Xeroc and Stuff4Life founder Dr Miles Watkins explores the potential impacts and benefits of pricing carbon at the border.
Within 12 months, carbon embedded in key materials will be priced at the UK border – in the EU, the same mechanism has just come into effect.
How will it work, why does it matter, and what does it mean for UK recyclers?
What is CBAM and why does it matter?
In essence, a Carbon Border Adjustment Mechanism (CBAM) is a carbon price applied at the border. It is designed to ensure that imported goods – particularly those from emissions-intensive sectors – bear a carbon cost comparable to products manufactured domestically under carbon pricing regimes.
The aim is to prevent ‘carbon leakage’, where production shifts to countries with weaker climate policies while domestic industries face rising regulatory costs. Whilst some may argue that this is ‘too little, too late’, others will argue that this is an essential measure to tackle climate change and the next step towards globally agreed carbon reduction targets.
In the UK, heavy industries, such as steel, cement and aluminium, already pay for their emissions under the UK Emissions Trading Scheme (UK ETS). Without a CBAM, overseas producers operating in regions with lower or no carbon pricing can undercut UK manufacturers simply because their emissions go unpriced.
CBAM corrects this imbalance by charging importers for the embedded carbon in goods unless an equivalent carbon cost has already been paid in the exporting country. The result is a fairer competitive landscape and stronger incentives globally to decarbonise production.
UK timeline and sector coverage
The UK government has confirmed that its CBAM will take effect on 1 January 2027. At launch, it will apply to imports in five high-emissions sectors:
- Aluminium
- Cement
- Fertiliser
- Hydrogen
- Iron and steel
These industries were selected because they are both carbon-intensive and highly exposed to international competition.
The EU moves first: CBAM in 2026
The European Union’s CBAM enters its full operational phase in 2026, one year ahead of the UK. This earlier implementation has immediate implications for UK exporters, who must already prepare to provide emissions data to EU customers.
As the EU market tightens carbon transparency requirements, UK firms without comparable domestic protections could face a double disadvantage: higher domestic carbon costs and tougher export conditions.
The UK’s 2027 rollout is therefore partly defensive: aligning trade policy with climate ambition to safeguard domestic industry.
How CBAM will function
Under the UK model, importers of covered goods must calculate the greenhouse-gas emissions embedded in those products.
A charge is levied reflecting the difference between the UK carbon price and any carbon price already paid overseas. Revenues reinforce the domestic decarbonisation signal and protect UK industry from high-carbon imports.
The key benefits for UK manufacturers include:
- A fair competitive environment: CBAM ensures imported cement, steel, and aluminium are not artificially cheaper simply because their carbon was unregulated.
- Stronger investment confidence: When border carbon costs mirror domestic ones, manufacturers gain certainty that low-carbon investments will not be undercut by cheaper high-emission alternatives.
- Accelerated innovation: CBAM rewards cleaner production and supports a shift toward recycled and lower-carbon inputs.
Case study: Xeroc and circular construction
Xeroc exemplifies how CBAM can strengthen circular innovation. The ‘concrete-as-a-service’ model dismantles end-of-life concrete and recovers cementitious fines that are then carbonated to permanently sequester CO₂.
The treated material becomes a supplementary binder that replaces a large portion of virgin cement (‘OPC’) in new concrete and is reused in new concrete, along with the other recovered aggregates.
As CBAM raises the effective cost of imported high-carbon cement, low-carbon secondary binders gain competitive value. Xeroc’s approach therefore aligns perfectly with the policy’s intent: lowering emissions, reducing reliance on virgin extraction and enabling UK producers to offer greener concrete to domestic and EU markets alike.
Future CBAM expansion and polymers
While polymers and their monomers are not included in the first wave of CBAM, they are widely expected to feature in later expansions, particularly in the EU from the late 2020s onward.
Plastics share many characteristics with CBAM-covered materials: they are energy-intensive, fossil-based, globally traded and already regulated under the EU Emissions Trading System.
Virgin polymer production – PET, polyethylene, polypropylene and others – carries a significant carbon footprint, largely from steam cracking and petrochemical feedstocks. That makes the sector highly exposed to carbon leakage and a natural candidate for border carbon pricing.
The EU has already signalled that its CBAM will broaden to additional ETS-covered sectors after the initial 2026 launch. Chemicals and polymers are consistently highlighted in policy discussions as part of this second phase, with a likely review period between 2026 and 2028 and potential inclusion around 2028-2030.
Once polymers are covered upstream, downstream plastic goods – from packaging to synthetic fibres – would indirectly inherit carbon cost exposure.
For recyclers and circular-economy innovators like Stuff4Life, this could be transformative. Recycled or chemically recovered monomers produced in the UK or EU would gain a major price and carbon advantage over fossil-based imports.
Companies creating high-purity secondary feedstocks could compete directly with virgin petrochemicals in a CBAM-protected market.
If the EU moves first, the UK would likely follow post-2030 to avoid disadvantaging its own plastics and recycling sectors. CBAM may therefore evolve into a powerful driver not just for industrial decarbonisation, but for a truly circular polymer economy.
Conclusion
The UK CBAM represents more than a border tax; it is a structural shift in how carbon is accounted for in trade.
For manufacturers, it offers fairness and protection. For innovators like Xeroc – and for future circular monomer and polymer producers, like Stuff4Life – it creates a growing market premium for materials that cut emissions, lock away carbon and keep industrial value within the UK and aligned export markets.
