The European Union’s Carbon Border Adjustment Mechanism (CBAM) has crossed a historic threshold. As of 1 January 2026, what began as a mere reporting exercise in 2023 has become a real border levy, imposing a carbon price on selected imports into the EU. Often dubbed a “green tariff,” CBAM aims to align the carbon costs paid by foreign producers with those borne by EU industries under the Emissions Trading System (ETS).
This shift is reshaping the economics of global trade in carbon‑intensive goods. From steel and cement to aluminium and fertilisers, exporters to Europe now face a powerful price signal that rewards low‑emission production and penalises the most polluting routes. While the mechanism covers only about 3% of EU imports by value at launch, its implications for industrial strategy, climate policy and geopolitics are far‑reaching, and likely to grow.
From Pilot to Payment: CBAM’s Definitive Phase Begins
CBAM entered its “definitive phase” on 1 January 2026, transforming from a transitional reporting tool into a carbon levy collected at the EU border. Initially introduced in October 2023, the mechanism required importers to submit quarterly reports on the embedded greenhouse‑gas emissions of certain goods, but no money changed hands. This reporting-only phase was designed to build the data infrastructure and prepare companies for the more demanding regime to come.
With the start of 2026, obligations have become financial. Importers of covered products, iron and steel, cement, aluminium, fertilisers, electricity and hydrogen, must now purchase CBAM certificates and surrender them annually. The number of certificates corresponds to the verified emissions embedded in their imported goods, meaning the higher the carbon intensity, the higher the cost at the border.
The levy is explicitly tied to the EU ETS, the bloc’s flagship cap‑and‑trade carbon market. CBAM certificate prices track the prevailing allowance price in the ETS, ensuring that foreign producers face a carbon cost broadly comparable to that paid by EU installations. This linkage is central to CBAM’s legal and political justification: the charge is framed not as a classic tariff, but as an extension of the EU’s internal carbon pricing to imports.
How the New Carbon Border Levy Actually Works
In practice, CBAM operates through a system of registration, emissions calculation and certificate surrender. EU‑based importers of covered products must register as “CBAM declarants,” collect detailed emissions data from their non‑EU suppliers, and undergo verification procedures to substantiate the embedded emissions of each product. These data flows, already tested during the transitional phase, now directly determine financial liabilities.
For imports entering the EU in 2026, the legal obligation to cover embedded emissions is in force, but payment has been delayed. Under a 2025 simplification package, importers will begin buying CBAM certificates from February 2027, settling their 2026 obligations retrospectively. This one‑year lag is intended to ease cash‑flow pressures while companies adapt to the new system, though it does not diminish the overall cost they will eventually face.
The price signal is substantial. With EU ETS allowances trading around €71, 74 per tonne of CO₂ in 2025, a tonne of blast‑furnace steel containing roughly two tonnes of embedded emissions would face a surcharge of about €140, 150 at the EU border. For high‑emission production routes in heavy industry, this surcharge can be the difference between profit and loss in competitive export markets, accelerating the search for lower‑carbon processes.
Carbon Leakage, Level Playing Fields and ETS Reform
CBAM’s core rationale is to prevent “carbon leakage”, the risk that stringent climate policies in Europe simply push emissions‑intensive production, investment and jobs to countries with weaker rules. By pricing imported emissions at a level comparable to the ETS, the EU hopes to make relocation less attractive and to avoid undercutting domestic producers who already pay for their carbon footprint.
Historically, the EU cushioned energy‑intensive industries against this risk by granting them free ETS allowances. Those free allocations are now being phased out between 2026 and 2034 as part of broader ETS reform. CBAM and the phase‑out are tightly linked: as free allowances diminish, CBAM applies to an increasing share of embedded emissions in imported goods, slowly tightening the effective carbon cost on both EU and foreign producers.
In 2026, for example, only a small portion of the emissions associated with covered imports, around 2.5%, will actually be subject to the CBAM charge. That share will rise steadily over the coming years in lockstep with the withdrawal of free allowances, converging toward full exposure in the mid‑2030s. This gradualism is meant to give industry time to adapt while still locking in a long‑term decarbonisation trajectory.
