No, a W-9 is not required for every vendor your business pays. You need one only when you expect to make payments the IRS treats as “reportable” — generally $600 or more in a calendar year to a non-employee who isn’t otherwise exempt from information reporting. Vendors selling you physical goods, most corporations, government agencies, and foreign vendors all sit outside the standard W-9 requirement. Getting the line right matters in both directions: the IRS can penalize you for failing to collect a W-9 you needed, and withholding on payments that didn’t call for it creates its own mess.
When You Do Need a W-9
The trigger is reportable payments — amounts you’ll have to document on a 1099 at year’s end. The most common one is paying $600 or more during a calendar year to a single non-employee for services. That threshold is cumulative per vendor across the year. Pay a freelance designer $400 in March and $300 in September and you’ve crossed the line, which means a 1099-NEC and a W-9 on file to prepare it accurately.1Internal Revenue Service. About Form W-9, Request for Taxpayer Identification Number and Certification
The $600 threshold also covers several categories reported on Form 1099-MISC: rent paid to a property owner, prizes and awards, medical and health care payments, crop insurance proceeds, and gross proceeds paid to an attorney. Royalties have a far lower bar at $10.2Internal Revenue Service. About Form 1099-MISC, Miscellaneous Information
One point that catches newer businesses: this entire reporting obligation applies only to payments made in the course of a trade or business. Hire a plumber to fix the sink at your home and no 1099 is required at any amount. Hire the same plumber to fix a pipe at your office for $600 or more and you need the W-9.3Internal Revenue Service. Am I Required to File a Form 1099 or Other Information Return
Collect the W-9 before you cut the first check. You rarely know in January whether a vendor will cross $600 by December, and chasing tax information from someone you haven’t spoken to in months is unpleasant work.
Payments That Don’t Trigger a W-9
The largest category people miss is purchases of merchandise and physical goods. Buy $10,000 of inventory from a supplier and nothing about that payment is reportable on a 1099. No W-9 needed.4Internal Revenue Service. Instructions for Forms 1099-MISC and 1099-NEC The same goes for telephone service, freight, and storage. The IRS is tracking service income, rent, and similar categories, not routine purchases of goods.
Employees are also outside the W-9 system entirely. Employees fill out a Form W-4 and their compensation is reported on a W-2. A W-9 is strictly for independent contractors and other non-employee payees. If you’re unsure whether a worker is an employee or a contractor, settle that classification question before handing them either form.
Payments below the reporting threshold technically don’t require a W-9 either. In practice, many businesses collect one from every service vendor at onboarding anyway, because it’s easier than predicting annual totals.
Payments routed through third-party settlement organizations — payment apps, online marketplaces, and credit card processors — are also outside your 1099-MISC and 1099-NEC reporting. Those organizations handle their own reporting on Form 1099-K when a payee crosses $20,000 in gross payments across more than 200 transactions in a year.5Internal Revenue Service. IRS Issues FAQs on Form 1099-K Threshold Under the One, Big, Beautiful Bill Pay a contractor through a payment app and you don’t also issue a 1099-NEC for the same payment.
Vendors Exempt from 1099 Reporting
Even when payments clear $600, certain entity types are exempt from 1099 reporting, so their W-9 isn’t needed. The biggest exemption covers corporations. Payments to C-corporations and S-corporations, including LLCs that have elected corporate tax treatment, are generally not reportable.4Internal Revenue Service. Instructions for Forms 1099-MISC and 1099-NEC
Two important carve-outs survive the corporate exemption:
- Legal services. Payments of $600 or more to any attorney or law firm are always reportable, whether the firm is a sole practitioner or a large incorporated partnership. Attorney fees go on the 1099-NEC; gross proceeds from settlements go on the 1099-MISC.4Internal Revenue Service. Instructions for Forms 1099-MISC and 1099-NEC
- Medical and health care services. Payments to health care providers are reportable even when the provider operates as a professional corporation.4Internal Revenue Service. Instructions for Forms 1099-MISC and 1099-NEC
Several other entity types are exempt as well. Federal, state, and local government agencies don’t receive 1099s. Tax-exempt organizations recognized under Section 501(a) are exempt from backup withholding. The W-9 itself lists 13 exemption codes covering entities like banks, securities dealers, real estate investment trusts, and registered investment companies.6Internal Revenue Service. Form W-9 (Rev. March 2024)
LLCs Are Not a Shortcut
LLCs cause more W-9 confusion than any other entity, because an LLC’s legal structure and its tax classification are different things. The IRS doesn’t recognize “LLC” as a tax category. Each LLC is taxed as a sole proprietorship (for single-member LLCs), a partnership, a C-corporation, or an S-corporation depending on its election.
