CBAM entered its definitive phase on 1 January 2026, marking the first major implementation milestone. A proposed extension to downstream products is now being discussed with 1 January 2028 identified as a potential next critical date. The impact would be most relevant for manufacturers of steel- and aluminium-intensive goods that are not currently covered. If adopted on the European Commission’s proposed timetable, companies would have less than two years to prepare data systems and compliance processes.
The European Commission’s strengthening package proposes applying the downstream extension from 1 January 2028. Negotiating positions have been adopted by the Council and Parliament, but key elements remain unresolved, including the final product scope, methodology and transitional arrangements. The package also includes proposed anti-circumvention measures and changes to electricity rules. As a result, 2028 could function as a broader redesign point for CBAM rather than only adding new products.
Downstream coverage in 2028 and cost variables for manufacturers
Manufacturers entering CBAM in 2028 could face a more demanding cost environment than importers of basic materials experienced at the start of the definitive regime. For most covered steel and aluminium goods under the existing schedule, default-value mark-ups rise to 30% in 2028. At the same time, free allocation under the EU Emissions Trading System continues to phase down. The combination could increase financial consequences for firms relying on default values or entering without adequate emissions evidence.
Preparation is expected to focus on records that need continuity over time. The source requirements include supplier installation identity, precursor emissions, bill-of-material quantities, production allocation and product classification. If final legislation requires evidence linked to 2028 production, reconstructing these relationships after the reporting period closes may be difficult or unreliable. This timing constraint affects how far back records must be maintained and how they are linked to later reporting.
Companies are also advised to start mapping products and supply chains even while legal scope remains uncertain. The preparation elements listed include product classification, supplier data access, installation identification and controlled emissions monitoring. These steps are intended to support readiness under several potential legislative outcomes. The approach is designed to reduce dependence on a single final interpretation of coverage.
Managing legal status during negotiations on CBAM scope
Legal-status management is described as essential while negotiations continue on downstream coverage. Firms are expected to distinguish between current legislation, adopted implementing rules, Commission guidance and proposals still under negotiation. Each interpretation should be recorded with its source and date. This is intended to keep internal compliance work aligned with what is actually in force.
The separation of current law from proposed reform is also linked to contract and documentation control. The source notes that contracts, customer presentations and internal procedures should not treat a negotiating position as an existing legal requirement. It also highlights that updating controlled interpretations when final text changes can avoid correcting numerous spreadsheets and documents maintained by different teams. A scenario-based approach is presented as a way to progress without prejudging outcomes.
Under the scenario approach described, companies compare the current-law position with the Commission proposal and identify principal differences between Council and Parliament positions. Actions that remain useful across scenarios can then be selected without assuming which elements will prevail. For capital expenditure decisions tied to a narrow legislative outcome, further legal certainty may be needed. In contrast, improvements such as product classification, supplier data rights and monitoring procedures can begin earlier.
Contracting, financing assumptions and carbon-cost pass-through
The proposed date has implications for agreements signed before final scope is known. Multi-year supply contracts concluded in 2026 or 2027 may extend into 2028 if downstream coverage is adopted for relevant products. This creates a need to consider change-in-law provisions and carbon-cost pass-through clauses within those agreements. Contracting parties are expected to address how additional costs would be allocated if products enter CBAM coverage.
The contracting guidance also covers what emissions evidence suppliers must provide if coverage applies. It further notes that changes in applicable methodology should be handled through contractual terms. Provisions should distinguish existing legal obligations from potential future requirements arising from the extension. This distinction is intended to clarify responsibilities across different stages of implementation.
Banks and investors financing industrial expansion are described as needing scenario testing for a 2028 CBAM environment. The source specifies testing whether project margins, customer pricing and debt assumptions remain viable under uncertainty about the final product list and methodology. The analysis should account for uncertainty rather than treating the extension as settled law. For Western Balkan manufacturers supplying EU customers, the proposed date could coincide with broader shifts in market-access expectations, electricity decarbonisation and pressure for lower-carbon products.
Readiness milestones before final downstream legislation
Management is expected to establish internal milestones before final legislation is adopted. Priorities listed include completing CN-code screening, securing supplier data rights, piloting product-level emissions allocation and defining contractual procedures for potential carbon-cost changes. The measures can proceed while capital spending remains conditional on final scope decisions. A readiness plan should identify responsible teams, deadlines, data owners and approval procedures.
The source also describes how the underlying compliance file should connect purchasing, production, customs and finance records. Companies should be able to explain calculations to both a verifier and a commercial manager using the same evidence set. This includes documenting assumptions behind results and circumstances under which they might change. A minimum decision file should document legal status, customs treatment, data owner, implementation deadline and change-control decisions.
The decision file should also specify who approves key assumptions and what fallback applies if preferred treatment cannot be substantiated. Early definition of these arrangements is presented as a way to reduce risk of discovering material exposure only when challenged by a verifier, customs authority or authorised declarant. The source links this risk control to how claims are supported at verification time.
Planning horizon for industrial exporters ahead of 1 January 2028
The downstream extension remains subject to negotiations, so companies are advised not to treat 1 January 2028 as confirmed for every product under discussion. Even so, the proposed timetable provides a planning horizon for industrial exporters, importers, lenders and investors referenced in the source material. If CBAM reached basic materials in 2026, then 2028 could extend coverage to factories transforming those materials into finished goods.
The source concludes that businesses building reliable product and supplier data now would be better positioned to assess final rules, update contracts and respond to new obligations without reconstructing records at the last minute once reporting requirements take effect.