Who and What Is Covered: Scope, Exemptions and Future Expansion
At launch, CBAM covers 303 product categories across six sectors: iron and steel, aluminium, cement, fertilisers, electricity and hydrogen. These goods account for roughly 3% of total EU imports by value but represent a disproportionately large share of carbon emissions, given their energy‑intensive nature. The choice of sectors reflects a deliberate focus on basic industrial materials rather than finished consumer products.
EU policymakers have signalled that this is just the beginning. Around 2028, the Commission is expected to assess whether to expand CBAM to additional semi‑finished and manufactured products, such as machinery, appliances or complex metal components. Extending the levy deeper into global value chains would bring more traders and manufacturers into the system, spreading the carbon price signal beyond raw materials and closer to final goods.
There are, however, targeted exemptions. Imports from countries that participate in, or are formally linked to, the EU ETS, such as Norway, Iceland, Liechtenstein and Switzerland, are exempt, on the grounds that their industries already pay an equivalent carbon price. In addition, a “de minimis” threshold exempts importers whose annual volumes of covered goods stay under 50 tonnes, sparing about 90% of importers from CBAM paperwork while still capturing an estimated 99% of embedded emissions.
Data, Compliance and the New Emissions Transparency Regime
One of the most transformative aspects of CBAM is not the levy itself, but the data regime it creates. To comply, EU importers must obtain granular, verified emissions information from their non‑EU suppliers, often down to the level of specific production routes and facility‑level performance. This goes well beyond traditional customs documentation and requires new systems, standards and relationships throughout supply chains.
Industry studies already highlight emissions data gathering as one of the primary operational challenges. Verifying the carbon footprint of a tonne of steel or a batch of fertiliser produced halfway across the world is no trivial task. Companies must invest in monitoring equipment, emissions accounting methodologies and third‑party verification. Inaccurate or missing data can lead to default, often higher, emissions values and therefore higher CBAM costs.
This transparency drive is reshaping procurement practices. EU buyers are increasingly asking suppliers to prove their carbon intensity and, where possible, to switch to lower‑emission processes. Over time, this could standardise emissions disclosure in global industry and make carbon performance as important a procurement criterion as price, quality or delivery time, especially for exporters who depend heavily on the EU market.
Winners and Losers: Recycled Metals, Low‑Carbon Routes and High‑Emission Producers
CBAM does not affect all producers equally. Because it is tied directly to embedded emissions, the mechanism rewards cleaner production routes and penalises dirtier ones. Metal products made largely from recycled materials, such as scrap‑based steel in electric arc furnaces or secondary aluminium smelted using renewable power, tend to have far lower carbon footprints than primary production from ore and coal.
Under current rules, such low‑carbon metals can end up with very modest declared emissions, making their effective CBAM bill close to zero. This creates a powerful incentive for investment in recycling infrastructure, scrap collection and circular‑economy business models. For companies that have already shifted toward secondary production, CBAM can crystallise a newfound competitive advantage in the EU market.
By contrast, producers relying on coal‑heavy power grids or outdated, high‑emission technologies face mounting pressure. Blast‑furnace steel plants in regions with carbon‑intensive electricity, or smelters that depend on fossil fuels, will see their EU export margins squeezed unless they modernise. CBAM thus functions as a global “efficiency compact”: a standing market signal that re‑weights production choices and capital allocation toward lower‑emission options, irrespective of where factories are located.
Global Trade Frictions: Diplomacy, WTO Risks and Divergent Exposures
CBAM’s entry into force has triggered strong reactions from major trading partners. China, India, Brazil and several emerging economies have criticised the mechanism as a disguised trade barrier, arguing that it may violate World Trade Organization principles of non‑discrimination. Many of these countries are contemplating WTO challenges or reciprocal measures, even as they explore their own carbon pricing systems to safeguard EU market access.
