How to verify a GST number (GSTIN) online in 30 seconds

Before you extend credit to a new customer or pay a new supplier, verify their GSTIN. A 30-second check tells you whether the number is real, active, and belongs to who they say.

Step 1: Get the 15-digit GSTIN

Ask the party for their GSTIN, or read it off their invoice. A valid GSTIN is 15 characters: 2-digit state code, 10-character PAN, and 3 check characters.

Step 2: Check the format first

The pattern is 2 digits, 5 letters, 4 digits, 1 letter, 1 letter/digit, Z, 1 letter/digit. If it does not match, it is fake before you even look it up.

Step 3: Look it up on the GST portal

Use the official 'Search Taxpayer' tool on the GST portal (or a trusted GSTIN lookup). Enter the number to see the registered legal name, trade name, status and registration date.

Step 4: Confirm status is Active

The status must show Active. Cancelled or suspended means you cannot claim input tax credit on their invoices, so treat with caution.

Step 5: Match the name and state

The registered name should match who you are dealing with, and the first two digits (state code) should match their stated location. Mismatches are a red flag.

Step 6: Save it against the contact

Store the verified GSTIN on the customer or supplier record so every future invoice carries the right number and your GST returns reconcile cleanly.

Frequently asked questions