CSRD Double Materiality Assessment: Step-by-Step Guide

The first wave of approximately 11,000 companies published their inaugural CSRD reports in 2025, covering fiscal year 2024 data. Now, with the EU Omnibus I Directive officially published in February 2026, the landscape has shifted.

The scope has narrowed, timelines have adjusted, but one thing has not changed: every company still in scope must complete a CSRD double materiality assessment before it can determine what to report.

S&P Global’s 2025 Corporate Sustainability Assessment found that about 48% of assessed companies globally now use a double materiality approach.

That number is growing fast. But having an approach and executing one that satisfies ESRS requirements and withstands limited assurance are two different things. Many organizations, particularly U.S. multinationals with EU operations, are still struggling to move from concept to implementation.

This guide walks through the complete CSRD double materiality assessment process, step by step.

You will learn how to identify and score Impacts, Risks, and Opportunities (IROs), engage stakeholders effectively, set defensible thresholds, and document your findings in a format that supports both enterprise risk management objectives and regulatory compliance.

Every section maps to EFRAG’s Implementation Guidance (IG 1) and the relevant ESRS disclosure requirements.

What Is Double Materiality Under the CSRD?

Double materiality is the foundational concept behind the CSRD’s reporting requirements. The term refers to the obligation for companies to evaluate sustainability topics from two distinct but interrelated perspectives.

Impact materiality looks outward: how do your business activities affect people and the environment across your entire value chain? Financial materiality looks inward: how do sustainability-related developments create risks and opportunities that affect your financial performance, position, and cash flows?

A sustainability topic qualifies as material if it meets the threshold under either perspective, or both. That is the critical distinction from traditional single-materiality frameworks used by the ISSB, which focus exclusively on financial relevance to investors.

The CSRD bridges the gap by requiring disclosure on both dimensions, aligning closely with the GRI Standards for impact materiality and IFRS S1/S2 for financial materiality.

Impact Materiality vs. Financial Materiality

Regulatory Context: CSRD, ESRS, and the Omnibus Update

The CSRD was adopted by the European Parliament in November 2022 and replaced the Non-Financial Reporting Directive (NFRD).

The European Commission subsequently adopted the first set of European Sustainability Reporting Standards (ESRS) on July 31, 2023, through a delegated regulation. EFRAG, the European Commission’s technical adviser, developed the standards and has since published three Implementation Guidance documents: IG 1 (materiality assessment), IG 2 (value chain), and IG 3 (data points).

The timeline has evolved significantly. The EU’s Omnibus I package, finalized through a Council-Parliament agreement in December 2025 and officially published as Directive (EU) 2026/470 in February 2026, introduced major changes.

The scope now applies to EU companies with more than 1,000 employees and over €450 million net turnover. Non-EU groups need €450 million net EU turnover and an EU subsidiary or branch with over €200 million turnover.

The “Stop-the-Clock” directive already postponed Wave 2 and Wave 3 reporting by two years. Companies that remain in scope will report from financial years starting January 1, 2027.

The double materiality requirement remains unchanged. As Harvard Law School’s corporate governance forum noted, the Omnibus package retains double materiality despite earlier speculation about a possible reversion to financial-only materiality.

Companies still need to evaluate both how sustainability matters affect their finances and how their operations impact society and the environment. EFRAG is also simplifying the ESRS with a revised delegated act expected by September 2026, reducing mandatory data points while keeping the core risk management framework intact.

Updated CSRD Timeline After Omnibus I

The CSRD Double Materiality Assessment: Step-by-Step Process

EFRAG’s IG 1 does not mandate a single methodology. The guidance states that no one process would suit all types of economic activity, organizational structure, or value chain configuration.

However, it illustrates a structured approach that meets ESRS requirements. The process below synthesizes EFRAG’s guidance with practical implementation experience. Each step maps to specific ESRS disclosure requirements.

Step 1: Understand Your Business Context

Before identifying any sustainability topics, you need a clear picture of your company’s activities, business model, geographic footprint, and value chain.

This contextual foundation determines which sustainability matters could plausibly be relevant.

Review your business plan, strategy documents, financial statements, and investor communications. Map your products and services against their geographic locations. Identify the type and nature of your upstream and downstream business relationships.

ESRS 1 defines time horizons you must apply: short-term aligns with your financial reporting period, medium-term extends to five years, and long-term goes beyond five years.

Analyze media reports, peer benchmarks, and scientific publications on sustainability trends in your sector. This step feeds directly into ESRS 2 SBM-1 (strategy and business model) and SBM-2 (interests and views of stakeholders). Conduct a thorough baseline risk assessment to anchor this contextual analysis.

Step 2: Build Your Sustainability Topics Longlist

Start with the full list of ESRS sustainability matters in ESRS 1 Appendix AR 16. These cover ten topics across three pillars: Environment (climate change, pollution, water and marine resources, biodiversity and ecosystems, resource use and circular economy),

Social (own workforce, workers in the value chain, affected communities, consumers and end-users), and Governance (business conduct).

