EIN Lookup: Find a Company's EIN or Your Own (Free)

Whether you're a business owner who's misplaced your own tax ID or an administrator needing to verify a vendor's information, the "EIN lookup" is a common and crucial task. A Federal Employer Identification Number (FEIN or EIN) is a unique nine-digit number assigned by the IRS to identify a business entity.

But finding one isn't always straightforward. The method you use depends entirely on one simple question: are you looking for your own EIN or someone else's? This guide provides a clear, step-by-step process for both scenarios.

Part 1: How to Find Another Company's EIN

When you need to perform a federal tax id number lookup on another company, your success depends on whether the company is public, private, or non-profit.

1. For Publicly Traded Companies (The Easy Way)If the company is publicly traded on the stock market, its EIN is considered public information.

• Method: Use the SEC's EDGAR (Electronic Data Gathering, Analysis, and Retrieval) system. Search for the company's name, and its EIN will be listed on its official filings (like a 10-K or 10-Q report). This is the most reliable EIN lookup free tool for public corporations.

2. For Non-Profit OrganizationsNon-profits are also required to make their information public to maintain their tax-exempt status.

• Method: Use the IRS Tax Exempt Organization Search tool. You can search by name and location to find details and filings. The organization's EIN will be on its Form 990, which is publicly available.

3. For Private Companies (The Hard Way)Finding the EIN for a private company is difficult, as it's not public record. You cannot simply look it up online.

• Method: The most professional way is to ask the company directly. Request a Form W-9, "Request for Taxpayer Identification Number and Certification," from their billing or accounts payable department. This form officially provides their EIN and is standard practice for vendor and contractor payments.

Part 2: How to Find Your Own Lost EIN

Misplacing your own company's EIN is incredibly common. Before you spend hours on the phone, follow these steps to check EIN number using documents you likely already have.

1. Check Your Business DocumentsYour EIN is printed on numerous documents. This is the fastest and easiest way to find it.

• Original EIN Confirmation Letter: The original SS-4 confirmation letter you received from the IRS when you first applied.
• Previous Tax Returns: Your EIN is on all federal tax returns you've filed for the business.
• Business Bank Account Statements: Most banks require an EIN to open a business account and may list it on your statements or in your online banking portal.
• Business Licenses and Permits: Check local, state, or federal license and permit applications.

2. Call the IRS (The Last Resort)

If you've exhausted the options above, you can call the IRS Business & Specialty Tax Line.

How: Call them at 1-800-829-4933, available from 7 a.m. to 7 p.m. local time, Monday through Friday.

Be Prepared: You must be an authorized person (e.g., a corporate officer, partner, or sole proprietor) to receive this information. They will ask you security questions to verify your identity before providing the number over the phone.

Don't Get Stuck on Paperwork

Whether you're verifying a vendor or trying to track down your own records, a FEIN lookup doesn't have to be a roadblock. By knowing whether to check public records, ask for a W-9, or simply review your own documents, you can find the number you need quickly and efficiently.

Bookmark this guide for the next time you need to find an EIN. It will save you time and point you in the right direction every time.

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