UPSC Prelims Syllabus 2026: Subject-Wise GS + CSAT + PDF

The UPSC Prelims syllabus covers two objective papers — General Studies Paper 1 (100 questions, 200 marks) and CSAT Paper 2 (80 questions, 200 marks) — each of two hours, with a 1/3rd negative-marking penalty. GS Paper 1 is the merit-deciding paper testing Current Affairs, History, Geography, Polity, Economy, Environment, Science & Technology and Art & Culture; CSAT is only qualifying and needs just 33% (66 marks) to clear. This guide gives you the complete, subject-wise syllabus for both papers, the exam pattern with marks, PYQ-based weightage, expected cut-off, a topic-to-book map, a printable checklist and a downloadable PDF so you can plan your preparation end to end.

Sourcing note: the topic wording below follows the official UPSC Civil Services Examination notification. UPSC has kept this structure unchanged for years; always cross-check the exact lines against the current-year notification on upsc.gov.in when it is released. Last reviewed for the 2026 cycle.

UPSC Prelims Syllabus 2026: Quick Facts

The Preliminary Examination is the first of three stages of the UPSC Civil Services Examination (CSE), followed by the Mains and the Personality Test (Interview). It is a screening test — marks scored in Prelims are not counted in the final merit; they only decide who qualifies for Mains. Roughly 5–6 lakh candidates appear and only about 13–14 times the number of vacancies are shortlisted for Mains, which is why a razor-sharp command of the syllabus matters.

The upsc prelims syllabus 2026 has not changed structurally for years, so aspirants can safely begin now using the standard notification pattern. Any minor wording change appears only in the official notification, which we recommend cross-checking on upsc.gov.in when released.

UPSC Prelims Exam Pattern and Syllabus

Before diving into topics, understand the upsc prelims exam pattern and syllabus together, because your strategy flows from how the marks are structured. Two papers are conducted on the same day — GS Paper 1 in the morning and CSAT Paper 2 in the afternoon.

Key rules every aspirant must internalise:

• Negative marking: Each wrong answer deducts one-third (0.33) of the marks assigned to that question. In GS Paper 1, each question carries 2 marks, so a wrong answer costs 0.66 marks. There is no penalty for questions left blank.
• CSAT is qualifying only: You must score a minimum of 33% i.e. 66 out of 200 marks in CSAT to have your GS Paper 1 evaluated. Fail CSAT and your GS score becomes irrelevant.
• Cut-off is decided by GS Paper 1 alone. Because CSAT is pass/fail, all your ranking effort should target GS Paper 1 — but never neglect CSAT.
• Blank vs guess: Because of negative marking, a smart educated guess (eliminating 2 options) is usually worth it, but blind guessing damages your score.

Is there negative marking in UPSC Prelims?

Yes. UPSC deducts one-third of the marks allotted to a question for every incorrect answer in both papers. This makes accuracy and intelligent elimination as important as knowledge. Multiple markings on the OMR are also treated as wrong even if one is correct.

UPSC Prelims GS Paper 1 Syllabus (Subject-Wise)

This is the heart of the upsc prelims gs paper 1 syllabus. The official notification lists seven broad areas, but for planning we break them into eight teachable subjects. Here is the exact official language, expanded subject-wise so nothing is missed.

Current Affairs & National/International Events

Current affairs is the glue that binds every subject in Prelims — UPSC increasingly asks static topics through a current-events trigger. Cover government schemes, budget and economic survey highlights, international summits and organisations, awards, sports, defence exercises, science breakthroughs, environment reports (IPCC, State of Forest), and constitutional/legal developments. A window of roughly the last 12–15 months before the exam is the sweet spot. A reliable monthly compilation such as the Vision IAS Current Affairs Magazine (January 2026) plus daily newspaper reading keeps this manageable.

History — Ancient, Medieval, Modern & National Movement

History splits into three eras plus the freedom struggle. Ancient India (Indus Valley, Vedic age, Mauryas, Guptas), Medieval India (Delhi Sultanate, Mughals, Bhakti-Sufi movements, Vijayanagara), and Modern India (British expansion, socio-religious reforms, 1857 revolt). The Indian National Movement (1885–1947) is the most heavily asked segment — Congress sessions, Gandhian movements, revolutionary activities, and key personalities. Focus your energy on Modern History and the National Movement, which yield the most questions.

