How do I apply for an EIN?

How to Apply for an EIN in California

An Employer Identification Number (EIN) is essential for businesses in California to manage taxes, hire employees, and open business bank accounts. Here is a practical guide to obtaining your EIN efficiently.

Steps to Apply for an EIN

• Determine Eligibility: Your business must be located in the United States or U.S. territories and have a valid Taxpayer Identification Number (such as a Social Security Number).
• Gather Required Information: Prepare your business name, address, responsible party’s name and Social Security Number, and details about your business structure (LLC, corporation, sole proprietorship, etc.).
• Apply Online: The fastest and most convenient method is to apply through the IRS EIN Online Assistant at IRS EIN Application. This service is available Monday to Friday, 7 a.m. to 10 p.m. Eastern Time.
• Alternative Application Methods: If online application is not possible, you can apply by fax or mail using Form SS-4. Fax applications typically take about four business days, while mail applications may take up to four weeks.
• Receive Your EIN: Once approved, you will receive your EIN immediately online or by mail/fax depending on your application method.

Operational Considerations After Receiving Your EIN

• Business Registration: Use your EIN when registering your business with the California Secretary of State, if applicable.
• Payroll Setup: Your EIN is required to set up payroll accounts and report employee taxes to California Employment Development Department (EDD).
• Tax Filing: Include your EIN on all federal and state tax filings, including sales tax and income tax returns.
• Recordkeeping: Keep your EIN confirmation notice in your business records for reference during audits and compliance checks.
• Update Information: If your business structure or ownership changes, update your EIN information accordingly to maintain compliance.

As of 2026, the EIN application process and requirements remain consistent, but always verify current procedures on the official IRS website to ensure compliance.