The IRS SS-4 fax number for domestic applicants is 855-641-6935. Fax your EIN application and receive your Employer Identification Number in as little as 4 business days — no fax machine required with mFax.to.
Frequently Asked Questions
What is the IRS SS-4 fax number for domestic applicants?
The IRS SS-4 fax number for U.S.-based applicants is 855-641-6935. This line is available 24 hours a day, 7 days a week under the IRS Fax-TIN program.
How long does it take to get an EIN by fax?
The IRS typically processes faxed Form SS-4 applications within 4 business days and returns your EIN by fax. A written confirmation letter arrives by mail within 2-3 weeks.
What is the IRS fax number for international SS-4 applicants?
International applicants calling from within the U.S. should use 855-215-1627. If you are located outside the United States, fax to 304-707-9471.
Can I fax Form SS-4 without an SSN or ITIN?
Yes. Non-resident foreign applicants who are ineligible for an SSN or ITIN may enter "foreign" or "N/A" on Line 7b of the SS-4 form and fax to the international line.
What happens after I fax Form SS-4 to the IRS?
The IRS processes your application under the Fax-TIN program and faxes your EIN back within 4 business days. If you don't hear back in 5 business days, call the IRS Business & Specialty Tax Line at 800-829-4933.