There are multiple definitions for Modified Adjusted Gross Income. Is this true?
It is really modified ADJUSTED GROSS INCOME. The AGI is specifically calculated then the modification is calculated in different ways depending on the application. Roth IRA contribution is one application and Social Security Medicare IRMAA is a totally different application so takes different factors into account. Both are used by those that receive Social Security. Very confusing.
Social Security Administration definition of modified AGI:
Social Security Handbook 2501. https://www.ssa.gov/OP_Home/handbook/handbook.25/handbook-2501.html
What is Modified Adjusted Gross Income (MAGI)?
Modified Adjusted Gross Income is the sum of: The beneficiary's adjusted gross income (AGI) (last line of page 1 of the IRS Form 1040 (U.S. Individual Income Tax Return)), plus Tax-exempt interest income (line 8b of IRS Form 1040)
How Is MAGI Used?
MAGI is used to determine if an Income-Related Monthly Adjustment Amount (IRMAA) applies. It is provided by IRS and is generally information that is two years prior (but not more than 3 years prior) to the year for which the premium is being determined. We will use the appropriate sliding scale table IRA (�2503) to determine the IRMAA.
Internal Revenue Service definition of modified AGI: (also used in TurboTax)
The IRS uses modified AGI to determine IRA contributions. See IRS publication 590-A page 53. The calculation uses AGI and SSA-1099. No mention of Tax-exempt income.
IRS and SSA both use the term: "Modified Adjusted Gross Income" but are calculated differently and result in different values. I have two very different Modified Adjusted Gross Income values.
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Yes there are several different MAGI for different things.
@robertshanebrook wrote:
There are multiple definitions for Modified Adjusted Gross Income. Is this true?
Yes, it's true. And there are more definitions than you seem to have realized. There isn't just one IRS definition of MAGI. The IRS has about ten different definitions of MAGI for different purposes, all related to income tax.
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