The purpose of the research is to assess the support provided for the sector of Latvia's fish processing in the framework of the EU funding instruments, its use and return of investments, providing recommendations for the development and perfection of further policy of the sector. The author evaluated the return of investments, considering the analysis of the made investments and financial indicators of fish processing companies, using several significant indicators (the number of employees, value of fixed assets, net turnover, net added value, value of production and productivity). As a result of analysis, the author discovered that investments' availability and their use have a significant influence on the development of Latvia's fish processing sector. In further planning of the sector's development it is advisable to take into account changes in the amounts of caught fish, availability of raw materials, as well as social, economic and political changes in markets. The formed combinations of indicators may be used in scientific researches evaluating the return of investments; they may facilitate researches on its calculation and importance, as well as may assist the institutions involved in the fisheries' policy formation to work more successful and improve the common policy in the branch.