It is imperative that all organisations should become sustainable over the long-run, but many are not familiar with these practices and the impact thereof. Various efforts have been made to develop business sustainability measures but their effectiveness and influence remain limited. The aim of this study is to develop a comprehensive Business Sustainability Index (BSI) for organisations to benchmark, measure and monitor the magnitude and impact of its sustainable business practices. A questionnaire was developed to measure 20 possible dimensions of business sustainability. Data obtained from norwegian businesses was analysed and resulted in a17- dimensional factor solution providing empirical support for a valid and reliable second-order construct of a BSI based upon a triple bottom line (TBL) approach.