This article explores the influence that an organisation’s corporate values have on employees’ behaviour and values both within and outside the work environment. In particular, it focuses on the impact of these values on the personal buying behaviour of employees. The empirical research was undertaken within a case study organisation that produces wine in Spain and involved interviews with senior management, an analysis of company documentation, as well as group discussions with employees supported by an employee survey. The article argues that an organisation’s corporate values influence not only its employees’ behaviour within the work environment, but also impacts on their global values system outside of the work environment. In particular, this was evident within the employees’ buying behaviour practices in relation to supplier loyalty and environmental concern. This has implications for business ethics as an organisation’s value system may go beyond the purely business context. Organisations need to be aware of their impact on employees’ behaviour outside of the work environment; this is particularly the case for multinational companies working across many cultures.