Introduction

The Carbon Border Adjustment Mechanism, or CBAM, is a new policy from the European Union (EU) to help fight climate change. It puts a price on the carbon pollution created when making certain goods that are imported into the EU. This encourages countries outside the EU to make their industries cleaner. CBAM is a smart step by the EU to make global trade greener and fairer. By pricing carbon on imports, it pushes everyone toward cleaner ways of making things. As it moves from testing to full action in 2026, businesses worldwide need to prepare.

What is CBAM?

CBAM is like a tax on carbon emissions for imported products that produce a lot of pollution during manufacturing. It's the EU's way to make sure that goods coming from other countries pay for their carbon footprint, just like EU-made goods do under the EU's rules. The goal is to level the playing field and stop "carbon leakage," which is when companies move dirty production to places with weaker environmental laws. CBAM started in a test phase in October 2023 and will fully kick in by 2026.

Why Was CBAM Created?

Climate change is a worldwide issue, so the EU wants global solutions. Inside the EU, companies already pay for their carbon emissions through the Emissions Trading System (ETS), which puts a price on pollution to encourage cleaner ways of working. But without CBAM, cheaper, dirtier imports could undercut EU products and make companies shift jobs abroad. CBAM fixes this by charging imports based on their embedded carbon – the pollution from making them. It's designed to follow World Trade Organization (WTO) rules and push other countries to adopt better climate policies.

Which Sectors Are Covered?

Right now, CBAM applies to goods that are very carbon-heavy and at risk of leakage. These include cement, iron and steel, aluminium, fertilisers, electricity, and hydrogen. It also covers some related items like screws and bolts made from these materials. When fully running, CBAM will cover more than half of the emissions from industries in the EU's ETS. The EU might add more sectors later, but these are the starting ones.

Timeline of Implementation

CBAM has two main stages:

• Transitional Phase (October 2023 to December 2025): This is a learning period where importers just report the emissions in their goods, without paying anything. The first reports were due by January 2024. It helps everyone get used to the system and improve how emissions are calculated.

• Definitive Phase (Starting January 2026): From here, importers must buy and hand over CBAM certificates for the emissions in their imports. This lines up with the EU slowly stopping free pollution allowances for its own industries. Sales of certificates for 2026 emissions will begin in February 2027.

How Does CBAM Work?

1. Importers register with their country's CBAM authority.
2. Each year, they declare the emissions in their imports.
3. They buy CBAM certificates priced based on the average weekly EU ETS allowance price (in euros per tonne of CO2).
4. If the exporting country already charges for carbon, that amount can be deducted to avoid double payment.
5. Certificates are surrendered to cover the emissions.

This makes sure imports aren't cheaper just because they pollute more elsewhere.

Reporting and Compliance

During the transitional phase until 2025, importers use the CBAM Transitional Registry to file quarterly reports on emissions. They need to get authorised as CBAM declarants soon, through their national authority. The EU offers tools like webinars and e-learning to help. Recent simplifications include a de minimis threshold (small exemptions) and other changes to make it easier.

Impacts and Benefits

CBAM helps cut global emissions by encouraging cleaner production worldwide. It protects EU jobs and industries from unfair competition. Studies show it can reduce carbon leakage and support the EU's goal of net-zero emissions by 2050. For developing countries, the EU provides guidance and support to green their industries and set up carbon pricing.

Criticisms and Challenges

Some worry CBAM could raise costs for importers and hurt trade with poorer countries. There are concerns about how to accurately measure emissions and potential trade disputes. But the EU says it's fair and WTO-compliant. Simplifications in 2025 aim to address some issues, like making rules clearer.

Recent Updates as of October 2025

In October 2025, the EU published an amended regulation to simplify and strengthen CBAM. This includes 10 key changes, like easier reporting and a central platform for certificates. The Council approved these in September 2025. More rules are expected by late 2025 and early 2026. In March 2025, rules for authorising declarants were set, and a list of national authorities came out in August. The transitional phase is ongoing, with full payments starting in 2026.