To find a payer’s federal identification number, start with the form itself: every W-2, 1099, 1098, and K-1 prints the payer’s Taxpayer Identification Number in the upper-left area next to the payer’s name and address. If the form is missing, illegible, or the number looks wrong, a payer’s federal identification number lookup has three reliable free paths: a public database (for nonprofits, public companies, and employers with retirement plans), an IRS Wage and Income Transcript pulled from your online account, or a direct request to the payer.
Check the Form First
The payer’s TIN sits in roughly the same place on every information return. Knowing exactly where saves you from a lookup you don’t need to do.
- Form W-2. The employer’s EIN is in Box b, near the top left, directly above the employer’s name and address.1Internal Revenue Service. 2026 General Instructions for Forms W-2 and W-3
- Form 1099-NEC and 1099-MISC. Look at the unnumbered field labeled “PAYER’S TIN” on the left side, just below the payer’s name, address, and phone number. It will contain either an EIN or an SSN depending on how the payer is structured.2Internal Revenue Service. Instructions for Forms 1099-MISC and 1099-NEC (04/2025)
- Form 1099-R. The payer’s TIN appears in the upper section alongside the payer’s name and address.3Internal Revenue Service. Form 1099-R Distributions From Pensions, Annuities, Retirement or Profit-Sharing Plans, IRAs, Insurance Contracts, etc.
- Form 1098 and 1098-T. The lender’s or school’s TIN is printed in the recipient/filer information area at the top of the form.4Internal Revenue Service. Instructions for Form 10985Internal Revenue Service. Instructions for Forms 1098-E and 1098-T
- Schedule K-1 (Form 1065). The partnership’s EIN is in Item A of Part I, labeled “Information About the Partnership.”6Internal Revenue Service. 2025 Schedule K-1 (Form 1065)
One Trap to Watch For
Your copy of a 1099 may show only the last four digits of your own TIN, with asterisks or Xs replacing the first five. That’s legal: the IRS allows payers to truncate the payee’s TIN on the recipient copy to reduce identity theft risk, and the rule covers SSNs, ITINs, EINs, and adoption TINs across the 1099 series.7Internal Revenue Service. Truncated Taxpayer Identification Numbers The payer cannot truncate their own TIN, though. If the payer’s number is masked on your form, treat that as a form error and ask the payer for a clean copy.
What Kind of Number You’re Actually Looking For
“Federal identification number” is an informal catchall for a Taxpayer Identification Number. For most payers, that means an Employer Identification Number, the nine-digit number the IRS assigns to corporations, partnerships, LLCs, trusts, estates, and nonprofits.8Cornell Law School LII / Legal Information Institute. Employer Identification Number (EIN) A sole proprietor who hasn’t applied for an EIN may use an SSN instead. A payer without eligibility for an SSN may use an ITIN.
A federal identification number is not the same as a state tax ID. Many states issue their own numbers for state tax purposes, and those numbers are different. If you find a number on correspondence from a state agency, confirm it’s the federal EIN before putting it on Form 1040.
Free Public Databases When the Form Is Missing
If you can’t lay hands on the form, three free databases cover a lot of ground. Which one to try depends on what kind of entity paid you.
Nonprofits: IRS Tax Exempt Organization Search
For a nonprofit payer, the fastest option is the IRS Tax Exempt Organization Search at apps.irs.gov/app/eos. You can search by organization name, city, state, or EIN, and results pull from Publication 78 data, auto-revocation lists, determination letters, and filed Form 990 returns.9Internal Revenue Service. Tax Exempt Organization Search ProPublica’s Nonprofit Explorer runs a similar search across Form 990 filings and usually surfaces the EIN in the summary.
Public Companies: SEC EDGAR
Publicly traded companies disclose their EIN in annual reports (Form 10-K) and other SEC filings. Search by company name or ticker in EDGAR’s full-text search, open a 10-K, and the EIN typically appears in the header or company information section near the top.10SEC.gov. EDGAR Full Text Search
Employers with Retirement Plans: DOL Form 5500 Search
Employers that sponsor retirement plans file Form 5500 with the Department of Labor, and those filings are searchable. On the DOL’s EFAST2 search page, switch the search field to “Employer Identification Number” or search by company name. The EIN appears on Part II, Line 2b of the filing.11U.S. Department of Labor. 5500 Search – Help This only reaches employers that sponsor a qualified plan, but many mid-size and large employers do.
Pull an IRS Wage and Income Transcript
This is the option most people skip, and it’s often the easiest. The IRS keeps a record of every information return filed under your Social Security Number, including the payer’s name, EIN, and the amounts reported. The Wage and Income Transcript shows data from your W-2s, 1099s, 1098s, and 5498s.12Internal Revenue Service. Topic No. 159, How to Get a Wage and Income Transcript
The fastest route is your IRS Online Account: sign in, click “Tax Records,” then “Transcripts.”13Internal Revenue Service. Transcript Services for Individuals – FAQs You can also mail Form 4506-T. Transcripts go back ten years. One caveat if you’re filing early: current-year data may not be complete until all payers have filed, so a 1099 submitted close to the January 31 deadline might not appear yet.
Ask the Payer Directly
When the form is missing and databases don’t help, contact the payer. Start with a phone call or email to payroll, HR, or accounting and ask them to reissue the form or provide the EIN. That usually resolves it within a few days.
If it doesn’t, send a written request naming the specific form (W-2, 1099-NEC, and so on) and a date you need it by. Keep a copy, note when you sent it, and use a delivery method that gives you proof of mailing. That paper trail matters if the IRS later asks why the payer’s TIN is missing from your return.
Independent contractors have a bit of leverage. The payer was required to collect your TIN on Form W-9 before paying you, and a failure to do so exposes them to 24% backup withholding on future payments.14Internal Revenue Service. Instructions for the Requester of Form W-9 Mentioning that compliance exposure sometimes moves things faster than a polite ask.
If you still haven’t received a W-2 or 1099 by the end of February, call the IRS at 800-829-1040. Have your name, address, phone number, SSN, and dates of employment ready, along with the payer’s name, address, and phone number. The IRS will contact the payer on your behalf.15Internal Revenue Service. What to Do When a W-2 or Form 1099 Is Missing or Incorrect
If You Still Can’t Get the Number Before the Deadline
You have to file on time whether or not you’ve tracked down the payer’s TIN. Failing to file triggers a penalty that grows every month, entirely separate from any missing-number issue. If you need more time to gather documents, file Form 4868 for an automatic six-month extension to October 15, but estimate your total tax and pay any balance due by April 15 to avoid interest.16Internal Revenue Service. Form 4868, Application for Automatic Extension of Time to File U.S. Individual Income Tax Return
Missing W-2
If your W-2 never arrived and the IRS couldn’t get the employer to send one, use Form 4852 as a substitute. On Line 6, enter the employer’s TIN if you know it; leave it blank if you don’t. Use your final pay stub to estimate wages and withholding on Line 7, and describe on Line 10 what you did to try to get the original. Attach Form 4852 to the back of your return.17Internal Revenue Service. Form 4852, Substitute for Form W-2 or Form 1099-R
Missing 1099
For 1099 income, it’s simpler. You don’t attach the 1099 to your return, and there’s no field on Schedule C or Schedule 1 for the payer’s TIN. Report the income from your own records. The IRS matches on your SSN, so what you report should line up with what the payer filed. If the payer never filed a 1099 at all, you’re still legally required to report the income.