How emissions evidence affects export costs.

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Why the importer needs emissions records

An exporter may regard a shipment as finished when it meets specification and leaves the port. Under the EU Carbon Border Adjustment Mechanism, its European buyer also needs a defensible account of embedded emissions. Those records affect the buyer's cost calculation.

CBAM's definitive regime began on 1 January 2026. The first annual declaration and certificate surrender for 2026 imports are due by 30 September 2027. A later settlement date does not remove the need to assemble evidence for production and shipments now. ^[1]

The costs can also reach suppliers that have no statutory filing obligation. An EU importer may seek a price adjustment, data warranty or indemnity from its supplier. Whether it can obtain one depends on the contract and bargaining power. We expect reliable emissions evidence to become more important in these negotiations, affecting how much margin suppliers and buyers retain.

Identify which goods and importers are covered

CBAM is not a general tax on every African export. Its existing coverage centres on specified goods in cement, iron and steel, aluminium, fertilisers, electricity and hydrogen. The product's customs classification matters. A country's mining importance does not establish that every mineral or manufactured product is covered. ^[2]

The current mass exemption is also easy to misread. For the relevant cement, iron-and-steel, aluminium and fertiliser goods, the 50-tonne threshold is assessed at the EU importer's annual aggregate level, not separately for each African supplier or shipment. Electricity and hydrogen do not benefit from that mass threshold. ^[3]

A South African producer should therefore map the actual codes, buyers and importing entities before estimating exposure. A DRC business should do the same instead of treating the regime as either universally applicable or irrelevant. Selling to an intermediary changes the contractual chain; it does not, by itself, answer where the goods ultimately enter the EU or which evidence the buyer will request.

Compare verified emissions with default values

The Commission permits declarations using actual verified emissions or prescribed default values. Actual data require independent verification by an appropriately accredited verifier. A sustainability report or an unverified supplier spreadsheet does not automatically satisfy that requirement. ^[4]

The default-value rules contain mark-ups. For cement, iron and steel, aluminium and hydrogen, the prescribed additions are 10% in 2026, 20% in 2027 and 30% from 2028; fertilisers have a different 1% provision. These percentages adjust default emissions values. They are not tariff rates on the invoice or percentages of the shipment's sale price. ^[5]

Defaults will not be more expensive than verified actuals in every case. A genuinely high-emitting installation may have an unfavourable actual result; verification also costs money. The business case is a comparison of permitted methods using the specific product and production route, not an assumption that more data always lowers the bill. Without usable evidence, a supplier cannot demonstrate its actual emissions to the buyer.

Check how electricity enters the calculation

CBAM accounting has its own boundaries. The OECD's October 2026 implementation analysis explains that its product-level rules differ from corporate greenhouse-gas inventories. Under the current Annex II treatment, iron and steel, aluminium and hydrogen are among the goods for which only direct emissions count. ^[6]

Buying renewable electricity may reduce a company's overall emissions, improve supply reliability or meet customer requirements. It does not necessarily reduce the CBAM obligation on a product whose relevant calculation excludes indirect electricity emissions. Nor does a general renewable claim replace the evidence required where electricity does count.

Before presenting a decarbonisation project as a CBAM saving, trace the proposed change into the applicable product calculation. Identify the process emissions, relevant precursors, production boundaries and verification requirements. Distinguish the environmental benefit from the particular financial benefit being modelled. Calculate each benefit separately before including it in the investment case.

Make the calculation traceable

The necessary information crosses functions that often keep separate records: production volumes, fuel and material inputs, supplier data, meter readings, customs codes and invoices. Even an accurate number may be unusable if the records do not link it to the installation, reporting period and goods concerned.

Assign a process owner with authority across operations, finance, procurement and trade compliance. Preserve source records and calculation versions. Agree how upstream suppliers provide data and how errors are corrected. Test whether a verifier could reconstruct the calculation without relying on the employee who built the spreadsheet. This is an internal-control task with commercial consequences.

Contracts should address these records too. Specify the information to be supplied, delivery dates, confidentiality, access for verification, correction procedures and responsibility when the data are late or defective. Avoid giving an unlimited warranty over a regulatory result that depends partly on the importer's own actions or later rule changes. The exact allocation needs transaction-specific advice.

Help smaller producers meet the evidence requirements

The EU's stated objective is to address carbon leakage as domestic carbon pricing evolves. Yet credible measurement and verification impose fixed costs that can weigh heavily on smaller producers. ^[2] Some otherwise competitive suppliers may struggle to afford the evidence they need.

African industry bodies and public agencies have a useful role in shared training, metering capability, access to competent verifiers and consistent technical guidance. Sharing these resources can reduce costs. Each plant still needs records that support its own emissions figures.

Buyers have choices too. They can demand perfect data immediately and replace suppliers that cannot provide it, or invest in a credible improvement timetable with existing partners. The latter can preserve supply diversity and improve actual measurement. It requires milestones and verification, rather than an indefinite exemption from scrutiny. Exporters should budget for data collection and verification alongside changes that reduce production emissions.

Keep current rules separate from proposed changes

CBAM is still developing. The Council agreed a negotiating position in June 2026 on proposed expansion to selected downstream products and anti-circumvention measures. That negotiating position should not be presented as an enacted extension of coverage. ^[7] Exposure models need a clearly dated legal baseline and separate scenarios for proposals.

Default values also need to be kept up to date. The Commission published corrected default values in August 2026. ^[8] A model built on an older downloaded table can be internally consistent and commercially wrong. Record the source, version, assumptions and reviewer alongside the price calculation.

Start with one covered product and an existing buyer. Assemble the production records, compare the permitted calculation methods and agree how costs and corrections will be handled. This establishes what the exporter can prove and whether its emissions performance gives it an advantage under the applicable rules.

A question for your team

Can we prove the emissions performance of a covered product well enough for a buyer to price it with confidence?

Sources & notes

Sources checked on 29 October 2026. This article presents our analysis of the cited research and its implications for businesses. Numbered references link to the original sources.