CBAM (Carbon Border Adjustment Mechanism) is the European Union’s regulatory framework designed to reduce carbon leakage risk and extend the carbon cost created under the EU Emissions Trading System (EU ETS) to certain imported products. It requires that embedded greenhouse gas emissions generated during production are calculated and reported, and in later phases aims to balance imports through a cost aligned with EU carbon pricing.
In short, CBAM’s objective is to prevent imported goods from gaining a price advantage by entering the EU market without bearing carbon costs while EU producers do. This supports fair competition and helps reduce the shift of production to jurisdictions with weaker climate policies (carbon leakage).
CBAM (Carbon Border Adjustment Mechanism) is an EU regulation that requires certain imported goods to calculate and report the greenhouse gas emissions embedded in their production. Its goal is to reduce carbon leakage and align imports with EU carbon pricing, preventing non-EU producers from gaining a competitive advantage by avoiding carbon costs.
CBAM: Why It Is Not a “Distant EU Regulation” for non-EU Companies?
CBAM is not a “distant” regulation for companies that regularly export to the EU, because it focuses not on product price, but on embedded emissions generated during production. As a result, the process goes beyond an additional customs declaration and requires companies to collect site-level energy and production data and translate it into product-level emissions calculations—directly influencing competitiveness and creating near-term cost exposure.
Which Products Does CBAM Cover?
CBAM’s initial implementation phase is designed to focus on sectors that are emissions-intensive and exposed to high carbon leakage risk. The main product groups currently covered include:
- Cement
- Iron and steel
- Aluminium
- Fertilisers
- Electricity
- Hydrogen
Given these sectors’ weight in the global market, CBAM is not merely a regulation to “monitor.” For many companies, it is an operational compliance area that must be actively managed through data collection, product-level emissions calculation, and reporting.
What Are Embedded Emissions and Why Does CBAM Focus on Them?
Embedded emissions are the total greenhouse gas emissions generated during a product’s production and attributed to that product. In CBAM reporting, embedded emissions are typically understood through two core components:
- Direct emissions: On-site fuel combustion and process emissions (Scope 1)
- Indirect emissions: Emissions associated with purchased electricity used in production (Scope 2)
The critical difference is this: knowing corporate totals is only a starting point; CBAM primarily seeks to understand how those totals are linked to products. That is why product-level traceability becomes a key determinant of reporting quality.
Why Does CBAM Reporting Require “Scope 3-Like” Thinking?
Methodologically, CBAM reporting relies primarily on Scope 1 and Scope 2 emissions data. In practice, however, producing a robust and defensible embedded emissions figure requires companies to adopt an approach similar to Scope 3 supply chain discipline.
This is because the reporting process inevitably raises operational questions such as:
- How will emissions from precursors (intermediate products) used in the final product be addressed?
- Is supplier data available for critical inputs, and if not, how will data gaps be managed?
- When allocating total site emissions to products, which processes, production lines, or measurement points will be used as the basis?
For this reason, CBAM is not limited to “doing the calculation.” It requires establishing processes for data requests, verification, standardisation, and traceability (audit trail)—bringing governance and data-management reflexes commonly used in Scope 3 programs into CBAM operations.
Which Calculation Approach Is Essential for CBAM?
CBAM does not accept a spend-based approach as a sufficient basis. The question “How much did we spend on energy?” does not provide a reliable foundation for CBAM. What matters is activity data, such as:
- How many kWh of electricity were consumed?
- How many Sm³ of natural gas were burned?
- How many tonnes of product were produced?
- How is this consumption linked to a specific product line/process?
That is why CBAM often becomes the first strong driver for many companies to establish a truly activity-based emissions accounting discipline.
How to Calculate Embedded Emissions
What makes CBAM reporting sustainable in practice is not the formula itself, but the process design. The steps below help build a structure that is also defensible under verification.
1) Define product and system boundaries
Clarify scope first: which CBAM product is covered, and which production steps are included? This step forms the answer to the question you will be asked later: “What did you include and why?”
