Why would a vendor ask for a W9?
Sarah Duran
Published Apr 17, 2026
The IRS recommends that you request all vendors submit a W-9 when you plan to make payments to them of $600 or more, if they are individuals or independent contractors, an estate or part of a domestic trust, partnership companies, corporations, a limited liability company, associations or organizations created in or …
Can I pay someone without a W9?
If you don’t fill out a W-9 duly requested by an employer, partner or other entity duly entitled to your taxpayer ID information, you may be penalized $50 for each instance. You may also be subject to backup withholding, which means the payor will withhold 28 percent of your check and forward the proceeds to the IRS.
Do I need a W-9 from my accountant?
We strongly recommend that you request a W-9 from all vendors you do business with (with the exception of public companies). This will allow you to accurately generate the required 1099’s and if you are ever audited, you can produce the W-9’s and show that you are in compliance.
A W-9 form provides you with the vendor’s legal name, TIN number, tax classification, address, and exemption/FATCA status. This information is then used to process a 1099 form at year-end if required. Getting W-9s upfront will help you avoid many headaches and streamline your year-end W-9/1099 process.
How are vendors required to submit a W-9?
Vendors Required to Submit W-9. Purchasing and Accounts Payable require that new vendors fax a signed W-9 form directly to a secure server, in order to get set up in the BruinBuy system. When possible, it is best to use the many existing vendors and contracts that have already been established by the University.
Can a company use its own W9 form?
The IRS allows companies to use their own forms rather than Form W-9 if it requests substantially similar information. For example, a company may create its own vendor setup form and mail it to all new vendors. This form could include both vendor information specific to the company as well as the information contained on Form W-9.
Do you need a W-9 to get a tin?
A Form W-9 facilitates obtaining this information, and in certain situations, you may be required to request the TIN with a Form W-9. Vendors that refuse to provide a TIN are subject to backup withholding, and your business can be penalized for not withholding the required amount.
Where do I upload my W-9 form?
Purchasing and Accounts Payable require that new vendors upload a current, signed and dated W-9 form directly to a secure web service at: