ESRS Standards 2026: Complete EU Sustainability Reporting Guide

If your company has European operations, serves European customers, or raises capital from European investors, the European Sustainability Reporting Standards (ESRS) are no longer a regulatory abstraction. They define what sustainability information gets reported, how it gets audited, and — increasingly — what procurement teams, banks, and investors expect from your ESG disclosures. Yet despite growing awareness of CSRD as the governing law, ESRS remain widely misunderstood: how the 12 standards actually work, what double materiality requires in practice, who is genuinely in scope after the 2025 Omnibus Package, and what assurance obligations apply from day one.

This guide addresses each of these questions directly — organized around the search queries and implementation challenges we encounter most frequently in practice. Whether you are a large EU company preparing your first CSRD report, a US-headquartered multinational with significant EU revenue, or a non-listed SME receiving supplier questionnaires from large customers, the analysis below is structured to give you what you actually need: clarity on scope, a workable understanding of double materiality, an honest assessment of the current timeline after Omnibus, and a realistic picture of assurance obligations.

ESRS vs. CSRD: Understanding the Difference

The single most persistent source of confusion in sustainability reporting discussions is treating ESRS and CSRD as interchangeable. They are not. Getting this distinction right matters because it shapes how you scope your compliance effort, who is responsible for what, and what "non-compliance" actually means in legal terms.

The Corporate Sustainability Reporting Directive (CSRD) is EU legislation. It entered into force on 5 January 2023 and establishes the legal obligation for companies above defined thresholds to publish a sustainability report as part of their management report. CSRD defines who must report, when, and under what governance conditions. It also mandates external assurance and introduces director-level legal liability for materially misleading sustainability statements.

The European Sustainability Reporting Standards (ESRS) are the technical standards that specify what to report and how. EFRAG (the European Financial Reporting Advisory Group) developed them; the European Commission adopted the first full set as a delegated act in July 2023. Think of the relationship the way you would think of Sarbanes-Oxley requiring GAAP compliance — the legislation creates the obligation, the accounting standards define the content.

In practice: CSRD is the law that determines whether your company must report. ESRS is the reporting framework your company uses to fulfill that legal obligation. A company can be subject to CSRD while still working out which ESRS disclosures apply to it (through the double materiality assessment described below). These are sequential questions, not simultaneous ones.

One further distinction worth making explicit: ESRS are mandatory and audited. This separates them categorically from voluntary ESG frameworks such as GRI, TCFD, or ISSB standards, which companies adopt by choice and which carry no statutory assurance requirements. ESRS disclosures, once triggered, are subject to external assurance with the same directorial liability as financial statements.

The 12 ESRS Standards Explained

The full ESRS set comprises 12 individual standards organized across two structural categories: cross-cutting standards that apply to all in-scope companies, and topical standards covering environmental, social, and governance subject matter. Understanding which standards are mandatory in all circumstances and which depend on your materiality assessment is foundational to planning your reporting effort.

Cross-Cutting Standards: Mandatory for All

ESRS 1 (General Requirements) sets out the general principles and concepts that underpin all ESRS reporting. It does not itself contain specific disclosure requirements but defines the architecture — including the double materiality principle, the reporting boundary, and the treatment of comparative information. Every in-scope company must apply ESRS 1 regardless of what the materiality assessment finds.

ESRS 2 (General Disclosures) contains disclosure requirements that apply irrespective of which sustainability topics are material. This includes governance disclosures, strategy and business model descriptions, stakeholder engagement processes, and the company's overall approach to materiality. ESRS 2 is non-negotiable — there is no materiality-based opt-out for any of its requirements.

Topical Standards: Subject to Materiality Assessment

The ten topical standards are triggered only where the relevant topic is found to be material through the double materiality assessment. If a topic is not material, the corresponding standard's disclosure requirements do not apply — but the company must explicitly state this and explain the basis for its conclusion. That explanation itself becomes an auditable disclosure.

