Major regulatory reviews and industry analyses indicate that insurers are still in the early stages of embedding climate transition risk into underwriting. Mark Carney, Bank of England, warned that financial actors can underestimate near-term policy, technology and market shifts that revalue assets and liabilities. The Network for Greening the Financial System NGFS provides scenario frameworks but highlights wide uncertainty about timing and intensity of transitions. That uncertainty makes consistent pricing challenging: models that rely on historical loss experience do not capture abrupt regulatory or market-driven repricing.
Model limitations and data gaps
Underwriting models traditionally focus on frequency and severity of insured perils; transition risk arises from policy changes, asset stranding and shifts in demand. Swiss Re Institute has documented changing exposures across carbon-intensive sectors, noting insurers face both claims and investment-channel losses. Munich Re research emphasizes the lack of granular, forward-looking data linking corporate transition pathways to insurance exposure. Without robust, comparable disclosures from corporates, insurers must rely on proxies or scenario judgments that reduce precision and comparability across portfolios.
Regulatory and market responses
Supervisors and industry bodies are advancing expectations. The Bank of England and NGFS promote stress tests and scenario analysis to force forward-looking assessment. Reinsurers and global brokers publish sectoral workstreams to translate transition scenarios into underwriting guidance. Nevertheless, many smaller or regional insurers, particularly in emerging markets with limited data and capital, lag in adopting these tools. This creates territorial disparities: developed-market players may accelerate repricing while others remain exposed to sudden competitive or regulatory shocks.
Insurers face trade-offs between model complexity, capital constraints and client relationships. Where transition pathways are plausible and well-mapped, underwriters begin to adjust terms, exclusions and pricing margins. Where pathways are opaque, firms may prefer conservative capital buffers or portfolio rebalancing rather than granular price signals. The consequence for policyholders and societies can include coverage gaps, higher premiums for carbon-intensive activities, or reduced capacity in regions where transition readiness is low.
Improving outcomes requires better corporate disclosure, harmonized scenarios and investment in analytical capacity. Evidence from central banks and industry research shows progress but not yet uniform or complete incorporation of transition risk into underwriting. As policy and markets move faster than models adapt, insurers that develop transparent, scenario-based pricing will better manage business, societal and environmental consequences.