This paper analyzes the evolution of return rates of tertiary education in Chile using differences-in-differences estimation. The study seeks to establish the impact of these rates on social mobility using cross-sectional data obtained from the national socioeconomic characterization survey (Casen) for the periods 2003 to 2009 and 2006 to 2011. This study provides new evidence by confirming that salaries plus the level of education of people could explain a change in the social stratification of individuals. For the period 2003 to 2009, the internal return rate of higher education is positive. However, no real improvement in income is observed of a person who decided to study in the period 2006-2011.