The paper examines the efficiency indicators of cargo storage in 3PL logistics companies. A system of indicators of the efficiency of cargo placement in a warehouse is presented, divided into groups: an indicator of the efficiency of filling warehouse cells, an indicator of warehouse occupancy and an indicator of the relevance of the warehouse configuration. The indicator of the relevance of the warehouse configuration is of particular value for 3PL logistics companies, as it allows them to assess the compliance of current cell sizes taking into account the changing cargo composition and make strategic decisions about the need to change the warehouse configuration. A logical scheme of making decisions on measures to optimize the placement of goods in a warehouse, depending on the magnitude of the indicators, is presented. The results of the work can be used to build a comprehensive management system for the efficiency of cargo storage in 3PL logistics companies.