E-commerce has revolutionised the entire business economy. With benefits such as hassle-free, quick and real-time banking, internet banking offers immense benefits to today's consumers. In spite of these benefits, online banking still lacks far behind the number of online users in India. To ensure greater participation in online banking, banks need to understand customer's perception towards e-service quality. Customers perceive these services as quality attributes. The study attempts to examine the determinants of e-banking service quality and their impact on customer satisfaction. Based on convenient sampling, the study used primary data of two private sector banks in Delhi region to produce a 5-factor structure. The exploratory factor analysis produces dimensions of efficiency, trust, fulfilment, responsiveness and systems critical to e-service quality satisfaction. Regression results show trust and privacy as the most critical factor influencing e-banking service quality perceptions. Further, the study provides theoretical and managerial recommendations for increasing online banking adoption and improving overall customer satisfaction. Limitations and future scope of research are further discussed.