UPSC Syllabus 2027: Complete Prelims & Mains Syllabus
The UPSC Civil Services Examination (CSE) Syllabus is the official framework prescribed by the Union Public Service Commission (UPSC) for the Preliminary Examination, Main Examination, and Personality Test. It outlines the subjects, topics, and areas from which questions are asked, helping candidates prepare in a structured and focused manner.
The UPSC syllabus is divided into three stages:
- Preliminary Examination – An objective screening test consisting of General Studies Paper I and CSAT (Paper II).
- Main Examination – A descriptive written examination comprising nine papers, including Essay, General Studies, Optional Subjects, and qualifying language papers.
- Personality Test (Interview) – The final stage that evaluates a candidate’s personality, communication skills, decision-making ability, and overall suitability for a career in the civil services.
Unlike many competitive examinations, the UPSC syllabus emphasizes conceptual understanding, analytical thinking, current affairs, and the practical application of knowledge rather than rote memorization. While the syllabus has remained largely unchanged since the 2013 restructuring, the nature and weightage of questions evolve every year, making it essential for aspirants to study the official syllabus thoroughly before beginning their preparation.
On this page, you’ll find the complete UPSC Prelims and Mains syllabus, subject-wise topics, optional subjects, downloadable syllabus PDF, and preparation tips based on the latest official UPSC syllabus.
UPSC Syllabus Highlights
| Particular | Details |
|---|---|
| Exam Name | UPSC Civil Services Examination (CSE) |
| Conducting Body | Union Public Service Commission (UPSC) |
| Exam Stages | Preliminary Examination, Main Examination & Personality Test |
| Prelims Papers | 2 (General Studies Paper I & CSAT Paper II) |
| Mains Papers | 9 Papers (2 Qualifying + 7 Merit Papers) |
| Interview Marks | 275 Marks |
| Total Mains Marks (Merit) | 1,750 Marks |
| Final Merit Marks | 2,025 Marks (1,750 Mains + 275 Interview) |
| Question Type | Objective (Prelims) & Descriptive (Mains) |
| Official Syllabus | Released by UPSC along with the Civil Services Examination Notification |
| Official Website | upsc.gov.in |
Download UPSC Syllabus PDF
The UPSC Civil Services Examination (CSE) Syllabus PDF is officially released by the Union Public Service Commission (UPSC) along with the Civil Services Examination Notification. It contains the complete syllabus for the Preliminary Examination, Main Examination, and the list of Optional Subjects prescribed by UPSC.
Candidates are strongly advised to download the official syllabus PDF before starting their preparation. Keeping a copy of the syllabus helps in planning studies, tracking progress, and ensuring that every topic is covered systematically.
You can download the latest official UPSC Syllabus PDF using the link below.
UPSC Syllabus PDF
| Document | Description | Download |
|---|---|---|
| UPSC Civil Services (CSE) Syllabus PDF | Complete Prelims & Mains Syllabus | Download PDF |
| UPSC Official Notification | Official CSE Notification | Download PDF |
Note: We recommend downloading the official UPSC syllabus PDF and referring to it regularly while preparing for the examination. This page is updated whenever UPSC revises the syllabus or releases any official changes.
UPSC Syllabus Structure
The UPSC Civil Services Examination syllabus is divided into three stages, each designed to evaluate different aspects of a candidate’s knowledge, analytical ability, and personality.
| Stage | Description |
|---|---|
| Preliminary Examination | An objective-type screening test consisting of two papers: General Studies Paper I and CSAT (Paper II). Marks obtained in the Preliminary Examination are not counted in the final merit list. |
| Main Examination | A descriptive written examination comprising nine papers, including Essay, General Studies, Optional Subject papers, and qualifying language papers. Marks obtained in the seven merit papers determine the candidate’s ranking for the next stage. |
| Personality Test (Interview) | The final stage of the selection process, where candidates are assessed on their personality, communication skills, decision-making ability, leadership qualities, and suitability for a career in the civil services. |
UPSC Prelims Syllabus
The UPSC Preliminary Examination is the first stage of the Civil Services Examination and acts as a screening test for the Main Examination. It consists of two objective-type papers: General Studies Paper I and Civil Services Aptitude Test (CSAT) Paper II. Both papers are conducted on the same day, with each paper carrying 200 marks and having a duration of 2 hours.
