The European Union’s Carbon Border Adjustment Mechanism, or CBAM, is an environmental policy instrument that accounts for the embedded carbon emissions of certain imported goods. Its purpose is to address carbon leakage by reducing the difference between EU producers that bear a carbon cost and producers in third countries that may face a lower carbon cost. The European Commission describes CBAM as a tool that complements the EU Emissions Trading System [1].
CBAM operated in a transitional phase from 2023 to 2025, while the definitive regime started on 1 January 2026 [1]. Under the definitive regime, importers face obligations related to authorisation, reporting, and the purchase and surrender of CBAM certificates corresponding to the embedded emissions of imported goods. CBAM therefore affects not only customs teams but also procurement, production, sustainability, finance, and data-management functions.
The initial scope focuses on selected goods in carbon-intensive sectors, including cement, iron and steel, aluminium, fertilisers, electricity, and hydrogen [1]. Scope cannot be determined by sector name alone. Product classification, origin, import scenario, and the methodology used to calculate emissions must be considered together. Incorrect classification or weak supplier data can undermine both reporting accuracy and cost forecasting.
From a corporate perspective, the most effective approach is to treat CBAM as an ongoing control process connecting product, supplier, emissions, and customs data. Companies should build a scope inventory, assign ownership, collect measurable supplier data, and retain auditable evidence. CBAM is therefore more than a reporting obligation: it is a strategic signal supporting lower-carbon production and more transparent value chains.