What Are the European Sustainability Reporting Standards (ESRS)?
The European Sustainability Reporting Standards (ESRS) are a set of mandatory sustainability disclosure standards developed by the European Financial Reporting Advisory Group (EFRAG) under the EU's Corporate Sustainability Reporting Directive (CSRD). They define how companies must report environmental, social, and governance (ESG) impacts, risks, and opportunities in a structured and auditable way, marking a major shift from voluntary ESG reporting to enforceable disclosure across the EU. The ESRS framework consists of 12 sector-agnostic standards: two cross-cutting standards (ESRS 1 General Requirements and ESRS 2 General Disclosures, which are mandatory for all) and ten topical standards covering climate change, pollution, water and marine resources, biodiversity, resource use and circular economy, own workforce, workers in the value chain, affected communities, consumers and end-users, and business conduct. Each topical standard contains detailed disclosure requirements and datapoints that companies must report if deemed material. A foundational principle running through all ESRS standards is double materiality. Companies must assess and report not only how sustainability issues affect their own financial position, but also how their business activities affect people and the planet through their value chains. This dual lens is mandatory for CSRD-in-scope companies and determines which of the hundreds of potential data points each organization must actually disclose. CSRD compliance is being phased in from 2024 through 2029 based on company size and prior reporting obligations. Large public-interest entities with more than 500 employees previously subject to the Non-Financial Reporting Directive (NFRD) began reporting on financial year 2024 data in 2025, with additional waves of larger and then smaller companies following in subsequent years. Ongoing EU Omnibus simplification proposals in 2025 have introduced amendments to scope thresholds and data point requirements, creating a dynamic regulatory environment that companies must monitor closely.
Since most environmental and social risks reside with suppliers rather than a company's own operations, procurement teams bear primary responsibility for collecting, managing, and validating the ESG data that ESRS reporting demands.
The ESRS make supply chains the focal point of corporate sustainability reporting. Most environmental and social risks sit with suppliers — whether it is carbon emissions, labor practices, or community impacts — meaning procurement plays a critical role in CSRD compliance. The principle of double materiality pushes procurement teams to map and monitor suppliers across multiple tiers, ensure traceable and auditable data, and engage suppliers on ESG policies, certifications, and performance so that reporting is both credible and compliant. For climate-related disclosures under ESRS E1, companies must report Scope 1, 2, and 3 greenhouse gas emissions. Scope 3 emissions — indirect emissions from upstream and downstream value chain activities — typically represent 70 to 90 percent of a manufacturing company's total emissions footprint, making deep supply chain visibility essential. ESRS E1 requires companies to use the GHG Protocol's Corporate Value Chain standard for Scope 3 calculations, and best practice calls for setting science-based targets that address these emissions directly. Social standards extend this supply chain imperative further. ESRS S2, Workers in the Value Chain, requires companies to cover labor rights and working conditions across suppliers and contractors — mapping risks such as forced labor, excessive working hours, and unsafe conditions. ESRS S3 requires assessment of impacts on affected communities, including land use, pollution, and displacement linked to supplier operations. Even governance standard ESRS G1 on Business Conduct addresses supplier management, anti-corruption frameworks, and supply chain due diligence. The cascading effect of CSRD through value chains means that even companies not directly subject to the directive will need to develop ESG data collection capabilities, as their customers increasingly incorporate CSRD readiness into supplier qualification and procurement criteria. Companies need processes to send, track, and follow up on supplier ESG questionnaires, assess supplier sustainability risks, and calculate Scope 3 category contributions across their entire network.
Each of the ten ESRS topical standards maps to specific supply chain risks and requires companies to collect distinct categories of supplier data with traceable, certification-backed evidence.
On the environmental side, ESRS E1 on climate change is the most critical standard and is subject to a rebuttable presumption — meaning companies must demonstrate they are not significantly affected by climate risk or report fully on it. Disclosures include Scope 1, 2, and 3 emissions, climate transition plans aligned with the Paris Agreement, and climate-related risks such as production disruptions from extreme weather. ESRS E2 covers emissions to air, water, and soil, hazardous substances, and waste impacts from both direct operations and value chain activities. ESRS E3 addresses freshwater and marine ecosystem impacts, requiring disclosure of water consumption, discharges, and risks to water systems linked to suppliers. ESRS E4 on biodiversity requires companies to disclose business impacts on species, habitats, and ecosystems, including supplier locations mapped to protected areas or high-risk geographies such as deforestation zones or agricultural frontiers. ESRS E5 on resource use and circular economy mandates disclosure of material use, recycling, waste reduction, and circularity practices, including supplier commitments to resource efficiency. The social standards demand equally rigorous supply chain data. ESRS S1 covers working conditions, diversity, pay equity, health and safety, and worker rights for a company's own workforce — requiring internal HR system data supplemented by broader labor practice benchmarks. ESRS S2, the most supply chain-intensive social standard, maps labor risks across contractors and suppliers, requiring direct workforce data from supplier surveys and risk scoring to surface high-risk suppliers. ESRS S3 uses geo-mapping to link supplier operations to local community risks such as pollution or displacement, with adverse media scanning to detect controversies tied to community harm. ESRS S4 requires disclosure of product safety, consumer accessibility, and social and environmental impacts on end-users, while ESRS G1 requires transparency on ethics, anti-corruption, lobbying, anti-competitive behavior, and compliance systems including supplier code-of-conduct enforcement. Across all these standards, data must be traceable, auditable, and backed by certifications, policies, or direct survey evidence from suppliers. Companies must establish dedicated ESG data governance structures, standardized data collection templates, and systematic information-sharing protocols with key suppliers to produce disclosures that can withstand external assurance review.
Achieving ESRS compliance requires companies to invest in multi-tier supplier mapping, structured data collection infrastructure, and cross-functional governance well before reporting deadlines arrive.
The first step toward ESRS compliance is conducting a thorough double materiality assessment (DMA) that maps value chain impacts from raw material sourcing through end-of-life. This process identifies which of the ten topical standards are material to the company's specific context and determines the exact data points the sustainability report must include. The DMA should be fact-based rather than perception-based — grounded in actual and potential impacts, risks, and opportunities supported by evidence — and must be documented thoroughly to support external assurance. Once material topics are identified, companies must build data collection infrastructure that spans their supply networks. This means deploying ESG platforms capable of sending, tracking, and following up on supplier questionnaires; automating collection of certifications such as ISO 14001 for environmental management; and integrating adverse media monitoring to flag supplier controversies in real time. Supplier risk scoring, tiered mapping, and geo-location analysis help prioritize engagement with the highest-risk suppliers in the value chain. For Scope 3 emissions specifically, companies should pursue supplier-specific primary data where possible, using industry-average or spend-based methods as secondary approaches where primary data is unavailable. Governance and cross-functional collaboration are equally important. CSRD compliance requires clear responsibility assignment at the board level and a coordinated team spanning sustainability, finance, procurement, legal, and operations. Each function plays a distinct role in collecting, validating, and reporting data on schedule. Establishing cross-functional committees that meet regularly to review sustainability performance, resolve data quality issues, and ensure ESRS alignment transforms reporting from a one-time exercise into a continuous operational process. Finally, companies should build adaptable programs that can absorb ongoing regulatory changes. The EU's Omnibus simplification proposals and CSDDD rollout create continuing uncertainty around specific obligations and timelines. Programs built on auditable, evidence-based supplier engagement — with flexible data architectures that can accommodate updated standards — will be best positioned to maintain compliance as the regulatory landscape evolves.
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