India GSTIN Validator
Validate Indian GST Number
Enter an Indian Goods and Services Tax Number to verify its validity.
About this Validator
This tool validates Indian GSTIN numbers according to GST Act requirements.
The validator checks if a given GSTIN follows the correct structure and verifies its check digit using the Luhn mod 36 algorithm.
This validation only confirms if a GSTIN follows the correct format. It does not verify if the number is actually registered with GST authorities.
What is a Goods and Services Tax Identification Number (GSTIN)?
GSTIN Structure (15 characters): • First 2: State code • Next 10: PAN number • 13th: Registration number • 14th: Fixed as 'Z' • Last: Check digit
Validation Features: • Length verification • State code validation • PAN number check • Format compliance • Check digit validation
Used for: • GST registration • Business transactions • Tax filing • Input tax credit • E-way bills • Interstate commerce
Important Notes: • Required for businesses • Linked to PAN • Multiple registrations possible • State-specific • Digital filing mandatory
If you need to generate a GSTIN for testing purposes, here is a India GSTIN Generator