Geography — Indian, World & Physical

Cover Physical Geography (geomorphology, climatology, oceanography), Indian Geography (rivers, soils, monsoon, agriculture, minerals, industries), and World Geography (continents, important regions, resource distribution). Map-based questions are common, so keep an atlas handy. Link geography with current events — volcanoes in the news, straits, cyclones and their tracks.

Indian Polity & Governance

One of the highest-yielding and most static subjects: the Constitution (features, Preamble, Fundamental Rights, DPSP, Fundamental Duties), Union and State executive/legislature, judiciary, federalism, Panchayati Raj, constitutional and non-constitutional bodies, and governance/public policy. Because facts here rarely change, Polity is where disciplined aspirants score the most reliably.

Economic and Social Development

Covers basic macroeconomics (national income, inflation, banking, fiscal and monetary policy), Indian economy (planning, budgeting, taxation, GST), social-sector schemes, poverty, unemployment, demographics and sustainable development. Blend static concepts with current data from the Economic Survey and Budget.

Environment & Ecology

Environment has become one of the biggest scorers, often 15–20 questions. Study ecosystems, biodiversity, protected areas (national parks, biosphere reserves, Ramsar sites), climate change, pollution, environmental conventions and institutions, and species in the news. It overlaps heavily with current affairs and geography.

General Science & Technology

Includes fundamentals of physics, chemistry and biology (NCERT level) plus applied science & technology in the news — space missions (ISRO), defence tech, biotechnology, health (diseases, vaccines), and emerging tech (AI, semiconductors). The trend is application- and current-affairs-driven rather than rote theory.

Art & Culture

Though embedded within History in the official syllabus, Art & Culture deserves separate attention: architecture (temple styles, stupas), classical dances, music, painting, literature, festivals, and UNESCO heritage/GI-tag items. Questions are increasingly cultural-current-affairs based.

UPSC Prelims Syllabus Subject-Wise Weightage (PYQ Analysis)

Understanding the upsc prelims syllabus subject wise weightage tells you where to invest time. The table below shows the approximate number of GS Paper 1 questions per subject based on the last 6–8 years of papers. Exact numbers vary year to year, but the trend is stable enough to prioritise your preparation.

The takeaway: Polity, Environment, Economy and Current Affairs together account for over half the paper. Master these four for the best return on effort, then round out History, Geography, Science and Culture.

Which subjects have the highest weightage in UPSC Prelims?

Environment & Ecology, Polity & Governance, Economy and integrated Current Affairs consistently carry the highest weightage in GS Paper 1 — frequently 15–20 questions each in recent years. History and Geography follow closely. Prioritising these dynamic, high-frequency areas is the smartest way to cross the cut-off.

Expected Cut-Off & How Many Questions to Attempt

Knowing the syllabus is only useful if you also know the target. Because GS Paper 1 alone decides who clears, aspirants plan attempts around the expected cut-off. The figures below are indicative ranges from recent years (General category) — UPSC releases the actual cut-off only after the final result, and it moves with paper difficulty.

In attempt terms, a General-category aspirant usually needs to answer around 90–95 questions correctly-adjusted for negatives, which typically means attempting 80–90 questions with high accuracy. Reckless attempts beyond your confidence zone erode marks through negative marking, so accuracy beats volume.

How many questions should I attempt in UPSC Prelims?

There is no fixed number, but most successful candidates attempt roughly 80–90 of the 100 GS Paper 1 questions — marking those they are sure of plus educated guesses where they can eliminate two options. Aim for high accuracy rather than a high attempt count, because each wrong answer costs 0.66 marks. Skip questions where you cannot eliminate at least two options.

