Double Materiality under the CSRD: What Tools Can Substantiate Your Analysis?

Since the Corporate Sustainability Reporting Directive (CSRD) came into force on 1 January 2024, double materiality has become a mandatory step in sustainability reporting. On paper, the principle is straightforward. In practice, many analyses remain fragile, difficult to defend during audits, and of limited use for steering strategic decisions.

 

The weak point is rarely a lack of understanding of the regulatory framework. It lies in the ability to substantiate the real impacts of a company's activities. This is the most common feedback from companies we support on this topic: the exercise feels complicated, and above all subjective. That perceived subjectivity is exactly what substantiation is meant to correct, and this is where the choice of tools makes the difference.

 

This article offers an operational, rigorous reading of double materiality as required by the CSRD: what it actually covers, why it often fails, and which tools help build a robust analysis, aligned with the expectations of the European Sustainability Reporting Standards (ESRS) and the realities of value chains.

 

Double materiality under the CSRD: what does it actually mean?

 

Double materiality rests on two complementary axes:

Financial materiality: how sustainability issues affect a company's economic performance, financial position and trajectory (risks and opportunities).

Impact materiality: how a company's activities affect the environment, society and human rights, whether positively or negatively.

 

The CSRD requires these two dimensions to be assessed separately, then cross-referenced. An issue can be material on one axis only, or on both. This is not a contradiction to resolve: it is the logical outcome of two distinct viewpoints: one focused on the company, the other on its effects on the outside world.

 

Unlike conventional materiality matrices, which are often centred on stakeholder perception, the CSRD introduces a new requirement: impact must be assessed independently of its financial consequences.

 

Take water pollution as an example. On the impact axis, it may be highly material: significant discharges affect a waterway and the communities living along it. On the financial axis, the same issue may appear far less material in the short term, if no sanction or remediation cost is anticipated. It can shift onto the financial axis as soon as local regulation tightens or litigation emerges. The two readings do not contradict each other: they capture different information, at different points in time.

 

What are the typical mistakes in a double materiality analysis?

 

A frequent confusion between financial risk and real-world impact

 

A common mistake is to project financial risk onto the impact axis. The result: issues are deemed non-material for lack of direct economic consequences, even when their environmental impacts are well established.

 

Yet from an ESRS standpoint, the absence of financial risk does not cancel out a significant impact.

 

Impact assessments that are too declarative

 

Another typical mistake: impact ratings based solely on internal workshops or stakeholder questionnaires. These approaches are useful, but insufficient.

 

Without quantitative data, without an analysis of the value chain, impact materiality rests on perceptions rather than on facts that can be substantiated.

 

A purely declarative assessment might conclude that a biodiversity issue is moderate, based on an internal workshop. A material flow analysis may reveal that most of the pressure on ecosystems lies in raw material sourcing, largely outside the field of view of internal teams. It is this gap between perception and data that makes, or breaks, the credibility of a materiality matrix.

 

A value chain that remains insufficiently integrated

 

The most significant impacts often lie upstream (extraction, raw material production) or downstream, during use and end of life.

 

Limiting the analysis to the company's own operations mechanically leads to underestimating impacts.

 

Impact materiality: the most sensitive part of the exercise

 

Impact ≠ perception: what the ESRS actually require

 

The ESRS define impact as an actual or potential effect on the environment or society, independent of how it is perceived or of its financial consequences.

 

This marks a break with certain long-standing CSR practices, built mainly on opinion surveys. Impact assessment must be documented and grounded in specific or sector-level data.

 

Severity and likelihood: what the EFRAG criteria actually cover

 

Impact materiality is assessed primarily on severity, to which a second criterion, likelihood, is added for potential impacts. EFRAG (European Financial Reporting Advisory Group), the body that develops the ESRS on behalf of the European Commission, defines this articulation precisely. In practice, however, it is often flattened into a list of four equivalent criteria.

 

Severity is measured against three elements:

• scale: the intensity of the impact for the stakeholder or ecosystem concerned;
• scope: the number of people, species or ecosystems affected;
• irremediable character: whether the harm can be remedied, and to what extent remediation remains possible.

 

For potential impacts, that is, impacts that have not yet occurred, a second criterion applies: likelihood, meaning the chance that the impact will actually materialise. This criterion does not apply to impacts that have already occurred, for which severity alone is assessed.

