That is correct. IRMAA MAGI is AGI (1040 line 11) plus tax-exempt interest (1040 line 2a).If you look at Table 1 near the end of the article entitled "Additions and Subtractions to Federal Adjusted Gross Income (AGI) to Calculate Modified Adjusted Gross Income (MAGI) for Health Programs" it indicates that the non-taxable portion of Social Security benefits are NOT included in the IRMMA MAGI calculation.
For my planning, I just assume 85% of SS will be taxable because, for us, it will be. If less will be taxable, adjust accordingly. Far easier IMHO than what you want to do which is calculate the non-taxable portion of SS and then add it to the IRMAA cutoffs.
Statistics: Posted by lstone19 — Wed Jan 01, 2025 2:42 pm