EU’s Simplified Sustainability Reporting Standards Become Final

Key Takeaways

• Revised ESRS Are Now Final: The EU has published its simplified European Sustainability Reporting Standards in the Official Journal, completing the formal adoption process.
• New Standards Apply From 2027: The regulation enters into force on November 10, 2026, and applies to financial years beginning on or after January 1, 2027.
• Reporting Requirements Have Been Cut: The revision significantly reduces datapoints while simplifying materiality assessments, value-chain reporting and the overall structure of the standards.
• Companies Get a 2026 Transition Option: Companies already subject to ESRS can use either the previous or revised standards for financial years beginning in 2026, with certain new reliefs also available under the previous framework.
• EU Reporting Regime Is Narrower: The revised ESRS form part of the broader Omnibus simplification effort, which has reduced the scope and reporting burden of the CSRD framework.

Deep Dive

More than a year after Brussels set out to make its sustainability reporting regime less burdensome, the revised European Sustainability Reporting Standards have made their way into the Official Journal. Commission Delegated Regulation (EU) 2026/1563 was published on September 21, replacing the existing ESRS annexes under Delegated Regulation (EU) 2023/2772. The regulation enters into force on November 10, 2026, and the revised standards will apply to financial years beginning on or after January 1, 2027.

It is the final legal step in a revision that began with a fairly simple political instruction and became an extensive exercise in deciding how much sustainability information companies really need to produce. The Commission's answer is considerably less than before.

The revision grew out of the EU's Omnibus simplification effort, launched in early 2025 amid concerns that the bloc's sustainability rules had become too costly and complicated. The changes have since reached much further than the standards themselves. EU lawmakers narrowed the population of companies subject to mandatory sustainability reporting, while the Commission set about rewriting what those companies would actually have to disclose.

EFRAG, which developed the original ESRS, was asked to produce technical advice for that second task. Its final proposal, submitted in December 2025, cut mandatory datapoints by 61% and total datapoints by more than 70% once voluntary disclosures were included. The Commission made its own changes before adopting the revised standards in July.

The finished regulation gives a fairly revealing account of what Brussels thought had gone wrong. The new ESRS reduce the number of datapoints, give greater weight to quantitative information over narrative text and draw a clearer line between mandatory and voluntary disclosures. They also provide new instructions for applying materiality, seek greater consistency with other EU legislation and, where possible, improve interoperability with global sustainability reporting standards. The structure and presentation of the standards themselves have been simplified as well.

This is still recognizably the European sustainability reporting regime. What has changed is the amount of machinery surrounding it. Double materiality remains at its center, requiring companies to consider both how sustainability matters affect the business and how the business affects people and the environment. But the Commission has tried to make that exercise less cumbersome, including through clearer materiality instructions and reliefs concerning value-chain information.

The Commission did not simply take EFRAG's final advice and place it into law. It made changes across a long and consequential list of subjects, including materiality assessments, fair presentation, aggregation and disaggregation, anticipated financial effects, greenhouse gas emissions, climate transition plans, microplastics, pollutants, substances of very high concern, asset management activities, human rights incidents and discrimination. It also made changes intended to preserve coherence with the EU's corporate sustainability due diligence rules.

That list matters because simplification can sound deceptively mechanical. Remove a datapoint here, shorten a disclosure there, and eventually the page count comes down. The harder work is deciding which information can disappear without weakening what the reporting regime is supposed to reveal. The final ESRS are the Commission's answer to that question, and they will now be tested not in consultation papers but in company reporting departments.

There is, however, some room between the old regime and the new one. Companies already subject to the ESRS can choose which version to use for financial years beginning between January 1 and December 31, 2026. They may apply the previous standards, as last amended in 2025, or move early to the revised standards. Companies that remain with the previous version can also make use of certain reliefs introduced by the new regulation, including provisions concerning double materiality assessments, acquisitions and disposals, metrics for non-significant activities, parts of value-chain reporting and the presentation of EU Taxonomy disclosures. Whichever route they take, they must say so in their sustainability statement.

The mandatory standards are only one side of the EU's redesigned reporting framework. The Commission also adopted a voluntary sustainability reporting standard for smaller companies in July, intended to give businesses outside mandatory CSRD reporting a more proportionate way to answer sustainability information requests from larger companies and financial institutions.

That distinction has become more important as the EU has narrowed the scope of mandatory reporting. The Omnibus reforms substantially reduced the number of companies caught by the CSRD, while introducing limits on the information larger reporting companies can seek from businesses further down their value chains. The voluntary standard is meant to provide the boundary for those requests rather than allowing the reporting obligations of large companies to migrate, piece by piece, onto smaller suppliers.

The publication in the Official Journal settles something companies have been waiting to know for more than a year. The debate over simplification will continue, as debates over European sustainability regulation invariably do, but the text itself is no longer provisional.

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