Double Materiality — the 2026 regulatory guide for ESRS and CSRD.

What is double materiality?

Double materiality is a principles-based framework that requires an undertaking to assess sustainability matters from two distinct perspectives: its impacts on people and the environment (impact materiality), and the effects of sustainability matters on its own development, performance and position (financial materiality). A matter is material if it meets the threshold under either perspective, or both.^[1]

The concept, first formalised by the European Commission in its 2019 Guidelines on Non-Financial Reporting: Supplement on reporting climate-related information, was made a binding legal requirement by the Corporate Sustainability Reporting Directive (CSRD), adopted in Directive (EU) 2022/2464. The CSRD mandates that in-scope undertakings disclose information necessary to understand both perspectives, with neither automatically taking precedence over the other. ESRS 1 §28

For undertakings preparing their first sustainability statement, double materiality is the single most consequential concept in the entire reporting framework. It determines the scope of the report, the topics that must be covered, the data that must be collected, and the disclosures that must be made — or omitted, with explanation.

The legal basis

The requirement to conduct a double materiality assessment flows from three layered instruments of European Union law:

1. Directive (EU) 2022/2464 (CSRD), which amended the Accounting Directive 2013/34/EU. Articles 19a and 29a set out the substantive sustainability reporting obligation.^[2]
2. Commission Delegated Regulation (EU) 2023/2772, which adopted the first set of European Sustainability Reporting Standards (ESRS) — the technical rules that specify what undertakings must disclose.^[3]
3. Directive (EU) 2026/47, the Detailed Omnibus Directive, published in the Official Journal on 26 February 2026 and in force since 18 March 2026. It amends the CSRD’s scope and preserves the double materiality principle.^[4]

The ESRS are supplemented by non-authoritative EFRAG Implementation Guidance. EFRAG IG 1, finalised in May 2024, provides the illustrative DMA process. Where any conflict arises between the guidance and the ESRS, the standards take precedence.^[5]

Who must conduct a DMA?

Following the scope adjustments under Directive (EU) 2026/47, CSRD applies to:

• EU undertakings with more than 1,000 employees and net turnover above €450 million, or balance sheet total above €25 million
• EU subsidiaries and branches of non-EU parents where the group generates more than €450 million in EU net turnover and holds a qualifying EU presence
• Large EU undertakings on regulated markets that already reported under the Non-Financial Reporting Directive (Wave 1)

Undertakings below these thresholds — including the vast majority of small and medium-sized enterprises — are not in mandatory scope. SMEs that nonetheless face sustainability data requests from in-scope counterparties may align voluntarily with the Voluntary SME Standard (VSME), which includes a simplified materiality assessment. The Omnibus I Directive introduced a value-chain cap preventing in-scope undertakings from requesting information beyond the VSME scope from suppliers with fewer than 1,000 employees.^[6]

The scope reduction under Omnibus I is substantial: the Commission’s own impact assessment indicated that approximately 80% of the undertakings originally due to report under Waves One and Two are now out of mandatory scope. The DMA obligation, however, remains as demanding for those that remain.

Impact vs financial materiality — the two lenses

The two perspectives differ in focus but interact in practice.

Impact materiality (inside-out)

Impact materiality relates to the undertaking’s actual and potential impacts — positive and negative — on the environment and on people, including workers, value-chain actors, affected communities, and consumers or end-users. The assessment is made irrespective of whether the impact has financial consequences for the undertaking itself. ESRS 1 §43–45

The criteria for scoring impact materiality are:

• Scale — how grave the impact on people or the environment is
• Scope — how widespread the impact is (number of people affected, geographic breadth)
• Irremediability — the difficulty of reversing or remediating the harm
• Likelihood — for potential impacts only, the probability of occurrence

For potential negative human rights impacts, ESRS 1 §45 specifies that severity takes precedence over likelihood. This is a material deviation from enterprise-risk thinking and reflects the influence of the UN Guiding Principles on Business and Human Rights on the framework.^[7]

Financial materiality (outside-in)

Financial materiality relates to sustainability matters that trigger, or could reasonably be expected to trigger, financial effects on the undertaking. These effects may affect development, performance, position, cost of capital, or access to finance, across short, medium and long-term horizons. ESRS 1 §49

The criteria for scoring financial materiality are:

• Magnitude — the size of the financial effect on the undertaking
• Likelihood — the probability of the financial effect materialising
• Time horizon — short-term (up to one year), medium-term (1–5 years), long-term (over 5 years)

The ESRS concept of financial materiality is aligned with IFRS S1 financial materiality, enabling interoperability with the International Sustainability Standards Board framework through the joint EFRAG–ISSB Interoperability Guidance.^[8]

The ESRS topic universe

The starting inventory for any DMA is the list of sustainability matters in ESRS 1 Appendix A AR 16. The list is organised into ten topical standards across three regulatory-guides: Environment (E1–E5), Social (S1–S4), and Governance (G1). Each topical standard contains sub-topics and, in some cases, sub-sub-topics that together define the potential universe of material matters. ESRS 1 AR 16

The interactive tool below lets you explore each of the ten topics, their sub-topic structure, and illustrative impacts, risks and opportunities associated with them. All content is drawn from ESRS 1, the topical standards, and EFRAG IG 1.

