The European Union’s proposed expansion of the Carbon Border Adjustment Mechanism (CBAM) would extend the border-carbon framework to a wider set of steel- and aluminium-intensive manufactured goods. The Commission proposal sets an intended start date of 1 January 2028. Fasteners, wire products, springs and related fabricated-metal goods are among the categories highlighted in downstream expansion discussions.
For manufacturers, distributors and EU importers, the changes could move CBAM compliance from a focus on upstream steel suppliers to a direct concern for downstream businesses. This includes small and medium-sized enterprises (SMEs). The final product scope, however, remains under negotiation, and it must be separated from the rules currently governing imports.
Negotiations shape which downstream goods could be covered
The European Commission has proposed extending CBAM to a defined group of downstream goods that contain significant amounts of steel and aluminium. The extension is intended to begin on 1 January 2028. The Council and European Parliament have adopted broader negotiating positions, with Parliament backing a substantially larger list of downstream products.
The final scope has not been agreed. Individual Combined Nomenclature (CN) codes should therefore not be treated as definitively covered until amending legislation is adopted. Companies are also expected to distinguish between the existing legal framework for 2026 imports and potential requirements under the proposed reform.
The Commission proposal and the Council and Parliament positions can be used for scenario analysis and future contract drafting. They should not be applied to current declarations as though the proposed extension were already in force. A two-scenario planning model is presented as a way to prepare for both the existing rules and a potential expansion.
Under this approach, businesses can build data-collection systems and optional contractual provisions without basing present compliance decisions on legislation that remains under negotiation. This planning is aimed at supporting readiness for either outcome rather than treating proposed categories as already covered.
Downstream compliance relies on precursor traceability
If additional manufactured products enter CBAM under the proposed expansion, fastener, wire and spring producers would need to link their steel inputs to the finished goods they export. Bills of materials, production yields and manufacturing records are cited as tools to connect precursor consumption with the finished product’s CN classification.
Suppliers would need to provide emissions information required for covered precursors. Where materials from multiple sources are combined, manufacturers would need a defensible method for averaging or segregating emissions data that aligns with the final applicable rules.
The compliance requirements for downstream manufacturers differ from those faced by steel mills. A fastener or spring producer may have relatively modest direct emissions while embedded carbon in the product originates largely in steel rod, wire or other incoming materials.
As a result, supplier emissions data, material traceability and accurate product classification could become more important than maintaining a detailed inventory of combustion sources within the downstream factory.
Verified precursor data may affect sourcing and cost calculations
An extension of CBAM to downstream goods could influence sourcing decisions across European industrial supply chains. EU buyers may prefer suppliers that provide verified precursor emissions data and more predictable information about potential CBAM costs.
Manufacturers relying on inputs with limited emissions documentation could face disadvantages if applicable default values produce less favourable results. These differences may be especially relevant for high-volume, low-margin products such as fasteners, where changes in embedded emissions can affect commercial calculations.
The distinction between verified actual emissions and default values also has financial implications under the definitive regime. Default-value mark-ups increase through the phase, while reliable actual data can reflect cleaner feedstock or production characteristics.
Suppliers able to quantify resulting cost differences in euros may be better positioned for pricing discussions and long-term supply agreements than businesses relying on general low-carbon claims. Until final legislation and calculation rules are set, companies are advised to treat potential cost differences as scenarios rather than confirmed liabilities.
Western Balkans manufacturers may need longer lead times
Serbia, Bosnia and Herzegovina, and North Macedonia have metal-processing sectors supplying European automotive, construction and machinery customers. Manufacturers in these markets are expected to monitor the proposed 2028 extension because preparing supplier data, product classifications and production records may require substantial lead time.
Supplier governance is identified as part of monitoring, reporting and verification (MRV) processes. Purchase contracts should specify the producing installation, reporting period, emissions-data format, verification requirements and procedures for correcting information.
Changes at supplier sites—such as production-site updates, manufacturing-route adjustments or precursor substitutions—can alter emissions values associated with products. If such changes are not communicated before commercial terms are agreed, downstream manufacturers may face unexpected differences in their eventual CBAM exposure.
Contractual notification requirements are therefore described as a way to manage both compliance obligations and carbon-cost risks linked to supplier changes over time.
CN-code screening supports early preparation using existing records
Manufacturers are advised to screen export CN codes against product lists contained in the Commission proposal and the negotiating positions of the Council and Parliament. This screening can help identify products with a higher likelihood of inclusion and prioritise collection of precursor emissions data.
The stated objective is preparation for possible legislative changes without prematurely treating proposed product categories as covered goods under current law. Companies are also expected to integrate this preparation with existing purchasing, production, customs and finance records.
A decision file is described as connecting relevant CN codes, precursor information, production-process boundaries, material records and emissions information. It should also identify responsibility for approving assumptions and documenting fallback treatments where preferred data cannot be substantiated.
Using shared underlying records for operational management alongside compliance preparation is described as supporting adaptation when final product lists, calculation methodologies or other legal requirements are established. It is also presented as providing a basis for supplier negotiations and future cost assessments.