Over the past few decades, the number of flexible workers has increased, a situation that has captured researchers’ attention. Traditionally, temporary workers were portrayed as being disadvantaged compared to permanent workers. But in the new era, temporary workers cannot be treated as a homogeneous group. This study distinguishes between four types of temporaries based on their contract preference and employability level. Furthermore, it compares them with a permanent group. Whether these groups differ on job insecurity and health-related outcomes in a sample of 383 Spanish employees was tested. Differences in well-being and life satisfaction were found, and the hypotheses were supported. The results point out that the temporary workforce is diverse. Therefore, in order to attain a better understanding of the experiences and situations of these workers, it is preferable not to consider them as one homogeneous group.