The European Union is preparing a major expansion of carbon pricing with the introduction of the second emissions trading system, ETS2, covering buildings, road transport, and additional sectors from 2028.
To reduce market volatility risks and strengthen investor confidence, the European Parliament and Council have reached a provisional agreement to reinforce the Market Stability Reserve (MSR), the mechanism designed to manage allowance supply and prevent excessive price fluctuations.
The agreement comes as the EU attempts to balance two competing priorities: accelerating emissions reductions while avoiding economic disruption caused by rising energy costs and fossil fuel market instability. ETS2 is expected to play a significant role in the bloc’s pathway toward climate neutrality by 2050, but its expansion into consumer-facing sectors has raised concerns over affordability, political acceptance, and market stability.
Under the revised framework, the Market Stability Reserve will receive additional capabilities to respond to carbon price pressures after ETS2 begins operating. One of the main changes extends the validity of ETS2 allowances held in the reserve beyond 2030, allowing them to be released later if market conditions require additional supply. This adjustment is intended to improve long term predictability by ensuring that the reserve remains an active balancing mechanism beyond the initial years of the system.
The agreement also increases the reserve’s intervention capacity during periods of high carbon prices. If ETS2 prices exceed predefined thresholds, the number of allowances released from the reserve will be doubled compared with previous provisions. This aims to limit sharp price increases that could affect households and businesses exposed to fossil fuel costs in heating and transport.
A further change allows allowances to be released earlier and in a more gradual manner. Rather than relying only on reactive market interventions, the updated approach is designed to provide a smoother adjustment process by introducing additional supply before price pressures become more severe.
The design of ETS2 reflects a broader shift in EU climate policy from sector-specific regulation toward economy-wide carbon pricing. While the existing EU Emissions Trading System covers power generation, industrial facilities, and aviation, ETS2 extends carbon costs to fuel suppliers serving buildings and road transport. The system is intended to create an economic incentive for cleaner technologies while allowing market mechanisms to determine the most efficient emissions reductions.
However, extending carbon pricing into sectors directly affecting households introduces different challenges than those seen in industrial markets. Buildings and transport involve millions of individual consumers and small businesses, many of which cannot immediately switch away from fossil fuels without access to affordable alternatives. This has made social protections a central component of the ETS2 framework.
The Social Climate Fund is designed to address these concerns by directing financial support toward vulnerable households, transport users, and micro-enterprises. Funding is expected to support energy efficiency improvements, cleaner heating systems, and lower emission transport options. The effectiveness of the policy will depend on whether these funds are deployed quickly enough to reduce exposure before carbon costs influence consumer prices.
The EU is also accelerating preparations before ETS2 becomes fully operational. Early ETS2 auctions are planned to begin in 2027, allowing revenues to become available earlier while providing markets with an initial carbon price signal. In addition, the European Commission and the European Investment Bank have established an ETS2 Frontloading Facility that will make up to €3 billion available to Member States during 2026 and 2027 to support early transition investments.
The revised MSR framework highlights a key challenge in carbon market design: maintaining environmental ambition while preventing excessive volatility. Carbon pricing systems depend on credibility, but abrupt price movements can weaken political support and create uncertainty for companies planning long term investments in clean technologies.
For businesses, the strengthened ETS2 safeguards could improve visibility around future carbon costs, potentially influencing investment decisions in building efficiency, electrification, renewable heating, and low emission transport infrastructure. However, market stability mechanisms cannot replace the need for broader policy coordination, including grid investment, clean energy deployment, and industrial competitiveness measures.
The provisional agreement still requires formal adoption by the European Parliament and Council before entering into force. Once approved, the updated Market Stability Reserve rules will become part of the regulatory framework governing ETS2 implementation.
