GST e-Invoicing for Exporters in 2026: Current Threshold & 30-Day IRP Rule

E-invoicing under GST has quietly expanded to cover a huge share of India's exporting businesses. If your turnover has grown in the last couple of years, it's worth confirming whether you're now required to generate e-invoices — because getting this wrong doesn't just risk a penalty, it can invalidate your export invoice entirely.

The Current e-Invoicing Threshold

As of 2026, e-invoicing is mandatory for any GST-registered business whose aggregate annual turnover has exceeded ₹5 crore in any financial year since GST was introduced — not just your current year's turnover. This is a crucial detail: once your turnover crosses ₹5 crore in any single year, the obligation applies going forward permanently, even if turnover dips in a later year. The threshold applies on a PAN basis, meaning it covers your total business turnover across all GST registrations under that PAN.

Does This Apply to Export Invoices Too

Yes. E-invoicing covers B2B, export, SEZ, and deemed-export supplies once you cross the threshold — it isn't limited to domestic B2B transactions. Export invoices are tagged with a supply type of EXPWP (export with payment of tax) or EXPWOP (export without payment of tax), with shipping bill details captured separately in the invoice data.

The 30-Day IRP Reporting Rule for Larger Exporters

If your aggregate turnover is ₹10 crore or more, a stricter rule applies: you must report your invoice to the Invoice Registration Portal (IRP) within 30 days of the invoice date, or the IRP will refuse to generate an Invoice Reference Number (IRN) for it. A missed deadline isn't a minor inconvenience — without a valid IRN, the invoice isn't considered legally valid, which can directly block a GST refund claim on zero-rated exports that depends on that invoice.

What Happens If You Don't Comply

• Non-compliant invoices can attract a penalty of ₹10,000 per invoice
• The buyer cannot claim Input Tax Credit on an invoice without a valid IRN
• For exporters, a missing or rejected IRN can cascade into problems with GSTR-1 reporting and refund claims on zero-rated supplies
• e-Invoices can only be cancelled on the IRP within 24 hours of generation — after that, a credit note is the only way to reverse it

Getting Ready If You've Just Crossed the Threshold

If your business has recently crossed ₹5 crore turnover for the first time, preparation typically takes 2 to 4 weeks: enabling the e-invoice API on the GST portal, configuring your accounting software or a GST Suvidha Provider (GSP) tool, cleaning up HSN codes and customer GSTIN master data, and running test invoices on the sandbox before going live.

The threshold has been lowered progressively since e-invoicing began in 2020 — starting at ₹500 crore and stepping down to today's ₹5 crore — so businesses hovering near the limit should assume further tightening is possible and get their systems export-ready in advance rather than scrambling after crossing it.