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India faces significant climate vulnerability, with adaptation investment needs estimated between USD 14 billion and USD 67 billion annually for 2015-2030. While the government utilizes a 'co-benefits' approach—integrating adaptation into broader development goals—this makes it difficult to track specific adaptation funding. Analysis of six states' updated State Action Plans on Climate Change (SAPCCs) reveals a collective annual investment need of INR 444.7 billion (USD 5.5 billion) for 2021-30. State governments are the primary drivers of adaptation finance, but their capacity is constrained by high debt levels and strict borrowing limits under the Fiscal Responsibility and Budget Management (FRBM) Act. The report recommends that the 16th Finance Commission include adaptation variables in fund devolution and suggests using Public-Private Partnerships (PPPs) and blended finance to attract private capital, which is currently limited by data gaps and uncertain returns.