Guide
HSN codes on invoices: how many digits you need
If your aggregate turnover in the previous year was up to ₹5 crore, you must show at least a 4-digit HSN code on B2B invoices (optional on B2C). Above ₹5 crore, a 6-digit HSN code is required on every invoice. Services use SAC codes the same way.
Updated 29 October 2026
What HSN and SAC codes are
HSN (Harmonised System of Nomenclature) codes classify goods — for example 1006 for rice. SAC (Services Accounting Code) codes classify services — for example 998314 for IT consulting. The code decides the GST rate and is reported in GSTR-1's HSN summary.
How many digits
- Turnover up to ₹5 crore: 4 digits, required on B2B invoices, optional on B2C.
- Turnover above ₹5 crore: 6 digits on all invoices.
- Exports: 8 digits.
In HextaBook
Save the HSN or SAC code on each item once; every invoice prints it and GSTR-1's HSN summary adds it up — B2B and B2C separately, as the portal now asks.
Frequently asked questions
Where do I find the HSN code for my product?
Search the HSN directory on the GST portal (services.gst.gov.in → Search HSN/SAC), or check the code on your supplier's invoice for the same product.
Is HSN needed on a B2C bill?
Not if your turnover is up to ₹5 crore, though it's good practice. It is needed above ₹5 crore.
Read next
- How to make a GST invoice
- GSTR-1: what goes in it and how to file it
- Stock and inventory: variants, batches, serial numbers and godowns
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