IRS Form SS-4 fax number (EIN application)
Where to fax Form SS-4, Application for Employer Identification Number (EIN), under the IRS Fax-TIN program.
Verified October 21, 2026Checked against Instructions for Form SS-4 (12/2025), How To Apply for an EIN: Apply by fax. The agency notes these numbers may change without notice.
| Who uses it | Office | Fax |
|---|---|---|
| Applicants with a legal residence, principal place of business, or principal office or agency in one of the 50 states or the District of Columbia | Fax-TIN, 50 states and DC | 855-641-6935 |
| Applicants with no legal residence, principal place of business, or principal office or agency in any state or in the District of Columbia (for example, in a U.S. territory or an international location) | Fax-TIN, U.S. territories and international | 855-215-1627 304-707-9471 from outside the US |
Before you fax
- Under the Fax-TIN program the IRS says you generally receive your EIN by fax within 4 business days.
- Put your own fax number on the form so the IRS can fax the EIN back to you.
- Fax-TIN numbers can only be used to apply for an EIN.
- Apply for an EIN onlineOnline applications are only for applicants in the United States or U.S. territories. The IRS recommends applying electronically if possible.