What is a W-4 Tax Form?

Updated on January 2, 2024

  1. OnPay
  2. Payroll Software
  3. Terms and Definitions
  4. W 4 Tax Form

W-4 definition and meaning

A W-4 tax form is an IRS document that every new employee completes. It is used to determine what taxes should be withheld from their pay by a new employer.


More about W-4 tax forms

Last revised in 2020, the current W-4 uses a five-step process for determining employee withholding. Not only should it be filled out when an employee is hired, but also any time their life or financial situation changes.

Using W-4 in a sentence

“When I changed jobs, I decided to claim myself as a dependent, not realizing it would mean I’d owe taxes at the end of the year.”

Top-rated payroll


It’s easy to get started

Try OnPay out yourself to see how easy payroll and HR can be. To get started, just share a few basic details about your business. Our team of pros will set everything up and import your employees’ information for you.

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.