This study explores the role of digital payment systems in transforming stock market participation, focusing on three key objectives: evaluating their impact on enhancing stock market participation, examining their effect on cost efficiency, and assessing their influence on user satisfaction levels. A primary data and quantitative research methodology was employed, with data collected through structured surveys and analyzed using statistical techniques. The findings reveal that digital payment systems, such as UPI and mobile wallets, significantly enhance stock market participation by improving accessibility and convenience. They also contribute to cost efficiency by reducing transaction fees and processing times. Furthermore, these systems positively influence user satisfaction through their ease of use and reliability. However, challenges such as cybersecurity concerns and digital literacy gaps remain. The study provides actionable understandings for stakeholders to optimize digital payment systems, development greater financial inclusivity and efficiency in stock market activities