Add any entity-specific or sector-specific topics not covered by the standard list. Cross-reference against established ESG frameworks including GRI, SASB, and the TCFD recommendations to catch gaps.

Step 3: Identify Impacts, Risks, and Opportunities (IROs)

This is the most labor-intensive step. Break each sustainability topic down into specific IROs. An impact is a positive or negative effect your company has on people or the environment.

A risk is a potential negative financial effect arising from a sustainability matter. An opportunity is a potential positive financial effect.

Use multiple input sources: internal subject matter experts, operational data, risk registers, incident logs, regulatory databases, lifecycle assessment data, and carbon footprinting results. Workshop formats with cross-functional teams work well here, pulling in operations, finance, procurement, HR, legal, and sustainability teams.

Step 4: Engage Stakeholders

Stakeholder engagement is a mandatory component under ESRS 2 IRO-1 paragraph 53(b)(iii). You need to consult with affected stakeholders, meaning those who may be impacted by your company’s activities.

This includes employees, workers in the supply chain, local communities, customers, and civil society organizations.

The purpose is not to delegate the assessment to stakeholders but to understand their perspectives on how they are affected and to validate your identification of IROs. Use a mix of engagement methods: surveys, interviews, focus groups, and existing feedback channels.

Document every engagement including who was consulted, what was discussed, and how their input was incorporated. Structured risk assessment workshops are an effective vehicle for this.

Step 5: Assess Materiality of Each IRO

Apply distinct criteria for each materiality dimension. Impact materiality for actual negative impacts uses severity, measured across three sub-criteria: scale (how serious is the impact?), scope (how widespread?), and irremediability (can the damage be undone?). Potential negative impacts add likelihood to the severity assessment.

Positive impacts use scale and scope. Financial materiality evaluates both the magnitude of potential financial effects and their likelihood.

EFRAG’s IG 1 stresses that companies should set quantitative or qualitative thresholds and document the rationale. A useful starting point: any IRO scoring above a defined threshold on a 1–5 severity scale across any sub-criterion warrants inclusion.

Step 6: Set Thresholds and Aggregate Results

Define clear materiality thresholds before scoring begins. ESRS 2 IRO-1 and IRO-2 require you to disclose the thresholds you used and the judgments applied. Your thresholds should be consistent with internal risk appetite statements.

Once individual IROs are scored, aggregate results by sustainability topic. A topic is material if one or more of its associated IROs exceeds the materiality threshold under either the impact or financial dimension.

Validate the aggregated results with senior management. Present findings in a format that maps each material topic to its driving IROs, the dimension(s) under which it is material, and the relevant ESRS disclosure requirements.

Step 7: Document and Disclose

Documentation is not an afterthought. EFRAG’s IG 1 FAQ 12 explicitly states that a certain level of documentation is needed for internal purposes and to help assurance providers perform their work.

Your disclosure must cover the process description (ESRS 2 IRO-1), the interaction of material IROs with strategy and business model (ESRS 2 SBM-3), and the ESRS disclosure requirements covered by your sustainability statement (ESRS 2 IRO-2).

Capture management judgments, scoring rationale, threshold definitions, stakeholder engagement records, and any entity-specific disclosures for IROs not covered by the standard topical ESRS. Think of this as building your GRC framework documentation from the ground up.

ESRS Sustainability Topics: Complete Reference

The ESRS organize sustainability matters into ten topical standards across three pillars. Your double materiality assessment must consider every topic at the sub-topic and sub-sub-topic level before determining which are material.

The table below provides the complete mapping. Use this as your starting checklist alongside ESRS 1 AR 16.

Integrating Double Materiality with Enterprise Risk Management

A CSRD double materiality assessment shares significant methodological overlap with established ERM frameworks. Both require identifying risks and opportunities, assessing their likelihood and magnitude, setting thresholds aligned with organizational appetite, and reporting outcomes to governance bodies.

The difference is scope: ERM traditionally focuses on financial and operational risks to the enterprise, while double materiality adds the impact dimension, evaluating how the company affects external stakeholders and the environment.

Smart organizations are converging the two processes rather than running parallel tracks. The COSO ERM framework and ISO 31000 both provide structures for embedding sustainability risks into enterprise-wide risk registers.

Key risk indicators (KRIs) can be designed to track both financial materiality triggers (carbon cost exposure, regulatory penalty probability) and impact materiality triggers (GHG intensity per unit, worker safety incident rates). The Three Lines Model applies directly: first-line operational managers own IRO data collection, second-line risk and compliance functions oversee the assessment methodology and thresholds, and third-line internal audit provides independent assurance.

CSRD Double Materiality: Implications for U.S. Companies

U.S.-headquartered companies with significant EU operations are directly in scope of the CSRD if they meet the non-EU thresholds. Under the finalized Omnibus I framework, the trigger for non-EU groups is over €450 million net turnover generated in the EU (for each of the last two consecutive financial years) and an EU subsidiary or branch with over €200 million net turnover.

These thresholds are considerably higher than the original CSRD scoping criteria, removing many mid-sized U.S. companies from mandatory reporting.

