Join today and get three months free.
*Claim offer
Table of contents

W-4 Form

Definition: Form W-4 is important for employers and employees. It indicates the amount of federal taxes withheld, which affects year-end tax refunds or liabilities.
This is some text inside of a div block.
July 2, 2025
5 min read

All U.S. employees and employers need to understand IRS Form W-4.  

Form W-4, Employee’s Withholding Certificate, determines the amount of federal tax an employer withholds from an employee's paycheck.  

Every employee who receives a paycheck must complete Form W-4. It’s necessary to complete one when starting a new job. It’s a good idea to update it to reflect life changes like marriage or having children. Employees can also adjust their withholding for more precise tax management using Form W-4.

Proper completion helps ensure the right federal tax withholding, which affects year-end tax refunds or tax liabilities.

Learn more about Form W-4, employer and employee responsibilities, tips to filling it out, and answers to frequently asked questions in What is Form W-4.  

This content is for educational purposes only, is not intended to provide specific legal advice, and should not be used as a substitute for the legal advice of a qualified attorney or other professional. The information may not reflect the most current legal developments, may be changed without notice and is not guaranteed to be complete, correct, or up to date

Related Terms
Small Business Solutions. Simplified.

You deserve simple solutions from the people who care about your success.

Get started