How to Get an EIN
An Employer Identification Number (EIN) is a unique nine-digit identifier issued by the IRS to businesses for tax filing and reporting. You can get an EIN online instantly, by fax within four business days, or by mail within four to six weeks. The online method is the fastest and most common way to obtain one.
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Before you begin the application, confirm that your business entity is eligible. Generally, you need an EIN if you operate as a corporation, partnership, or limited liability company, or if you have employees. Sole proprietors without employees and single-member LLCs may use their Social Security number instead, though getting an EIN is still optional and can help separate personal and business finances.
How to Get an EIN Online
The IRS Electronic EIN Assistant is the quickest method and is available Monday through Friday, 7:00 a.m. to 10:00 p.m. Eastern Time. You complete the interview-style form, which typically takes less than 15 minutes. The system validates your information in real time and issues the EIN immediately upon completion.
- You must have a valid Taxpayer Identification Number (SSN, ITIN, or prior EIN).
- You can only receive one EIN per responsible party per day.
- The online application is only available for U.S.-based applicants or their authorized representatives.
Alternative Methods to Get an EIN
If you cannot apply online, you have two other options. To get an EIN by fax, complete Form SS-4 and fax it to the IRS at the designated number for your state. The IRS processes faxed applications within approximately four business days and returns the EIN by fax. To get an EIN by mail, send the completed Form SS-4 to the appropriate IRS address for your location, and expect a processing time of four to six weeks.
Required Information for the Application
Whether you apply online, by fax, or by mail, you will need to provide the same core information. Have the following ready before you start to avoid delays:
- The legal name and address of the entity.
- The responsible party's name and Taxpayer Identification Number.
- The reason for applying (e.g., starting a new business, hiring employees, opening a bank account).
- The type of business entity and the date it was formed or acquired.
- The expected number of employees in the next 12 months and the date of first wages.
After You Get an EIN
Once issued, an EIN does not expire and is permanent for that business entity. You should use the number immediately on federal tax returns, business bank account applications, and state tax registrations. If you lose your confirmation letter, you can retrieve the EIN by calling the IRS Business & Specialty Tax Line or by checking prior correspondence.