The Central Board of Indirect Taxes and Customs (CBIC), vide Notification No. 04/2026–Central Tax dated 26 October 2026, has introduced an important amendment to the GST e-invoicing framework by extending its applicability to certain recipient-generated self-invoices issued under the Reverse Charge Mechanism (RCM). The amendment, which will come into effect from 1 January 2027, is aimed at bringing specified RCM transactions within the ambit of the e-invoicing mechanism.
This development will have a significant impact on businesses covered under the existing e-invoicing provisions, particularly in relation to purchases from unregistered suppliers and import of services. Accordingly, businesses will need to revisit their existing purchase-side accounting, self-invoicing and GST compliance processes to ensure timely compliance with the revised requirements.
- What is the Key Change?
Under the existing GST e-invoicing framework, the requirement to generate an Invoice Reference Number (IRN) primarily applies to specified B2B supplies and exports.
With the issuance of the above notification, the scope of e-invoicing is being expanded to cover certain self-invoices generated by registered recipients in respect of the following transactions:
- Purchases from unregistered suppliers: Supplies received from unregistered persons where GST is payable by the registered recipient under the Reverse Charge Mechanism (RCM).
- Import of services: Services received from suppliers located outside India where the registered recipient is liable to discharge GST under RCM.
Consequently, registered recipients covered under the existing e-invoicing provisions will also be required to obtain an IRN for such self-invoices, subject to the prescribed conditions and exemptions.
This marks an important shift in the e-invoicing compliance framework, as the requirement will now extend to specified recipient-generated invoices in addition to supplier-generated invoices.
- Applicability and Turnover Threshold
The extended e-invoicing requirement will apply to registered taxpayers whose aggregate turnover has exceeded ₹5 crore in any preceding financial year from FY 2017–18 onwards, subject to the exemptions available under the existing e-invoicing provisions.
It is important to note that the latest notification does not introduce any change in the existing turnover threshold of ₹5 crore. Instead, it expands the categories of transactions for which IRN generation will be required for taxpayers already covered under the e-invoicing framework.
Accordingly, businesses should evaluate their applicability based on their aggregate turnover history and the existing exemption provisions.
- Introduction of New Supply Types – RCMDOM and RCMIMP
To facilitate reporting of the newly covered transactions under the e-invoicing framework, two additional supply types are being introduced.
| Supply Type | Description |
| RCMDOM | Recipient-generated self-invoices for specified domestic supplies received from unregistered persons, where the registered recipient is liable to pay GST under RCM. |
| RCMIMP | Recipient-generated self-invoices for import of services from suppliers located outside India, where the registered recipient is liable to pay GST under RCM. |
These new supply types will enable the appropriate identification and reporting of recipient-generated self-invoices on the Invoice Registration Portal (IRP).
Businesses will therefore need to ensure that their invoicing systems and ERP platforms are appropriately configured to identify the nature of the transaction and select the relevant supply type while generating IRNs.
- Key Action Points for Businesses
In view of the upcoming implementation, businesses should proactively assess the impact of this amendment on their existing accounting and GST compliance processes.
The following key areas require attention:
- Identification of RCM Transactions
Businesses should undertake a detailed review of their purchase transactions to identify supplies attracting GST under RCM, particularly purchases from unregistered suppliers and import of services.
- Review of Self-Invoicing Procedures
Existing procedures for issuing self-invoices under RCM should be reviewed to ensure that the invoicing process is aligned with the extended e-invoicing requirements.
- ERP and Accounting System Readiness
Businesses should evaluate whether their existing accounting software and ERP systems can support IRN generation for recipient-generated self-invoices and capture the additional information required for reporting.
- Integration with the Invoice Registration Portal
Necessary changes should be identified and implemented to facilitate seamless integration with the IRP for IRN generation, including appropriate testing of the revised invoicing workflows.
- Incorporation of New Supply Types
The new supply types, namely RCMDOM and RCMIMP, should be incorporated into the relevant invoicing configurations, accounting processes and internal compliance procedures to ensure accurate transaction classification.
- Implementation Readiness and GSTN Advisory
The Goods and Services Tax Network (GSTN), through its advisory dated 16 October 2026, has announced the availability of sandbox testing for this facility.
The availability of the sandbox environment provides businesses and technology service providers with an opportunity to evaluate the functionality, test system integrations and identify potential implementation challenges before the actual rollout.
Businesses should actively monitor further communications and advisories issued by GSTN regarding the production rollout, technical specifications and operational requirements.
Early testing and validation will be particularly important for organisations having high volumes of RCM transactions and complex ERP environments.
- Our Recommendations
Although the amendment is scheduled to become effective from 1 January 2027, businesses should not defer their preparation until the effective date.
We recommend that businesses initiate a structured impact assessment and implementation exercise well in advance, with particular focus on the following:
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- Conduct a comprehensive review of existing RCM transactions, including purchases from unregistered suppliers and import of services.
- Evaluate the applicability of the extended e-invoicing requirement based on the existing turnover threshold and exemption provisions.
- Review and strengthen existing self-invoicing procedures.
- Assess the need for modifications to ERP, accounting and invoicing systems to facilitate IRN generation.
- Undertake sandbox testing and validate integration with the IRP.
- Establish appropriate internal controls to ensure timely and accurate generation of IRNs for the newly covered transactions.
- Conclusion
The extension of GST e-invoicing to specified recipient-generated self-invoices represents a significant development in the GST compliance framework. By bringing domestic RCM transactions involving unregistered suppliers and imports of services within the e-invoicing mechanism, the amendment seeks to enhance transaction-level reporting and strengthen compliance.
For businesses already covered under the e-invoicing provisions, the change will require attention not only from the GST and tax teams but also from finance, accounts, procurement and IT functions.
Timely assessment, appropriate system modifications and effective coordination between the relevant departments will be essential to ensure a smooth transition and avoid last-minute compliance challenges ahead of 1 January 2027.
We recommend that businesses undertake an early review of their existing RCM transactions, self-invoicing practices and import-of-services arrangements to assess the implications of this amendment and ensure complete implementation readiness.
