EIN (Tax ID): When You Need One and How to Apply

An EIN (Employer Identification Number) is a nine-digit number that the IRS assigns to your business for tax purposes. It's also known as a Tax ID Number, Federal Tax ID, or Federal Employer Identification Number (FEIN).

Think of it as a Social Security Number for your business. While individuals use an SSN, businesses use an EIN to identify themselves to the IRS, banks, and other entities.

Your LLC needs an EIN if you:

• Have or plan to hire employees
• Have more than one member (multi-member LLC)
• Choose to be taxed as a corporation (S-Corp or C-Corp)
• File tax returns for employment, excise, or alcohol, tobacco, and firearms taxes

Even if not technically required, you should get an EIN to:

• Open a business bank account (most banks require it)
• Keep your SSN private (use your EIN instead of your SSN on forms)
• Build business credit
• Work with certain vendors that require a tax ID

Online (Recommended)

If you have an SSN or ITIN, apply online at IRS.gov:

• Navigate to the EIN Assistant
• Select "Limited Liability Company" as your business type
• Provide your LLC's information
• Receive your EIN instantly

By Fax or Mail (For Non-US Residents)

If you don't have an SSN or ITIN, you must apply by fax or mail using IRS Form SS-4. Processing takes 2-4 weeks by fax, or 4-6 weeks by mail.