The EU’s Carbon Border Adjustment Mechanism (CBAM) enters its definitive regime in 2026. From that point, EU importers and indirect customs representatives importing above the 50-tonne single mass-based threshold must be authorised as CBAM declarants. They must declare embedded emissions and surrender CBAM certificates. Certificate prices are linked to the EU ETS allowance price, and a carbon price paid in the country of production may be deducted where proven.
CBAM currently covers cement, iron and steel, aluminium, fertilisers, hydrogen and electricity. For embedded-emissions calculations, indirect emissions refer to emissions from electricity consumed during production. Under the definitive framework, CBAM is limited to direct emissions for iron and steel, aluminium and hydrogen. Cement, fertilisers and agglomerated iron ore must declare both direct and indirect emissions.
Electricity measurement remains relevant for steel and aluminium because a Commission technical study in June 2026 examines default electricity emission factors. It also reviews conditions for claiming actual indirect emissions, including power purchase agreements and direct technical links with verification. The study further considers possible extension of indirect-emissions coverage to additional CBAM sectors.
How electricity consumption becomes embedded indirect emissions
The embedded-emissions approach uses a formula that links electricity use to an emission factor. Indirect embedded emissions are calculated as electricity consumed in the production process multiplied by an applicable electricity emission factor, then allocated per tonne of product or per relevant functional unit. The electricity factor can be a grid factor or an actual electricity factor where CBAM rules allow it.
The value of a renewable electricity purchase depends on whether the buyer can use that purchased electricity as an actual emissions input in the CBAM calculation. If the buyer cannot do so under the applicable rules, the calculation is instead based on national or regional default factors. This makes the evidence package attached to electricity procurement central to CBAM-ready claims.
Electricity procurement structured as a CBAM data contract
A factory purchasing electricity is described as buying evidence in addition to MWh. A CBAM-ready electricity purchase agreement should combine physical or contractual supply with metered generation and consumption data. It should also include emission-factor evidence and audit rights.
On the buyer side, industrial factories are expected to require detailed identification of the generation asset from the electricity seller. The information includes technology, location, installed capacity, grid connection point, metering point, balancing party, delivery profile and settlement period. Buyers are also expected to obtain ownership information for environmental attributes rather than relying on generic statements that electricity is “renewable.”
On the seller side, renewable producers or suppliers must provide more than invoices. The evidence package should include generation-meter data, net electricity exported and hourly or sub-hourly generation profiles. It should also cover plant emission factors, meter calibration records, outage and curtailment records, delivery schedules and confirmations from market operators or TSOs/DSOs where available.
Where instruments such as Guarantees of Origin, I-RECs or equivalent certificates are used, certificate cancellation records are part of the required evidence package. For wind, solar and hydro, the CBAM logic focuses on direct CO₂ emissions during electricity production rather than upstream emissions such as manufacturing and installation of wind turbines. The evidence requirements therefore distinguish between production-phase emissions accounting for electricity and broader lifecycle claims.
PPA strength compared with retail contracts using unbundled certificates
The most robust structure referenced is behind-the-meter renewable generation or a direct technical link between the generation source and the factory. A second-best structure is a physical PPA with a named generator supported by metering, scheduling, certificates and audit rights. The weakest structure is described as an ordinary retail supply contract using unbundled green certificates.
Commission guidance during the transitional phase states that actual electricity emission factors may be used when there is a direct technical link or a power purchase agreement between producer and consumer. It also states that market-based certificates such as Guarantees of Origin or Green Certificates cannot by themselves justify actual emission factors under this approach.
The material characterises GOs and I-RECs as control documents rather than substitutes for CBAM-grade arrangements covering PPA structure, metering and allocation. Certificates are described as supporting renewable claims while helping prevent double counting. However, product-level embedded-emissions calculations must be built from metered consumption linked to acceptable emission factors and product-level allocation.
Linking electricity procurement with product-level MRV documentation
The verification framework requires two linked buyer-seller relationships: one for electricity procurement and another for product sales into the EU market. In this setup, the factory is both buyer of electricity and seller of CBAM-relevant product data to the EU importer.
The EU product buyer is expected to request a “CBAM Electricity And MRV Annex” from the factory seller. The annex should require installation name, location and operator identity along with CN codes. It should also cover production routes, functional units, production volumes, direct emissions and indirect electricity consumption.
The annex is further expected to include an electricity source split plus emission factors used with evidence for each factor. Precursor data are required along with carbon price paid where relevant. It should also confirm whether actual verified emissions are being used or whether default values apply.