The DMA process — four steps

EFRAG IG 1 sets out a principles-based, four-step process. The Simplified ESRS 1 preserves the four-step logic but permits greater flexibility in application, including the choice between top-down and bottom-up approaches.

Step 01 — Map the organisational context

The first step is to build a clear picture of the undertaking, its value chain, and the stakeholders connected to it. This means mapping the business model, principal activities, geographic footprint, and significant upstream and downstream relationships. It also means identifying two separate stakeholder groups: affected stakeholders (those impacted by the undertaking’s activities, including the environment) and users of sustainability statements (investors, lenders, regulators, counterparties). ESRS 1 §24

Step 02 — Identify impacts, risks and opportunities

Working from ESRS 1 AR 16 as the baseline topic list, supplemented by sector and entity-specific considerations, the undertaking generates a candidate list of impacts, risks and opportunities (IROs). These must be positioned across own operations, upstream value chain and downstream value chain. Each IRO is categorised as actual or potential, positive or negative. EFRAG IG 1 §3.2

The Simplified ESRS 1 permits two approaches:

1. Top-down — start at the sustainability topic level and assess whether each is material before drilling into specific IROs. Faster, suitable where topic-level materiality is evident from the business model.
2. Bottom-up — start with individual IROs and aggregate to the topic level. More granular, suitable where the undertaking has a mature enterprise risk management function that already identifies IROs.

Step 03 — Assess and score

Each IRO is scored against the relevant materiality criteria. The undertaking sets thresholds above which an IRO is treated as material. Thresholds can be qualitative or quantitative, but must be documented with supporting rationale. Under the Simplified ESRS, qualitative analysis is sufficient where the conclusion is clear — the evidence burden has been reduced relative to the original ESRS. Simplified ESRS 1 §31

Step 04 — Report and document

The final step is disclosure. The DMA process itself must be described under ESRS 2 IRO-1, and the list of disclosure requirements covered by the sustainability statement must be presented under ESRS 2 IRO-2. Both disclosures are required irrespective of the specific materiality outcomes of individual topics.^[9]

Thresholds and scoring

The ESRS do not mandate a specific scoring methodology. EFRAG IG 1 provides an illustrative matrix-based approach in which impact scores cross severity and likelihood axes, and financial scores cross magnitude and likelihood axes. Each axis is typically expressed on a 1–5 ordinal scale. EFRAG IG 1 Figure 5

Three principles govern threshold setting:

• Transparency — the undertaking’s methodology, thresholds and rationale must be disclosed under ESRS 2 IRO-1
• Consistency — thresholds should be applied consistently across topics within the assessment
• Proportionality — thresholds should be commensurate with the undertaking’s size, complexity, and context

The Simplified ESRS has introduced an explicit proportionality mechanism: undertakings may rely on reasonable and supportable information available without undue cost or effort, with an expectation that data coverage improves year-on-year. Where the mechanism is invoked, the scope, rationale, and plan to close data gaps must be explained.^[10]

Stakeholder engagement

Stakeholder engagement is central to the impact materiality assessment. ESRS 1 §24 requires the undertaking to identify affected stakeholders, and EFRAG IG 1 clarifies that engagement may be direct (with stakeholders themselves) or indirect (through proxies or experts) where direct engagement is not feasible. Social dialogue with workers’ representatives is regulated at EU and national level under the Accounting Directive as amended by the CSRD. EFRAG IG 1 §3.3

In practice, stakeholder engagement takes several forms:

• Surveys — structured questionnaires deployed to employees, suppliers, customers or communities
• Interviews — semi-structured dialogue with representative stakeholder proxies
• Workshops — facilitated sessions with cross-functional internal teams and external stakeholders
• Documentary review — scientific literature, regulatory filings, expert reports

The outcome of engagement feeds into the impact scoring but does not replace the undertaking’s own judgement. The undertaking remains responsible for the materiality conclusion.

