If a company or client has asked you to fill out a W-9, you may wonder what it is and why they need it. In the United States, a W-9 is a simple tax form used to collect your taxpayer identification information so that a business can report payments it makes to you. It is common for independent contractors, freelancers, and others who receive certain payments. Understanding it removes the mystery from a routine request. This guide from The Finance Reveal explains what a W-9 is, building on our guide to tax basics everyone should understand in the wider Taxes section. This is general education, not tax advice.

What a W-9 Is

A W-9 is a United States tax form on which you provide your taxpayer identification information, such as your name and taxpayer identification number, to a person or business that will be paying you. The party paying you requests the W-9 so they have the details needed to report those payments to the tax authorities, typically on an information return at the end of the year. You are essentially giving the payer the information they are required to have on file about you.

The reason W-9s are so common is that businesses must report many of the payments they make, and to do so accurately they need the recipient’s correct taxpayer information. This is why independent contractors, freelancers, and others who receive non-employee payments are frequently asked to complete one, a situation related to the income considerations our Making Money section explores.

How It Is Used

The W-9 itself is not sent to the tax authorities; it is kept by the payer and used to prepare reporting. The table below clarifies its role.

You complete a W-9 when a business needs your taxpayer information in order to report payments to you, and the payer keeps it on file rather than submitting the form itself. They use the information to prepare year-end reporting of what they paid you. Because a W-9 asks for sensitive identifying details, it is worth providing it only to legitimate parties who have a genuine reason to request it, keeping the record-keeping habits our guide to tax record-keeping describes.

Frequently Asked Questions

What is a W-9?

A W-9 is a United States tax form on which you provide your taxpayer identification information to a person or business that will pay you. The payer uses it to gather the details they need to report those payments to the tax authorities. It is commonly requested from independent contractors, freelancers, and others who receive certain non-employee payments.

What is a W-9 used for?

It is used to give a payer your correct taxpayer identification information so they can accurately report the payments they make to you. Businesses must report many payments, and the W-9 provides the recipient details they need to do so. The form is kept by the payer for their records and used to prepare year-end reporting, rather than being sent to the authorities.

Who has to fill out a W-9?

People and businesses being paid in ways that require the payer to report the payments are typically asked to complete a W-9. This commonly includes independent contractors, freelancers, and others receiving non-employee payments. If a legitimate business requests one because they need your taxpayer information to report what they pay you, completing it accurately is a normal part of that arrangement.

Is a W-9 sent to the tax authorities?

No, the W-9 itself is generally not sent to the tax authorities. Instead, the payer keeps it on file and uses the information to prepare their required reporting of the payments they made to you. Because it contains sensitive identifying details, you should provide a W-9 only to legitimate parties who have a genuine reason to request it.

The Bottom Line

A W-9 is a straightforward United States tax form that lets you provide your taxpayer identification information to a business that will be paying you, so they can accurately report those payments. It is commonly requested from independent contractors, freelancers, and others receiving non-employee payments, and rather than being filed with the authorities, it is kept by the payer for their records. Because it asks for sensitive details, it is wise to complete one only for legitimate parties with a genuine need. Understood simply, a W-9 is just the way a payer collects the tax information they are required to have about you. For more, see our guides to tax basics and tax record-keeping, and explore the full Taxes section. This article is general information, not tax advice, and tax forms and rules vary by country; the W-9 is a United States form.