In this paper I examine the relationship between expatriates' perceptions of their compensation package and their affective commitment. The results of this cross-sectional study amongst 263 Finnish expatriates suggest the mediating role of the employee's perceptions of fulfillment of their employer obligations. This leads to the consideration that employees systematically assess their total reward package, interpret and give meaning to these compensation signals in terms of fulfillment of perceived employer obligations and simultaneously re-adapt or adjust their attitudes at any moment thorough their exchange relationship. In addition, this study gives empirical support for some of Rousseau and Ho's (2000) theoretical arguments regarding psychological contract (PC) issues in compensation. Furthermore it provides evidence that three of the PC feature measures for employer obligations developed by Janssens, Sels and Van den Brande (2003) can be replicated. Finally the implications of these findings for future research are discussed.