An EIN and an ITIN are both used in federal tax administration, but they identify different taxpayers and are requested through different processes.
What an EIN identifies
An Employer Identification Number generally identifies a business or other entity for federal tax purposes. A business may need one for employees, certain entity types, tax filings, banking, or other administrative requirements.
The responsible party and legal business information must be entered consistently. An EIN should not be requested repeatedly for the same entity unless IRS rules call for a new number.
What an ITIN identifies
An Individual Taxpayer Identification Number is for certain individuals who need a U.S. taxpayer identification number but are not eligible for a Social Security number. It is commonly requested with Form W-7 and supporting identity and foreign-status documentation.
An ITIN is used for tax processing. It does not authorize employment, change immigration status, or provide Social Security benefits.
You may encounter both numbers
An individual owner may use an ITIN on personal tax filings while a business uses its EIN for business accounts and filings. One does not substitute for the other.
Avoid common application problems
- Confirm eligibility before applying
- Use names exactly as shown on supporting documents
- Submit complete, current documentation
- Keep copies and delivery records
- Respond promptly to requests for additional information
- Protect tax identification numbers from unnecessary disclosure
Get help with the whole tax picture
The right application depends on who needs to be identified and for what tax purpose. New Century Business Services offers bilingual ITIN assistance and business tax setup support in Alabama.
This article provides general tax information, not legal or immigration advice.





