question: is irmaa indexed for inflation?
Answer: IRMAA Brackets The IRMAA income brackets (except the very last one) started adjusting for inflation in 2020. ... Remember the income on your 2019 tax return (AGI plus muni interest) determines the IRMAA you pay in 2021. The income on your 2020 tax return (to be filed in 2021) determines the IRMAA you pay in 2022.