How do I apply for an EIN?

How to Apply for an EIN in Massachusetts

An Employer Identification Number (EIN) is essential for most businesses operating in Massachusetts. It is used for tax reporting, hiring employees, opening bank accounts, and complying with state and federal regulations.

Steps to Obtain an EIN

• Determine Eligibility: Ensure your business is located in the United States or its territories. Most business types, including sole proprietorships, partnerships, corporations, and LLCs, need an EIN if they have employees or meet IRS criteria.
• Gather Required Information: Prepare your business legal name, address, Social Security Number or Individual Taxpayer Identification Number of the responsible party, and the type of entity you are forming.
• Apply Online: The fastest and most efficient method is to apply through the IRS EIN Online Assistant at IRS EIN Application. This service is available Monday through Friday, 7 a.m. to 10 p.m. Eastern Time.
• Alternative Application Methods: You can also apply by fax or mail by submitting Form SS-4 to the IRS. Processing times vary, with online applications providing immediate EIN issuance.

Operational Considerations After Receiving Your EIN

• Business Registration: Use your EIN when registering your business with the Massachusetts Secretary of the Commonwealth if required for your business type.
• Payroll Setup: Your EIN is necessary to set up payroll accounts with Massachusetts Department of Revenue and to comply with state payroll tax withholding and reporting.
• Tax Reporting: Use your EIN for federal tax filings, including income tax, employment taxes, and excise taxes if applicable.
• Recordkeeping: Maintain your EIN documentation securely as part of your business records for compliance and audit purposes.

As of 2026, applying online remains the most streamlined approach for Massachusetts businesses to obtain an EIN quickly and start operations efficiently.