This chapter addresses the logic of participation in far-right movement parties, examining decision-making processes and the level of intra-organizational democracy. Far-right collective actors often combine informal processes with top-down decision-making. The chapter therefore considers whether protest activity is linked to more or less formal ways to aggregate interests, the availability of participatory practices empowering grassroots activists, and the leadership models adopted by far-right collective actors. Triangulating original interviews with statutory and other data sources, the chapter challenges the notion that heightened protest mobilization stems from bottom-up processes and the empowerment of rank-and-file activists. Instead, protest mobilization tends to occur more frequently in far-right movement parties in which informal, top-down structures, rather than bottom-up, horizontal practices are in place.