UPSC Mains 2027 Syllabus: Paper-Wise & Subject-Wise Breakdown for IAS Aspirants
UPSC Mains exam has 9 papers, but only 7 count for merit. These 7 papers carry 1750 marks, and the Personality Test (Interview) adds another 275 marks, taking the total to 2025 marks. Two papers - Indian Language and English - are only qualifying and do not add to your rank. This guide breaks down every paper so you know exactly what to study and how much it's worth.
UPSC Mains 2027 Exam Pattern at a Glance
The Mains exam is a descriptive, pen-and-paper test spread across several days. Unlike Prelims, there is no negative marking here, so attempting every question matters more than guessing carefully.
Paper | Subject | Marks | Duration | Nature |
Paper A | Indian Language | 300 | 3 hours | Qualifying |
Paper B | English | 300 | 3 hours | Qualifying |
Paper I | Essay | 250 | 3 hours | Merit |
Paper II | General Studies I | 250 | 3 hours | Merit |
Paper III | General Studies II | 250 | 3 hours | Merit |
Paper IV | General Studies III | 250 | 3 hours | Merit |
Paper V | General Studies IV | 250 | 3 hours | Merit |
Paper VI | Optional Subject Paper I | 250 | 3 hours | Merit |
Paper VII | Optional Subject Paper II | 250 | 3 hours | Merit |
You must score at least 25% in Paper A and Paper B to qualify. If you miss this cutoff, the Commission does not evaluate your other papers, no matter how well you score in them.
UPSC Mains Qualifying Papers Syllabus
These two papers test basic language skills, not subject knowledge. You need to clear the minimum mark, but scoring higher does not help your rank.
Compulsory Indian Language Paper Syllabus
You choose one language listed in the Eighth Schedule of the Constitution - Hindi, Bengali, Tamil, Telugu, Marathi, and 18 others are included. The paper tests:
Comprehension of unseen passages
Précis writing (shortening a passage without losing meaning)
Usage and vocabulary
Short essay writing
Translation from English to the chosen language and back
If your matriculation or an equivalent exam was in that language, you may claim exemption. Check the official notification each year, as exemption rules may change.
English Paper Syllabus for UPSC Mains
The English paper follows the same pattern as the Indian Language paper. It checks whether you can read, write, and think clearly in English. Expect:
Comprehension passages
Précis writing
Essay on a general topic
Usage, grammar, and vocabulary questions
Translation from an Indian language to English
Candidates from Arunachal Pradesh, Manipur, Meghalaya, Mizoram, Nagaland, and Sikkim can skip the Indian Language paper, but English remains compulsory for everyone.
UPSC Mains Essay Paper Syllabus 2027
Paper I asks you to write two essays, one from Section A and one from Section B, each worth 125 marks. The word limit is around 1000–1200 words per essay, and you get three hours total for both.
Topics are not tied to a fixed syllabus. They cover philosophy, current affairs, social issues, and abstract ideas - often phrased as quotes or two-sided statements. For example, a topic might read: "A good leader follows the followers." You need to build a clear argument, add examples, and show balanced thinking rather than just one viewpoint.
To prepare well:
Practice writing one full essay every week under time pressure
Read editorials to pick up diverse examples and vocabulary
Structure each essay with an introduction, body paragraphs, and a conclusion
Avoid one-sided arguments - examiners reward candidates who explore multiple angles
GS Paper 1 Syllabus: History, Geography, Society
GS Paper I covers Indian heritage, culture, history, and geography of India and the world. This paper draws heavily from static knowledge, so a strong foundation from standard textbooks helps more than current affairs here.
Main topics include:
Indian culture - art forms, literature, and architecture from ancient to modern times
Modern Indian history from the mid-eighteenth century, including significant events, personalities, and issues
The freedom struggle - its stages and contributions from different parts of the country
Post-independence consolidation and reorganisation within the country
History of the world covering events like the Industrial Revolution, world wars, colonisation, and decolonisation
Indian society - diversity, poverty, urbanisation, and issues related to women, population, and social empowerment
Geography of the world and India - physical geography, resource distribution, and factors behind the location of industries
Important geophysical phenomena like earthquakes, tsunamis, and cyclones
A simple checklist to track your GS1 preparation:
[ ] Ancient and medieval Indian art and culture
[ ] Modern Indian history (1757 onward)
[ ] Freedom struggle
[ ] Post-independence India
[ ] World history
[ ] Indian society issues
[ ] World geography
[ ] Natural disasters and geophysical events
GS Paper 2 Syllabus: Polity, Governance, IR
GS Paper II tests your understanding of the Constitution, governance structures, and India's relationship with the world. This paper needs both static knowledge of laws and current updates on policies and international events.
Key areas include:
Indian Constitution — its historical background, features, amendments, and important provisions
Functions and responsibilities of the Union and States, including issues around federalism
Separation of powers between different organs, and dispute resolution mechanisms
Parliament and State legislatures — structure, functioning, and powers
Structure and functioning of the Executive and Judiciary
Government policies and interventions for development in various sectors
Welfare schemes for vulnerable sections of the population
Issues relating to health, education, and human resources
Role of civil services in a democracy
India's bilateral, regional, and global relationships
Role of international institutions like the UN, WTO, and IMF
Since this paper mixes theory with current events, connect every constitutional topic with a recent news example - this makes your answers more relevant to examiners.
