piighost/in-gstin

Indian GST identification number: the state code, the holder's PAN, an entity digit, a fixed Z, then a checksum character. The Z in the fourteenth position is a constant, which makes this fifteen character string one of the safest business identifiers to detect.

Label: IN_GSTIN

Pattern

(?<!\w)[0-3]\d[A-Z]{5}\d{4}[A-Z][A-Z0-9]Z[A-Z0-9](?!\w)

Must be caught

• The invoice carries 27AAPFU0939F1ZV as the GSTIN. → 27AAPFU0939F1ZV
• Register under 29AABCU9603R1ZM for Karnataka. → 29AABCU9603R1ZM

Must be left alone

• The code 27AAPFU0939F1XV has no Z
• Reference 27AAPFU0939F1Z

Tags: in, government-id, business, finance

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