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As the EU's Corporate Sustainability Reporting Directive (CSRD) becomes more widely applicable, sustainability teams are facing a new challenge: not just completing the double materiality assessment (DMA), but communicating its results clearly and effectively to auditors, leadership, and external stakeholders.

This guide covers how to structure and report on your DMA in a way that meets ESRS requirements and stands up to limited assurance review.

What ESRS requires for DMA reporting

Under ESRS 1, your sustainability statement must include a description of your double materiality assessment process. This is not optional — even companies that find all topics immaterial must explain why. The disclosure requirements include:

• A description of the process used to identify material topics
• An explanation of how stakeholders were engaged
• The outcomes of the assessment, including which topics are material and which are not
• The rationale for materiality decisions, particularly for topics assessed as not material

How to communicate your DMA results

1. Structure your disclosure around the ESRS framework

Organize your DMA reporting around the ESRS topical standards. For each standard, state whether the topic is material, not material, or partially material. For material topics, provide a summary of the key impacts, risks, and opportunities identified.

2. Document your process clearly

Auditors will assess not just your conclusions but your process. Describe how you identified the universe of sustainability topics, how you assessed impact materiality and financial materiality, what stakeholder engagement took place, and how you applied thresholds to reach your conclusions.

3. Be transparent about limitations

If your DMA relied heavily on desk research or had limited stakeholder engagement in some areas, acknowledge this and explain your plan to improve in future reporting years. Transparency strengthens credibility; attempting to hide gaps creates audit risk.

4. Connect your DMA to your disclosures

Your sustainability statement should flow logically from your DMA. If climate is material, ESRS E1 disclosures should follow. If a topic is not material, explain briefly why. Auditors will check for consistency between your DMA conclusions and your actual disclosures.

Practical tips for effective DMA communication

• Use a materiality matrix or equivalent visual to communicate results at a glance
• Maintain a detailed working document with the full IRO assessment for audit purposes
• Keep a record of stakeholder engagement: who was consulted, when, and what input they provided
• Update your DMA annually and track changes to material topics over time

How Coolset supports DMA reporting

Coolset's DMA module guides you through the full assessment process and generates documentation that meets ESRS 1 reporting requirements. The output maps directly to your ESRS disclosure scope, and the full audit trail is available for your assurance provider. Book a demo to see it in action.