What Income and Deductions Are Included in the AGI Calculation?
Gross income includes wages, salaries, tips, freelance income, investment income, rental income, alimony received before 2019, and taxable Social Security benefits. Above-the-line deductions that reduce it include traditional IRA contributions, student loan interest, educator expenses, alimony paid before 2019, and half of self-employment tax.
Why Does Your AGI Matter Beyond Just Filing Taxes?
AGI determines eligibility for Roth IRA contributions, the Child Tax Credit, education credits, and the deductibility of traditional IRA contributions. It also sets the threshold for medical expense deductions (7.5% of AGI) and affects Medicare premium surcharges. Lenders, financial aid formulas, and some insurance programs also reference AGI.
How Is Modified Adjusted Gross Income Different From AGI?
Modified adjusted gross income (MAGI) adds back certain deductions — student loan interest, IRA deductions, or foreign income exclusions — to AGI, depending on which rule is being applied. The IRS uses different MAGI definitions for different phase-outs, so a single taxpayer may have multiple MAGI figures for different purposes.
Frequently asked questions
Where do I find my AGI on my tax return?
Your AGI appears on Line 11 of Form 1040. If you need last year's AGI to e-file — as identity verification — look at last year's return or request your tax transcript from the IRS online account portal.
Can reducing my AGI increase my eligibility for tax breaks?
Yes. Lowering AGI through above-the-line deductions — maximizing HSA and IRA contributions, for example — can unlock credits that phase out at higher income levels, reduce your Medicare surcharge, and make more of your medical expenses deductible.