Double materiality and ESG reporting: how the DMA shapes CSRD disclosures

2026 regulatory guide to double materiality. This article focuses on the downstream reporting consequences.

“The DMA is not a parallel exercise to ESG reporting — it is the structural mechanism that defines what the sustainability statement contains.” ESRS 2 IRO-1 · IRO-2

How the DMA feeds the sustainability statement

Once the DMA identifies material impacts, risks and opportunities (IROs), the undertaking prepares the sustainability statement in four interconnected layers:

1. Methodology disclosure (ESRS 2 IRO-1) — a narrative explanation of how the DMA was conducted, including methodology, criteria, thresholds, stakeholder engagement approach and governance oversight of the assessment.
2. Disclosure requirements coverage (ESRS 2 IRO-2) — a list of the specific ESRS disclosure requirements that the sustainability statement covers. This includes both those triggered by material topics and those required irrespective of the materiality outcome.
3. Topical disclosures — the substantive content for each material matter, drawing on the topical ESRS (E1–E5, S1–S4, G1). Where the topical standards do not fully capture an IRO, entity-specific disclosures are added.
4. Strategic interaction (ESRS 2 SBM-3) — an explanation of how the material IROs interact with the undertaking’s strategy, business model and decision-making.

Matters not identified as material are omitted. Omissions are themselves informative: under ESRS 1, they signal to users of the sustainability statement that the undertaking assessed the matter and concluded it was not material.^[2]

What data the DMA generates for reporting

The DMA produces several artefacts that feed directly into the sustainability statement and the underlying data systems:

• Materiality matrix — a two-axis visualisation (impact materiality × financial materiality) of all assessed topics. While ESRS does not mandate a specific matrix format, the underlying score data must be documented.
• IRO register — a structured log of each identified impact, risk and opportunity, with category, value-chain position, scoring rationale and linkage to the relevant ESRS disclosure requirement.
• Threshold documentation — the qualitative or quantitative thresholds applied, with supporting rationale.
• Stakeholder engagement records — evidence of the engagement conducted with affected stakeholders and users of sustainability statements per ESRS 1 §24.
• Governance sign-off — evidence that the administrative, management and supervisory bodies have been informed of material IROs per ESRS 2 GOV.

These artefacts serve two audiences simultaneously: the users of the sustainability statement (investors, regulators, counterparties) and the limited assurance provider, who will test the DMA process and its outputs as part of the assurance engagement.

What the Simplified ESRS changed for reporting

The Simplified ESRS, in EFRAG’s technical advice to the Commission of 3 December 2025, reshaped the mechanics of how the DMA connects to ESG reporting. Three practical changes affect preparers:

Materiality-of-information filter

Under Simplified ESRS 1, materiality operates as an overarching filter: only material information is disclosed. This applies to all information in the sustainability statement, including the general disclosures in ESRS 2. In the original ESRS, certain disclosures were required irrespective of materiality. The Simplified ESRS narrows that set.^[3]

Fair presentation framing

The sustainability statement must now result in a complete, neutral and accurate depiction of material IROs — the fair presentation standard long used in IFRS financial reporting. This shifts the emphasis from mechanical compliance with a checklist of disclosures to a judgement about whether the statement, taken as a whole, fairly presents the undertaking’s material sustainability profile.^[4]

Reduced datapoint volume

Mandatory datapoints in the Simplified ESRS are reduced by approximately 61% compared to ESRS v1; overall, when voluntary items are included, the reduction reaches approximately 71%. The implication for reporting is that the undertaking disclosures fewer mandatory quantitative metrics per material topic, with more emphasis on narrative fair presentation of the undertaking’s approach.^[5]

The consequence for ESG reporting practice

The 2026 changes reward undertakings that invest in the DMA as a strategic exercise rather than a reporting prerequisite. Under the Simplified ESRS, the DMA is effectively the single most determinative input into the reported output. A weak DMA produces a weak sustainability statement. A defensible DMA produces a defensible sustainability statement, with an assurance-ready audit trail.

For CSRD Wave 2 undertakings preparing their first report, this is an opportunity. The 61% reduction in mandatory datapoints does not mean 61% less work on the DMA — if anything, the DMA work intensifies, because the reporting relies on its outcome more heavily. The undertakings that will produce the strongest CSRD reports in 2027 are those investing in DMA methodology and documentation in 2026.