Deep dive: Insurance & risk transfer — what's working, what's not, and what's next

Global insured losses from natural catastrophes reached $145 billion in 2024, the fourth consecutive year above $100 billion, according to Swiss Re's sigma report. Yet only 42% of total economic losses from climate-related events were covered by insurance, leaving a protection gap of approximately $200 billion in a single year (Swiss Re, 2025). For sustainability leads navigating the intersection of climate risk and financial resilience, the insurance and risk transfer landscape is undergoing its most significant structural transformation in decades: pricing models are being rebuilt around forward-looking climate scenarios, parametric products are replacing traditional indemnity structures, and entire geographies are falling out of the insurable market altogether.

Why It Matters

The EU faces an acute version of this global challenge. The European Insurance and Occupational Pensions Authority (EIOPA) reported in 2025 that only 25% of climate-related economic losses in Europe were insured, compared to roughly 60% in North America (EIOPA, 2025). Southern and Eastern Europe are particularly exposed: Greece, Romania, and Bulgaria have insurance penetration rates below 5% for flood and wildfire risks. As the European Green Deal and CSRD reporting requirements push companies to quantify and disclose physical climate risks, the gap between risk exposure and available coverage is becoming a board-level governance issue rather than a procurement afterthought.

The financial stakes extend well beyond premium costs. When insurance retreats from a market, property values decline, lending dries up, and economic activity contracts. A 2025 analysis by the European Central Bank estimated that a 10% reduction in insurance availability across climate-exposed EU regions would reduce property values by 8 to 15% and increase sovereign fiscal exposure by EUR 12 to 18 billion annually as governments become insurers of last resort (ECB, 2025). For corporations, uninsured climate losses flow directly to the balance sheet, creating earnings volatility that credit rating agencies increasingly penalize.

The insurance industry itself is recalibrating. Munich Re's 2025 Global Risk Assessment noted that the compound annual growth rate of insured natural catastrophe losses has been 7.2% since 2015, roughly triple the rate of premium growth over the same period (Munich Re, 2025). This unsustainable divergence is forcing a fundamental rethinking of how climate risk is priced, distributed, and transferred across the global economy.

Key Concepts

Understanding the current insurance and risk transfer landscape requires familiarity with several foundational concepts that have evolved significantly in recent years.

Parametric insurance triggers payouts based on predefined physical parameters (such as wind speed exceeding 150 km/h or rainfall exceeding 200 mm in 24 hours at a specific weather station) rather than assessed losses. This eliminates the claims adjustment process, enables payouts within days rather than months, and allows coverage of risks that traditional indemnity products cannot price efficiently. The parametric market grew 28% year-over-year to reach $18 billion in gross written premium in 2024 (Artemis, 2025).

Insurance-linked securities (ILS) transfer catastrophe risk from insurers and reinsurers to capital market investors through instruments such as catastrophe bonds (cat bonds), collateralized reinsurance, and industry loss warranties. The ILS market reached $107 billion in outstanding capacity in 2024, providing critical additional capital to absorb peak catastrophe losses that would otherwise exceed the insurance industry's balance sheet capacity (Artemis, 2025).

Climate risk stress testing applies forward-looking climate scenarios to insurance portfolios to assess solvency under warming pathways of 1.5, 2.0, and 3.0+ degrees Celsius. EIOPA's 2024 climate stress test required all major EU insurers to model portfolio impacts under both transition and physical risk scenarios through 2050, revealing that several insurers faced capital adequacy concerns under high-warming pathways.

Protection gap measures the difference between total economic losses from catastrophic events and the portion covered by insurance. Closing this gap has become a central policy objective for regulators, development finance institutions, and the insurance industry itself, with the United Nations Development Programme targeting a 50% reduction in the global protection gap by 2030.

