HSN summary in GSTR-1: how to fill it correctly
The HSN summary is where invoice-level codes roll up. Get it right and your GSTR-1 sails through.
GSTR-1 includes an HSN-wise summary of your outward supplies. It must reconcile with the HSN codes on your invoices, so consistency from invoice to summary is everything.
What the summary needs
- HSN code for each product group (at the required digit level).
- Total quantity and value per HSN.
- Taxable value and tax amounts (CGST/SGST/IGST).
- Unit of measure (UQC).
Digit requirements
The number of HSN digits depends on turnover — 4 digits up to ₹5 crore, 6 digits above. See HSN on invoices for the full rule. Use the HSN Code Finder to lock codes per product.
Keeping it matched
- Assign one HSN per SKU and reuse it everywhere.
- Roll invoice lines into HSN groups for the summary.
- Check totals tie to your GSTR-1 invoice data.
- Fix any mismatch before filing.
Why it matters
HSN mismatches are a frequent trigger for scrutiny notices. A clean, consistent summary keeps your filings boring — which is exactly what you want.
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How many HSN digits in the GSTR-1 summary?
Four digits up to ₹5 crore turnover, six digits above. Exports need eight.
Why must the HSN summary match invoices?
Because the department reconciles them. Differences between invoice HSN and the summary can trigger notices.
How do I avoid HSN errors?
Assign one verified HSN per product (via the HSN Code Finder) and reuse it across invoices and the summary.
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