Income Tax Calculator
Estimate 2026 U.S. federal income tax using filing status, income, and deductions.
Last updated: October 15, 2026
Estimated federal income tax
$0.00
- Taxable income: $0.00
- Marginal rate: 0%
- Effective rate: 0%
- After federal tax: $0.00
On this page
Quick summary: Estimate 2026 U.S. federal income tax using filing status, income, and deductions.
Read the method, example and limitations
Updated reference sections in this guide are in English.
Guide language: English. Updated October 15, 2026.
What this calculator estimates
The Income Tax Calculator estimates tax from taxable income and the rate assumptions built into the page. It is useful for rough planning, not for filing an official tax return.
Inputs and units
Enter Filing status, Annual gross income ($), Deduction, Custom deduction ($). Use the units shown. Required fields cannot be blank. Use zero only where that field and the model allow it. Select Calculate after changing the values.
Method and assumptions
Use the 2026 federal brackets for the selected single, joint or head-of-household status. Subtract the standard deduction or the entered custom deduction, floor taxable income at zero and apply each marginal rate only to its bracket portion.
Worked example
A single filer entering 85,000 income and the 16,100 standard deduction has 68,900 modeled taxable income and 9,870 federal income tax before credits and other adjustments.
Limitations
The income input should represent the amount before the deduction selected here; do not subtract that same deduction twice. Credits, payroll tax, state tax, AMT, special deductions and different income-character rules are not included. This is not a tax-return preparation tool.