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Form SS-4Business & Payroll

Application for Employer Identification Number (EIN)

Used by businesses to apply for an Employer Identification Number.

View the official IRS page

Business & Payroll

Employment tax, payroll reporting and business registration forms.

Before you file

Always download the current revision directly from IRS.gov. Forms are revised between tax years, and filing on a superseded version is a common cause of processing delays.

If this form is part of resolving a balance, an audit or a collection notice, the way it is completed matters as much as filing it. The figures on a financial statement or an offer decide what the IRS will accept. We can review your situationbefore anything is submitted, at no cost.

Related Forms

Others in Business & Payroll.

Form 941

Employer's Quarterly Federal Tax Return

Used by employers to report income, Social Security, and Medicare taxes withheld from wages.

Form 940

Employer's Annual Federal Unemployment (FUTA) Tax Return

Used by employers to report and pay federal unemployment (FUTA) tax.

Form 7004

Application for Automatic Extension (Business Returns)

Used to request an automatic extension of time to file certain business income tax returns.

Form W-9

Request for Taxpayer Identification Number and Certification

Used to provide your taxpayer ID to a person or business that must report payments to the IRS.

This page summarizes what Form SS-4 is used for and links to the official source. It is not tax advice, and it is not a substitute for the IRS instructions that accompany the form. The current revision and full instructions are on IRS.gov.

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