If you do freelance or contract work in the United States, or if you hire independent contractors, you will run into Form W-9 and the related 1099. They sound intimidating but are actually straightforward once you understand who fills out what and why. This guide from The Finance Reveal explains how to fill out a W-9 and how to 1099 someone, part of our Taxes section. This is general education about the US tax system, not tax advice, and forms and rules change, so check the current official instructions or a tax professional.

What the W-9 and 1099 Are For

The W-9 and 1099 work as a pair in the US system for reporting payments to independent contractors. A W-9, the Request for Taxpayer Identification Number and Certification, is a form a business asks a contractor or freelancer to complete, providing their name and taxpayer identification number so the business has the details it needs to report what it pays them. The contractor fills out the W-9 and gives it to the payer; it is not sent to the tax authority.

The 1099, by contrast, is the form the business later issues, sending a copy to the contractor and to the tax authority, to report the total amount it paid that contractor during the year. So the flow is simple: the contractor provides a W-9 up front, and the business uses that information to issue a 1099 after the year ends. This is a routine part of self-employment, closely tied to the tax on self-employment and side income our guide covers.

How to Fill Out a W-9

If you are a contractor asked to complete a W-9, it is quick. The table below outlines what it asks for.

You enter your legal name, and a business or trade name if you have one, then select your federal tax classification, such as individual or sole proprietor, or the type of business entity you are. You provide your address and your taxpayer identification number, which for an individual is usually a Social Security number, or an Employer Identification Number for a business. Finally, you sign and date to certify the information is correct. Because a W-9 contains sensitive details like your taxpayer ID, only provide it to legitimate businesses that genuinely need it to pay you, and send it securely rather than by unprotected email.

How to 1099 Someone

If you are on the other side, a business that paid an independent contractor, “1099ing” them means issuing the appropriate 1099 form to report what you paid. The process starts before you even pay them much: you collect a completed W-9 from each contractor when you begin working with them, so you have their name and taxpayer ID on file. Keeping good records of what you pay each contractor through the year makes the rest easy, the kind of habit our guide to tax record-keeping encourages.

After the year ends, if your payments to a contractor meet the reporting threshold, you prepare a 1099 using the information from their W-9 and your payment records, then provide a copy to the contractor and file with the tax authority by the required deadlines. Many businesses use accounting software or a payroll service to generate and file 1099s, which reduces errors. The essential points are to gather W-9s up front, track payments carefully, and meet the filing deadlines. Because thresholds, deadlines, and the specific 1099 form can change, confirm the current requirements or work with a tax professional. For related basics, see our guide to small business finances, and explore the full Taxes section.

Frequently Asked Questions

How do you fill out a W-9?

Enter your legal name and any business name, select your federal tax classification such as individual or a business entity, provide your address, and enter your taxpayer identification number, usually a Social Security number for an individual or an Employer Identification Number for a business. Then sign and date to certify the information. Give the completed W-9 to the business that requested it, sending it securely.

What is the difference between a W-9 and a 1099?

A W-9 is filled out by a contractor to give a business their name and taxpayer ID, and it is not sent to the tax authority. A 1099 is issued later by the business to report the total it paid that contractor during the year, with copies going to the contractor and the tax authority. In short, the W-9 provides information up front; the 1099 reports payments after the year.

How do I 1099 someone?

Collect a completed W-9 from each contractor when you start working together, and keep records of what you pay them. After year-end, if your payments meet the reporting threshold, use the W-9 details and your records to prepare a 1099, give a copy to the contractor, and file with the tax authority by the deadlines. Many businesses use accounting software or a service to handle this.

Is it safe to send a W-9?

A W-9 is a normal request when a business needs to pay you as a contractor, but it contains sensitive information like your taxpayer ID, so provide it only to legitimate businesses that genuinely need it, and send it securely rather than through unprotected email. Be cautious of unexpected W-9 requests from unknown parties, since scammers sometimes use fake requests to collect personal information.

The Bottom Line

In the US system, the W-9 and 1099 work together to report payments to independent contractors. A contractor fills out a W-9 to give a business their legal name, tax classification, address, and taxpayer identification number, then signs to certify it; the W-9 goes to the business, not the tax authority. Filling one out is quick, but because it contains sensitive details like your taxpayer ID, share it only with legitimate businesses and send it securely. The business, in turn, “1099s” the contractor by using the W-9 information and its payment records to issue a 1099 after year-end, sending copies to the contractor and the tax authority to report the total paid. To do that smoothly, collect W-9s up front when you begin working with each contractor, track payments carefully through the year, and meet the filing deadlines, with many businesses using accounting software or a service to generate and file the forms. Because thresholds, deadlines, and the specific forms can change, confirm the current requirements or consult a tax professional. Understand who fills out what and why, and these forms become a routine part of contracting and self-employment. For related guides, see our articles on tax on side-hustle income, tax record-keeping, and small business finances, and explore the full Taxes section. This article is general information about the US tax system, not personalized tax advice, and forms and rules change, so consult current official instructions or a tax professional.