GS Paper 3 Syllabus: Economy, Environment, S&T, Security
GS Paper III is the widest paper in terms of subject range. It covers economy, agriculture, technology, environment, and internal security - subjects that change quickly, so recent developments matter as much as basic concepts.
Main topics include:
Indian economy - planning, resource mobilisation, growth, development, and employment
Government budgeting
Major crops, irrigation systems, and agricultural marketing
Issues related to food processing and the food processing industry
Land reforms in India
Effects of liberalisation on the economy
Infrastructure - energy, ports, roads, airports, and railways
Investment models
Science and technology developments and their applications in daily life
Achievements of Indians in science and technology
Awareness in fields like IT, space, computers, robotics, nanotechnology, and biotechnology
Environmental conservation and impact assessment
Disaster management
Linkages between organised crime and terrorism
Role of external state and non-state actors in internal security
Security challenges from communication networks and money laundering
Basics of cyber security
Border area security challenges
Given the range, focus on building short, updated notes rather than reading everything from scratch every year.
GS Paper 4 Syllabus: Ethics, Integrity, Aptitude
GS Paper IV is different from the other GS papers because it tests your values and decision-making rather than factual knowledge. A large part of this paper involves case studies where you apply ethical reasoning to real-life situations.
The syllabus includes:
Ethics and human interface - essence, determinants, and consequences of ethics in human actions
Attitude - its structure, function, and influence on thought and behaviour
Aptitude and foundational values for civil service, including impartiality, non-partisanship, objectivity, and dedication to public service
Emotional intelligence - its concepts and how it applies to governance and administration
Contributions of moral thinkers and philosophers from India and the world
Public and private relationships - human values in administration
Probity in governance - concept of public service, codes of ethics, and citizen charters
Case studies on the above issues
For case studies, structure your answer around identifying the ethical issue, listing the stakeholders, weighing options, and choosing a decision with clear justification.
UPSC Optional Subject Syllabus List 2027
Every candidate picks one optional subject, which is examined through two papers of 250 marks each. Choosing the right optional matters because it forms 500 out of the 1750 merit marks.
Available optional subjects include:
Agriculture
Animal Husbandry and Veterinary Science
Anthropology
Botany
Chemistry
Civil Engineering
Commerce and Accountancy
Economics
Electrical Engineering
Geography
Geology
History
Law
Management
Mathematics
Mechanical Engineering
Medical Science
Philosophy
Physics
Political Science and International Relations
Psychology
Public Administration
Sociology
Statistics
Zoology
Literature of a language (from a listed set including Hindi, English, Urdu, Tamil, Telugu, Bengali, and others)
When picking an optional, consider three things:
Your academic background: A subject you studied in graduation usually needs less time to build from scratch.
Overlap with GS papers: Subjects like Geography, Public Administration, and Political Science share content with GS papers, saving preparation time.
Availability of study material and guidance: Some optionals have more coaching support and past-year data than others
UPSC Mains 2027 Syllabus PDF Download
Keep a printed or saved copy of the official UPSC Mains 2027 Syllabus so you can cross-check topics while making notes. The Union Public Service Commission releases the syllabus as part of its official notification on upsc.gov.in, and this stays the authoritative source for exact wording of topics. Download it directly from the official website, and avoid relying only on third-party summaries for the final revision phase.
UPSC Mains 2027 vs 2026 Syllabus - What Changed
The UPSC Mains syllabus has remained largely stable over the past several years, with the core structure of 9 papers and 1750 merit marks unchanged. Aspirants should always verify the latest notification when it is released, since the Commission can update paper patterns, add new topics, or revise marking without a public announcement in advance. Until the official 2027 notification is out, prepare based on the current syllabus structure, and update your notes the moment the new notification is published.
FAQs on UPSC Mains 2027 Syllabus
Is the Essay paper compulsory in UPSC Mains?
Yes. Every candidate must attempt the Essay paper, writing two essays worth 125 marks each for a total of 250 marks.
How many papers are there in UPSC Mains?
There are 9 papers in total: 2 qualifying papers (Indian Language and English) and 7 merit papers (Essay, GS I to IV, and two Optional papers).
Is there negative marking in UPSC Mains?
No. UPSC Mains has no negative marking, unlike the Prelims exam.
What is the minimum qualifying mark for the Language and English papers?
You need at least 25% marks in each paper to qualify. Scoring below this means your other Mains papers are not evaluated.
How many marks does the Personality Test carry?
The Interview carries 275 marks, added to your Mains merit score of 1750 marks for a total of 2025 marks.
Can I skip the Indian Language paper?
Only candidates from Arunachal Pradesh, Manipur, Meghalaya, Mizoram, Nagaland, and Sikkim can skip this paper. Everyone else must attempt it.
How many optional subjects can I choose?
You can choose only one optional subject, examined through two papers of 250 marks each.
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