Fax Form SS-4 and get your EIN in ~4 business days

If the responsible party has no SSN or ITIN, the IRS online EIN tool is unavailable — the practical alternatives are phone, mail (4+ weeks) or fax. Faxed SS-4 applications with a return fax number are typically answered with an EIN in about 4 business days.

Upload your completed, signed SS-4 and we transmit it to the correct IRS fax line for your situation, then email you the transmission report.

Don't have a fax machine for the IRS to reply to? Tick “we receive the IRS reply and email it to you” (+$4.99) at checkout: the IRS faxes your EIN assignment to our secure receiving line and it lands in your inbox as a PDF the moment it arrives.

Fax Form SS-4 (EIN) now — $2.49

Where this form faxes

ScenarioIRS fax number
Principal business in the 50 states or DC855-641-6935
No legal residence/principal office in any state, sending from within the U.S.855-215-1627
Sending from outside the U.S.304-707-9471 (not toll-free)

IRS fax numbers change without notice. We re-verify our routing table against the current IRS form instructions, and the exact number your document was sent to is printed on your transmission report.

Numbers last verified against IRS sources: 2026-07-19 · Official IRS source

Deadline

No statutory deadline, but you need the EIN before filing returns, opening a bank account or filing Form 5472.

Frequently asked questions

Yes. The online application requires an SSN/ITIN, but Form SS-4 by fax or mail does not — leave line 7b blank or write 'Foreign'. Fax is the fastest written channel.

The IRS states it faxes the EIN back in about 4 business days when you provide a return fax number, versus 4–5 weeks by mail.

855-641-6935 if the entity's principal business is in a U.S. state or DC; 855-215-1627 for foreign/territory entities when sending from inside the U.S.; 304-707-9471 when sending from abroad. Our form asks two quick questions and routes it automatically.

The form must be signed by the responsible party or authorized person. A scanned handwritten signature on the faxed copy is standard practice.

Yes — a foreign individual can be the responsible party. Enter 'Foreign' on line 7b instead of an SSN/ITIN.

Tick “we receive the IRS reply and email it to you” (+$4.99) in our send form: you list our secure receiving line as the applicant's fax number, the IRS faxes the EIN assignment there, and we email it to you as a PDF the moment it arrives. The IRS quotes about 4 business days but its actual response time is outside anyone's control and can take weeks.

Call the IRS Business & Specialty Tax Line (800-829-4933) and ask for a 147C EIN verification letter — the agent can fax it to you while you're on the line, the only same-day channel; mail takes weeks. No fax machine to receive it on? Write to [email protected] and we'll take the 147C on our secure receiving line and email you the PDF.

Ready to fax Form SS-4 (EIN)?

$2.49 flat up to 25 pages · correct IRS number resolved automatically · transmission report to your email.

Send it now

We use analytics cookies to see which pages and features get used, so we can improve the service. Learn more about our cookie policy.