CSAT Syllabus for UPSC Prelims (Paper 2)

The csat syllabus for upsc prelims tests aptitude rather than static knowledge. Since 2015 it has been qualifying, but the 2023 and 2024 papers were notably tougher — especially the maths and reasoning sections — causing thousands of aspirants who ignored CSAT to fail. Treat it seriously. The official CSAT topics are:

Note: Decision-making questions typically carry no negative marking. The comprehension passages dominate the paper, so building reading speed in English is the single biggest CSAT lever. A structured resource like the Vajiram CSAT Complete Booklet Set with practice questions plus a dedicated Vision IAS CSAT Test Series is enough for most aspirants to comfortably clear 66 marks.

Why aspirants fail CSAT — and how to avoid it

The main reasons are: (1) treating CSAT as an afterthought and not practising, (2) weak reading speed for dense comprehension passages, and (3) rusty Class X maths and reasoning. Given the tougher 2023–24 trend, solve at least 8–10 full CSAT mocks before the exam, revise basic quantitative aptitude formulas, and practise DI under time pressure. Even a modest 30–40 hours over your prep cycle usually secures the qualifying mark.

What are the qualifying marks for CSAT in UPSC Prelims?

You need a minimum of 33%, i.e. 66 out of 200 marks, in CSAT Paper 2. Score below this and your GS Paper 1 is not evaluated, regardless of how well you did in it.

Topic-to-Book Map: Official Syllabus Meets the Right Resource

Most syllabus pages list topics but never tell you which book covers each line. Here is a subject-to-resource map pairing the standard NCERT/reference books with curated study material, so every syllabus line has a home.

If you prefer one consolidated source instead of assembling books subject by subject, a complete printed set such as the Vision IAS GS 2026-27 Booklets (56 booklets with value-added material) or the Drishti IAS English Study Material (27 booklets) covers the entire GS Paper 1 syllabus in one go, saving weeks of resource-hunting.

Which books should I read for the UPSC Prelims syllabus?

Start with NCERTs (Class 6–12) for every subject, then add standard references: Laxmikanth (Polity), Spectrum (Modern History), Ramesh Singh (Economy), G.C. Leong (Geography) and Shankar IAS (Environment). Supplement with a monthly current affairs magazine and topic-wise PYQs. Coaching booklet sets can replace multiple books if you want a single, exam-focused source.

Printable UPSC Prelims Syllabus Checklist (Tick-Box Tracker)

Use this revision-friendly checklist to track coverage. Print it, tick each micro-topic as you finish the first read, and re-tick during revision rounds — a simple system that beats vague “I’ll study Polity” planning.

Most-Repeated / High-Probability Topics from PYQs

Analysing past papers reveals topics UPSC returns to again and again. Weight these heavily in revision:

• Polity: Fundamental Rights vs DPSP, constitutional amendments, powers of President/Governor, functions of constitutional bodies.
• Environment: Wetlands/Ramsar sites, protected-area categories, environmental conventions (CITES, CBD, Ramsar), carbon markets.
• Economy: Types of inflation, monetary policy tools, money supply, GDP concepts, government schemes.
• Geography: Straits and their locations, ocean currents, monsoon mechanism, mineral belts.
• Science: Space missions, disease-causing pathogens, biotech applications, everyday chemistry.
• Current Affairs: Newly launched schemes, indices & reports, international groupings (QUAD, BRICS, SCO).

Solving topic-wise PYQs from a compilation like the Forum IAS Prelims Toolkit (1992–2025) trains you to spot these recurring patterns and eliminate wrong options faster.

UPSC Prelims Syllabus PDF Download

For offline planning, save the complete syllabus. A concise, printable upsc prelims syllabus pdf download should include: the exam pattern table, the seven official GS areas, the six CSAT topics, and the subject-wise checklist above. You can copy the tables from this page into a document, or opt for a ready-made printed syllabus booklet such as the GS Score Latest Syllabus Booklet 2026-27, which lays out the full Prelims + Mains syllabus in exam-ready format — handy to keep on your study desk and tick off as you progress.

