Developing nations face $3.2 trillion climate funding shortfall

**COP31 conference floor with delegates**.

The $1.3 trillion annual funding gap confronting emerging markets and developing economies now dominates discussions at COP31 in Antalya, Turkey. The summit has laid bare a stark divide between the ambitious climate finance targets established at COP29 and the practical obstacles to securing capital in global markets.

The New Collective Quantified Goal (NCQG), finalized two years ago, targeted $300 billion in annual climate finance by 2035, with a broader objective of $1.3 trillion for developing nations. Yet independent analyses indicate these economies—excluding China—will require $3.2 trillion annually by 2035 to address both climate objectives and development priorities. While domestic resources, including tax reforms and the elimination of fossil-fuel subsidies, could cover roughly $1.9 trillion of this total, the remaining $1.3 trillion must originate from external sources, representing a sevenfold increase over current cross-border flows.

Multilateral development banks (MDBs) and private investors are expected to take the lead, but projections highlight significant structural barriers. Private capital is projected to contribute about $650 billion, while MDBs would provide $300 billion to $400 billion, and bilateral public sources around $80 billion to $100 billion. However, official reporting often inflates these figures by incorporating non-concessional commercial loans and guarantees, masking the true demand for grant-equivalent support.

Public funds fail vulnerable nations

Private investors are likely to prioritize mitigation projects in high-emitting, middle-income countries, jurisdictions with commercial viability but limited scale. In contrast, the $300 billion public component of the NCQG is earmarked for adaptation infrastructure and grants in low-income nations. This disparity risks leaving the most vulnerable countries without essential funding.

Blended finance, combining public or philanthropic capital with private investment, has been promoted as a solution, yet its effectiveness falls short of expectations. Development finance institutions historically targeted a 1:5 public-to-private leverage ratio, but MDB and OECD data show actual private co-mobilization in lower-income nations averages just $0.20 to $0.50 per public dollar. However, “any headline number on blended finance obscures a large number of variables, so any generalization is going to be weak,” said Joan Larrea, CEO at Convergence, a global network supporting blended finance. Private involvement is gaining momentum, however: “Within the blended finance deals tracked, the ratio of private investment dollars mobilized relative to catalytic and concessional funding continues to grow.”

Private-sector dollars in blended finance transactions increased by 27% in 2025, reaching $11.2 billion, up from $8.8 billion in 2024, according to Convergence’s State of Blended Finance 2026 report. Commercial banks drove much of the growth, with their contribution rising from $4.3 billion to $7 billion. While MDB credit enhancements can suppress key risk parameters and reduce debt yields, underlying currency-hedging costs remain a serious obstacle.

Regulations and currency risks block investments

Regulatory frameworks further restrict private participation. Under Basel III/IV rules, commercial banks face substantial capital requirements for unrated emerging-market infrastructure debt. Similarly, Solvency II regulations penalize institutional investors allocating funds to unrated project debt without investment-grade backing. Currency fluctuations exacerbate the challenges. Clean energy projects in emerging markets often generate revenue in local currencies, but debt service and equipment costs are denominated in hard currencies like dollars or euros. In frontier markets, where liquidity is limited and swap markets depend on central banks or primary export industries, hedging tenors extend only six to 12 months. This exposes investors to significant rollover risk.

Joe Delvaux, a senior fixed-income portfolio manager at Amundi, explained that when fully hedged returns fail to meet minimum investment benchmarks, institutional capital withdraws. When fully hedged returns fail to clear minimum investment hurdles, institutional capital simply walks away, Delvaux said: “If the investment does not pass certain key hurdle rates or possess such a decent net positive return post-hedging, why would an investor want to carry the risk if there is no major return being generated?”

Climate disasters worsen financial instability

Climate vulnerability is intensifying this cycle. Credit rating agencies are downgrading sovereigns in the Global South due to extreme weather events, which reduce fiscal revenues and increase reconstruction costs. Lower sovereign ratings widen bond spreads, raising borrowing costs for local utilities and corporate borrowers to prohibitive levels of 12% to 18% or more.

Whether a project accelerates debt risks or enhances creditworthiness hinges on execution and viability, because delayed or failed projects can cause power deficits and blackouts that paralyze industry and strain national balance sheets. Conversely, well-managed projects can deliver vital energy, boost economic output, and strengthen sovereign credit profiles. “It comes down to country by country, project by project,” Delvaux said.