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The Seven MAGI Calculations

November 3, 2025
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Modified Adjusted Gross Income (MAGI) is a key calculation used by tax professionals and government agencies to determine an individual’s eligibility for various tax credits, deductions, and other considerations. It is based on an individual’s Adjusted Gross Income (AGI) with addbacks specified in the Internal Revenue Code. The concept of MAGI may seem straightforward; however, did you know that the IRS has seven separate definitions? Learn more about each definition and its benefits below:

MAGI Definition 1

Roth IRA Contribution Eligibility

Calculation:

MAGI Definition 2

Net Investment Income Tax

Calculation:

MAGI Definition 3

Coverdell ESA Contributions and Tax Credit Eligibility Phaseouts (Education, Clean Energy, Adoption, Child, and Savers credit)

Calculation:

MAGI Definition 4

Student Loan Interest Deduction Phaseout

Calculation:

MAGI Definition 5

IRA Deduction Eligibility

Calculation:

MAGI Definition 6

ACA Premium Tax Credit Eligibility

Calculation:

MAGI Definition 7

Medicare Part B/D Premiums (IRMAA)

Calculation:

With so many definitions of MAGI, it is vital for advisors to understand not only the calculations, but also how these definitions apply to client eligibility for tax-advantaged account contributions, deductions, credits, and even the cost of certain medical insurance premiums. This understanding can help you pinpoint areas where a client’s financial strategy can be significantly affected.

For Use with the General Public. Financial Planning and Advisory Services offered through Vicus Capital, Inc., a federally Registered Investment Advisor.

Categories: Financial Planning
Tags: ACA Premium Tax Credit Eligibility, Coverdell ESA Contributions and Tax Credit Eligibility Phaseouts, IRA Deduction Eligibility, Medicare Part B/D Premiums (IRMAA), Modified Adjusted Gross Income (MAGI), Net Investment Income Tax, Roth IRA Contribution Eligibility, Student Loan Interest Deduction Phasehout
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