Employee task performance is considered to be of crucial importance for organizational survival and growth, at the same time, the struggle for organizational survival and growth most especially in the current economic climate gives rise to perceptions of job insecurity among employees thereby making the perception of job insecurity a relevant topic. This study examined the effect of perceived job insecurity on task performance. In addition, the effect of both quantitative and qualitative facets of job insecurity on the different components of task performance, was investigated. By making use of the multi-stage sampling technique, a total of 342 employees with age range of 23 to 46 years were proportionately selected from the cluster that represents each bank. Furthermore, the close ended and structured questionnaire was utilized in a descriptive cross-sectional research design to elicit responses from these employees. Based on the regression analysis conducted, it was revealed that while perceived job insecurity as a uni-dimensional construct exercise a significant and negative effect on task performance, both quantitative and qualitative job insecurity also have a significant and negative effect on this performance with the later, found to exercise a stronger negative impact. Furthermore, results also indicate that while quantitative job insecurity is more negatively related with the job quality component of performance, both job quantity and job time limit are more negatively related with qualitative job insecurity. To conclude, recommendations were made on the need for organizations to focus intervention on antecedents of job insecurity which have been classified as macro level, micro level and personality factors with the view of reducing the incidence of perceived job insecurity. It was also recommended that managers should endeavor to concentrate more resources on those employees who suffer from qualitative job insecurity whenever there is a need to make use of these interventions, while also being in cognizant of the fact that a different level of intervention is required for employees with different level of job quality, job quantity and job time limit.