The Climate Report: Key Updates on EU Carbon Border Adjustment Mechanism

UK carbon border charge arrives in 2027 as climate litigation shapes policy

Two separate developments in early 2026 mark a turning point for how governments handle carbon pricing and climate accountability. The UK confirmed it will introduce its own Carbon Border Adjustment Mechanism from January 2027, mirroring the EU’s approach to taxing embedded emissions in imports. Meanwhile, a Dutch court ruled that the Netherlands violated human rights by failing to protect residents of Bonaire from climate impacts.

Both events matter for UK businesses. The carbon border charge will change the cost base for anyone importing steel, cement, aluminium, fertiliser, or hydrogen. The court ruling, though focused on the Netherlands, sets a legal precedent that could force governments to adopt binding emissions targets or face litigation.

For manufacturers and importers, the immediate question is compliance. For businesses with overseas supply chains, the broader question is risk. Climate policy is shifting from voluntary commitments to enforceable obligations, backed by tariffs and legal rulings.

UK carbon border charge takes effect from January 2027

The UK government confirmed in early 2026 that it will legislate for a Carbon Border Adjustment Mechanism in the Finance Bill 2025-26. The mechanism becomes effective on 1 January 2027. It applies to direct emissions embedded in imported goods, covering aluminium, cement, fertiliser, hydrogen, and iron and steel.

The policy aims to prevent carbon leakage. Without it, UK manufacturers face higher carbon costs than overseas competitors. Consequently, production could shift abroad to jurisdictions with weaker climate rules, displacing emissions rather than reducing them. The border charge levels the playing field by making importers pay for the carbon embedded in their goods.

The first accounting period runs from 1 January 2027 to 31 December 2027. Importers must calculate the embedded emissions in covered goods and pay accordingly. Payments for the first year are due by the end of May 2028. After 2027, accounting periods become quarterly, with payments due two months after each period ends.

Notably, the UK will delay including indirect emissions until 2029 at the earliest. Indirect emissions refer to electricity used in production. The EU’s Carbon Border Adjustment Mechanism, which entered its definitive phase on 1 January 2026, includes indirect emissions from the start. The UK delay supports the Energy Intensive Industries Compensation Scheme, which offsets electricity costs for heavy industry.

The UK mechanism also covers precursor emissions. For example, if imported steel contains iron made elsewhere, emissions from iron production count toward the total. This prevents businesses from shifting the most carbon-intensive stages of production to avoid the charge.

The EU’s first declaration and payment deadline arrives on 30 September 2027, covering 2026 imports. UK importers will follow a similar path, though their first payment lands in May 2028. Both systems require detailed emissions data from overseas suppliers, creating new reporting obligations for exporters to Europe and Britain.

Dutch court orders binding climate targets and adaptation plan

In January 2026, the Hague District Court ruled that the Dutch government failed to protect residents of Bonaire from climate impacts. Bonaire is a Dutch Caribbean island facing rising sea levels and increased flood risk. The court found the Netherlands violated the European Convention on Human Rights by not aligning its climate policy with the global goal of limiting temperature rise to 1.5 degrees Celsius.

The ruling goes further than criticising weak targets. It orders the Dutch government to incorporate binding economy-wide emissions reduction targets into national legislation within 18 months. It also requires a detailed climate resiliency plan for Bonaire by 2030, covering flood defences, water supply, and infrastructure adaptation.

The judgment draws on an advisory opinion from the International Court of Justice on the climate emergency. It found that insufficient climate action constitutes a human rights violation when it leaves specific communities exposed to foreseeable harm. Moreover, the court ruled that failing to prioritise adaptation for Bonaire amounted to unlawful discrimination against its residents.

This ruling is part of a broader wave of climate litigation in 2026. Courts in Germany and other jurisdictions have issued similar orders requiring governments to strengthen climate plans. The Dutch case stands out because it combines emissions reduction obligations with specific adaptation measures for a vulnerable territory.

