What Is Form W-9 and When Do You Need One?
A clear explanation of IRS Form W-9: what it is, what it does, and when you're required to fill one out.
- A W-9 is given to the person paying you and is never sent to the IRS.
- You'll need one any time you're paid as a freelancer, contractor, or gig worker.
- It collects your legal name, address, and SSN or EIN.
- If you earn $600 or more from a client, they'll use your W-9 to send you a 1099 at year-end.
If someone just asked you to fill out a W-9, you’re probably wondering what it actually is and why they need it. Here’s everything you need to know.
What a W-9 does
A W-9 is a one-page IRS form called the “Request for Taxpayer Identification Number and Certification.” Its job is simple: you give your legal name, address, and taxpayer ID (your Social Security Number or Employer Identification Number) to whoever is paying you.
The person or business paying you uses that information to:
- Send you a 1099 tax form at the end of the year
- Report what they paid you to the IRS
That’s it. The W-9 itself never gets filed with the IRS. It stays on file with the business that requested it.
When you need to fill one out
You’ll be asked for a W-9 any time you’re paid as an independent contractor rather than an employee. Common situations include:
- Freelance or contract work: A client hires you to design a website, write copy, consult, or complete any project outside of an employment relationship.
- Gig work: Platforms like Upwork, Fiverr, DoorDash, and similar services request W-9 information before they’ll pay you.
- Real estate transactions: Banks and title companies often request W-9s during closings.
- Interest and dividends: Banks, brokerages, and investment platforms may ask for a W-9 when you open an account.
- Prizes and awards: If you win something worth over $600, the organization paying you may request a W-9.
The common thread: whenever someone pays you and they might have to report that payment to the IRS, they need your taxpayer ID. The W-9 is how they get it.
What you’re certifying
When you sign a W-9, you’re confirming three things:
- The taxpayer identification number you provided is correct.
- You are not subject to backup withholding (or if you are, you’ve been notified by the IRS).
- You are a U.S. citizen or other U.S. person for tax purposes.
There’s also a FATCA certification for foreign account reporting, but most freelancers and contractors can ignore it.
Is it safe to fill out a W-9?
Yes, with reasonable care. The W-9 is a standard business document, and requesting one is completely normal. That said, because a W-9 contains your SSN or EIN, you should:
- Only provide it to legitimate businesses you’re actually working with.
- Send it via secure channels (encrypted email, a secure file transfer, or in person) rather than unencrypted plain email if possible.
- Keep a copy for your records.
W-9 fraud is rare but real. If you receive an unsolicited request for a W-9 from someone you don’t recognize, be cautious.
The $600 threshold and 1099s
You’ll often hear about the “$600 rule.” In general, if a business pays you $600 or more in a calendar year, they’re required to report that payment to the IRS and send you a Form 1099-NEC. To do that, they need your W-9 information.
However, businesses often request a W-9 before they’ve paid you anything, so it’s on file in case you cross the $600 threshold. That’s normal practice.
Even if you earn less than $600 from a client, you’re still required to report that income on your tax return. The $600 threshold only determines whether the payer has to report it to the IRS. Your own reporting obligation isn’t affected.
Ready to fill one out?
You can complete your W-9 right now using W9 Helper. It takes about three minutes, and you’ll get a clean PDF ready to send back to whoever requested it.