UPSC Prelims Syllabus: Complete Subject-Wise Guide

Fact: The Preliminary Examination consists of two compulsory papers — General Studies Paper I and General Studies Paper II (CSAT) — of 200 marks each, conducted on the same day in two sessions.

Fact: Both papers have objective-type multiple-choice questions with negative marking (generally one-third of the marks assigned to a question) for incorrect answers. Marks in GS Paper I determine the Prelims cut-off; CSAT is qualifying in nature.

For aspirants, this means you must treat GS Paper I as your main scoring paper and CSAT as a paper you cannot afford to fail. Subject-wise planning for each paper is essential to balance accuracy, speed, and coverage.

Fact: GS Paper I syllabus includes — current events of national and international importance; history of India and Indian National Movement; Indian and World Geography; Indian Polity and Governance; Economic and Social Development; Environmental ecology, biodiversity and climate change (general issues); and General Science.

In practice, this breaks into six broad subject baskets: (1) Current Affairs, (2) History and Culture, (3) Geography, (4) Polity and Governance, (5) Economy and Social Development, and (6) Environment and Science & Tech. Each basket requires a mix of static sources (like NCERTs and standard reference books) and dynamic sources (like newspapers and yearly current-affairs compilations).

A smart plan is to pair subjects that naturally connect — for example, studying Environment with Geography, or Polity with Governance and current policy debates. This keeps revision cycles compact and helps you see patterns in previous year questions.

Fact: The CSAT syllabus includes comprehension; interpersonal skills including communication skills; logical reasoning and analytical ability; decision-making and problem solving; general mental ability; basic numeracy and data interpretation (class X level).

Fact: CSAT is qualifying — candidates must secure at least 33% marks to have their GS Paper I score considered for the Prelims result.

For many aspirants from non-mathematics backgrounds, CSAT can become a risk if ignored. Regular practice of comprehension sets, reasoning questions, and basic numeracy — especially percentages, ratios, averages, and data interpretation — keeps you comfortably above the qualifying threshold.

Fact: „Current events of national and international importance” is a clearly stated component of the GS Paper I syllabus, and current affairs questions are often linked to polity, economy, environment, and international relations.

Practically, this means current affairs is not a separate subject but a lens through which UPSC tests several syllabus areas. For example, a question on a new environmental convention may test environment and geography; a question on a recent scheme may test polity and social sector understanding.

A practical approach is to maintain monthly notes from reliable newspapers and magazines, organising information under syllabus headings (polity, economy, environment, etc.). This structure ensures that current affairs revision also reinforces static concepts.

Fact: The official Prelims syllabus is short but dense; each phrase like „Indian and World Geography” or „Economic and Social Development” covers a large number of textbook chapters and issues.

To plan your day, convert the one-line syllabus into concrete topics — for example, break „Indian Polity and Governance” into Constitution, Fundamental Rights, Parliament, Federalism, Local Government, and Schemes. Then map each topic to specific NCERT chapters, reference books, and PYQs.

PrepiQ Institute mentors often help students build such topic-wise matrices so that every study session is clearly linked to an official syllabus line. This makes revision more focused and prevents you from getting lost in too many sources.