Everything about the UPSC Civil Services Main Examination — the scheme of all nine papers, the qualifying language papers, the Essay, the complete syllabus of General Studies I to IV, all 48 optional subjects, cut-offs, exam-day rules and preparation.
- 9 papers — 7 for merit
- 1,750 marks — Written merit
- 3 hours — Each paper
- 48 optionals — Choose one
- 20 Aug 2027 — Next Mains
Disclaimer: The syllabus is summarised from the UPSC Civil Services notice; cut-offs and dates change every year. Always verify on upsc.gov.in and in the current notice — the notice contains the full, authoritative syllabus of every optional subject. Page compiled October 2026.
Introduction & overview
The Civil Services (Main) Examination is the second stage of the UPSC Civil Services Examination. It is a written, descriptive examination of nine papers that tests depth of understanding and answer-writing ability. Marks of seven papers (1,750) are added to the Personality Test (275) to decide the final rank.
| Conducted by | Union Public Service Commission (UPSC) — upsc.gov.in |
|---|---|
| Who can appear | Candidates declared qualified in the Civil Services (Preliminary) Examination of the same year |
| Papers | 9 papers: 2 qualifying language papers + Essay + 4 General Studies papers + 2 Optional papers |
| Duration | 3 hours for each paper, over five days |
| Merit marks | 1,750 (Papers I – VII) |
| CSE Mains 2026 | Began on 21 August 2026 (five days); result expected around November 2026 |
| CSE Mains 2027 | From 20 August 2027 (UPSC calendar) |
Scheme of papers
| Paper | Subject | Marks | Nature |
|---|---|---|---|
| Paper A | One Indian language (from the Eighth Schedule) chosen by the candidate | 300 | Qualifying |
| Paper B | English | 300 | Qualifying |
| Paper I | Essay | 250 | Merit |
| Paper II | General Studies I — Indian heritage & culture, history and geography of the world and society | 250 | Merit |
| Paper III | General Studies II — governance, constitution, polity, social justice and international relations | 250 | Merit |
| Paper IV | General Studies III — technology, economic development, biodiversity, environment, security and disaster management | 250 | Merit |
| Paper V | General Studies IV — ethics, integrity and aptitude | 250 | Merit |
| Paper VI | Optional subject — Paper 1 | 250 | Merit |
| Paper VII | Optional subject — Paper 2 | 250 | Merit |
| Merit total | Papers I – VII | 1,750 | — |
How the qualifying papers work
A candidate must score at least 25% in each of Papers A and B; marks in Papers I – VII are counted only if this standard is met. The marks of Papers A and B are not added to the merit.
Paper A is not compulsory for candidates from Arunachal Pradesh, Manipur, Meghalaya, Mizoram, Nagaland and Sikkim, and for certain PwBD candidates, as stated in the notice.
↑ Back to topQualifying papers (A & B)
| Question type | Paper A marks | Paper B marks |
|---|---|---|
| Essay | 100 | 100 |
| Reading comprehension | 60 | 60 |
| Précis writing | 60 | 60 |
| Translation — English to the Indian language | 20 | — |
| Translation — Indian language to English | 20 | — |
| Grammar and basic language usage | 40 | 80 |
| Total | 300 | 300 |
Both papers are of Class 10 standard. The language for Paper A is chosen in the application and must be written in the script given in the notice.
↑ Back to topEssay (Paper I)
| Item | Details |
|---|---|
| Marks | 250 |
| Structure | Two sections; each has four topics, and the candidate writes one essay from each section |
| Marks per essay | 125 |
| Suggested length | About 1,000 – 1,200 words per essay |
| Time | 3 hours |
Candidates are expected to keep close to the topic, arrange their ideas in an orderly way and write concisely. Credit is given for effective and exact expression. Topics range from philosophical and abstract themes to social, economic, political and technological issues.
↑ Back to topGeneral Studies I (Paper II)
Indian heritage and culture, history and geography of the world and society — 250 marks.
