Essential reports and commissions for UPSC aspirants include the 7th Pay Commission, National Education Policy, and various Economic Surveys. Familiarity with the Mandal Commission report and Sachar Committee Report offers insights into social justice and minority issues. Understanding the outcomes of the Rangarajan Committee can shed light on poverty assessment methods. Awareness of historical commissions and reports helps candidates grasp evolving policies and can enhance answers during exams, especially in sociology or polity-related topics.