GST Syntax Audit
GSTIN Format & Checksum Validator
Verify whether a 15-digit Goods and Services Tax Identification Number (GSTIN) conforms to statutory GSTN format, decipher the registration state, embedded PAN number, registration entity sequence, and verify the check character.
Enter GSTIN 15-Digit Format
Format: 2 digits (State) + 10 alphanumeric (PAN) + 1 digit (Entity) + Z + 1 check digit.
Validation Report
Valid GSTIN Structure
Registration State:
07 - Delhi
Embedded PAN Card:
AAAAA0000A
Entity Serial Number:
Registration #1
Checksum Verification:
Valid Checksum (5)
Structure Breakdown:
- Characters 1-2: State Jurisdiction Code (01-38)
- Characters 3-12: Permanent Account Number (PAN)
- Character 13: Entity number of the same PAN holder within that state
- Character 14: Default letter 'Z'
- Character 15: Checksum digit based on Luhn mod 36 algorithm
- Characters 3-12: Permanent Account Number (PAN)
- Character 13: Entity number of the same PAN holder within that state
- Character 14: Default letter 'Z'
- Character 15: Checksum digit based on Luhn mod 36 algorithm
Why Validate GSTIN Syntax?
Entering an invalid GSTIN on an e-way bill, e-invoice, or GSTR-1 return results in immediate portal rejection or improper Input Tax Credit (ITC) pass-through for recipients. Verifying the statutory syntax ensures billing compliance before invoice transmission.