March 27, 20266 min read
UPSC Syllabus 2026 — Complete Prelims & Mains Breakdown
Detailed UPSC CSE 2026 syllabus for Prelims and Mains with topic-wise breakdown, weightage analysis, and preparation priority guide.
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Understanding the UPSC syllabus inside-out is the first step toward a successful civil services journey. This detailed breakdown from ExamHub covers every topic in the Prelims and Mains syllabus so you can plan your preparation strategically.
UPSC Prelims Syllabus 2026
Paper I — General Studies (200 Marks)
| Topic | Approximate Weightage | Priority |
|---|---|---|
| History & Culture | 15-20% | High |
| Geography | 10-15% | High |
| Polity & Governance | 15-20% | Very High |
| Economy | 12-18% | High |
| Environment & Ecology | 10-15% | High |
| Science & Technology | 8-12% | Medium |
| Current Affairs | 20-25% | Very High |
History & Culture
- Ancient India — Indus Valley Civilization, Vedic period, Mauryas, Guptas
- Medieval India — Delhi Sultanate, Mughal Empire, Bhakti & Sufi movements
- Modern India — British rule, freedom struggle, reform movements
- Art & Culture — Architecture, paintings, music, dance forms, festivals
Geography
- Physical Geography — Geomorphology, climatology, oceanography
- Indian Geography — Physiography, rivers, climate, soils, natural vegetation
- World Geography — Continents, important straits, global phenomena
- Human Geography — Population, urbanization, migration
Polity & Governance
- Indian Constitution — Preamble, Fundamental Rights, DPSPs, Amendments
- Parliament & State Legislatures — Composition, powers, procedures
- Judiciary — Supreme Court, High Courts, tribunals
- Local governance — Panchayati Raj, Municipalities
- Statutory & Constitutional bodies
Economy
- Basic concepts — GDP, inflation, fiscal policy, monetary policy
- Indian Economy — Planning, liberalization, sectors
- Banking & Finance — RBI, SEBI, banking reforms
- Government schemes & budgets
Environment & Ecology
- Biodiversity — Hotspots, endangered species, conservation
- Climate change — Paris Agreement, UNFCCC, carbon markets
- Environmental legislation — Wildlife Protection Act, Forest Rights Act
- Pollution — Air, water, soil pollution and mitigation
Paper II — CSAT (200 Marks, Qualifying)
| Topic | Questions (Approx.) |
|---|---|
| Comprehension | 25-30 |
| Logical Reasoning | 15-20 |
| Analytical Ability | 10-15 |
| Decision Making | 5-8 |
| Basic Numeracy | 10-15 |
| Data Interpretation | 5-10 |
UPSC Mains Syllabus 2026
Paper Structure
| Paper | Subject | Marks | Type |
|---|---|---|---|
| A | Indian Language (Qualifying) | 300 | Qualifying |
| B | English (Qualifying) | 300 | Qualifying |
| I | Essay | 250 | Merit |
| II | GS-I (History, Geography, Society) | 250 | Merit |
| III | GS-II (Polity, Governance, IR) | 250 | Merit |
| IV | GS-III (Economy, Environment, S&T, Security) | 250 | Merit |
| V | GS-IV (Ethics) | 250 | Merit |
| VI | Optional Paper I | 250 | Merit |
| VII | Optional Paper II | 250 | Merit |
| Total | 1750 |
GS-I: History, Geography & Society
- Indian heritage and culture
- Modern Indian history from the mid-18th century
- World history — events from the 18th century onward
- Indian society — diversity, role of women, urbanization
- World physical geography — important geophysical phenomena
- Distribution of key natural resources
GS-II: Polity, Governance & International Relations
- Indian Constitution — features, amendments, significant provisions
- Functions and responsibilities of the Union and States
- Separation of powers, dispute redressal mechanisms
- Government policies and interventions in various sectors
- Welfare schemes for vulnerable sections
- Issues relating to development and management of social sectors
- International relations — India and its neighbors, bilateral agreements
GS-III: Economy, Environment, Security
- Indian Economy — growth, development, employment
- Government budgeting, fiscal policy
- Agriculture — issues, food processing, land reforms
- Infrastructure — energy, ports, roads
- Science and Technology — developments, achievements
- Environment — conservation, biodiversity, climate change
- Internal security — challenges, role of media, cybersecurity
GS-IV: Ethics, Integrity & Aptitude
- Ethics and human interface — essence, determinants, consequences
- Attitude — content, structure, function
- Aptitude and foundational values for civil services
- Emotional intelligence and its utility
- Public/civil service values and ethics in public administration
- Probity in governance — philosophical basis, information sharing
- Case studies on the above issues
How to Use This Syllabus for Preparation
- Print the syllabus and keep it on your desk — refer to it daily
- Tick off topics as you complete them to track progress
- Map current affairs to syllabus topics — every news item connects to a syllabus topic
- Focus on high-weightage areas first — Polity, Economy, and Current Affairs together make up 50%+ of Prelims
- Use CalcHub calculators to estimate your scores and track improvement
Frequently Asked Questions
How often does UPSC change its syllabus?
UPSC rarely changes the core syllabus. The last major change was in 2013 when CSAT was introduced. However, the nature of questions evolves — expect more application-based and current affairs-linked questions each year.
Which subject has the highest weightage in UPSC Prelims?
Current affairs combined with Polity consistently carry the highest weightage, together accounting for 35-45% of questions. Building strong current affairs is non-negotiable.
Should I study everything in the syllabus?
Yes, you should have at least a basic understanding of every topic. However, prioritize high-weightage topics and areas where you can score well. Strategic preparation beats exhaustive preparation.
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