• ESRS E1 – Climate Change: Transition plans, Scope 1/2/3 emissions, physical and transition climate risks. For most companies, this will be material. Climate risk disclosure under ESRS E1 is structurally more demanding than TCFD — it requires scenario analysis, target-setting aligned with the Paris Agreement, and detailed value chain emissions coverage. For background on climate risk assessment methodology, the considerations go well beyond financial risk.
• ESRS E2 – Pollution: Air, water, soil pollution from company activities, including hazardous substances and microplastics.
• ESRS E3 – Water and Marine Resources: Water consumption, water stress exposure, impacts on marine ecosystems. Water risk assessments are increasingly relevant here as regulators and investors pay closer attention to freshwater scarcity.
• ESRS E4 – Biodiversity and Ecosystems: Impacts on land use, species, ecosystems — the most complex topical standard to operationalize. Companies working through E4 will find significant conceptual overlap with the TNFD framework, which addresses nature-related financial disclosures along similar lines.
• ESRS E5 – Resource Use and Circular Economy: Material inputs, waste, product end-of-life, circular economy transition. Life cycle thinking is directly relevant — companies with complex product portfolios will need to draw on life cycle assessment methodologies to populate E5 disclosures credibly.
• ESRS S1 – Own Workforce: Working conditions, pay equity, health and safety, workforce composition, collective bargaining.
• ESRS S2 – Workers in the Value Chain: Labor rights, working conditions, health and safety for supply chain workers.
• ESRS S3 – Affected Communities: Impacts of company activities on local communities, indigenous peoples, land and resource rights.
• ESRS S4 – Consumers and End-Users: Product safety, data privacy, responsible marketing, access to products.
• ESRS G1 – Business Conduct: Anti-corruption, anti-bribery, lobbying, supplier relationships, payment practices.

The 2026 Amendment: Fewer Mandatory Datapoints

A significant structural change is already in motion. EFRAG's November 2025 amended ESRS reduce mandatory datapoints by approximately 61% compared to the original standards and remove all voluntary datapoints across all 12 standards. The revised standards are targeted for application from 1 January 2027, with optional early use available for the 2026 financial year. This is material for any company currently in mid-preparation — the datapoint reduction means that some disclosures you may be building processes for will no longer be required under the amended framework.

The practical implication: companies beginning their ESRS journey now should build toward the amended standards rather than investing heavily in datapoints that will be removed. Companies already in Wave 1 reporting (2024 financial year) should document their current approach clearly to enable a clean transition to the amended framework from 2027 onward.

Double Materiality Assessment: How It Actually Works

Double materiality is the conceptual and procedural centerpiece of ESRS — and the element most frequently misunderstood by companies transitioning from TCFD or ISSB reporting. Getting it wrong at this stage creates cascading problems: either over-reporting (expensive and distracting) or under-reporting (an audit and liability risk).

The Two Dimensions

Financial materiality (outside-in) asks: do sustainability issues affect the company's financial position, performance, cash flows, or cost of capital? This is the dimension most familiar to companies with TCFD experience. It captures risks and opportunities that sustainability trends, physical climate events, or regulatory shifts create for the business.

Impact materiality (inside-out) asks something categorically different: does the company's activity create significant actual or potential impacts on people or the environment — regardless of whether those impacts are (yet) financially material to the company itself? A manufacturing company whose suppliers use child labor in high-risk regions faces impact materiality under ESRS S2 even if no financial consequence has materialized to date.

A topic is material under ESRS if either dimension reaches the materiality threshold. This is an "or" logic, not an "and" logic. The practical consequence is a substantially broader reporting scope than most companies anticipate based on prior voluntary framework experience.

What a Double Materiality Assessment Requires in Practice

The ESRS establish double materiality as a mandatory, evidence-based process — not a perception-based exercise. This is a deliberate departure from the way many companies conducted materiality assessments under GRI or similar frameworks, where stakeholder opinion surveys were the primary input. ESRS require that materiality conclusions be backed by documented evidence or justified assumptions.

