How to verify a GSTIN
Before you trust a supplier's invoice — or your buyer's GSTIN — it's worth a 30-second check. Here's how and why.
A GSTIN is a 15-digit number, and not every one quoted on an invoice is valid or active. Verifying protects your input tax credit and your reputation.
How to verify
- Use the GST portal's 'Search Taxpayer' by GSTIN.
- Check the legal/trade name matches the invoice.
- Confirm the status is Active.
- Check the registration type and state code.
Why it matters
- Input credit depends on genuine, active suppliers.
- A wrong/inactive GSTIN can block your credit.
- It flags fake or copied invoices.
- It confirms B2B buyers are who they claim to be.
Read the number too
The 15 digits encode the state and PAN — see what a GSTIN is and how to read it.
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How do I check if a GSTIN is valid?
Use the GST portal's Search Taxpayer tool — confirm the name matches and the status is Active.
Why verify a supplier's GSTIN?
Your input credit depends on genuine, compliant suppliers. An invalid or inactive GSTIN can block your credit.
What does a GSTIN's structure tell me?
The 15 digits encode the state code and the PAN — useful for a quick sanity check.
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