The aim of this paper is to provide an objective overview of the impact of teacher salaries on the educational achievements of students. It is often debated about teacher salaries and improvement or jeopardizing their standard, but educational consequences that may ensue as a result of these intentions are rarely addressed. Teacher's role in student's achievement outcomes is unquestionable. There are many factors that have an impact on student achievement, but this paper will analyze only the impact of teacher's income on student's achievement. A hypothesis for further study has been set by collecting and analyzing pedagogical documentation on teacher salaries and student's educational achievements. Qualitative approach to statistical results of PISA study published in 2013 analyzes following categories: reading, mathematics and science, student's sense of belonging to school and student's personal opinion on does school prepare them for adult life. The study of these elements in selected countries gives us a concrete insight into their interrelationship. The comparative analysis compared the educational achievements of students with the level of teacher's salaries in the following countries: Canada, Denmark, France, Germany, Israel, Japan, Norway, South Korea, Spain and Switzerland. The results of the research show that the level of teacher's income has an impact on student's achievements. The paper confirms the facts that the teaching profession is more popular as incomes increase and therefore attracts more motivated and skilled individuals.