Employee ID Number

Recommended by IRS

Employer Identification Number

Information about Employer Identification Numbers (EIN), also known as a Federal Tax Identification Number. An EIN is used to identify a business entity.

Apply for an Employer Identification Number (EIN) online
Information about how to apply online for an Employer Identification Number.
Do you need a new EIN?
Generally, businesses need a new EIN when their ownership or structure has changed.

Get an employer identification number

Use this tool to get an EIN directly from the IRS in minutes for free. Answer questions, submit the application and, if approved, we’ll issue your EIN immediately online.
General Information
Small Businesses

Employer identification number

Find out if you need an employer identification number (EIN). Get one online, free from the IRS. Don’t pay for an EIN.
General Information
Small Businesses

Lost or misplaced your EIN?

Find out what you need to do if you have lost or misplaced your Employer Identification Number (EIN).
General Information
Small Businesses

When to get a new EIN

Generally, businesses need a new Employer Identification Number (EIN) when their ownership or structure has changed. Determine if you need a new EIN.
General Information
Small Businesses

How to Apply for an EIN

Apply for an Employer Identification Number (EIN) online, or by fax, mail or, for international applicants, by phone.
General Information
Small Businesses

Online EIN: Frequently asked questions

If you are unfamiliar with the online Employer Identification Number (EIN) application process, review these questions and answers.
General Information
Small Businesses

Do you need an EIN?

Determine if you need an employer identification number (EIN) by answering these questions.
General Information
Small Businesses

Employer identification number

Review the requirements and process for obtaining an employer identification number for tax-exempt organizations.
General Information
Charities and Nonprofits

Publication 1635, Understanding Your EIN

Publication 1635, Understanding Your EIN, provides general information on Employer Identification Numbers (EINs).
Forms and Instructions

Taxpayer identification numbers (TIN)

Review the various  taxpayer identification numbers (TIN) the IRS uses to administer tax laws. Find the TIN you need and how to get it.
General Information
Nonresidents