Context
The growing importance of environmental, social and governance (ESG) disclosures has increased the need for sustainability information that can be examined systematically. However, such information may involve estimates, assumptions, different measurement methodologies and data from multiple sources, creating challenges for consistency and comparability.
Recent Developments in India
- The Institute of Chartered Accountants of India (ICAI), through its Sustainability Reporting Standards Board (SRSB), issued the Exposure Draft of SSA-5000 — General Requirements for Sustainability Assurance Engagements on 20 May 2026 for public comments.
- SSA-5000 is being formulated in alignment with the international ISSA 5000, while taking the Indian context into account. ICAI has also issued an Exposure Draft of the Framework for Sustainability Assurance Engagements.
- The International Auditing and Assurance Standards Board (IAASB) issued the final ISSA 5000 in November 2024. Its September 2026 jurisdictional update places India under “Adoption In Progress” for ISSA 5000 or an equivalent local standard. Thus, SSA-5000 remains at the Exposure Draft/formulation stage in India.
Sustainability Assurance
- Sustainability reporting covers an organisation’s environmental, social and governance information, including:
- greenhouse gas emissions;
- energy and water use;
- waste;
- biodiversity;
- workforce indicators; and
- governance-related parameters.
Such information may be based on different methodologies, estimates, assumptions and external sources.
- Sustainability assurance involves the independent examination of reported sustainability information and the evidence supporting it.
Key Features of ISSA 5000
Principles-Based Framework: ISSA 5000 is a stand-alone, principles-based framework applicable across sustainability topics and reporting frameworks.
Levels of Assurance
- Limited assurance: Involves less extensive procedures and provides a lower level of assurance.
- Reasonable assurance: Involves more extensive procedures and provides a higher level of assurance.
Materiality
- Materiality helps determine sustainability information relevant to intended users and may involve qualitative as well as quantitative considerations.
- Where required by applicable reporting requirements, double materiality may also be considered.
- Professional Applicability
- The framework is intended for professional accountants and other qualified assurance practitioners.
Addressing Greenwashing
Greenwashing refers to misleading, exaggerated or selectively favourable representations of environmental or sustainability performance.
Assurance engagements can examine:
- reported data and supporting evidence;
- measurement methodologies;
- assumptions underlying disclosures;
- reporting boundaries; and
- material omissions or misstatements.
They can also consider relevant information from the value chain, particularly where sustainability performance depends on activities outside the reporting entity.
This can help identify unsupported or potentially misleading sustainability claims.
However, sustainability assurance is not a standalone anti-greenwashing regulatory regime. Its function is to provide assurance over sustainability information and the evidence supporting it.
Significance
- Corporate Accountability: External assurance can encourage organisations to establish formal processes for preparing and documenting sustainability information.
- Decision-Making: Assured sustainability information can provide intended users with an additional basis for economic and governance-related decisions.
- Professional Ecosystem: The development of sustainability assurance creates demand for expertise in accounting, assurance, environmental sciences, technology and sustainability regulation.
Challenges and Way Forward
| Challenge | Way Forward |
| Complex value chains: Information may originate from multiple suppliers and external entities, making collection and validation difficult. | Establish clear responsibilities for data collection, validation and documentation across relevant participants. |
| Methodological diversity: Different measurement approaches can limit comparability. | Promote greater consistency in measurement methodologies and reporting boundaries. |
| Forward-looking commitments: Net Zero and other future commitments depend on technologies, investments, policies and business decisions that have not yet occurred. | Clearly disclose the assumptions and uncertainties underlying such commitments. |
| Multidisciplinary requirements: Sustainability assurance extends beyond conventional financial reporting and auditing. | Strengthen specialised training and multidisciplinary capacity. |
| Implementation burden: Assurance may require additional personnel, technology, data systems and processes. | Adopt a proportionate implementation approach based on organisational size, complexity and reporting capacity. |
| Professional objectivity: Assurance quality depends on objective assessment of sustainability information. | Maintain professional independence and scepticism and strengthen coordination among ICAI, regulators, reporting entities and assurance practitioners. |
Conclusion
SSA-5000 represents a move towards a structured approach to sustainability assurance in India. Its implementation will determine how effectively sustainability disclosures can be subjected to systematic assurance while accommodating differences in organisational capacity and reporting complexity.
FAQs
Q1. From which reporting periods is ISSA 5000 applicable?
Unless otherwise specified, ISSA 5000 applies to sustainability assurance engagements for periods beginning on or after 15 December 2026, or another specified date on or after that date, as applicable under the standard.
Q2. Is early application of ISSA 5000 permitted?
Yes. The standard permits early application, subject to the applicable requirements governing the assurance engagement.
