Learn how to run a double materiality assessment for CSRD/ESRS: scope, stakeholders, scoring and documentation to make ESG priorities defensible.
Abstract
Double materiality is the principle that determines which sustainability topics companies must disclose under the Corporate Sustainability Reporting Directive (CSRD) and the European Sustainability Reporting Standards (ESRS). Rather than reporting on every possible ESG topic, companies are expected to identify those that are truly relevant from both an impact and a financial perspective.
This article explains how double materiality works in practice and how organisations can approach the assessment process step by step, from identifying potential ESG issues to prioritising them, documenting the methodology and integrating results into governance and strategy.
Key Takeaways
-
Double materiality determines which ESG topics companies must disclose under ESRS.
-
The assessment combines two perspectives: environmental and social impacts, and financial risks or opportunities.
-
A structured process helps companies prioritise ESG topics and avoid unnecessary complexity.
-
Documentation and governance are essential to ensure transparency and assurance readiness.
-
Materiality is not only a reporting step; it helps shape ESG strategy, risk management and decision-making.
What double materiality means under the CSRD framework
Double materiality is a central concept in the European sustainability reporting architecture. Under the Corporate Sustainability Reporting Directive (CSRD) and the European Sustainability Reporting Standards (ESRS), companies are expected to assess sustainability topics from two complementary perspectives.
-
The first perspective concerns impact materiality. Companies must consider how their activities affect the environment and society, including issues such as climate change, biodiversity, labour conditions or human rights in the value chain.
-
The second perspective concerns financial materiality. Sustainability topics may also become material when they influence the financial performance, position or future cash flows of a company. Climate transition risks, resource scarcity or regulatory developments are common examples.
This dual perspective reflects a broader evolution in sustainability reporting. Traditional financial materiality focused primarily on how external factors influence a company. The European approach recognises that companies themselves generate environmental and social impacts that may also become relevant for stakeholders, regulators and financial markets.
The double materiality principle was formally embedded in the Delegated Regulation (EU) 2023/2772 adopting the ESRS, published in the Official Journal of the European Union in December 2023. Since then, it has become the key mechanism determining which disclosure requirements apply to a given organisation.
In practice, double materiality functions as a filter. It ensures that sustainability reporting remains focused on the topics that genuinely matter, rather than becoming an exercise in reporting every possible indicator.
Why materiality determines what companies must report
Under ESRS, companies are not expected to disclose information on every environmental, social or governance topic covered by the standards. Instead, disclosure requirements apply only to those topics that are considered material through the double materiality assessment.
This has important implications for reporting processes. The outcome of the materiality assessment directly influences:
-
which ESRS topical standards apply
-
which indicators must be monitored
-
which policies, actions and targets must be disclosed
For this reason, regulators emphasise that the assessment must be structured and well documented. According to the European Commission and EFRAG implementation guidance, companies should be able to explain how sustainability topics were identified, evaluated and prioritised.
This requirement reflects a broader shift in corporate reporting. Sustainability information is increasingly expected to be produced with the same discipline as financial information. Clear methodologies, documented assumptions and governance oversight therefore play an important role.
The assessment process also has practical benefits beyond compliance. By systematically analysing ESG risks and impacts, companies often gain a clearer understanding of how sustainability issues intersect with operations, supply chains and long-term strategy.
Step 1: Identify potential ESG topics
The starting point of a double materiality assessment is the identification of potential sustainability topics that may be relevant for the company.
A common approach is to begin with a broad universe of ESG issues derived from multiple sources. These may include the ESRS topical standards themselves, sector-specific sustainability frameworks, regulatory guidance and internal risk assessments.
Companies also frequently consider external reference points such as the Sustainability Accounting Standards Board (SASB) sector standards, the Global Reporting Initiative (GRI) framework and scientific assessments produced by organisations like the Intergovernmental Panel on Climate Change (IPCC).
The objective at this stage is not prioritisation but completeness. Companies should ensure that the initial list captures environmental, social and governance topics that could potentially be relevant across the value chain.
Value chain analysis is particularly important. According to EFRAG guidance, companies should consider not only their own operations but also upstream and downstream activities where significant impacts or risks may arise. In sectors with complex supply chains, issues such as labour conditions, resource use or product lifecycle impacts may become relevant even when they occur outside direct operational control.
This initial mapping creates the foundation for the analytical stages that follow.
Step 2: Assess impacts, risks and opportunities
Once the universe of potential topics has been defined, the next step is evaluating their relevance.
Impact materiality typically considers the severity and likelihood of environmental or social impacts. Severity may include factors such as scale, scope and the potential for irreversible harm. These concepts are widely used in international frameworks, including the UN Guiding Principles on Business and Human Rights.
