This study examines the impact of accounting conservatism (AC) on firm performance (FP). Furthermore, the study investigates the moderating role of the joint audit (JA) approach in this relationship in Egyptian exchange. The study used a sample of 336 firm-year observations of non-financial firms listed in the EGX 100 Index of the Egyptian stock market from 2016 to 2023. Panel data analysis with fixed-effect models was utilized to estimate the results. The findings concluded a positive effect of AC on FP in the long term, which indicates that the increase in the level of AC is associated with a higher FP. The findings also showed that JA moderates the relationship between AC and FP. The findings contribute to the literature on accounting practices and performance by conducting more research that can provide an additional explanation of the impact of JA on AC practices and FP in the Egyptian context. These findings help regulators, investors, and policymakers realize the importance of JA in increasing AC levels and improving FP. The study's unique contributions to the literature include exploring the JA as a moderating role that can significantly affect the relationship between AC and FP, which leads to higher FP in the future.