The European Commission has put forward plans to extend the Carbon Border Adjustment Mechanism (CBAM) beyond primary industrial materials. The proposal would cover selected downstream products from 1 January 2028, including goods manufactured using substantial quantities of steel or aluminium. The final product list is still subject to negotiations, but the proposal is already affecting how companies assess component sourcing and emissions-related documentation.
Fabricated steel manufacturers producing bolts, springs, structural fittings and fabricated assemblies face a compliance issue linked to where embedded emissions are generated. A finished component can incorporate steel produced at one installation and then rolled or coated at another before further processing elsewhere. As a result, information gaps can arise between upstream production steps and the final production facility.
In practical terms, a fabrication company may hold accurate records of its own electricity and fuel consumption. However, it may not have reliable information about the upstream steelmaking route used to produce the input material. This difference affects how evidence for carbon-border reporting can be assembled compared with conventional material quality control.
Component sourcing and upstream emissions evidence
Suppliers may provide certificates focused on tensile strength, chemical composition and dimensional tolerances without specifying the emissions methodology used by the steel producer. If the proposed downstream extension takes effect, procurement processes may need to retain details on steel origin, material composition and input quantities in a format suitable for emissions calculations. Commercial invoicing records alone may not be sufficient to establish the carbon evidence chain required under CBAM.
Procurement decisions can also shift when multiple offers exist for the same steel grade. One supplier may offer a lower purchase price alongside limited emissions documentation, while another may provide reliable installation-level records. If a finished component later falls under CBAM, comparing bids only on invoice price could understate both commercial exposure and compliance risk for buyers.
Customs classification for fasteners and fabricated assemblies
Customs classification is expected to play a key role as product scope depends on tariff categories. Finished components may be assigned to eight-digit Combined Nomenclature (CN) codes that cover products made from different materials or serving different technical functions. The legal scope would depend on the tariff classifications included in adopted legislation and any applicable exclusions.
Manufacturers are therefore expected to review potentially affected product lines in advance rather than assume that every steel-intensive component is already covered by the proposed 2028 extension. The approach described involves selecting individual finished products and tracing metallic inputs through purchasing and production records. If origin and quantity of steel cannot be established, substantiating upstream emissions claims would be difficult.
Traceability steps before 2028
After mapping metallic inputs, companies can incorporate processing losses, subcontracted operations and final export classifications into their documentation workflow. The preparation exercise is described as more manageable when starting with products representing the highest sales volumes or commercial value instead of attempting to map an entire catalogue at once. These steps are intended to organise supply-chain evidence ahead of any final legal requirements.
The period before implementation is also linked to reviewing potentially relevant CN codes and improving purchase-order traceability. Companies may also identify suppliers that cannot provide reliable emissions information as part of their preparation activities. The same documentation improvements are described as relevant for quality assurance and procurement resilience regardless of which products ultimately enter the expanded mechanism.
Fragmented markets, contract flow-down and anti-circumvention
The design of an expanded CBAM would need to reflect how downstream manufacturing is structured across markets. Highly fragmented finished-goods sectors may not be administered in the same way as large integrated steelworks. Information-sharing standards, documented assumptions and default calculation methodologies are described as factors influencing whether the extension addresses carbon leakage without creating disproportionate administrative costs for smaller manufacturers during negotiations between EU institutions.
Western Balkan manufacturers are identified as facing particular exposure because European industrial buyers often source components from neighbouring non-EU countries with competitive production costs and flexible delivery arrangements. If coverage expands, suppliers in these markets may need to document material inputs and upstream production information with discipline comparable to technical product specifications used today. Manufacturers with integrated purchasing, inventory and production records could have an advantage over competitors with more fragmented information systems.
The regulatory expansion would also require contractual changes along the supply chain. European buyers may request identification of upstream metal suppliers, advance notification of changes in material sources, and contractual warranties concerning information used in emissions calculations. Fabricators may need corresponding obligations in agreements with steel mills, service centres and other material suppliers to avoid situations where smaller manufacturers must guarantee emissions information they cannot independently access or verify.
The Commission’s anti-circumvention aim is described as preventing emissions-intensive production from escaping carbon-border obligations when processing activities move outside the EU. At the same time, downstream manufacturing involving value addition, technical processing and product differentiation would need differentiation from arrangements involving relabelling or limited transformations intended to avoid CBAM obligations.