Compulsory Subjects for UPSC Exam 2026, IAS Subjects List for Prelims and Mains
Compulsory subjects for UPSC exam are essential subjects that every candidate must attempt in the Civil Services Examination. Find the comprehensive list of compulsory subjects for UPSC Prelims and Mains.
Sheetal Gaur16 Feb, 2026
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The Union Public Service Commission (UPSC) has officially outlined the compulsory subjects for the 2026 Civil Services Examination, emphasizing a comprehensive grasp of General Studies, Ethics, and Language proficiency. For the 2026 cycle, the UPSC Prelims is scheduled for May 24, 2026, followed by the Mains examination beginning on August 21, 2026. Prospective IAS officers must navigate a rigorous syllabus that spans from Ancient Indian History to cutting-edge Science and Technology. Mastering these core subjects is essential for clearing the three-stage selection process and securing a rank among the approximately 933 vacancies announced.
List of Compulsory Subjects for UPSC Exam 2026
The UPSC CSE tests a candidate's knowledge, analytical abilities, and aptitude for a career in civil services. It consists of three stages, Prelims, Mains, and Personality Test (Interview). Understanding the compulsory subjects for each stage is crucial for aspirants to structure their preparation effectively.Compulsory Subjects for UPSC Prelims 2026
The UPSC Preliminary Examination is the first stage of the Civil Services Examination. It consists of two compulsory papers: General Studies Paper-I and General Studies Paper-II (CSAT). General Studies Paper-I This paper tests candidates on subjects like Indian History, Geography, Economy, Politics, Environmental Science, and General Science. Its syllabus includes:- Current Affairs: National and international importance.
- History: Indian history and Indian national movement.
- Geography: Physical, social, and economic geography of India and the world.
- Polity: Indian polity and governance.
- Economy: Economic and social development.
- Environment: General issues on environmental ecology, biodiversity, and climate change.
- General Science: Basic science concepts and applications.
- Comprehension: Reading and understanding passages
- Logical Reasoning: Analyzing logical arguments
- Analytical Ability: Data interpretation and analysis
- Decision Making: Problem-solving and decision-making skills
- General Mental Ability: Basic numeracy and data interpretation
| Paper | Subjects Covered | Total Marks | Time Allotted |
|---|---|---|---|
| General Studies I | History, Geography, Polity, Economy, Environment | 200 | 2 Hours |
| General Studies II (CSAT) | Logical Reasoning, Quantitative Aptitude, English Comprehension | 200 | 2 Hours |
Compulsory Subjects for UPSC Mains 2026
The UPSC Mains Examination is the second stage and is more comprehensive, focusing on in-depth knowledge. It consists of nine papers, including four general studies papers, one essay paper, two language papers, and two optional papers. While all papers are compulsory, the marks in seven compulsory subjects for UPSC mains (except Qualifying papers) will determine your rank and final selection.| Paper | Subject Area | Topics |
| Paper A (Qualifying) | Indian Language | You will need to write two essays from a given set of topics. |
| Paper B (Qualifying) | English | Comprehension, Precis Writing, Usage and Vocabulary, and Short Essays |
| Paper I (Compulsory) | Essay | Writing essays on multiple topics |
| Paper II (Compulsory) | General Studies I | Indian Heritage and Culture, Art forms, literature, and architecture, Modern Indian history, world history, Geography, Physical, social, and economic geography |
| Paper III (Compulsory) | General Studies II | Governance, Constitution and Polity, Social Justice, International Relations |
| Paper IV (Compulsory) | General Studies III | Technology, Economic Development, Biodiversity and Environment, Security, and Disaster Management |
| Paper V (Compulsory) | General Studies IV | Ethics, Integrity, Aptitude |
| Paper VI | Optional Paper I | Subject of Choice |
| Paper VII | Optional Paper II | Subject of Choice |
How to Prepare for Compulsory Subjects in UPSC?
Understanding the compulsory subjects for the UPSC exam is essential for effective preparation. Here we have provided tips to help students navigate the UPSC syllabus effectively.- Understand the Syllabus: Familiarize yourself with the detailed syllabus for each paper.
- Refer to Standard Books: Use recommended books and resources for comprehensive coverage.
- Make Notes: Create concise and organized notes for quick revision.
- Practice Answer Writing: Regularly practice writing answers to improve clarity and speed.
- Stay Updated with Current Affairs: Read newspapers and magazines to stay informed about current events.
- Join Test Series: Enroll in a test series to evaluate your preparation and improve your performance.
To ensure you are on the right track, explore the comprehensive PW UPSC Courses. They are designed to guide you through the syllabus, offering mentorship to help you!
Compulsory Subjects for UPSC 2026 FAQs
How many subjects are compulsory in UPSC Mains?
In UPSC Mains, 7 subjects are compulsory, including General Studies, Essay, and two qualifying language papers. Rest two can be selected from the list of 48 subjects.
Is CSAT a qualifying paper?
Yes, CSAT is a qualifying paper in the UPSC Prelims, requiring a minimum of 33% to pass.
Can I choose any language for the Indian Language paper in UPSC Mains?
Yes, you can choose any language listed in the Eighth Schedule of the Indian Constitution for the Indian Language paper.
Can I choose my optional subject?
Yes, in UPSC Mains, you can choose your optional subject from a list of over 48 subjects provided by the UPSC.
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