What Is W-9 Form?
The W-9 Form is a standard IRS document that serves a very specific and important purpose: collecting accurate taxpayer identification information from a U.S. person (individual, resident alien, sole proprietor, corporation, partnership, or other entity). You, as the payer, request this form from someone you're paying who is not an employee. The primary piece of information it gathers is the recipient's Taxpayer Identification Number (TIN). For individuals and sole proprietors, this is typically their Social Security Number (SSN). For companies, partnerships, or other entities, it’s usually an Employer Identification Number (EIN).
Beyond providing the TIN, the W-9 also certifies several key details. The recipient confirms their name and business name, if applicable, and their current address. Critically, by signing the W-9, they certify that the TIN is correct, that they are a U.S. person, that they are not subject to backup withholding (or are exempt), and, if needed, claim certain exemptions from FATCA (Foreign Account Tax Compliance Act) reporting. This information is vital for you to prepare the correct information returns, such as Form 1099-NEC, Nonemployee Compensation, which you'll later send to the IRS and the payee.