What is Double Materiality?
The CSRD framework requiring companies to assess both their impact on sustainability topics and how sustainability topics affect their financial performance — two independent assessments that together determine the scope of ESRS disclosure obligations.
Definition
Double materiality is the framework under CSRD and ESRS that requires companies to assess sustainability topics from two independent perspectives: impact materiality (how the company affects people and the environment through its operations and value chain) and financial materiality(how sustainability risks and opportunities affect the company's financial performance and prospects). A topic can be material from one or both dimensions — disclosure obligations follow from material topics.
The two dimensions explained
Impact Materiality
The outward lens. How does the company affect people, communities, and the environment through its own operations, products, services, and value chain?
- • Actual negative impacts (e.g. GHG emissions, labour conditions)
- • Potential negative impacts (e.g. supply chain risks)
- • Actual positive impacts (e.g. jobs created, services provided)
- • Potential positive impacts
Financial Materiality
The inward lens. How do sustainability risks and opportunities affect the company's financial performance, cashflows, access to finance, or cost of capital?
- • Physical risks (e.g. climate-related asset exposure)
- • Transition risks (e.g. carbon pricing, regulatory change)
- • Opportunities (e.g. new markets, efficiency gains)
- • Reputational and relationship risks
Double vs single materiality
| Framework | Materiality type | Primary audience |
|---|---|---|
| CSRD / ESRS | Double materiality | Investors + broader stakeholders |
| ISSB / IFRS S1–S2 | Single (financial) | Investors only |
| GRI Standards | Impact materiality | Broader stakeholders |
| TCFD | Financial (climate) | Investors, lenders |
| SEBI BRSR | Impact + limited financial | Regulators, investors |
Frequently asked questions
What is double materiality?
Double materiality is the CSRD and ESRS framework for determining which sustainability topics a company must disclose. It requires assessment from two angles: impact materiality (how the company affects people and the environment through its own operations and value chain) and financial materiality (how sustainability risks and opportunities affect the company financially). Both dimensions must be assessed independently, and a topic is material if it meets the threshold for either or both.
What is the difference between impact materiality and financial materiality?
Impact materiality looks outward: it asks whether the company has actual or potential, positive or negative impacts on sustainability topics — people, communities, ecosystems, climate. Financial materiality looks inward: it asks whether sustainability topics create risks or opportunities that could affect the company's financial performance, cashflows, access to finance, or cost of capital. These are genuinely different assessments requiring different evidence and stakeholder inputs.
What is the difference between double materiality and single materiality?
Single materiality (used in financial reporting and standards like SASB) assesses sustainability topics only from the perspective of what matters to investors — i.e., the financial impact on the company. Double materiality adds the impact perspective: what the company does to the world, not just what the world does to the company's finances. This is what makes CSRD significantly more comprehensive than prior non-financial reporting frameworks.
How do you conduct a double materiality assessment?
A double materiality assessment typically involves: (1) identifying a long list of sustainability topics relevant to your sector and value chain using ESRS topic lists as a starting point; (2) assessing impact materiality by evaluating the severity (scale, scope, irremediability) and likelihood of your impacts for each topic; (3) assessing financial materiality by evaluating the significance of financial risks and opportunities; (4) conducting stakeholder consultation to inform both assessments; (5) applying thresholds to determine material topics; (6) mapping material topics to ESRS disclosures. The assessment must be documented and approved at board level.
Is double materiality required under standards other than CSRD?
Double materiality as a formal requirement is specific to CSRD and ESRS. The GRI Standards use a concept called 'impact materiality' that aligns to the impact materiality dimension of CSRD. ISSB/IFRS S1 and S2 use single materiality (enterprise/financial materiality only). The TNFD also uses a concept of double materiality. Understanding which materiality framework applies to your reporting obligations is therefore important for planning and resource allocation.
CSRD Advisory
We support double materiality assessments including process design, stakeholder engagement, ESRS mapping, and board approval preparation.
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