Fax Form SS-4 (EIN application) to the IRS
If your business is in one of the 50 states or Washington, D.C., fax Form SS-4 to 855-641-6935. The IRS faxes the EIN back, generally within 4 business days.
| Who | Fax number |
|---|---|
| Applicants in the 50 states or Washington, D.C. | 855-641-6935 |
| International applicants (no legal residence or principal place of business in a state or D.C., including U.S. territories), faxing from within the United States | 855-215-1627 |
| International applicants faxing from outside the United States | 304-707-9471 |
Checked against Instructions for Form SS-4 (Rev. December 2025), IRS.gov on October 12, 2026.