Business

Form SS-4: Application for Employer Identification Number

Used to apply for an Employer Identification Number (EIN), which is required for businesses to file tax returns, open bank accounts, and hire employees.

Download Form SS-4 PDFAbout on IRS.govInstructions PDF

Who Files This Form?

New businesses, employers, non-profit organizations, trusts, estates, and other entities needing an EIN.

Key Fields

  • Legal name of entity
  • Trade name
  • Type of entity
  • Reason for applying
  • Date business started
  • Principal activity

Filing Deadlines

Late Filing Penalty

No penalty for late filing, but an EIN is required before filing employment or excise tax returns.

Related Forms

Form 1120

U.S. Corporation Income Tax Return

Form 1120-S

U.S. Income Tax Return for an S Corporation

Form 1065

U.S. Return of Partnership Income

Form 940

Employer's Annual Federal Unemployment (FUTA) Tax Return

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