This study examines the influence of corporate social responsibility (CSR) on green purchase intention (GPI) and the primary predictors of young customers' green purchase behaviour in Mumbai, India. It is based on Carroll's CSR model and the Theory of Planned Behaviour (TPB) (Ajzen, 1991). The determinants are divided into the variables of awareness, attitude, and social factors, leading to green purchase intention which results in green purchase behaviour. Awareness, attitude and social factors are the variables influenced by the Corporate Social Responsibility projects and activities undertaken for the youth in Mumbai by different companies. Economic factors are taken as the moderator which influences the relation between purchase intention and purchase behaviour. Data was collected from respondents aged between 18-35 years old. The data analysis has been conducted using Statistical Package for the Social Sciences (SPSS) software. The findings confirm the TPB and the body of literature on the theory, and they also point to the need for additional youth-focused awareness initiatives to encourage green consumer behaviour across industries.