A central claim in the insider-outsider literature is that the representation of labour market outsiders, aka precarious workers, entails scarce electoral benefits for political parties, due to their small number and low political engagement. The incidence of occupational precariousness, however, rose sharply in Western Europe over the past decade; has this rendered the representation of outsiders electorally beneficial? In the article, I address this question by examining the relationship between occupational precariousness and voting in the 2018 Italian election, when a pro-outsider policy stood at the forefront of the electoral campaign of the Five Star Movement. I find that subjective perceptions of precariousness, rather than formal employment status, influenced vote choice by increasing the probability to vote and to support the Five Star Movement, and that the electoral relevance of outsiders has outgrown the relevance of secure workers. These results indicate that outsiders can be effectively mobilized via targeted economic policies and that their representation is today electorally beneficial, thus challenging consolidated assumptions about outsiders' low turnout rate, difficult mobilization, and consequent political irrelevance. Considering the socially transformative power of disseminating evidence that exposes the electoral benefits entailed in the representation of an economically and politically marginalized group, these results entail societal and political, besides theoretical, implications.