Double Materiality
Double materiality is the assessment framework required by the EU's CSRD that evaluates sustainability topics from two perspectives: impact materiality (how the company affects society and the environment) and financial materiality (how sustainability issues affect the company's financial performance, position, and cash flows).
Double materiality is a distinguishing feature of the EU's sustainability reporting approach. Traditional financial materiality — used by the SEC, ISSB, and most US frameworks — asks only whether a sustainability issue could affect the company's financial performance. Impact materiality adds the reverse question: could the company's operations affect society and the environment, regardless of whether that impact bounces back to the bottom line?
Under CSRD/ESRS, companies must conduct a double materiality assessment (DMA) for each of the ten ESRS topics before determining reporting obligations. A topic is material — and therefore subject to full disclosure — if it meets either the impact or financial threshold.
In practice, this means most large companies will find climate change (E1) and own workforce (S1) material from both perspectives. Topics like biodiversity (E4) or affected communities (S3) may be material from an impact perspective even if the financial effects are indirect or long-term.
The DMA process involves stakeholder engagement, value chain mapping, scenario analysis, and governance sign-off. It must be refreshed periodically and documented in the sustainability report.
Frequently asked questions
What is double materiality? +
Double materiality assesses sustainability topics from two angles: impact materiality (how the company affects society and the environment) and financial materiality (how sustainability issues affect the company's finances). The EU's CSRD requires this dual assessment.
How does double materiality differ from single materiality? +
Single materiality (used by ISSB and SEC) only asks whether a sustainability issue affects company finances. Double materiality adds the reverse: whether the company impacts society and environment, regardless of financial feedback effects. This broader lens captures more disclosure topics.
Related terms
CSRD (Corporate Sustainability Reporting Directive)
The Corporate Sustainability Reporting Directive (CSRD) is the European Union's mandatory sustainability reporting law. It requires companies operating in the EU above certain thresholds to disclose environmental, social, and governance (ESG) information according to the European Sustainability Reporting Standards (ESRS), with third-party assurance.
ESRS (European Sustainability Reporting Standards)
ESRS are the detailed reporting standards developed by EFRAG that specify what companies must disclose under the EU's CSRD. They cover ten sustainability topics across environmental, social, and governance dimensions, with ESRS E1 (Climate Change) requiring detailed emissions data, transition plans, and climate risk assessments.
TCFD (Task Force on Climate-related Financial Disclosures)
TCFD is a framework developed by the Financial Stability Board for disclosing climate-related financial risks and opportunities. It organizes recommendations around four pillars: governance, strategy, risk management, and metrics and targets. Though the TCFD disbanded in 2023, its framework lives on through ISSB S2 and CSRD/ESRS.
Carbon Accounting
Carbon accounting is the systematic process of measuring, recording, and reporting the greenhouse gas (GHG) emissions produced by an organization, product, or activity. It follows standardized methodologies — most commonly the GHG Protocol — to quantify emissions across Scope 1 (direct), Scope 2 (purchased energy), and Scope 3 (value chain) categories, producing an auditable inventory that underpins disclosure, reduction planning, and regulatory compliance.