The IRS W-9 form is a simple but important tax document used to collect your name, address, and taxpayer identification number (TIN). Businesses and clients use it to prepare forms like the 1099-NEC or 1099-MISC when reporting payments to independent contractors, freelancers, and vendors.
If you’re self-employed or do contract work, chances are you’ll be asked to complete a W-9 form.
What Is a W-9 Form?
The IRS W-9 form (Request for Taxpayer Identification Number and Certification) is used to verify your taxpayer information. It’s not filed with the IRS itself—you send it directly to the business or client paying you.
In short:
- A W-9 form provides your name, address, and TIN (usually your Social Security Number or Employer Identification Number).
- It’s most often used for independent contractors, freelancers, or vendors.
- The info on your W-9 is used to create Form 1099, which reports your income to the IRS.
Who Needs to Fill Out a W-9 Form?
You need to complete an IRS W-9 form if:
- You’re an independent contractor or freelancer earning $600+ from a client in a tax year.
- A bank or financial institution requests it to report interest, dividends, or other taxable income.
- You win contest prizes that are subject to taxes.
- You receive real estate proceeds, debt cancellations, or mortgage interest payments that must be reported.
Employees don’t fill out a W-9. They use a W-4 form instead, which tells their employer how much tax to withhold.
How to Fill Out IRS W-9 Form (Step-by-Step)
The W-9 form is short and simple. Here’s how to complete it:
- Line 1 – Name: Enter your full legal name (as shown on your tax return).
- Line 2 – Business Name: If you use a business name or DBA, enter it here.
- Line 3 – Federal Tax Classification: Check the box for your type of business (sole proprietor, LLC, corporation, etc.).
- Line 4 – Exemptions: Most people leave this blank unless exempt from backup withholding.
- Lines 5 & 6 – Address: Enter the mailing address you use on your tax return.
- Line 7 – Account Numbers (optional): Used if the requester asks for one.
- Part I – Taxpayer Identification Number (TIN): Enter your SSN or EIN.
- Part II – Certification: Sign and date to certify the information is correct.
If you don’t have an EIN yet, write “Applied For” in the space and apply online at IRS.gov.
What Happens If You Don’t Provide a W-9?
If you don’t give a client or business your W-9 form, they must withhold 24% of your payments (backup withholding) and send that to the IRS.
You could also face penalties for:
- Giving false information
- Failing to provide your TIN
- Misusing someone else’s W-9 info
W-9 vs. W-4: What’s the Difference?
- W-9 form: Used by independent contractors and freelancers to provide tax info to clients.
- W-4 form: Used by employees to tell their employer how much federal income tax to withhold.
Think of it this way: W-9 = non-employees, W-4 = employees.
FAQs About IRS W-9 Form
1. Is a W-9 form only for self-employed workers?
Mostly yes. Freelancers, independent contractors, and gig workers almost always need to file one.
2. Do I send my W-9 form to the IRS?
No. You give it to the business or client that requested it—not the IRS.
3. What if I don’t have a TIN?
You can apply for one (EIN) on IRS.gov. Until then, write “Applied For” on the W-9.
4. How often do I need to fill out a W-9?
Usually once per client. But if your information changes (name, address, TIN), you’ll need to submit a new one.
5. What’s the penalty for not providing a W-9?
Clients must withhold 24% of your pay until you submit a valid W-9.
