© 2026 CoAd. All rights reserved.
Form W-4, Employee’s Withholding Certificate, is an IRS form employees complete to tell their employer how much federal income tax to withhold from each paycheck. Employees generally complete one when they start a new job and may submit a new form when their tax situation changes.
Form W-4, Employee's Withholding Certificate, is an IRS form employees use to provide the information their employer needs to calculate federal income tax withholding from their pay. Employees typically complete a W-4 when they start a new job and can submit an updated form when their personal or financial situation changes.
The form asks for information such as filing status and may include adjustments for multiple jobs, dependents and tax credits, other income, deductions, or an additional amount the employee wants withheld. Employers use those elections along with IRS withholding tables to determine how much federal income tax to take out of each paycheck.
A W-4 doesn't determine an employee's final tax bill. Instead, it helps estimate how much federal income tax should be withheld throughout the year. If too little is withheld, the employee may owe money when filing their tax return. If too much is withheld, the employee may receive a refund.
Employees aren't limited to completing a W-4 once. The IRS recommends considering a new form each year and when personal or financial circumstances change, such as getting married, having a child, taking on another job, or experiencing a significant change in income.
Employers are responsible for keeping an employee's W-4 on file and using it to calculate withholding. If an employee doesn't provide a properly completed Form W-4, federal withholding generally must be calculated as if the employee is single or married filing separately with no adjustments in Steps 2, 3, or 4.
Form W-4 tells an employer how to calculate the federal income tax withheld from an employee's paycheck. It includes information about the employee's filing status and any applicable withholding adjustments.
Employees generally complete a W-4 when they start a new job. They may also want to submit a new form when their income, family situation, number of jobs, deductions, or tax credits change.
Not necessarily. An existing Form W-4 generally stays in effect until the employee submits a new one, although the IRS recommends reviewing withholding periodically and considering an updated form when circumstances change.
If an employee doesn't provide a properly completed W-4, the employer generally must calculate federal income tax withholding as if the employee is single or married filing separately with no other adjustments entered on the form.
No. Employees complete Form W-4 to provide withholding instructions to their employer. Employers provide Form W-2 after the end of the year to report the employee's wages and taxes withheld.