While the marks obtained in the Preliminary Examination are not included in the final merit list, candidates must qualify this stage to appear for the UPSC Main Examination. Additionally, CSAT (Paper II) is qualifying in nature, and candidates must secure at least 33% marks to qualify.
UPSC Prelims Exam Pattern
| Paper | Subject | Marks | Duration | Nature |
|---|---|---|---|---|
| Paper I | General Studies (GS-I) | 200 | 2 Hours | Merit Ranking |
| Paper II | CSAT (General Studies Paper II) | 200 | 2 Hours | Qualifying (Minimum 33%) |
UPSC Prelims General Studies (Paper I) Syllabus
General Studies Paper I evaluates a candidate’s awareness of current events and understanding of subjects that are important for public administration and governance. According to the official UPSC syllabus, the following topics are covered:
| Subject | Topics Covered |
|---|---|
| Current Events | Current events of national and international importance. |
| History | History of India and the Indian National Movement. |
| Geography | Indian and World Geography – Physical, Social, and Economic Geography of India and the World. |
| Polity & Governance | Indian Constitution, Political System, Panchayati Raj, Public Policy, Rights Issues, and Governance. |
| Economic & Social Development | Sustainable Development, Poverty, Inclusion, Demographics, Social Sector Initiatives, and related topics. |
| Environment & Ecology | General issues on Environmental Ecology, Biodiversity, and Climate Change that do not require subject specialization. |
| Science & Technology | General Science and recent developments in Science & Technology. |
UPSC CSAT (Paper II) Syllabus
The Civil Services Aptitude Test (CSAT) is designed to assess a candidate’s aptitude, reasoning ability, analytical skills, and decision-making capabilities. Although it is a qualifying paper, aspirants should prepare seriously to secure the minimum qualifying marks.
The official UPSC CSAT syllabus includes the following topics:
| Topic | Description |
|---|---|
| Comprehension | Reading passages and answering questions based on them. |
| Interpersonal Skills | Communication and interpersonal relationship skills. |
| Logical Reasoning | Logical reasoning and analytical ability. |
| Decision Making | Decision-making and problem-solving abilities. |
| General Mental Ability | Basic aptitude and analytical thinking. |
| Basic Numeracy | Numbers, percentages, averages, ratio & proportion, profit & loss, time & work, and other Class X level mathematics. |
| Data Interpretation | Charts, graphs, tables, and data analysis (Class X level). |
| English Language Comprehension* | Questions based on English passages (*if included as per the official notification). |
Note: Negative marking is applicable in both General Studies Paper I and CSAT. One-third (1/3) of the marks assigned to a question are deducted for every incorrect answer.
UPSC Mains Syllabus
The UPSC Main Examination is the second stage of the Civil Services Examination and plays a decisive role in the final selection. Unlike the Preliminary Examination, the Mains consists of descriptive (written) papers that assess a candidate’s analytical ability, conceptual understanding, writing skills, and depth of knowledge across various subjects.
The UPSC Mains Examination comprises nine papers, of which two are qualifying papers and seven papers are counted for merit ranking. Candidates who qualify the Preliminary Examination are eligible to appear for the Mains.
