Research on customer relationship management (CRM) in general has focused on the effects of customer satisfaction with CRM, customer retention and profit management, and the effects of CRM technique on performance. Conceptually, however, a sequence of effects of CRM is expected, from CRM implementation to financial performance, but this sequence has not been explored. Whilst several definitions of CRM have been proposed, this article defines CRM as relationship-development programmes based on IT. CRM is regarded as the integration of relationship technology (i.e. data consolidating and data mining) with loyalty schemes. Survey research was conducted in Japan in the retail and service industries to test three hypotheses: (1) a firm's relationship orientation has a positive effect on CRM implementation (data warehousing, data mining, using customer data for decision making); (2) CRM implementation has a positive effect on return on equity; and (3) CRM implementation has an indirect effect on return on equity, mediated by customisation. Using a structural equation model the first hypothesis was supported, but the third hypothesis was only partially supported. In these analyses a direct effect of CRM implementation on return on equity (ROE) was supported; however, a negative impact of customisation on ROE was found.