An EIN generator for testing creates random US Employer Identification Numbers with valid IRS campus prefixes for development and QA - and the EIN validator checks any EIN against the format rules instantly.
What is an EIN?
An Employer Identification Number (EIN), also called a Federal Employer Identification Number (FEIN) or Federal Tax Identification Number (FTIN), is a nine-digit number assigned by the IRS to businesses and other entities operating in the United States.
EINs are required for:
- Filing federal tax returns (Form 941, 1120, 990)
- Hiring employees (W-2 reporting)
- Opening business bank accounts
- Applying for business licenses and permits
- Setting up payroll
- Non-profit organizations (required for 501(c)(3) applications)
EIN Format
An EIN follows the format XX-XXXXXXX, where:
- The first two digits are a campus code assigned by the IRS to its processing centers
- The remaining seven digits are a sequential serial number
Example: 12-3456789
Valid EIN prefixes (campus codes) include: 01–06, 10–16, 20–27, 30–39, 40–48, 50–69, 71–77, 80–88, 90–99. Not all two-digit combinations are valid IRS prefixes.
How to Use the EIN Generator
- Open the EIN Generator on UtilWave.
- Click Generate to produce EINs with valid IRS campus prefixes.
- Select the batch size to generate multiple EINs at once.
- Copy the generated numbers for use in test environments, seed data, or form validation testing.
- All numbers are fictitious - for development and QA only.
How to Use the EIN Validator
- Open the EIN Validator tool.
- Enter an EIN in XX-XXXXXXX format.
- The validator checks:
- Correct format (XX-XXXXXXX)
- Correct length (9 digits total)
- Valid IRS campus prefix (not all two-digit combinations are assigned)
- The result shows whether the format and prefix are valid.
EIN vs SSN: Key Differences
| Feature | EIN | SSN | |---|---|---| | Issued to | Businesses and entities | Individuals | | Format | XX-XXXXXXX | AAA-GG-SSSS | | Issued by | IRS | Social Security Administration | | Purpose | Federal tax identification | General national ID | | Public record | Yes (on tax-exempt filings) | No |
Why Developers Need Test EINs
Business-facing software - accounting platforms, payroll systems, HR tools, tax preparation software, and ERP systems - all handle EINs. During development:
- Real EINs must not be used in non-production systems
- Form validation testing requires EINs that pass format checks
- Database seeds need realistic business identifiers
- API integration tests need valid-format EINs to avoid rejection by format validators
Legal Note
These generated EINs are fictitious and intended solely for software testing and development. Using a fabricated EIN to misrepresent a business entity to the IRS or any financial institution is illegal and constitutes tax fraud.
FAQ
Is there a checksum for EINs? No - EINs do not have a check digit algorithm. Validation is based on format (length, separator) and prefix range only.
Can an individual have an EIN? Yes - sole proprietors and single-member LLCs can obtain an EIN instead of using their SSN for business purposes, which protects their SSN from being shared with vendors and clients.
What is the difference between an EIN and a TIN? TIN (Taxpayer Identification Number) is the umbrella term covering SSNs, EINs, and ITINs. An EIN is a type of TIN.
How do I apply for a real EIN? Apply directly on the IRS website (irs.gov) for free. Online applications are processed immediately.
Generate test EINs instantly with the free EIN Generator.