- Indian culture — salient aspects of art forms, literature and architecture from ancient to modern times
- Modern Indian history from about the middle of the 18th century to the present — significant events, personalities and issues
- The freedom struggle — its stages and important contributors from different parts of the country
- Post-independence consolidation and reorganisation within the country
- History of the world — events from the 18th century: industrial revolution, world wars, redrawing of national boundaries, colonisation, decolonisation, and political philosophies such as communism, capitalism and socialism, and their effects on society
- Salient features of Indian society and the diversity of India
- Role of women and women’s organisations; population and associated issues; poverty and developmental issues; urbanisation, its problems and remedies
- Effects of globalisation on Indian society
- Social empowerment, communalism, regionalism and secularism
- Salient features of the world’s physical geography
- Distribution of key natural resources across the world, including South Asia and the Indian sub-continent; factors behind the location of primary, secondary and tertiary industries in various parts of the world, including India
- Important geophysical phenomena such as earthquakes, tsunamis, volcanic activity and cyclones; geographical features and their location; changes in critical geographical features (including water bodies and ice-caps) and in flora and fauna, and the effects of such changes
General Studies II (Paper III)
Governance, constitution, polity, social justice and international relations — 250 marks.
- Indian Constitution — historical underpinnings, evolution, features, amendments, significant provisions and basic structure
- Functions and responsibilities of the Union and the States; issues and challenges of the federal structure; devolution of powers and finances to local levels
- Separation of powers between organs; dispute-redressal mechanisms and institutions
- Comparison of the Indian constitutional scheme with that of other countries
- Parliament and State legislatures — structure, functioning, conduct of business, powers and privileges
- Structure, organisation and functioning of the Executive and the Judiciary; ministries and departments; pressure groups and formal / informal associations
- Salient features of the Representation of People’s Act
- Appointment to various constitutional posts; powers, functions and responsibilities of constitutional bodies
- Statutory, regulatory and various quasi-judicial bodies
- Government policies and interventions for development in various sectors, and issues arising from their design and implementation
- Development processes and the development industry — the role of NGOs, SHGs, donors, charities and other stakeholders
- Welfare schemes for vulnerable sections; mechanisms, laws, institutions and bodies for their protection
- Issues relating to the development and management of the social sector and services relating to health, education and human resources
- Issues relating to poverty and hunger
- Governance, transparency and accountability; e-governance; citizens’ charters; the role of civil services in a democracy
- India and its neighbourhood — relations
- Bilateral, regional and global groupings and agreements involving India and/or affecting India’s interests
- Effect of policies and politics of developed and developing countries on India’s interests; the Indian diaspora
- Important international institutions, agencies and fora — their structure and mandate
General Studies III (Paper IV)
Technology, economic development, biodiversity, environment, security and disaster management — 250 marks.
- Indian economy — planning, mobilisation of resources, growth, development and employment
- Inclusive growth and issues arising from it
- Government budgeting
- Major crops and cropping patterns; irrigation systems; storage, transport and marketing of agricultural produce; e-technology in aid of farmers
- Direct and indirect farm subsidies and minimum support prices; public distribution system; buffer stocks and food security; technology missions; economics of animal rearing
- Food processing and related industries — scope, location, upstream and downstream requirements, supply-chain management
- Land reforms in India
- Effects of liberalisation on the economy; changes in industrial policy and their effects on industrial growth
- Infrastructure — energy, ports, roads, airports, railways etc.
- Investment models
- Science and technology — developments and applications in everyday life; achievements of Indians in science and technology; indigenisation of technology
- Awareness in IT, space, computers, robotics, nano-technology, bio-technology and intellectual property rights
- Conservation, environmental pollution and degradation; environmental impact assessment
- Disaster and disaster management
- Linkages between development and the spread of extremism
- Role of external state and non-state actors in creating challenges to internal security
- Challenges to internal security through communication networks; role of media and social networking; basics of cyber security; money laundering and its prevention
- Security challenges and their management in border areas; linkages of organised crime with terrorism
- Various security forces and agencies and their mandate
General Studies IV (Paper V)
Ethics, integrity and aptitude — 250 marks. The paper tests attitude and approach to questions of integrity and probity in public life, and includes case studies.
