Steel processors exporting to the European Union face a growing commercial challenge in documenting the embedded emissions of purchased materials. Even when a factory operates efficiently, incomplete information about upstream steel production can prevent exporters from substantiating lower emissions for their finished goods.
For rolling mills, tube manufacturers and steel component producers, procurement decisions increasingly depend on the quality of emissions data accompanying each input. Material grade, purchase price and delivery schedules remain relevant, but the ability to support a product’s carbon calculation can also affect negotiations with EU customers.
The financial implications extend beyond the original steelmaker. Downstream processors may have limited influence over how their purchased metal was produced, yet the emissions information available from suppliers can affect the CBAM treatment of their exports. A lower-priced input does not necessarily deliver the strongest finished-product margin once material consumption, applicable adjustments and the allocation of commercial benefits are considered.
Precursor documentation determines the emissions calculation
Under the CBAM methodology, complex goods must account for the relevant embedded emissions of their precursors. Where actual emissions data are used for a precursor produced outside the installation in a non-exempt country, the calculation requires an appropriately accredited verification report covering the relevant reporting period. If the required report is unavailable, the applicable default values must be used for that precursor. A supplier spreadsheet prepared independently does not, on its own, satisfy this requirement. [2]
The definitive methodology treats indirect electricity emissions differently depending on the product and production stage. For iron and steel goods listed in Annex II, indirect electricity emissions at that production stage are excluded from the calculation. However, a precursor outside Annex II, including agglomerated ore, may carry applicable indirect emissions into the wider calculation chain. Product-specific assessment is therefore necessary before electricity-related entries are excluded from a procurement analysis. [3]
A supporting purchasing file should identify the producing installation, input product, relevant reporting period, quantity consumed and basis for the reported emissions value. Invoices establish part of the commercial history, while technical records help demonstrate whether the supplied material corresponds to the product represented in the emissions calculation.
Intermediaries introduce an additional documentation requirement. Distributors can provide credit, inventory availability and smaller deliveries, but processors need to establish whether those distributors can transmit the required producer information and obtain permission for its use. A distributor’s own sustainability statement does not establish the production data of an upstream installation.
Confidentiality arrangements can help address suppliers’ reluctance to disclose detailed operational records. Parties can establish controlled access for relevant reviewers, agree on a defined reporting package and specify how questions from verifiers will be handled. Contracts can make the delivery of usable emissions information an explicit commercial obligation.
Material consumption changes the cost of CBAM compliance
The quantity of steel purchased is not necessarily equal to the quantity of finished goods sold. Cutting losses, offcuts and rejected production can increase the input required for each saleable tonne. The European Commission’s steel guidance illustrates how precursor consumption and output quantities affect specific embedded emissions, including where certain downstream operations fall outside the relevant process boundary. [3]
Procurement teams therefore need to calculate supplier premiums against the quantity of finished product rather than the nominal price per input tonne. A premium that initially appears modest can become more significant when adjusted for the plant’s actual consumption ratio. Conversely, material that delivers better production yield can reduce both input requirements and the precursor emissions assigned to each tonne of saleable output.
A hypothetical calculation illustrates the commercial effect. Consider a processor exporting 20,000 tonnes annually and consuming 1.08 tonnes of purchased steel per tonne of finished product. If a supplier offering usable emissions documentation charges an additional EUR 12 per input tonne, the resulting premium amounts to EUR 12.96 per finished tonne, or EUR 259,200 annually.
Suppose a complete comparison subsequently establishes a difference of 0.30 CBAM certificates per finished tonne between the sourcing options, after accounting for the relevant free-allocation adjustment and any recognised carbon-price deduction. At an assumed certificate price of EUR 80, the difference would represent EUR 24 per finished tonne, equivalent to EUR 480,000 annually.
If additional preparation and verification support costs an assumed EUR 40,000, the amount remaining after the input premium and support expenditure would be EUR 180,800, or EUR 9.04 per finished tonne, for the processor and EU importer combined. These figures are illustrative commercial assumptions, not reported steel prices or production benchmarks.
The resulting benefit cannot automatically be attributed to the processor. An EU importer may retain part of the potential saving, while the precursor supplier has already captured its premium. The processor’s share will depend on the selling price and the terms agreed with its customer. Commercial contracts should therefore address the distribution of any benefit before the processor incorporates the full potential saving into its earnings expectations.
The certificate difference in this example cannot be established from emissions data alone. Steel’s free-allocation adjustment depends on the applicable methodology, including product characteristics, production route and relevant precursor contributions. Applying a single percentage to all embedded emissions can produce an inaccurate comparison between sourcing options. [4]
Mixed sourcing affects the attribution of emissions
Using multiple suppliers can improve procurement flexibility but complicate the calculation of embedded emissions. Under the methodology, precursor emissions are generally averaged for precursors with the same CN code across supplying installations. More specific attribution requires sufficient evidence that the relevant production process used material from the identified installation or subset of installations. Rules governing different production periods also affect averaging. [2]
Processors must therefore ensure that warehouse, purchasing and production records support the distinctions made in customer offers. Purchasing a quantity of lower-emission steel does not automatically establish that every EU-bound order can claim the emissions value associated with that material. Where inputs are pooled and records cannot substantiate narrower attribution, the commercial calculation must reflect the value that can actually be supported.
Physical segregation offers one possible approach, but it carries operational costs. Separate storage, additional handling, smaller production campaigns and reduced opportunities to substitute materials can erode the anticipated benefit of a particular supply source. These expenses need to be assessed alongside the input premium and emissions-reporting costs.
An alternative is to maintain a more consistent supply mix. This can simplify production planning and reduce the number of supplier evidence relationships requiring management, although it may increase dependence on an individual supplier. The appropriate approach depends on the reliability and scale of the expected commercial benefit, production scheduling constraints and the importance of maintaining alternative sources.
Verification requirements become part of supplier qualification
Supplier assessments can combine technical documentation and commercial risk in a single review. Buyers need to establish whether reported emissions relate to the installation producing the purchased material, whether the verified report will cover the relevant period and whether the information matches the product being supplied. Contracts should also specify responsibility for correcting errors and allocating costs if a customer quotation has already relied on incorrect information.
These requirements are particularly relevant when long-term supply agreements are renewed. Buyers can negotiate reporting obligations while allocating future volumes, rather than attempting to resolve documentation gaps after the material has entered production. An agreed timetable for emissions information can become a contractual service obligation alongside delivery performance and quality documentation.
A temporary documentation delay should be distinguished from a supplier’s inability to provide a usable actual emissions value. A temporary gap may justify targeted technical assistance. Where actual values cannot be supported, exporters may need to account for the applicable default treatment when pricing future sales. Continuing to quote on an unsupported emissions assumption transfers the resulting risk into the export margin.
Supplier development may be commercially justified for significant supply relationships. Processors can assist with data requests, technical documentation and coordination across multiple upstream installations. Such expenditure should have defined objectives, including completion of the required evidence package, reduced uncertainty in the calculation and reliable delivery of information for subsequent reporting periods. It does not guarantee a favourable verification outcome.
For steel exporters, procurement, plant engineering and sales teams need to use consistent material quantities and a defensible emissions methodology when calculating finished-product costs. The commercial value of a lower-emission input depends on whether its benefits remain after production losses, documentation expenses, applicable CBAM adjustments and negotiations with the EU customer are taken into account.
Supported by CBAM.Clarion.Engineer
