EIN Lookup: How to Find, Verify, and Use Your Business Tax ID

An EIN lookup is the process of finding your business's nine-digit Employer Identification Number (formatted 12-3456789) — the federal tax ID the IRS assigns to your company. The fastest way to recover a lost EIN is to check your original IRS confirmation letter (CP 575) or any filed business tax return; if those are gone, call the IRS Business & Specialty Tax Line at 800-829-4933 (Mon-Fri, 7am-7pm local time), verify you are an authorized officer, and they will read your number back to you over the phone. For someone else's EIN, you use public sources like SEC filings, state business registries, or a tax-exempt organization search — private EINs are not published in one central directory.

Below, we cover every retrieval method in order of speed, how to verify an EIN belongs to a legitimate business, and why the number matters the moment you apply for working capital.

What an EIN Is (and Isn't)

An EIN, also called a Federal Tax Identification Number, is issued by the IRS to identify a business entity for tax and payroll purposes. Think of it as a Social Security number for your company. You need one to hire employees, open a business bank account, file business taxes, apply for most licenses, and — critically for owners chasing growth capital — to apply for nearly any form of business financing.

A few things an EIN is not:

• It is not a business license or proof you are registered with your state. Those are separate.
• It is not confidential the way an SSN is. EINs appear on W-2s, 1099s, and many public filings, so they should be protected but are not treated as high-secrecy.
• It does not expire and is never reused — once the IRS assigns your number, it is permanently tied to that entity, even if you close the business.

One EIN belongs to one entity. If you own three LLCs, you generally have three EINs. Sole proprietors with no employees can use their SSN instead, but most open an EIN anyway to keep business and personal identity separate.

How to Find Your Own EIN — 6 Methods, Fastest First

If you lost or forgot your number, work down this list. Most owners recover it in under ten minutes without ever calling the IRS.

1. Your IRS confirmation letter (CP 575). This is the notice the IRS mailed (or displayed online) when your EIN was first issued. Your number is printed at the top. This is the single cleanest source.
2. Any prior business tax return. Your EIN is at the top of every 1120, 1120-S, 1065, or Schedule C you have filed. Pull last year's return.
3. Your business bank account paperwork. The bank required your EIN to open the account, so it is on your application file — a quick call to the branch or a look at online banking business profile often surfaces it.
4. Old payroll or 1099/W-2 forms. Any form your business issued shows your EIN in the payer/employer box.
5. Prior loan, lease, or license applications. Business credit card statements, equipment leases, and state license filings frequently carry the number.
6. Call the IRS Business & Specialty Tax Line: 800-829-4933. When the other five fail, an authorized person (owner, partner, corporate officer, or sole proprietor) can verify identity and have the agent read the EIN aloud. They will not email or fax it to you for security reasons.

How to Look Up Another Company's EIN

There is no free public master database of every U.S. EIN — private companies' numbers are not centrally published. But depending on the entity type, you have real options:

• Public companies: Search the SEC's EDGAR system. The EIN (labeled 'IRS No.') appears on 10-K, 10-Q, and other filings.
• Nonprofits and tax-exempt orgs: Use the IRS Tax Exempt Organization Search, or GuideStar/Candid. Nonprofit EINs are public by design and appear on Form 990.
• Any registered business: Check the Secretary of State business entity search for the state of registration. Some states list the EIN; many list the entity but not the number.
• Vendor/partner relationships: If you need a company's EIN to issue a 1099, request a completed Form W-9 directly from them. This is the correct, standard channel.
• Paid business-credit services: Dun & Bradstreet and similar databases may carry EINs, usually behind a subscription.

Be cautious with 'free EIN lookup' websites promising any company's number instantly — many are lead-capture pages or scrapers with stale data. For a legitimate need, the W-9 request or the official government source is both faster and accurate.

