Glossary term
Form W-9 - Taxpayer Identification Number Certification
Form W-9 is an IRS form used to collect a U.S. person's taxpayer identification number and certification for information reporting.
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What Is Form W-9?
Form W-9 is an IRS form used to request a U.S. person's taxpayer identification number and certification. Businesses, platforms, financial institutions, and other payers use it to collect the information they need for tax reporting.
The form is usually given to the requester, not filed directly with the IRS by the person completing it. The requester may later use the information to prepare a Form 1099 or other information return.
Key Takeaways
- Form W-9 collects a taxpayer identification number, such as an SSN or EIN.
- It is generally used by U.S. persons, not foreign persons.
- Requesters use W-9 information to prepare information returns.
- An incorrect or missing W-9 can lead to backup withholding or payment delays.
- The form contains sensitive identity information and should be handled carefully.
How Form W-9 Works
A payer asks a person or business to complete Form W-9 before making reportable payments or opening certain financial relationships. The form identifies the payee's name, business name if applicable, federal tax classification, address, and taxpayer identification number.
The signer also certifies that the taxpayer identification number is correct and that the person is not subject to backup withholding, unless that certification is modified. The requester keeps the form for records and information reporting.
W-9 Versus Related Forms
Form | Common User | Main Purpose |
|---|---|---|
Form W-9 | U.S. persons and businesses | Provide TIN and certification to a requester |
Form W-4 | Employees | Set paycheck withholding |
Form W-8 | Foreign persons or entities | Certify foreign status and withholding treatment |
Form 1099 | Payers | Report certain payments to the IRS and recipient |
Where It Shows Up
Form W-9 commonly appears when someone starts freelance work, receives contractor payments, opens a brokerage or bank relationship, earns certain royalties, receives rent, or provides services to a business that must report payments.
For small businesses, collecting W-9 forms early can prevent year-end reporting problems. If a contractor waits until tax season to provide a taxpayer identification number, the business may have trouble preparing accurate information returns.
What to Watch
A W-9 contains sensitive information, including a Social Security number or employer identification number. It should be provided only to legitimate requesters through secure channels.
Completing a W-9 does not make someone an employee. Worker classification depends on the actual relationship and applicable law. A W-9 is mainly a tax-reporting document for payee information.
For independent contractors, the W-9 often comes before payment begins. It helps the business match the payment to the right legal name and TIN, which reduces mismatch notices and correction work later.
The Bottom Line
Form W-9 gives a requester the taxpayer information needed for U.S. information reporting. It is simple but important: errors, missing forms, or insecure handling can create tax-reporting problems, backup withholding, or identity-risk concerns.