Yes, you need a W-9 from anyone you might have to issue a 1099 to. The W-9 is where you capture the payee’s legal name, taxpayer identification number, and tax classification, and every one of those fields lands directly on the 1099 you file at year-end. Collect it before you cut the first check, not after payments start adding up, because a missing or refused W-9 forces you into 24% backup withholding and can leave your business on the hook for tax the contractor should have paid.1Office of the Law Revision Counsel. 26 USC 3406 – Backup Withholding Starting with tax year 2026, the 1099-NEC and 1099-MISC reporting threshold rises from $600 to $2,000 per payee for the year,2Internal Revenue Service. Form 1099 NEC and Independent Contractors but the smart move is still to gather a W-9 up front, because you often won’t know who will cross that line until the year is over.
How the W-9 Feeds Into the 1099
The W-9 never goes to the IRS. It stays in your files as the certified record of who you paid and how they’re classified for tax purposes.3Internal Revenue Service. Form W-9 (Rev. March 2024) When the year closes, you pull the payee’s legal name, address, and TIN off the W-9 and copy that information onto the 1099. The 1099 is the actual information return that goes to both the IRS and the payee.
The system exists so the IRS can match income the payee reports on their own return against what payers reported about them. When the numbers align, nothing happens. When they don’t, the IRS sends the payer a CP2100 or CP2100A notice flagging the mismatch and potentially requiring backup withholding on future payments to that payee.4Internal Revenue Service. Backup Withholding B Program Those notices are almost entirely avoidable by getting the W-9 right at the start.
The W-9 asks for the payee’s legal name exactly as it appears on their federal tax return, any trade or DBA name, a current mailing address, and the TIN. Individuals typically give a Social Security Number; entities use an Employer Identification Number. Federal law requires payees to furnish that number to anyone obligated to file an information return about them.5Office of the Law Revision Counsel. 26 USC 6109 – Identifying Numbers The payee also selects their federal tax classification (individual, partnership, C-corp, S-corp, LLC, other) and signs under penalties of perjury certifying the information is correct and indicating whether they’re subject to backup withholding.3Internal Revenue Service. Form W-9 (Rev. March 2024) That signature is your protection if the number turns out to be wrong. Always pull the current version of the form from irs.gov, since the IRS revises it periodically.
Who You Should Collect a W-9 From
Independent contractors, sole proprietors, and most LLCs should hand over a completed W-9 whenever you request one. These are the payees most likely to trigger a 1099 filing obligation, and the W-9 is how you confirm identity and tax status before the money starts moving.
Corporations are the major exception. Payments to C-corporations and S-corporations for services generally don’t require a 1099-NEC or 1099-MISC. The word “generally” matters. Payments to any corporation for legal services still have to be reported, either as attorney fees on the 1099-NEC or as gross proceeds on the 1099-MISC.6Internal Revenue Service. Instructions for Forms 1099-MISC and 1099-NEC (04/2025) Many businesses ask every vendor for a W-9 regardless of entity type, which is sound practice. The tax classification box lets you confirm who actually qualifies for the corporate exemption instead of taking someone’s word for it.
Foreign Payees Use a Different Form
The W-9 is only for U.S. persons. If you’re paying a nonresident alien or foreign entity, the correct form is a W-8. Individual foreign contractors typically provide Form W-8BEN to establish non-U.S. status and claim any applicable treaty benefits;7Internal Revenue Service. Instructions for Form W-8BEN foreign entities use Form W-8BEN-E. If someone hands you a W-9 but you have reason to believe they’re not a U.S. person, sort out their status before paying them. The withholding rules for foreign payees are completely different and far more aggressive than domestic backup withholding.
What Happens If You Don’t Collect a W-9
If a payee refuses to give you a W-9 or provides an obviously wrong TIN, you can’t just file the 1099 blank and move on. Federal law requires you to withhold 24% of every payment and send it to the IRS.1Office of the Law Revision Counsel. 26 USC 3406 – Backup Withholding This backup withholding kicks in when a payee fails to furnish a TIN, when the IRS tells you the TIN is incorrect, when the IRS notifies you the payee has been underreporting income, or when the payee fails to certify they aren’t subject to backup withholding.
The 24% comes out of the contractor’s check, not yours. But here is the catch. If you were supposed to withhold and didn’t, you become liable for the uncollected amount, meaning your business could end up paying the 24% out of its own funds. Most contractors produce a W-9 quickly once they learn the alternative is losing nearly a quarter of every payment.
Backup withholding can also start after the fact. Once the IRS sends you a CP2100 notice about a mismatched name-and-TIN combination on a 1099 you already filed, you have to begin withholding on future payments until the payee resolves the discrepancy with the IRS and gives you a corrected W-9.8Internal Revenue Service. IRS Sends CP2100 and 2100A Notices When Payers Need to Correct Backup Withholding Errors
On top of the withholding exposure, filing a 1099 with wrong or missing information carries per-return penalties that scale with how late the correction happens, running as high as $340 per return, or $680 per return with no annual cap in cases of intentional disregard.9Internal Revenue Service. Information Return Penalties For a business with dozens of contractors, that math turns bad fast.
When a 1099 Is Actually Required
You only need to file a 1099-NEC or 1099-MISC once total payments to a single payee reach the reporting threshold for the year. For tax year 2026, that floor is $2,000, up from the longstanding $600, with inflation adjustments starting in 2027 under the One Big Beautiful Bill Act.2Internal Revenue Service. Form 1099 NEC and Independent Contractors If the total stays under $2,000 for the calendar year, no 1099-NEC is required for that payee.
The threshold is cumulative across the year, not per payment. Ten $200 payments trigger the filing requirement the same way one $2,000 payment does. Waiting to see whether payments cross the line is how businesses end up chasing contractors for a W-9 in January, when the contractor has no reason left to cooperate.
A few 1099-MISC categories still use lower thresholds. Royalties and substitute dividends reported in lieu of tax-exempt interest are reportable at $10, and gross proceeds paid to attorneys remain reportable at $600.10Internal Revenue Service. Instructions for Forms 1099-MISC and 1099-NEC (Rev. April 2025) Don’t assume every 1099-MISC payment falls under the new $2,000 floor.
Verify TINs Before You File
A mismatched name-and-TIN combination on a 1099 doesn’t just risk a CP2100 notice; it can also gum up the payee’s own tax return. The IRS offers a free TIN Matching service that lets payers validate name-and-number combinations before information returns go out, either one at a time or in bulk.11Internal Revenue Service. Taxpayer Identification Number (TIN) Matching You have to register on the IRS Payer Account File database and complete an application first; the service is only available to payers and their authorized agents who actually file information returns. For any business filing more than a handful of 1099s, running payee data through TIN Matching before year-end catches typos and transposition errors that would otherwise become penalty notices months later.