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Check whether a GSTIN is correctly formatted.
TaxNext's GSTIN checker validates whether a GST Identification Number is shapedlike a real one — a 15-character string encoding a state code, an embedded PAN, an entity code, a fixed 'Z', and a checksum character. It does not, and cannot, confirm whether a given GSTIN is actually registered or active — that requires the government's own GST portal lookup, which this tool does not perform.
Valid format — state code 29, embedded PAN ABCPD1234E
State code 29 is Karnataka. Characters 3–12 are the PAN of the entity the GSTIN was issued to.
Valid format — state code 07, embedded PAN AABCT5678F
State code 07 is Delhi. The embedded PAN's 4th letter (C) marks the holder as a company.
Invalid format
Invalid — the 14th character of a GSTIN must always be the letter Z by convention, and here it's A instead.
Structural format only, including the checksum position — but not the checksum digit's actual value, which needs GSTN's internal modulus-36 algorithm this tool doesn't implement. It never claims a GSTIN is real, active, or verified with GSTN. For an actual status check, use the government's official GST portal.
Reviewed by VNAV & Associates, Chartered Accountants. Last updated: August 2026.
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