Family business succession is considered inherent to family businesses and represents a critical process that is generally characterised by resistance to change. This study aims to investigate the role of management accounting systems (MASs) in family business succession, in order to understand how changes in MASs during the succession across different family generations can help the succession process itself, facilitating the rise of the new leader, supporting changes, and reducing resistance to them. The research adopts a case study approach, focusing on organizational routines and their changes, at the same time taking into account the socioemotional wealth of the family firm. Evidence from the study shows the strategic role of MAS in managing the succession process, through the implementation of new routines and rules in helping the decision-making process and in achieving the firm's leadership.