EU CBAM in 2026: What UK Manufacturers Need to Know
The European Union’s Carbon Border Adjustment Mechanism (CBAM) is now one of the most significant regulatory challenges facing UK manufacturers and engineering businesses that export to or source materials from the EU. With the definitive financial phase live since 1 January 2026, UK businesses working in steel, aluminium, cement, fertilisers and related materials face real cost and real risk if they are not prepared.
This guide explains exactly what CBAM is, which UK businesses are affected, what the 2026 obligations mean in practice, and how Coler Supply Solutions can help you turn compliance into a competitive advantage.
What is the EU Carbon Border Adjustment Mechanism (CBAM)?
The EU Carbon Border Adjustment Mechanism is a carbon pricing policy introduced by the European Union to prevent carbon leakage, the practice of relocating carbon intensive production to countries with weaker climate regulations to avoid costs under the EU Emissions Trading System (EU ETS).
Under CBAM, importers bringing certain goods into the EU must declare and pay for the embedded greenhouse gas emissions in those goods, at a price equivalent to what EU manufacturers already pay under the EU ETS. This levels the playing field between EU based producers and international competitors.
Key fact: CBAM does not apply to UK businesses selling domestically. It applies when goods covered by CBAM are imported into the EU. If your supply chain involves exporting to EU customers or sourcing CBAM covered materials, you are in scope. The full legal basis sits in EU Regulation 2023/956.
CBAM Timeline: Transitional Phase vs Definitive Phase
Phase 1: Transitional Period (October 2023 to December 2025)
During the transitional period, EU importers of CBAM goods were required to report the embedded emissions of imported goods quarterly. No financial payments were required at this stage. The data collected forms the foundation for the certificate obligations that began in 2026.
Action required now: UK businesses supplying EU customers with CBAM covered goods should already be calculating and providing embedded emissions data to those customers. If you have not begun this process, you are behind your competitors.
Phase 2: Definitive Period (from 1 January 2026)
Since 1 January 2026, authorised EU importers must account for and surrender CBAM certificates covering the CO₂e embedded in imported CBAM goods. The certificate price is linked to the weekly average auction price of EU ETS allowances.
Three practical dates matter for anyone supplying an EU customer:
- 1 January 2026: the obligation applies to goods imported from this date onward.
- February 2027: CBAM certificates go on sale through the central platform in the CBAM Registry.
- 30 September 2027: the first annual CBAM declaration, covering 2026 imports, falls due.
A 50 tonne annual mass threshold now exempts small importers of cement, iron and steel, fertilisers and aluminium. It does not apply to hydrogen or electricity. If your EU customer imports above that volume, and most industrial buyers do, your emissions data is part of their compliance file.
How Much Does CBAM Actually Cost in 2026?
This is where most commentary gets it wrong. CBAM phases in as EU ETS free allowances phase out, so 2026 is not a full cost year.
| Year | Share of embedded emissions requiring certificates |
|---|---|
| 2026 | 2.5% |
| 2027 | 5% |
| 2028 | 10% |
| 2030 | 48.5% |
| 2034 | 100% |
Applying that to a real example. The EU ETS price has been running around €73 per tonne of CO₂e. A UK steel supplier shipping goods carrying 10,000 tonnes of embedded emissions into an EU customer creates a theoretical full liability of roughly €734,000. In 2026 that customer pays about €18,400. By 2030 it is roughly €356,000. By 2034 it is the full €734,000.
Read this correctly. The 2026 bill is small. The 2026 data requirement is not. Your EU customers are building supplier scorecards now, on this year’s numbers, ahead of a cost that multiplies nearly fortyfold by 2034. Suppliers who cannot produce verified emissions data in 2026 will be designed out of supply chains long before the cost peaks.
Which UK Businesses Are Affected by CBAM?
CBAM covers six sectors defined by specific Combined Nomenclature (CN) codes. UK manufacturers and engineering firms operating in these areas are most directly impacted.
- Iron and Steel (CN Chapters 72 and 73): the most heavily affected sector. Includes raw materials, semi finished products, structural steel, tubes and fabricated components.
- Aluminium (CN Chapter 76): primary aluminium, alloys and cast components, semi finished articles and finished aluminium goods used across engineering and construction.
- Cement (CN Chapter 25): a key construction input. UK cement exporters to EU markets face significant exposure.
- Fertilisers (CN Chapter 31): ammonia based fertilisers and nitrogen compounds are in scope, affecting agricultural supply chains.