Verifying an EIN Is Legitimate

Whether you are onboarding a vendor or a lender is reviewing you, EIN verification checks that the number matches the legal business name the IRS has on file. Practical ways to confirm:

• IRS TIN Matching (for payers): Businesses that file information returns can enroll in the IRS TIN Matching program through e-Services to confirm a name/EIN pair before filing 1099s — this prevents backup-withholding penalties.
• Form W-9 on file: A signed W-9 is the vendor certifying their own name and EIN under penalty of perjury.
• Cross-check the name/EIN: The legal entity name on the EIN must match the name on your bank account and formation documents. Mismatches are the single most common reason a funding file stalls.

The number 3, 7, 8, and other lead digits used to signal the IRS campus that issued the EIN, but the IRS stopped tying prefixes to geography years ago — do not use the prefix to judge legitimacy.

Why Lenders and Funders Ask for Your EIN

The moment you apply for working capital, your EIN does three jobs at once. It identifies the legal entity that will be responsible for repayment, it lets the funder pull business credit and public records tied to that entity, and it confirms the name on your bank statements matches the entity applying. When those three line up, the file moves. When they don't — say, statements read 'John's Auto LLC' but the EIN is registered to 'JS Automotive Group Inc' — underwriting pauses until the discrepancy is explained.

Here is the underwriter's reality most owners don't hear: for revenue-based financing, your EIN is a gatekeeping detail, not the decision. Traditional bank lending leans hard on the EIN's attached business credit history and years-in-file. A revenue-based or MCA marketplace approves primarily on the cash flow in your business bank deposits and your revenue trend — the EIN simply confirms whose deposits they are. That is why a business with a thin or young credit file, but healthy, consistent deposits, can still get funded quickly. For more on how deposit-based underwriting works, see our pillar on how business funding actually works and our guide to revenue-based financing.

Decision Framework: When Your EIN Is Enough to Get Funded

An EIN is required to apply, but it is not what gets you approved. Use this to judge where you stand before you spend time on the wrong product.

Revenue-based / MCA marketplace works best when:

• Your business has a valid EIN and a business bank account in the entity's name.
• You have at least a few months of consistent deposits — roughly $10,000+ in monthly revenue is a common floor.
• Your personal FICO is 500 or higher (credit matters, but it is not the deciding factor).
• You need capital in 24-48 hours and can't wait weeks for a bank decision.
• Your business credit file is thin, young, or has a few blemishes — deposits carry the file.

Look elsewhere (or fix first) when:

• The name on your bank statements does not match the entity tied to your EIN — resolve this before applying.
• Your deposits are highly erratic or your account shows frequent negative days and returned items — cash flow is the underwriting engine here.
• You want the absolute lowest cost of capital and have the time and strong credit for a bank or SBA product — those reward a deep EIN credit history.
• You have no business bank account yet — open one under the EIN first; funders remit and debit through it.

No legitimate funder can 'guarantee' approval based on an EIN alone, and no advance is ever guaranteed. Any offer that promises funding purely off your EIN with no bank review is a red flag.

Example: How the Same EIN Reads to Different Funders

These figures are illustrative only, to show how the same valid EIN produces very different outcomes depending on the product's underwriting logic.

The pattern: a valid EIN is table stakes everywhere, but the marketplace reads the deposits, while the bank reads the credit history behind the EIN. Same number, different question being asked.

Getting Your EIN Funding-Ready

Before you apply for capital, spend ten minutes making sure your EIN file is clean — it removes the most common stalls:

• Confirm the exact legal name tied to your EIN on the CP 575 letter, and make sure your business bank account uses that identical name.
• Have the CP 575 or a recent tax return handy — some funders ask to see the number's source.
• Check that your entity is in good standing with your Secretary of State; a dissolved or delinquent entity can block funding.
• Route revenue through the business account under the EIN. Deposits into a personal account can't be underwritten as business revenue.
• If you never got an EIN, apply free at IRS.gov — never pay a third-party site for what the IRS issues at no cost — and wait until you have at least a short deposit history before seeking revenue-based capital.