EU and UK Near Deal to Link Carbon Trading Systems

What negotiators have agreed and what remains

Talks are in the home stretch to connect the EU and UK emissions markets, a move designed to deepen liquidity and simplify compliance for companies active on both sides. People familiar with the discussions say the big pieces are agreed: emissions caps, supply controls, and how free allowances are handled.

Once connected, permits from either system would be accepted for compliance in the other, which is particularly useful for firms with operations across Europe. The EU is set to recognize the UK's cap for 2028 through 2030, according to those people, and from 2031 the UK's annual issuance would be limited to 7.1% of the volume scheduled under the EU ETS.

The UK plans to set up a Market Stability Reserve of its own - the same type of supply buffer the EU has long employed - to control excess permits. That reserve will launch with no fewer than 29.5 million allowances when the agreement takes effect. A decision will be made ahead of 2030 on any changes needed so the UK reserve equals at least 6.7% of the EU ETS reserve's holdings in 2029.

One technical detail is still open: how to handle financial derivatives tied to carbon permits.

Timing, approvals and related summit deliverables

Leaders are aiming to roll out the linkage at a Nov. 20 summit, where matching tuition for students studying across the Channel is also slated as a headline deliverable. As Bloomberg noted last month, the package also aims to blunt the effect of trade measures on sensitive areas such as steel and electric vehicles, alongside plans for tighter joint efforts against cyber threats.

The deal still needs approval on both sides, involving the European Parliament and EU member states in the Council. Implementation would begin one month after the last notification linked to two additional summit deliverables - a sanitary and phytosanitary (SPS) standards deal and an agreed fix for a youth mobility scheme called YES. The parties could also choose to apply the arrangement on a provisional basis before formal entry into force.

The European Commission declined to comment, consistent with its practice of not discussing draft documents.

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How the link interacts with border levies and pricing

Connecting the markets would not grant either side an automatic exemption from their Carbon Border Adjustment Mechanisms. Instead, it sets the stage for a waiver once conditions in each side's domestic laws are met, according to people familiar with the plan.

To issue that waiver, EU law mandates two conditions: complete linkage with the EU ETS, plus robust carbon pricing that does not include preferential rebates. After those conditions are satisfied, the EU would place the UK on a list of countries outside the CBAM's scope via a delegated act.

The EU's carbon border system started operating this year, and the first compliance deadline is in September. The UK's regime is slated to begin at the start of 2027. Price signals already differ: on Friday, the UK December carbon contract settled at £64.81 per ton, with EU benchmark allowances at €86.55. Moutaz Altaghlibi, Senior Energy Economist at ABN Amro, said in a Nov. 5 note that the spread may shrink during the next two years as UK permits converge toward EU prices. He added, "Linking the systems should also improve liquidity, make carbon prices more consistent across Europe, and reduce CBAM-related costs and paperwork for trade between the UK and EU."

What this means for your portfolio

Created in 2005, the EU ETS gradually tightens caps on roughly 10,000 installations covering sectors such as steel, cement, fertilizers, electricity generation and aviation, so any movement in prices or supply can affect a broad array of listed companies.

The deal also aligns the UK's cap - with recognition for 2028 to 2030 and a tighter issuance rule from 2031 - and adds a UK Market Stability Reserve to manage supply. For investors, that points to a more integrated carbon price across Europe and potentially higher UK permit costs if prices converge, a dynamic flagged by ABN Amro.

The bottom line: if ratified and applied, linkage could trim CBAM-related paperwork and eventual tax exposure for cross border trade while making carbon prices more uniform. The last mile is formal approval and the other summit deliverables, with the option to apply the pact provisionally before it formally kicks in.

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