The European Commission’s proposal to extend the Carbon Border Adjustment Mechanism (CBAM) to 180 downstream goods remains unsettled, leaving importers to distinguish the binding product scope for 2026 declarations from goods that could be added later. The proposed expansion, made in December 2025, would primarily cover products intensive in steel and aluminium and take effect in January 2028.
The Council adopted its position on the proposal in June 2026, while the European Parliament voted on amendments in September and proposed a broader perimeter. Negotiations between the two institutions have not settled the precise annex listing products covered by the proposed extension.
That leaves importers with two separate tasks: apply the binding, code-by-code scope relevant to a 2026 declaration, and track proposed products that could influence future supplier contracts or investment decisions. The annex remains unsettled; proposed coverage should not be treated as a current certificate liability.
Customs codes determine the product boundary
CBAM obligations attach to goods identified under the applicable customs nomenclature and regulatory conditions, rather than automatically to every product used by a covered industry. A product’s eight-digit customs identity can determine its treatment more directly than the sector that buys or uses it.
Classification is based on the product’s objective characteristics and the tariff rules applied when it is imported into the EU, not solely on its material content or a manufacturer’s internal product category. The same metal may arrive as semi-finished stock, a machined component or part of a complex assembled product, each with a different possible customs classification.
A shipment of pipe fittings, a coated coil and a completed pump assembly may therefore require different carbon files even if all contain substantial steel. An item marketed as a machine spare might still be classified as a metal article, while a complete machine could fall under another tariff heading. Disputed classifications should be reviewed by an experienced customs professional rather than inferred from metal content.
EU buyers can connect purchase-order lines to CN classifications, supplier installation data, origin, volumes and responsibility for declarations. They should keep emissions data separate from origin documents, technical specifications and certificates of conformity, since those records establish different facts. A factory product carbon footprint may not follow the prescribed CBAM methodology and therefore may not be usable for a formal declaration.
Build controls around purchasing and supply changes
A classification-first review can start with a purchasing dataset containing a thousand active items. Items can be ranked by annual import value, likely metal content, customs uncertainty and the consequences of a price correction. Ambiguous components can be referred for binding or specialist customs classification, while goods clearly outside the current schedule can be monitored.
This approach is intended to avoid using scarce technical resources to calculate emissions for products that do not create a present declaration duty. A change to a part number, manufacturer or processing route should trigger a review of the goods code and evidence file in the purchasing system.
Finance teams can reconcile declared import volumes with required certificate purchases, while engineering checks whether material substitutions alter the underlying production route. Such controls matter for framework contracts where successive deliveries may come from different factories. Companies that integrate classification into engineering, procurement and customs work may identify potential future price changes earlier than those relying on sector-wide descriptions.
For goods already covered, buyers should estimate emissions under the applicable rules, apply the free-allocation adjustment and recognise eligible carbon prices paid abroad. For products on a proposed future list, they can model a shadow carbon cost, but should not record it as a current certificate liability.
Out-of-scope finished products may still face indirect effects from EU Emissions Trading System (EU ETS) costs borne by domestic suppliers for metal, heat and electricity. Combining costs for currently covered goods, proposed future coverage and indirect EU ETS effects can distort margin analysis and prompt unjustified supplier price demands.
Cross-border production adds a further classification question: a casting made in one country, machined in a second and imported from a third needs a defensible record of what crossed the EU border and how it was classified at that point. Trade diversion or superficial processing intended to evade a charge can raise anti-circumvention concerns, but legitimate transformation cannot automatically be treated as evasion; the factual production route matters.
The recommended first step is a customs-and-carbon register for the highest-value purchased products, rather than reliance on a generic supplier questionnaire about CBAM compliance. The next carbon-border dispute in Europe is likely to concern the identity of a specific imported part, not simply the industry that buys it.
