Question:

How many digits are there in GST identification number ?

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GSTIN = 2-digit State code + 10-character PAN + 3 more characters.
Updated On: Oct 19, 2026
  • 15
  • 14
  • 13
  • 10
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The Correct Option is A

Solution and Explanation

Step 1: Understanding the Concept:
GSTIN stands for Goods and Services Tax Identification Number. Every registered taxpayer gets one unique number.

Step 2: Structure of GSTIN.
GSTIN has 15 characters in total. They are built from these parts.
First 2 digits: State code.
Next 10 characters: PAN of the taxpayer.
13th character: Number of registrations in the same State on one PAN.
14th character: The letter Z by default.
15th character: A check code.
Total: 2 + 10 + 1 + 1 + 1 = 15.

Step 3: Why the other options are wrong.
10 is the length of a PAN, not a GSTIN. 13 and 14 are only partial counts of the GSTIN characters.

Final Answer:
GSTIN has 15 characters, which is option (A).
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