Written by Graham Paul – Service Delivery Director
With over twenty years of experience in the energy sector, Graham leads service delivery, sales and marketing to enhance customer experience and scale TEAM’s carbon and energy services with a data‑driven, outcomes focus.
The European Union has officially finalised the revised European Sustainability Reporting Standards (ESRS), providing long-awaited clarity for organisations preparing for Corporate Sustainability Reporting Directive (CSRD) compliance. With the final text now published in the Official Journal of the European Union, the revised standards will enter into force on 10 November 2026 and apply to reporting periods beginning on or after 1 January 2027.
For organisations with operations, customers, investors, or supply chain relationships in the EU, this announcement removes much of the uncertainty that has surrounded sustainability reporting requirements over the past year and marks a significant milestone in the EU’s wider Omnibus simplification reforms.
Key Takeaway
The revised European Sustainability Reporting Standards (ESRS) provide greater certainty for organisations preparing for future sustainability reporting requirements. For organisations within scope, or affected through EU operations and reporting relationships, the priority is to confirm applicability, review sustainability data and governance arrangements, and identify gaps ahead of the revised requirements.
Watch this short video for an overview of the revised European Sustainability Reporting Standards (ESRS), what the changes mean for organisations, the implications for UK organisations, and the key dates and considerations covered in our Market Briefing.
What Has Been Announced?
The final Delegated Act has now been published in the Official Journal of the European Union and the revised ESRS will enter into force on 10 November 2026.
This means that companies within the scope of CSRD will be expected to report against the revised ESRS for financial years beginning in 2027, with the first mandatory reports published in 2028.
Organisations may choose to apply the revised ESRS early for financial years beginning during 2026, enabling reporting teams to align their processes and disclosures before mandatory application begins for financial years starting on or after 1 January 2027.
Why This Matters
The publication of the final standards provides much-needed certainty for organisations that have been monitoring the evolution of EU sustainability reporting requirements. Rather than continuing to prepare for multiple potential scenarios, reporting teams can now confidently plan around a confirmed framework.
The revised ESRS form part of the EU’s broader effort to simplify sustainability reporting while maintaining transparency for investors and stakeholders. Organisations reviewing their wider approach can also explore our guide to sustainability reporting and the principal reporting frameworks. The Omnibus reforms seek to reduce unnecessary administrative burden and make reporting obligations more proportionate, particularly for organisations that have raised concerns about the complexity of the original requirements.
Across sustainability reporting projects, TEAM Energy consultants increasingly see organisations focusing on governance, data ownership, data quality and auditability rather than disclosure production alone. This includes establishing clear ownership of sustainability data, understanding its source and maintaining consistent reporting methodologies. As reporting requirements mature, organisations are paying greater attention to the quality, traceability and consistency of sustainability data used for external reporting.
Implications for UK Organisations
Although the CSRD is an EU directive, UK organisations should not assume that they are unaffected, particularly where they have qualifying EU operations or form part of a group that falls within the Directive’s scope.
UK organisations may fall within scope where they have qualifying EU operations or form part of a group that meets the applicable CSRD thresholds. Under the revised rules, mandatory reporting is principally focused on EU undertakings and groups with more than 1,000 employees and net annual turnover above €450 million. Separate conditions apply to non-EU groups, including UK-headed groups, based on the group’s EU turnover and the presence of a qualifying EU subsidiary or branch.
Supplying an organisation that reports under CSRD does not, by itself, bring a UK supplier directly within scope. However, suppliers may still receive requests for sustainability information from customers, investors and procurement bodies as part of those organisations’ reporting and due-diligence processes.
As a result, even organisations not directly reporting under the CSRD may face increasing requests from customers, investors, and procurement bodies for robust sustainability data.
This trend mirrors developments already seen in the UK, where requirements such as SECR, ESOS, climate-related financial disclosures, and emerging sustainability reporting frameworks are driving greater scrutiny of environmental and social performance.
A Move Towards Voluntary Reporting
One of the notable outcomes of the Omnibus reforms is the clearer distinction between mandatory and voluntary sustainability reporting.
Smaller organisations outside the mandatory scope of CSRD, particularly undertakings protected by the value-chain cap, can use the EU Voluntary Sustainability Reporting Standard. This provides a proportionate and structured way to communicate sustainability information and respond to requests from larger companies, investors and financial institutions without applying the full mandatory ESRS requirements.
For many organisations, particularly those seeking investment, bidding for contracts, or responding to customer sustainability questionnaires, voluntary reporting may offer a practical route to demonstrate transparency and readiness for future regulatory developments.
What Should Organisations Be Doing Now?
With the revised ESRS finalised, organisations should consider the next phase of preparation rather than waiting until reporting becomes mandatory. Organisations developing a structured sustainability reporting framework will be better positioned to manage governance, disclosures and sustainability data quality requirements.
Priority actions include:
- Reviewing whether the business falls within CSRD scope under the revised rules
- Assessing existing sustainability data collection processes
- Identifying gaps against the revised ESRS disclosure requirements
- Engaging finance, sustainability, and governance teams to establish reporting responsibilities
- Evaluating software, systems, and assurance requirements ahead of 2027 reporting cycles
- Considering voluntary adoption of the revised standards to build internal capability and stakeholder confidence.
Looking Ahead
The finalisation of the revised ESRS marks an important turning point in the evolution of sustainability reporting across Europe. After months of consultation, organisations now have a confirmed framework around which they can build their reporting strategies.
While the revised standards aim to simplify compliance, organisations should not underestimate the work required to establish reliable sustainability data, governance structures, and reporting processes. Those that begin preparing now are likely to be better positioned to meet future requirements and respond to growing stakeholder expectations around transparency and sustainability performance.
Key Dates at a Glance
10 November 2026
- Revised ESRS enter into force.
Financial years beginning during 2026
- Organisations may choose to adopt the revised ESRS early before mandatory application from 1 January 2027.
1 January 2027
- Revised ESRS become mandatory for reporting periods beginning on or after this date.
2028
- First mandatory reports under the revised ESRS are expected to be published.
Organisations preparing for future sustainability reporting obligations should ensure that governance, controls and sustainability data processes are established well in advance of reporting deadlines.
Official Sources
This Market Briefing is based on the final European Union legislation and guidance relating to the revised European Sustainability Reporting Standards (ESRS) and Corporate Sustainability Reporting Directive (CSRD). For further information, refer to the revised ESRS published on EUR-Lex, the European Commission’s Corporate Sustainability Reporting guidance and EFRAG’s information on the revised ESRS.