What is the fax number for IRS — Form SS-4 (Apply for EIN)?

The commonly listed fax line for IRS — Form SS-4 (Apply for EIN) (IRS EIN International / Fax Applications) is (855) 641-6935. Always confirm on the institution’s latest instructions before you send — numbers can change.

How do I fax to IRS — Form SS-4 (Apply for EIN) online without a fax machine?

Open the send form on this page (number is pre-filled), upload a PDF or image, pay, and RonFax transmits the fax for you. You’ll get a status page and email confirmation when delivery completes.

How much does it cost to send a fax to IRS — Form SS-4 (Apply for EIN)?

RonFax is pay-as-you-go: $1.99 covers up to 3 pages, then $0.50 per extra page. No monthly plan required.

What should I include when faxing IRS — Form SS-4 (Apply for EIN)?

Typical packets include: Signed Form SS-4; Legal business name and address; Reason for applying and entity type; Cover letter with contact email and phone. Use a cover page if the institution asks for a subject or routing note.

Is this an official IRS — Form SS-4 (Apply for EIN) page?

No — this is an independent send guide from RonFax. We help you transmit documents to the listed number; we are not affiliated with IRS — Form SS-4 (Apply for EIN). Verify requirements on their official site when unsure.

Fax to Government & tax

How to Fax to IRS — Form SS-4 (Apply for EIN): Step-by-Step Guide

Government & tax

IRS — Form SS-4 (Apply for EIN)

Washington, DC

Verified Mar 2026

Fax number

(855) 641-6935

Pre-filled below — send online in about a minute. No fax machine.

Send this fax online →

What to include

✓Signed Form SS-4
✓Legal business name and address
✓Reason for applying and entity type
✓Cover letter with contact email and phone

Send your fax

Quick info

Department: IRS EIN International / Fax Applications

Fax line: (855) 641-6935

Complete every field on Form SS-4 — incomplete forms are rejected
Include responsible party name and SSN/ITIN as required
Keep the fax confirmation and RonFax status receipt

This line is commonly cited for international SS-4 fax filings. U.S. domestic applicants should follow current IRS SS-4 instructions.

Prerequisites — what to prepare

Before you fax IRS — Form SS-4 (Apply for EIN), gather these items into one PDF when possible:

✓Signed Form SS-4
✓Legal business name and address
✓Reason for applying and entity type
✓Cover letter with contact email and phone

Step-by-step — send via RonFax

No fax machine required. Pay once from $1.99 for up to 3 pages ($0.50 per extra page).

Prepare Form SS-4 PDF per IRS instructions.
Confirm fax eligibility and destination number on irs.gov.
Send through RonFax — pay once, track transmission.

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Frequently asked questions

What is the fax number for IRS — Form SS-4 (Apply for EIN)?: The commonly listed fax line for IRS — Form SS-4 (Apply for EIN) (IRS EIN International / Fax Applications) is (855) 641-6935. Always confirm on the institution’s latest instructions before you send — numbers can change.
How do I fax to IRS — Form SS-4 (Apply for EIN) online without a fax machine?: Open the send form on this page (number is pre-filled), upload a PDF or image, pay, and RonFax transmits the fax for you. You’ll get a status page and email confirmation when delivery completes.
How much does it cost to send a fax to IRS — Form SS-4 (Apply for EIN)?: RonFax is pay-as-you-go: $1.99 covers up to 3 pages, then $0.50 per extra page. No monthly plan required.
What should I include when faxing IRS — Form SS-4 (Apply for EIN)?: Typical packets include: Signed Form SS-4; Legal business name and address; Reason for applying and entity type; Cover letter with contact email and phone. Use a cover page if the institution asks for a subject or routing note.
Is this an official IRS — Form SS-4 (Apply for EIN) page?: No — this is an independent send guide from RonFax. We help you transmit documents to the listed number; we are not affiliated with IRS — Form SS-4 (Apply for EIN). Verify requirements on their official site when unsure.

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