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Taxable income

The amount your tax is actually computed on: gross income minus adjustments (which gives adjusted gross income), minus the standard or itemized deduction and the qualified business income deduction.

What is Taxable income?

The amount your tax is actually computed on: gross income minus adjustments (which gives adjusted gross income), minus the standard or itemized deduction and the qualified business income deduction.

Why it matters on your return

Every rate and bracket applies to taxable income, not to what you earned. Two people with the same salary can have very different taxable income depending on retirement contributions, deductions, and business losses.

Example

A single filer earns $100,000, contributes $10,000 to a 401(k), and takes the $16,100 standard deduction. Taxable income is $73,900, and the brackets apply to that.

Is taxable income the same as adjusted gross income?

No. AGI comes first; taxable income is AGI minus deductions. Phase-outs mostly use AGI or modified AGI, while the tax itself uses taxable income.

Source: IRC 63

Last reviewed September 17, 2026. Tax rules change; confirm current law before acting.

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