What Is a Payer’s TIN and Where Do You Find It?

A payer’s TIN is the nine-digit Taxpayer Identification Number of the business or person that paid you, and it appears on any tax form they file about those payments. On a W-2 it sits in Box b, labeled “Employer identification number (EIN).” On a 1099-NEC or 1099-MISC, look near the top left of the form in the payer information block, where it’s labeled “PAYER’S TIN.”¹

The IRS uses “TIN” as an umbrella term, so the actual number can take a few different forms depending on who’s doing the paying.

What Kind of Number a Payer’s TIN Actually Is

Three different nine-digit numbers can serve as a payer’s TIN, and which one appears depends on how the payer is organized.²

An Employer Identification Number (EIN) is the most common. Corporations, partnerships, LLCs, nonprofits, trusts, and estates all use EINs, which are formatted XX-XXXXXXX. Any business that pays employees or files information returns typically shows its EIN as the payer’s TIN.³

A Social Security Number (SSN) can serve as the payer’s TIN when the payer is an individual or sole proprietor, such as a landlord paying a contractor. The IRS warns against mixing the two: an EIN shouldn’t be used for personal purposes, and an SSN shouldn’t substitute for business use when an EIN is required.³

An Individual Taxpayer Identification Number (ITIN) covers nonresident and certain resident aliens who aren’t eligible for an SSN but still need to appear on U.S. tax documents. ITINs are nine digits and always start with a 9.⁴

So when you look at a form and see the payer’s TIN, you’re looking at one of these three. The label on the form doesn’t always tell you which; the format usually does.

Payer’s TIN vs. Payee’s TIN

Every information return has two TINs on it. The payer’s TIN identifies the entity that sent the money and filed the form. The payee’s TIN identifies the person or business that received the money. If a company hires a freelance designer, the company’s EIN goes in the payer field, and the designer’s SSN goes in the payee field on the 1099-NEC.

The IRS uses that pairing to cross-check. What the payer reports paying should match what the payee reports earning. When it doesn’t, notices get sent and penalties can follow. Before making a reportable payment, a payer typically collects the payee’s TIN with Form W-9, on which the payee certifies the number is correct.⁵

If the Payer’s TIN on Your Form Is Missing or Wrong

Contact the payer first and ask for a corrected form. If you can’t reach them, or they don’t send a corrected form by the end of February, call the IRS at 800-829-1040 for help.⁶

One quick sanity check for a W-2: the EIN in Box b should match the EIN the employer uses on its payroll tax returns, like Form 941. A mismatch between those two is exactly the kind of thing the IRS flags.¹

When You’re the Payer and Need to Put a TIN on a Return

A payer’s TIN belongs on virtually every information return filed with the IRS. The common ones:

Form W-2 for employee wages, with the employer’s EIN in Box b.
Form 1099-NEC for non-employee compensation. For 2026, this is required when payments to an individual or unincorporated entity reach $2,000 or more in a calendar year, up from the old $600 threshold for tax years beginning after 2025.⁷
Other 1099 variants, including 1099-MISC for rents or royalties and 1099-INT for interest.
Quarterly payroll filings like Form 941. The EIN on your W-2s needs to match the one on your 941s.

How a Business Gets an EIN

Most businesses acting as payers need an EIN, and the IRS issues them for free. The fastest route is the online application at irs.gov, which requires a responsible party’s SSN or ITIN and issues the EIN immediately on approval. Government entities are the only applicants that can use an existing EIN for the online application.⁸

Applicants who can’t use the online tool can fax Form SS-4 and expect the EIN within about four business days, or mail it and wait roughly four weeks.⁹ Every EIN application must name a responsible party: a real person who owns, controls, or manages the entity’s funds. It must be an individual, not another entity, except for government agencies.¹⁰

Individuals who aren’t eligible for an SSN but need a TIN apply for an ITIN using Form W-7, together with supporting identity documentation.⁴

Why the Payee’s TIN Matters Just as Much

Collecting a correct payee TIN isn’t just paperwork hygiene. If a payer can’t get a payee’s TIN, or if the IRS says the TIN doesn’t match its records, the payer has to begin backup withholding at 24% of each payment and send it to the IRS.¹¹ Backup withholding gets reported on Form 945, the annual return for withheld federal income tax from nonpayroll payments.¹²

Filing an information return with a missing or incorrect TIN can also trigger penalties under 26 U.S.C. § 6721, which scale from $60 up to $340 per return depending on how quickly the error is corrected, and reach $680 per return with no annual cap for intentional disregard.¹³

The cleanest way to avoid both problems is to verify payee TINs before filing. The IRS runs a free TIN Matching Program through its e-Services portal, open to payers who file 1099s subject to backup withholding. It supports both interactive checks for individual name-TIN pairs and bulk matching for larger batches, and it covers Forms 1099-B, 1099-DIV, 1099-INT, 1099-K, 1099-MISC, 1099-NEC, 1099-OID, 1099-G, and 1099-PATR.¹⁴

1
Internal Revenue Service. 2026 General Instructions for Forms W-2 and W-3
2
Internal Revenue Service. Taxpayer Identification Numbers
3
Internal Revenue Service. Publication 1635 – Understanding Your EIN
4
Internal Revenue Service. About Form W-7, Application for IRS Individual Taxpayer Identification Number
5
Internal Revenue Service. About Form W-9, Request for Taxpayer Identification Number and Certification
6
Internal Revenue Service. Topic No. 154, Form W-2 and Form 1099-R (What To Do if Incorrect or Not Received)
7
Internal Revenue Service. 2026 Publication 1099
8
Internal Revenue Service. Get an Employer Identification Number
9
Internal Revenue Service. Employer Identification Number
10
Internal Revenue Service. Responsible Parties and Nominees
11
Internal Revenue Service. Understanding Your CP2100 or CP2100A Notice
12
Internal Revenue Service. About Form 945, Annual Return of Withheld Federal Income Tax
13
Internal Revenue Service. Information Return Penalties
14
Internal Revenue Service. Taxpayer Identification Number (TIN) Matching