- Ethics and human interface — essence, determinants and consequences of ethics in human actions; dimensions of ethics; ethics in private and public relationships; human values — lessons from the lives of great leaders, reformers and administrators; role of family, society and educational institutions in inculcating values
- Attitude — content, structure and function; its influence on thought and behaviour; moral and political attitudes; social influence and persuasion
- Aptitude and foundational values for civil service — integrity, impartiality and non-partisanship, objectivity, dedication to public service, empathy, tolerance and compassion towards weaker sections
- Emotional intelligence — concepts, and its utility and application in administration and governance
- Contributions of moral thinkers and philosophers from India and the world
- Public / civil service values and ethics in public administration — status and problems; ethical concerns and dilemmas in government and private institutions; laws, rules, regulations and conscience as sources of ethical guidance; accountability and ethical governance; strengthening of ethical and moral values in governance; ethical issues in international relations and funding; corporate governance
- Probity in governance — concept of public service; philosophical basis of governance and probity; information sharing and transparency; Right to Information; codes of ethics and conduct; citizens’ charters; work culture; quality of service delivery; utilisation of public funds; challenges of corruption
- Case studies on the above issues
Optional subjects (Papers VI & VII)
Candidates choose one optional subject from a list of 48: 25 subjects and the literature of 23 languages. Each optional has two papers of 250 marks.
| Subject | Paper 1 | Paper 2 |
|---|---|---|
| Agriculture | Ecology and cropping systems, soil science, water management, farm management, agricultural extension | Cell biology, genetics and plant breeding, seed technology, plant physiology, horticulture, plant protection, food security |
| Animal Husbandry & Veterinary Science | Animal nutrition, physiology, genetics and breeding, livestock production, extension | Animal health and hygiene, diseases, veterinary public health, milk and meat technology, poultry products |
| Anthropology | Foundations of anthropology, human evolution, culture and society, social organisation, research methods, human genetics | Evolution of Indian culture and civilisation, demographic and ethnic profile, tribal India, caste system, tribal problems and development |
| Botany | Microbiology and plant pathology, cryptogams, phanerogams, plant resource development, morphogenesis | Cell biology, genetics, evolution, biostatistics, plant physiology and biochemistry, ecology and plant geography |
| Chemistry | Atomic structure, bonding, solid state, gaseous and liquid state, thermodynamics, phase equilibria, electrochemistry, kinetics, photochemistry, coordination and bio-inorganic chemistry | Organic reaction mechanisms, pericyclic reactions, polymers, synthetic uses of reagents, photochemistry, spectroscopy |
| Civil Engineering | Engineering mechanics, strength of materials, structural analysis, design of steel and concrete structures, fluid mechanics, geotechnical engineering | Construction technology and management, surveying, transportation engineering, hydrology and water resources, environmental engineering |
| Commerce & Accountancy | Financial accounting, cost accounting, taxation, auditing, financial management, financial institutions and markets | Organisation theory and behaviour, human resource management, industrial relations |
| Economics | Advanced micro- and macro-economics, money, banking and finance, international economics, growth and development | Indian economy before and after independence, planning, liberalisation and reforms |
| Electrical Engineering | Circuit theory, signals and systems, electromagnetic theory, analog and digital electronics, energy conversion, power electronics and drives, analog communication | Control systems, microprocessors, measurement and instrumentation, power systems, digital communication |
| Geography | Physical geography (geomorphology, climatology, oceanography, biogeography, environmental geography) and human geography (economic, population, settlement, regional planning, models and theories) | Geography of India — physical setting, resources, agriculture, industry, transport, population, settlement, regional development, contemporary issues |
| Geology | General geology, geomorphology and remote sensing, structural geology, palaeontology, Indian stratigraphy, hydrogeology and engineering geology | Mineralogy, igneous and metamorphic petrology, sedimentology, economic geology, Indian mineral deposits, mining, geochemistry, environmental geology |
