How to Find Your Taxable Income on Form 1040

Taxable income is not your W-2 wages

Wages on Form W-2 are a starting point, not the number the federal income tax brackets use. Taxable income is what remains after adjustments and either the standard deduction or itemized deductions (and other rules that apply to your return). That is why two people with the same salary can owe different federal income tax.

My Taxes asks for taxable income because that is the base the published IRS rate schedules apply to. Entering gross wages without deductions will usually overstate tax.

Where to look on Form 1040

On a completed Form 1040, look for the line labeled “Taxable income.” The exact line number can change by tax year, but the label stays consistent. Use that amount in the calculator for the matching tax year.

If you use tax software, the same figure usually appears on the Form 1040 summary or printable PDF. Match the tax year in My Taxes to the year on that return.

Estimating when you do not have a return

If you are planning ahead, start with expected wages and subtract the standard deduction for your filing status (and other known adjustments). The result is a rough taxable-income estimate—good enough to explore brackets, not precise enough for filing.

For prior years, last year’s taxable income is often a useful baseline if your situation did not change much. Adjust for raises, job changes, marriage, or large deductions.

State taxable income can differ

Many states start from federal numbers but add or subtract their own items. A state return’s taxable income may not equal federal taxable income. My Taxes applies state rate tables to the taxable income you enter; for a closer state estimate, use your state’s taxable income when you have it.

Next step

Ready to run the numbers? Open the federal and state tax calculator and enter your tax year, taxable income, state, and filing status.

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