Cyberloafing is the voluntary acts of individuals using their companies’ Internet access for non-work related purposes during working hours. This study examines the impact of sleep deprivation on cyberloafing as measured objectively by time spent by individuals on non-work-related-computing. More specifically, we investigated the effect of individuals’ bed time and wake time after sleep onset (WASO) on time spent on cyberloafing. In general, individuals’ bed time and WASO significantly predict the time spent on cyberloafing. We also examined the moderating effect of extroversion on the relationship between time-to-bed and time spent on cyberloafing (supported); and the moderating effect of neuroticism on the relationship between WASO and time spent on cyberloafing (not supported). Implications of our findings are discussed.