ein application mailing address: where to send ss-4 & receive cp575 (2025)

Confused about the ein application mailing address? Learn where to mail or fax Form SS-4, how to receive your CP575 letter, and avoid delays. Complete guide for foreign-owned LLCs. SpeedEIN helps you get your EIN in 10 days — compliant & fast.

ein application mailing address: where to send ss-4 and get your cp575

You’ve filled out Form SS-4 for your US LLC. You’re ready to submit your ein application.

But now you’re stuck on two questions:

📩 “Where do I send the SS-4 form?”
📬 “How do I get the CP575 letter?”

You’re not alone. The ein application mailing address depends on how you’re submitting (mail or fax) and whether you have a US presence.

And if you’re a foreign owner without an SSN, the rules are different.

This guide gives you the correct 2025 ein application mailing and fax addresses, explains where the CP575 will be sent, and shows you how to avoid common delays.

✅ ein application by mail: where to send ss-4 (2025)

If you’re submitting your ein application by postal mail, use the correct IRS address based on your situation.

📮 For International Applicants (No SSN/ITIN)

Internal Revenue Service
Attn: EIN Operation
Cincinnati, OH 45999
USA

📌 This is the official IRS address for:

  • Foreign-owned LLCs
  • Applicants without an SSN or ITIN
  • Mailed SS-4 forms

📬 Processing Time: 6–8 weeks from the date the IRS receives your packet.

📮 For Domestic US Applicants (With SSN)

Internal Revenue Service
Attn: EIN Operation
Kansas City, MO 64999
USA

⚠️ Note: This address is not for foreign applicants without a US tax ID.

📠 ein application by fax: fast & reliable (recommended)

Faxing is faster than mail and gives you proof of submission.

Use the IRS International Fax Number:

📞 Fax: 855-641-6935
📄 Cover sheet required
📍 For foreign-owned entities only

📌 Processing Time: 4–6 weeks

✅ Tip: Always save your fax confirmation page — it shows date, time, and number of pages sent.

📬 where will the cp575 be mailed?

After the IRS approves your ein application, they mail the CP575 (EIN assignment letter) to the mailing address you listed in Field 5b of Form SS-4.

📌 Important:

  • The CP575 cannot be emailed or picked up.
  • It must be delivered by USPS to a valid US street address.
  • PO Boxes are not accepted for CP575 delivery.

🚫 5 common mailing mistakes in ein application

  1. ❌ mistake: using a po box as mailing address
    → fix: use a physical us street address — friend, family, or verified virtual office.
  2. ❌ mistake: sending ss-4 to wrong irs center
    → fix: foreign owners must use cincinnati, oh 45999 (not kansas city).
  3. ❌ mistake: no cover sheet when faxing
    → fix: include a clear fax cover sheet with your name, llc name, and contact info.
  4. ❌ mistake: incomplete ss-4 form
    → fix: double-check fields 7 (responsible party), 8 (ssn/itin), and 17 (signature).
  5. ❌ mistake: hiding the mailing address
    → fix: never let a third party withhold or hide your cp575 delivery address.

🏢 what counts as a valid ein application mailing address?

The IRS requires a real, deliverable address — not just a mailbox.

✅ Acceptable:

  • Your friend or family’s home address in the US
  • A co-working space with mail reception
  • A registered agent with physical mail handling
  • A virtual office that receives and forwards USPS letters

❌ Not Acceptable:

  • A PO Box alone
  • A UPS Store without mail-forwarding service
  • An address that doesn’t accept USPS deliveries
  • A law firm or agent that won’t forward your CP575

📌 Pro Tip: If your mailing address can’t receive USPS, your CP575 will be returned, and you’ll need to resubmit — adding 4+ weeks of delay.

📄 how to fill out field 5b correctly

On Form SS-4, Field 5b asks for your mailing address.

Here’s how to fill it:

深色版本[Your LLC Name]  
c/o [Your Name or Office Name]  
123 Main Street, Suite 100  
Anytown, CA 90210  
United States

📌 Key Rules:

  • Must be a US address
  • Must accept USPS deliveries
  • Can include “c/o” for clarity
  • No P.O. Box — even if listed alongside a street address

🚀 speedein: we handle your ein application & cp575 delivery

We help foreign entrepreneurs submit their ein application with the correct mailing address — and guide them to receive the CP575 safely.

✅ what we do:

  • Verify your valid us mailing address
  • Complete your ss-4 form with no errors
  • Submit via fax (855-641-6935) for faster processing
  • Provide cp575 delivery instructions
  • Offer direct support — no bots, no wait times

✅ our guarantee:

  • ⏱️ ein in 10 business days
  • 📬 cp575 guidance within 20 business days
  • 🔐 100% irs compliant — you are the responsible party
  • 📩 no hidden fees, no document retention

📞 submit your ein application with the right mailing address

Don’t let a wrong address delay your business. Let SpeedEIN ensure your ein application is sent correctly and your CP575 reaches you.

📌 you provide:

  1. llc articles of organization
  2. responsible party passport
  3. valid us mailing address (where cp575 can be delivered)

📩 start now: speedein.com

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