 

Under the post-Omnibus version, actions that reduce the severity of an impact may be factored into the likelihood assessment, provided they have produced effects within the reporting year.

 

In our experience, likelihood remains the most contested criterion, precisely because it applies only to potential impacts. It requires taking a position on something that has not yet happened. An exercise that leaves more room for disagreement between stakeholders than the assessment of severity, which is more factual.

 

Why environmental data is decisive

 

Without data on material and energy flows, emissions or resources used, impact materiality assessments remain fragile. This is where quantitative approaches prove their worth.

 

How to conduct a robust double materiality analysis

 

Step 1: frame the issues from the ESRS

The list of issues is not built from a blank page. It starts from the list set out in the ESRS, then is supplemented with sector- and company-specific issues, identified from the business model and the actual value chain.

 

Step 2: substantiate environmental and social impacts

For environmental issues, this means identifying the main flows and pressures, locating impacts across the life cycle, and drawing on quantified data wherever possible to inform impact ratings.

 

Step 3: analyse financial risks and opportunities

Financial materiality relies on scenarios, distinct time horizons, and a strategic reading of dependencies and vulnerabilities.

 

Step 4: build a matrix that can withstand an audit

A robust matrix combines three qualities: it is traceable (documented methodology), consistent (explainable logic), and justifiable (substantiated assumptions).

 

What role can LCA play in building impact materiality?

 

Double materiality does not produce data: it aggregates it. Its role is to structure reporting. Generating the environmental, social or economic knowledge that feeds it is a separate task. This distinction changes how compliance should be approached: before thinking in terms of reporting, companies need to think in terms of available data, and its robustness.

 

LCA as a foundation for the credibility of impact materiality

 

Life Cycle Assessment (LCA) of a company's main products makes it possible to substantiate environmental and social impacts, identify hotspots across the value chain, and prioritise issues on a factual basis.

 

It provides a particularly solid foundation for evidencing environmental and/or social impact materiality. LCA (with the exception of organisational LCA) is carried out at product level. Representative products from the portfolio therefore need to be consolidated into a coherent set of LCAs.

 

How far should LCA go, and what should complement it?

 

Not every company needs an exhaustive LCA of all its products. A life-cycle perspective, even a simplified one, is nonetheless often essential to avoid major blind spots.

 

Beyond this, LCA is not the only lever available. Other approaches provide complementary data, or make its production mandatory. The EU Deforestation Regulation (EUDR) is not a measurement tool but a regulatory obligation; compliance with it generates directly usable data to document upstream risks and impacts in the value chain. FDES (Fiche de Déclaration Environnementale et Sanitaire in French, which means “Environmental and Health Declaration”) and PEP Ecopassport® (Product Environmental Profile) provide standardised, comparable product data. Eco-design, downstream, turns LCA results into concrete product decisions.

 

Which companies are affected by the CSRD?

 

The CSRD applies progressively, depending on company size and status.

 

At the time of writing, the Omnibus package has narrowed the scope of the CSRD to large companies, excluding listed SMEs in particular, and has pushed back the first reports for new categories of companies by two years (first reporting year 2027, publication in 2028), while maintaining the principle of mandatory sustainability reporting for entities that remain within scope.

 

Companies outside the scope of the CSRD can rely on the VSME standard (Voluntary Sustainability Reporting Standard for non-listed SMEs), but still face the same expectations of consistency and credibility from their stakeholders, particularly clients.

 

Turning double materiality into a strategic management tool

 

A well-conducted double materiality analysis is not just a regulatory box to tick. It helps prioritise environmental and social action, guide investment, and align strategy, R&D and reporting.

 

This is why it needs to be grounded in real impacts, not only in perceptions.

 

A double materiality analysis is only useful if it is specific

 

Double materiality marks a profound shift in sustainability reporting. It only has value if it reflects a company's own reality: its sector, its business model, its actual value chain. A generic list of issues, or a matrix copied from a competitor's, will hold up neither to audit scrutiny nor to strategic decision-making.

 

At EVEA, we believe that the robustness of a double materiality analysis depends on its ability to bring together regulatory requirements, reliable environmental and social data, and a detailed understanding of value chains.

 

Because a credible sustainability strategy always starts with a clear-eyed reading of its impacts, and with the right tools to substantiate them.

 

Laurence Beck, Eco-design Project Manager, Sustainable Solutions & Strategies