W-4 Calculator
Estimate your federal income tax withholding using the IRS percentage method. Enter your W-4 information, pay frequency, and earnings to see how much tax should be withheld from each paycheck. Updated for the One, Big, Beautiful Bill Act (OBBBA).
What Is Form W-4?
Form W-4 (Employee's Withholding Certificate) is an IRS form that tells your employer how much federal income tax to withhold from your paycheck. The amount withheld is based on your filing status, number of dependents, and any additional adjustments you want to make.
The 2026 W-4 form has been updated for the One, Big, Beautiful Bill Act (OBBBA), which made permanent many provisions of the Tax Cuts and Jobs Act. The form now includes a clear "Exempt from withholding" checkbox and increased standard deduction amounts.
How the W-4 Calculator Works
This calculator uses the IRS percentage method to estimate your withholding:
Step 1: Annualize your taxable pay: (Gross Pay − Pre-Tax Deductions) × Number of Pay Periods
Step 2: Add other income and subtract your standard deduction and any additional deductions (senior, blind, itemized).
Step 3: Apply the 2026 tax brackets to your taxable income to calculate annual tax liability.
Step 4: Divide the annual tax by the number of pay periods and add any extra withholding.
2026 Standard Deductions: Single/MFS $16,100, Married $32,200, Head of Household $24,150. 2026 Tax Brackets: 10%, 12%, 22%, 24%, 32%, 35%, and 37%.
How to Fill Out a W-4 in 2026
- Step 1: Enter your personal information and filing status.
- Step 2: Multiple jobs or spouse works, adjust withholding if you have more than one job.
- Step 3: Claim dependents, each dependent reduces your withholding.
- Step 4: Other adjustments, other income, deductions, and extra withholding.
- Step 5: Sign and date the form.
This calculator follows the same structure as the 2026 Form W-4, making it easy to transfer your results to the actual form.
❓ W-4 Calculator FAQ
What is a W-4 form?
Form W-4 is an IRS form that tells your employer how much federal income tax to withhold from your paycheck. It's based on your filing status, dependents, and other adjustments.
What is the standard deduction for 2026?
For 2026, the standard deduction is $16,100 for single filers and married filing separately, $32,200 for married filing jointly, and $24,150 for head of household.
What are the 2026 federal tax brackets?
The 2026 tax brackets are 10%, 12%, 22%, 24%, 32%, 35%, and 37%. The income thresholds vary by filing status.
How is federal income tax withholding calculated?
Your employer calculates withholding using your Form W-4 information, your pay frequency, and the IRS withholding tables in Publication 15-T.
What is the difference between withholding and actual tax liability?
Withholding is an estimate of the tax you'll owe, taken from each paycheck. Your actual tax liability is calculated when you file your tax return. If too much was withheld, you get a refund. If too little was withheld, you owe taxes.
How do I fill out a W-4 form in 2026?
The 2026 W-4 has five steps: Step 1 (personal information), Step 2 (multiple jobs), Step 3 (dependents), Step 4 (other adjustments), and Step 5 (signature).
What is the One, Big, Beautiful Bill Act (OBBBA)?
OBBBA is legislation passed in July 2025 that made permanent many provisions of the Tax Cuts and Jobs Act, including the individual tax rates and increased standard deduction.
How do I adjust my withholding if I have multiple jobs?
Use Step 2 of Form W-4. The calculator includes an option to account for other income, which helps prevent under-withholding when you have multiple jobs or a working spouse.
What is the Child Tax Credit for 2026?
The Child Tax Credit is $2,000 per qualifying child. The calculator uses this default value and allows you to adjust it if needed.
What is the supplemental wage withholding rate for 2026?
The supplemental wage withholding rate (for bonuses, commissions, etc.) is 22% for amounts up to $1 million, and 37% for amounts over $1 million.
What is the backup withholding rate for 2026?
The backup withholding rate for 2026 is 24%.
How do I claim exempt from withholding?
On the 2026 Form W-4, you can check the new checkbox below Step 4(c) to claim exemption from federal income tax withholding.
What is the Social Security wage base for 2026?
The Social Security wage base for 2026 is $184,500. Earnings above this amount are not subject to Social Security tax.
How accurate is this W-4 calculator?
This calculator provides an estimate based on the IRS percentage method and 2026 tax rates. For precise withholding, use the IRS Tax Withholding Estimator or consult a tax professional.
How often should I update my W-4?
You should update your W-4 whenever your financial situation changes, marriage, divorce, birth of a child, second job, or significant income changes. The W-4 isn't a "set it and forget it" form.
What is the difference between the percentage method and the wage bracket method?
The percentage method applies the tax brackets to your income and is used by automated payroll systems. The wage bracket method uses tables to look up the withholding amount based on your pay and filing status.
Does the calculator include state taxes?
No. This calculator only estimates federal income tax withholding. State and local taxes vary by state and are not included.
What is the difference between gross pay and taxable pay?
Gross pay is your total earnings before any deductions. Taxable pay is gross pay minus pre-tax deductions like 401(k), HSA, and health insurance premiums. Only taxable pay is subject to federal income tax withholding.