Double materiality is the principle that a company must assess sustainability topics through two lenses: impact materiality, meaning the company’s effects on people and the environment, and financial materiality, meaning how sustainability issues affect the company’s own performance and value. A topic is reportable if it is material from either perspective.
Why It Matters for Manufacturers
The double materiality assessment is the scoping mechanism for the entire CSRD report. It determines which ESRS standards a company must apply.
For manufacturers, the impact lens almost always pulls in climate, pollution, water and resource use, because those impacts happen on the factory floor and in the supply chain rather than in an office.
The assessment is also auditable. Assurance providers examine the process and evidence behind it, so it needs to be grounded in operational data rather than a desk review of policies.
U.S. and EU Applicability
Double materiality is an EU concept, mandated by CSRD and embedded in ESRS. The contrast matters for U.S. manufacturers: ISSB standards and California’s laws take a financial-materiality or prescriptive approach, so a company can be required to report a topic in the EU that no U.S. regime would touch. U.S. manufacturers in CSRD scope must run the assessment. Those outside scope encounter it through EU customers’ value chain questions.