This report examines the ways in which socioeconomic (SE) factors affect educational disadvantage. As a starting-point SE could be understood as a set of structural factors that influence education and could cause disadvantages for groups of children, youths and adults. Since socioeconomic disadvantage (SED) is a very complex concept, we will present a more extensive working definition. Official perceptions of SED as well as research perspectives will be discussed. SED has intersectional dimensions and these are explored.