| History | Ancient and medieval India — from sources and prehistory to the 18th century | Modern India from the mid-18th century, the national movement, post-independence India, and world history from the 18th century |
| Law | Constitutional and administrative law, international law | Law of crimes, law of torts, law of contracts and mercantile law, contemporary legal developments |
| Management | Managerial functions, organisational behaviour, human resource management, accounting for managers, financial management, marketing | Quantitative techniques, production and operations management, management information systems, government–business interface, strategic management, international business |
| Mathematics | Linear algebra, calculus, analytic geometry, ordinary differential equations, dynamics and statics, vector analysis | Algebra, real analysis, complex analysis, linear programming, partial differential equations, numerical analysis and computer programming, mechanics and fluid dynamics |
| Mechanical Engineering | Mechanics, engineering materials, mechanisms and machines, design of machine elements, manufacturing science, manufacturing management | Thermodynamics, heat transfer, IC engines, steam engineering, refrigeration and air-conditioning, turbo-machinery |
| Medical Science | Anatomy, physiology, biochemistry, pathology, microbiology, pharmacology, forensic medicine and toxicology | General medicine, paediatrics, dermatology, general surgery, obstetrics and gynaecology including family planning, preventive and social medicine |
| Philosophy | History and problems of philosophy — Western and Indian | Socio-political philosophy and philosophy of religion |
| Physics | Mechanics, waves and optics, electricity and magnetism, thermal and statistical physics | Quantum mechanics, atomic and molecular physics, nuclear and particle physics, solid-state physics and electronics |
| Political Science & International Relations | Political theory and Indian politics — thinkers, ideologies, national movement, constitution, federalism, parties and social movements | Comparative politics and international relations; India and the world |
| Psychology | Foundations of psychology — methods, development, attention and perception, learning, memory, intelligence, personality, motivation and emotion | Issues and applications — measurement, well-being and mental disorders, work, education, disadvantaged groups, social integration, IT and mass media, military and gender issues |
| Public Administration | Administrative theory | Indian administration |
| Sociology | Fundamentals of sociology — thinkers, research methods, stratification, institutions, social change | Indian society — structure and change |
| Statistics | Probability, statistical inference, linear inference and multivariate analysis, sampling techniques, design and analysis of experiments | Industrial statistics, optimisation techniques, quantitative economics and official statistics, demography and psychometry |
| Zoology | Non-chordata and chordata, ecology, ethology, economic zoology, biostatistics, instrumentation methods | Cell biology, genetics, evolution, systematics, biochemistry, physiology, developmental biology |
Literature of languages
| Paper | Content |
|---|---|
| Paper 1 | History of the language and its literature, literary forms and critical concepts |
| Paper 2 | Textual study of the prescribed works — answers require first-hand reading of the texts |
Languages available: Assamese, Bengali, Bodo, Dogri, Gujarati, Hindi, Kannada, Kashmiri, Konkani, Maithili, Malayalam, Manipuri, Marathi, Nepali, Odia, Punjabi, Sanskrit, Santhali, Sindhi, Tamil, Telugu, Urdu, English.
Choosing an optional
Any optional subject can be chosen, whatever your graduation subject. The optional is chosen in the application and can be changed only if the notice allows it. The full syllabus of every optional is given in the CSE notice.
Mains cutoffs
| Category | Mains written (of 1,750) | Final (of 2,025) |
|---|---|---|
| General | 739 | 963 |
| EWS | 706 | 926 |
| OBC | 717 | 931 |
| SC | 700 | 905 |
| ST | 694 | 902 |
| PwBD-1 | 703 | 917 |
| PwBD-2 | 708 | 944 |
| PwBD-3 | 536 | 804 |
| PwBD-5 | 451 | 631 |
Released by UPSC after the CSE 2025 final result (6 March 2026). The difference between the two columns shows how many marks the last selected candidates scored in the Personality Test (out of 275), on average.
Qualifying for the interview
About two to three times the number of vacancies are called for the Personality Test on the basis of Mains marks.
