Materiality assessment is the analytical foundation of every sustainability disclosure framework. Done substantively, it determines which sustainability matters an organisation actually needs to address. Done as a questionnaire, it generates a list of topics the organisation can defensibly claim to have considered. The difference matters substantively under each of the three major disclosure regimes.

What materiality assessment requires

All three of the major sustainability disclosure regimes — BRSR (India), CSRD/ESRS (EU), and IFRS S1/S2 — require some form of materiality assessment as a foundational input. The materiality concept differs between regimes, but the underlying requirement is consistent: the organisation must identify which sustainability matters are material, and disclose against those matters with depth proportionate to materiality.

The substantive expectation under all three regimes is that the assessment is a deliberate analytical exercise, not a list. The organisation should be able to demonstrate how it identified the matters considered, how it weighed them, who was involved in the assessment, what evidence informed it, and how it reached its determinations. Documentation of the assessment is part of the disclosure expectation, not just the output.

Double materiality under CSRD

CSRD/ESRS introduces the most analytically demanding materiality concept of the three regimes: double materiality. The organisation must assess each sustainability matter from two perspectives:

  • Impact materiality— the organisation's actual and potential impacts on people and the environment, considering severity, scale, scope, and irremediability over the short, medium, and long term, across the organisation's own operations and its value chain
  • Financial materiality— the actual and potential effects of sustainability matters on the organisation's financial position, performance, cash flows, access to finance, or cost of capital, over the short, medium, and long term

A matter is material under CSRD if it meets the threshold of either lens. The substantive consequence is that CSRD reporters must assess sustainability matters that affect external parties (impact materiality) even where there is no immediate financial implication for the reporter — and they must assess sustainability matters that affect their own financial position (financial materiality) even where the organisation's own impacts are limited.

The double materiality concept is the central analytical commitment of the EU's sustainability disclosure framework. It is also the dimension on which questionnaire-based materiality assessment fails most clearly — questionnaires cannot meaningfully assess severity, scale, scope, and irremediability of impacts across a complex value chain. Substantive engagement is required.

Financial materiality under IFRS S1/S2

IFRS S1 and S2 adopt a financial materiality perspective consistent with the wider IFRS framework: sustainability-related information is material if omitting, misstating, or obscuring it could reasonably be expected to influence decisions that primary users of general-purpose financial reports make. The primary user is the investor or capital provider.

Financial materiality under IFRS is broader than near-term financial impact. It includes sustainability-related risks and opportunities that may affect the entity's cash flows, access to finance, or cost of capital over the short, medium, or long term. Climate-related transition risks that may not materialise for decades can be material if they reasonably affect investor decision-making about the entity today.

The substantive analytical work under IFRS S1/S2 involves identifying the sustainability matters that could reasonably affect enterprise value over relevant time horizons; assessing the likelihood and magnitude of those effects; and disclosing with depth proportionate to materiality. The questionnaire approach fails here because likelihood and magnitude assessment requires substantive analytical engagement with each candidate matter.

Impact materiality under BRSR

BRSR Core adopts an impact-oriented materiality perspective, consistent with the framework's focus on responsible business conduct and the National Guidelines on Responsible Business Conduct (NGRBC) principles. The assessment focuses on the organisation's impact on stakeholders, communities, and the environment.

The BRSR framework does not require double materiality; reporters are not formally required to assess financial materiality alongside impact materiality. In practice, however, BRSR reporters with cross-border operations or with anticipated CSRD applicability often perform double materiality assessment voluntarily, both to inform consistent disclosure across regimes and to support enterprise risk management integration.

The stakeholder engagement question

All three regimes implicitly or explicitly require stakeholder engagement as part of materiality determination. CSRD/ESRS is the most explicit — affected stakeholders (employees, communities, consumers, value-chain workers, civil society organisations) and users of sustainability statements must be engaged in identifying material impacts. IFRS S1/S2 is somewhat narrower (focused on primary users — investors) but expects substantive engagement with users. BRSR engages stakeholder consideration through the NGRBC principles.

Stakeholder engagement in materiality assessment is where most assessments either earn their depth or reveal their thinness. Substantive engagement means actually engaging with the stakeholders affected — through interviews, focus groups, surveys, ongoing engagement channels — not deducing stakeholder views from secondary sources. The substantive engagement is operationally demanding; the deductive shortcut produces materiality assessments that read like questionnaire results.

Practical depth requirements

A substantive materiality assessment typically includes: identification of candidate sustainability matters drawn from sectoral frameworks (SASB standards, sector ESRS standards, GRI sector standards, applicable disclosure-regime taxonomies); stakeholder engagement to test those candidates against affected-party perspectives; analytical work to assess severity, scale, scope, irremediability (for impact materiality) and likelihood, magnitude, time horizon (for financial materiality); threshold-setting for materiality determination; documentation of the assessment process and outputs; periodic refresh.

The assessment is then the analytical foundation for disclosure depth: matters determined material are disclosed substantively; matters determined not material may be disclosed at lower depth or not addressed, with the assessment basis available to defend the determination.

How to do it well

The pattern that produces a substantive materiality assessment: start with sector-relevant frameworks for candidate matter identification; build a stakeholder engagement plan that engages affected parties substantively, not just representatives; allocate analytical capacity to perform the impact and financial materiality assessment for each candidate matter; document the determinations with the evidence base; refresh the assessment at a defined cadence (typically annually for active reporters; less frequently for stable contexts).

The pattern that produces a questionnaire-quality assessment: send candidate matters to selected stakeholders with a rating scale; tally responses; declare the top-scoring matters material. This approach satisfies a procedural compliance test but does not produce the substantive analytical foundation that any of the three disclosure regimes actually expects, and it leaves the organisation defenceless if assurance scope tests the materiality determination substantively.