European manufacturers are reviewing procurement strategies and production investment plans as proposed changes to the Carbon Border Adjustment Mechanism (CBAM) could extend carbon-cost requirements to additional steel- and aluminium-intensive goods. The potential expansion would affect questions about the relative cost of materials sourced domestically, imported components, and production located outside the European Union.
The legislative process is still underway. On 15 September 2026, the European Parliament adopted amendments and referred the file for interinstitutional negotiations after the Council agreed on its position in June 2026. The negotiating positions do not indicate that all downstream products proposed for coverage are already included.
Legislators refine downstream product scope
The European Commission’s original proposal listed 180 downstream products. It focused on goods containing significant amounts of steel and aluminium that could be exposed to carbon leakage. Legislative institutions have proposed changes to the scope, requiring manufacturers to track the final product list, customs classifications, and application dates.
Manufacturers distinguish between proposed and applicable requirements for procurement planning. Carbon costs on basic metals can influence buyer incentives to source finished goods containing those materials from outside the EU. Extending CBAM coverage to selected downstream products could change those incentives while extending emissions-data requirements deeper into industrial supply chains.
Companies also separate current compliance exposure from potential future obligations. Purchasing steel already covered by CBAM can affect procurement costs under the existing framework. Importing a finished component that appears only in a proposed product list does not create an existing certificate obligation for that finished product solely because it contains steel or aluminium.
Investment models face scenarios before final rules
The possible expansion is relevant for manufacturers deciding whether to invest in European assembly capacity or continue importing components. Firms assessing a new production line may compare locally sourced components with finished or semi-finished goods purchased abroad. If downstream imports become subject to additional carbon costs, the economics of these options could shift.
Until legislation is finalised, investment models need to differentiate between applicable rules and alternative scenarios under negotiation. Companies are advised not to treat the proposed expansion as an immediate charge across all products that could eventually fall within scope.
An illustrative contract using 10,000 tonnes of relevant steel annually shows potential financial exposure. Under a scenario where future applicable CBAM treatment adds €40 per tonne, the gross annual amount would reach €400,000 before other adjustments.
The €40-per-tonne figure is a scenario assumption rather than a current statutory rate or a forecast of the final methodology for downstream goods. The actual impact would depend on the final scope and on rules applicable to each product.
Commercial terms determine who bears added costs
Any future cost allocation depends partly on manufacturers’ commercial agreements. A producer selling components under a long-term fixed-price contract may need to absorb additional regulatory expense if price adjustments are not permitted under the agreement.
Where contracts allow changes tied to regulation, some or all of the cost may be passed on to customers. Large buyers may also seek supplier absorption of part of the increase as a condition for maintaining orders.
These arrangements can affect supplier margins even when manufacturing processes and physical products remain unchanged. The outcome depends on contract terms, whether parties can renegotiate prices, and how costs are treated under the final legislation.
Emissions data needs expand with more complex supply chains
If CBAM extends to finished components, manufacturers would need emissions information across more complex production chains. A component supplier may buy multiple grades of steel or aluminium from different installations, while an EU customer imports a finished assembly incorporating those materials.
The emissions information must follow the methodology applicable to the final covered good and its inputs. A supplier’s corporate sustainability report may not provide enough product-specific detail to generate required figures.
For exporters in Serbia, Türkiye and other manufacturing locations serving EU customers, preparations can support commercial negotiations before any expansion takes effect. Product classification, bills of materials, and precursor traceability can help identify potentially affected goods and respond to customer information requests under existing contracts.
The quality of this information matters for both future compliance planning and current supplier relationships. Manufacturers unable to trace materials used in individual products may find it harder to assess potential exposure or substantiate information requested by European buyers.
Sourcing exposure and inventory timing influence valuations
Equity investors also consider sourcing arrangements alongside production locations. Businesses importing large volumes of components that could become covered under an expanded CBAM framework may face different exposure than companies purchasing metal domestically.
Inventory accumulated before a regulatory change could create temporary commercial advantages or valuation risks depending on when rules apply and when goods are sold. Timing of purchases, applicable product classification, and eventual treatment of existing stock would influence outcomes.
The final scope will determine how costs are distributed among European processors and manufacturers dependent on imported components. Broader coverage could strengthen some EU-based processors’ competitive position while increasing costs for other businesses relying on foreign-sourced parts.
As negotiations continue, manufacturers are expected to keep current liabilities separate from possible future costs when evaluating sourcing options, contractual exposure, and capital expenditure. The proposed expansion should not be priced into every potentially affected product as if an additional charge were already in force.