BRUSSELS, 5 NOVEMBER 2026 — The European Union’s Carbon Border Adjustment Mechanism (CBAM) is set to expand in a way that brings aluminium-intensive finished products into carbon-border coverage discussions. The European Commission has proposed a broader set of downstream goods for inclusion from 2028, while the Council and European Parliament have developed their positions during 2026. Negotiations on the final product list are still ongoing, but manufacturers of extrusions, fittings, components and industrial assemblies are increasingly likely to receive requests from European customers for emissions information linked to aluminium inputs.
Component producers typically do not operate like primary aluminium smelters, with production often spread across multiple processing stages. Activities can include extrusion, rolling, casting, machining, coating and assembly, using metal sourced from different mills and recycling operations. While individual factories can measure their own energy consumption, tracing the production history of purchased aluminium can be more difficult. If additional downstream goods enter the CBAM framework, connecting finished components to their material inputs may become part of an importer’s emissions calculation.
Commission proposal for downstream coverage from 2028
The proposed extension is intended partly to address a potential competitive imbalance in carbon-border treatment. Imported carbon-intensive metal may already face a carbon adjustment, while finished products manufactured abroad using the same material can remain outside the mechanism. This difference could encourage investment to shift from EU fabrication facilities to competitors in countries without equivalent requirements. Extending CBAM to selected finished goods with substantial metal content is intended to reduce incentives to relocate emissions further along the value chain.
Broader coverage would also create additional administrative requirements for manufacturers and importers. As product scope expands beyond primary metal production, companies may need to provide more structured information tied to how products are made. The final shape of these obligations depends on which downstream categories are ultimately included in the mechanism.
Bills of materials and CN codes for emissions calculations
Bills of materials are becoming central to carbon-data management as companies prepare for potential reporting needs. A single production order may include multiple aluminium grades alongside steel fasteners, surface-treatment chemicals and packaging materials. Manufacturers first need to determine whether their finished products fall within the CN codes that are ultimately included in CBAM coverage. The applicable calculation methodology would then define how emissions associated with relevant inputs must be accounted for.
Compliance approaches based on assumptions about input coverage are not considered reliable. Using a blanket assumption that every material automatically attracts a CBAM charge does not provide a dependable basis for compliance, and assuming that none of the inputs matter is also not sufficient. Instead, the calculation needs to reflect which inputs are relevant under the applicable rules.
Data flows across processing stages and upstream supply chains
The implications extend beyond primary metal producers into downstream fabrication and importing roles. An extrusion manufacturer may buy aluminium billets, an automotive supplier may source machined components, and a construction contractor may import finished fittings. Each business sits at a different point in the upstream supply chain and has access to different levels of production information. Data-management systems would need to allow relevant information to move with materials through successive processing stages.
The objective is to avoid requiring each downstream supplier to reconstruct emissions figures that can only be substantiated by the original producer. In practice, this depends on how documentation is maintained across processing steps such as machining and coating before assembly into final industrial assemblies.
Rules needed to prevent duplicate counting of covered inputs
Preventing duplicate counting is identified as an important condition for any workable extension. Aluminium may enter the EU as a covered raw material, then undergo fabrication and later be traded as part of a downstream product. The final legal framework would need to clarify how prior treatment of an input affects the calculation for the finished good. Companies are expected not to rely on offsetting arrangements they develop themselves or on assumptions that an emissions obligation disappears because material was previously imported.
The applicable rules must specify how these scenarios are treated within CBAM calculations for downstream products that incorporate previously covered inputs.
Supplier documentation and preparation in Serbia and neighbouring centres
For suppliers responding to procurement requirements, a key commercial advantage is the ability to provide dependable information. Manufacturers that maintain consistent bills of materials, material-origin records, production-batch documentation and appropriately substantiated emissions data may be better positioned when responding to customer requests. Investment in these controls is expected to align with customers’ actual demands and with the likelihood that specific products will fall within the final scope rather than being applied indiscriminately across all product lines.
Manufacturers in Serbia and other neighbouring production centres have an opportunity during the preparation period to strengthen systems serving European construction, automotive and engineering industries. Companies can map aluminium inputs, improve supplier declarations, link purchase orders with production batches, and identify gaps in information received from upstream producers. These measures can also support product quality management and origin traceability, including for goods that may ultimately remain outside expanded CBAM coverage.
Contract uncertainty around 2028 calculations
Commercial contracts are expected to reflect uncertainty surrounding proposed changes in CBAM scope. Buyers can request documentation, information about material origins and notification of changes in suppliers as part of procurement processes. However, requiring suppliers to apply a definitive 2028 carbon calculation before disputed provisions have been adopted could create contractual risks. Suppliers are also advised against treating potential certificate costs as existing legal liabilities.
Scenario-based clauses and contract provisions allowing review once final rules are published are described as a more practical approach during the transition period.
Customs classifications and data exchange between smelters and importers
Companies able to demonstrate both origin and emissions characteristics of processed aluminium may be better prepared for future procurement requirements under expanded coverage. Fabricators sourcing verified lower-emission inputs while maintaining detailed batch records and cooperating with credible upstream producers may strengthen their position in competitive tenders. The commercial value of these measures depends on factors including final legislative scope, technical characteristics of individual products and overall delivered cost.
Implementation for European manufacturers depends on clear customs classifications, workable calculation methodologies and reliable data exchange between smelters, processors and importers. Until these elements are settled, preparing supply-chain records is described as commercially prudent based on available information. Definitive statements about which aluminium components will face CBAM charges remain premature as negotiations continue over product scope.