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

Barriers to private finance through supply chains TABLE 7 Lack of compelling business case for investment and practice changeIn many sectors, the commercial rationale for transitioning to sustainable production remains underdeveloped. SMEs and small-scale producers often operate on thin margins, and while sustainable practices can improve long-term resilience, they may entail higher short-term costs and uncertain market premiums. Without consistent market demand or sufficient risk-sharing mechanisms, there are limited incentives for producers and upstream purchasers to adopt and finance sustainable practice change. Industry certification standards not suitable for smallholder producers and SMEsMost industry certification systems were designed for medium to large enterprises, making them difficult to access or costly for small and micro-scale producers. This creates barriers for financiers who rely on certification to assess eligibility for disbursing financing, increasing transaction costs and excluding smallholders – which form much of the supply base – from access to capital. Fragmented supply chains also make monitoring, reporting and verification (MRV) of environmental and social outcomes difficult. Ambiguous tenure and informal business structuresA lack of formal land tenure, operating licences and legal business status remains a fundamental barrier in many coastal regions as proof of legality and business permits are prerequisites for most certification and financing processes. While government programmes to assist smallholders to formalize land ownership exist, they are often administratively burdensome for smallholders. Infrastructure and market access deficitsMany blue ecosystem commodities rely on cold-chain logistics and efficient transport. Gaps in storage, processing and transport infrastructure limit access to higher-value markets that reward sustainable practices, thereby compromising the business case for financing improvements in sustainable practices. Solutions to unlock finance flows through supply chains TABLE 8 Direct finance Embed sustainability conditions in loans, trade finance and offtake agreements that tie capital terms to verified outcomes for blue supply chains. This practice also serves to support de-risking due to more resilient production practices. Provide targeted working capital and transition finance for small and mid-scale producers and coastal SMEs in the blue supply chain. Doing so broadens a financier’s investible universe while supporting inclusive growth. Provide long-term, non-predatory offtake models from upstream purchasers to offer certainty to suppliers on the value of transitioning to sustainable practices. This mitigates the purchaser’s climate and nature risk and potentially provides access to premium markets and sustainable finance. Fund capex for acquisition of equipment required for sustainable post-harvest handling, storage and cold-chain logistics, helping producers access premium aquaculture markets. Structured finance Structure instruments such as sustainability-linked loans, trade finance, guarantees and blended finance to tie capital costs/terms to measurable outcomes. Provide guarantee facilities to reduce perceived default risks for sustainable producers and SME borrowers, thereby enabling lenders to competitively price credit for transition to sustainable operations. Enabling finance Provide concessional, philanthropic or technical assistance to support pilots, certifications, capacity building and upfront investment in sustainable aquaculture practice change from production through to post-harvest. Work with local financial institutions to deploy SME-focused lending products, using guarantees, first-loss capital or technical assistance to reduce risk and expand their ability to finance coastal producers. This strengthens delivery channels and catalyses broader market participation over time. Various financial solutions can serve to unlock private finance flows to conservation and restoration projects in blue carbon ecosystems via supply chains. Image credit: The Earthshot Prize Turning the Tide: A Financier’s Guide to Investing in Blue Carbon Ecosystems 14