UPSC Mains Exam Pattern
| Paper | Subject | Marks | Nature |
|---|---|---|---|
| Paper A | Indian Language (Qualifying) | 300 | Qualifying |
| Paper B | English (Qualifying) | 300 | Qualifying |
| Paper I | Essay | 250 | Merit |
| Paper II | General Studies I | 250 | Merit |
| Paper III | General Studies II | 250 | Merit |
| Paper IV | General Studies III | 250 | Merit |
| Paper V | General Studies IV | 250 | Merit |
| Paper VI | Optional Subject Paper I | 250 | Merit |
| Paper VII | Optional Subject Paper II | 250 | Merit |
| Total (Merit Papers) | 1,750 Marks |
Qualifying Papers (Paper A & Paper B)
The first two papers of the UPSC Main Examination are qualifying in nature. Candidates must secure the minimum qualifying marks prescribed by UPSC in both papers. However, the marks obtained in these papers are not included in the final merit list.
| Paper | Purpose |
|---|---|
| Paper A – Indian Language | Tests reading comprehension, precise writing, grammar, essay writing, and translation skills in one of the languages listed in the Eighth Schedule of the Constitution. |
| Paper B – English | Evaluates English comprehension, vocabulary, grammar, précis writing, and effective communication skills. |
Note: Candidates belonging to certain states in the North-East are exempted from appearing for the Indian Language paper as per UPSC rules.
Essay Paper (Paper I)
The Essay paper is designed to evaluate a candidate’s ability to express ideas in a clear, logical, and coherent manner. Candidates are required to write essays on multiple topics chosen from a list provided by UPSC.
The paper assesses:
- Clarity of thought
- Logical reasoning
- Analytical ability
- Presentation and structure
- Language and communication skills
There is no fixed syllabus for the Essay paper. Candidates are expected to write balanced, well-structured essays based on social, political, economic, philosophical, environmental, and international issues.
General Studies Paper I Syllabus
General Studies Paper I focuses on India’s heritage, history, geography, and society.
| Topics Covered |
|---|
| Indian Heritage and Culture |
| History of Modern India |
| Indian Freedom Struggle |
| Post-Independence Consolidation |
| World History |
| Indian Society and Diversity |
| Role of Women and Social Issues |
| Globalization and Urbanization |
| Physical Geography of India and the World |
| Distribution of Natural Resources |
| Geophysical Phenomena such as Earthquakes, Tsunami, Volcanoes, and Climate |
General Studies Paper II Syllabus
This paper focuses on governance, the Constitution, polity, social justice, and international relations.
| Topics Covered |
|---|
| Indian Constitution |
| Parliament and State Legislatures |
| Executive and Judiciary |
| Federal Structure |
| Governance and Public Policy |
| Welfare Schemes |
| NGOs and Self-Help Groups |
| Social Justice |
| International Relations |
| Bilateral and Multilateral Agreements |
General Studies Paper III Syllabus
General Studies Paper III covers the economy, agriculture, science & technology, environment, disaster management, and internal security.
| Topics Covered |
|---|
| Indian Economy |
| Inclusive Growth |
| Government Budgeting |
| Agriculture |
| Science & Technology |
| Environment and Biodiversity |
| Disaster Management |
| Internal Security |
| Cyber Security |
| Infrastructure and Investment Models |
General Studies Paper IV Syllabus
General Studies Paper IV evaluates ethics, integrity, and aptitude required for public service.
| Topics Covered |
|---|
| Ethics and Human Interface |
| Attitude |
| Aptitude and Emotional Intelligence |
| Contributions of Moral Thinkers |
| Public Service Values |
| Probity in Governance |
| Case Studies on Ethics |
Optional Subject Papers (Paper VI & VII)
Candidates must choose one optional subject from the list prescribed by UPSC. The selected optional subject consists of two papers, each carrying 250 marks, making a total of 500 marks.
The optional subject allows candidates to demonstrate in-depth knowledge in their chosen discipline and often plays a significant role in improving the overall Mains score. UPSC offers a wide range of optional subjects from humanities, science, engineering, literature, commerce, and other academic fields.
Note: The detailed syllabus for each optional subject is published separately by UPSC. Candidates should refer to the official syllabus before selecting an optional subject.
UPSC Optional Subjects List
The Optional Subject is one of the most important components of the UPSC Main Examination. Every candidate is required to choose one optional subject, which consists of two papers (Paper VI and Paper VII) carrying 250 marks each, making a total of 500 marks.
