Time theft – time that employees waste or spend not working during their scheduled work hours – poses serious costs to many employers. Although previous research has suggested the importance of social norms for understanding time theft behavior, experimental studies are lacking. This paper presents the results of two preregistered experiments that examined if information about whether most people engage in time theft or not (descriptive norms) has effects on intentions and attitudes to steal time at work. The results confirmed that people are less willing to conduct time theft if they are led to believe that others avoid such behaviors (Experiment 1, N = 170). However, the same norm information did not alter people’s moral judgments of coworkers who engage in time theft (Experiment 2, N = 183). The findings tentatively suggest that the less time theft employees see, the less time theft they will commit.