When and how to complete Form W-9

Quick answer: A W-9 isn't filled out for an "employer" in the traditional sense — it's a form you give to a business that pays you as a non-employee (like a client paying an independent contractor) so they can report those payments to the IRS. If you're a true employee, you'd fill out a Form W-4 instead, not a W-9.

Explanation

The documents provided don't include the actual W-9 form or its line-by-line instructions, but IRS Publication 583 explains when and why a W-9 is used. It's the form a business uses to collect your Social Security Number (SSN) or Employer Identification Number (EIN) when they need to report payments they make to you:

To get the payee's SSN or EIN, use Form W-9, Request for Taxpayer Identification Number and Certification. For more information, see IRS.gov/FormW9.¹

This typically applies when you make payments to someone who is not your employee and you must report the payments on an information return — you get that person's SSN, or if you make reportable payments to an organization, such as a corporation or partnership, you must get its EIN.²

Important distinction: If you're asking about a W-9 because a business called you an "employer" relationship, double check the actual working relationship:

• Employees have taxes withheld from paychecks and generally fill out Form W-4, not a W-9.
• Independent contractors / self-employed workers (1099 workers) are the ones typically asked for a W-9 by the businesses that pay them.

A caution worth noting: if you don't provide your correct number on the W-9, you may have to withhold part of the payments as backup withholding. For information on backup withholding, see the Instructions for the Requester of Form W-9 and the General Instructions for Certain Information Returns.³

What it depends on:

• Whether you're actually an employee (W-4) or an independent contractor/vendor (W-9)
• Whether you're filling this out as an individual (use your SSN) or as a business entity like an LLC or corporation (use an EIN)
• Since the documents here don't contain the W-9's actual instructions (e.g., how to complete the certification, backup withholding checkbox, or exemption codes), I can't walk through each line

A note on privacy: never share your SSN or EIN with me or post it publicly — only provide it directly on the official form to the requesting business.

Because getting your worker classification and W-9 entries wrong can trigger backup withholding or IRS mismatches, it's worth a quick check with a CPA if you're unsure whether you should be receiving a W-9 request at all or how to classify your work.