W4 Withholding Calculator
Optimize your W-4 form allowances to get the right amount of tax withheld from paychecks. Enter values for instant results with step-by-step formulas.
Reviewed for accuracy by Sahil, Senior Finance & Tax Editor
Enter your values below. Every result is computed in your browser — no data is sent to any server.
Formula: Withholding = Federal Tax on (Income - Std Deduction - Credits) / Pay Periods + Additional
Worked example — ~$320.81 withheld biweekly
Withholding = Federal Tax on (Income - Std Deduction - Credits) / Pay Periods + Additional
The W-4 form determines how much federal tax your employer withholds. Child tax credit is $2,000/child. Other dependents credit is $500 each. Standard deduction for 2024: single $14,600, married $29,200.
Problem:$75,000 annual, single, 0 dependents
Solution:Taxable = $75,000 - $14,600 = $60,400. Tax = $1,160 + $4,266 + $2,915 = $8,341
Result:~$320.81 withheld biweekly
Claiming exempt on the W-4 tells your employer to withhold zero federal income tax from your paychecks. You can only legally claim exempt if you had no federal tax liability the prior year AND expect no liability this year. If you claim exempt incorrectly and owe taxes at year-end, you will owe the full amount plus potential underpayment penalties. Exempt status must be re-claimed on a new W-4 each year by February 15.
Federal income tax (per W-4), Social Security (6.2%), Medicare (1.45%, plus 0.9% above $200K), and state/local taxes. Self-employed pay both halves (15.3% total FICA).
Reviewed for accuracy by Sahil, Senior Finance & Tax Editor · Editorial policy
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