How Federal Income Tax Brackets Work in 2026
A worked example explains how the 2026 federal tax brackets apply progressively to taxable income.
By Farrow (pseudonym; identity and professional credentials are not disclosed) · October 31, 2026. This guide is educational information, not tax advice.
How Federal Income Tax Brackets Work in 2026
The United States uses a progressive federal income tax. That means separate portions of taxable income are taxed at different rates; reaching a higher bracket does not cause all your income to be taxed at the higher rate. A marginal bracket describes the rate on the next dollar of taxable income, while an effective rate compares the total tax with a broader income amount.
A 2026 single-filer example
Consider a single filer with $85,000 in total income, $6,000 of pre-tax adjustments and no tax credits. Using the $16,100 2026 standard deduction, taxable income is $85,000 - $6,000 - $16,100 = $62,900. The example assumes ordinary income, the standard deduction and no additional adjustments or credits.
Apply the 2026 single-filer brackets to each slice of the $62,900: 10% on the first $12,400 is $1,240; 12% on the next $38,000 (from $12,400 to $50,400) is $4,560; and 22% on the remaining $12,500 is $2,750. The estimated federal income tax is therefore $1,240 + $4,560 + $2,750 = $8,550 before credits.
The highest slice falls in the 22% marginal bracket, but the effective rate on the original $85,000 of total income is $8,550 / $85,000 = 10.06%. This example illustrates why the marginal rate and effective rate are different. A deduction changes taxable income; a tax credit, if eligible, reduces tax after the bracket calculation.
What this example leaves out
This is a simplified federal estimate, not a tax return. It does not include investment income taxed at special rates, the alternative minimum tax, self-employment tax, state or local tax, every available deduction, or individual credit eligibility. Filing status, age, dependent status and other facts can change the result. Confirm the current IRS instructions for your filing year.
Try your own numbers with the 2026 federal income tax calculator. Its results are estimates; review the linked IRS sources and speak with a qualified tax professional when you need advice for your situation.