Important dates
| Event | CSE 2026 | CSE 2027 |
|---|---|---|
| Prelims result / DAF-I | 15 June 2026 / June – July 2026 | June 2027 (expected) |
| Mains | From 21 August 2026 (five days) | From 20 August 2027 (five days) |
| Mains result | About November 2026 (expected) | — |
| Personality Test | Early 2027 (expected) | — |
| Final result | About April 2027 (expected) | — |
Paper-wise timetable is published by UPSC about a month before the Mains; follow upsc.gov.in.
↑ Back to topExam day guidelines — what to carry & what not to bring
The Mains is a written examination in Question-cum-Answer Booklets (QCAB). Read the instructions on your e-admit card and on the booklet cover.
✅ Allowed items — carry these
- e-Admit card printed, and the original photo ID whose number is on it.
- Pens with black ink, as instructed — write only in the space given for each question.
- Scientific (non-programmable) calculator for the conventional papers, where permitted in the notice.
- Two passport-size photographs, same as uploaded, if the photo on the admit card is unclear.
- PwBD certificate and scribe documents, if applicable.
ℹ️ Note
There is no arrangement for safekeeping of barred items at the venue. Answers written in a medium other than the one chosen in DAF-I may not be evaluated.
Books & preparation
| Paper | Book | Author / publisher |
|---|---|---|
| Essay | Essays on topical issues; previous UPSC essay papers | — |
| GS I — Art & culture | Indian Art and Culture | Nitin Singhania |
| GS I — Modern history | A Brief History of Modern India (Spectrum) | Rajiv Ahir |
| GS I — World history | Mastering Modern World History | Norman Lowe |
| GS I — Society | Social Problems in India | Ram Ahuja |
| GS I — Geography | Certificate Physical and Human Geography | G.C. Leong |
| GS II — Polity | Indian Polity | M. Laxmikanth |
| GS II — Governance | Governance in India | M. Laxmikanth |
| GS II — International relations | Pax Indica | Shashi Tharoor |
| GS III — Economy | Indian Economy | Ramesh Singh |
| GS III — Environment | Environment | Shankar IAS Academy |
| GS III — Internal security | Challenges to Internal Security of India | Ashok Kumar & Vipul |
| GS IV — Ethics | Lexicon for Ethics, Integrity & Aptitude | Chronicle |
| All GS papers | NCERT textbooks (Class 6 – 12); Economic Survey; India Year Book | NCERT; Ministry of Finance; Publications Division |
Preparation tips
- Answer writing: practise 150- and 250-word answers daily; introduction, body with sub-headings, and a balanced conclusion.
- Previous papers: UPSC publishes all Mains papers on upsc.gov.in — map each question to the syllabus.
- Current affairs: link news to syllabus topics; GS II and GS III are largely current-issue based.
- Optional: finish the optional syllabus before Prelims; it carries 500 marks.
- Ethics case studies: practise structured answers with stakeholders, options and a justified course of action.
FAQs & helpline
How many papers are there in the Mains?
Nine: two qualifying language papers and seven merit papers (Essay, four GS papers and two optional papers).
Are Papers A and B counted in the merit?
No. They are qualifying (25% each); the merit papers are evaluated only if you meet that standard.
How many optional subjects are there?
48 in all — 25 subjects and the literature of 23 languages (22 Indian languages and English).
Can I write the Mains in Hindi or a regional language?
Yes, in English or any language of the Eighth Schedule, as chosen in the application; Papers A and B have their own rules.
Is a calculator allowed?
A scientific (non-programmable) calculator is permitted for conventional papers where the notice allows it; programmable calculators are barred.
How many candidates are called for the interview?
About two to three times the number of vacancies, on the basis of Mains marks.
When is CSE Mains 2027?
From 20 August 2027, as per the UPSC calendar.
What was the CSE 2025 Mains cut-off for General?
739 out of 1,750.
Official helpline & links
- UPSC facilitation counter
- 011-23385271 / 011-23381125 / 011-23098543 (10:00 AM – 5:00 PM on working days)
- UPSC website
- upsc.gov.in — notice, full optional syllabi and previous papers
