An Individual Taxpayer Identification Number (ITIN) is the IRS tax-processing number for people who must file US taxes but cannot get a Social Security Number — commonly non-resident aliens and their dependents. It mimics the SSN format 9XX-XX-XXXX but follows stricter assignment rules. This free validator applies those rules so tax professionals can pre-screen client ITINs locally.
How it works
An ITIN is 9 digits with three structural requirements:
- Leading digit — the first digit must be
9. - Middle group — the two middle digits (positions 4–5) must fall in one of the IRS-assigned ranges:
70–88,90–92, or94–99. - Length — exactly 9 digits, written as
9XX-GG-XXXX.
If all three hold, the ITIN is structurally valid. If any fails, the tool names the broken rule. Note the gaps: middle groups 89 and 93 are deliberately excluded from the valid set.
Example
Validate 912-78-1234 → leading digit 9 (valid), middle group 78 (valid: in 70–88), length 9 (valid). The ITIN is format-valid.
Validate 912-89-1234 → middle group is 89, which is not in any assigned range, so it is rejected with a clear reason.
Tips and notes
A valid format does not mean the ITIN is currently active — ITINs expire after three years of non-use on a tax return. For active-status confirmation, only the IRS can verify. Because an ITIN is sensitive taxpayer PII, this tool never transmits it; all checks run entirely in your browser.