- Electricity (CN Code 2716): cross border electricity imports into the EU are covered.
- Hydrogen (CN Code 2804.10): increasingly relevant as decarbonisation investment grows across the EU and UK.
If your products fall under these CN codes, or your supply chain includes raw materials or components that do, CBAM compliance is not optional. It affects your pricing, your contracts and your market access.
Is the UK Exempt Because of the ETS Linking Agreement?
Not yet, and this is the most common misconception in UK boardrooms right now.
The UK and EU have agreed in principle to link their emissions trading systems, which would eventually remove UK goods from EU CBAM scope. That linkage is not operational, and the EU has declined to grant the UK interim relief in the meantime. Industry estimates put the cost to UK exporters at several hundred million pounds a year until linkage lands.
Layered on top, the UK introduces its own CBAM on 1 January 2027, covering imports into the UK across a similar sector list. UK manufacturers that import CBAM materials for processing and re export will be managing obligations on both sides of the border.
Plan for exposure, not exemption. If linkage arrives early, you have gained a decarbonisation dataset your customers value anyway.
The Financial Impact of CBAM on UK Supply Chains
For UK manufacturers, the impact arrives in four ways.
- Certificate costs passed back through the supply chain. EU importers factor CBAM costs into purchasing decisions, putting price pressure on UK suppliers with high embedded emissions. This is the same pass through dynamic UK exporters saw with import tariffs, and it lands on the same margin.
- Competitive disadvantage against low carbon producers. Suppliers who can evidence low embedded emissions carry lower CBAM cost, which makes them more attractive to EU buyers.
- Data quality penalties. Where verified emissions data is unavailable, importers must use European Commission default values, which are deliberately conservative and higher than most real world figures. Poor data directly inflates your customer’s bill.
- Procurement strategy shifts. UK businesses sourcing CBAM materials for re export to the EU must recalculate landed cost to account for certificate obligations on both legs.
Strategic insight: businesses that measure and reduce embedded emissions now will hold a structural cost advantage by 2030. CBAM rewards decarbonisation, and it compounds. Those who act early pay less every year.
Why CBAM Is a Strategic Opportunity, Not Just a Compliance Burden
A level playing field for UK manufacturers
CBAM prevents unfair competition from producers in countries with no carbon pricing. For UK businesses that have already invested in cleaner production, CBAM converts that investment into a price advantage in the EU market.
A driver of supply chain decarbonisation
CBAM creates direct financial incentives to cut emissions across the whole supply chain, not just at your factory gate. UK engineering businesses can use it as the business case for sustainability investment and tighter supplier engagement.
Stronger sustainability credentials
Demonstrating CBAM readiness and low embedded emissions is increasingly a procurement requirement for large EU buyers. Businesses with robust measurement and reporting become preferred suppliers rather than commodity ones.
Greater supply chain transparency
CBAM’s data requirements force real visibility into Scope 3 emissions across complex, multi tier supply chains. That transparency also serves wider ESG reporting obligations, including the EU Corporate Sustainability Reporting Directive (CSRD).
How Coler Supply Solutions Delivers CBAM Readiness for UK Manufacturers
Coler Supply Solutions provides complete CBAM support built for UK manufacturing and engineering businesses. The approach goes beyond box ticking. We help you build the systems, data and strategy that make CBAM work in your favour.
CBAM readiness assessment and compliance roadmap
We start with a full audit of your supply chain to identify exactly where your exposure sits. We map your products against the relevant CN codes, quantify your embedded emissions liability across the phase in schedule, and build a prioritised action plan so you know precisely what to do and when.
Embedded emissions data collection and management
Accurate, verifiable data is the foundation of everything else. We deploy proven methodologies to collect granular emissions data from your supply chain, structure it to meet EU reporting standards, and maintain a data trail that stands up to audit.
Reporting and declaration support
Our compliance tools and team support both EU importers and UK suppliers in producing accurate CBAM declarations that meet the requirements of EU Regulation 2023/956 and its implementing acts, reducing exposure to penalties and supply chain disputes.
Ongoing regulatory monitoring and strategic advice
CBAM legislation continues to move. Coler Supply Solutions tracks developments across CN code scope, certificate pricing, the UK CBAM launch and ETS linkage, and provides timely guidance to keep your compliance framework current. You can review our existing quality standards and certifications to see how we manage evidence and documentation across client programmes.