Prior research has highlighted the importance of educational achievement throughout school in predicting subsequent progression to higher education in England. However, progress assessments may not only demonstrate students’ prior academic achievement but also influence their future achievement. I compare students who have received different grades on one such assessment, despite performing almost identically, to see whether grade labels influence their progress to post-compulsory education. Further, I investigate whether any impact differs according to socio-economic status. Results indicate that grade labels received in eighth grade influence students’ performance in school-leaving exams and enrollment in post-compulsory schooling. For lower socio-economic students, this impact is higher than for other students and extends to university enrollment.