Climate finance has been central to climate diplomacy for over three decades. The scale required is enormous; emerging markets and developing countries, other than the People’s Republic of China (PRC), need $2.3 to $2.5 trillion per year by 2030, rising to around $3.1 trillion to $3.5 trillion by 2035.
The numbers are big and the ambitions of climate finance are bold, yet adequate, affordable climate financing, and its ability to advance climate action, remains a work-in-process.
A Look Back at the Financial Mechanism
Over the years, the supply of finance has increased. In 2024, climate finance was reported to have reached $2.4 trillion. This headline figure, however, is largely driven by domestic spending in PRC, the United States, and Europe. In the same year, at COP29, the UNFCCC delivered the New Collective Quantified Goal (NCQG): at least $ 300 billion a year for developing countries, with a call to scale up collective mobilization from all sources to at least USD 1.3 trillion by 2035.
While COPs have raised climate on national agendas, the concessional dollars the UNFCCC’s Financial Mechanism was meant to unlock remain largely absent. The mandate for the Financial Mechanism was to channel grants, concessional resources, and technology from developed country parties to developing countries.
In 1992, UNFCCC created its first operating entity by bringing the Global Environment Facility (GEF), then a $1 billion World Bank pilot, under its fold. As of September 2025, net cumulative funding approvals total $ 24.6 billion over the last three decades.
Two decades after GEF came the Green Climate Fund (GCF). Pledges total around $29 billion. Approvals across projects have crossed $20 billion, with a disbursement target of $1 billion to$1.2 billion for 2026.
Three other funds — the Adaptation Fund, Least Developed Countries Fund and Special Climate Change Fund — have received pledges or contributions of around $4.8 billion.
The Loss & Damage Fund, heralded at COP27 and operationalized at COP28, with less than a billion dollars in pledges, remains symbolic.
The run‑up to the Paris Agreement produced the $100 billion goal. Agreed in Copenhagen in 2009 and formalized in Cancun, it was to be delivered by 2020. That such a modest target required an 11‑year span is telling. It took two more years to hit the number, with MDB loans forming the major chunk. Many view these as relabeled loans, since no additional capital contributions were made. Adjusted for grant equivalence, delivery significantly fell short.
Thirty COPs on, the Financial Mechanism has not scaled beyond volumes that look boutique against what is required.
A Bigger Number, But Not a Breakthrough
Against such historical under delivery, the NCQG could have fixed a hard but pragmatic target for making available grants and additional, concessional finance that the developed countries found truly doable.
Instead, the NCQG seems structured to hit a headline target. It sweeps in all sources: public, private, bilateral, multilateral, and domestic, including loans from developing countries. The framework requires neither concessionality nor additionality. MDB lending is counted in proportion to the capital contributions of all shareholders, not only developed countries. It offers no new capital infusion, even though a few tens of billions of dollars could unlock significant lending headroom.
Such framing risks the goal becoming a number chase, enabling a “collective” declaration of victory even if real concessional public finance barely grows.
At the same time, NCQG could draw the UNFCCC into an expanding mandate of tracking flows. The OECD has noted that tracking the $300 billion goal will require activity-level data, while the $1.3 trillion call could be monitored using aggregate indicators. This makes debate and diplomacy around data inevitable, even though climate outcomes are uncertain.
Core Challenges and the Way Forward
Three structural problems persist. First, reported finance shows little correlation with real outcomes,whether in tons of CO₂ curtailed, resilience built, or systems transformed. Second, the system celebrates rhetorical ambition rather than additionality. Third, a persistent gap remains between pledges and actual flows.
Climate finance is an enabler, not the endgame.
With the Baku‑to‑Belém $1.3 trillion Roadmap now agreed and endorsed at the last COP in Brazil, parties need to draw lessons from the past and focus on execution.
Fiscal and political conditions make it unlikely that grants or concessional money will cross borders in bulk. What are the options?
First, private sector has the capacity to co-create substantive impact through the existing supranational networks. Climate diplomacy can unlock it by exploring politically acceptable pathways and appropriate guardrails. With an institutional role in multilateral banks and funds, private players can help modernize operations, develop bankable project pipelines and scale delivery.
Second, dedicate a portion of the new financing to energizing the UNFCCC’s Technology Mechanism. The Climate Technology Centre and Network (CTCN) has extended technical assistance to 100+ countries, produced multiple reports and contributed to policy evolution, but the resulting emission reductions remain modest; UNEP last reported CTCN-enabled reductions of 12.9 million tons of CO2-equivalent per year.
The Belém Technology Implementation Program offers a window for a fresh start. Supporting low- and no-carbon innovation in targeted areas could lower costs and enable the energy transition to move ahead on its own strengths, without requiring policy incentives and subsidies. Historically, economic logic—not policy intent—has been the primary driver of energy transitions.
Third, though not easy, explore putting new capital into MDBs.
Meanwhile, it is time to prioritize transfer of knowledge and technology to developing countries and use globally available funding more effectively, as Helmut Kohl urged as early as COP 1.
Without such a shift, climate finance will keep breaking records, just as global emissions will.