A single-member LLC that hasn’t elected corporate treatment is a disregarded entity. On the W-9, the owner’s individual name goes on Line 1, not the LLC’s business name. The LLC name goes on Line 2. The owner provides their own Social Security number or individual TIN, not an EIN obtained for the LLC.6Internal Revenue Service. Form W-9 (Rev. March 2024)
A multi-member LLC taxed as a partnership, or any LLC that has elected C or S-corporation status, checks the “LLC” box on Line 3a and enters the tax classification code: C for C-corporation, S for S-corporation, or P for partnership.6Internal Revenue Service. Form W-9 (Rev. March 2024) That letter matters to you as the payer, because it decides whether the corporate exemption applies. An LLC taxed as a C-corporation is treated like any other corporation and is generally exempt. An LLC taxed as a partnership or disregarded entity is not exempt and still needs a 1099.
When a W-9 comes back from an LLC vendor, check that classification box before concluding you can skip the 1099. A blank Line 3a, or the wrong box, is a problem worth catching now rather than at filing time.
Foreign Vendors Use a Different Form
Foreign vendors don’t use the W-9 at all. When a vendor is not a U.S. person — meaning not a U.S. citizen, resident alien, domestic corporation, or domestic partnership — they provide a form from the W-8 series instead. The W-8BEN is for foreign individuals; the W-8BEN-E is for foreign entities and includes information about their classification under the Foreign Account Tax Compliance Act.7Internal Revenue Service. About Form W-8 BEN, Certificate of Foreign Status of Beneficial Owner for United States Tax Withholding and Reporting (Individuals)
The stakes are higher here because withholding on foreign vendors is mandatory, not a backstop. Under IRC Section 1441, payments of U.S.-source income to a foreign person are subject to a default withholding rate of 30%.8Office of the Law Revision Counsel. 26 U.S. Code 1441 – Withholding of Tax on Nonresident Aliens A vendor can claim a reduced rate or exemption on the W-8 if a tax treaty applies, but without a valid W-8 you withhold the full 30%.
When a Vendor Won’t Give You a W-9
If a domestic vendor you do need a W-9 from refuses to provide one, or provides one with a missing or incorrect taxpayer identification number, you can’t simply skip the 1099. The IRS expects you to begin backup withholding at 24% on all reportable payments to that vendor.9Internal Revenue Service. Topic No. 307, Backup Withholding
Backup withholding is also triggered when the IRS sends you a “B notice” that a TIN doesn’t match their records, or when the IRS notifies you that the vendor has been underreporting interest or dividend income. You continue withholding at 24% until the vendor provides a valid, certified W-9.
Amounts withheld get reported and deposited using Form 945, the annual return for withheld federal income tax from nonpayroll payments. Most businesses deposit monthly; businesses withholding more than $50,000 annually deposit on a semiweekly schedule. If the total is under $2,500 for the year, you can pay it with the Form 945 itself.10Internal Revenue Service. Instructions for Form 945
The vendor isn’t out the money. They claim credit for the withheld amount on their income tax return. But failing to withhold when required can leave your business liable for the tax you should have taken out, plus penalties.
Penalties for Getting It Wrong
The IRS assesses penalties per form for late, incorrect, or missing 1099s. For returns due in 2026, the structure escalates with the delay:11Internal Revenue Service. Information Return Penalties
- Filed within 30 days of the deadline: $60 per form.
- Filed after 30 days but by August 1: $130 per form.
- Filed after August 1, or not filed at all: $340 per form.
- Intentional disregard: $680 per form, with no maximum cap.
The intentional disregard tier is the one to watch. If the IRS concludes you knowingly ignored the filing requirement, which includes systematically failing to collect W-9s from vendors you’re plainly paying for services, the per-form penalty nearly doubles and there’s no ceiling on the total. A business with 50 unreported contractors faces potential exposure of $34,000 at that rate, before any additional accuracy penalties stack on top.