This study investigates the determinants of students’ green consumption behaviour, with particular attention to the mediating role of perceived benefits. A quantitative research design was adopted, and data were collected from university students using a structured questionnaire measured on a five-point Likert scale. The survey was conducted through both online and direct approaches. After screening the data, 280 valid responses were used for analysis. The proposed model and hypotheses were tested using Partial Least Squares Structural Equation Modelling (PLS-SEM) with SmartPLS software. The results show that attitude toward green consumption, subjective norms, and environmental concern all have significant positive effects on perceived benefits. Among these antecedents, environmental concern has the strongest influence. The findings also reveal that perceived benefits have a strong positive effect on students’ green consumption behaviour and mediate the relationships between attitude toward green consumption, subjective norms, environmental concern, and green consumption behaviour. These results emphasize the importance of perceived benefits in translating psychological, social, and environmental factors into actual green consumption practices. The study offers practical implications for universities, businesses, and policymakers by suggesting that students’ green consumption can be encouraged through environmental education, supportive social influence, and communication strategies that clearly highlight the concrete benefits of green products.