ESG Due Diligence

An ESG due diligence systematically evaluates three dimensions: Environmental (climate risks, carbon emissions, resource consumption), Social (labor rights, supply chain standards, diversity) and Governance (compliance structures, anti-corruption, transparency). The assessment includes regulatory conformity with CSDDD, EU Taxonomy, CSRD and SFDR as well as a financial risk and opportunity evaluation. The result is a quantified ESG scoring with a concrete action plan.

The EU Corporate Sustainability Due Diligence Directive (CSDDD) requires companies with more than 3,

000 employees and EUR

900 million turnover to conduct sustainability due diligence from 2028. From 2029, this applies to companies with 1,000+ employees and EUR

450 million turnover. Additionally, national laws like the German Supply Chain Act (LkSG) already mandate supply chain due diligence for companies with 1,000+ employees since 2023. Smaller companies also benefit, as investors and business partners increasingly require ESG compliance.

The process follows five phases: 1) Define scope and ESG KPIs, 2) Collect data on environmental metrics, social practices and governance structures of the target company, 3) Risk analysis and materiality assessment per internationally recognized standards (GRI, OECD Guidelines), 4) Quantify financial impacts of identified ESG risks and opportunities, 5) Develop an action plan with integration recommendations for the post-merger phase.

The costs of inadequate ESG assessment are substantial: CSDDD violations can result in fines of up to 5% of global net turnover. Under the German LkSG, penalties reach up to 2% of annual revenue plus exclusion from public procurement. Beyond fines, companies face reputational damage, restricted capital access and value reduction in M&A transactions. Investors systematically discount non-ESG-compliant companies by 10‑20% of enterprise value.

Traditional due diligence primarily examines financial, legal and tax risks. ESG due diligence expands this assessment to include environmental risks (climate impacts, resource dependencies), social factors (labor conditions in the supply chain, human rights) and governance aspects (compliance culture, sustainability reporting). Integrating both perspectives is now standard: 94% of institutional investors conduct ESG analyses as part of their transaction assessments.

Multiple regulations currently apply in parallel: The German Supply Chain Due Diligence Act (LkSG) since 2023, the EU Taxonomy Regulation for sustainable investments, CSRD for sustainability reporting and SFDR for financial products. CSDDD must be transposed into national law by July 2026. Companies need to align their due diligence processes with these overlapping requirements — particularly risk identification, reporting obligations and supply chain due diligence duties.

Small and mid-sized companies may not fall directly under CSDDD thresholds, but they are indirectly affected as suppliers to large corporations: contracting companies must demonstrate ESG compliance in their supply chain and pass these requirements downstream. Early ESG assessment secures business relationships, improves negotiating position for financing and reduces the risk of unexpected compliance costs. The ESG due diligence market is growing at 14% annually — signaling this practice is becoming standard.