Materiality Assessments in 2026: How Double Materiality Is Reshaping Reporting Scope Worldwide

The standard framing of this debate is that Europe requires double materiality and everyone else requires single materiality, and that companies caught by both must run two assessments.

The first half is roughly right. The second half is wrong, and it is costing companies money.

The official interoperability guidance published jointly by EFRAG and the IFRS Foundation states that the definition of financial materiality in ESRS is aligned with the definition of materiality in IFRS S1. Not similar. Aligned. An entity that applies ESRS is expected to be able to identify the disclosures considered material under the ISSB standards using the outcome of its ESRS financial materiality assessment, and the reverse holds too.

That has a direct practical consequence. Double materiality is not two separate assessments bolted together. It is the ISSB assessment plus an additional impact lens applied to the same underlying analysis. Understanding that changes how you scope the work, and it is the single most useful thing in this article.

The Two Concepts, Precisely

Single materiality, the ISSB approach, asks one question: could this sustainability matter reasonably be expected to affect the entity's prospects, meaning its cash flows, access to finance or cost of capital, in a way that would influence investor decisions? The threshold is investor relevance. Information is material if omitting, misstating or obscuring it could reasonably be expected to influence the decisions of primary users of general purpose financial reports.

Double materiality, the ESRS approach, asks two questions and treats either as sufficient. Impact materiality covers the actual and potential impacts, positive and negative, that the undertaking has on the environment and on people, including workers, value chain actors, affected communities and consumers. Critically, impact materiality is assessed regardless of whether those impacts create financial consequences for the undertaking. Financial materiality covers the effects of sustainability matters on the undertaking's own development, performance and position.

A matter is material under ESRS if it clears the threshold under either perspective, or both.

So the difference is not that one framework is financial and the other is not. Both include the financial lens, defined the same way. The difference is that ESRS adds a second, independent test that can pull a topic into scope even when it has no financial consequence for the company at all.

Where The World Has Actually Landed

The global picture is more lopsided than European coverage suggests.

Single materiality, through ISSB adoption, is now the dominant model. Australia's AASB S2, Singapore's SFRS S2, the UK SRS, Canada's CSDS 1 and 2, Japan's SSBJ standards and Korea's KSSB standards all rest on the IFRS S1 and S2 architecture and its investor-focused threshold. Brazil built its regime on the same foundation, though it reverted to comply or explain in 2026.

Double materiality is the minority position, but not a European eccentricity. China's exchange rules and the Ministry of Finance's Corporate Sustainability Disclosure Standards use double materiality, aligning the world's second largest economy with the EU rather than the ISSB on this specific question.

For a multinational, that produces an awkward asymmetry. Your European and Chinese subsidiaries need impact assessment. Your Australian, Singaporean, Japanese, Korean, Canadian and UK entities do not. The group process has to accommodate both without running everything twice.

What The Revised ESRS Changed, And What It Did Not

Double materiality survived the Omnibus simplification. That is the headline, and it disappointed those who expected the EU to converge on the ISSB model. The revised standards adopted on 3 July 2026 reaffirm double materiality as the principle determining what a company discloses.

What changed is how the assessment is meant to be run, and EFRAG identified it as one of the six central simplification levers precisely because the first reporting cycle exposed it as too complex and time consuming.

Top-down is now explicitly permitted. The original approach pushed companies toward a bottom-up assessment, working through every ESRS topic from scratch and testing each for materiality. Companies found this generated enormous effort for little insight. The revised standards allow a top-down approach: start from business strategy and operations, identify what is clearly material, then map those topics to ESRS disclosures. Deeper bottom-up analysis can be reserved for topics where the answer is genuinely uncertain.

Fair presentation applies at the level of the statement, not the datapoint. This is a quieter change with large consequences. Under the revised architecture, applying the ESRS is stated to result in fair presentation, and fair presentation attaches to the sustainability statement as a whole. A company running a disciplined assessment can conclude a topic is not material, omit its disclosures, and remain compliant, provided it is transparent about the basis for that conclusion where required.

