Category: Climate insurance · Reviewed by Chrissie Anderson, Client Executive · Last reviewed 2026-06-10
Transition risk insurance is the underwriting and capital response by UK insurers to financial losses arising from the shift to a lower-carbon economy — including policy and legal changes, technological substitution, market repricing and reputational damage — particularly where these affect D&O, professional indemnity, credit, surety and energy policies.
Category: Climate insurance Also known as: Climate transition risk cover; Net-zero transition insurance; Low-carbon transition cover Established / Date: Defined in TCFD Final Recommendations, June 2017 Related concepts: Physical climate risk insurance, Liability climate risk, Climate VaR
Transition risk is the second TCFD risk category and refers to the financial impact of the move to a lower-carbon economy.[1] TCFD subdivides it into policy and legal risk (carbon pricing, emissions regulation, litigation), technology risk (substitution by lower-emission products), market risk (changing consumer preferences and commodity prices) and reputational risk (sector stigma, customer flight).
Transition risk insurance does not exist as a discrete product. Instead, transition exposures are reflected across D&O, professional indemnity, environmental impairment liability, credit, political risk, surety, marine cargo and energy package policies. The principal market response is in wording (exclusions, sub-limits, definitions of “climate claim”), pricing (sector loadings, capacity restrictions for coal and oil sands) and capital (stress test inputs).
The Lloyd’s market and the wider London insurance sector phased restrictions on new thermal coal, oil sands and Arctic energy exploration underwriting from 1 January 2022, with full divestment from direct investments in those activities by 1 January 2030, as set out in the Lloyd’s first ESG Report (December 2020).
The PRA expects insurers to embed transition risk in their underwriting, investment and capital frameworks under SS 3/19 and the July 2020 “Dear CEO” letter.[2] The Bank of England’s CBES, results published 24 May 2022, modelled transition risk under three pathways — early action, late action and no additional action — using NGFS Phase II scenarios.[3]
Disclosure of transition plans and transition risk is required for premium and standard listed issuers under Listing Rule LR 9.8.6R(8) (introduced by FCA PS20/17 and extended by PS21/23) and for large companies and LLPs under SI 2022/31, which inserted s.414CB(A1) into the Companies Act 2006 for accounting periods beginning on or after 6 April 2022.[4] IFRS S2 requires disclosure of an entity’s climate-related transition plan and the assumptions underpinning it.
UK insurers express transition risk in three ways. First, in underwriting appetite: tightened capacity for thermal coal mining, oil sands extraction and certain Arctic operations, with positive appetite for offshore wind, hydrogen, carbon capture and battery storage. Second, in wording: D&O and PI policies increasingly contain bespoke definitions of climate-related claims, and some carriers exclude liabilities arising from greenwashing or transition plan failures unless specifically extended. Third, in investment: insurer balance sheets are stress tested against carbon-intensive holdings under the PRA Insurance Stress Test 2022 and successor exercises.
The London Market is a leading insurer of renewable energy and carbon-removal technology. Specialist mutuals and MGAs underwrite offshore wind construction and operation, hydrogen electrolyser performance warranties, and CCUS leakage liabilities. Credit insurance and surety markets back transition finance, including green bonds, sustainability-linked loans and contracts for difference projects.
For UK companies in carbon-intensive sectors, transition risk insurance manifests as harder D&O renewals, narrower professional indemnity wording for sustainability advisers, and credit appetite changes for transition-vulnerable buyers. For SMEs adopting low-carbon technology — heat pumps, EV fleets, solar PV, biomass — new product liability, performance warranty and business interruption considerations arise.
Brokers should expect insurers to ask for transition plans, scope 1-3 emissions data, capex pathways and stress test outputs at renewal. Listed insureds will be drawing this data from their s.414CB strategic report disclosure and IFRS S2 reporting in any event.
A FTSE 250 oil and gas services company faces a hardening D&O market in 2025 following a shareholder vote on its transition plan. Its broker negotiates renewed terms by presenting (a) the strategic report disclosure under s.414CB Companies Act 2006, (b) a TCFD scenario analysis under NGFS Net Zero 2050 and Delayed Transition pathways, and (c) a verified SBTi-validated near-term target. The renewal proceeds with a 12% premium uplift but no transition exclusion and full Side A capacity preserved.
This entry is part of the Apex Insurance Wiki. Last reviewed by Matt Bartlett on 2026-06-10. Next review: 2026-12-10.
Apex Insurance Brokers Limited. Authorised and regulated by the Financial Conduct Authority, FRN 724952. Registered in England and Wales, Companies House 07014570. This entry provides general information about UK insurance concepts and is not regulated advice. Consult your insurance broker on your specific position.
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