UPSC Syllabus & Pattern

Why the UPSC Syllabus Is Your Most Important Document

Every decision in civil services preparation, from the books you buy to the optional subject you choose, should flow from two things: the syllabus and the exam pattern. Aspirants who skip this step usually end up reading too much of what UPSC never asks and too little of what it always does.

This guide explains the full structure of the UPSC Civil Services Examination (CSE) 2027: the three stages, marks, the Prelims and Mains syllabus paper by paper, the optional subject list and the interview. It follows the scheme in the CSE 2026 notification, which is the latest published scheme. The CSE 2027 notification is due on 13 January 2027, and it will confirm any change. For the exam dates, see our guide to the UPSC Exam Calendar 2027, and for eligibility and strategy see UPSC CSE 2027.

UPSC Exam Pattern 2027 at a Glance

A key insight follows from these numbers: the Prelims cut-off only gets you in the door, while the rank is decided entirely by Mains and the Interview.

Stage 1: Preliminary Examination Pattern

Rules every aspirant must know:

• You must appear in both papers. Skipping one paper disqualifies you.

• Appearing in even one paper counts as an attempt. Applying but not appearing does not.

• Only the GS Paper I score is used to rank candidates for the Mains cut-off. CSAT only has to be cleared.

• Prelims marks do not carry into your final rank.

UPSC Prelims Syllabus: General Studies Paper I

The official syllabus lists seven broad areas. The table below breaks each one into what you actually need to study.

UPSC Prelims Syllabus: CSAT (General Studies Paper II)

CSAT tests aptitude and reasoning. Its syllabus covers:

• Comprehension

• Interpersonal skills, including communication skills

• Logical reasoning and analytical ability

• Decision-making and problem-solving

• General mental ability

• Basic numeracy (numbers and their relations, orders of magnitude) at Class X level

• Data interpretation (charts, graphs, tables, data sufficiency) at Class X level

CSAT is qualifying, but it is also the stage that eliminates many strong GS candidates. Practise a little every week instead of leaving it for the last month.

Stage 2: Main Examination Pattern

The Mains consists of nine papers, written over five days. Two are qualifying and seven decide your rank.

Papers A and B are matriculation-level language papers. They carry no merit marks, but you must score the minimum qualifying marks, or your other papers will not be evaluated. Check the exact qualifying percentage in the notification. Odia is among the Eighth Schedule languages available for Paper A.

Where the marks are

This is why GS preparation is the backbone of the exam, and why the optional and the essay together still decide close ranks.

UPSC Mains Syllabus: Paper by Paper

Paper I: Essay (250 marks)

Candidates write essays on given topics, usually choosing from different sections. The paper rewards a clear structure, relevant examples, balanced arguments and concise, exact expression, rather than length or memorised passages. Practise one essay a week, covering themes such as society, technology, economy, ethics, governance and environment.

Paper II: General Studies I (250 marks)

Indian Heritage and Culture, History and Geography of the World and Society

• Indian culture: art forms, literature and architecture from ancient to modern times

• Modern Indian history: from about the mid-eighteenth century to the present, with significant events, personalities and issues

• Freedom struggle: its stages and contributors from different parts of the country

• Post-independence consolidation: reorganisation within the country

• World history: from the 18th century, including the industrial revolution, world wars, redrawal of national boundaries, colonisation, decolonisation and political philosophies such as communism, capitalism and socialism

• Indian society: salient features, diversity, role of women and women's organisations, population, poverty and developmental issues, urbanisation, effects of globalisation, social empowerment, communalism, regionalism and secularism

• Geography: salient features of world physical geography; distribution of key natural resources across the world; factors affecting the location of industries; geophysical phenomena such as earthquakes, tsunamis, volcanic activity and cyclones; changes in geographical features, flora and fauna and their effects

Paper III: General Studies II (250 marks)

Governance, Constitution, Polity, Social Justice and International Relations

• Constitution: historical underpinnings, evolution, features, amendments, significant provisions and basic structure; comparison with other countries

• Federalism: functions and responsibilities of the Union and States, devolution of powers and finances to local levels

