The Council of the EU and the European Parliament have provisionally agreed to raise the threshold for invalidating EU carbon allowances held in the Market Stability Reserve (MSR) to 700 million, according to Carbon Pulse. For buyers, investors and compliance managers in the EU ETS, the compromise keeps a larger pool of allowances available to stabilise the market while retaining a safeguard against oversupply.

What the Co-Legislators Agreed

The deal was reached on 21 October 2026, according to Eunews. It raises the threshold from 400 million to 700 million allowances. From 1 January 2031, allowances held in the reserve above that level will be invalidated.

Under the rules currently in force, everything in the reserve above 400 million would have been invalidated. Under the agreement, allowances between the two thresholds will not be cancelled. They stay in the reserve to help address imbalances between supply and demand.

The co-legislators also agreed that the cap should be gradually lowered on an annual basis, to ensure a consistent overall approach, according to Eunews.

A Compromise on the Commission’s Proposal

The agreement amends the European Commission’s initial proposal. The Commission had suggested suspending the invalidation mechanism immediately and indefinitely. That would have allowed an unlimited number of additional allowances to remain in the reserve as a buffer.

Parliament and Council chose a middle path. The threshold should keep what the text calls a sufficiently large reserve to absorb imbalances, while avoiding the excessive accumulation of allowances that the Commission’s approach might have produced.

Why the Council Says It Matters

The Council states that the agreement strengthens the MSR’s ability to respond to changing market conditions. That includes a potential contraction in supply after the mid-2030s, as the overall emissions cap continues to decrease. The updated rules allow the release of allowances where necessary, which the Council presents as protection for European industry against extreme price volatility.

At the same time, the Council says the safeguards send a clear signal against an oversupply of allowances. The stated aims are the orderly functioning of the carbon market and the MSR, greater long-term predictability and alignment with the EU climate targets for 2040 and 2050.

Political Reactions

Pierfrancesco Maran, the Parliament’s rapporteur and Chair of the Environment Committee, said the agreement shows that climate ambition and industrial competitiveness can and must go hand in hand. Darragh O’Brien, Ireland’s Minister for Climate, Energy and the Environment, whose country holds the rotating Council presidency, called it a balanced outcome. He said it gives industry immediate flexibility while ensuring price stability and protecting the integrity of the market.

How the Market Reacted

Price action was muted. EU carbon allowances edged higher for a second day, according to Carbon Pulse’s market report. An early surge to a five-day high was unwound within two hours and was followed by several hours of sideways trading. The report also notes that the co-legislators agreed a final decision on MSR changes to take effect as soon as the decisions are formally adopted.

The flat reaction suggests the outcome was largely anticipated, or that traders see the real effects as lying years ahead, since the invalidation date is 2031. The source material does not offer an explanation, so this is an interpretation rather than a reported finding.

Implications for Buyers and Investors

For compliance buyers, a higher threshold means fewer allowances are permanently removed from the system in the early 2030s than under current rules. That bears on long-term supply expectations, although the material does not quantify the effect on prices.

For investors, the reserve gains room to release allowances if supply tightens after the mid-2030s. That can dampen price spikes, but it can also limit the scarcity effect of a falling cap. The balance depends on how the reserve is used, which the agreement leaves to the mechanism’s operation.

For voluntary market participants who watch EU ETS prices as a reference for carbon pricing, the decision is a signal on how policymakers weigh price stability against scarcity.

What to Watch

  • Formal approval of the agreement by the European Parliament and the Council, the next step according to Eunews.
  • The timing of entry into force, which Carbon Pulse says follows formal adoption.
  • The detail of the annual lowering of the cap, which the material describes only in general terms.
  • How allowance prices behave once the formal votes are complete.

The provisional deal is not yet law. Until both institutions confirm it, the 700 million threshold remains an agreement in principle rather than a rule.