United Kingdom

Overall rating
Almost Sufficient
Policies & action
Almost Sufficient
< 2°C World
Domestic target
1.5°C Paris Agreement compatible
< 1.5°C World
Fair share target
< 3°C World
Cimate finance
Highly insufficient
Net zero target



Comprehensiveness evaluated as

Land use & forestry

impact on overall emissions is

Not assessed


We evaluate the net zero target as: “Average.”

The UK has enshrined the net zero target by 2050 in law by way of revising and amending the Climate Change Act 2008 in 2019. As this revision was done after the UK’s LTS was submitted, the net zero target does not feature in the LTS. The net zero target generally covers key elements but fails to meet best practice standards for some of them.

The UK was the first major economy to establish and pass a legally binding target of net zero emissions by 2050 in 2019 (UK Government, 2019c). The UK’s target covers all sectors and gases, and there is indication that even international aviation and shipping are set to be included in the target’s scope. The net zero target’s key strength is its periodic carbon budgets and associated intermediate targets: by means of five-year statutory carbon budgets, a clear timeline is provided that will facilitate the tracking of progress towards net zero.

Weaknesses include the fact that a separate target for carbon dioxide removal has not been provided, while statements indicating the inclusion of international aviation and shipping emissions and the intention not to use international credits to reach the target have not yet been formalised. While the Climate Change Committee (CCC) has provided a thorough analysis on how the UK can achieve net zero, it is not clear whether the UK government intends to use all of the CCC’s sector-specific recommendations, and many policy gaps remain.

If the government were to legislate its commitments to include international aviation and shipping emissions and not to utilise international emission credits, the UK’s net zero target rating would improve to “Acceptable”.

CAT analysis of net zero target

United Kingdom
Comprehensiveness of net zero target design
Target year: 2050
Emissions coverage

Target covers all GHG emissions

International aviation and shipping

Target covers both aviation and shipping

Reductions or removals outside of own borders

Relies on international offset credits or reserves right to use them to meet net zero

Legal Status

Net zero target in law

Separate reduction & removal targets

No separate emission reduction and removal targets

Review Process

Legally binding process to review the net zero target

Carbon dioxide removal

No transparent assumptions on carbon dioxide removals

Comprehensive planning

Some information on the anticipated pathway or measures for achieving net zero is available, but with limited detail.

Clarity on fairness of target

Some explanation on why the target is fair


  • Target year – The UK aims to reach net zero GHG emissions by 2050.
  • Emissions coverage – The target covers all GHG emissions and all sectors of the economy (excluding international bunkers).
  • International aviation and shipping – The Climate Change Act itself does not yet specify whether emissions from international aviation and shipping are included in the new 2050 target. However, the sixth carbon budget will count emissions from international aviation and shipping towards the UK’s emissions, and they will be formally included under section 30 of the Climate Change Act (Explanatory Memorandum to the Carbon Budget Order 2021, 2021). The UK Government has also indicated that this will be legislated upon recommendation from the Committee on Climate Change (UK Government, 2019a). Given the government’s official commitment to include these emissions in its sixth carbon budget and indication that the net zero target will be updated accordingly in future, we have given the UK an “advanced” rating for this indicator.
  • Reductions or removals outside of own borders – As per the text of the Climate Change Act, the UK reserves the right to use of international offset credits to meet its net zero target. In 2019, the Prime Minister’s office announced with the release of the new Climate Change Act legislation that the UK “will retain the ability to use international carbon credits […] to maximise the value of each pound spent on climate change mitigation” (UK Government, 2019b).

    However, around the same time, the then Secretary of State for Business, Energy and Industrial Strategy specifically stated, in an answer given to a question in parliament, that the government did not intend to use international credits to achieve its net zero target (UK Government, 2019a). Given the contradicting nature of official statements relating to this indicator, a “poor” rating has been assigned; however, this would be changed to positive upon an official commitment to rule out the use of international permits to achieve the net zero target.

Target architecture

  • Legal status – Initially, the UK set an overall emissions reduction of at least 80% by 2050 compared to 1990 levels. This original commitment was replaced with a net zero target for 2050 in 2019 and the UK passed its net zero target in law (UK Government, 2019e). The Sixth Carbon Budget will also reflect the new target. As the UK’s long-term strategy was submitted in 2017, before the Climate Change Act was revised to include the net zero target in 2019, the net zero target is not covered in the UK’s LTS (UK Government, 2017d).
  • Separate reduction & removal targets – The UK does not provide separate emissions reduction and removal targets, nor does it provide information on its intention to communicate separate emissions reduction and removal targets.
  • Review process – The UK has a legally binding process in place to review progress on achieving the net zero target (House of Commons Public Accounts Committee, 2021). The Secretary of State is obliged to provide an annual statement on UK emissions trends, as well as a statement on whether each successive carbon budget has been met. There is also a provision that allows for the amendment of the 2050 target if there have been significant developments in scientific knowledge about climate change or in international law or policy.


  • Carbon dioxide removal – The Climate Change Committee (CCC) report provides transparent assumptions for domestic LULUCF and carbon dioxide removals, but the UK government has not specified how closely it will follow these recommendations.
  • Comprehensive planning – Underlying analysis by the CCC identifies emissions pathways, highlights current policy commitments, and depicts necessary sector-specific key changes for reaching net zero (Committee on Climate Change, 2020b). At the same time, despite the sequential carbon budgets, many of the measures necessary for achieving net zero are not legally enshrined by the UK, and the CCC has identified several existing policy gaps.
  • Clarity on fairness of target – The CCC's advice includes an assessment of the implications of different equity principles. The report concludes that the UK would have to do more than the world as a whole for it to be considered ambitious and aligned fair share principles (Committee on Climate Change, 2020b). The report goes on to explain how the gap between their realistic net zero target and what would be a fair target could be addressed. However, the Climate Change Act itself does not reference fairness or equity in the context of its net zero target.

Good practice

The Climate Action Tracker has defined the following good practice for all ten key elements of net zero targets. Countries can refer to this good practice to design or enhance their net zero targets.

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