Southeast European cement and fertiliser producers may face CBAM exposure linked to materials manufactured outside their own facilities. For cement grinding plants and fertiliser blending businesses, emissions tied to upstream inputs can outweigh those from local processing. This places supplier data and sourcing decisions at the centre of information provided to EU customers.
While both sectors rely on upstream materials, their emissions calculations follow different production boundaries and monitoring requirements. Cement assessments must cover clinker, finished-product composition and processing activities. Fertiliser calculations depend on chemical precursors, nitrogen content and the specific manufacturing route, meaning that approaches used for other industries would not capture these sector-specific needs.
Clinker sourcing and composition requirements for cement reporting
The European Commission’s sector guidance addresses clinker’s role in a composition-based calculation for cement. A grinding plant purchasing clinker must identify the source, obtain the applicable emissions information, and include relevant emissions from its own processing activities. The clinker source therefore affects both procurement documentation and the calculation inputs.
Clinker content is a key parameter in cement emissions reporting and procurement. If a grinding business changes the clinker share, it must assess the potential emissions effect alongside product composition, strength requirements and customer specifications. Reducing the clinker ratio can only be advantageous if the resulting cement remains suitable for its intended use and alternative constituents are reliably available.
Producers are expected not to rely on lower calculated carbon intensity alone when making commercial claims. Material traceability is also central to the calculation process. A plant may receive clinker from multiple production installations, store it, and allocate it across different cement products, requiring a defensible link between sources, quantities consumed and resulting output.
Annual purchase totals may not reflect the input mix used during the reporting period. Local electricity and fuel consumption records may be easier to obtain than upstream clinker emissions reports. The challenge is heightened when purchases are made through traders rather than directly from producing installations.
Supply agreements should cover access to evidence needed for the calculation. Any change in clinker source should trigger a review of both documentation availability and technical quality requirements.
Chemical routes shape fertiliser calculations under CBAM
Fertiliser manufacturers face different upstream dependencies than cement grinders. The Commission’s guidance identifies chemical precursors such as ammonia and addresses indirect electricity emissions where applicable. For nitric acid production, monitoring of nitrous oxide (N₂O) is required using the relevant measurement approach.
The production route must be mapped before an operator can determine which information is needed for the calculation. A fertiliser blending facility purchasing chemicals may have relatively limited emissions at its own site while relying on multiple upstream production records. Management needs to identify covered inputs and determine how their quantities and relevant characteristics feed into the finished product’s calculated emissions.
A supplier’s general sustainability report may offer background but may not include product-specific or installation-specific evidence required for the calculation. Product composition also affects how emissions figures are communicated to customers. Comparisons between fertilisers should use consistent product definitions and applicable units, because figures expressed per tonne of commercial product should not be compared indiscriminately with figures based on different functional units or compositions.
Manufacturers should state what each reported intensity represents and keep that definition consistent across documentation and customer communications.
Electricity treatment alongside precursor emissions
Electricity plays a different role in these sectors compared with a direct-emissions-only approach applicable to Annex II metal goods. Cement and fertiliser producers must examine electricity consumption and relevant calculation factors under rules governing their products. This means electricity-related parameters can influence results even when local processing is limited.
For businesses considering renewable electricity arrangements, verification is needed to confirm whether arrangements meet applicable requirements for the intended emissions treatment. A general claim that electricity is renewable does not automatically establish compliance under the relevant methodology.
Energy procurement should be assessed together with precursor sourcing. A cement plant may improve its electricity supply while still being heavily exposed to a high-emissions clinker source. A fertiliser blender may reduce energy use at its facility while emissions from purchased chemicals continue to dominate its product calculation.
Investment decisions should compare how each emission source contributes to identify where reductions are most feasible. Upstream improvements may offer the largest impact even when local energy-efficiency measures remain financially worthwhile.
Inventory, logistics costs, and evidence reliability
Seasonal procurement and stock management can affect how reliable emissions records are. Producers may buy materials ahead of expected demand or maintain buffer inventories to protect against supply interruptions. Reporting teams must distinguish between quantities purchased during a period and quantities actually consumed in production.
This distinction supports a more reliable calculation and helps explain differences between cash purchasing expenditure and material costs attributed to current production. Transport, storage and financing costs also need consideration when comparing alternative suppliers. Switching clinker or ammonia sources can change freight expenditure, warehousing requirements and working-capital needs even if those costs do not form part of the embedded-emissions boundary used for CBAM calculations.
The commercial sourcing model should remain consistent with the regulatory calculation while maintaining a clear separation between financial costs and emissions included under CBAM.
Controls for evidence gaps in upstream input data
Smaller cement and fertiliser producers can start by focusing on a limited number of critical inputs rather than investing immediately in extensive automation. A precursor register, supplier documentation schedule, and reconciliation of consumption against production can help identify information gaps that matter most for calculations.
Additional meters and monitoring controls should be prioritised where they improve reliability of parameters required by the applicable calculation method. Investment should respond to defined monitoring needs rather than simply increase equipment installed.
Producers also need to separate changes in reported emissions intensity from changes in their final CBAM certificate requirement. The certificate calculation and adjustments must be assessed separately because a percentage reduction in reported intensity does not necessarily translate into an equivalent percentage reduction in final cost.
EU customers may value lower reported intensity for commercial or environmental reasons, but financing decisions should be based on expected cost effects under applicable rules rather than an assumed proportional relationship.
For Southeast European cement and fertiliser exporters, procurement decisions can determine a substantial part of final export position. The most useful comparison involves complete supply routes that provide both technically acceptable products and documentation needed to support emissions calculations. Efficient grinding and blending operations cannot replace missing production data for materials received.