During COVID-19, the banking industry saw a paradigm shift of customers from “traditional” to “online” platforms. This research explored the moderation effect of age and gender in the relationship between online banking service quality and customer satisfaction during COVID-19. The study used explanatory and accurate novel methods to study the relationship between online banking service quality and customer satisfaction in the Indian banking industry. Structural equation modeling was used for testing the relationship. Multi-group moderation technique was employed to explain the moderation effect. The study highlighted that age significantly moderated the relationship between responsiveness, competence, and customer satisfaction. Gender significantly moderated the relationship between competence and customer satisfaction. The study’s novelty lies in finding the critical determinant of customer satisfaction in online banking during COVID - 19 and explaining the moderation effect of age and gender. Moreover, this study addressed feedback and complaint management, which has not been studied widely in the context of quality and satisfaction.