What is double materiality?
Double materiality is the EU’s distinctive approach to sustainability disclosure scope, codified in the Corporate Sustainability Reporting Directive (CSRD, Directive (EU) 2022/2464) and operationalised through the European Sustainability Reporting Standards (ESRS). A topic is “material” if it meets either of two perspectives — financial materiality (impact on enterprise value, risks/opportunities) or impact materiality (the organisation’s actual or potential impacts on people and the environment).
Two perspectives
- Financial materiality (outside-in): sustainability matters that could reasonably be expected to affect the entity’s cash flows, financial position, access to finance, or cost of capital over the short, medium or long term. Aligned with IFRS S1/S2 baseline.
- Impact materiality (inside-out): the entity’s actual or potential positive/negative impacts on people or the environment over the short, medium or long term — including its own operations and value chain.
Materiality assessment process
- Identify topics across ESRS sustainability matters (climate, pollution, water, biodiversity, circular economy, workforce, communities, consumers, business conduct).
- Engage stakeholders (workers, communities, value chain partners) to inform impact assessment.
- Assess severity, scope, irremediability for negative impacts; likelihood and magnitude for financial effects.
- Set thresholds for inclusion in mandatory disclosures.
- Document methodology — auditors test the materiality assessment.
Operationalising double materiality
Double materiality is the gate that decides what a CSRD/TSRS report must contain, which makes the assessment itself the auditable artefact: stakeholder mapping, scoring methodology, thresholds and the resulting topic list need documentation that assurance providers and, later, litigants can follow. The two failure modes are mirror images — impact-washing (declaring everything material, drowning the report) and convenient blindness (scoring away the topics the business model depends on). For Turkish subsidiaries of EU groups and TSRS-scope companies, run one assessment serving both frameworks, minute the governance sign-off, and refresh on a defined cycle; a materiality map that changes only when the law does invites exactly the scrutiny it was meant to manage.