T0 calculate my MAGI in order to know how much I can contribute to a Roth IRA, I know that I have to add in my nontaxable Social Security. I also have other nontaxable retirement income. Do I need to add that back to my AGI?
Expert Reviewed
You are looking at the wrong MAGI definition, probably the one for determining Premium Tax Credits under the Affordable Care Act. The calculation of MAGI for the purpose of a Roth IRA contribution is described in IRS Pub 590-A:
https://www.irs.gov/publications/p590a#en_US_2025_publink1000230985
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