The purpose of this research is to analyze the different factors that determine the level of time devoted to volunteer activity involving employed people. To this end, we applied a logistic regression model to a sample of 5,067 employees, considering four categories of factors: family and personal, on the one hand, and contextual factors, on the other. This second group involves three factor categories: occupational, organizational, and community involvement factors. The findings of this work are especially relevant to two areas: first, to design a policy of corporate social responsibility that effectively integrates the figure of corporate volunteering, considering its pertinent factors; and second, to broaden the perspective of the third‐sector organizations beyond the traditional profile with which volunteers are commonly associated.