The buyer should also request a green electricity evidence file containing PPA documentation, generator identity and plant technical descriptions. Additional elements include grid connection evidence, metering hierarchy details, generation data and delivery data. The file should list certificate serial numbers with cancellation confirmations plus settlement records and a no-double-counting declaration.
If a trader sits between generator and factory, contracts must pass through generator-level data rights rather than relying on invoice-level claims alone. A trader invoice with a green label is described as insufficient within this evidence chain. The factory seller is then expected to provide monthly reconciliation mapping total grid imports to PPA-supplied quantities alongside on-site renewable generation.
Monthly reconciliation cycles and verification-ready data rooms
The monthly reconciliation described includes total grid imports plus on-site renewable generation under relevant arrangements such as PPAs. It should show backup generation, exported volumes, auxiliary consumption and process-level electricity use before final allocation to CBAM goods. The calculation must reconcile with ERP production data plus SCADA or EMS data.
The reconciliation also needs alignment with electricity meters, invoices and product output records used for reporting boundaries. Beyond reconciliation outputs, buyers are expected to request a verification-ready data room rather than only a PDF certificate. The data room should include monitoring plans, meter lists and data-flow maps alongside control procedures.
It should also contain allocation methodology details plus production process boundary maps tied to PPA evidence. An “electricity ledger” and a “product emissions calculation workbook” are part of the described documentation set along with management sign-off materials and change logs.
For embedded emissions declared in CBAM goods imported from 1 January 2026, verification by an accredited CBAM verifier is required according to the described framework. The declarant includes the operator’s calculation and verification report in the CBAM declaration submitted by authorised parties.
Contract protections for EU importers facing declarant responsibility
The material notes that EU importers remain commercially exposed because declarants are legally responsible for CBAM declarations including verification reports. As a result, product buyers are expected to include contract protections in supply agreements covering data accuracy warranties.
These protections include audit rights plus obligations on sellers to correct errors identified during verification processes or audits. They also include notification requirements if there are changes in electricity supply or production route before shipment occurs.
The contract protections described further include indemnity for additional CBAM certificate costs caused by incorrect seller-provided data. They also include a right to suspend “CBAM-ready” status where verification evidence fails under agreed conditions between buyer and seller.
MRV system design starting from installation boundaries
A CBAM-ready factory MRV system is described as beginning with installation boundaries rather than starting from PPA arrangements alone. Factories must define which installations, production processes, CN codes and functional units are covered by their MRV scope.
The framework referenced does not allow artificial splitting of the same CN-code production process based on whether batches are sold into EU markets or elsewhere under separate sales channels. Commission Q&A guidance cited here states that within one installation there cannot be more than one production process per same functional unit for this purpose.
The same guidance cited states that EU-bound lots cannot be artificially split from non-EU-bound lots for the same CBAM good under these conditions. This approach is presented as directly affecting how “green product” marketing claims can align with MRV boundaries rather than relying on limited volumes of renewable power assigned selectively to EU sales.
Energy-balance tracking across MWh categories
The described MRV system uses an energy-balance approach within its electricity module. It records every MWh entering an installation plus every MWh generated on site and exported from site where relevant. It also records every MWh consumed by each relevant production process within reporting boundaries.
The system categories described include on-site renewable generation plus direct-line supply supported by defined contractual links such as PPAs backed by metering arrangements. Other categories include ordinary grid supply plus backup diesel or gas generation alongside unverified supply categories where applicable evidence does not meet requirements.
Each category receives its own emission factor assignment alongside an associated evidence status within this framework. The product module then converts this tracked ledger into specific embedded indirect emissions based on allocated process-level consumption patterns tied to product outputs.
Allocation examples using weighted mixes instead of marketing assumptions
An example provided describes cement or fertiliser lines consuming 100,000 MWh over a reporting period while producing 500,000 tonnes of CBAM goods. In that example scenario, electricity intensity equals 0.20 MWh/t before further allocation adjustments tied to qualifying arrangements.
A second example scenario describes 70,000 MWh covered by a qualifying renewable PPA with an accepted low actual factor alongside 30,000 MWh treated as grid electricity within the same reporting period. Under this approach, product-level indirect emissions must be calculated from the weighted electricity mix rather than assuming exported portions are fully green based solely on marketing claims.
Monthly controls feeding year-end reporting packs
The MRV system includes a monthly control cycle at month-end close procedures described in operational terms rather than narrative terms alone. Meter data are frozen at month-end followed by reconciliation against invoices plus settlement data used for energy accounting.
PPA generation is matched to consumption while certificates are reconciled within this cycle before allocating electricity across production processes tied to reporting boundaries.
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