Form W-9, officially titled Request for Taxpayer Identification Number and Certification, is a form businesses use to collect tax information from independent contractors, freelancers, vendors, and other non-employees.
The information on Form W-9 helps businesses correctly report certain payments to the IRS, typically on Form 1099-NEC or other information returns.
If you're filing your personal tax return, you generally don't need to enter or upload a Form W-9. The form is primarily used between the payer and the person or business receiving payment.
What Information Does Form W-9 Include?
A Form W-9 collects basic taxpayer identification information, including:
- Name
- Business name (if applicable)
- Federal tax classification
- Address
- Taxpayer Identification Number (TIN)
- Social Security Number (SSN) or Employer Identification Number (EIN)
- Certification regarding backup withholding requirements
Because the form contains sensitive information, it should only be provided to legitimate businesses that need it for tax reporting purposes.
Who Uses Form W-9?
Businesses
Businesses often request a Form W-9 before paying a contractor, freelancer, consultant, or vendor.
The information is used to:
- Verify the recipient's taxpayer information
- Prepare Forms 1099 when required
- Comply with IRS information reporting requirements
Independent Contractors and Freelancers
Independent contractors, gig workers, freelancers, and self-employed individuals commonly complete Form W-9 when beginning work with a new client.
Once completed, the contractor returns the form directly to the business requesting it.
Form W-9 Is Not Sent to the IRS
One of the most common misconceptions about Form W-9 is that it gets filed with the IRS.
It does not.
Instead:
- The contractor completes the form.
- The business keeps the form in its records.
- The information is later used to prepare information returns, such as Form 1099-NEC.
The IRS generally receives the related 1099 form, not the W-9 itself.
How Form W-9 Fits Into Tax Reporting
The process generally works like this:
- A contractor or vendor completes Form W-9.
- The business keeps the W-9 on file.
- The business pays the contractor during the year.
- If reporting requirements are met, the business issues Form 1099-NEC or another applicable information return after year-end.
- The contractor reports the income on their tax return.
This system helps ensure the IRS can match income reported by payers and recipients.
Why Businesses Request Form W-9
Businesses request Form W-9 so they can accurately:
- Verify taxpayer information
- Obtain an SSN or EIN
- Determine the recipient's tax classification
- Prepare required IRS information returns
- Avoid penalties for incorrect reporting
Providing accurate information helps prevent delays, IRS notices, and reporting errors.
What Is a Taxpayer Identification Number (TIN)?
A Taxpayer Identification Number (TIN) is the identifying number used for federal tax purposes.
Common examples include:
- Social Security Number (SSN)
- Employer Identification Number (EIN)
- Individual Taxpayer Identification Number (ITIN), when applicable
The TIN reported on Form W-9 is used by the payer when preparing information returns.
Backup Withholding
In some situations, a payer may be required to withhold federal income tax from payments made to a contractor or vendor. This is known as backup withholding.
Backup withholding may apply if:
- A taxpayer fails to provide a TIN
- The IRS notifies the payer that the TIN is incorrect
- Certain certification requirements are not met
Most taxpayers who properly complete Form W-9 are not subject to backup withholding.
Form W-9 vs. Other Common Tax Forms
It's easy to confuse Form W-9 with several other tax forms, but each serves a different purpose.
Form W-9
- Used by independent contractors, freelancers, and vendors
- Provides taxpayer information to a business
- Not filed with the IRS
Form W-4
- Used by employees
- Tells employers how much tax to withhold from paychecks
Form W-2
- Issued to employees
- Reports wages and tax withholding
Form 1099-NEC
- Issued to independent contractors and certain non-employees
- Reports nonemployee compensation
A simple way to remember the difference is:
W-4 = Employees
W-9 = Independent Contractors and Vendors
Do You Need a W-9 to File Your Tax Return?
Generally, no.
Most taxpayers do not enter Form W-9 information into tax software. The form's purpose is to provide information to the payer, not to report income directly on a tax return.
Instead, taxpayers typically use forms generated from the W-9 information, such as:
- Form 1099-NEC
- Form 1099-MISC
- Other information returns received from payers
Those forms are used when preparing the tax return.
Security Tips for Form W-9
Because Form W-9 includes sensitive personal information, it's important to share it securely.
Consider these best practices:
- Verify the identity of the requester.
- Send the form through secure channels whenever possible.
- Avoid transmitting completed forms over unsecured public networks.
- Keep copies for your records.
Protecting your taxpayer information can help reduce the risk of identity theft and tax fraud.