The Carbon Border Adjustment Mechanism has moved from policy proposal to operational reality. If your company imports goods into the European Union — or relies on suppliers that do — CBAM is not a future concern. It's a current one.
Understanding what CBAM actually requires, and where the carbon data bottlenecks will appear, is the difference between managing this proactively and getting an unpleasant surprise at the border.
The mechanism in plain terms
CBAM puts a carbon price on certain goods imported into the EU, calibrated to match what EU producers pay under the EU Emissions Trading System. The logic is straightforward: if European manufacturers face a carbon cost and overseas competitors don't, EU carbon policy creates competitive disadvantage rather than environmental benefit. CBAM is designed to close that gap.
Currently covered sectors: cement, iron and steel, aluminium, fertilisers, electricity, and hydrogen. These were chosen because they are emissions-intensive, trade-exposed, and at highest risk of carbon leakage — the phenomenon where production moves to jurisdictions with weaker climate regulation.
The transitional phase required quarterly reporting without financial obligation. That phase is over. Importers now need CBAM certificates — and to get them, they need verified embedded emissions data from their suppliers.
What "embedded emissions" means
CBAM is calculated on the embedded emissions in imported goods — the greenhouse gases released during the production process, not during transportation or use. For steel, that means the emissions from the steelmaking process itself: the blast furnace, the electric arc furnace, the energy inputs, the process gases.
For complex goods made from covered materials, you need to track embedded emissions through the manufacturing chain. A steel component imported as part of a larger assembly still triggers CBAM based on the steel's embedded emissions.
If your supplier can't provide verified embedded emissions data, the default fallback is EU-published reference values — which are set conservatively high, typically at the worst-performing 10% of producers in the relevant sector. In practice, this means paying more than you would if your supplier provided real data.
The supply chain data problem
Here's where things get complicated for procurement teams. Your CBAM obligation is based on data that sits with your suppliers, often in countries where carbon measurement practices are less developed than in Europe.
A Turkish steel producer selling into the EU market now needs to calculate, document, and be able to verify their production emissions at a facility level. Many can do this. Many can't yet — or are producing numbers that wouldn't survive external verification.
For buyers, the practical implication is a new due diligence requirement. You need to know which of your suppliers in covered sectors can provide credible embedded emissions data, which ones are working toward it, and which ones will leave you exposed to default values.
This is a supplier engagement exercise that procurement teams haven't had to do before. It's not technically complex — it's organizationally complex. Someone needs to own it.
Carbon pricing as a sourcing factor
CBAM changes the economics of sourcing decisions in ways that aren't yet fully reflected in procurement models. A supplier in a country with its own credible carbon pricing may generate lower embedded emissions than one in a country with no carbon regulation — not because of technology, but because the incentive structure is different.
Over time, this creates pressure on high-emission production methods globally. That's the intended effect. For procurement teams today, it means adding a CBAM cost column to supplier comparisons. A supplier that looks cheaper on unit price might be more expensive once you account for the CBAM certificates required on their goods.
Tracking this in a spreadsheet is possible for simple supply chains. For manufacturers sourcing from dozens of suppliers across multiple covered sectors, you need a data infrastructure that can handle embedded emissions at the component level and roll it up to the product level.
What to do now
Map your imports against CBAM-covered product categories. If you're importing steel, aluminium, cement, fertilisers, electricity, or hydrogen from non-EU countries, you have an immediate compliance obligation. If you're sourcing those materials from EU producers, they're already inside the ETS and CBAM doesn't apply.
Engage your highest-volume CBAM-exposed suppliers now. Ask specifically about their embedded emissions calculation methodology and whether they have third-party verification in place. The ones who can answer clearly are the ones you want in your supply chain long-term.
Build the internal process for CBAM certificate procurement. This requires knowing your embedded emissions volumes in advance of import, which requires data collection from suppliers to be systematized — not done on a quarterly scramble basis.
CBAM is the first large-scale mechanism that puts a real financial cost on supply chain emissions. It won't be the last. The companies building the data infrastructure to handle it now are building an asset that will pay for itself many times over.