Socioeconomic status (SES) of the family has an impact on the various achievements of individuals; from educational achievement, job selection to social status. In addition to the SES of the family, the educational achievement of individuals is influenced by a number of other genetic, social and environmental factors. Based on the analysis of the research that has already been presented in the literature, that is conducted in the world and Croatia, this paper aims to explain to what extent the SES of the family is a factor in an individual's educational achievement. The research presented relates to the SES of families and its impact on pre-school, primary, secondary and academic education. The factor SES of the family was taken as the most important predictor of research, which affects educational achievement in order to inspire the results of previous research, encourage the reduction of social inequalities in access to education and school success, and further affect future employment according to needs labor markets. The results of research in Croatia and the world provide an interesting and unique insight into the impact of the SES factor on the education system, education and achievements of individuals, and mutually confirm a similar or equal structure of impact with some deviations. The conclusion of this paper is that SES directly or indirectly according of many researches, irresistibly affectingevery stage of education achievement. This paper presents important insights and opens opportunities for further study and research to develop new school policies and reforms that would provide equal opportunities for educational achievements of individuals.