Modified Adjusted Gross Income is a measure used by the IRS to determine if a taxpayer is eligible to use certain deductions, credits, or retirement plans. Beginning in 2014, individuals who purchase health insurance coverage through one of the new health insurance exchanges will be eligible for financial assistance if their income is no more than 400% of the federal poverty line (FPL). “Modified Adjusted Gross Income” (not "Adjusted Gross Income") will be used in determining eligibility for these premium tax subsidies.
What is Adjusted Gross Income?
Generally, your Adjusted Gross Income (AGI) is your household's income less various adjustments. Adjusted Gross Income is calculated before the itemized or standard deductions, exemptions and credits are taken into account.
What is Modified Adjusted Gross Income?
Generally, your Modified Adjusted Gross Income (MAGI) is the total of your house hold's Adjusted Gross Income and any tax-exempt interest income you may have (these are the amounts on lines 37 and 8b of IRS from 1040).
How to Calculate Your Gross Income (GI)
How to Calculate Your Modified Adjusted Gross Income (MAGI)
Once you have adjusted gross income, you "modify" it to calculate your MAGI.
Specifically, Modified Adjusted Gross Income (MAGI) is calculated by adding back certain items to your Adjusted Gross Income including:
Deductions for IRA contributions.
Deductions for student loan interest or tuition.
Excluded foreign income.
Interest from EE(employee) savings bonds used to pay higher education expenses.
Employer-paid adoption expenses.
For most people, MAGI is the same as AGI.
Why Your MAGI Matters
The IRS phases out credits and deductions as your income increases. By adding MAGI factors back to your AGI, the IRS determines how much you really earned. Based on that, it determines whether you can take full advantage of special tax credits.
Beginning in 2014, your MAGI determines whether you will be eligible for premium tax credits on the new health insurance exchanges.