The process typically involves four phases:

1. Scoping: Map the company's activities, value chain, and business relationships. Identify the universe of potentially relevant sustainability topics across E, S, and G dimensions.
2. Stakeholder engagement: Identify which stakeholder groups are impacted by the company and which can affect it. ESRS place significant emphasis on structured stakeholder engagement — affected communities and value chain workers are explicitly required considerations, not optional inputs.
3. Impact, risk, and opportunity identification: For each potentially relevant topic, document actual and potential impacts (positive and negative), financial risks, and financial opportunities. Assess severity of impacts (scale, scope, irremediability) and likelihood of financial effects.
4. Materiality determination: Apply the double materiality thresholds to each topic. Document the conclusions and the basis for them. Topics assessed as non-material require explicit explanation.

The amended ESRS introduced in late 2025 streamline this process through a clearer top-down approach and explicit aggregation options. Companies that completed a 2024 or 2025 double materiality assessment may need to review their methodology against the updated criteria — particularly the definitions of severity thresholds and the treatment of non-material topics.

For companies beginning this process, a structured ESG integration approach that sequences the materiality assessment before any reporting infrastructure decisions is significantly more efficient than building systems first and determining scope afterward.

What Gets Triggered by Materiality

Once a topic is assessed as material, the corresponding topical ESRS applies in full. This includes disclosure requirements on policies, targets, actions, metrics, and governance arrangements for that topic. The output of the double materiality assessment therefore directly determines the scope and complexity of your ESRS report — making it the single most consequential step in the entire reporting process.

A well-executed double materiality assessment also provides strategic insight beyond compliance. Understanding which sustainability issues are genuinely material to your business — in both directions — is useful input for strategy development, ESG strategy implementation, and investor communications. The exercise tends to surface topics that management intuition may have underweighted.

CSRD Reporting Timeline and Compliance Deadlines

The CSRD implementation timeline has been modified significantly by the 2025 Omnibus Package, described in detail below. The following reflects the current state as of early 2026, incorporating both the original phased rollout and the Omnibus I adjustments.

Wave 1: Large Companies Previously Subject to NFRD (Reporting Year 2024)

Companies that were already subject to the Non-Financial Reporting Directive (NFRD) — broadly, large listed companies, banks, and insurers with more than 500 employees — were required to publish their first CSRD-compliant report in 2025, covering the 2024 financial year. This wave continues to report under the original ESRS, with the July 2025 quick-fix reliefs applied, through reporting years 2024–2026. The amended ESRS are expected to apply from 2027 onward for Wave 1 companies.

Wave 2: Large EU Companies (Reporting Year 2025)

Large EU companies not previously subject to NFRD — those exceeding two of three criteria (250+ employees, €25M+ balance sheet, €50M+ turnover) — were originally scheduled to report from 2026 covering financial year 2025. The Omnibus Package has modified the threshold significantly: CSRD sustainability reporting is now targeted at companies with more than 1,000 employees and more than €450 million net annual turnover. Companies that fall below the new thresholds are no longer in scope for mandatory CSRD reporting under the revised framework, though they may still face indirect reporting obligations through value chain data requests from larger customers.

Wave 3: Listed SMEs (Reporting Year 2026)

Listed small and medium-sized enterprises were scheduled to begin reporting on their 2026 financial year from 2027, with an optional two-year opt-out available. The Omnibus changes have further delayed or narrowed this wave — the operational detail depends on final legislative text, which was still being finalized at the time of writing.

Wave 4: Non-EU Companies (Reporting Year 2028)

Non-EU companies generating more than €150 million in annual turnover within the EU and operating at least one large EU subsidiary or EU branch are required to submit their first report covering the 2028 financial year, published in 2029. Separate ESRS standards for non-EU companies are being developed by EFRAG, with adoption postponed to June 2026.

What the Timeline Means Operationally

For companies in scope for Wave 2 under the revised thresholds, the window between now and the first reporting deadline is tighter than it appears. A full first-year ESRS report requires completing the double materiality assessment, establishing data collection systems across the relevant topical standards, engaging external assurance providers, and integrating the sustainability statement into the management report. These are not parallel tasks that can be compressed into a few months.

