The Omnibus Simplification to CSRD: A Step Forward or a Step Back?

What is the Omnibus Simplification?

The proposed Omnibus Simplification to the Corporate Sustainability Reporting Directive (CSRD) has divided opinion across the sustainability world. Announced by the European Commission in early 2025, the proposal aims to reduce the reporting burden on companies by narrowing the scope of mandatory disclosures and delaying implementation timelines for certain categories of businesses.

The original CSRD, adopted in 2022, was the most ambitious corporate sustainability reporting regulation ever enacted. It required approximately 50,000 companies across the EU to report against the European Sustainability Reporting Standards (ESRS) — a framework covering climate change, biodiversity, water, workforce conditions, business conduct, and the full value chain. The first wave of reporting obligations took effect in 2024 for the largest public-interest entities, with subsequent waves expanding to cover smaller companies through 2028.

The Omnibus proposal changes the trajectory significantly. Key modifications include raising the employee threshold from 250 to 1,000 for mandatory reporting (removing an estimated 80% of companies from the directive's scope), reducing the number of mandatory data points in the ESRS from over 1,100 to a core set of approximately 250, extending transition periods for Scope 3 value chain reporting by two years, and introducing a voluntary 'light' reporting framework for companies that fall below the new thresholds.

The debate over whether these changes represent pragmatic refinement or a fundamental retreat from ambition has become one of the defining discussions in European sustainability policy.

The case for simplification

There is a genuine and defensible argument that the original CSRD scope was too broad, too fast, and too complex for many of the companies it captured.

Consider a mid-sized German manufacturer with 300 employees and €50 million in revenue. Under the original CSRD timeline, this company would need to conduct a double materiality assessment, implement data collection processes across all ESRS topics, engage an external assurance provider, and produce a comprehensive sustainability report — potentially costing €200,000-500,000 in the first year. For a company of this size, that represents a material investment that may not yield proportionate environmental benefit.

The full ESRS framework, with over 1,100 data points, was designed to provide comprehensive transparency across all environmental and social topics. But comprehensiveness comes at a cost. Companies struggled to find qualified people to lead the work. Consultancy firms charged premium rates for CSRD readiness assessments. Software vendors rushed products to market that were not yet mature. The net result, in many cases, was that resources were spent on compliance architecture rather than on actual sustainability improvements.

Simplification could refocus the directive on its original intent: ensuring that the largest companies with the greatest environmental impact provide meaningful, comparable, decision-useful sustainability disclosures. If a smaller company's disclosure costs more than the environmental value it generates, the directive is not working as intended.

The reduced core data points also address a legitimate criticism of the full ESRS: that reporting organisations were drowning in disclosure requirements without clear prioritisation. A focused set of core metrics — covering the most material climate, environmental, and social topics — may actually produce better, more comparable data than a comprehensive framework that companies struggle to implement properly.

The risk of watering down ambition

However, the Omnibus changes carry real risks that the sustainability community has rightly flagged.

The most significant concern is the Scope 3 delay. Value chain emissions typically account for 70-90% of a company's total carbon footprint. For a retailer, Scope 3 includes the emissions embedded in every product on their shelves. For a manufacturer, it includes the emissions from raw material extraction, logistics, and end-of-life treatment. Delaying mandatory Scope 3 disclosure by two years means delaying the visibility, accountability, and pressure that drives companies to engage their supply chains on emissions reduction.

Raising the threshold to 1,000 employees removes the vast majority of European companies from mandatory reporting. While these companies individually have smaller footprints, collectively they represent a significant portion of economic activity and emissions. More practically, many of these mid-sized companies are suppliers to the large companies that remain in scope — and without their own reporting obligations, the incentive structure for supply chain engagement weakens.

There is also a signals problem. The original CSRD sent a clear message: sustainability disclosure is becoming as fundamental as financial disclosure. The Omnibus proposal, regardless of its technical merits, risks being interpreted as a retreat — a signal that the political will for comprehensive sustainability regulation is weakening.

What this means for UK organisations

For UK-based organisations, the CSRD Omnibus creates a complex landscape to navigate. Companies with EU subsidiaries or significant EU operations may still fall within CSRD scope — but the scope is now narrower and the timeline is longer. The interaction between a simplified CSRD and the anticipated UK Sustainability Reporting Standards (UK SRS) adds another layer of uncertainty.

The UK Government has signalled that UK SRS will align with the ISSB standards (IFRS S1 and S2) rather than the ESRS, creating a divergence between UK and EU reporting requirements that multinational companies will need to manage.

The practical advice for UK organisations remains consistent regardless of how the regulatory landscape evolves:

1. Build your data infrastructure now. Whether CSRD narrows or UK SRS expands, you will need reliable, auditable emissions data across Scopes 1, 2, and 3. 2. Do not wait for final regulations to begin Scope 3 work. The supply chain engagement required for meaningful Scope 3 data takes 12-18 months to build. Starting now ensures you are ready when obligations crystallise. 3. Adopt a framework-agnostic data platform. Your underlying data should be able to serve multiple reporting frameworks — SECR, CSRD, ISSB, CDP — without re-collection or re-processing. 4. Focus on decision-useful reporting. Regardless of what regulators require, producing clear, honest sustainability data that informs operational decisions and stakeholder engagement is valuable in its own right.

The goalposts may move. The fundamentals of good carbon accounting do not.