Job performance is defined as an individual's behavior that is relevant to the organization's goals and can be measured with respect to the individual's contribution. The individual differences most commonly referred to as job performance determinants are general cognitive ability, personality traits, and, more recently, emotional intelligence. The purpose of this study was to examine the relationship between demographic characteristics, general cognitive abilities, personality traits (extraversion and neuroticism), emotional intelligence with job performance. The study included 76 bank tellers, of which 17 were men and 59 were women. The results showed that younger, less experienced, more educated and more extroverted employees had a better job performance. With hierarchical regression analysis, there were no significant contributions of demographics, personality traits, general cognitive ability, and emotional intelligence to job performance, except for extraversion, which was found to contribute to job performance in a model that did not control for general cognitive ability and emotional intelligence. Possible causes of findings that general cognitive ability, emotional intelligence, and neuroticism do not correlate with job performance can be attributed to the small sample and an inadequate appraisal of job performance.