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The study finds that current climate variability already costs Nepal 1.5–2% of its annual GDP, with future climate change projected to add another 2–3% of current GDP per year by mid-century. The most significant drivers of these costs are water-induced disasters, particularly floods. Sectoral analysis indicates that while agriculture faces net losses of approximately 0.8% of current GDP per year by the 2070s, the hydroelectricity sector faces high uncertainty, with projections ranging from increased investment costs of US$2.6 billion due to decreased dry season flows to potential savings of US$170 million if flows increase. To address these risks, the study recommends an iterative adaptation pathway, estimating a need for US$2.4 billion in additional investment by 2030 to mainstream resilience.

The study finds that current climate variability already costs Nepal 1.5–2% of its annual GDP, with future climate change projected to add another 2–3% of current GDP per year by mid-century. Key risks include significant agricultural losses in the Terai region, highly uncertain impacts on hydroelectricity investment costs depending on river flow projections, and a 20–100% increase in the intensity and frequency of high river flows. To address these, the report recommends an iterative adaptation pathway, estimating a need for US$2.4 billion in additional investment by 2030 to mainstream resilience.