A realistic implementation timeline for a company starting from scratch runs 12–18 months for first-year reporting. The double materiality assessment alone typically takes two to four months when done rigorously. For companies that have already started, the priority is ensuring the methodology aligns with the amended ESRS criteria rather than optimizing for the original datapoint set.

ESRS for Non-EU Companies and Global Supply Chains

The reach of ESRS extends well beyond EU-headquartered companies. US and other non-EU multinationals face two distinct exposure scenarios, and conflating them leads to either over-preparation or missed obligations.

Direct Obligation: Non-EU Companies with Significant EU Revenue

Non-EU companies generating more than €150 million in annual net turnover within the EU and operating at least one large EU subsidiary or EU branch with revenues exceeding €40 million fall within the direct scope of CSRD. The reporting obligation applies at the consolidated group level, covering the 2028 financial year (first report published in 2029). EFRAG is developing sector-specific ESRS standards for this category, with adoption expected by June 2026.

For a US-headquartered company with significant European operations, this is a direct compliance obligation — not a supply chain consideration. The consolidated report can cover all EU subsidiaries, which simplifies the structural question but does not reduce the substantive reporting scope.

Estimates suggest that approximately 900 non-EU companies will fall within the direct scope of related EU sustainability legislation, including US-based multinationals with substantial EU operations. The preparation lead time required is comparable to that for EU companies — likely 12–18 months for the first report — which means that non-EU companies with 2028 obligations should be engaging with the process in 2026 or 2027 at the latest.

Indirect Pressure: Value Chain Data Requests

The second exposure scenario is broader and affects many more companies. Under ESRS S2 and related value chain disclosure requirements, large EU companies subject to CSRD must report on material impacts and risks in their value chains. This creates a cascade of data requests flowing to suppliers, regardless of whether those suppliers are themselves in scope for CSRD.

A non-listed SME supplying to a large EU retailer, or a US-based manufacturer supplying to a European automotive company, may receive structured ESG questionnaires derived from ESRS requirements. The ESRS standards acknowledge this challenge — the text explicitly addresses the difficulties companies face in gathering value chain information from suppliers not themselves subject to CSRD. Proportionality is built into the framework, but proportionality does not mean absence of data requests.

Companies in this position should engage proactively with their major EU customers' sustainability teams to understand what specific data points are being requested and on what timeline. The ESG questionnaire landscape is becoming more standardized, which makes preparation more tractable than it was two or three years ago.

Regulatory Divergence Risk

Non-EU companies operating across multiple jurisdictions face the additional complexity of divergent sustainability reporting requirements. EU ESRS, SEC climate disclosure rules (where they remain in force), and ISSB standards create overlapping but non-identical obligations. The good news is that ESRS was designed with interoperability in mind — many ESRS disclosures are compatible with or subsume TCFD and partial ISSB requirements. The gap between ESRS and ISSB is narrower on the financial materiality dimension; it is the impact materiality dimension that creates additional EU-specific obligations with no direct equivalent elsewhere.

ESRS Assurance Requirements: Limited vs. Reasonable Assurance

Assurance is the feature of ESRS that most sharply distinguishes it from voluntary ESG frameworks — and the one most likely to catch companies off guard if they treat it as an afterthought.

Limited Assurance: The Baseline Requirement

All companies in scope for CSRD must obtain limited assurance on their ESRS sustainability statement from their first reporting year. There is no grace period for assurance. This applies to the ESRS disclosures themselves, the underlying double materiality assessment process, EU Taxonomy-related disclosures, and the digital tagging of sustainability information.

Limited assurance does not mean light-touch review. It means the assurance provider performs sufficient procedures to conclude with moderate confidence that the information is free from material misstatement. In practice, this involves reviewing the design and operation of internal processes, testing selected data points, and evaluating the basis for materiality conclusions. Compared to financial audit, the procedures are less extensive — but compared to what most companies have previously experienced from voluntary ESG assurance, the rigor is substantially higher.

