This paper aims to determine the effect of parental education, as an important measure of social origin, on the expectations of 15 year olds to complete higher education in the Netherlands. More importantly, the paper tests specific explanations for this effect. For the empirical analysis, Dutch data from the PISA 2018 survey were used. The results revealed that there is a considerable impact of parental education on the likelihood of expecting to complete higher education in the Netherlands. To a large extent, this social origin effect refers to secondary effects of stratification: students with the same school performance have different expectations regarding higher education that are strongly correlated with their social origin. Parental resources explain only a small part of the direct social origin effect net of school performance. The secondary effects remain largely unexplained after taking parents' economic, cultural and educational resources into account, suggesting that relative risk aversion drives social differentials in educational expectations.