What is an EIN Number? How to Get One? (2025 Guide for US Companies)
, 2025
What is an EIN Number?
EIN (Employer Identification Number) is a 9-digit federal tax identification number issued by the IRS. Think of it as your company's official identifier in the USA.
What is an EIN Used For?
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Opening a bank account in the company's name
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Identifying the company in federal tax returns
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Employee hiring and payroll processes
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Some payment infrastructures and B2B contracts
Who Gets an EIN?
- Businesses established in the USA such as LLC, C-Corp, S-Corp
- Some foreign structures with taxable activities/income in the USA (depending on the situation)
How to Get an EIN?
The basic application form is Form SS-4.
- For those within the USA/eligible applicants, an online application option is available.
- In ineligible scenarios (especially international applications), alternative channels (fax/mail, etc.) determined by the IRS may come into play.
Important notes
- No fee is paid to the IRS for EIN (it's free).
- In some scenarios for foreign entrepreneurs, SSN is not required; however, the correct procedure and filling in the correct fields is critical.
Common Mistakes in EIN Application
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Mismatch between company structure and "entity type" selection on SS-4
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Incomplete/incorrect entry of responsible party information
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Format errors in address and contact fields (especially international addresses)
After EIN: Things Not to Forget
- Notification to the IRS may be required for company address or responsible party changes.
- EIN alone does not mean "tax compliance is complete"; returns and state obligations run separately.
Frequently Asked Questions
Q: Is EIN paid?
A: No. No fee is paid to the IRS for EIN.
Q: Can a US bank account be opened without an EIN?
A: In practice, most banks require EIN for company accounts.
Q: I don't have an SSN, can't I get an EIN?
A: In some scenarios, the process can proceed without SSN; the application needs to be made through the correct channel.
Resources (official/basic)
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IRS - About Form SS-4: https://www.irs.gov/forms-pubs/about-form-ss-4
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IRS - Get an EIN (no fee): https://www.irs.gov/businesses/small-businesses-self-employed/get-an-employer-identification-number
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Form SS-4 (Rev. Dec 2025): https://www.irs.gov/pub/irs-pdf/fss4.pdf
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Instructions for Form SS-4 (Rev. Dec 2025): https://www.irs.gov/pub/irs-pdf/iss4.pdf
Professional support
For professional support in setup, tax compliance, and bank processes, you can contact the Suits Finance team.