AGI Calculator — Adjusted Gross Income

Written by Great Medico

Updated September 25, 2026 •2 min read

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AGI Calculator — Adjusted Gross Income is useful when you want a fast answer without losing sight of the assumptions behind it. It builds an adjusted-income estimate from the income and adjustment categories displayed on the form.

What this calculator does

AGI Calculator — Adjusted Gross Income builds an adjusted-income estimate from the income and adjustment categories displayed on the form. The visible inputs are salary, business income, investment-type income, capital gains, pension or ira distributions, and the adjustment fields shown. Its result is driven by those values, so the calculation can be reproduced or stress-tested without relying on a hidden live-data feed.

How to use it

Enter salary, business income, investment-type income, capital gains, pension or IRA distributions, and the adjustment fields shown. Keep all monetary inputs in the same currency; the currency selector formats results and does not perform foreign-exchange conversion. Before calculating, recheck Salary, wages and tips, Business / self-employment, Interest, dividends, royalties, etc. against the source values you intend to model. Use the labels on AGI Calculator — Adjusted Gross Income as the source of truth and recheck any prefilled value before relying on the result.

How the calculation works

For AGI, the calculator combines the entered income components and subtracts the entered adjustment items. For MAGI, it starts from AGI and adds back the specific modification fields shown on that calculator. AGI Calculator — Adjusted Gross Income applies that relationship only to the inputs represented on its form. If the result looks surprising, verify the entered values, units, and signs before interpreting the number.

Example

If total entered income is $90,000 and the displayed above-the-line adjustments total $7,000, the simplified AGI is $83,000. A MAGI calculation would then add back only the modification items entered on its form. The example is a math check for AGI Calculator — Adjusted Gross Income; replace the sample values with your own inputs rather than treating the example as a target or recommendation.

How to interpret the result

AGI and MAGI are intermediate tax figures used by many tax rules, but different programs can define MAGI differently. The calculator is most useful for organizing the displayed components, not for deciding eligibility by itself. The number is most useful when compared with another scenario built from the same definitions.

Limitations and notes

Tax definitions and allowable adjustments change by year, filing situation, and program. The calculator includes only the categories displayed on the form and cannot determine whether a particular amount is legally deductible or must be added back. Recalculate when rates, prices, balances, dates, or policy assumptions change.