The research work examined the effect of reward systems on employee performance in selected private tertiary institutions in Ekiti State, focusing on Afe Babalola University, Crown Polytechnic, and Fabotas College of Health Sciences and Technology. The research work was driven by inadequate reward structures, worker displeasure, and their institutional performance. Specifically, the research investigated the effect of monetary rewards, non-monetary rewards, and employees’ perceptions of reward fairness on performance outcomes. A descriptive survey research design was adopted. The population comprised 264 academic staff members; while a sample size of 159 respondents was determined using Yamane’s formula and selected through proportional sampling techniques. Data were gathered through structured questionnaire. Descriptive statistics were used such as frequencies and percentages were used for data analysis, while Chi-square statistics tested the hypotheses at 0.05 significance level. Findings shown that both monetary and non-monetary rewards significantly influence employee performance, motivation, and job satisfaction. Salary increments, bonuses, recognition, promotion opportunities, job security, and professional development were found to positively affect employee commitment and productivity. The Chi-square results showed significant relationships between monetary rewards and employee performance (χ² = 129.71, p < 0.05), non-monetary rewards and employee motivation (χ² = 151.03, p < 0.05), as well as reward fairness perceptions and employee performance (χ² = 100.84, p < 0.05). However, budget limit, poor communication, and weak performance evaluation systems were identified as challenges affecting effective reward implementation. This was concluded that a well-adjusted, nondiscriminatory, and translucent reward system is to improving employee performance and organizational effectiveness in private tertiary institutions. The study recommends solidification reward policies, cultivating communication, and supporting performance evaluation structures with recognized reward structures.