The UK government has published new draft regulations detailing how embodied emissions in imported goods will be measured and verified under its Carbon Border Adjustment Mechanism, or CBAM. Set to launch in 2027, the policy would place a carbon price on imports of carbon-intensive products, closing the gap between domestic producers who already pay for their emissions and foreign competitors who may not.

Why it matters

Carbon border taxes are one of the most consequential climate policy tools being developed right now. They reshape trade incentives at a fundamental level. If your country prices carbon domestically but your trading partners don’t, your industries face a cost disadvantage and emissions simply shift overseas, a problem known as carbon leakage. A CBAM fixes that by charging importers for the carbon embedded in their goods. The EU already has one phasing in. The UK following suit signals that carbon border pricing is becoming a norm among major economies, not an outlier experiment.

For the CDR field specifically, CBAMs matter because they strengthen the broader carbon pricing architecture that makes permanent carbon removal economically relevant. The higher and more consistent the price on carbon, the more viable CDR becomes as a compliance or offsetting tool down the line.

The details

The UK’s CBAM will apply to imports of carbon-intensive goods, likely covering sectors like steel, cement, aluminum, fertilizers, and electricity, mirroring the scope of the EU’s version. The new draft regulations focus on the measurement, reporting, and verification (MRV) framework: how importers will need to calculate the carbon embedded in the products they bring into the UK, and how those calculations will be checked.

Getting MRV right is the hard part. Embodied emissions vary enormously depending on the energy mix, production process, and supply chain of the exporting country. A ton of steel from a plant powered by Swedish hydroelectricity has a very different carbon footprint than a ton from a coal-fired mill in another region. The draft rules aim to standardize how those differences are captured and reported.

The 2027 launch date gives businesses roughly two years to prepare. That timeline is tight but deliberate. The UK has been signaling this policy direction since at least 2023, and the draft regulations represent a shift from consultation to concrete rulemaking.

One key question is how the UK’s CBAM will interact with the EU’s. The EU’s Carbon Border Adjustment Mechanism entered its transitional phase in October 2023, with full financial obligations kicking in by 2026. If the two systems don’t align well, companies trading with both the UK and EU could face duplicative reporting burdens or, worse, double-counting of carbon costs. The draft rules may offer early signals on whether the UK intends to pursue mutual recognition with the EU system.

Implications for CDR

Carbon border taxes don’t directly fund carbon removal. But they do something arguably more important: they raise the floor price of carbon across entire economies. When imported goods carry a carbon cost, it becomes harder for any actor in the supply chain to treat emissions as free. That pricing signal ripples outward.

For CDR buyers and suppliers, a functioning CBAM means:

  • Stronger demand signals. Companies facing real carbon costs on both domestic production and imports have stronger incentives to invest in removal credits as part of their decarbonization strategies, particularly for residual emissions they genuinely cannot eliminate through process changes.
  • Better data infrastructure. The MRV systems built for CBAMs, tracking embodied emissions across international supply chains, create data pipelines that CDR verification can eventually plug into. The skills, standards, and institutions developed for border carbon accounting have direct parallels in carbon removal accounting.
  • Policy momentum. Every major economy that adopts a CBAM makes it harder for holdouts to resist. As carbon pricing spreads, the economic case for high-quality CDR strengthens in parallel.

It’s worth being explicit here: a carbon border tax is a tool for reducing emissions from industrial production. It is not a substitute for phasing out fossil fuels, and CDR is not a substitute for either. The correct framing is that CBAMs help price emissions correctly, CDR handles the genuinely hard-to-abate residual slice, and direct emissions cuts do the vast majority of the work.

Caveats

The draft regulations are just that: drafts. They will go through further consultation and revision before becoming law. The 2027 target is firm for now, but implementation timelines for complex trade policies have a habit of slipping, as the EU’s own CBAM rollout has shown.

We also don’t yet have full detail on the scope of goods covered, the default emissions values that will apply when actual data isn’t available, or the penalty structure for non-compliance. These details matter enormously. A CBAM with generous default values or weak enforcement is just a paperwork exercise.

There’s also the geopolitical dimension. Carbon border taxes are inherently contentious in trade negotiations. Developing countries have raised legitimate concerns about CBAMs acting as protectionist barriers rather than genuine climate tools. How the UK addresses these concerns, through revenue recycling, technical assistance, or exemptions for least-developed countries, will shape whether the policy builds international cooperation or resentment.

Finally, the interaction between the UK and EU systems remains unresolved. Businesses operating across both jurisdictions need clarity soon. Divergent rules would add cost and complexity without additional climate benefit.

The bottom line: the UK is moving from talk to regulation on carbon border pricing. That’s a meaningful step for climate policy broadly and, indirectly, for the economic conditions that make CDR viable. But the devil is in the draft details, and those details still have a long way to travel before 2027.

Source: Carbon Herald