Adaptation Gap Report 2025

The report updates the cost of adaptation finance needed in developing countries, putting it at US$310 billion per year in 2035, making adaptation financing needs in developing countries 12-14 times as much as current flows. Both public and private finance must step up to increase adaptation, taking care not to increase the proportion of debt instruments used by vulnerable nations.

The report recommends that progress can be made on three key issues:

1. Contain the growth of the gap. Mobilizing more adaptation finance will only be helpful to close the adaptation finance gap, if that gap stops growing.
2. Increase the volume of adaptation finance with the help of new climate finance providers.
3. Engage the financial system more broadly. As well as increasing the amount of adaptation finance, it is imperative to integrate climate resilience in investment decisions in both public and private sectors