This study concerns balance in exchange relationships as described in the psychological contract literature about employees’ and employers’ promises and fulfilment of these promises. Balance is investigated, firstly, in relation to temporary versus permanent employment and, secondly, in relation to employees’ attitudes (fairness, job satisfaction, and intention to quit). Analyses were based on a Dutch sample of 290 temporary and 489 permanent workers. Regarding balance in mutual promises, we found that temporary workers were more likely to have psychological contracts with few mutual promises than permanent workers, while permanent workers were more likely to have psychological contracts with many mutual promises compared to temporary workers. Regarding balance in the fulfilment of promises, we found the opposite pattern, namely, that fulfilment was higher in temporary workers compared to permanent workers. Furthermore, only mutual high fulfilment of promises was associated with higher job satisfaction and fairness and with lower intentions to quit.