Double materiality

Double materiality is a reporting principle requiring an organization to assess sustainability issues from two directions at once: financial materiality, how climate change, resource scarcity or social issues could affect the company's financial performance, and impact materiality, how the company's own operations affect the environment and society, regardless of whether that impact shows up in its financial statements.

This differs from the single, financial-materiality-only lens used in traditional financial reporting and in some ESG frameworks, such as the ISSB's IFRS S1/S2, which focus on what is decision-useful to investors. The EU's Corporate Sustainability Reporting Directive (CSRD) is the most prominent regime requiring double materiality, and a company doing a CSRD materiality assessment scores each topic on both axes and discloses anything material on either one.

Double materiality shapes which topics an organization's ESG reporting must cover in depth, including scope 1, 2 and 3 emissions and results from climate scenario analysis or climate value-at-risk work. The main pitfall is conducting a materiality assessment that is really only financial materiality relabeled, skipping genuine stakeholder consultation on real-world impact, which produces a disclosure that looks compliant but misses the impact side the standard actually requires.