The UPSC Civil Services Examination (CSE) is India's gateway to prestigious services like IAS, IPS, and IFS — and one of the most competitive exams in the world. Before you open a single book, you need absolute clarity on the UPSC CSE syllabus. This guide breaks down the Prelims and Mains syllabus in full detail, along with the exam pattern, marking scheme, and optional subjects, so you can plan your preparation the right way from day one.
UPSC CSE Exam Pattern: Quick Overview
The Civil Services Examination is conducted in three stages:
| Stage | Type | Papers | Total Marks |
|---|---|---|---|
| Prelims | Objective (MCQ) | 2 | 400 (screening only) |
| Mains | Descriptive (Written) | 9 | 1,750 |
| Interview | Personality Test | — | 275 |
Important: Prelims marks are used only to screen candidates for Mains — they are not counted in the final merit list. Your rank is decided purely by your Mains score (1,750 marks) plus Interview score (275 marks), for a total of 2,025 marks.
UPSC Prelims Syllabus 2026
The Preliminary Examination consists of two compulsory papers held on the same day, both objective type with negative marking.
Paper I: General Studies (GS Paper I) — 200 Marks
- 100 questions, 2 marks each, 2-hour duration
- Counts toward the Prelims cutoff
- Negative marking: 1/3rd mark deducted for every wrong answer
Detailed topic-wise syllabus:
- Current events of national and international importance
- History of India and Indian National Movement
- Ancient, Medieval, and Modern Indian history
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- Freedom struggle, key movements, and personalities
- Indian and World Geography (Physical, Social, Economic)
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- Geography of India and the world
- Natural resources, climate, agriculture, industries
- Indian Polity and Governance
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- Constitution, political system, Panchayati Raj
- Public policy, rights issues, and governance structures
- Economic and Social Development
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- Sustainable development, poverty, inclusion
- Demographics, social sector initiatives
- Environmental Ecology, Biodiversity, and Climate Change (general awareness, no subject specialization required)
- General Science
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- Basic concepts across physics, chemistry, biology
- Everyday science and technological applications
Paper II: CSAT — Civil Services Aptitude Test — 200 Marks
- 80 questions, 2.5 marks each, 2-hour duration
- Qualifying in nature — candidates need only 33% (66 marks) to clear; the score doesn't count toward the merit/cutoff
- Negative marking: 1/3rd mark deducted per wrong answer
Detailed topic-wise syllabus:
- Comprehension (reading passages and inference)
- Interpersonal skills including communication
- Logical reasoning and analytical ability
- Decision-making and problem-solving
- General mental ability
- Basic numeracy (numbers, relationships, orders of magnitude — Class 10 level)
- Data interpretation (charts, graphs, tables, data sufficiency — Class 10 level)
UPSC Mains Syllabus 2026 (Detailed)
The Mains Examination is descriptive and tests conceptual depth, analytical ability, and answer-writing skill. It consists of 9 papers, though only 7 count toward the final merit ranking.
Qualifying Papers (Marks not counted in merit, but must be cleared)
Paper A: Indian Language — 300 Marks
- Tests comprehension, précis writing, usage/vocabulary, short essays, and translation (English to the Indian language and vice versa)
- Candidates from certain North-Eastern/hill states may be exempted
- Minimum qualifying marks: 25%
Paper B: English — 300 Marks
- Similar structure to Paper A but in English
- Tests comprehension, précis writing, usage, vocabulary, and short essays
- Minimum qualifying marks: 25%
Merit-Ranking Papers (1,750 Marks Total)
Paper I: Essay — 250 Marks
- Candidates must write essays on multiple topics
- Tests the ability to organize ideas coherently and express them precisely
Paper II: General Studies I — 250 Marks
- Indian Heritage and Culture
- History and Geography of the World and Society
- Modern Indian history from the 18th century
- Freedom struggle and its landmark events
- Post-independence consolidation
- World history (18th century onward — industrial revolution, world wars, colonization, decolonization)
- Indian society: diversity, poverty, urbanization, globalization's social effects
- Geography: physical geography, resource distribution, geographical features and their impact
Paper III: General Studies II — 250 Marks
- Governance, Constitution, Polity, Social Justice, and International Relations
- Indian Constitution: historical background, features, amendments, significant provisions
- Functions and responsibilities of the Union and States
- Separation of powers, dispute redressal mechanisms
- Statutory, regulatory, and quasi-judicial bodies
- Government policies and interventions for development
- Welfare schemes for vulnerable sections
- Issues relating to health, education, human resources
- Governance, transparency, accountability, e-governance
- Role of civil services in a democracy
- India and its neighborhood relations
- Bilateral, regional, and global groupings involving India
- Effect of foreign policies on India's interests
Paper IV: General Studies III — 250 Marks
- Technology, Economic Development, Biodiversity, Environment, Security, and Disaster Management
- Indian economy: planning, resource mobilization, growth, development
- Government budgeting
- Agriculture: cropping patterns, irrigation, food processing, subsidies, PDS
- Land reforms, infrastructure (energy, ports, roads, railways)
- Science and technology: developments and applications
- Indigenization of technology, space, IT, robotics, nanotech, biotech
- Environmental conservation, pollution, degradation, environmental impact assessment
- Disaster and disaster management
- Internal security challenges, linkages of organized crime with terrorism
- Role of external state and non-state actors
- Security forces and agencies, border area management
- Cyber security basics
Paper V: General Studies IV — 250 Marks
- Ethics, Integrity, and Aptitude
- Ethics and human interface, essence, determinants of ethics
- Human values, lessons from lives of great leaders/reformers
- Attitude: content, structure, influence on thought/behaviour
- Aptitude and foundational values for civil service
- Emotional intelligence
- Contributions of moral thinkers and philosophers (India and world)
- Public/civil service values, ethics in public administration
- Probity in governance, work culture, quality of service delivery
- Case studies on the above topics
Paper VI: Optional Subject — Paper I — 250 Marks
Paper VII: Optional Subject — Paper II — 250 Marks
Candidates choose one optional subject from a list of around 48 options, including subjects like Public Administration, Sociology, Geography, History, Political Science and International Relations, Anthropology, Economics, Literature of various languages, and engineering/science disciplines (Mathematics, Physics, Chemistry, etc.). Each optional carries two papers of 250 marks each (500 marks total).
UPSC Interview (Personality Test) — 275 Marks
The final stage assesses a candidate's personality, communication skills, judgment, mental alertness, and suitability for a career in public service through a board interview — not a test of memorized knowledge.
Final Merit Calculation
| Component | Marks |
|---|---|
| Mains (7 papers: Essay + GS I–IV + Optional I & II) | 1,750 |
| Interview | 275 |
| Total | 2,025 |
Prelims and the qualifying language papers (A & B) do not add to this final score — they only decide eligibility to proceed further.
Tips to Approach the UPSC CSE Syllabus
- Start with NCERTs to build foundational clarity across History, Geography, Polity, and Economy before moving to advanced sources.
- Integrate current affairs daily — a large share of both Prelims and Mains draws from ongoing events.
- Practice answer writing early for Mains; conceptual knowledge alone doesn't translate into good scores without structured writing practice.
- Choose your optional subject based on genuine interest, scoring trends, and overlap with the GS syllabus, not just popularity.
- Revise the CSAT basics (numeracy, reasoning) periodically even if you're confident, since it's qualifying but still requires consistent practice.
Note: The UPSC CSE syllabus structure has remained largely unchanged in recent years. Always cross-check exam dates, notification details, and any late updates against the official UPSC notification on upsc.gov.in before finalizing your preparation strategy.