However, as Deloitte has noted, U.S. multinationals providing a consolidated sustainability report at the enterprise level under ESRS may find that the double materiality assessment surfaces topics that also warrant consideration for SEC disclosure purposes.

The more prescriptive ESRS approach to identifying material IROs could lead registrants to reassess the sustainability matters they disclose in SEC filings. Separately, California’s SB 253 requires Scope 1 and 2 reporting starting January 2026, with Scope 3 following in 2027. Companies conducting a CSRD double materiality assessment can leverage that work for California compliance through a well-structured business risk assessment approach.

Even companies not legally required to report are finding strategic value in the double materiality process.

Voluntary alignment with ESRS signals credibility to European customers, investors, and supply chain partners who are themselves subject to CSRD. The assessment also feeds directly into third-party risk management programs, as large EU companies will continue requesting sustainability data from their value chain regardless of whether those suppliers are individually in scope. Strong operational risk management practices provide a foundation for integrating these requirements.

Implementation Roadmap

Common Pitfalls and How to Avoid Them

Looking Ahead: Trends for 2026–2028

The regulatory landscape is still moving. EFRAG released its draft simplified ESRS in December 2025, and the European Commission is currently preparing a revised delegated act incorporating EFRAG’s technical advice.

The revised ESRS will reduce mandatory data points while keeping the double materiality principle fully intact. Companies should plan for the revised standards to be adopted by September 2026, in time for Wave 2 reporting on FY 2027 data.

Convergence between ESRS and ISSB standards is accelerating. EFRAG and the ISSB published joint interoperability guidance in May 2024, and the revised ESRS are expected to further align the financial materiality provisions with IFRS S1 and S2.

Companies reporting under both frameworks will increasingly benefit from a single assessment process that satisfies both sets of requirements. This makes investing in a robust double materiality methodology now a cost-effective choice.

Assurance requirements are also tightening. Limited assurance is mandatory for CSRD reports from the outset, with potential escalation to reasonable assurance by 2028.

Companies that build audit-ready documentation into their materiality assessment process from Day 1 will avoid costly retrofitting. Quantitative risk analysis methods, including scenario analysis and stress testing, will become increasingly important for substantiating financial materiality conclusions, particularly for climate-related IROs.

Finally, expect the double materiality concept to spread beyond Europe. Major institutional investors and stock exchanges are already incorporating dual-lens materiality into their stewardship codes and listing requirements.

U.S. companies that proactively adopt double materiality will be better positioned for whatever domestic reporting requirements emerge in the coming years, whether from the SEC, state regulators like California, or voluntary frameworks gaining market traction. Building this capability now through a solid risk quantification approach positions your organization for long-term resilience.

Ready to start your CSRD double materiality assessment? Visit riskpublishing.com/services for step-by-step frameworks, assessment templates, and expert consulting support. Need hands-on guidance? Contact our team to discuss your compliance roadmap.

References

1. European Commission: Corporate Sustainability Reporting Directive (CSRD) — EU overview of CSRD and double materiality concept

2. EFRAG IG 1: Materiality Assessment Implementation Guidance — Official guidance on conducting double materiality assessments

3. EFRAG ESRS Knowledge Hub: IG 1 Materiality Assessment — Interactive implementation guidance from EFRAG

4. Deloitte: Unpacking the Double Materiality Assessment Under CSRD — Deloitte analysis of DMA approaches and SEC considerations

5. Deloitte: European Sustainability Omnibus Update (August 2025) — Comprehensive overview of Omnibus timeline and ESRS revisions

6. Harvard Law Forum: Impacts for US Companies of the Proposed EU Omnibus Package — Analysis of Omnibus implications for U.S. companies

7. Gibson Dunn: Omnibus Simplification of EU Sustainability Rules Enacted (February 2026) — Final enactment summary of Directive (EU) 2026/470

8. Morrison Foerster: EU Sustainability Omnibus I Adopted — Legal analysis of final Omnibus I agreement

9. EU Council: Deal to Simplify Sustainability Reporting (December 2025) — Official Council press release on Omnibus I agreement

10. S&P Global: The State of Double Materiality in Corporate Reporting — Global data on double materiality adoption rates

11. FTI Consulting: CSRD Readiness in 2026 — Practical compliance timeline guidance for corporate issuers

12. Ropes & Gray: EU CSRD Materiality Assessment Guidance Finalized — Key points from finalized EFRAG IG 1 guidance

13. PwC: CSRD Double Materiality Assessment Overview — Seven-step process overview from PwC

14. Cooley: EU Reaches Agreement on Omnibus I for US Companies — Implications for non-EU companies post-Omnibus

15. Latham & Watkins: European Institutions Reach Agreement on Sustainability Omnibus — Summary of revised thresholds and exemptions

Chris Ekai

Chris Ekai is a Risk Management expert with over 10 years of experience in the field. He has a Master’s(MSc) degree in Risk Management from University of Portsmouth and is a CPA and Finance professional. He currently works as a Content Manager at Risk Publishing, writing about Enterprise Risk Management, Business Continuity Management and Project Management.