Taxable Income

Taxable income is the amount actually used to calculate how much tax you owe, arrived at after subtracting deductions and exemptions from your gross earnings. It's a smaller number than your gross salary or total income, and it's the figure tax brackets are applied to.

The path runs from gross income, to adjusted gross income after above-the-line adjustments, to taxable income after subtracting the standard deduction or itemized deductions. The Federal Income Tax Calculator walks through each of these steps to arrive at your final taxable income and tax owed.

Taxable Income = Gross Income − Above-the-Line Adjustments − Standard Deduction (or Itemized Deductions)

Someone earns $85,000 in gross wages, contributes $5,000 to a traditional 401(k), and takes the standard deduction of $15,000 (single, 2026).

• Adjusted gross income: $85,000 − $5,000 = $80,000
• Taxable income: $80,000 − $15,000 = $65,000

Tax brackets apply only to that $65,000, not the original $85,000 gross salary.

• Two people with the same gross income can have very different taxable income. Deductions, retirement contributions, and filing status all shift the final number substantially.
• Some income is taxed at different rates within the same return. Ordinary income (wages) and long-term capital gains are both part of taxable income, but taxed under separate rate schedules.
• It can't go below zero. If deductions exceed gross income, taxable income floors at zero rather than creating a negative liability to carry forward.
• Pre-tax retirement contributions reduce taxable income today. Traditional 401(k) and IRA contributions lower this figure now, in exchange for taxing withdrawals later in retirement.
• State taxable income often differs from federal. States frequently define their own deductions and adjustments, so your state taxable income figure can diverge from the federal one on the same return.