Requirements of the European Union in the field of trade and development prospects to the sector are expressed in the quality of the offered products and the means for their sale. The European and world experience show that the implementation of quality management systems makes it possible to take active action to increase the competitiveness and efficiency of commercial enterprises. Among the main problems faced commercial enterprises, is the Organization and maintaining a successful business in the face of changing market and heady business environment. Market survival inevitably associated with the competitiveness of commercial enterprises. Survey of the quality management is dictated by the need to present how retailers deal promptly with the challenges they face in a rapidly changing business environment. Competitiveness is fundamental composite indicator, which is influenced by many factors: strategy of commercial enterprise; the presence of material, labor and financial resources; training and motivation of personnel; innovation potential; market share; efficiency of management. The provision and improvement of quality is one of the essential factors for increasing the market share of commercial enterprise, hence the competitiveness. The present study aims to present the competitive advantages they receive commercial enterprises by introducing quality management system. For this purpose, first of all, should be provided the link between the quality and the competitiveness of the commercial undertaking; next to identify the principles and requirements of the international standards for quality management systems; third, to explore to what extent have invaded the quality management systems among the Bulgarian commercial enterprises; and fourthly to identify benefits that provide integrated systems on the competitiveness of the commercial enterprise.