Using data on all businesses started by mothers of young children in Sweden between 2000 and 2014, we explore which factors are associated with entrepreneurship among mothers. We find that being unemployed or being an immigrant is positively associated with business start-up by mothers; however, our findings show that what matters more is the paternity leave taken by the mothers’ partners. These findings suggest that in institutional contexts such as Sweden, gender inequality is not a persistent feature of most households and that women can make career choices by negotiating with their partners who will make use of the parental benefits offered by the government.