IRS Form W-9: Request for Taxpayer Identification Number and Certification
Form W-9 is a request from a business or client for your correct taxpayer identification number, such as your Social Security number or EIN. You give it to the person who asked, not to the IRS. They use it to file information returns like Form 1099-NEC that report what they paid you.
What this form is for
It collects your name, tax classification and taxpayer identification number, and includes your certification that the number is correct.
When people usually use it
Freelancers and contractors fill it out before getting paid by a new client. Banks and brokers may also ask for it when opening an account.
What to have ready
- Your Social Security number or EIN
- Your legal name and business name, if any
- Your current mailing address
Related forms
- Form 1099-NEC: Nonemployee Compensation
- Form 1099-K: Payment Card and Third Party Network Transactions
- Form SS-4: Application for Employer Identification Number (EIN)
Read the IRS page
IRS.gov page for Form W-9 (opens in a new tab). The IRS page is the final word on this form.
Frequently asked questions
What is IRS Form W-9?
Form W-9 is a request from a business or client for your correct taxpayer identification number, such as your Social Security number or EIN. You give it to the person who asked, not to the IRS. They use it to file information returns like Form 1099-NEC that report what they paid you.
Where do I get Form W-9?
Get it from IRS.gov. The IRS page for Form W-9, https://www.irs.gov/forms-pubs/about-form-w-9, has the latest revision, the instructions and any recent changes.
Do I need to file Form W-9?
That depends on your own facts. The instructions on IRS.gov explain who uses Form W-9, and any IRS letter you got may say what it needs from you. This is not tax advice.
What should I have ready for Form W-9?
Gather: your social security number or ein; your legal name and business name, if any; your current mailing address. The instructions on IRS.gov list everything the form asks for.
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