The article is devoted to the study of the peculiarities of the functioning of the marketing mechanism in the field of customs services. The definition of customs marketing as a management concept in market conditions is given. It is noted that the modern concept of customs services marketing is aimed at solving the problems of economic security and promoting trade through the use of customs tools at the level of international standards. The purpose of customs marketing is to increase the quality and competitiveness of customs administration, to ensure the prerequisites and optimal conditions for promoting international trade, to accelerate foreign trade turnover and to ensure the comfort of conducting foreign economic activities without reducing the effectiveness of customs control. It is emphasized that the marketing of customs services is a doctrine, a business philosophy, a tool for assessing the spheres of foreign economic activity, monitoring customs services and the activities of customs authorities, a technology for identifying requirements, demand and active promotion of customs services at the business and state level for the formation, search and service of meeting needs clients and participants in foreign economic activity. It has been proven that the ultimate goal of the functioning and development of the sphere of customs services is the effective coordination of all areas of activity of customs authorities with the requirements of the modern market. Practical solutions for the development of marketing in the customs sphere are offered. The main measures necessary for the further development of the marketing system in the customs sphere and ensuring the quality and high efficiency of customs services have been determined. Provisions have been formulated regarding the formation of an effective balanced customs system, ensuring its effectiveness and improving the quality of the range of services provided.