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Reino Unido confirma el 28 de diciembre que introducirá el MAFC-CBAM en 2027

After careful review and giving thorough consideration to the potential implications, the government has today published a summary of responses and government response to the consultation and confirms that:

  • The government will implement a UK CBAM by 2027.

  • The liability applied by the CBAM will depend on the greenhouse gas emissions intensity of the imported good and the gap between the carbon price applied in the country of origin (if any) and the carbon price that would have been applied had the good been produced in the UK.

  • CBAM liability will lie directly with the importer of imported products within scope of the UK CBAM on the basis of emissions embodied in imported goods. This system will not involve the purchase or trading of emissions certificates.

  • Further details on the design and delivery of a UK CBAM will be subject to consultation in 2024.

The UK CBAM will place a carbon price on some of the most emissions intensive industrial goods imported to the UK from the aluminium, cement, ceramics, fertiliser, glass, hydrogen, iron and steel sectors.

Further detail, including the precise list of products in scope, will be the subject of consultation in 2024.

What are the emissions scope categories, and which will apply for a UK CBAM?
  • Scope 1 emissions relate to direct activities owned or controlled by an organisation. These emissions are directly controlled by those producing the product, for example as part of a manufacturing process or when fuels are combusted onsite.

  • Scope 2 emissions relate to an organisation’s consumption of purchased electricity, heat, steam and cooling. Scope 2 represents indirect emissions which are not directly controlled by manufacturers of a product.

  • Scope 3 relates to other emissions released as a consequence of an organisation’s actions that occur at sources not owned or controlled by the organisation. Scope 3 represents indirect emissions created upstream or downstream, for example, the transportation by air of finished products by subsequent entities, or the production of precursor goods from another manufacturer in the supply chain.

  • The UK CBAM will be applied to Scope 1, Scope 2 and select precursor product emissions embodied in imported products to ensure comparable coverage with the UK Emissions Trading Scheme.

Explaining explicit and effective carbon price

  • An explicit carbon price puts a £/tCO2e directly on greenhouse gas emissions produced during a given process, such as manufacturing. These usually take the form of either an emissions trading scheme with a market-based price or a carbon tax with a fixed price.

  • The effective carbon price is the price paid by producers after accounting for the impact of free allowances and other support mechanisms.

  • The UK CBAM will apply an effective carbon price to imports, which will be significantly lower than the headline explicit UK ETS price, to reflect domestic free allowances.

Carbon pricing internationally

  • The UK CBAM is designed so that other countries which also have an explicit carbon price will see the CBAM liability on their goods adjusted accordingly.

  • The price applied by a CBAM will therefore be set on the basis of the explicit carbon price differential between the UK and the country where the products were produced.

  • The government will consult in more detail on the criteria for carbon prices elsewhere in the world to be recognised by the UK CBAM.

Interaction with UK Emissions Trading Scheme (UK ETS)

  • The UK ETS places a price on greenhouse gases emitted by domestic producers. The UK ETS works on a cap-and-trade system in which the market determines the price of allowances. Total carbon emissions and allowances under the scheme are capped, reducing over time to incentivise decarbonisation.

  • Currently, to mitigate the carbon leakage risk for sectors covered by the UK ETS, a proportion of UK ETS allowances (UKAs) are assigned to operators in exposed sectors for free. This reduces exposure to the carbon price for operators receiving free allowances, while preserving the economic incentive for decarbonisation and the emissions cap across the ETS sectors.

  • To put the UK ETS on a net zero consistent trajectory, in July this year the UK ETSAuthority announced that ETS allowances available for purchase from government would reduce by 45% between 2023 and 2027, in line with the UK’s net zero ambitions.

  • The UK ETS Authority committed to maintain current levels of free allocation for industrial sectors until 2026.

  • The UK ETS Authority launched two consultations on 18 December 2023 on proposed changes to the UK ETS that will ensure it continues to support progress to net zero across the UK. The Review of Free Allocation explores how to better target free allowances for industries most at risk of carbon leakage.

  • The UK CBAM will work cohesively with the UK ETS, including free allowances, to ensure imported products are subject to a carbon price comparable to that incurred by UK production, mitigating the risk of carbon leakage.


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