Reference Guide
IRS Fax Number Guide
The IRS fax number for EIN applications (Form SS-4) is 855-215-1627. Processing takes 4-7 business days. Complete directory of all IRS fax numbers.
EIN Fax
IRS Fax Number for EIN (Form SS-4)
EIN Application Fax: 855-215-1627
This number accepts Form SS-4 from all applicants worldwide. The IRS EIN Operation center in Cincinnati, Ohio processes all faxed applications within 4-7 business days.
Complete IRS Fax Directory
| Form | Purpose | Fax Number | |------|---------|-----------| | Form SS-4 | EIN Application | 855-215-1627 | | Form 2553 | S-Corp Election | 855-214-7520 | | Form 2848 | Power of Attorney | 855-214-7519 | | Form 8822-B | Change of Address | 855-214-7520 | | Form 8832 | Entity Classification | 855-214-7520 |
For EIN-specific details, see IRS fax number for EIN. For the complete fax application process, see EIN by fax.
Tips for Faxing the IRS
- Fax during US business hours for fastest processing
- Include a cover page with your return fax number
- Keep your transmission confirmation as proof
- Do NOT fax the same form twice (causes duplicates)
- Use a reliable fax service or ein.so ($49)
For non-residents who cannot use the IRS online tool, faxing Form SS-4 is the recommended method. Learn more about EIN for non-residents or see how to get an EIN for all methods.
Alternative Methods
| Method | Speed | SSN Required? | |--------|-------|--------------| | Online | Instant | Yes | | Fax | 4-7 days | No | | Phone | Same day | No | | Mail | 4-6 weeks | No | | ein.so | 4-7 days | No |
International
Faxing from Outside the US
International applicants use the same fax number: 855-215-1627. Options for faxing from abroad:
- Online fax services: eFax, HelloFax, FaxBurner (send from any country)
- Hotel business centers: Many hotels offer fax services
- Office supply stores: Staples, FedEx Office equivalents in your country
- ein.so: We handle the faxing for $49 — apply now
For country-specific guides, see our EIN country guides. For the Form SS-4 guide with line-by-line instructions.
Frequently Asked Questions
What is the IRS fax number for EIN?
The IRS fax number for EIN applications (Form SS-4) is 855-215-1627. This is the only fax number for EIN applications. All applicants, US and international, use this same number.
How long does fax EIN take?
The IRS processes faxed Form SS-4 applications within 4-7 business days. The IRS returns your EIN by fax to the number you provide on the form.
Can I fax from outside the US?
Yes. Use an online fax service or ein.so ($49). The fax number 855-215-1627 accepts faxes from international numbers.
Is faxing for EIN free?
Yes. The IRS charges $0 for faxed EIN applications. Your only cost is the fax service fee (if using online fax) or ein.so ($49).
What do I include with my fax?
Include your completed Form SS-4, a cover page with your return fax number, and your signature. No payment or supporting documents needed.
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