Disclosure obligations

Once the DMA is complete, the sustainability statement must:

1. Describe the DMA process under ESRS 2 IRO-1 — covering the methodology, criteria, thresholds, stakeholder engagement approach, and governance of the assessment
2. List the disclosure requirements covered under ESRS 2 IRO-2 — both those arising from material IROs and those required irrespective of materiality (such as cross-cutting disclosures)
3. Provide topic-specific disclosures for each material matter, drawing on the topical ESRS (E1–E5, S1–S4, G1) and, where the topical standards are insufficient, entity-specific disclosures
4. Disclose interaction with strategy under ESRS 2 SBM-3 — explaining how material IROs interact with the business model and strategy

The sustainability statement must be prepared in a structured electronic format (XBRL tagging) and published within the management report. Assurance, starting at limited level and moving toward reasonable assurance, is mandatory under the CSRD framework.^[11]

What the Omnibus I Directive changed

The Detailed Omnibus Directive (Directive (EU) 2026/47), which amended the CSRD in early 2026, introduced three substantive changes that affect the DMA:

Scope reduction

Mandatory CSRD reporting now applies only to undertakings above 1,000 employees and €450 million net turnover. This removed approximately 80% of the undertakings that would previously have been in scope under Waves One and Two. Waves Three and Four were effectively removed.^[12]

Datapoint reduction

EFRAG’s Simplified ESRS technical advice, delivered on 3 December 2025, reduced mandatory datapoints by approximately 61% compared to ESRS v1. Overall, when voluntary items are included, the reduction reaches approximately 71%. The reduction is achieved through a “decision tree” that eliminated datapoints not meeting key CSRD objectives. EFRAG technical advice, Dec 2025

Methodological flexibility

The Simplified ESRS 1 introduced:

• The option to conduct the DMA top-down or bottom-up, with qualitative analysis sufficient where the conclusion is clear
• An explicit fair presentation framing for the sustainability statement as a whole
• Confirmation that a full DMA need not be repeated annually unless significant changes occur
• Aggregate-level reporting by topic where IRO-granular disclosure is not necessary
• Streamlined narrative requirements around policies, actions and targets

The principle of double materiality itself was expressly retained. It is the mechanics, not the concept, that the Omnibus reformed.

Common errors observed in Wave 1

EFRAG’s 2025 implementation review and analysis of the first Wave 1 CSRD reports surface a pattern of recurrent errors:

• Treating the DMA as a checklist exercise — mapping directly from ESRS topics to disclosures without substantive IRO analysis
• Aggregating impact and financial scores — producing a single blended materiality score rather than maintaining the two perspectives separately
• Inadequate documentation of thresholds — setting thresholds implicitly rather than with explicit qualitative or quantitative rationale
• Omitting value-chain impacts — focusing the assessment on own operations and under-investigating upstream and downstream
• Skipping stakeholder engagement — relying solely on internal judgement without consulting affected stakeholders or their proxies
• Insufficient governance oversight — failing to surface material IROs to administrative, management and supervisory bodies per ESRS 2 GOV
• Over-disclosure of non-material matters — disclosing defensively across the full topic list rather than applying the materiality filter with discipline

Over 40% of undertakings reviewed by EFRAG lacked a robust DMA; fewer than 30% had fully aligned their governance and risk disclosures with ESRS 2.^[13] The Simplified ESRS addresses several of these patterns directly through its materiality-of-information filter and fair presentation framing.

Looking ahead — the next regulatory milestones

Three milestones sit on the horizon between April 2026 and early 2028:

Mid-2026 — Commission delegated act

The Commission is expected to adopt the delegated act amending the ESRS by mid-2026, within six months of the Omnibus I Directive’s entry into force. A one-month feedback period will precede adoption, followed by Parliament and Council scrutiny of up to four months.^[14]

FY 2026 — Voluntary early application

Once the delegated act is adopted, undertakings reporting for FY 2026 may voluntarily apply the Simplified ESRS. Wave 1 undertakings continuing under the original ESRS may prefer the stability of unchanged standards; those with less mature DMAs may benefit from the reduced datapoint burden.

End-January 2027 — Non-EU Sustainability Reporting Standards (NESRS)

EFRAG is developing the NESRS, which will apply to non-EU parent undertakings that meet the CSRD’s extraterritorial scope. A public consultation is expected in Q3 2026, with technical advice to the Commission by end-January 2027. The NESRS will reflect the content of the Simplified ESRS — meaning that double materiality applies extraterritorially to non-EU groups with significant EU operations.^[15]

For undertakings preparing their first DMA in 2026, the regulatory ground will continue to shift. The structural principle of double materiality, however, has proved durable across every iteration of the framework since 2019. It is the concept, not the precise mechanics, that defines European sustainability reporting.