PAN / GST / IFSC Validator

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How it is calculated

A PAN is 5 letters + 4 digits + 1 letter, where the 4th letter marks the holder type (P = individual, C = company, F = firm/LLP). A GSTIN is 15 characters — a 2-digit state code, the 10-character PAN, an entity number, the letter Z, and a final check digit computed with a base-36 Luhn algorithm, so a single mistyped character is caught. An IFSC is 4 bank letters, a 0, then a 6-character branch code. This tool checks structure and the GSTIN checksum offline; it does not confirm live registration on the government portal.

Frequently asked questions

Can I verify if a GST number is real?

This tool confirms the GSTIN is well-formed and passes its official checksum, which catches typos and fabricated numbers. To confirm the business is actively registered, check the GSTIN on the official GST portal's 'Search Taxpayer' page.

What does the 4th letter of a PAN mean?

It identifies the holder type: P = individual, C = company, H = HUF, F = firm/LLP, A = AOP, T = trust, B = body of individuals, L = local authority, J = artificial juridical person, G = government.

What is the check digit in a GSTIN?

The 15th character is a checksum computed from the first 14 characters using a base-36 modulo algorithm. If someone mistypes any character, the checksum won't match — which is how this validator flags an invalid GSTIN.

Does an IFSC always have a 0 in the middle?

Yes. The 5th character of every IFSC is always the digit 0 (reserved for future use); the first four letters are the bank code and the last six are the branch code.