Financial materiality, on the other hand, focuses on how sustainability issues may affect business performance. Climate transition policies, resource price volatility, supply chain disruptions or changes in consumer expectations are common drivers.
In recent years, financial regulators have increasingly recognised the economic relevance of these risks. For example, the Network for Greening the Financial System (NGFS) and several central banks have highlighted how climate-related risks can influence financial stability and long-term asset values.
Companies therefore often analyse financial materiality through existing risk management frameworks. Scenario analysis, risk registers and strategic planning processes may already capture elements relevant to sustainability.
The purpose of this stage is to develop a structured evaluation of each potential ESG topic. This analysis provides the basis for prioritisation.
Step 3: Prioritise material issues
Following the assessment phase, companies need to determine which sustainability topics are ultimately considered material.
Prioritisation typically involves a scoring methodology that combines the two dimensions of materiality. Topics that score highly from either perspective, impact or financial relevance, may be considered material under ESRS.
Many organisations visualise the results using a materiality matrix, although the ESRS do not require a specific format. The key requirement is that the prioritisation logic is transparent and consistent.
Governance also plays an important role at this stage. The outcome of the assessment should be validated through internal oversight mechanisms. Sustainability teams usually work alongside functions such as risk management, finance, procurement or compliance to review the results.
Board-level or executive-level oversight may also be involved, particularly where sustainability issues intersect with strategic risks or regulatory obligations.
The result of this process is a focused list of ESG topics that guide reporting, monitoring and internal decision-making.
Step 4: Document the methodology
A defining feature of CSRD-aligned reporting is the expectation that companies explain not only what they disclose, but also how they arrived at those disclosures.
For double materiality, this means documenting the methodology used to identify, evaluate and prioritise sustainability topics.
Documentation typically covers several elements:
-
sources used to identify ESG issues
-
scoring methodologies and evaluation criteria
-
internal governance and validation processes
-
assumptions and limitations in the analysis
This documentation becomes particularly important when sustainability reporting is subject to external assurance. Under the CSRD framework, companies are required to obtain at least limited assurance on sustainability information, with the possibility of more extensive assurance requirements in the future.
Clear documentation therefore supports both transparency and operational efficiency. When methodologies are recorded and applied consistently, subsequent reporting cycles become easier to manage.
Mini-checklist: starting a double materiality assessment
-
Identify a comprehensive list of potential ESG topics.
-
Evaluate environmental and social impacts across the value chain.
-
Assess financial risks and opportunities linked to sustainability issues.
-
Prioritise topics using a transparent and documented methodology.
-
Ensure governance oversight and integrate results into reporting and strategy.
Explore related ESG Guides
To continue building an ESRS-ready system, from data foundations to reporting execution, you may find these ESG Guide articles useful:
-
ESG beyond compliance: governance in a fragmented climate era: Why strong governance, reliable ESG data and structured reporting processes are becoming increasingly important as global sustainability frameworks evolve.https://www.synesgy.com/en/esg-guide/esg-beyond-compliance-governance-in-fragmented-climate-era/
-
CSRD reporting: what you need to know nowadays: An overview of CSRD requirements and how to prepare structured, consistent disclosures.https://www.synesgy.com/en/esg-guide/csrd-reporting-what-you-need-to-know-nowadays/
-
ESRS explained: what companies must report and how to prepare: A practical overview of how ESRS translate CSRD requirements into operational reporting processes. https://www.synesgy.com/en/esg-guide/esrs-readiness-how-to-prepare/
-
Materiality assessment: 5 ways tools will support your business: How digital tools make materiality more structured, repeatable and easier to manage across functions.https://www.synesgy.com/en/esg-guide/materiality-assessment-5-ways-tools-will-support-your-business/
FAQ
What does double materiality mean in practice?Double materiality means evaluating sustainability topics from two perspectives: how a company’s activities impact the environment and society (impact materiality) and how sustainability issues may affect the company’s financial performance, position or future cash flows (financial materiality).
Why does the double materiality assessment determine what companies must report under ESRS? Because ESRS disclosure requirements apply only to topics considered material. The outcome of the double materiality assessment determines which sustainability topics must be reported, which indicators need to be monitored and which policies, actions and targets must be disclosed.
What should companies do before starting ESG data collection? Before collecting ESG data, companies should define their reporting scope and boundaries. This means clarifying which entities, activities and parts of the value chain fall within the sustainability reporting perimeter to ensure consistency and avoid gaps in data collection.
What makes a double materiality assessment defensible? A defensible assessment is structured and well documented. Companies should clearly explain how ESG topics were identified, how impacts and financial risks were evaluated, which methodology was used for prioritisation and how the results were validated through internal governance.
