Transition Plans Under the New CSDDD: What Your Board Needs to Know Before 2027

The Corporate Sustainability Due Diligence Directive (CSDDD) introduces an obligation that goes significantly further than CSRD: companies are not merely required to disclose a transition plan — they must have one, implement it, and demonstrate board-level oversight of its execution.

This distinction matters enormously for corporate governance. Under CSRD, a credible-looking transition plan narrative satisfies disclosure requirements. Under CSDDD, the plan must be operationally real, linked to specific CapEx allocations, and subject to legal accountability if goals are not pursued. CSDDD phase-in begins in 2027 for the largest EU companies and qualifying non-EU entities, covering those with 1,000 or more employees and global turnover above €450 million.

What constitutes a credible transition plan under CSDDD? It must include a baseline emissions assessment, decarbonisation levers aligned with a 1.5°C pathway, specific CapEx and OpEx commitments by timeline, material Scope 3 analysis, and board governance mechanisms that ensure real accountability — not just sign-off.

UNEP FI and the EU Platform on Sustainable Finance have both published guiding frameworks. Neither is legally binding as a specific methodology, but both carry significant weight in regulatory and supervisory expectations.

The legal exposure is real. Member states must designate supervisory authorities empowered to investigate, order corrective measures, and impose fines. Boards that cannot demonstrate genuine transition plan governance face substantial personal liability risk. Early engagement with advisors experienced in both the regulatory and financial dimensions of transition planning is essential — the window to build a credible plan before 2027 is narrowing quickly.