What is W9?

• A. A form identifying insurance requirements
• B. A financial statement for tax purposes
• C. A request for taxpayer identification number and certification
• D. A warranty form

Answer: (C)

The form described is the Request for Taxpayer Identification Number and Certification. It’s the document you give to a person or business you’re paying so they can supply their correct taxpayer identification number (TIN) — typically a Social Security Number or an Employer Identification Number — and certify that the information is accurate. This helps you, the payer, report payments to the IRS correctly on information returns such as the 1099 series at year’s end. The certification also notes whether backup withholding applies to the recipient.

It’s not about insurance requirements, it isn’t a financial statement for tax purposes, and it isn’t a warranty form. It’s specifically for collecting the TIN and confirming the accuracy of that information so tax reporting can be done properly. If someone fails to provide a W-9, you may be required to apply backup withholding. For foreign individuals, different forms (like the W-8 family) are used. Knowing when to obtain a W-9 is important during vendor onboarding or before making payments to ensure proper tax reporting.