The paper deals with issues of environmental, social and economic performance in respect with corporate sustainability in small and medium-sized enterprises in the Czech Republic. With an increase in importance of performance management and measurement, Corporate Sustainability Reporting is now also gaining in importance. Neglecting such performance factors in consolidated Corporate Sustainability Reporting by corporate management might lead to further and deeper problems. Sustainability in combination with business environment was implanted in the subconsciousness under the influence of environmental approaches in enterprises. The aim of corporate sustainability is to generate a maximum increase in the value of the company, customer and employee by exploiting opportunities and incorporating risks derived from environmental and social development trends. Sustainability is a strategy of the process of sustainable development. Sustainability of small and medium-sized businesses in the Czech Republic may bring effects in the capturing the practice in the form of analyses of the environmental, social and economic performance, increasing the interest of stakeholders in the issues, competitiveness, increase in market share, etc. Changes in the way business is done are required if sustainability is to become part of corporate management. The aim of this paper is to analyze environmental, social and economic performance in small and medium-sized enterprises,and to propose key performance indicators.