What Is a W-9 Form? When You Need One and How to Fill It Out

A W-9 is an IRS form used to collect your taxpayer identification number (TIN) — usually your Social Security number (SSN) or Employer Identification Number (EIN) — so the business or person paying you can accurately report that income to the IRS. If you’ve ever done freelance work, received interest from a bank, or worked as a contractor, you’ve probably filled one out.

When You’ll Be Asked for a W-9

You typically submit a W-9 when you:

Work as a freelancer, contractor, or self-employed individual for a business that pays you $600 or more in a year
Receive interest or dividends from a bank, broker, or investment account
Win prize money or participate in certain promotions
Receive rent payments as a landlord from a business tenant
Receive proceeds from real estate transactions

What’s on a W-9?

The form is one page and fairly simple. It asks for:

Name: Your legal name (or business name if applicable)
Business name/DBA: If your business has a different name than your own
Federal tax classification: Individual/sole proprietor, C Corp, S Corp, Partnership, Trust, LLC, or other
Address
Taxpayer Identification Number (TIN): Either your SSN or EIN
Signature and date
Exemption codes: Most individuals leave this blank — it applies to certain tax-exempt entities

W-9 vs. W-4 vs. 1099

W-4: Filled out when you start a job as an employee. It tells your employer how much income tax to withhold from your paycheck.
W-9: Filled out when you work as a contractor or in other non-employee situations. No withholding — the payer just collects your information.
1099: A tax form the payer sends to you (and the IRS) at year-end, reporting how much they paid you. The W-9 is how they get your information to fill out the 1099.

Backup Withholding

The W-9 form includes a certification that you’re not subject to “backup withholding.” Backup withholding is when the payer withholds 24% of your payment and sends it to the IRS. This happens if you’ve given an incorrect TIN in the past or if the IRS has notified you that you’re subject to backup withholding. Most people are not subject to it — you simply certify that by signing the W-9.

Is It Safe to Fill Out a W-9?

Yes, when submitted to a legitimate business. Your SSN is sensitive information, but businesses that request W-9s are legally required to keep the information confidential — they can face penalties for misuse. That said, be cautious about who you give your SSN to. A W-9 should only be submitted to a real, established business that you have a genuine work or financial relationship with.

FAQ

Do I have to fill out a W-9? If a business asks for one and you want to get paid or receive your financial account information, yes. Refusing may mean backup withholding is applied to your payments.
Where do I get a W-9? Download the current version directly from IRS.gov (search “W-9”). Don’t use an outdated copy — the form is occasionally updated.
Do I send the W-9 to the IRS? No. You give it to the requester — the business or person paying you. They use it to prepare your 1099 and submit that to the IRS.
What if I have an EIN instead of an SSN? You can use your EIN as your TIN. Many sole proprietors and LLCs prefer to use an EIN to avoid sharing their SSN with clients.
Do employees fill out W-9s? No — employees fill out W-4s. W-9s are for contractors, freelancers, and non-employee payees.

Final Thought

A W-9 is a simple but important form — it’s how the IRS ensures that income paid to contractors and non-employees gets properly tracked and reported. If you do any freelance work, contracting, or receive investment income, you’ll encounter it often. Fill it out accurately, protect your SSN, and remember that the 1099 you receive at year-end comes directly from the information you provided on the W-9.

When You’ll Be Asked for a W-9

What’s on a W-9?

W-9 vs. W-4 vs. 1099

Backup Withholding

Is It Safe to Fill Out a W-9?

FAQ

Final Thought

Further Reading