US ITIN Generator
Generate and format valid Individual Taxpayer Identification Numbers (ITIN) for US tax QA testing.
Waiting for generation...
About the US ITIN
The ITIN (Individual Taxpayer Identification Number) is a 9-digit tax processing number issued by the IRS for individuals required to have a US taxpayer identification number who are not eligible for an SSN.
It always begins with the number '9' and has specific 4th and 5th digit ranges (50–65, 70–88, 90–92, 94–99) defined by the IRS.
Anatomy & Structure of ITIN (9 Digits: 9XX-XX-XXXX)
The IRS Individual Taxpayer Identification Number is divided into 3 regulatory parts:
| Position | Field | Length | Meaning & Rule | Example |
|---|---|---|---|---|
| 1 to 3 | Area (Starts with 9) | 3 digits | Must start with digit 9 (900-999 series reserved exclusively for IRS processing) | 912 |
| 4 & 5 | Group Digits | 2 digits | Official IRS ranges: 50-65, 70-88, 90-92, 94-99 | 75 |
| 6 to 9 | Serial Number | 4 digits | Sequential identifier from 0001 to 9999 (0000 forbidden) | 1234 |
ITIN Validation Algorithm (IRS Rules)
ITIN verification checks the mandatory leading 9, authorized group ranges, and non-zero serials:
Starts with 9 && MiddleDigits in [50-65, 70-88, 90-92, 94-99] && Serial != 0000
- 1. Confirm the document comprises exactly 9 numeric digits.
- 2. Verify that the first digit is strictly 9.
- 3. Extract the 4th and 5th digits (Group Number).
- 4. Check that the group falls within allowed IRS ranges: 50-65, 70-88, 90-92, or 94-99.
- 5. Verify the final 4 digits are not 0000.