What is IRS Form W-9 used for?

Form W-9 (Request for Taxpayer Identification Number and Certification) is used by businesses to collect the correct name, address, and Taxpayer Identification Number (SSN or EIN) from independent contractors, freelancers, and vendors for 1099 tax reporting.

Who is required to fill out a W-9 form?

U.S. citizens, resident aliens, and domestic business entities acting as independent contractors, freelancers, or vendors who are paid $600 or more during a calendar year must provide a completed Form W-9 to the requesting business.

What is the difference between Form W-9 and Form W-8BEN?

Form W-9 is for U.S. persons and domestic entities to certify their taxpayer ID number. Form W-8BEN is used by foreign individuals who perform services outside or inside the U.S. to establish foreign tax status and claim treaty benefits.

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Table of Contents

1. What is an IRS Form W-9?

2. When Should You Request or Fill Out Form W-9?

3. Key Lines & Certifications of Form W-9

What is an IRS Form W-9?

IRS Form W-9, officially titled the Request for Taxpayer Identification Number and Certification, is used by businesses to confirm the legal name, tax classification, and Taxpayer Identification Number (TIN) of independent contractors, freelancers, and corporate vendors.

Unlike employee tax forms, Form W-9 is not submitted directly to the IRS. Instead, the requesting business retains the signed W-9 securely on file to ensure accurate year-end Information Returns (such as Form 1099-NEC or Form 1099-MISC).

When Should You Request or Fill Out Form W-9?

Form W-9 is standard procedure across business operations under the following circumstances:

Onboarding Contractors: Businesses collect a signed W-9 before paying any non-employee service provider over $600 in a calendar year.
1099 Tax Preparation: Required to generate accurate 1099-NEC or 1099-MISC filings without incurring IRS backup withholding penalties.
Real Estate Transactions: Used by settlement agents to collect taxpayer details during real estate sales or lease assignments.
Financial Accounts: Financial institutions request Form W-9 when opening business bank accounts or issuing dividend/interest payments.

Key Lines & Certifications of Form W-9

Form W-9 consists of identifying entity lines followed by two formal taxpayer certification parts:

Lines 1 & 2: Entity Identification

Legal individual or entity name matching official tax filings, along with optional DBA or business name.

Line 3: Federal Tax Classification

Designates structure: Sole Proprietor, C Corporation, S Corporation, Partnership, Trust/Estate, or LLC.

Part I: Taxpayer Identification Number

Records either a Social Security Number (SSN) or Employer Identification Number (EIN).

Part II: Certification & Signature

Formal signature under penalty of perjury certifying correct TIN, U.S. citizenship, and backup withholding status.

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What is an IRS Form W-9?

When Should You Request or Fill Out Form W-9?

Key Lines & Certifications of Form W-9

Frequently Asked Questions

Manage Tax Documents & Track Signatures

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