UPSC Syllabus 2026: Complete Prelims and Mains Syllabus Paper by Paper
Komal Gupta
UPSC Exam Expert & Content Editor
Table of Contents
- 1.Why the Syllabus Is the Most Important Document
- 2.Prelims Paper I: General Studies
- 3.Prelims Paper II: CSAT
- 4.Mains: Essay
- 5.Mains: General Studies Papers
- 6.Mains: Optional Subject
- 7.Qualifying Language Papers
- 8.Interview: Personality Test
- 9.How to Study the Syllabus Smartly
- 10.Common Mistakes
- 11.A 12-Month Plan to Cover the Syllabus
- 12.Using Previous Year Questions to Read the Syllabus
- 13.Key Takeaways
- 14.Frequently Asked Questions (FAQ)
UPSC syllabus 2026 explained paper by paper: Prelims GS and CSAT, Mains Essay, GS I to IV, optional and language papers, a topic table, smart study plan and 12 FAQs.
Quick answer: The UPSC syllabus has two big parts. The Prelims syllabus covers General Studies Paper I (current events, history, geography, polity, economy, environment and general science) and CSAT Paper II (comprehension, reasoning, basic numeracy and data interpretation). The Mains syllabus covers an Essay, four General Studies papers (GS I to GS IV), one Optional Subject with two papers, and two qualifying language papers. This guide explains each paper topic by topic, in simple language, with a table of themes and tips to study the syllabus smartly. For the official text, always read the notification and the syllabus on upsc.gov.in.
Why the Syllabus Is the Most Important Document
The UPSC syllabus is broad but it is also precise. Every successful candidate keeps a printed copy and returns to it again and again. It tells you what to read and, more importantly, what not to read. Your notes, books and coaching material should map to the syllabus; if a topic does not link to any line of the syllabus, think twice before spending time on it. A good habit is to tick each line of the syllabus when you finish it, and to write the sources (book, newspaper section, report) next to it.
Prelims Paper I: General Studies
| Area | Main topics |
|---|---|
| Current events | Events of national and international importance, in the last 12 to 18 months |
| History of India and the national movement | Ancient, medieval and modern history, art and culture, freedom struggle |
| Indian and world geography | Physical, social and economic geography of India and the world |
| Indian polity and governance | Constitution, political system, Panchayati Raj, public policy, rights issues |
| Economic and social development | Sustainable development, poverty, inclusion, demographics, social sector initiatives |
| Environment | Biodiversity, climate change, ecology, conservation (general issues, no specialisation required) |
| General science | Physics, chemistry and biology at a general level, with technology-related developments |
Prelims questions are factual and conceptual, and they increasingly test understanding and the application of ideas rather than rote facts. Static subjects such as polity, geography and economy should be linked with current affairs. For example, a news item about a new Ramsar site is linked with environment and geography.
Prelims Paper II: CSAT
The CSAT includes 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, class X level) and data interpretation (charts, graphs, tables, data sufficiency, class X level), and English language comprehension skills (class X level). The paper is qualifying: 33 percent is required. Reading comprehension carries the largest share, so reading practice is crucial.
Mains: Essay
Candidates have to write essays on multiple topics from two sections. They are expected to keep closely to the subject of the essay, arrange their ideas in an orderly fashion and write concisely. Credit is given for effective and exact expression. The topics range across philosophical statements, social and economic issues, technology, environment and governance.
Mains: General Studies Papers
| Paper | Theme | Main areas |
|---|---|---|
| GS I | Indian Heritage and Culture, History and Geography of the World and Society | Art forms, literature and architecture; modern Indian history from about the middle of the eighteenth century; freedom struggle; post-independence consolidation; world history (industrial revolution, world wars, decolonisation); Indian society, diversity, women, population, poverty, globalisation; salient features of world physical geography; geophysical phenomena; distribution of resources; industrial location |
| GS II | Governance, Constitution, Polity, Social Justice and International Relations | Constitution and its features; functions of the Union and States; separation of powers; Parliament and State Legislatures; judiciary; statutory and regulatory bodies; government policies; development processes; welfare schemes for vulnerable sections; health, education, human resources; poverty and hunger; transparency and accountability; e-governance; role of civil services; India and its neighbourhood; bilateral, regional and global groupings; Indian diaspora; international institutions |
| GS III | Technology, Economic Development, Biodiversity, Environment, Security and Disaster Management | Indian economy: planning, resources, growth, inclusive growth, budgeting; agriculture, subsidies, MSP, food processing, land reforms; infrastructure; science and technology developments, space, IT, biotechnology, IPR; conservation, environmental pollution, EIA; disaster management; internal security challenges: terrorism, extremism, border management, cyber security, money laundering, organised crime |
| GS IV | Ethics, Integrity and Aptitude | Ethics and human interface; attitude; aptitude and foundational values for civil service; emotional intelligence; contributions of moral thinkers; public/civil service values and ethics in public administration; probity in governance; case studies |
These papers carry 250 marks each. The syllabus is long, but the questions follow clear themes. A smart plan is to divide the syllabus into 25 to 30 blocks, assign weeks to each block, link every block with a sample of the previous years' questions, and revise them regularly with the help of current affairs.
Mains: Optional Subject
The candidate selects one optional subject out of the list given by the Commission, which includes subjects such as agriculture, anthropology, geography, history, law, management, mathematics, political science and international relations, public administration, sociology and literature of various languages. The optional has two papers, each of 250 marks, so the total is 500 marks. The syllabus of each optional is given separately in the notification. Choose it by interest, background, availability of guidance and overlap with GS, not just by rank data from earlier years.
