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Glenn Hegar  ·  Texas Comptroller of Public Accounts

Check-Digit Calculator

Select EIN or SSN/ITIN:

Note: This tool will not generate 7 numbers.

The Check-Digit Calculator uses a nine-digit base number to calculate a unique 11-digit Texas Identification Number (TIN).

An 11-digit TIN has three components: the one-digit prefix number, nine-digit base number and one-digit self-check number. The nine-digit base number is usually a Federal Employer Identification Number (EIN), Social Security Number (SSN) or Individual Taxpayer Identification Number (ITIN). TINs can also be randomly assigned 11-digit numbers that begin with 7.

The Check-Digit Calculator calculates a TIN number based on the EIN or SSN/ITIN for reference purposes only. Before a payee can receive payment from the state of Texas, the payee must be set up in the Texas Identification Number System (TINS).

See the TexPayment Resource for more information.

Glenn Hegar
Texas Comptroller of Public Accounts
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