Thresholds were clarified to focus on genuinely significant impacts, risks and opportunities rather than exhaustive coverage.

The combined effect is that the assessment now controls scope more directly than before. Companies that invested in a structured double materiality assessment are rewarded, because a defensible assessment licenses omission. Companies that treated it as a formality have less to lean on.

One thing to note carefully: certain disclosures remain mandatory regardless of your assessment. ESRS 2 general disclosures, ESRS E1 on climate, and specified disclosures within ESRS S1 on own workforce apply whether or not you conclude the topic is material. Where a topic is not deemed material, a brief explanation is required.

The Overlap Most Companies Fail To Exploit

Return to the interoperability point, because this is where the practical saving sits.

EFRAG's Implementation Guidance 1 on materiality assessment, finalised in May 2024, includes responses to frequently asked questions on interoperability with both the ISSB standards and the GRI Universal Standards. Its conclusion is that an undertaking applying the ESRS is expected to be able to comply with the identification of sustainability-related risks and opportunities under the ISSB standards, reflecting an alignment in scope between financial materiality in the ISSB standards and in ESRS.

The joint interoperability guidance goes further, confirming a high degree of alignment in climate-related disclosures specifically, with almost all ISSB climate disclosures included in ESRS.

There is also a useful bridge from GRI. Where a company has performed an assessment under the GRI Universal Standards, that assessment constitutes a good basis for assessing impacts under the ESRS. So a company with mature GRI practice has already built much of the impact leg.

The practical architecture that follows is a single assessment with three outputs. One analysis of your business, value chain and stakeholders. From it, a financial materiality determination that serves both ESRS and every ISSB jurisdiction. Plus an impact materiality determination that serves ESRS, China and GRI. The incremental work is the impact lens, not a parallel process.

Running The Assessment

Both EFRAG and the ISSB have published four-step processes, and they run in parallel more closely than the framework difference implies. EFRAG's Implementation Guidance 1 provides the illustrative ESRS process; the ISSB published educational material in November 2024 illustrating a four-step approach for IFRS S1. Neither prescribes a rigid procedure, and both expect integration with existing enterprise risk management.

A workable combined sequence looks like this.

Understand the context. Map your activities, business relationships, value chain and geographies, then identify affected stakeholders. This step is shared entirely between the two frameworks. Under ESRS, affected stakeholders should be consulted, and the standards treat nature as a stakeholder without a voice, which means environmental impacts need a proxy for representation rather than being skipped for lack of a complainant.

Identify impacts, risks and opportunities. The ESRS terminology is IROs. Work top-down from strategy and operations to surface what is obviously significant, using sector knowledge and peer practice, then go deeper only where the answer is unclear. For the ISSB leg, focus on sustainability matters that could reasonably affect prospects across short, medium and long time horizons.

Assess and score. Impact materiality turns on severity, meaning scale, scope and remediability, and on likelihood for potential impacts. Actual impacts are assessed on severity alone. Financial materiality turns on the magnitude of potential financial effect and its likelihood. Use reasonable and supportable information available without undue cost or effort, which is the standard the revised ESRS applies.

Determine and document. Set thresholds, apply them consistently, and record the reasoning. The assessment process and the judgements behind it are themselves subject to disclosure under IFRS S1, and the ESRS require transparency about the basis for concluding a topic is not material. In both frameworks, the documentation is part of the deliverable rather than internal working papers.

Where Assessments Go Wrong

Six failure patterns recur, and most are avoidable.

Treating it as a stakeholder survey. Consultation informs the assessment. It does not determine the outcome. A topic that stakeholders rank highly but that has no significant impact or financial effect is not material, and a topic nobody mentioned may well be.

Confusing impact with financial risk. The most common technical error. An impact on people or the environment is material under ESRS even where it creates no cost, liability or reputational exposure for the company. Assessing impacts by asking what could hurt us collapses double materiality back into single materiality.

