By conducting an in-depth analysis of three selected businesses that are listed on the Bombay Stock Exchange (BSE), this research project examines the interactive relationship between capital structure and business performance. The objective of this ten-year research project, which spans from 2015 to 2024, is to provide insight into the impact of the capital structure decisions made by these businesses on their overall business performance. By employing a methodology of mixed approaches, the research combines qualitative assessments of management decisions, market trends, and macroeconomic factors with quantitative analysis of financial reports and key performance indicators. Financial ratios such as return on assets and debt-to-equity ratio are analyzed to determine the impact of capital structure decisions on the firm. The findings of this research contribute to the existing body of knowledge on the relationship between capital structure and the performance of a company.