Adaptation finance needs a delivery system beyond new funds

by Akhand Tiwari and Graham Wright
Nov 4, 2026
6 min

This blog explores why adaptation finance often does not reach vulnerable communities and businesses. It suggests the challenge goes beyond funding, and the gap lies in delivery. The blog outlines six practical steps to strengthen country-level financing systems, allocate risks effectively, and channel suitable capital to locally relevant climate adaptation solutions.

Why does so much adaptation finance still fail to reach the last mile?

The adaptation finance debate is focused almost exclusively on how much more money we need. Yet this equally important question receives far less attention.

Why the adaptation finance gap is also a delivery gap

The United Nations Environment Programme estimates that developing countries will need about USD 310-365 billion a year for adaptation by 2035, while international public adaptation finance was USD 26 billion in 2023. That enormous financing gap is alarming. Yet a narrow focus on its size can obscure an equally important problem: we still lack an effective delivery system to move the right type of capital to the firms and households that need to adapt.

The withdrawal of donor agencies has intensified funding concerns. Yet a significant part of the adaptation finance challenge is operational. Capital and capability must move through a chain from policy to development finance institutions (DFIs), financial institutions, solution providers, and end users. Each handoff has different binding constraints. As SNV notes, viable businesses need different types of capital as they move from validation to scale, each with distinct risk profiles. Gireesh Shrimali of the Oxford Sustainable Finance Group at the Smith School notes in his LinkedIn post that actors should allocate each risk to the party best able to bear it. Given current funding constraints, we must also identify the minimum public funding required to make each transaction financeable.

The channels exist, and infrastructure gaps matter. Yet the architecture that connects needs, investable activities, appropriate products, risk-bearing instruments, and wholesale capital is missing.

Which two questions should determine the financing tools we use?

1. What capital fits the stage of development or maturity?

Grants and technical assistance are most valuable when they validate technologies, business models, measurement systems, and distribution channels that private investors will not yet underwrite. As the business model becomes clearer, concessional debt, guarantees, or impact-first capital can absorb or share the residual risks. Commercial capital becomes more feasible when cash flows, governance, and risk data justify it. This progression does not follow an automatic “graduation” path or fixed rule. Some adaptation investments generate substantial public benefits but little or no private cash flow, while providing the foundations for other adaptation activities or enterprises. These investments will continue to need public finance. The north-star test is whether scarce public capital buys additional resilience or mobilizes finance that would not otherwise occur.

GCF FP252 project page; SNV, Building the Impact Capital Continuum

2. Which actor and instrument can best address each binding risk?

The practical question is: “Can donors or public sector actors de-risk this?” Three more precise questions follow: “Which specific risk prevents a viable investment from proceeding? Who can manage it most efficiently? And what is the least-cost transfer or sharing mechanism?” This reflects Girish Shrimali’s argument that we need targeted risk allocation rather than blanket guarantees, and often a combination of instruments where several risks constrain the investment. Similarly, the Organisation for Economic Co-operation and Development (OECD) recommends a portfolio of approaches to overcome the small transaction sizes associated with adaptation and financiers’ unfamiliarity with the asset class.

Typical matches depend on the binding constraint. Policy and regulatory risks usually require policy reform. Those reforms may then create opportunities for blended finance. Portfolio guarantees, contingent liquidity facilities, or meso-level insurance can address credit risk and covariant physical risks. Experience in inclusive financial services shows that foreign-exchange and tenor mismatches may require local-currency funding or hedges. When small transaction sizes make loans uneconomic, aggregation mechanisms and origination incentives could reduce transaction costs. Yet the global network of inclusive financial institutions built over the past 50 years remains a hopelessly underused channel for precisely solving this problem. MSC’s work shows that banks, microfinance institutions, cooperatives and other providers already have the clients, distribution infrastructure and transaction histories needed to originate adaptation-linked finance at scale. The challenge is to repurpose existing products, adjust terms and risk management to climate realities, and develop new products only where necessary.

What should a country-level adaptation finance architecture do?

Put the two frameworks together and six practical rules emerge. Each shift attention away from creating another financing window and toward repairing the hand-off that stops adaptation investment from reaching the last mile.

Start at the last mile and work upward.

Use participatory hazard maps, vulnerability and supply-chain analyses to identify the adaptations people and firms value, need and will use; their costs and cash-flow effects; and the products required to finance them. MSC’s locally led adaptation toolkit provides a seven-step route from supply-side assessment to a costed adaptation plan. Applications in Bangladesh, Uganda and India show how an analysis of hazards, livelihood impacts and cash flows can reveal specific adaptation investments and the product changes needed to finance them. MSC’s 3Rs (repurpose, rejig, and reinvent) offer a complementary approach to adapting financial institutions’ product suites. MSC’s recent work also distinguishes between the unresolved adaptation funding gap and an incomplete “financeability architecture.”

2. Define what an investable adaptation transaction looks like.

Move beyond broad sector labels and establish a practical chain from adaptation need to activity, expected resilience and cash-flow effects, financeability, and appropriate instruments. Define eligible activities and outcomes, the evidence required at origination, safeguards against maladaptation, and how teams will measure adaptation benefits. This must be simple enough for a loan officer to recognize an eligible investment and standardized enough for DFIs to aggregate thousands of small transactions. MSC’s work on climate-smart agriculture in India shows how borrower segments, technologies, and provider risks can inform product design, operational processes, and standardized financing approaches.

3. Separate capability gaps from risk gaps.

Diagnose the problem before selecting an instrument. Technical assistance (TA) can address weak financial models, data, governance, credit assessment, or product design, whereas a guarantee cannot. By contrast, more capacity support or TA cannot solve a genuine loss allocation or liquidity problem – these require blended finance. However, better climate-risk information does not automatically lead to better adaptation finance. If lenders identify vulnerable clients more accurately but do not change their products, credit assessment, or risk allocation, improved risk assessment may lead to less lending to those who most need to invest in adaptation.

4. Layer risk management at both institution and client level.

CGAP recommends a layered approach that combines reserves for routine volatility, contingent finance for medium shocks and meso-level insurance for severe shocks. Together, these layers provide a useful way to think about products that help clients invest, hedge, cope, and recover. Insurance can address defined residual risks, but it cannot substitute for grants, guarantees, suitable credit structures, or adaptive social protection where the underlying investment is not financeable.

5. Move from bespoke deals to standardized portfolios.

Small transactions will not scale if every guarantee, loan, or adaptation assessment is custom-built for each specific hand-off or challenge. Standard product templates, pooled receivables, portfolio guarantees, and shared data can cut origination costs. The World Bank Group’s guarantee platform illustrates the institutional logic of simplifying and standardizing guarantee products. MSC’s climate-smart agriculture work in India translated borrower segments, needs, and technologies into standardized financing products and operational processes that regulated financial institutions can integrate.

6. Measure additionality and market development alongside leverage.

Track who gains access to finance they would not otherwise have received, changes in price and tenor, portfolio performance, resilience outcomes, and the public risk-bearing required for each additional dollar mobilized. Aceli Africa provides an example already in progress. Its 2020-2025 program reports 55 lenders, 5,576 loans, and USD 440 million in agri-SME lending, with USD 10 in private lending per USD 1 of incentives, and explicitly accepts lower leverage to achieve higher additionality through smaller loan sizes.

How can adaptation finance reach the last mile? Ask: “Which broken hand-offs prevent a viable adaptation investment from progressing, and what minimum capability, risk allocation, and capital package can repair them?”