A W-9 is a tax form that tells someone paying you who you are for tax purposes
The W-9 form (officially "Request for Taxpayer Identification Number and Certification") is a document you fill out when someone is about to pay you money and needs to report that payment to the IRS. It's not a tax return — it's a form that collects your name, address, and tax ID number so the payer can file the correct paperwork with the government.
You'll encounter a W-9 most often when you work as an independent contractor, freelancer, or small business owner. The person or company paying you uses the information on your W-9 to create a 1099-NEC form (or 1099-MISC in some cases), which reports your income to the IRS. Without a completed W-9, many payers won't send you money at all — it's a legal requirement for them, not optional.
The form itself is simple: it asks for your name, business name (if you have one), address, tax ID (usually your Social Security number or Employer Identification Number), and your signature. You don't send it to the IRS. You give it to the person or company paying you, and they keep it on file.
Key Takeaways
- A W-9 is required by the payer before they send you money as an independent contractor or freelancer, not by the IRS directly.
- The form contains your name, address, and tax identification number so the payer can report your income on a 1099 form.
- You sign and give the W-9 to the payer; you do not send it to the IRS or include it with your tax return.
- If you don't provide a W-9 when asked, the payer may withhold 24 percent of your payment and send it to the IRS as backup withholding.
Who asks for a W-9 and why
Anyone paying you for work as an independent contractor, freelancer, or vendor will ask for a W-9. This includes small businesses, large corporations, gig platforms, event organizers, and individuals hiring you for a one-time project. They're required by law to collect this form before paying you if the total payment will be $600 or more in a calendar year.
The payer needs your W-9 because they must report non-employee income to the IRS. If they pay you without collecting a W-9, they face penalties. This is why you'll often see a W-9 request before your first payment, even if you've worked with the company before — they need it on file for their records.
Some platforms (like Uber, DoorDash, or Upwork) may ask for a W-9 when you sign up, even if you haven't earned $600 yet. They're preparing in advance because they expect you might reach that threshold.
What information goes on the form
The W-9 has several sections, but most are straightforward. You'll fill in your legal name, current address, and business name if you operate under one. The critical section is your tax identification number — usually your Social Security number if you're a sole proprietor, or an Employer Identification Number (EIN) if you've registered a business with the IRS.
You'll also check a box indicating what type of entity you are: sole proprietor, partnership, S corporation, C corporation, or other. If you're unsure, "sole proprietor" covers most freelancers and independent contractors. The form asks you to certify under penalty of perjury that the information is correct, which is why you must sign it.
You do not need to provide financial information, income history, or details about what work you're doing. The W-9 is purely identification and tax classification.
What happens after you submit your W-9
Once you give your completed W-9 to the payer, they keep it in their files. You don't hear about it again unless something changes — like your address or tax ID. At the end of the year (by January 31), if you were paid $600 or more, the payer will send you a copy of the 1099-NEC form they filed with the IRS. You'll receive this in the mail or electronically, depending on how the payer operates.
You then use that 1099-NEC when you file your own tax return to report your self-employment income. The IRS also receives a copy, so your reported income should match what's on the 1099.
If you were paid less than $600 total in the year, the payer may not be required to send you a 1099, but they still needed the W-9 on file to process your payment legally.
What happens if you don't provide a W-9
If a payer asks for a W-9 and you don't provide one, they cannot legally send you payment. Some will ask repeatedly; others will stop working with you. This is not negotiable — it's a federal requirement, not the payer's choice.
If you do provide a W-9 but the information is incorrect or incomplete, the payer may flag it and ask you to correct it. If the IRS later determines the information was wrong, you could face penalties or have your income reported incorrectly.
In rare cases, if a payer cannot reach you for a W-9 and proceeds anyway, they're required to withhold 24 percent of your payment and send it to the IRS as backup withholding. This money goes toward your tax liability, but it's an inefficient process and can create confusion at tax time.
W-9 vs. W-4: what's the difference
A W-4 form is completely different from a W-9, and it's easy to confuse them. A W-4 is for employees — you fill it out when you start a job to tell your employer how much tax to withhold from your paycheck. A W-9 is for non-employees (contractors, freelancers, vendors) and tells the payer who you are so they can report your income to the IRS.
If you're hired as an employee, you'll fill out a W-4. If you're hired as a contractor, you'll fill out a W-9. You should never fill out both for the same payer in the same year.
Protecting your information on a W-9
A W-9 contains your Social Security number or EIN, so treat it like any sensitive document. Only provide it to legitimate payers you trust. Verify that the person or company asking for it is real — scammers sometimes pose as businesses to collect personal information.
Once you've given your W-9 to a payer, they're responsible for keeping it secure. If you're concerned about how they're storing it, you can ask. If a company experiences a data breach, they're required to notify you.
You can request that a payer destroy your W-9 if you stop working with them, though they may keep it for their records for a set period for tax purposes.
Frequently Asked Questions
Do I need a W-9 if I'm paid less than $600?
The $600 threshold determines whether the payer must send you a 1099-NEC at year-end, but many payers still ask for a W-9 upfront before any payment, regardless of amount. It's safer for them to collect it in advance. You should provide it if asked.
Can I use my Social Security number on a W-9 or do I need an EIN?
Most freelancers and independent contractors use their Social Security number. You only need an EIN if you've registered a business with the IRS (like an LLC or S corporation). If you're self-employed but haven't registered a business, your Social Security number is correct.
What if I made a mistake on my W-9?
Contact the payer immediately and ask them to update their records. Provide a corrected W-9. If the error affects your tax ID, this is especially important because the IRS will match your 1099 to your tax return using that number. Correct it before the payer files their year-end forms.
Do I need to send my W-9 to the IRS?
No. You give your W-9 only to the payer. The IRS never sees it. The payer uses it to create a 1099-NEC, which they file with the IRS. You keep a copy for your records but don't submit it with your tax return.
What if a payer asks for a W-9 but I think I should be classified as an employee?
This is a classification question between you and the payer. If you believe you're misclassified as a contractor when you should be an employee, you can file a Form SS-8 with the IRS to ask them to make a information. In the meantime, if the payer requires a W-9 to pay you, you may need to provide it and address the classification issue separately.