What is W-9 Form?

W-9 Form is a tax form used by individuals and businesses in the United States to provide their taxpayer identification number (TIN) to a person or entity that will be making payments to them. The form is typically used by independent contractors, freelancers, and other non-employees to report income earned. It is also used by businesses to report payments made to vendors and contractors for tax purposes. The information on the W-9 Form helps the payer issue the appropriate tax documents, such as the 1099 form, at the end of the year.