What's Working

Parametric Products for Speed and Scalability

Parametric insurance has demonstrated clear advantages in markets where traditional indemnity insurance has failed. The African Risk Capacity (ARC) Group, a specialized agency of the African Union, has deployed sovereign parametric drought insurance across 35 member states since 2014. In 2024, ARC processed payouts totaling $82 million to seven countries within 14 days of trigger events, enabling governments to fund emergency food distribution before humanitarian crises escalated (ARC, 2025). Compared to traditional disaster response funding, which takes an average of 5 to 6 months to deploy, the speed differential translates directly into reduced mortality and displacement.

In the corporate sector, Zurich Insurance Group launched a parametric business interruption product in 2024 specifically for EU manufacturers exposed to supply chain disruptions from extreme weather events. The product uses satellite-derived flood extent data and wind speed measurements to trigger payouts within 72 hours, bypassing the 6 to 12 month claims adjustment cycle typical of traditional business interruption policies. Early adoption has been concentrated among automotive and pharmaceutical manufacturers with just-in-time supply chains where production losses of EUR 500,000 to EUR 2 million per day make rapid payout essential.

Catastrophe Bonds Setting Records

The cat bond market issued $17.7 billion in new bonds during 2024, a record year driven by investor demand for uncorrelated returns and sponsor demand for multi-year guaranteed capacity. Cat bond spreads compressed from 8.5% in early 2023 to 5.8% by late 2024, reflecting improved risk-return profiles as models incorporated better data on climate-driven loss frequency (Artemis, 2025). For sponsors (typically reinsurers and large primary insurers), cat bonds provide multi-year capacity commitments that eliminate the annual renewal uncertainty inherent in traditional reinsurance.

The World Bank's Global Shield Financing Facility, launched at COP28 and expanded in 2025, has used cat bond structures to extend pre-arranged climate disaster financing to 58 vulnerable nations. The facility's V20 bond, covering volcanic eruption and tropical cyclone risk for 20 Pacific Island states, achieved pricing 15% below traditional reinsurance benchmarks by pooling diversified risks across geographies.

Data-Driven Underwriting Improvements

Advances in climate modeling and geospatial analytics are enabling more granular risk assessment. Jupiter Intelligence, a climate risk analytics firm, provides property-level physical risk scores used by 14 of the top 20 global reinsurers for portfolio management and pricing. The company's models incorporate downscaled climate projections, local infrastructure data, and historical loss records to differentiate risk at resolutions as fine as 90 meters. This granularity allows underwriters to maintain coverage in areas where portfolio-level withdrawal would otherwise occur, by pricing individual properties based on their specific exposure rather than broad geographic averages.

What's Not Working

The Retreat from High-Risk Markets

Despite innovations, the insurance industry is pulling back from the markets that most need coverage. In the US, State Farm and Allstate ceased writing new homeowners' policies in California in 2023, while Citizens Property Insurance Corporation (Florida's insurer of last resort) grew to 1.4 million policies by mid-2024, making it the state's largest property insurer. The pattern is repeating across Southern Europe: Greek and Italian property insurers have doubled wildfire and flood exclusion clauses since 2020.

The retreat creates a negative feedback loop. As private insurers withdraw, government-backed residual market mechanisms absorb the risk, but these entities typically lack the capital reserves and actuarial sophistication to price risk accurately. Underpriced government insurance subsidizes continued development in high-risk areas, increasing future loss potential. EIOPA's 2025 review identified EUR 340 billion in EU property assets located in areas where private insurance availability had declined by more than 30% in five years, with the majority concentrated in wildfire-prone Mediterranean regions and flood-exposed river valleys in Central Europe (EIOPA, 2025).

Model Uncertainty and Basis Risk

Climate models are improving but remain imperfect, and the gap between modeled and actual losses creates challenges for both traditional and parametric products. Basis risk, the difference between a parametric trigger payout and actual losses experienced by the policyholder, continues to limit adoption. A 2024 survey by the Insurance Development Forum found that 38% of organizations that evaluated parametric insurance declined to purchase it due to concerns about basis risk, particularly for events where localized conditions diverged from regional measurements (IDF, 2025).

