European manufacturers and overseas suppliers are preparing for potential carbon border adjustment changes as the European Union negotiates an extension of CBAM to steel and aluminium components, machinery and other manufactured goods. The proposed scope is expected to influence procurement contracts, supplier selection and factory investment decisions ahead of the planned start date.
As of 12 October 2026, the downstream expansion remains a legislative proposal. The European Commission has proposed extending CBAM to additional downstream products from 1 January 2028. The Council of the EU adopted its negotiating position in June, followed by the European Parliament in September. The institutions are now tasked with negotiating the final product list and detailed provisions.
Commission proposal and evolving product scope
The Commission’s original package identified 180 additional product categories. These categories were described as having an average steel and aluminium content of 79%. The selected imports were estimated at about 15% of the volume of goods already covered by CBAM, while accounting for 53% of their import value.
These figures were presented as indicating a shift toward higher-value manufacturing rather than only adding more volume of basic metals. During the legislative process, the potential scope widened. An October notice from the Office of the United States Trade Representative (USTR) described the Council’s position as adding more than 300 products and the Parliament’s position as adding approximately 400 products.
The USTR notice figures were described as reflecting competing negotiating positions rather than a final list of products subject to CBAM. As negotiations continue, the eventual product perimeter could differ from the Commission’s initial proposal. The final scope will depend on outcomes across the EU institutions’ discussions.
Competitive effects for finished goods and component suppliers
The proposed changes are linked to a potential competitive imbalance between European manufacturers and overseas producers of finished goods. EU companies using steel and aluminium that are already subject to European carbon costs can face competition from imported finished products. In those cases, metal inputs could attract CBAM obligations if imported separately.
The downstream extension is intended to reduce incentives to relocate additional processing outside the EU solely to avoid carbon-related costs on covered metal inputs. For component suppliers, the proposal could affect purchasing decisions and how customers compare production locations. A lower factory-gate price may be offset by a higher assessed carbon liability or by costs associated with rebuilding emissions evidence used for product calculations.
European buyers may seek longer-term supply agreements with manufacturers able to identify metal sources, trace relevant precursor materials and provide reliable emissions data. Suppliers without adequate records could face greater uncertainty when customers compare offers or negotiate contract terms. This is tied to how emissions information may be used during commercial discussions.
Compliance planning before implementation in 2028
Manufacturers assessing capital expenditure are expected to distinguish between existing CBAM obligations and potential exposure under the proposed downstream expansion. A company producing goods outside the current scope would face a different immediate compliance position than a firm already exporting covered products such as certain metal structures or fasteners.
Companies are not expected to assume that any final downstream product list will match the Commission’s original proposal. The legal perimeter will be determined through negotiations between EU institutions. Even so, the proposed 2028 implementation date creates commercial implications before any additional statutory charge takes effect.
Procurement contracts negotiated now may extend beyond 2028. Qualifying new suppliers, establishing traceability procedures and building reliable emissions-data systems can require substantial preparation time. Manufacturers therefore need to identify which products could enter the expanded scope, quantify relevant steel and aluminium content, and confirm whether suppliers can provide supporting evidence for those inputs.
Contract terms for emissions documentation and cost allocation
While negotiations will determine the legal perimeter of the expanded mechanism, companies entering multi-year supply agreements face a practical question about responsibility for additional costs if their products become covered. Contracts can address responsibility for emissions documentation, supplier cooperation, data corrections and allocation of future CBAM-related costs.
For component manufacturers, demonstrating the origin and emissions characteristics of metal inputs could become part of supplier qualification requirements. Although the expansion is not yet law as of 12 October 2026, its potential reach is already influencing how companies evaluate procurement choices, investment plans and long-term pricing risks.