The choice of an optional subject can significantly influence a candidate’s final score in the Mains Examination. Therefore, candidates should select a subject based on their academic background, interest, availability of study material, previous performance, and overall preparation strategy rather than following trends or popularity.
UPSC currently offers 48 optional subjects, including literature subjects, humanities, commerce, engineering, medical sciences, and science disciplines.
List of UPSC Optional Subjects
| Subject | Subject | Subject |
|---|---|---|
| Agriculture | History | Physics |
| Animal Husbandry & Veterinary Science | Law | Political Science & International Relations |
| Anthropology | Management | Psychology |
| Botany | Mathematics | Public Administration |
| Chemistry | Mechanical Engineering | Sociology |
| Civil Engineering | Medical Science | Statistics |
| Commerce & Accountancy | Philosophy | Zoology |
| Economics | Geography | Electrical Engineering |
| English Literature | Geology | Electronics & Telecommunication Engineering |
| Hindi Literature | Kannada Literature | Tamil Literature |
| Urdu Literature | Marathi Literature | Telugu Literature |
| Bengali Literature | Malayalam Literature | Sanskrit Literature |
| Gujarati Literature | Odia Literature | Sindhi Literature |
| Punjabi Literature | Assamese Literature | Maithili Literature |
Tip: Choosing the right optional subject is an important decision. Before making your choice, consider your interest in the subject, overlap with the General Studies syllabus, availability of study material, and your ability to write descriptive answers consistently.
How to Choose the Right Optional Subject?
Selecting the right optional subject is a strategic decision that can improve your overall Mains score. While there is no universally “best” optional subject, candidates should evaluate a few key factors before making a choice.
- Choose a subject that genuinely interests you.
- Prefer a subject you have studied during graduation or are comfortable learning.
- Check the overlap with the General Studies syllabus to reduce preparation time.
- Ensure quality study material, previous year papers, and guidance are easily available.
- Review previous years’ question papers to understand the difficulty level and question trends.
- Focus on a subject that you can revise multiple times before the examination
Recommended: Before finalizing your optional subject, compare the syllabus, previous year question papers, and preparation resources for each subject to make an informed decision.
Preparation Tips for Covering the UPSC Syllabus
Completing the UPSC syllabus requires a well-planned strategy rather than studying multiple books without direction. Since the syllabus is extensive and covers diverse subjects, candidates should divide their preparation into manageable phases and revise consistently. Understanding the syllabus before selecting study material helps avoid unnecessary topics and keeps preparation focused on the examination requirements.
Follow these practical tips to complete the UPSC syllabus effectively:
- Understand the syllabus thoroughly before starting your preparation and keep a printed copy for regular reference.
- Break the syllabus into smaller sections and prepare a monthly and weekly study plan.
- Study standard reference books instead of multiple sources for the same subject.
- Read newspapers and current affairs daily to connect static topics with current events.
- Solve Previous Year Question Papers (PYQs) to understand the type and trend of questions asked by UPSC.
- Practice answer writing regularly for the Main Examination to improve analytical and writing skills.
- Attempt mock tests for both Prelims and Mains to evaluate your preparation level.
- Revise frequently, as multiple revisions are essential for retaining concepts and improving recall.
Preparation Tip: Always keep the official UPSC syllabus beside you while studying. If a topic is not mentioned in the syllabus, avoid spending excessive time on it.
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Best Books for UPSC Syllabus Preparation
Choosing the right books is essential for covering the UPSC syllabus efficiently. Instead of referring to multiple resources, candidates should focus on standard books that are widely recommended by successful aspirants and experts.
| Subject | Recommended Book |
|---|---|
| History | India’s Struggle for Independence – Bipan Chandra |
| Indian Polity | Indian Polity – M. Laxmikanth |
| Geography | Certificate Physical and Human Geography – G.C. Leong |
| Economy | Indian Economy – Ramesh Singh |
| Environment | Environment – Shankar IAS |
| Art & Culture | Indian Art and Culture – Nitin Singhania |
| Ethics | Lexicon for Ethics, Integrity & Aptitude |
| Current Affairs | The Hindu, PIB, Yojana, Kurukshetra |
Frequently Asked Questions (FAQs)
What is the latest UPSC Syllabus?
