Abstract: Revenue Realization is a management system that measures revenue. The process can be used to identify factors that drive revenue, measures the performance of these factors, and taking action to maximize revenue. In the East African region, Cargo travels for long distance. Unfortunately however there is an increase of theft, tax evasion, delays in clearance which results to increased cost. The main purpose of the research study was to establish the electronic cargo tracking system and its effect on revenue realization in East Africa Member Countries. The study was guided by four objectives: To establish the effect of operational performance on revenue realization. To find out the effect of cost on revenue collection on revenue realization. To establish the effect of tax losses on revenue collection on revenue realization.