With the acceleration of globalization, the role of education in economic and social development has become increasingly prominent. The SAT, as a measure of students' learning ability and potential achievement, has gained widespread attention and recognition around the world, and SAT scores, as an important indicator of students' academic performance, have a significant impact on students' future development and income levels. Previous research on the SAT has focused on factors that can influence SAT scores, such as family socioeconomic factors and high school academic performance, but there is a lack of research on whether SAT scores are effective in predicting an individual's future income level. In this paper, a correlation analysis was conducted using the questionnaire method and Pearson's coefficient, using data on the job position level and SAT scores of employees of Company A with a confidentiality agreement. The results show a significant positive correlation between SAT scores and future incomes. This finding emphasizes the importance of academic performance in high school to an individual's long-term economic prospects, enriches existing research, and provides new perspectives on return on investment analysis in higher education with theoretical implications. In addition, educational policymakers can thus focus more on improving students' SAT scores, which is of practical significance.