What Is CBAM? Meaning and Purpose Explained

What Is CBAM? Meaning and Purpose#

So, what is CBAM? CBAM stands for Carbon Border Adjustment Mechanism. It is the EU system for putting a carbon price on imported goods to match the costs EU manufacturers already pay under the EU Emissions Trading System.

If you import steel, cement, aluminium, fertilisers, hydrogen, or electricity into the EU and your good is listed in Annex 1 of the primary Regulation, CBAM applies to you. If you supply these products to EU customers, they need emissions data from you.

The UK is implementing its own version from January 2027.

Why CBAM Exists#

EU manufacturers pay for their carbon emissions through the EU ETS. For example, German steel mill pays for every tonne of CO₂ it emits. This increases production costs.

Without CBAM, two things happen. EU manufacturers move production to countries without carbon pricing, shifting emissions rather than reducing them. Imports from countries without carbon pricing undercut EU producers because they avoid carbon costs entirely.

CBAM levels the playing field. Imported CBAM goods, such as steel, face the same carbon costs as their EU-produced counterparts. The goal is to prevent carbon leakage while encouraging cleaner production globally.

How CBAM Works: The Definitive Regime Explained#

From October 2023 through December 2025, importers submitted quarterly reports showing what they imported, the embedded carbon in those goods, and where production occurred. No financial payments were required during this transitional phase.

The definitive regime began on 1 January 2026. Imports made from that date carry a financial liability, but under the CBAM Omnibus Regulation adopted in late 2025, the actual purchase of certificates was postponed to 1 February 2027. Authorised declarants must submit their first annual declaration and surrender certificates covering all 2026 imports by 30 September 2027, with full compliance obligations applying retroactively.

Certificate prices track EU ETS allowance prices. The Q1 2026 reference price was set at approximately €75.36 per tonne CO₂, with further quarterly prices following through the year. You can estimate your own exposure using our free CBAM calculator.

A new binding de minimis exemption now applies: importers with total annual net imports below 50 tonnes of CBAM-relevant goods are fully excluded from CBAM obligations, including reporting, authorisation, and certificate purchases. This replaces the earlier €150 consignment-value exemption.

Suppliers to EU importers must still provide emissions data. This includes direct emissions from production processes and indirect emissions from electricity consumption. Without supplier data, importers use default values set deliberately high to incentivise actual data provision.

Who CBAM Affects#

CBAM affects EU importers, who must hold Authorised CBAM Declarant status, report emissions annually, and purchase and surrender certificates from 2027 onward. It affects non-EU suppliers, who must provide emissions data to EU customers or risk their products becoming uncompetitive through high default values.

It affects UK businesses in both directions. UK exporters to the EU face EU CBAM obligations through their customers. UK importers will face UK CBAM obligations from January 2027.

Six sectors are currently covered under EU CBAM: cement, iron and steel, aluminium, fertilisers, hydrogen, and electricity. Future expansions will likely include chemicals, polymers, and downstream products from 2028. Explore our sector-specific guidance for details relevant to your industry.

Why CBAM Is Challenging#

Supply chain data collection creates the main challenge. Many suppliers have never monitored emissions to EU standards. They do not understand why emissions data is needed. They may claim it is commercially sensitive.

Calculation methodologies differ by production route and product type. System boundaries determine which emissions are included. Precursor materials create data dependencies through multiple supply tiers. Verification requirements clarified in the December 2025 implementing acts add cost and complexity, and third-party verification of emissions data is now mandatory under the definitive regime when actual emission data is used.

Companies need to understand which products are covered, what data their suppliers can provide, how to calculate embedded emissions, and how to structure compliance processes. The regulations explain what must be done. Implementing those requirements for specific products and suppliers requires deeper analysis.

Our Knowledge Base covers the related standards, including Life Cycle Assessment and Environmental Product Declarations.

What You Need to Know#

CBAM is mandatory for covered goods above the 50-tonne annual threshold, though electricity and hydrogen imports require compliance regardless of volume. Financial liability has applied to imports since January 2026, though certificate purchases and the first annual declaration are not due until 2027 (30 September 2027, covering 2026 imports). Penalties apply for non-compliance.

Understanding what is CBAM at a general level differs from knowing how it applies to your products, your suppliers, and your supply chains. Generic knowledge explains the system. Implementation requires applying that knowledge to your specific circumstances.