As the Carbon Border Adjustment Mechanism (CBAM) enters its first definitive year, EU industrial importers must assemble fragmented supplier records into auditable evidence of embedded emissions. The first annual declaration, covering imports made in 2026, is due by 30 September 2027.
CBAM requires an authorised CBAM declarant to identify imported goods and account for their embedded emissions. The European Commission guidance for the definitive period distinguishes reporting based on default values from claims using actual, verified emissions.
Records needed to support a declaration may sit with different parties: production data at a non-EU factory, logistics data with a customs agent and purchasing records at a European customer. The gaps pose an operational challenge for businesses trading metals, cement, fertilisers and electricity.
Linking shipments to production data
A shipment of aluminium may be documented by customs code, weight and value, while the production facility holds electricity-use records, process data and details of precursor materials. Steel buyers may receive material from different mills under one purchase order, making it necessary to identify which producer and installation supplied each lot.
For electricity, the evidence chain can depend on producer contracts, metered output, hourly nomination and transmission conditions. If identification is missing at any stage, an importer may be unable to reconcile the goods physically delivered with the emissions value declared.
Actual emissions values may be useful where a supplier’s process is cleaner than the applicable default, but importers need suitable records and independent verification where required. A general company carbon footprint does not substitute for the product and installation data prescribed by the regulation.
Records for declarations and commercial decisions
A proposed starting point is one controlled record for each relevant import lot or electricity allocation. It would capture the CN8 code, producer and installation, along with quantity, production period, intermediary parties, assigned emissions data, validation status and ultimate cost allocation.
Companies should separate information needed by the authorised CBAM declarant from optional ESG data requested by downstream customers. Procurement teams have reason to set carbon-data obligations in supply agreements before the annual declaration deadline.
Reliable traceability can support CBAM certificate forecasts and help processors explain material-price surcharges. It can also help banks distinguish documented liabilities from broad estimates and enable industrial buyers to compare suppliers on a consistent basis. Companies that build an emissions-evidence architecture now may reduce disputes later.