The latest UPSC Civil Services Examination (CSE) syllabus is prescribed by the Union Public Service Commission (UPSC) and covers three stages: the Preliminary Examination, Main Examination, and Personality Test (Interview). The syllabus has remained largely unchanged in recent years, though candidates should always refer to the latest official notification for any updates.
Is the UPSC syllabus the same every year?
Yes. The UPSC syllabus generally remains the same and does not change every year. However, the nature, difficulty level, and focus of questions may vary. Candidates should regularly check the official UPSC notification for any revisions.
How many papers are there in the UPSC Preliminary Examination?
The UPSC Preliminary Examination consists of two papers:
General Studies Paper I
CSAT (General Studies Paper II)
Both papers carry 200 marks, but CSAT is qualifying in nature and requires a minimum of 33% marks to qualify.
How many papers are there in the UPSC Main Examination?
The UPSC Main Examination consists of nine papers, including:
One Indian Language Paper (Qualifying)
One English Language Paper (Qualifying)
Essay Paper
Four General Studies Papers
Two Optional Subject Papers
Out of these, seven papers are counted for merit, carrying a total of 1,750 marks.
Does UPSC ask questions outside the syllabus?
UPSC primarily frames questions based on the official syllabus. However, many questions require analytical thinking and an understanding of current affairs, making it important to develop conceptual clarity rather than relying solely on memorization.
Is the CSAT paper qualifying?
Yes. CSAT (General Studies Paper II) is a qualifying paper. Candidates must score at least 33% marks to qualify. Only the marks obtained in General Studies Paper I are considered for the Preliminary Examination merit list.
Which subjects are included in the UPSC Prelims syllabus?
The UPSC Prelims syllabus includes:
Current Affairs
History
Geography
Indian Polity
Economy
Environment & Ecology
Science & Technology
These subjects are covered under General Studies Paper I.
Which subjects are included in the UPSC Mains syllabus?
The UPSC Mains syllabus covers:
Essay
Indian Heritage & Culture
History
Geography
Constitution & Governance
Social Justice
International Relations
Economy
Agriculture
Science & Technology
Environment
Disaster Management
Internal Security
Ethics, Integrity & Aptitude
Optional Subject
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Where can I download the official UPSC Syllabus PDF?
Candidates can download the official UPSC Civil Services Examination syllabus PDF from this page or from the official UPSC website. The syllabus is published along with the Civil Services Examination Notification.
Which books should I study to complete the UPSC syllabus?
Candidates should begin with NCERT textbooks for building conceptual clarity and then refer to standard books such as Indian Polity by M. Laxmikanth, India’s Struggle for Independence by Bipan Chandra, Indian Economy by Ramesh Singh, and Environment by Shankar IAS. The choice of books may vary depending on the subject and preparation strategy.
Related UPSC Guides
Continue your UPSC preparation with our detailed guides covering every stage of the Civil Services Examination.
| Guide | What You’ll Learn |
|---|---|
| UPSC Notification | Latest notification, important dates, vacancies, and official PDF. |
| UPSC Eligibility | Nationality, educational qualification, age limit, and eligibility criteria. |
| UPSC Age Limit | Category-wise age limits, relaxations, and number of attempts. |
| UPSC Exam Pattern | Complete Prelims, Mains, and Interview pattern with marking scheme. |
| UPSC Preparation Strategy | Study plans, preparation tips, revision techniques, and expert guidance. |
| UPSC Books | Subject-wise recommended books for Prelims and Mains. |
| UPSC Previous Year Question Papers | Download previous years’ papers with preparation benefits. |
| UPSC Mock Tests | Practice mock tests to improve speed, accuracy, and exam readiness. |
| UPSC Current Affairs | Daily and monthly current affairs important for the examination. |
| UPSC Admit Card | Latest updates on admit card release and download process. |
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