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IRS Form SS-4 – Application for Employer Identification Number (EIN)

What is Form SS-4?

Form SS-4 is used to apply for an Employer Identification Number (EIN), which is required for businesses to file taxes, open bank accounts, and hire employees.

Who needs an EIN?

  • Corporations, partnerships, and LLCs.

  • Sole proprietors hiring employees.

  • Foreign-owned entities required to file with the IRS.

Key points

  • The EIN acts like a business’s Social Security Number.

  • It is necessary for filing forms such as 5472, 1065, and 1120.