Hurricane Otis, which struck Acapulco, Mexico in October 2023 after rapid intensification from a Category 1 to Category 5 storm in 12 hours, exposed model limitations: none of the major catastrophe models had assigned meaningful probability to such rapid intensification at that latitude. Insured losses of $5 billion exceeded modeled expected losses by a factor of three, triggering reserve strengthening across the reinsurance sector and raising fundamental questions about whether historical calibration remains valid in a rapidly changing climate.

Slow Adoption of Forward-Looking Scenarios

Despite regulatory pressure, most insurance pricing still relies heavily on backward-looking loss data rather than forward-looking climate projections. Munich Re's 2025 assessment found that only 23% of primary insurers in the EU had fully integrated climate scenario analysis into their underwriting and pricing processes, with the remainder still using historical loss experience as the primary rating basis (Munich Re, 2025). This creates systematic underpricing of emerging risks (such as convective storm intensification in Central Europe) and overpricing of risks where adaptation measures have reduced exposure.

Key Players

Established

Swiss Re: The world's second-largest reinsurer, with $42 billion in gross premiums written. Operates the Swiss Re Institute, which publishes the industry-standard sigma natural catastrophe loss database. Pioneer in climate risk scenario modeling and ILS structuring.

Munich Re: The world's largest reinsurer, with $67 billion in gross premiums written. Its NatCatSERVICE database is the most comprehensive global natural catastrophe loss record. Leads industry engagement on climate risk pricing through its Climate Change Solutions unit.

Lloyd's of London: The world's largest specialty insurance and reinsurance market, with GBP 52 billion in gross written premiums across its syndicates. Published the first mandatory climate scenario analysis requirements for syndicates in 2022 and has integrated physical and transition risk assessments into its market oversight framework.

Startups and Innovators

Descartes Underwriting: Paris-based parametric insurance MGA using satellite data and AI-driven climate models to underwrite natural catastrophe risks. Raised EUR 120 million in Series B funding in 2024 and covers over 1,000 corporate clients across 50 countries.

FloodFlash: London-based parametric flood insurance provider using IoT water depth sensors to trigger instant payouts. Processes claims within hours of flooding events and has expanded coverage to 15 European markets since 2023.

Jupiter Intelligence: San Jose-based climate risk analytics platform providing property-level physical risk scores to insurers, banks, and asset managers. Used by 14 of the top 20 global reinsurers for portfolio climate risk assessment.

Investors and Institutions

World Bank Global Shield Financing Facility: Multilateral facility providing pre-arranged climate disaster financing to vulnerable nations through parametric insurance and cat bond structures.

Insurance Development Forum (IDF): Public-private partnership co-chaired by the UN, World Bank, and insurance industry CEOs, focused on closing the global protection gap through innovation, regulation, and capacity building.

Metric	2020	2022	2024	Trend
Global insured nat cat losses (USD bn)	$82	$125	$145	Rising 7.2% CAGR
Parametric insurance market (USD bn)	$8	$12	$18	28% YoY growth
Cat bond outstanding capacity (USD bn)	$44	$72	$107	Record issuance
EU climate protection gap (%)	72%	73%	75%	Widening
ILS market investors (count)	280	350	420	Growing
Forward-looking pricing adoption (EU)	8%	14%	23%	Slow improvement

Action Checklist

• Conduct a climate risk exposure audit across all facilities, supply chains, and asset portfolios using property-level physical risk data rather than regional averages
• Evaluate parametric insurance options for critical exposures where payout speed matters more than precise loss matching, particularly business interruption and supply chain disruption
• Review existing policy exclusion clauses for climate-related perils, noting where coverage has narrowed or pricing has increased by more than 25% year-over-year
• Integrate climate risk stress testing into enterprise risk management using EIOPA-aligned scenarios at minimum (RCP 4.5 and RCP 8.5 pathways)
• Engage with industry groups (IDF, Geneva Association, ClimateWise) to inform regulatory development and access emerging risk transfer solutions
• Assess the feasibility of captive insurance structures for climate risks where commercial market capacity is contracting or pricing is prohibitive
• Ensure CSRD and TCFD physical risk disclosures are consistent with actual insurance coverage positions to avoid disclosure gaps that attract regulatory scrutiny
• Establish pre-event financing arrangements (standby credit facilities, parametric triggers) to maintain liquidity during uninsured or underinsured loss events