Running bottom-up when top-down would do. The revised ESRS explicitly permit starting from strategy. Companies still working through every topic from scratch are generating cost the standards no longer require.

Undocumented thresholds. If you cannot explain why a topic scored 3 rather than 4, and what the cutoff was, the assessment will not survive assurance. Scoring scales should be defined before scoring begins, not calibrated afterwards to produce a comfortable answer.

Set and forget. Materiality changes as the business, value chain and regulatory environment change. The revised ESRS clarifications alone mean existing assessments should be reviewed and, where necessary, updated. An assessment carried forward unchanged for three years is a red flag.

Ignoring the value chain. Impacts occurring upstream and downstream are in scope even though they happen in another company's operations. This is the part most likely to be under-assessed, and it connects directly to Scope 3 data work.

What This Means For Multinationals

Build one assessment, not several. The financial leg is common to ESRS and every ISSB jurisdiction, and the definitions are aligned by design. Run the analysis once, then apply the impact lens for the EU and China.

Let the assessment do more work than it used to. Under the revised ESRS, a defensible assessment is what licenses you to omit disclosures. That makes the assessment the highest leverage activity in a CSRD programme, not a preliminary step before the real reporting begins.

Keep it audit ready. Limited assurance applies under CSRD, Australia assures from the first report, and other jurisdictions are following. The assessment methodology, scoring, thresholds and stakeholder inputs all need to be documented to a standard an assurer can test.

Revisit before your first Wave 2 report. For companies reporting on financial year 2027, the assessment underpinning that report should reflect the revised standards rather than the 2023 architecture. Clarifications to thresholds and process can change outcomes at the margin.

Do not expect convergence soon. The EU had an opportunity to drop double materiality during the Omnibus process and declined. China is aligned with the EU on this point. The two-model world is the operating environment for the foreseeable future, and the sensible response is a process designed to serve both rather than a bet on one winning.

The most useful reframing is this. Double materiality is not a heavier version of single materiality. It is the same financial assessment with an additional, independent question attached. Companies that structure their process around that insight run one assessment and report everywhere. Companies that treat the two frameworks as separate regimes run two, pay twice, and produce inconsistent answers to what is fundamentally the same analysis.

Materiality Assessment Checklist

Recognise that ESRS financial materiality and IFRS S1 materiality are aligned by definition, so the financial leg serves both frameworks.
Map which entities need impact materiality, currently the EU and China, and which need only financial materiality.
Use the top-down approach now explicitly permitted under the revised ESRS, reserving bottom-up analysis for genuinely uncertain topics.
Remember that ESRS 2, ESRS E1 and specified ESRS S1 disclosures apply regardless of your materiality conclusions.
Provide a brief explanation for any topic assessed as not material.
Assess impacts on their own terms, on severity and likelihood, not by asking what could harm the company financially.
Include upstream and downstream value chain impacts, which are the most commonly under-assessed.
Consult affected stakeholders as an input, not as the determinant of the outcome.
Define scoring scales and thresholds before scoring, and document the reasoning behind each judgement.
Treat the documentation as a deliverable, since the assessment process is itself subject to disclosure and to assurance.
Use any existing GRI assessment as a starting point for the impact leg.
Review and update your assessment against the revised ESRS before your first report under them.

Position as of August 2026. The revised ESRS were adopted on 3 July 2026 and apply from financial year 2027, with voluntary early application for financial year 2026. EFRAG Implementation Guidance is non-authoritative, and where guidance and the standards conflict, the standards take precedence. Confirm current requirements against EFRAG, the European Commission and the IFRS Foundation, and take professional advice for your circumstances.

Sources

European Commission, Directive (EU), EFRAG, IFRS Foundation, Global Reporting Initiative, PwC, Rödl and Partner, Workiva, Datamaran, Coolset, Enhesa, Generation Impact Global

This article is intended for general professional information and does not constitute legal, financial, or investment advice.