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How to find a business tax ID number?

Author

Rachel Davis

Updated on January 27, 2026

EIN Lookup – How to Lookup the Tax ID of Your Business or Other Businesses An Employer Identification Number (EIN), is a unique nine-digit number issued by the Internal Revenue Service (IRS) to identify your business. All business EINs are public information. We show you how to do an EIN Lookup for your own business or other businesses.

Where can I Find my Ein number for my business?

The easiest way to find your EIN is to dig up your EIN confirmation letter. This is the original document the IRS issued when you first applied for your EIN. The letter will show your business tax ID and other identifying information for your business.

When do you need an employer ID number for a business?

Employer Identification Number (EIN) Most businesses need an Employer Identification Number (EIN). Your EIN is your federal tax ID number. You should get one right after you register your new business. Find out from the IRS if you need an EIN, how to get one, what to do if you’ve lost or misplaced yours, and more.

What do you call a federal tax ID number?

An employer identification number — also called an EIN or federal tax ID number — is a unique numerical identifier that is assigned to businesses by the IRS principally for tax purposes. Your company’s EIN is like a Social Security number for your business and thus very important.

What does it mean to look up federal tax ID?

A federal tax ID lookup is a method of searching for a business’s information using their tax identification number (FTIN), or employer identification number (EIN).

Where can I Find my Employer Identification Number?

EINs are used by employers, sole proprietors, corporations, partnerships, non-profit associations, trusts, estates of decedents, government agencies, certain individuals, and other business entities. The HIPAASpace EIN Lookup & Verification Service is a public directory of Employer Identification Number (EIN) records.

What kind of iD do you need to start a business?

Start your business in 10 steps. Your state tax ID and federal tax ID numbers — also known as an Employer Identification Number (EIN) — work like a personal social security number, but for your business. They let your small business pay state and federal taxes. Your Employer Identification Number (EIN) is your federal tax ID.

If all else fails and you really cannot find your EIN on existing documents, you can reach out to the IRS by calling the Business & Specialty Tax Line at 800-829-4933. Make sure to call between the hours 7 a.m. and 7 p.m. local time.

What should I do if my Ein number is no longer active?

While it is impossible to discard your business’ EIN, it is possible to notify the IRS that the EIN is no longer active. To do this, you must send a letter to the IRS including the full name of the business, the EIN, the business address, and the reason for the account closure. This letter can be faxed to (855) 214-7520 or sent to:

Can a Ein number be reassigned to another business?

Even if the EIN was never formally used to open a bank account or file income taxes, the EIN can never be used for another business, nor may the EIN be reassigned. Business owners know the importance of their EIN, or Employer Identification Number.

What does it mean to have an employer ID number?

An Employer Identification Number (EIN) is also known as a Federal Tax Identification Number, and is used to identify a business entity. Generally, businesses need an EIN. You may apply for an EIN in various ways, and now you may apply online .

How to find an EIN number fora company?

An Employer Identification Number (EIN) is also known as a Federal Tax Identification Number, and is used to identify a business entity. Generally, businesses need an EIN. You may apply for an EIN in various ways, and now you may apply online. This is a free service offered by the Internal Revenue Service and you can get your EIN immediately.

When do you need a federal tax ID number?

When a business changes its structure, it will usually be issued a new ID number. The United States federal government uses a federal tax identification number for business identification. An EIN will possess nine numbers and is used by the IRS for administering taxes for the following entities:

What can you do with an employer ID number?

An EIN or Employer Identification Number is a tax ID number assigned by the IRS (Internal Revenue Service). The EIN is used to identify a business for tax purposes. You can use this number to do the following: Open a Bank Account in the USA; Apply for Business Permits; File a Business Tax Return; Hire Employees; Start a Corporation or Partnership

When to use Ein or tax ID for a business?

This number is used to identify a business entity or additional entities like Estates or Trusts, just as you as an individual would be identified by your Social Security Number. The most common names are EIN and Tax ID. Changed the legal character or ownership of your organization (i.e., you incorporate a Sole Proprietorship or form a Partnership)