Turning the Tide A Financier's Guide to Investing in Blue Carbon Ecosystems 2026

Barriers to private finance flows towards blue carbon ecosystems through insurance TABLE 14 Valuation and attribution challenges A fundamental barrier to scaling insurance-linked investment is the difficulty of accurately quantifying and attributing the risk-reduction value provided by blue carbon ecosystems. Downscaling research into blue carbon ecosystems’ effectiveness in risk reduction into location-specific actuarial models remains complex. Without standardized approaches to measuring avoided losses and incorporating them into pricing, insurers face uncertainty in designing products and setting premiums. Limited performance data and track recordsThere is limited historical data on how restored or conserved coastal ecosystems perform under extreme weather events, making it challenging to model expected outcomes or price risk accurately. Insurers who depend on robust probabilistic modelling may view this uncertainty as an unacceptable underwriting risk. This lack of performance data also constrains investor confidence in catastrophe bonds or other securitized instruments linked to nature-based outcomes. Regulatory and accounting constraintsInsurance regulation and accounting standards in most jurisdictions have yet to integrate natural capital into solvency calculations, risk-based capital requirements or reserving frameworks. Without clear regulatory recognition of ecosystem-based risk mitigation, insurers and reinsurers have limited incentive to incorporate these benefits into product design or portfolio risk models. Transaction complexity and costDesigning parametric policies or other resilience-linked financial instruments requires interdisciplinary collaboration between ecologists, engineers and actuarial experts. These transactions are often bespoke and expensive to structure, limiting scalability and discouraging early market entrants. Transaction costs are particularly high for SMEs and small-scale and/or community-led projects, where potential premium savings or avoided losses may not justify the cost of product development. Misalignment of incentives and limited demand As noted above, the “public goods” nature of risk reduction benefits and the need for a high concentration of high-value assets to underpin insurers’ business case for investing and engaging presents challenges to insurance models scaling. Solutions to unlock insurance finance for blue carbon ecosystems TABLE 15 Direct finance Support pilot projects that demonstrate the feasibility and performance of ecosystem-linked insurance products, such as parametric storm policies or resilience bonds, with payouts tied to ecosystem condition/restoration outcomes. Explore investment in catastrophe or resilience bonds linked to the protective value of blue ecosystems, generating risk-adjusted returns while funding restoration. Design insurance products tailored to coastal SMEs and small-scale producers, potentially with premium subsidies or first-loss support from concessional capital, to create repeatable, scalable risk-transfer channels that complement other financing pathways. Structured finance Partner with governments and multilateral institutions to structure sovereign risk-transfer programmes that integrate nature-based solutions into disaster risk financing. Leverage insurance products to de-risk novel transaction types targeting blue ecosystem conservation and restoration. Enabling finance Invest in improving data, modelling and valuation methodologies to strengthen the actuarial basis for blue carbon ecosystem-linked insurance products. Participate in multistakeholder platforms to develop standardized approaches for measuring and reporting the risk- reduction benefits of blue carbon ecosystems. Financial solutions to unlock private finance flows Targeted financial solutions can help overcome these barriers and accelerate the flow of private capital into insurance and risk-transfer solutions linked to blue carbon ecosystems. There is a growing range of instruments that financial institutions can deploy across the blue carbon project life cycle, from parametric and political risk insurance during implementation to reinsurance, insurance-linked securities and resilience bonds once assets are operational. While most products are currently available post- construction, a significant gap remains at the pre- construction stage where early feasibility and design development works are largely done on risk. This gap constrains capital flows into project preparation but also signals a market opportunity: insights from downstream products can inform the design of new projects and enterprises that de-risk early stage works, strengthen bankability, and may enable the growth of a pipeline of blue carbon projects and enterprises brought to market. Turning the Tide: A Financier’s Guide to Investing in Blue Carbon Ecosystems 22