How to identify GST number format

Each taxpayer is assigned with a state-wise PAN-based 15-digit Goods and Services Taxpayer Identification Number (GSTIN) at the time of GST registration.

This article explains how the GSTIN format can help you verify a GST number.

Registration IDs Digits
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Normal, Composite, Casual State (SS) 10 Digit PAN Number (1-9)
(Z, 1-9, A,B,E-J) Check Digit
Input Service Distributor State (SS) 10 Digit PAN Number (1-9)
S Check Digit
Tax Collector State (SS) 10 Digit PAN Number (1-9)
C Check Digit
Tax Deductor State (SS) 10 Digit PAN Number (1-9)
D Check Digit
Nonresident Foreign Taxpayers (NRI) State (SS) Year (YY) Country (CCC) 00000 N F T
UN Bodies, Embassies, etc. State (SS) Year (YY) Country (CCC) 00000 U N Check Digit
Other Notified Persons State (SS) Year (YY) Country (CCC) 00000 O N P
Tax Return Preparer State (SS) Year (YY) 00000000 T R P
Temporary ID State (SS) Year (YY) 00000000 T M P
State (SS) 2 Digit State Code
Year (YY) Last 2 Digits of the Year GSTIN was issued in (example: 17, for 2017)
Country (CCC) 3 Digit Country Code
00000 5 digit serial number per year
00000000 8 digit serial number irrespective of year

GST number format example

To help you better understand the GST number format, we present an example of a Normal tax payer GST number.

GSTIN format

Here is the format break-down of this GSTIN:

Digits Explanation
22 It represents the State Code as per Indian Census 2011. Every state has a unique code.

  • State code of Chhattisgarh is 22
  • State code of Delhi is 07
AAAAA0000AIt represents the PAN number of the taxpayer.
1 It is assigned based on the Number of registrations within a state.
Z Z is a Default.value
5 It is for Check Code. It may be an alphabet or a number.

To know more about GSTIN, please visit the article What is GSTIN?

Use our GSTIN/UIN Number Validator tool to check the format of multiple GSTIN/UIN numbers

GSTIN Validator Tool Help video should help you in using the GSTIN validator.