TIN Matching

TIN Matching is a pre-filing service in IRS e-Services that lets an authorized payer confirm a payee’s name and taxpayer identification number combination matches IRS records before the payer files an information return. The IRS describes it as “a pre-filing service only offered to payers and/or their authorized agents who submit information returns.” Getting the name and TIN right before filing is what keeps a 1099 clean and keeps the payer out of the backup withholding correction cycle.

How TIN Matching Works

A payer who is enrolled in IRS e-Services and listed on the IRS Payer Account File submits a payee’s name and TIN and receives a match indicator showing whether the pair matches IRS records. The IRS offers two methods:

1. Interactive matching. The payer keys in up to 25 name and TIN combinations and gets an on-screen response.
2. Bulk matching. The payer uploads a file of up to 100,000 combinations and gets results back, generally within 24 hours.

The check covers payees on the information returns subject to backup withholding, including Forms 1099-INT, 1099-DIV, 1099-MISC, 1099-NEC, 1099-B, 1099-K, and 1099-PATR.

Why It Matters: Backup Withholding and CP2100

TIN Matching exists to head off backup withholding. The IRS states a payer “is required to withhold at the current rate of 24 percent” when a payee “failed to provide a correct taxpayer identification number (TIN) to the payer for reporting on the required information return,” per the IRS backup withholding page.

When a filed return carries a missing or mismatched name and TIN, the IRS sends the payer a CP2100 or CP2100A notice. Per the IRS, “We issue a CP2100 when the payer has filed 50 or more incorrect information returns with errors. We issue a CP2100A when the payer has filed less than 50 information returns with errors,” on the IRS CP2100 page. The notice means “the payee’s name and taxpayer identification number (TIN) on your information return is missing or doesn’t match our records.”

A CP2100 or CP2100A can require the payer to send a B-notice. The First B-notice and a Form W-9 go to a payee the first time the payee appears on such a notice, and the Second B-notice follows if the same payee appears again within a three-year period, per IRS Publication 1281. Confirming the name and TIN with TIN Matching before filing is how a payer avoids landing in this loop.

When to Use It

• Before filing season. Match every payee’s W-9 data against IRS records before issuing 1099s, so mismatches are fixed while there is still time to re-solicit a correct TIN.
• At onboarding. Match a new vendor or US contractor when the W-9 is collected, not after a return is filed.
• After a name change. A payee who changes a business or legal name without updating IRS records is a common mismatch source. Matching catches it early.

What It Does Not Do

• It is not a substitute for collecting a Form W-9. The W-9 is still how a payer obtains the certified name and TIN.
• It only confirms a name and TIN combination against IRS records. It does not validate address, classification, or whether backup withholding already applies.
• It is for US payees on backup-withholding information returns. Foreign payees are documented on a W-8 series form and reported on Form 1042-S, outside this program.

Related Terms

• Taxpayer Identification Number: the identifier TIN Matching validates.
• Backup Withholding: the 24 percent withholding TIN Matching helps a payer avoid.
• Information Return: the filings, such as the 1099 series, that the program supports.

Omnivoo Contract Management collects each US contractor’s W-9 at onboarding and keeps the certified name and TIN on file, so the data on every information return matches what the payer reports to the IRS.