The Transition to Reasonable Assurance

CSRD originally envisaged a transition from limited to reasonable assurance within a defined timeframe. The 2025 Omnibus provisional agreement has modified this pathway: the option to require reasonable assurance by mandate has been removed from the immediate legislative agenda, and the deadline for adopting limited assurance standards has been postponed from October 2026 to July 2027. A practical transitional pathway has been preserved for third-country auditors during the early years while longer-term equivalence determinations are made.

Reasonable assurance — the standard applied in a financial statement audit — represents a higher level of assurance but still falls short of absolute certainty. The direction of travel remains toward higher assurance standards over time; the timeline has simply been adjusted to reflect the practical challenges of building assurance capacity across thousands of companies simultaneously.

What This Means for Preparation

The assurance requirement has significant operational implications. Audit-ready data means documented data collection processes, clear ownership, version control, and the ability to explain and evidence each reported figure. Companies that build their ESRS reporting on spreadsheet-based data collection without clear governance will find limited assurance engagements expensive and stressful.

Engaging your assurance provider early — ideally during the double materiality assessment phase — is one of the most practical pieces of advice from implementation experience. Assurance providers have views on what constitutes audit-ready documentation, and building processes that align with those expectations from the outset is significantly cheaper than retrofitting them under deadline pressure. Anyone who has been through a financial audit knows that the documentation standards expected are non-trivial — ESRS assurance is moving in the same direction.

For companies also navigating EU Taxonomy alignment reporting, assurance coverage extends to those disclosures as well — adding another dimension to the data quality requirements.

The 2025 Omnibus Package: What Has Actually Changed

The 2025 Omnibus Package is real and consequential — but its significance is frequently overstated in both directions. Some companies are treating it as an effective cancellation of CSRD. Others are dismissing it as noise. Neither response is accurate.

What Has Changed

The most significant change is the upward revision of the company size threshold. CSRD reporting is now targeted at companies exceeding both 1,000 employees and €450 million net annual turnover. This is a substantial reduction in the number of companies with direct CSRD obligations compared to the original framework. Under the original thresholds, hundreds of thousands of EU companies were expected to fall in scope. Under the revised thresholds, the number is significantly smaller.

Additional Omnibus changes include: a two-year postponement for Wave 2 and Wave 3 companies (providing temporary relief for large companies not previously subject to NFRD and for listed SMEs); the removal of the mandatory transition to reasonable assurance; and the 61% reduction in mandatory datapoints through the amended ESRS, targeted for application from 2027.

What Has Not Changed

The fundamental architecture of ESRS remains intact. The double materiality principle, the 12-standard structure, the assurance requirement from the first reporting year, and the director liability provisions are all unchanged. Wave 1 companies — those previously subject to NFRD — continue to report under the current obligations without delay.

Perhaps more importantly: the indirect pressure on companies below the direct thresholds has not diminished. Large companies in scope for CSRD still need value chain data from their suppliers. Banks and investors still require ESG information for financing and due diligence purposes. The market expectation around sustainability disclosure is not retreating because the regulatory threshold has moved.

From a strategic standpoint, the Omnibus changes reduce the compliance pressure on mid-sized companies but do not reduce the commercial incentive to build credible ESG reporting capability. The two are worth keeping analytically separate. Sustainability reporting driven by investor relations, procurement requirements, and market positioning operates on a different logic than compliance-driven reporting — and the Omnibus changes affect only the latter.

There is also a risk dimension to the regulatory retreat that deserves acknowledgment. Large-scale reductions in the scope of companies required to report creates data gaps across value chains and reduces the quality of information available to financial markets for risk assessment. Critical climate and biodiversity data points that disappear from mandatory reporting do not disappear as underlying risks — they simply become less visible and less comparable. This is relevant for any company using ESG data for investment decisions or ESG due diligence in a VC or private equity context.

ESRS, TCFD, and ISSB: What the Differences Mean Strategically

Companies with existing TCFD or ISSB reporting often ask how much of that work translates to ESRS. The honest answer is: more than starting from zero, but less than most people hope.

