Apply for an Employer Identification Number (EIN)

Most businesses need an EIN. Learn how to apply online or by mail with the IRS.

IRS

Phone

For Individuals (800) 829-1040

Customer service representatives are available 7 a.m.-7 p.m., Monday through Friday

For Businesses (800) 829-4933

Customer service representatives are available 7 a.m.-7 p.m., Monday through Friday

Online

The Details

How to apply

To apply online, please visit the IRS website. 

The Form SS-4 (see instructions) can be mailed or faxed to the IRS.

 

More info

You can only receive your EIN through the IRS. If you have questions about getting an EIN, contact the IRS.

Once you’ve received your EIN from the IRS, you can register your business with MassTaxConnect.

Contact

Address

JFK Federal Building
15 New Sudbury St., Boston, MA 02203

Phone

For Individuals (800) 829-1040

Customer service representatives are available 7 a.m.-7 p.m., Monday through Friday

For Businesses (800) 829-4933

Customer service representatives are available 7 a.m.-7 p.m., Monday through Friday

Online

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