The cut-off marking system in the UPSC exam refers to the minimum score required for candidates to qualify for the next stage of the selection process. Cut-off marks are determined based on various factors, including the number of vacancies, difficulties of the exam, and overall performance of candidates. Each stage—Prelims, Mains, and the Interview—has its own cut-off, which is released alongside the results. Understanding this system assists aspirants in setting realistic goals.