UPSC Mains — Overview
What is UPSC Mains?
UPSC Civil Services Mains is the second stage of India's most prestigious exam — the Civil Services Examination (CSE). It qualifies candidates for IAS (Indian Administrative Service), IPS (Indian Police Service), IFS (Indian Foreign Service), and other Group A/B central services.
Mains Exam Structure
| Paper | Subject | Marks | Nature |
|---|
|---|---|---|---|
| A | Indian Language (qualifying) | 300 | Qualifying |
|---|---|---|---|
| B | English (qualifying) | 300 | Qualifying |
| I | Essay | 250 | Merit |
| II | GS1: History, Society, Geography | 250 | Merit |
| III | GS2: Governance, Polity, IR | 250 | Merit |
| IV | GS3: Economy, Agriculture, Science | 250 | Merit |
| V | GS4: Ethics, Integrity, Aptitude | 250 | Merit |
| VI | Optional Paper 1 | 250 | Merit |
| VII | Optional Paper 2 | 250 | Merit |
| Total | 1750 |
Plus interview (Personality Test): 275 marks
Grand Total: 2025 marks
GS1 — 250 marks
Modern history, world history, Indian society, geography
GS2 — 250 marks
Constitution, governance, social justice, international relations
GS3 — 250 marks
Economy, agriculture, infrastructure, environment, security
GS4 — 250 marks
Ethics, integrity, aptitude, case studies
GS Paper Topics in Detail
GS1 (250 marks):
•Modern Indian History (1857 to Independence)
•Post-Independence consolidation and reorganization
•World History (18th-20th century)
•Indian Society: diversity, women, poverty, urbanization
•Geography: physical, Indian, world economic geography
GS2 (250 marks):
•Indian Constitution: features, amendments, schedules
•Parliament, state legislatures, executive, judiciary
•Governance: transparency, RTI, e-governance
•Social justice: welfare schemes, vulnerable sections
•International Relations: India and its neighbors, global bodies (UN, WTO, WHO)
GS3 (250 marks):
•Indian Economy: planning, growth, development
•Agriculture: land reforms, food security, crop patterns
•Infrastructure: energy, roads, ports, airports
•Environment & Ecology: biodiversity, climate change
•Science & Technology: space, defence, biotechnology
•Internal security: extremism, cyber security
GS4 (250 marks):
•Ethics and Human Interface
•Attitude, Aptitude, Foundational Values
•Emotional Intelligence
•Case Studies (very important — 2-3 case studies, 25 marks each)
•Public administration values, integrity, accountability
Answer Writing Strategy
Unlike Prelims, Mains tests your ability to articulate — both knowledge AND expression matter.
Introduction
1 paragraph
Body
3-5 paragraphs -- headings, data, examples, diagrams
Conclusion
Ties the answer together
Key rules:
1.Structure — Introduction (1 para) → Body (3-5 paras) → Conclusion
2.Headings and subheadings — examiners appreciate organized answers
3.Data and examples — schemes, committees, constitutional provisions, international comparisons
4.Diagrams — flowcharts and maps where relevant
5.Word limit — 10-mark questions: 150 words; 15-mark: 200 words; 20-mark: 250 words
Resources
•NCERT books (6-12th) — foundation for all GS papers
•The Hindu newspaper — daily reading essential
•Vision IAS / Insights on India — monthly current affairs compilation
•Vajiram & Ravi — standard notes widely used
•Previous year questions (PYQs) — most important, understand what's being asked