The Carbon Border Adjustment Mechanism (CBAM) distinguishes between two geographic concepts that businesses can mistakenly treat as interchangeable: country of origin and country of production. Although they often coincide, they serve different purposes. Country of origin determines the applicable customs treatment, while country of production identifies where the last physical processing of the CBAM good took place and can affect the relevant installation data or default electricity factor used for emissions reporting.
The European Commission’s CBAM Q&A explains that country of origin follows the EU’s non-preferential rules of origin under the Union Customs Code. Country of production is the country where the last physical processing of the CBAM good occurred, excluding packaging. The producing installation is the entity capable of determining the good’s specific embedded emissions, while production country can also be relevant to default electricity factors.
Why the Distinction Matters for Metal Supply Chains
Complex steel and aluminium supply chains illustrate the practical importance of the distinction. Steel may be produced in one country, rolled or further processed in another, and sold by a trader established in a third. Neither the invoice country nor the seller’s address establishes the country of origin or the country of production.
An incorrect assumption can lead an importer to request emissions data from the wrong operator, identify the wrong installation or apply an inappropriate default factor. These errors can affect the evidence supporting a CBAM declaration even when the commercial documentation appears complete.
Businesses should therefore record the two concepts separately. The compliance file should include evidence of customs origin, physical production records, supplier declarations and installation identity as distinct data fields.
Contracts should also require suppliers to notify buyers when a change in physical processing affects the production country or potentially changes non-preferential origin. Procurement systems should not infer either field from a vendor’s registered address or the location from which goods are dispatched.
Customs and Carbon Reporting Must Be Coordinated
Country of origin and country of production are only part of the information needed to establish the correct CBAM treatment. The CN code, inward-processing status and authorised-declarant identity can also affect the outcome before embedded emissions are calculated.
Customs and monitoring, reporting and verification (MRV) controls should therefore be designed together. A company that develops emissions calculations without customs input risks producing technically accurate figures for goods that have been incorrectly classified or treated at the border.
Joint review by customs specialists, procurement, MRV and finance teams is a core compliance control. The objective is to ensure that the customs treatment, installation data and emissions calculation all refer to the same goods and reporting circumstances.
The distinction also matters when assessing suppliers. A trader may offer efficient logistics from a hub close to the EU, but the emissions associated with the goods can still depend on a production installation located much further upstream. Buyers need installation-level transparency to avoid confusing a convenient trading location with the source of the product’s embedded emissions.
Implications for Western Balkan Trade
The Western Balkans serve as production locations as well as transit and processing hubs for metals supplied to the EU. Companies undertaking genuine transformation need to understand whether the processing changes non-preferential origin, the CBAM country of production, both or neither.
These outcomes should be assessed under the applicable rules rather than assumed from the commercial description of a transaction. The fact that goods pass through a country or are sold by a company established there does not, by itself, establish where the last physical processing occurred or determine customs origin.
For importers, supplier onboarding should include two mandatory fields: legal country of origin and CBAM country of production and installation. Each should be independently supported by appropriate evidence. Where the two countries differ, exporters should explain the production and trading sequence rather than leaving buyers to infer the answer.
Building a Defensible Compliance File
The distinction between origin and production is a current compliance issue, not merely a voluntary carbon-accounting choice. Importers need emissions figures that can be supported in their CBAM declarations, while suppliers must maintain records that buyers and accredited verifiers can trace back to the relevant installation and reporting period.
Where commercial product-footprint calculations use a broader methodology than CBAM, the two should be documented separately. Businesses should not force a general product-footprint approach into the CBAM calculation where the legal methodology requires a different treatment.
A robust compliance file should connect customs evidence, production records, supplier information and emissions calculations. It should identify the applicable legal treatment, responsible data owner, implementation deadline and approval process for key assumptions. It should also specify what alternative approach will be used if the preferred treatment cannot be substantiated.
These controls should be integrated with purchasing, production, customs and finance systems so that changes in suppliers, processing locations or trading routes can be reflected without rebuilding the entire calculation. Regular reviews can help identify inconsistencies before a declaration is finalised or a claim is challenged by a customs authority, verifier or authorised declarant.
Two Geographic Concepts, Two Different Functions
CBAM uses country of origin and country of production for different purposes. The former follows the applicable customs rules; the latter identifies the location of the last physical processing relevant to the CBAM good and can inform emissions reporting.
Treating the two as interchangeable creates an avoidable compliance risk. Importers and exporters should maintain separate, evidence-based records for both concepts and ensure that customs treatment, installation identity and emissions calculations remain consistent throughout the supply chain.
