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) (A-Z) |
(Z, 1-9, A,B,E-J) | Check Digit | ||||||||||
| Input Service Distributor | State (SS) | 10 Digit PAN Number | (1-9) (A-Z) |
S | Check Digit | ||||||||||
| Tax Collector | State (SS) | 10 Digit PAN Number | (1-9) (A-Z) |
C | Check Digit | ||||||||||
| Tax Deductor | State (SS) | 10 Digit PAN Number | (1-9) (A-Z) |
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.

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.
eg.,
- State code of Chhattisgarh is 22
- State code of Delhi is 07
AAAAA0000A It 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.