• Institutions: separation of powers, dispute redressal mechanisms, Parliament and State Legislatures, the Executive and the Judiciary, constitutional posts and bodies, statutory, regulatory and quasi-judicial bodies, the Representation of the People Act

• Policies and welfare: government policies and interventions, role of NGOs, SHGs and other stakeholders, welfare schemes for vulnerable sections and the bodies set up to protect them

• Social sector: health, education and human resources; poverty and hunger

• Governance: transparency and accountability, e-governance, citizens' charters, role of civil services in a democracy

• International relations: India and its neighbourhood, bilateral, regional and global groupings and agreements, the effect of policies of developed and developing countries on India, the Indian diaspora, important international institutions and forums

Paper IV: General Studies III (250 marks)

Technology, Economic Development, Biodiversity, Environment, Security and Disaster Management

• Economy: planning, resource mobilisation, growth, development and employment; inclusive growth; government budgeting

• Agriculture: cropping patterns, irrigation, storage and marketing, subsidies and MSP, PDS, buffer stocks and food security, technology missions, animal rearing, food processing, land reforms

• Industry and infrastructure: effects of liberalisation, industrial policy, energy, ports, roads, airports and railways, investment models

• Science and technology: developments and applications, IT, space, computers, robotics, nanotechnology, biotechnology, intellectual property rights

• Environment: conservation, pollution and degradation, environmental impact assessment

• Disaster management

• Internal security: linkages between development and extremism, role of external state and non-state actors, cyber security, money laundering, border area challenges, links between organised crime and terrorism, security forces and agencies

Paper V: General Studies IV (250 marks)

Ethics, Integrity and Aptitude

This paper tests attitude and problem-solving approach, and uses case studies. Key areas:

• Ethics and human interface: essence, determinants and consequences of ethics; dimensions of ethics; human values from leaders, reformers and administrators; the role of family, society and educational institutions

• Attitude: content, structure and function; moral and political attitudes; social influence and persuasion

• Aptitude and foundational values: integrity, impartiality, objectivity, dedication to public service, empathy, tolerance and compassion

• Emotional intelligence and its use in administration

• Moral thinkers and philosophers from India and the world

• Public service values and ethics in administration: ethical concerns and dilemmas, laws and conscience as sources of guidance, accountability, ethical governance, ethical issues in international relations and funding, corporate governance

• Probity in governance: concept of public service, transparency, Right to Information, codes of ethics and conduct, citizens' charters, work culture, service delivery, use of public funds, corruption

• Case studies

Papers VI and VII: Optional Subject (250 marks each)

The optional carries two conventional papers of 250 marks each, written over three hours per paper. See the next section for the subject list and how to choose.

UPSC Optional Subjects List

The Mains offers 48 optional choices: 25 subjects and the literature of 23 languages.

Subjects (25): 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 (PSIR), Psychology, Public Administration, Sociology, Statistics, Zoology.

Literature (23 languages): Assamese, Bengali, Bodo, Dogri, Gujarati, Hindi, Kannada, Kashmiri, Konkani, Maithili, Malayalam, Manipuri, Marathi, Nepali, Odia, Punjabi, Sanskrit, Santhali, Sindhi, Tamil, Telugu, Urdu and English.

How to choose your optional

The common mistake is switching optionals midway. Decide in the first month and stay with it.

Stage 3: Personality Test (Interview), 275 Marks

The interview is not a general knowledge test. A board of experienced members assesses your suitability for a career in public service, looking at mental alertness, understanding of issues, clear and logical expression, balance of judgement, breadth and depth of interests, ability for leadership and social cohesion, and intellectual and moral integrity. Your Detailed Application Form (DAF), including your hobbies, background, optional subject, education and work history, is the base for most questions. UPSC announces the interview schedule separately after the Mains result.

How the Prelims and Mains Syllabus Overlap

Studying the overlap is the fastest way to save time.

How to Use the Syllabus: A 5-Step Method

1. Print it and break it into topics. Divide each paper into 60 to 100 small topics and tick them off as you finish.

2. Map one primary source to each topic. If you cannot name the source, you do not yet have a plan for that topic.

3. Overlay previous year questions. Mark which topics UPSC tests, how it frames them, and how its depth varies across Prelims and Mains.