How to Cover Each Topic: A Resource-Linked Strategy

Knowing the syllabus is half the battle; sequencing it is the other half. A proven approach:

• Build the base (NCERTs): Read Class 6–12 NCERTs subject-wise before touching advanced material. They anchor concepts and appear directly in questions.
• Layer standard references: Move to Laxmikanth, Spectrum, Shankar IAS, etc., one subject at a time. Finish a subject before starting the next.
• Integrate current affairs daily: Read one newspaper (The Hindu / Indian Express) plus a monthly magazine; link every news item back to its static topic.
• Revise using the checklist: Aim for at least three revision rounds. Retention, not first-time reading, clears Prelims.
• Test relentlessly: From roughly 3–4 months out, attempt weekly full-length mocks. Analyse every mock — the elimination skill you build in tests often adds 15–20 marks. A structured programme like the Vision IAS Prelims Test Series 2026 mirrors the actual difficulty and helps you master time management.

Is 2 months enough to prepare for UPSC Prelims?

Two months can be enough only if you already have a strong foundation and are in the revision-plus-mocks phase. For a fresher, UPSC Prelims realistically needs 8–12 months of structured study to cover the vast syllabus, revise multiple times and practise enough mocks. If you have just two months, focus entirely on revision, high-weightage subjects (Polity, Environment, Economy, Current Affairs) and daily mock tests rather than fresh reading.

Recommended Newspapers, Magazines & Sources

Current affairs makes or breaks Prelims, so lock in reliable sources early:

To make revision efficient, pair daily reading with a curated monthly compilation. The Vision IAS Current Affairs Magazine (December 2025) and the January 2026 edition together cover the crucial pre-exam window, filtering thousands of news items down to what UPSC actually asks.

Common Mistakes to Avoid

• Ignoring CSAT until the last month — the tougher 2023–24 trend has ended many attempts.
• Hoarding resources instead of revising a limited set multiple times.
• Skipping PYQs — past papers reveal exactly how UPSC frames questions.
• Neglecting revision and mocks in favour of endless first-time reading.
• Reckless guessing that inflates negative marks. Guess only after eliminating options.

Avoid these five and you already outperform a large share of the applicant pool.

Frequently Asked Questions

What is the syllabus for UPSC Prelims?

The UPSC Prelims syllabus has two papers. GS Paper 1 covers Current Affairs, History, Geography, Polity & Governance, Economy & Social Development, Environment & Ecology, General Science and Art & Culture. CSAT Paper 2 covers Comprehension, Interpersonal & communication skills, Logical reasoning & analytical ability, Decision-making, General mental ability and Basic numeracy & Data Interpretation at Class X level.

Is CSAT included in UPSC Prelims syllabus?

Yes. CSAT is Paper 2 of UPSC Prelims and is very much part of the syllabus. However, it is only qualifying — you need 33% (66 marks) to pass it, and its marks are not counted for the merit/cut-off, which is decided solely by GS Paper 1.

How many papers are there in UPSC Prelims?

There are two papers — General Studies Paper 1 (100 questions, 200 marks) and CSAT Paper 2 (80 questions, 200 marks). Both are objective, of two hours each, conducted on the same day.

What are the qualifying marks for CSAT in UPSC Prelims?

You must score a minimum of 33%, i.e. 66 out of 200 marks, in CSAT to qualify. If you fall short, your GS Paper 1 answer sheet is not evaluated at all.

Is there negative marking in UPSC Prelims?

Yes, both papers have negative marking of one-third (0.33) of the marks assigned to a question for each wrong answer. There is no penalty for unattempted questions, and certain CSAT decision-making questions carry no negative marking.

How is the UPSC Prelims syllabus different from the Mains syllabus?

The Prelims syllabus is objective and broad-but-shallow, testing factual recall and elimination across GS and aptitude in two MCQ papers used only for screening. The Mains syllabus is descriptive and deeper, with nine written papers (Essay, four GS papers, two optional-subject papers and two qualifying language papers) whose marks count toward the final merit. Prelims tests recognition; Mains tests analysis and articulation.

Which books should I read for the UPSC Prelims syllabus?

Begin with NCERTs (Class 6–12), then add Laxmikanth (Polity), Spectrum (Modern History), Ramesh Singh (Economy), G.C. Leong (Geography) and Shankar IAS (Environment), plus a monthly current affairs magazine and topic-wise PYQs. A single coaching booklet set can consolidate all subjects if you prefer one exam-focused source.

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