What is E-Invoice?
E-invoicing under GST does not mean simply emailing a PDF. It is a system in which a business uploads the details of each eligible invoice, in a standard format, to the Invoice Registration Portal (IRP). The portal validates the data, generates a unique Invoice Reference Number (IRN), digitally signs the invoice and returns a QR code. Only after this does the invoice count as validly issued for those who are covered.
Coverage depends on aggregate annual turnover. The threshold has been lowered in stages since e-invoicing began in 2020, and at the time of writing it stood at ₹5 crore. Check the current notification or ask your CA whether your business is covered.
Why it matters for exporters
If your business is covered by e-invoicing, export invoices generally need to be reported to the IRP as well, not just domestic B2B invoices. The IRN and QR code then appear on the export invoice you send abroad. Because the e-invoice data also feeds your GSTR-1, a correctly reported e-invoice helps your export show up properly for GST refund purposes.
E-invoicing is a GST matter. The EDF is a separate FEMA declaration and does not change your GST obligations. Your EDF simply records the same invoice number, date, currency and amount, so make sure the invoice you report on the IRP and the invoice you list in Part 2B of the EDF are the same document.
Example
Vertex Cloud Services Pvt Ltd has turnover above the e-invoicing threshold. On 20 October 2026 it raises an export invoice for USD 18,000 to an Australian client under LUT. Its accounting software pushes the invoice to the IRP, receives an IRN and QR code, and prints both on the PDF. The same invoice number goes into Vertex's October EDF, due by 30 November 2026.
Common confusion
An e-invoice is not the same as an e-way bill, which relates to moving goods. Nor is any PDF invoice an "e-invoice". For exporters' specifics, see e-invoicing and export invoices. This is general information, not tax advice.