FAQ

Q: How do I determine whether parametric or traditional indemnity insurance is more appropriate for a specific climate risk? A: Parametric insurance is preferable when three conditions are met: the peril can be measured by an objective, transparent index (such as wind speed, rainfall, or earthquake magnitude); the correlation between the index and actual losses is strong (basis risk is low); and payout speed is critical to business continuity. Traditional indemnity coverage remains superior for complex risks where losses are difficult to correlate with a single physical parameter, such as gradual subsidence, multi-peril events, or liability exposures. Many organizations are adopting blended structures where a parametric layer provides immediate liquidity and a traditional indemnity layer covers the residual loss.

Q: What is the current state of climate risk disclosure requirements for insurance buyers in the EU? A: Under the CSRD, which applies to approximately 50,000 EU companies from reporting year 2024 onward, organizations must disclose material physical and transition climate risks, including the extent to which those risks are mitigated by insurance or other risk transfer mechanisms. ESRS E1 (Climate Change) requires disclosure of financial effects from physical risks, adaptation actions taken, and residual risk after mitigation. Companies that hold significant insurance coverage for climate risks must reconcile disclosed risk exposures with actual policy terms, deductibles, and exclusions. Inconsistencies between risk disclosure and insurance coverage are an emerging area of regulatory and auditor scrutiny.

Q: How are cat bonds performing relative to traditional reinsurance for managing peak climate risk? A: Cat bonds have outperformed traditional reinsurance on several dimensions. Over the 2019 to 2024 period, cat bond investors earned annualized returns of 8.2%, roughly 300 basis points above investment-grade corporate bonds and with near-zero correlation to equity and fixed income markets. For sponsors, cat bonds provide multi-year capacity commitments (typically 3 to 5 years) at locked-in pricing, compared to annual renewal cycles in traditional reinsurance where pricing can increase 30 to 50% after a major loss year. The primary trade-off is higher transaction costs: cat bond issuance involves legal, modeling, and structuring fees of 2 to 3% of notional value, versus approximately 1% for traditional reinsurance placement.

Q: What steps can companies take if their insurer withdraws coverage for a specific climate peril? A: Immediate options include: soliciting alternative market quotes through specialty brokers with access to Lloyd's syndicates, Bermuda-based carriers, and ILS capacity; evaluating captive insurance structures where the company self-insures through a wholly owned subsidiary (feasible for organizations with annual premiums exceeding EUR 2 to 3 million); implementing physical risk reduction measures (flood barriers, fire-resistant materials, backup power systems) to improve insurability and pricing; and engaging with government-backed residual market facilities where available. Longer-term, companies should invest in climate adaptation to reduce underlying risk exposure, which both reduces insurance costs and limits balance sheet volatility from uninsured events.

Sources

• Swiss Re Institute. (2025). sigma 1/2025: Natural catastrophes in 2024: insured losses reach $145 billion. Zurich: Swiss Re.
• European Insurance and Occupational Pensions Authority. (2025). Report on the Impact of Climate Change on the Insurance Protection Gap in Europe. Frankfurt: EIOPA.
• European Central Bank. (2025). Financial Stability Review: Climate Risk and Insurance Availability in the Euro Area. Frankfurt: ECB.
• Munich Re. (2025). Global Risk Assessment 2025: Natural Catastrophe Losses and Climate Change Trends. Munich: Munich Re Group.
• Artemis. (2025). ILS Market Report Q4 2024: Catastrophe Bonds, Parametric Insurance, and Alternative Capital. London: Artemis.bm.
• Insurance Development Forum. (2025). Global Protection Gap Survey: Barriers to Parametric Insurance Adoption. Geneva: IDF.
• African Risk Capacity Group. (2025). Annual Report 2024: Sovereign Climate Risk Insurance Performance. Johannesburg: ARC.