Where TCFD Experience Transfers

TCFD's four-pillar structure — governance, strategy, risk management, metrics and targets — maps reasonably well onto ESRS 2 general disclosures and ESRS E1 climate change requirements. If you have done serious scenario analysis for TCFD, that work is directly relevant to the ESRS E1 physical and transition risk requirements. Climate governance disclosures prepared under TCFD translate without major restructuring.

The ISSB standards (IFRS S1 and S2) go further than TCFD and have stronger structural alignment with ESRS on the financial materiality dimension. Companies already reporting under ISSB standards have significantly less gap to close than those starting from TCFD alone.

Where ESRS Goes Further

The fundamental gap is impact materiality. Neither TCFD nor ISSB requires companies to assess and disclose their impacts on people and the environment as an independent reporting trigger. Under ESRS, impact materiality is not a refinement of financial materiality — it is a separate and equally weighted dimension that can independently trigger disclosure obligations across all ten topical standards.

This means that a company with a well-developed TCFD report covering climate financial risks may still face significant ESRS gaps on: impacts on communities in the supply chain (ESRS S3), biodiversity impacts from land use (ESRS E4), workforce conditions for contractors and agency workers (ESRS S1/S2), and business conduct in high-risk markets (ESRS G1) — none of which are captured under investor-centric financial materiality frameworks.

The scope of required disclosures also differs. ESRS requires quantitative targets, detailed action plans, and granular metrics across all material topics. TCFD is primarily narrative and risk-oriented. ISSB is moving toward greater quantification but remains less prescriptive than ESRS on specific datapoints.

For companies that have invested in comprehensive sustainability reporting under voluntary frameworks, the strategic question is not whether prior work is useful — it is — but where the gaps are and how to prioritize closing them within the amended ESRS datapoint structure.

Practical Implementation Considerations

Implementation is where abstract regulatory requirements meet organizational reality, and the gap between the two is consistently larger than companies anticipate. A few observations from practice.

Scope 3 and Value Chain Data

The most consistently underestimated implementation challenge is Scope 3 emissions and value chain data collection under ESRS E1 and S2. For most companies, direct operations are manageable. The value chain — suppliers, logistics, use-phase emissions, end-of-life — is where data quality degrades rapidly. Companies that have already worked through Scope 3 emissions measurement and reduction strategies are better positioned than those encountering this for the first time.

The amended ESRS reduce the mandatory datapoint burden, but the fundamental requirement to report on value chain impacts — where material — remains. The question is not whether to collect value chain data but how to do so efficiently and with defensible methodology.

Greenwashing Risk in ESRS Context

ESRS disclosures, being audited and legally binding, create a greenwashing risk that voluntary framework disclosures do not. A sustainability claim that is directionally correct but lacks the documentation required for limited assurance is an audit finding, not just a credibility issue. Companies that have built ESG communications primarily for marketing purposes — rather than to reflect verified, auditable underlying data — will find the ESRS assurance process a significant adjustment. The transition from greenwashing to credible ESG communication is not merely a reputation management issue under ESRS; it has legal dimensions.

Technology and Tooling

The ESRS datapoint reduction from the November 2025 amendment changes the calculus on software investment. Under the original ESRS, the sheer volume of mandatory datapoints made dedicated software almost unavoidable for large companies. Under the amended framework, more companies can manage their first-year reporting with structured data collection processes without enterprise software — though the scalability and audit trail benefits of purpose-built tools remain real. Companies evaluating this tradeoff should assess the amended datapoint requirements before committing to significant software implementation budgets.

The VC and Investor Perspective

For portfolio companies and startups, ESRS creates a reporting expectation that flows from investors as well as regulators. Article 8 and Article 9 fund managers under SFDR have their own ESG disclosure obligations, and they increasingly require investee company data that maps to ESRS or equivalent standards. Understanding how to position for Article 9 fund investment increasingly means demonstrating ESRS-compatible data infrastructure, even for companies well below the direct CSRD thresholds. This is a case where market pressure runs ahead of regulatory obligation — and preparing for it proactively creates real competitive differentiation in fundraising contexts.