Qualifying Language Papers
Paper A (Indian language) and Paper B (English) are of matriculation or equivalent standard. They test comprehension of passages, precis writing, usage and vocabulary, short essays, and translation between English and the Indian language. Candidates must score at least 25 percent in each. Although these are qualifying, a failure in either paper means the other papers will not be evaluated, so practise them well.
Interview: Personality Test
The interview does not have a prescribed syllabus. It tests the candidate's overall personality: knowledge of current affairs, understanding of their own background in the Detailed Application Form, opinions on social and national issues, honesty and clarity in answering. Preparation consists of reading newspapers, reflecting on the DAF, and practising mock interviews.
How to Study the Syllabus Smartly
Begin with the NCERT books of Class 6 to 12 to build a base for history, geography, polity, economy and science. Then move to standard books for each subject and to a good newspaper for current affairs. For each topic, keep a short note, a map or flowchart if needed, and a few sample questions. Make a link between Prelims and Mains: the same topic is studied once at the conceptual level and then revised for the analytical level of Mains. Take weekly tests to check progress, and revise every month. Avoid collecting too many resources. The mantra is "one source, many revisions".
Common Mistakes
Candidates often start without reading the syllabus, spend too much time on one subject, ignore current affairs, delay answer writing, or choose an optional because of someone else's advice. Another mistake is reading beyond the depth required, such as studying economics at the level of a postgraduate course when only a general understanding is needed. Always ask whether the topic is in the syllabus and whether it has appeared in previous papers.
A 12-Month Plan to Cover the Syllabus
A simple year plan helps you to finish the syllabus without panic. In the first three months, read NCERTs and build a base in history, geography, polity, economy and science, while starting daily newspaper reading. In months four to six, move to standard books and make short notes, and begin weekly answer writing for the GS papers. In months seven to nine, complete the optional subject, take sectional tests and revise the static portions with current affairs. In the last three months before Prelims, focus on revision, previous year papers and full-length mock tests, while keeping a little time for answer writing. After the Prelims, shift gears fully to Mains: write at least one test every few days, polish your essay and ethics answers, and revise the optional. This plan can be adjusted according to your starting point, but the sequence of base, depth, revision and tests remains the same.
Using Previous Year Questions to Read the Syllabus
The syllabus is written in broad lines, so previous year questions show how the Commission converts a line into a question. For example, the line "Indian Heritage and Culture" can produce questions on temple architecture, dance forms, painting schools or Buddhist art. The line "Environment" often leads to questions on species, protected areas, international conventions and climate. Solve the last ten years' papers topic-wise after you finish each block of the syllabus, and note the type of questions, the level of detail and the trend. This will keep you from studying too little or too much, and will show you the topics of high frequency.
Key Takeaways
- Prelims: GS Paper I (merit) and CSAT (qualifying, 33 percent).
- Mains: Essay, GS I to IV, Optional (two papers) and two qualifying language papers.
- No fixed syllabus for the Interview; it tests personality and awareness.
- Download the official syllabus and tick topics as you finish them.
The syllabus is your compass. Study it carefully, plan your preparation around it and revise it constantly, so that your efforts always go in the right direction.
Frequently Asked Questions (FAQ)
What is the UPSC Prelims syllabus?
The Prelims syllabus has General Studies Paper I covering current events, history, geography, polity, economy, environment and general science, and CSAT Paper II covering comprehension, reasoning and basic numeracy.
What is the UPSC Mains syllabus?
The Mains syllabus has an Essay paper, four General Studies papers, an optional subject with two papers, and two qualifying language papers.
What is covered in GS Paper 1 of Mains?
GS Paper I covers Indian heritage and culture, modern Indian and world history, Indian society and world and Indian geography.
What is covered in GS Paper 2 of Mains?
GS Paper II covers governance, Constitution, polity, social justice and international relations.
What is covered in GS Paper 3 of Mains?
GS Paper III covers the Indian economy, agriculture, science and technology, environment, disaster management and internal security.
What is covered in GS Paper 4 of Mains?
GS Paper IV covers ethics, integrity and aptitude, including case studies.
Is there a syllabus for the UPSC Interview?
No. The Interview has no fixed syllabus. It tests the personality, awareness and the details in the candidate’s application form.
Is CSAT included in the final ranking?
No. CSAT is a qualifying paper. A candidate needs at least 33 percent, but the marks are not counted for the cut-off.
How do I choose the optional subject?
Choose the optional by your interest, academic background, overlap with GS, availability of guidance and study material, and not only by past results.
Where can I get the official UPSC syllabus?
The official syllabus is given in the Civil Services Examination notification on the UPSC website, upsc.gov.in.
Do I have to study all topics in the UPSC syllabus?
Yes, but at the required depth. Focus on the syllabus lines and previous year questions rather than reading everything on a subject.
What are the language papers in UPSC Mains?
Paper A is a compulsory Indian language paper and Paper B is English. Both are qualifying papers requiring at least 25 percent marks.
Komal Gupta
UPSC Exam Expert & Content Editor
Komal is a senior UPSC exam strategist with 8+ years of experience helping aspirants crack CSE, CDS and NDA exams. She writes in-depth notification breakdowns, exam pattern guides and preparation strategies.