European importers face a problem that is as operational as it is regulatory: the carbon data required under the EU’s Carbon Border Adjustment Mechanism often originates several companies and many production steps away from the customs declaration.
Clarion.Engineer, an engineering and environmental consultancy, has developed a methodology intended to close that gap by turning CBAM compliance into a continuous factory-level process rather than an annual emissions calculation.
The framework links EU importers and authorised CBAM declarants with non-EU manufacturers, exporters, precursor suppliers, energy providers and emissions-verification specialists. It sets out the activities, responsibilities, controls and evidence expected from each party, from the purchase of raw materials to the delivery of verified embedded-emissions data to the European customer.
CBAM entered its definitive phase in January 2026, placing greater emphasis on the quality of emissions information attached to imported goods. For producers outside the EU, the commercial implications extend beyond regulatory reporting. European buyers increasingly want to know whether their suppliers can produce consistent, traceable and verifiable data before agreeing volumes, prices or long-term contracts.
“The central challenge is not the final calculation,” a Clarion spokesperson said. “It is the chain of evidence beneath it: production records, energy consumption, precursor emissions, allocation methods, meters, laboratory results and the connection between factory output and goods delivered to the EU.”
Clarion’s methodology addresses this through an integrated Monitoring, Reporting and Verification cycle, or MRV. It begins with product classification and the definition of production boundaries, before mapping emission sources, production routes, precursor inputs and electricity consumption.
The process then assigns data owners, reporting frequencies and control responsibilities across factory departments. Production, procurement, finance, environmental management, laboratories, energy teams and IT functions are expected to contribute to the same controlled reporting system.
This is a marked change for businesses that have previously treated carbon reporting as the responsibility of a single environmental manager or an external consultant.
Under the Clarion model, operational data are periodically reconciled with procurement records, energy invoices, inventories, production accounts, sales documents and export quantities. Anomalies are investigated during the reporting year rather than reconstructed after it has ended.
The framework also gives particular attention to precursors—materials used to produce another CBAM good whose embedded emissions may have to be carried into the final product.
A manufacturer using purchased steel, aluminium, fertiliser inputs or other relevant materials can depend on data originating at a separate installation, potentially in another country and under a different reporting system. A weakness at this stage may affect the emissions value of the finished product.
Clarion’s procedure requires factories to identify precursor suppliers, production locations, quantities, production routes, reporting periods and the verification status of the data received. Supplier questionnaires, supporting-document requirements, risk classifications and escalation procedures are used to distinguish reliable information from estimates or unsupported declarations.
Where supplier data are incomplete, the methodology records the resulting limitation and determines whether actual information can be used or whether an applicable default approach is required. It also introduces change controls for new suppliers, altered production routes and changes in the origin or specification of precursor materials.
Electricity data create a separate set of risks. Industrial consumers may receive renewable-energy declarations, contractual certificates or environmental marketing claims from their power suppliers, but these do not automatically establish the emissions value permitted under CBAM.
Clarion’s framework therefore separates commercial energy claims from evidence that is relevant under the applicable calculation rules. Consumption data must be reconciled with meters and invoices, while generation-source information, emission factors and contractual arrangements are subjected to defined eligibility and traceability checks.
At the centre of the methodology is the role of the “Pre‑Verifier”—a term used by Clarion to describe a readiness and internal-assurance specialist rather than a statutory verifier.
A Pre‑Verifier engaged by a factory may review the monitoring plan, test calculations, examine precursor information, assess controls, perform sample checks and identify deficiencies before formal verification begins. The aim is to reduce late-stage corrections and produce a structured evidence package for the accredited verifier.
The distinction is important. Pre‑Verification does not amount to a CBAM certificate, accreditation or formal verification opinion. Where the regulatory framework requires actual embedded-emissions data to be verified, the conclusion remains the responsibility of an appropriately accredited verifier.
Clarion’s methodology also covers a second operating model in which a local technical specialist carries out defined work under the direction of an EU-accredited verifier. This may involve site visits, process observation, interviews, technical testing and the collection of evidence at a non-EU installation.
In that arrangement, the accredited verifier retains control of the verification strategy, risk assessment, materiality, sampling, evaluation of findings, independent review and final conclusion.
The framework requires a strict independence barrier between the two roles. A consultant who prepares a factory’s system should not then present work on the same installation and reporting period as independent verification. Competence, confidentiality, delegated authority and conflicts of interest must be documented.
This division reflects a broader concern in the assurance market. As demand for CBAM services grows, manufacturers may struggle to distinguish advisory support from the legally significant work of an accredited verifier.
Clarion has tried to make the boundary explicit through separate responsibility matrices, engagement models and reporting lines.
Its method statement contains work-breakdown structures, RACI matrices, data registers, meter inventories, precursor logs, risk-and-control matrices, corrective-action records and verifier request trackers. It also proposes a structured digital “data room” through which approved evidence can be transferred to the verifier and, where appropriate, the EU customer.
The methodology allows factories to develop their MRV systems in stages. These start with a scope and gap assessment, followed by system design, data-control implementation, pilot calculations, internal Pre‑Verification and corrective action. The final stages cover accredited-verifier readiness and routine monthly and annual operation.
For importers, the attraction is greater visibility over carbon exposure before the reporting deadline. Buyers may seek contractual rights to obtain data, question calculations, request supporting evidence and receive early notification of changes that could affect embedded emissions.
They may also impose reporting timetables, verification requirements and remedies for incomplete or late information. Suppliers unable to meet these expectations could face the use of less favourable default values, delayed orders or pressure to renegotiate commercial terms.
The effectiveness of any such framework will nevertheless depend on the quality of the underlying factory records and the willingness of upstream suppliers to provide credible information. A detailed procedure cannot compensate for missing meters, inconsistent production data or an uncooperative precursor supplier.
Nor does the methodology transfer legal responsibility away from the authorised CBAM declarant, factory operator or accredited verifier.
Clarion argues that its value lies instead in connecting those responsibilities before the formal reporting and verification process begins.
For industrial exporters, CBAM is increasingly becoming a question of market access and customer confidence, not simply environmental compliance. The businesses best placed to respond may be those that treat emissions information with the same discipline as production quality, financial reporting and customs documentation.
That is the operating model Clarion is seeking to establish.