Article · Instructions

Instructions for Form SS-4 (12/2025)

Internal Revenue Service · irs.gov Free Intermediate

The official instructions, including the international phone line (267-941-1099, 6 a.m. to 11 p.m. Eastern, weekdays) that issues an EIN on the call, and the Fax-TIN route (304-707-9471 from outside the US) that returns one in about 4 business days.

  • International applicants can get an EIN by phone the same day.
  • By fax, expect the EIN back within about 4 business days.
  • Fill every line of SS-4 for the company, not for yourself.
Open on irs.gov ↗

The question it answers

  1. How do I get an EIN for a US company?

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