CBAM in 2026: the EU’s carbon border tax enters its decisive phase
The Carbon Border Adjustment Mechanism (CBAM), the EU’s policy instrument for putting a carbon price on imports of certain emissions-intensive goods, has entered its definitive period from 1 January 2026. After two years of transitional reporting, the regime now generates revenue, requires the surrender of CBAM certificates, and reshapes trade flows for steel, cement, aluminium, fertilisers, hydrogen, and electricity.
How CBAM works, in one paragraph
EU importers of in-scope goods must, from 2026, declare embedded emissions, surrender CBAM certificates matching those emissions, and pay a price linked to the EU Emissions Trading System (ETS). The objective is to mirror, at the border, the carbon price that EU-based producers pay under the ETS — preventing what regulators call carbon leakage, the displacement of production to lower-priced jurisdictions.
The phase-in of free allowances
CBAM is being introduced in parallel with the phase-out of free ETS allowances for the in-scope sectors. From 2026, free allowances are gradually reduced, fully phased out by 2034. The trade-off is fundamental: as European producers lose their free allowances, they face the full ETS price; CBAM ensures imports face an equivalent cost. Without that link, EU industry would face a competitive disadvantage on its home market.
What is in scope, and what is not (yet)
The 2026 regime covers cement, iron and steel, aluminium, fertilisers, electricity, and hydrogen, plus a broader range of downstream products that contain these inputs. The Commission has signalled that the scope will likely expand to additional sectors — including organic chemicals and polymers — through subsequent legislative cycles. The classification of complex downstream products has been one of the more difficult technical challenges of CBAM design.
The international friction
CBAM has produced predictable diplomatic friction. China, India, and Brazil have raised concerns at the World Trade Organization, framing the mechanism as a unilateral trade measure dressed in climate clothing. Major exporters — including Russia (before sanctions), Turkey, and the United Kingdom — have built mitigation strategies, ranging from carbon pricing reforms at home (which can offset CBAM payments) to investment in cleaner production technologies.
The compliance reality for importers
For European importers, the operational lift is significant. They must obtain verified emissions data from suppliers in third countries — often a major data exercise that requires standardised templates, third-party verification, and ongoing engagement. Customs procedures have been adapted; CBAM declarations are submitted annually to national competent authorities. Penalties for under-reporting are designed to ensure compliance is, in financial terms, the rational choice.
The wider strategic logic
CBAM is, in part, an industrial policy tool. By extending the carbon price to the EU border, it incentivises decarbonisation among trading partners, supports investment in clean European production, and generates revenue that contributes to the EU budget — including, in part, repayments of NextGenerationEU debt. The mechanism is being watched closely by the United Kingdom, Australia, Japan, and even some US states, several of whom are exploring CBAM-like instruments of their own. If 2026 is the year European carbon pricing reaches the border, the rest of the decade may be when it spreads across global trade architecture.
