The European Union has introduced a series of directives to help businesses reach sustainability goals, as part of the EU-wide ambition of becoming climate-neutral by 2050. Two of the most widely discussed are the Corporate Sustainability Reporting Directive (CSRD) and the Corporate Sustainability Due Diligence Directive (CSDDD). Designed to complement each other, the two directives share a common purpose but differ in important ways.

A Shared Aim

Both directives are part of the EU's broader effort to drive corporate accountability on sustainability. The CSRD provides companies with a framework for measuring and managing their impacts, risks, and opportunities, centred on the concept of double materiality, reflecting both the impact of sustainability issues on the company, and the company's impact on people and the environment. It covers a wide range of topics and culminates in an annual sustainability report that companies are required to publish publicly.

The CSDDD entered into force in July 2024, with a phase-in process running from 2027 to mid-2029. It requires companies to implement specific due diligence processes addressing their impacts on human rights and the environment not only within their direct operations, but across their entire value chain, including subsidiaries, partners, and other stakeholders with a material impact on the business.

Both directives emphasise transparency and accountability. Companies subject to either must demonstrate meaningful efforts to measure, manage, and disclose their impacts, risks, and opportunities.

Differing Reporting Requirements

Although the two directives differ in focus, they were deliberately designed to overlap rather than create parallel, entirely separate compliance workstreams.

The CSRD is a reporting directive — it sets out what companies must disclose about their operations and management approaches. Reporting is aligned with the European Sustainability Reporting Standards (ESRS), which cover Environmental, Social, and Governance topics. Each company identifies its material topics, assesses them based on double materiality, and publishes a comprehensive annual sustainability report structured similarly to a financial report.

The CSDDD is an action-oriented directive it requires companies to put specific processes in place, holding them accountable for their business conduct and setting a higher standard for due diligence. Its core requirement is the identification of actual and potential adverse human rights and environmental impacts across the upstream and downstream value chain. When both directives apply to the same company, reporting obligations can be combined into a single report, as the information required significantly overlaps.

Revised Scope: What Has Changed

The CSRD's scope has been significantly revised under the EU's Omnibus I package, signed into law in February 2026. The original tiered structure — which would have brought in companies with 250+ employees or listed SMEs — has been replaced with a narrower set of thresholds.

A notable alignment has emerged from the Omnibus reforms: the CSRD and CSDDD now share broadly similar scope thresholds, making it easier for companies to manage both directives in an integrated way.

The Complementary Nature of the Two Directives

For companies subject to both directives, there is significant overlap in the information required, and it is strongly recommended not to treat them as separate compliance exercises. Data gathered for CSRD reporting — particularly on value chain risks and due diligence processes — will often directly satisfy CSDDD requirements as well.

The key distinction remains one of focus. The CSRD provides a comprehensive overview of impacts both on and by the company across all ESG topics. The CSDDD zooms in specifically on human rights and environmental impacts in the upstream and downstream value chain, and places the emphasis on taking action not just reporting.

Key Takeaways

There are many misconceptions about sustainability directives adding complexity without reward. In practice, companies subject to more than one directive often find significant overlap in requirements, making data management and reporting more efficient than expected and yielding genuine insight into operations and the value chain in the process.

These directives are also an opportunity to redefine how your company measures success. Transparency and accountability carry more commercial weight than ever before. Used strategically, compliance with both the CSRD and CSDDD can become a genuine competitive advantage.