2) Collect site-level activity data
A minimum dataset typically includes three elements:
- Fuel consumption (natural gas, coal, fuel-oil, etc.)
- Electricity consumption (kWh)
- Production volumes (tonnes/units, ideally with product breakdown)
Where possible, the source of data should be meters, energy management systems, and production records. The goal is to provide a clear answer to: “Where did this number come from?”
3) Match the right emission factors
Activity data is not emissions on its own; emission factors convert it into emissions. The most common errors include:
- Using fuel emission factors inconsistently by mixing sources
- Calculating electricity emissions with an emission factor that does not align with the chosen methodology
Even small errors here can significantly distort product emissions intensity.
4) Calculate total site emissions
The core logic is simple: consumption × emission factor. What matters is building an evidence trail alongside your calculation (records, report outputs, meter readings, ERP production logs).
5) Allocate total emissions to products (allocation)
This is the most technical and most debated part of CBAM reporting: distributing total site emissions across products.
Two common approaches in practice are:
- Mass-based allocation: workable if products share similar processes
- Line/meter-based allocation: the strongest approach if line-level measurement is available
Whichever method you choose, document it and clearly justify it. In verification, the key question will be: “Why did you allocate emissions this way?”
6) Produce product emissions intensity
The most useful CBAM output is a product-level intensity figure:
- tCO₂e / tonne of product
- Separate breakdown for direct (Scope 1) and indirect (electricity) emissions
- Reporting period, site, product code, methodology notes
This output becomes the single source of truth not only for CBAM reporting, but also for customer requests, sales discussions, and pricing decisions.
Example CBAM Scenario: Aluminium Profile Manufacturer
Because aluminium profile production is electricity-intensive, two points are decisive under CBAM: electricity traceability and the robustness of product-level allocation. When there are multiple lines and product families, a single average value can quickly become misleading.
A typical well-functioning approach looks like this:
- Calculate site-level Scope 1 plus electricity-related emissions
- Disaggregate emissions by product families/lines (preferably using meters)
- Report product-level intensity for products exported to the EU
- Formalise and file the allocation methodology
What makes CBAM “manageable” is the ability to repeat this discipline consistently in every reporting period.
Most Common Mistakes in CBAM Reporting
The mistakes that most often require rework include:
- Proceeding with spend-based assumptions
- Leaving product boundaries unclear
- Using the wrong electricity emission factor/methodology
- Failing to document product-level allocation
- Relying on estimates instead of meter/production data
These mistakes weaken the report and, more importantly, make it harder to defend during verification.
Why Are CBAM, CSRD, and IFRS S2 Part of the Same Picture?
CBAM is often perceived as a technical compliance requirement, but its impact is financial: cost, competitiveness, investment planning, and pricing. For this reason, the product-level emissions data generated through CBAM can, over time, feed into both CSRD risk/impact narratives and IFRS S2 financial impact analyses.
How Should Companies Prepare for CBAM?
CBAM preparation cannot be placed on a single department’s shoulders. A practical preparation framework includes:
- Clarify scope: products, sites, EU markets
- Build activity-based infrastructure: make energy and production data regular and traceable
- Define roles: production–energy–finance–sustainability must work together
- Standardise allocation: document the product-level allocation methodology
CBAM Moves Carbon Management to the Product Level
With CBAM, carbon performance is no longer a general indicator assessed at “company total” level. The increasingly decisive question in the EU market is: How much embedded emissions were generated in the production of this product?
In this new era, competitive advantage will belong to companies that can build activity-based data infrastructure, manage data in a traceable and audit-ready way, and turn product-level emissions calculation into a consistent reporting process.
Frequently Asked Questions (FAQ)
In the transitional period, the focus is reporting. The cost impact becomes more visible in later phases of the mechanism.
Directly, yes. Indirectly, your customers selling into the EU may request product-level emissions data.
No. Product-level embedded emissions consider both direct (Scope 1) and electricity-related indirect emissions (Scope 2).