For businesses, the ruling signals that governments may face legal pressure to tighten climate policy faster than planned. If courts can compel binding targets, future policy may become less predictable. Companies with long investment horizons need to account for the possibility of accelerated regulatory timelines.

How the carbon border charge affects UK importers and suppliers

The UK carbon border charge applies at the point of import. If you import covered goods, you must calculate their embedded emissions and pay the corresponding charge. This requires detailed data from your suppliers. Many overseas manufacturers do not currently track or report production emissions at the level of detail the UK mechanism requires.

Embedded emissions include all direct emissions released during production. For steel, this covers blast furnace emissions, energy used in smelting, and emissions from producing any precursor materials like iron ore. If your supplier cannot provide verified emissions data, the UK will apply a default emissions factor, which is typically higher than the actual figure. Therefore, suppliers with good data pay less.

The charge applies only to the difference between the carbon price your supplier already pays and the UK carbon price. If your supplier operates in a jurisdiction with a robust carbon pricing system, you may owe little or nothing. However, imports from countries without carbon pricing face the full charge.

UK businesses in sectors like construction, manufacturing, and engineering will see cost impacts. Cement and steel are particularly exposed. If your supply chain relies on imports from regions with low or no carbon pricing, your input costs will rise. Consequently, some businesses may switch to UK suppliers or seek out overseas suppliers in jurisdictions with equivalent carbon pricing.

The delay in covering indirect emissions until 2029 provides temporary relief for energy-intensive industries. Nevertheless, businesses should prepare for the full mechanism to include electricity emissions within three years. This means evaluating your suppliers’ energy sources now, not waiting until 2029.

Public sector organisations face additional considerations. Many local authorities and government departments have committed to net-zero procurement. The carbon border charge reinforces this by embedding carbon costs directly into import prices. Furthermore, suppliers bidding for public contracts may need to demonstrate low-carbon supply chains to remain competitive.

Court ruling creates precedent for climate accountability

The Hague District Court ruling establishes that climate inaction can violate human rights law. This matters beyond the Netherlands. Similar legal arguments could be applied in other jurisdictions, including the UK. If courts accept that inadequate climate policy discriminates against vulnerable groups, governments may face lawsuits demanding stronger action.

The ruling also sets a timeline. The Dutch government must introduce binding targets within 18 months and deliver a full adaptation plan for Bonaire by 2030. These are not recommendations. They are court orders with legal force. If the government fails to comply, further legal action will follow.

For businesses, the implication is that climate policy may tighten faster than governments currently indicate. Legal rulings can override political timelines. If courts in the UK or EU order accelerated decarbonisation, compliance requirements could shift quickly. This creates planning challenges for capital-intensive sectors with long asset lives.

The ruling also highlights adaptation, not just emissions reduction. Bonaire’s resiliency plan must address flooding, water security, and infrastructure. UK businesses with assets in flood-prone areas or supply chains exposed to climate impacts should consider similar risks. Adaptation planning is moving from optional to essential, particularly for businesses in coastal regions or sectors dependent on predictable weather patterns.

Carbon pricing and legal pressure converge

The UK carbon border charge and the Dutch court ruling represent two sides of the same shift. One uses economic tools to price carbon into trade. The other uses legal tools to enforce climate obligations. Together, they signal that climate policy is becoming less discretionary and more enforceable.

The UK mechanism takes effect in January 2027. Businesses importing covered goods should start gathering emissions data from suppliers now. Default emissions factors will increase costs, so verified data is worth the administrative effort. Additionally, businesses should review their supply chains to identify high-carbon imports that may become uneconomical once the charge applies.

The legal precedent from the Dutch case will take longer to play out. However, it suggests that governments may face increasing pressure to adopt binding targets and detailed adaptation plans. This could lead to faster regulatory change, particularly if similar rulings emerge in other jurisdictions.

Climate litigation is becoming more common and more successful. Courts in multiple countries have ordered governments to strengthen climate action. Businesses should monitor these cases, as they often signal where policy is heading before legislation catches up.