The statistical exposure of some partners is modest but politically sensitive. For China, goods currently covered by CBAM account for about €13.4 billion, or 2.8% of the EU’s imports from the country, with projected CBAM fees averaging roughly 0.12% of total imports. Yet Chinese officials view the policy as emblematic of a broader European push to constrain their industrial exports, especially in heavy industry and green technologies.
Other partners face more immediate commercial impacts. Analysis cited by the African Climate Foundation projects that CBAM could reduce Africa’s exports to Europe by around 4%, with South Africa and Mozambique particularly exposed due to their carbon‑intensive metals sectors and reliance on the EU market. India’s steel and aluminium exporters also face immediate costs from 2026, and a recent Global Trade Research Initiative study warns that firms unable to decarbonise or credibly measure emissions will lose competitiveness in Europe.
Regional Reactions: UK, US and the Emerging “Club” of Carbon Markets
Close neighbours and allies are responding in varied ways. The United Kingdom, which operates its own emissions trading system after Brexit, has yet to secure formal linkage with the EU ETS. Without such a deal, British exports of steel, cement and other covered products risk facing full CBAM charges from 2026, prompting UK industry to advocate for a domestic CBAM to protect competitiveness and press for ETS linkage.
In the United States, officials have been wary of unilateral EU climate‑trade measures, but Brussels has worked to limit transatlantic friction. EU simplification efforts and exemptions mean that US exports of covered goods are expected to be “barely affected” at this stage, thanks in part to lower exposure in the targeted sectors and potential recognition of US climate policies. Nonetheless, CBAM adds momentum to US debates over carbon pricing and border adjustments of its own.
Meanwhile, countries already aligned with the EU carbon market, Norway, Iceland, Liechtenstein and Switzerland, enjoy full exemptions for covered goods. This illustrates a key feature of CBAM: it effectively invites trading partners to join or link to the EU ETS, or to demonstrate equivalent carbon pricing, to avoid the levy. Over time, this could help stitch together a “carbon club” of interoperable markets, gradually expanding the reach of explicit carbon pricing beyond the EU’s borders.
Revenue, Industrial Policy and Concerns from Business
Beyond its climate objectives, CBAM is poised to become a significant new revenue stream for the EU. Initial estimates suggest that once fully ramped up, annual receipts could exceed €10 billion and rise toward around €15 billion by the mid‑2030s, depending on ETS prices, the pace of free allowance phase‑out and any scope expansions. These funds are expected to contribute to the EU budget and, indirectly, to green investment.
The European Commission has already signalled that a portion of these revenues will be recycled into industrial support. In 2026 and 2027, around 25% of CBAM income is earmarked for temporary aid schemes for energy‑intensive sectors such as steel and aluminium. The goal is to mitigate competitiveness risks for firms that face both ETS costs at home and CBAM‑related restructuring pressures, while nudging them toward low‑carbon technologies.
Still, business groups remain sceptical about implementation. Industry leaders warn of complex verification requirements, difficulties in distinguishing recycled from primary content, and risks of fraud or misreporting. Many argue that the 2026 start date coincides with already elevated energy and carbon prices, compounding cost pressures and potentially accelerating plant closures in sectors that have limited short‑term decarbonisation options.
CBAM’s definitive launch marks a turning point in the relationship between climate policy and global trade. No longer confined to domestic emissions trading, the EU is exporting its carbon price signal to the border, and, by extension, to factories worldwide that supply the European market. While the mechanism currently touches only a slice of trade flows, it already alters commercial calculations for heavy industry from Asia to Africa, and invites other jurisdictions to move in a similar direction.
The coming years will test whether CBAM can strike the delicate balance it promises: curbing carbon leakage, preserving a viable European industrial base, and nudging global production toward cleaner technologies, all without triggering serious trade wars or undermining multilateral rules. As more data arrive, the debate will shift from theoretical models to real‑world outcomes. For now, one conclusion is clear: with its carbon border levy, the EU has begun to reshape not just its own energy and industrial landscape, but the very rules of the global trading system.
