The Russian economy needs a qualitative leap in the rate of economic development. The peculiarity of Russia development is the functioning of municipalities and entire regions with a single industry specialization of the economy. In the context of macroeconomic instability, the above-mentioned territories need preventive support. The instrument of such support since 2015 has been the territories of advanced social and economic development, initially created in the Far East, and since 2016 in single-industry towns. Purpose of the research is to identify and analyze the risk phenomenon of deviations from the goal of socio-economic development of territorial economic entities that have received the status of TASED resident. The city of Naberezhnye Chelny was chosen as the object of study as the first monoterritory with the status of TASED. The objectives of the research work are to detail the essential characteristics of TASED their actualization in the context of the identified problems. The relevance of creating TASED in cities with a single industry economy is determined, the importance of TASED as a zone of favorable economic activity and the emergence of growth points, as well as an institution for the development of the economy of territorial entities, is emphasized. The advantages of TASED as a certain type of territorial formations for residents of TASED are substantiated, and, on the other hand, possible risk factors of deviations from the development goal of TASED are identified and the directions of the search for anti-risk management decisions are identified. In the process of writing, general scientific methods of theoretical and empirical knowledge were used: the method of scientific abstraction, the method of analogies, the logical method, methods of analysis and synthesis, the method of formalization, the method of classification, system, statistical, structural, functional, economic analysis.