Instant grocery delivery services also known as Quick commerce is a new type of retail business model which has become popular and grown rapidly in recent years. The quick commerce companies after successfully gaining momentum in the metropolitan cities of India are expanding to the Tier-2 markets. This study focuses on understanding the growth dynamics and financial sustainability of the instant grocery delivery services in the market of a Tier-2 city that is Ranchi. The data which will be used to gain insights are from primary data sources collected from consumer questionnaire and semi-structured interviews of the supervisor/ mangers of the dark stores across the city whereas the secondary data is collected from the authentic sources like the company annual reports, articles published online and other available company information. Factors that shape the financial sustainability from the consumer perception is used which are price reasonability, effect of discounts and offers, customer satisfaction and willingness to use in future as independent variable of hypothesis whereas the factors used to determine the operation of the business such as quickness and reliance on the platforms, accuracy of orders, time saving factor and ease of use of platforms are the dependent variables in this study. It was found that the quick delivery and discounts impact the use of the service platforms. The data suggests that the financial sustainability has a significant impact on the operation of the business model of grocery delivery. The study suggests the instant grocery delivery service model has huge potential in the future and can have optimized operations if it balances out the customer satisfaction and operational efficiency.