19 March 2026
No, e-invoicing is not mandatory for exempt supplies, even when both the supplier and the buyer are registered under GST (a B2B transaction). E-invoicing is not required for exempt B2B supplies. The e-invoicing system only applies to Tax Invoices, whereas exempt supplies legally require a Bill of Supply. If you are making an exempt B2B supply, simply issue a standard Bill of Supply without an IRN.