The European Union’s Carbon Border Adjustment Mechanism (CBAM) could extend further into industrial manufacturing from 1 January 2028, adding additional steel- and aluminium-intensive products to the proposed scope. The European Commission has proposed including 180 downstream product groups. The European Parliament adopted its negotiating position in September 2026, while the final legislative text remains under negotiation.
The proposed expansion targets the risk that carbon-related production costs may be avoided when steel and aluminium are incorporated into finished goods outside the EU. It also reflects a scenario where, if only basic materials are covered, carbon-intensive production could shift further along the manufacturing chain. In that case, European manufacturers could face higher input costs while competing against imported finished products.
The development would move CBAM beyond its initial focus on basic materials and into industrial supply chains. It would affect procurement, product costing, customs procedures and corporate financing. The existing CBAM framework is described as distinct from the proposed downstream measures, which have not yet reached a final legislative agreement.
Downstream supply chains and embedded carbon exposure
Steel and aluminium are described as passing through multiple production stages before reaching finished industrial goods. Fabricated metal products, machinery, household appliances, components and transport equipment are among the manufactured goods that can reflect the carbon costs and emissions characteristics of intermediate materials.
This exposure is expected to extend to downstream businesses even when their finished products are not directly listed under the mechanism. Carbon-related costs and documentation requirements can move through suppliers and components. As a result, companies beyond sectors directly covered by CBAM may still be affected.
European manufacturers could face carbon-related input expenses while competing with imported finished goods whose upstream steel or aluminium has not been subject to an equivalent adjustment. The difference can influence product pricing and manufacturers’ ability to compete in their markets. Companies able to demonstrate lower embedded emissions may be positioned to protect margins or market share.
Suppliers that cannot provide reliable emissions information may face more conservative assessments by EU customers. The source material links this risk to how emissions data availability can shape customer evaluations. It also places documentation expectations within the broader downstream cost pressures described for industrial buyers.
Preparing for 2028: classification, bills of materials and assurance files
Preparation for a proposed 2028 start date involves mapping Combined Nomenclature (CN) codes. It also includes bills of materials, steel and aluminium content, supplier emissions data and contractual rights to obtain information. These records are intended to show how relevant materials contribute to the finished product for regulatory transactions.
The source material describes internal governance needs that connect customs, procurement, production, finance and assurance functions. Without coordination, the same product may be represented differently across company systems. That can create inconsistencies between material records, customs classifications and emissions documentation.
The supporting assurance file is described as needing product classification, material content and the supplying production installation. It should also include verified emissions associated with inputs, transformation losses and controlled allocation of emissions to finished goods. Maintaining these records continuously is described as important because independent verifiers or EU customers may request them later.
Waiting until a verification request arrives could require companies to reconstruct material flows and emissions allocations across multiple production stages. The preparation process is therefore presented as spanning more than one compliance moment. It also ties recordkeeping requirements to assurance readiness for regulated transactions.
Financing implications through CBAM-EU ETS interaction
Investors and lenders are described as needing to assess both potential direct CBAM liabilities and indirect exposure to carbon-related material-price increases. Either channel can put pressure on margins depending on how costs move through supplier agreements. It also depends on whether manufacturers can recover those costs from customers.
The assessment is described as extending into the 2030s, as the relationship between CBAM and the EU Emissions Trading System (EU ETS) changes over time. These developments can affect the economics of industrial assets designed for longer investment horizons.
The border mechanism is described as being phased in alongside a reduction of corresponding EU ETS free allocation towards 2034. For primary metals, the commercial difference between efficient production routes and carbon-intensive routes is expected to widen over time rather than remain at its 2026 level.
Downstream manufacturers are therefore described as needing sourcing and investment assessments over several years rather than limiting analysis to a single compliance period. The evolution of carbon costs is presented as affecting supplier economics and competitiveness for products incorporating steel and aluminium.
Contract terms for upstream data delivery and cost pass-through
The source material says commercial agreements should address risks when emissions data and carbon costs originate several stages upstream from the company responsible for the final transaction. Purchase and sales contracts are described as needing clear requirements for data delivery, verification status and supplier changes. They should also cover carbon-cost pass-through and remedies if evidence arrives late or cannot be used.
The provisions are described as particularly relevant where European manufacturers face additional costs for steel or aluminium inputs but compete against imported finished goods without an equivalent upstream carbon adjustment. If responsibilities are not clearly allocated, the company carrying the legal CBAM obligation may have limited means of recovering costs generated elsewhere in the supply chain.
The proposed downstream expansion is described as bringing carbon-related requirements closer to finished-product manufacturing. It would connect CBAM preparation with factory operations, enterprise resource planning (ERP) systems, purchase orders and product-cost calculations.
For companies across affected supply chains, capabilities are described as including reducing physical emissions and maintaining evidence usable in regulated transactions. The source material links these elements to industrial sourcing, cost management and commercial relationships under the proposed extension.