The paper investigates the possibilities of improving the competitiveness of domestic companies through the integration of the concepts of sustainable development, knowledge and innovation. Starting from a theoretical literature review, a green model of business improvement was developed that connects the ecological, social and economic dimensions of sustainable development. The model shows how the rational use of resources, the implementation of clean technologies and the raising of environmental awareness can become a source of innovation and stable market positions, while continuous learning and development of employees strengthen the productivity and competitive position of the company. The paper provides guidelines for the introduction of socially responsible and long-term sustainable business, highlighting the importance of education, innovation and strategic management of resources. Although the model is based on theoretical insights, its practical application opens up space for empirical verification and adaptation to the specifics of the domestic economy.