GST HSN Code Lookup Guide: How to Find the Right Code for Your Goods

What HSN code means

HSN (Harmonised System of Nomenclature) is an internationally standardised numeric code used to classify traded goods. Under GST, every invoice must quote the HSN code (or SAC — Services Accounting Code, for services) for each item, which determines the applicable tax rate and feeds into your GSTR-1 return.

How many digits you need

The digit requirement scales with turnover: businesses with aggregate turnover up to ₹5 crore must quote a 4-digit HSN code on B2B invoices, while those above ₹5 crore must quote 6 digits. Exporters and importers generally need the full 8-digit code.

How to look up the correct code

The GST portal's HSN/SAC search tool lets you search by keyword or chapter to find the correct code and its current applicable rate — always confirm here rather than copying a code from a competitor's invoice, since a wrong code can misstate your tax liability.

Why getting it wrong is expensive

An incorrect HSN code can apply the wrong tax rate, cause GSTR-1/GSTR-3B mismatches, and block your buyer's input tax credit — all of which surface as notices later. If your product catalogue is large, a one-time GST health check to validate your HSN mapping pays for itself.

FAQs

Is HSN code the same across states? Yes — HSN codes are national and international standards, unaffected by which state you operate in.

What if my product doesn't have an obvious HSN match? Classify by material composition and primary use per the HSN chapter notes, or get a CA to confirm — misclassification is a common audit trigger.