Career variety has recently received attention in management literature in general, and top management literature in particular. While existing publications have predominantly linked career variety to individual adaptability, agility or competences, this paper focuses on the relationship between top managers’ career variety and their tenure on the board. We rely on the boundaryless career approach and argue that there is a negative relationship between career variety and board tenure. Drawing on a sample of executive directors in UK FT 100 firms, we provide empirical evidence that increased career variety leads to shorter tenure on the board. We also reveal that this relationship is further strengthened with international educational experience. In addition, we show that in-house work experience mitigates the negative association between career variety and board tenure. We contribute to the literature on top managers’ careers by unravelling the consequences that career variety during early and mid-stages of a career has on tenure on the board – and hence on career stability in later stages of a career.