UPSC Prelims syllabus — GS Paper I and CSAT in detail

GS Paper I — official syllabus and concrete sources

The official syllabus has seven heads. Each maps to a small set of widely-used standard sources that have stood the test of two decades.

• Current events of national and international importance — daily newspaper (The Hindu or Indian Express), one monthly compilation, environment and economy threads tracked across the year.
• History of India and the Indian National Movement — NCERT Class 11 and 12 (Themes in Indian History), Spectrum's "A Brief History of Modern India", Bipan Chandra for selected chapters.
• Indian and World Geography (physical, social, economic) — NCERT Class 11 and 12 (Fundamentals of Physical Geography, India — Physical Environment, Human Geography), G.C. Leong for physical geography depth, Oxford or Orient Blackswan atlas.
• Indian Polity and Governance — Laxmikanth's "Indian Polity" cover to cover, supplemented by PRS India for ongoing bills and amendments.
• Economic and Social Development — NCERT Class 11 and 12 Economics, Sanjeev Verma or Ramesh Singh as a single-volume reference, Economic Survey and Budget highlights.
• Environment, Biodiversity, Climate Change — Shankar IAS Environment book, India State of Forest Report headlines, UNFCCC and CBD basics.
• General Science — NCERT Class 6 to 10 Science, current science and technology developments from newspapers.

How the question distribution actually splits

Although the syllabus does not weight subjects, the realised question distribution over the last decade is fairly stable. Use it for time budgeting, not for skipping topics.

• Polity: 12–18 questions per paper.
• History (ancient + medieval + modern): 12–18 questions.
• Geography (physical + Indian + world + mapping): 10–15 questions.
• Economy: 10–14 questions, weighted to current developments.
• Environment and Ecology: 12–18 questions, rising trend.
• Science and Technology: 8–12 questions, heavily current-affairs-linked.
• Current affairs (cross-cutting): 15–25 questions, distributed across all of the above.

CSAT Paper II — syllabus and what to actually study

The CSAT syllabus has six heads. In practice, three of them — comprehension, logical reasoning, and basic numeracy — produce nearly all the questions. The other three are rare and you do not need dedicated material for them.

• Comprehension — daily passage practice from RC Verbal Ability books or actual CSAT PYQs.
• Logical reasoning and analytical ability — RS Aggarwal Verbal and Non-Verbal Reasoning, or any equivalent.
• Basic numeracy (Class X level) — arithmetic, percentages, ratios, time-speed-distance, simple data interpretation.
• Data interpretation — tables, line graphs, bar charts, pie charts.
• Decision making and problem solving — usually picked up via PYQs; no separate book needed.
• General mental ability — overlaps with reasoning; covered by the same material.

How to read the syllabus operationally

Print the official syllabus and stick it where you study. Every week, mark off the sub-topics you have covered. Re-read the official document once a month — you will notice that the gap between what you have studied and what the syllabus demands shifts your priorities for the next week. Aspirants who lose direction usually stopped going back to the official document at all.

Frequently Asked Questions

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