4. Tag the topic for its stage. Mark each as Prelims, Mains or both, and plan to revise in two forms: facts for Prelims and arguments for Mains.

5. Revisit the syllabus every month. Check what you have covered, what you have only skimmed and what remains.

Common Mistakes with the UPSC Syllabus

• Studying from a list of coaching notes without checking the official syllabus

• Treating CSAT as an afterthought

• Ignoring GS IV (ethics) until the last month, then losing marks on case studies

• Choosing the optional on rumours, or changing it midway

• Preparing Prelims and Mains in two separate silos

• Reading too many sources for each topic

How RAYACADEMY IAS Can Help You Master the UPSC Syllabus

RAYACADEMY IAS (Inspiring to Aspire) helps aspirants turn a long syllabus into a clear plan.

1. Syllabus-mapped teaching. Our UPSC GS Foundation Programme follows the syllabus topic by topic, so your preparation stays focused on what UPSC actually tests.

2. PYQ-driven content. Our academic team analyses previous year questions in depth, including General Studies trends and the overlap between UPSC and State PSC papers. For Odisha aspirants, this means one plan that serves both the UPSC and the OPSC syllabus through our OPSC / OAS programme.

3. Optional subject and answer-writing guidance. Choosing the right optional and writing structured answers are skills you build with feedback. Our mentors and community of aspirants help you practise and improve on Telegram.

4. Free counselling. Not sure where to start? Share your background and attempts left, and we will help you decide your optional, your timeline and your first month's plan. Book free counselling

5. Resources anytime. Use our Resources and Knowledge Hub, shop for books at our bookstore or learn on the move with the RAYACADEMY app.

Visit or call us: Odisha Campus, Shreeram Plaza, Khandagiri, Bhubaneswar, Odisha 751030 | New Delhi Office, B-7, Vasant Kunj, New Delhi 110070 | +91 76060 24205 | info@rayacademyias.in

UPSC Syllabus and Exam Pattern: Frequently Asked Questions

How many stages are there in the UPSC CSE? Three: the Preliminary Examination, the Main Examination and the Personality Test (Interview).

What are the papers in UPSC Prelims? General Studies Paper I and CSAT (General Studies Paper II), each of 200 marks and 2 hours.

Is there negative marking in UPSC Prelims? Yes. One-third of the marks for a question are deducted for each wrong answer: about 0.66 in GS Paper I and about 0.83 in CSAT.

What is the qualifying mark in CSAT? You need at least 33% (66 out of 200) in CSAT Paper II. It is qualifying, so it is not counted for the cut-off.

How many papers are there in UPSC Mains? Nine: two qualifying language papers (Paper A and Paper B), Essay, four General Studies papers and two optional subject papers.

How many marks are there in UPSC Mains and the final merit list? The seven counted Mains papers carry 1,750 marks. With the 275-mark interview, the final merit total is 2,025.

Do Prelims marks count in the final merit list? No. Prelims is only a screening test.

How many optional subjects does UPSC offer? There are 48 choices: 25 subjects and the literature of 23 languages, including Odia.

Are the language papers counted for ranking? No. Paper A (Indian language) and Paper B (English) are qualifying only, but you must clear them for your other papers to be evaluated.

Will the syllabus change for UPSC CSE 2027? The CSE 2027 notification is scheduled for 13 January 2027. Until it is out, the CSE 2026 scheme is the best guide. Always confirm on upsc.gov.in.

How long is the UPSC interview? The interview carries 275 marks and is a personality test for public service suitability, not just a test of facts. UPSC announces its schedule after the Mains result.

Build Your Plan Around the Syllabus

A strong UPSC preparation starts with knowing exactly what is asked and how it is marked. Download the official syllabus, mark your topics and talk to our team for a plan that fits your background. Book free counselling with RAYACADEMY IAS and explore our UPSC GS Foundation Programme to begin.

Disclaimer: This article follows the Civil Services Examination scheme and syllabus in the CSE 2026 notification, the latest available. The CSE 2027 notification is scheduled for 13 January 2027. Always verify the final syllabus, pattern and qualifying marks on the official website, upsc.gov.in.