What is the turnover threshold for mandatory GST e-invoicing in 2026?

E-invoicing is mandatory for any registered business whose Aggregate Annual Turnover (AATO) exceeded ₹5 Crores in ANY financial year from FY 2017-18 onwards.

What is the 'Once Applicable, Always Applicable' rule under e-invoicing?

If your PAN-India turnover exceeded ₹5 Cr in any single year since 2017-18, e-invoicing remains mandatory permanently, even if current turnover drops below ₹5 Cr.

What is the 30-day e-invoice reporting rule?

Taxpayers with AATO of ₹10 Crores and above must upload invoice data to the IRP portal and generate an IRN within 30 days of the invoice date.

Which entities are exempt from mandatory e-invoicing regardless of turnover?

Banks, NBFCs, Insurance companies, GTAs (Goods Transport Agencies), Passenger Transport Services, Multiplex Cinemas, and SEZ Units.

E-Invoicing Applicability & Turnover Thresholds (2026 GST Guide)

Quick Summary: Who Is Mandated to Generate E-Invoices under GST?

E-invoicing (IRN & QR code generation) is mandatory for all registered businesses with PAN-India turnover > ₹5 Crores in any financial year from 2017-18 onwards. It covers B2B, Exports, B2G, and SEZ supplies. Taxpayers with AATO >= ₹10 Cr must report invoices to IRP within 30 days of invoice date.

Turnover Mandate: Aggregate Annual Turnover (AATO) > ₹5.00 Crores (PAN-wide).
Rule of Persistence: 'Once Applicable, Always Applicable' rule governs e-invoices.
30-Day Limit: Mandatory 30-day IRP reporting cutoff for AATO >= ₹10 Crores.
Invalid Without IRN: Invoices missing IRN/QR code are legally invalid under Section 122.

1. E-Invoicing Turnover Threshold Phase Matrix

The government phased in e-invoicing starting at ₹500 Cr down to the current ₹5 Cr mandate:

Implementation Phase	Turnover Threshold (AATO)	Effective Enforcement Date
Phase 1 & 2	Exceeding ₹500 Cr / ₹100 Cr	Oct 2020 / Jan 2021
Phase 3 & 4	Exceeding ₹50 Cr / ₹20 Cr	Apr 2021 / Apr 2022
Phase 5 & 6 (Current)	Exceeding ₹10 Cr / ₹5 Cr	Oct 2022 / Aug 2023 (Mandatory 2026)

2. List of Exempt Entities & Self-Declaration

The following sectors are exempt from generating e-invoices, regardless of turnover:

Banking Companies, Financial Institutions & NBFCs
Insurance Companies
Goods Transport Agencies (GTAs) supplying goods transport by road
Passenger Transport Service Providers
Multiplex Cinema Admission Ticket Issuers
SEZ Units (Note: SEZ Developers are NOT exempt)

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