For VC funds themselves, the methodological toolbox for impact measurement is evolving rapidly in parallel with ESRS. The interplay between portfolio-level ESG data aggregation and ESRS-compatible reporting is a design challenge that funds managing diverse portfolios are working through in real time.

FAQ

What are the 12 ESRS standards and which ones are mandatory?

The 12 ESRS standards consist of two cross-cutting standards (ESRS 1 and ESRS 2) that are mandatory for all in-scope companies, and ten topical standards covering Environmental (ESRS E1–E5), Social (ESRS S1–S4), and Governance (ESRS G1) topics. The topical standards apply only where the relevant topic is found material through the double materiality assessment. If a topic is not material, the company must explain why — and that explanation is itself an auditable disclosure.

What is the difference between ESRS and CSRD?

CSRD (Corporate Sustainability Reporting Directive) is the EU law that establishes which companies must publish a sustainability report and under what governance conditions. ESRS (European Sustainability Reporting Standards) are the technical reporting standards that specify what must be disclosed and how. CSRD determines whether you have an obligation; ESRS defines how you fulfill it. The relationship is analogous to a law requiring financial statements (CSRD) and the accounting standards those statements must follow (ESRS).

How does the double materiality assessment work in practice?

The double materiality assessment requires companies to evaluate each sustainability topic through two lenses: financial materiality (does this issue create risks or opportunities for the company's financial performance?) and impact materiality (does the company's activity create significant impacts on people or the environment?). A topic is material if either threshold is met — it is an "or" logic, not "and." The assessment must be evidence-based and documented, covering the full value chain. Stakeholder engagement is a required input, not optional. The conclusions determine which of the ten topical ESRS standards apply in full.

What are the current CSRD compliance deadlines after the 2025 Omnibus Package?

Wave 1 companies (previously subject to NFRD) are reporting now, covering the 2024 financial year. Under the revised Omnibus thresholds, mandatory CSRD reporting now targets companies with more than 1,000 employees and more than €450 million net annual turnover. Wave 2 timelines have been delayed by two years. Non-EU companies with more than €150 million in EU turnover and at least one large EU subsidiary face a first reporting obligation covering the 2028 financial year, with the first report published in 2029. Companies below the revised thresholds are no longer directly in scope but may still face indirect reporting pressure through value chain data requests from large customers.

Do ESRS apply to non-EU companies?

Yes, in two ways. Directly: non-EU companies generating more than €150 million in annual EU turnover with at least one large EU subsidiary or branch will be required to report under CSRD-equivalent ESRS standards covering the 2028 financial year. EFRAG is developing separate standards for this category. Indirectly: non-EU companies that are suppliers to large EU companies in CSRD scope will receive value chain data requests derived from ESRS requirements, regardless of their own regulatory status. The scale and specificity of these indirect requests is increasing as EU companies build out their ESRS reporting infrastructure.

What are the ESRS assurance requirements?

All companies in scope for CSRD must obtain limited assurance on their ESRS sustainability statement from their first year of reporting. There is no grace period. Limited assurance covers the ESRS disclosures, the double materiality assessment process, EU Taxonomy disclosures, and digital tagging. The 2025 Omnibus provisional agreement removes the previous option to mandate a transition to reasonable assurance, and postpones the deadline for adopting limited assurance standards to July 2027. In practice, limited assurance requires audit-ready documentation, clear data governance, and processes that can be independently verified — significantly more rigorous than what most companies have experienced under voluntary ESG reporting.

How do ESRS compare to TCFD and ISSB standards?

TCFD experience transfers most directly to ESRS 2 general disclosures and ESRS E1 climate change requirements. ISSB standards (IFRS S1 and S2) have stronger alignment with ESRS on the financial materiality dimension. The fundamental gap is impact materiality: neither TCFD nor ISSB requires companies to assess and disclose their impacts on people and the environment as an independent disclosure trigger. Under ESRS, impact materiality is a separate and equally weighted dimension that can independently trigger full disclosure obligations across all ten topical standards. Companies with existing TCFD or ISSB reporting have a meaningful head start but should not assume their prior work closes the ESRS gap.