Key details for UK businesses

• The UK Carbon Border Adjustment Mechanism takes effect on 1 January 2027, covering aluminium, cement, fertiliser, hydrogen, and iron and steel.
• Importers must calculate and pay for embedded emissions, with the first payment due in May 2028 for the 2027 accounting period.
• Indirect emissions from electricity will not be included until 2029 at the earliest, providing temporary relief for energy-intensive industries.
• The Hague District Court ruled in January 2026 that the Netherlands violated human rights by failing to protect Bonaire from climate impacts.
• The Dutch government must introduce binding emissions targets within 18 months and deliver a climate resiliency plan for Bonaire by 2030.
• The ruling draws on international law and could set a precedent for similar cases in other jurisdictions, including the UK.
• Businesses should gather verified emissions data from suppliers to avoid higher default charges under the carbon border mechanism.

What UK businesses should consider now

If you import goods covered by the carbon border charge, start engaging with your suppliers. You need accurate emissions data for every shipment. Many suppliers, particularly in developing economies, do not currently track this information. Establishing reporting systems takes time, so beginning conversations now will avoid delays in 2027.

Consider whether switching suppliers makes commercial sense. If you currently import from jurisdictions without carbon pricing, the border charge will increase your costs. Suppliers in regions with established carbon markets, or UK-based suppliers, may become more competitive. Run the numbers before the mechanism takes effect.

For businesses with public sector clients, the carbon border charge reinforces existing procurement expectations. Local authorities and government departments increasingly favour low-carbon suppliers. Demonstrating transparent emissions reporting and low-carbon supply chains will become a competitive advantage in tenders.

The Dutch court ruling, while not directly applicable to UK businesses, signals a trend. Climate policy is moving from political commitments to legal obligations. Businesses should prepare for the possibility of accelerated regulatory timelines, particularly if similar rulings emerge in the UK. Long-term investment decisions should account for the risk of faster policy change.

Adaptation planning is also gaining importance. The Bonaire resiliency requirement highlights that climate impacts are no longer distant concerns. UK businesses in flood-prone areas, or with supply chains exposed to extreme weather, should review their resilience. Insurance costs are rising in high-risk areas, and some locations may become uninsurable. Consequently, adaptation is becoming a financial imperative, not just an environmental consideration.

Training and capacity building will help. Understanding carbon accounting, emissions reporting, and supply chain transparency requires new skills. Our training programs cover carbon measurement and reporting requirements, including how to work with suppliers on emissions data. Building internal expertise now will ease compliance when the border charge takes effect.

For businesses already working toward net zero, the carbon border charge and the legal trend toward binding targets reinforce the commercial case for early action. Companies that reduce emissions now will face lower border charges and be better positioned for tighter future regulation. Moreover, they will be more attractive to public sector clients and increasingly to private sector buyers with their own net-zero commitments.

The combination of economic and legal pressure is reshaping the landscape. Carbon pricing is becoming embedded in trade. Courts are holding governments accountable for inadequate climate action. Businesses that anticipate these shifts will be better prepared than those waiting for final regulations.

Where to find detailed guidance and official information

The UK government has published detailed information on the Carbon Border Adjustment Mechanism. The official factsheet on the GOV.UK website covers scope, timelines, and compliance requirements. It includes information on covered goods, accounting periods, and payment deadlines.

For businesses needing support with carbon measurement and reporting, our compliance services help UK businesses meet emissions reporting obligations and prepare for border adjustment mechanisms. We work with importers and manufacturers to establish the data systems needed for compliance.

The European Union has published comprehensive guidance on its Carbon Border Adjustment Mechanism, which operates in parallel with the UK system. The EU CBAM portal provides technical details on emissions calculation, reporting formats, and certificate purchasing.

Information on the Dutch climate litigation case is available through Climate in the Courts, which tracks climate litigation globally. The site provides case summaries, legal analysis, and updates on similar cases in other jurisdictions.

UK businesses should also monitor updates from the Department for Business and Trade, which will publish further guidance as the January 2027 implementation date approaches. Importers of covered goods should subscribe to updates to ensure they do not miss compliance deadlines or changes to reporting requirements.