In the context of escalating global environmental and social challenges, sustainability is increasingly emphasized as a key factor in the business strategy of companies to remain relevant and successful in the market. This paper thoroughly explores how sustainable practices within managerial economics can significantly enhance operational efficiency, reduce costs, and stimulate innovations within organizations. The analysis focuses particularly on a case study of Tesla, where a regression model was used to investigate the relationship between revenue and the implementation of sustainable initiatives, showing a strong correlation between revenue growth and the adoption of sustainable practices. Case studies from Croatia, as well as globally recognized companies such as Unilever and Patagonia, illustrate how integrating sustainability can significantly contribute to a competitive advantage by supporting innovations and increasing market share through enhancing corporate image and reducing environmental impact. Additionally, the paper highlights the challenges businesses face when adopting sustainable practices, such as high initial costs, challenges in monitoring and reporting, and regulatory constraints. The regression analysis of revenue and environmental indicators within Tesla provides insight into how financial success can be closely linked to sustainable practices and shows how strategic application of sustainable initiatives can lead not only to improved business stability but also to ensuring long-term sustainability. This paper encourages considering sustainability as an integral part of corporate governance, not just as a response to external pressures but as a key element in shaping modern business strategies that meet rapidly changing global demands. This paper explores sustainability and encourages viewing businesses as a vital part of strategic planning that creates value for all stakeholders, not just as a cost or regulatory requirement. The paper uses theory and data to explain how sustainable projects affect financial stability, social responsibility, and environmental sustainability. This promotes a comprehensive approach to sustainable development by encouraging continuous dialogue and research on sustainability, especially on creating effective standards that help businesses balance their bottom lines with social and environmental issues.