When Is a W-9 Required From a Vendor? Rules and Exemptions

Key takeaways

• Collect a W-9 from every vendor before their first payment to keep their legal tax details on file.
• Request one from independent contractors, freelancers, and attorneys, but not from corporations, employees, or foreign vendors.
• Confirm the 1099 reporting threshold, which is $600 through 2025 and rises to $2,000 in 2026.
• Apply 24% backup withholding if a vendor refuses, and keep completed forms on file for four years.

That stack of vendor invoices on your desk represents more than just money owed. Buried in there somewhere is a question you might not have thought to ask: do you actually have a W-9 on file for each of these people?

Most business owners don’t think about it until January hits and they’re suddenly scrambling to file 1099s. By then, half those contractors have moved on to other projects, changed email addresses, or simply stopped responding to requests that aren’t attached to a paycheck. Getting clear on when you actually need a W-9 (and when you can skip asking altogether) saves real headaches when tax deadlines loom.

What is a W-9 form?

A W-9 form is an IRS document used by U.S. individuals and entities to provide their correct name, address, and Taxpayer Identification Number (TIN) to a person or entity (a “requester”) who is required to file an information return with the IRS.

A W-9 captures many things, including a vendor’s taxpayer identification number. Could be their Social Security number, could be an Employer Identification Number. You need this to prepare Form 1099-NEC, which tells the IRS how much you paid non-employees throughout the year.

Here’s something that trips people up: the W-9 never goes to the IRS. It stays in your files as a reference document. When January rolls around and you’re completing 1099s for anyone you paid $600 or more, that W-9 provides the identification number that makes the whole thing work.

The form also captures the vendor’s legal name, business address, and federal tax classification. That last piece matters because it tells you whether this vendor needs a 1099 at all. A sole proprietor? Yes. An S-corp? Usually no. The W-9 spells it out.

When should you request a W-9 form?

Request a W-9 before you make the first payment to a vendor. Timing it right saves you from chasing forms at year-end.

Who needs to provide a W-9 form?

Not every vendor requires one. Understanding which relationships trigger the requirement saves you from unnecessary paperwork requests.

How to request a W-9 from a vendor

Requesting a W-9 is simple when you build it into how you bring on new vendors. Follow these steps to collect the form without the year-end scramble.

1. Send the vendor a blank W-9 from the IRS website along with your contract.

2. Explain why you need it and how you will store their information.

3. Make a completed W-9 a condition of starting work.

4. Save the finished form in that vendor’s file so it is ready at tax time.

When is a W-9 not required?

Some vendor relationships don’t trigger any W-9 requirement. Knowing when you can skip asking keeps your administrative load manageable.

Do you need a W-9 from every vendor?

No, you do not need a W-9 from every vendor. You usually don’t need a W-9 from corporations, tax-exempt organizations, or when payments to a vendor are under $600.

That said, plenty of business owners collect W-9s from new vendors regardless of expected payment amounts. A project that starts at $400 can easily grow. A one-time purchase might turn into a recurring service relationship. Having the W-9 already on file saves you from scrambling later if the numbers shift.

Do nonprofits need to collect W-9 forms?

Yes, nonprofits must collect W-9 Forms from U.S. persons, independent contractors, vendors, and other entities to whom they pay $600 or more annually for services, rent, or other reportable payments, ensuring proper 1099 reporting and compliance with IRS requirements.

This catches some nonprofit administrators off guard. Tax-exempt status means your organization doesn’t pay income tax on its own revenue. It doesn’t mean you can skip the paperwork that reports payments going out to others.

What happens when a vendor doesn’t provide a W-9?

If a vendor won’t provide a W-9, you must start 24% backup withholding on their payments. Skip it and the IRS can penalize you.

This situation comes up more often than you’d think. You send the request, wait a week, send a reminder, wait another week. Still nothing.

First, keep trying. A friendly follow-up often does the trick. Some contractors aren’t ignoring you on purpose. Your email just got buried under everything else. A phone call can move things along when emails aren’t working.

If the vendor keeps ignoring your requests and you still need to pay them, backup withholding kicks in. Because you don’t have a valid taxpayer identification number on file, the IRS requires these steps:

• Withhold 24% of the payment.

• Remit the withheld amount to the IRS.

• Report it on Form 945.

• Issue a 1099 showing the gross payment and the amount withheld.

That’s extra paperwork for you and less money for the vendor. Nobody wins. The vendor can claim the withheld amount as a credit on their tax return, but they’d rather just have their full payment. This is exactly why collecting W-9s before that first payment makes so much sense. Once money has changed hands, your leverage disappears.

How long should you keep W-9 forms on file?

The IRS can audit your business tax returns going back several years, so your W-9 documentation needs to stick around for a while.

The general rule is to keep completed W-9s for at least four years after you file the tax return that includes the related 1099 information. Paid a contractor in 2025? You’ll file their 1099 in early 2026, then file your business tax return sometime in 2026. Hold onto that W-9 until at least 2030.

A quick example: hiring a freelance designer

Say you bring on a freelance designer for a website refresh project. The quote comes in at $4,500. Here’s how the W-9 process should work:

Before any work starts, you send a W-9 request along with your contract. The designer fills it out, indicating they’re a sole proprietor, and returns it. You save the completed form in their vendor file.

Work happens. Invoices come in. You pay them throughout the project.

Come January, you pull up your records. The designer received $4,500 from you during the calendar year. That’s well above the $600 threshold. You use the W-9 information to prepare their 1099-NEC, file it with the IRS, and send them a copy.

The whole thing takes minutes because you collected the W-9 upfront. No chasing, no delays, no backup withholding complications.

Simplify W-9 collection and 1099 filing with Melio

Melio builds W-9 requests into your payment flow, so forms are collected at onboarding and 1099 data is ready at year-end without manual reconciliation.

Melio weaves W-9 requests into your payment process. Send requests electronically. Track submissions through your dashboard. The integration with Tax1099 means payment data flows directly into 1099 preparation without spreadsheets to reconcile or data entry mistakes to fix.

Managing W-9s and 1099s in the same place where you handle payments keeps contractor relationships organized. Records stay current. Tax deadlines become manageable instead of stressful.

The platform works whether you pay a handful of vendors or manage a large contractor base. The mobile app and desktop version both handle bill payments and tax compliance together, keeping paperwork from eating into time you’d rather spend elsewhere.

W-9 vendor FAQs