ABSTRACT Lately, municipalities in Western democracies have become increasingly more participatory. Local councillors have a fundamental role therein as they can either enable or block citizen participation. In that vein, their legitimacy perceptions towards different participatory arrangements seem key. This article analyses to what extent instrumental motivations steer these attitudes. Specifically, we distinguish between collective power (belonging to the governing majority or not) and individual influence (level of self-perceived political efficacy) as explanatory variables. Results based on a large-scale survey among local councillors in Flanders (Belgium) show that instrumental motivations indeed play a significant role: councillors with high levels of influence perceive traditional forms of decision-making (classic decision-making and consultative participation) as more legitimate. At the same time, majority councillors evaluate decisive forms of citizen participation as less legitimate than their colleagues in opposition. Additionally, feeling more powerful seems to be linked with an overall enthusiasm irrespective of participatory designs.