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What is Form W-9?
Form W-9 (Request for Taxpayer Identification Number and Certification) is a U.S. tax document used to provide your taxpayer identification number (TIN, SSN, or EIN) to a payer based in the United States.
It is typically requested by a U.S. client, bank, or platform before any payment, so that the payer can issue the correct tax filings (1099, 1098, etc.) to the IRS.
The W-9 stays between you and the payer — it is not sent to the IRS. Keep a copy for your records.
When should you fill out a W-9?
Use this document if:
- You're a freelancer or consultant paid by a U.S. company
- You're opening a bank or brokerage account in the United States
- You receive dividends, interest, or royalties from a U.S. source
- You own a U.S. LLC and a client requests it
- You provide services to a U.S. platform (marketplace, SaaS, etc.)
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IRS Form W-9 to fill out and sign online
Form W-9 is used by U.S. taxpayers to provide their taxpayer identification number to a payer. It is essential to allow the payer to issue the 1099 or 1098 filings required by the IRS and to avoid a mandatory 24% backup withholding.
Our editor lets you fill out the W-9 online error-free: name, business name, tax classification (sole proprietor, LLC, S-corp, partnership, etc.), address, TIN/SSN/EIN, FATCA exemptions, and signature. The document is generated instantly as a PDF.
Keep your W-9 in a secure place and share it only with legitimate requesters. Update the form whenever your name, status, or tax number changes to stay compliant with IRS requirements.
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