Emotional intelligence has effects on financial effectiveness of organizations by handling the overconfidence bias, and the objective of our research study is to investigate that statement confirmed from the information getting from executives of financially successful organizations. In methodology, cross-sectional design has been used and questionnaires were used for data collection from the sample of 300 executives from financial and non-financial organizations which were enlisted on SECP. The deductive research approach was used, as the research was based on the theoretical framework of behavioral finance. Hypotheses were tested through correlational & regression analysis. For testing the mediation effect of overconfidence bias, Baron and Kenny method was used. The mediation results has been confirmed through the technique of Structural Equation Modeling (SEM). The results and conclusion of this research suggested that existence of direct and positive relationship between emotional intelligence has been found in executives for achieving financial effectiveness of organizations through mediating role of overconfidence bias.