UPSC Prelims Syllabus 2026: GS Paper I and CSAT, Subject-Wise
The complete UPSC prelims syllabus for 2026 - GS Paper I subjects, CSAT topics, exam pattern, negative marking and how to plan preparation around it.
The UPSC prelims syllabus for 2026 covers two papers: General Studies Paper I (100 questions, 200 marks) and CSAT Paper II (80 questions, 200 marks, qualifying at 33%). Both papers are held on the same day, and only Paper I marks decide who clears the cutoff for the mains. This guide breaks down the full UPSC prelims syllabus topic by topic, explains the exam pattern and marking scheme, and shows you how to plan your preparation around it.
All facts below come from the official UPSC Civil Services Examination 2026 notification (Notice 05/2026-CSE) published on upsc.gov.in. Always cross-check the latest notification PDF on the UPSC website before applying, because the commission can revise details through corrigenda.
Exam pattern at a glance
| Paper | Questions | Marks | Duration | Counts for cutoff? |
|---|---|---|---|---|
| GS Paper I | 100 | 200 | 2 hours | Yes |
| CSAT (Paper II) | 80 | 200 | 2 hours | No - qualifying at 33% (66 marks) |
Both papers are objective (multiple choice). There is negative marking: one-third of the marks assigned to a question are deducted for every wrong answer. The 2026 prelims is scheduled for 24 May 2026, and applications closed on 24 February 2026.
GS Paper I: subject-wise syllabus
Paper I tests seven broad areas. The notification describes them in one paragraph each, but years of papers show a stable pattern in how questions are distributed.
History and art & culture
Ancient, medieval and modern Indian history, with the freedom struggle getting the most questions. Art and culture - architecture, paintings, dance forms, UNESCO sites - now appears almost every year.
Indian and world geography
Physical, social and economic geography of India and the world. Map-based questions on rivers, passes, national parks and neighbouring countries are common.
Polity and governance
The Constitution, Parliament, judiciary, Panchayati Raj, constitutional bodies and recent amendments. Laxmikanth covers most of what is asked.
Economy
Basic concepts (GDP, inflation, fiscal and monetary policy), the Union Budget, banking and government schemes. Current economic developments matter more than theory.
Environment and ecology
Biodiversity, climate change conventions, protected areas and pollution. This section has grown steadily over the last decade.
General science and technology
Everyday applications of physics, chemistry and biology, plus space missions, defence systems and biotech in the news.
Current affairs
Events of national and international importance from roughly the last 12-18 months. Questions increasingly link current events to static topics.
CSAT Paper II: what to prepare
CSAT tests comprehension, interpersonal and communication skills, logical reasoning and analytical ability, decision-making, basic numeracy (Class 10 level) and data interpretation (charts, graphs, tables, Class 10 level). You need only 66 of 200 marks, but every year thousands of candidates fail CSAT while clearing GS Paper I, so do not ignore it if your maths or reading speed is weak.
How to plan preparation around the syllabus
- Finish NCERT books (Class 6-12) for history, geography, economy and science before touching reference books.
- Read one newspaper daily and make short notes linked to syllabus headings.
- Solve at least 10 years of previous prelims papers; UPSC repeats themes more often than questions.
- Attempt mock tests for CSAT every week from three months before the exam.
- Revise polity and economy first - they carry the most predictable marks.
If you are also preparing for other government exams, note how the prelims differs from the SSC CGL syllabus, which has a very different structure and difficulty level. Choosing between exam tracks is a career decision too; our guide on government job vs private job can help you think it through.
Sources
- UPSC Civil Services Examination 2026 notification (Notice 05/2026-CSE), upsc.gov.in - exam pattern, dates, eligibility
- UPSC official website, syllabus appendix - subject areas for both prelims papers
Verify every detail against the official notification PDF on upsc.gov.in before applying; corrigenda can change dates, vacancies or conditions.
Frequently asked questions
How many papers are there in UPSC prelims 2026?
Two: GS Paper I (200 marks, decides the cutoff) and CSAT Paper II (200 marks, qualifying at 33%).
Is there negative marking in UPSC prelims?
Yes. One-third of the marks assigned to a question are deducted for a wrong answer.
What is the CSAT qualifying mark?
33%, which is 66 out of 200 marks.
When is the UPSC prelims 2026 exam?
24 May 2026, as per the official notification.
Does UPSC change the prelims syllabus every year?
No. The broad syllabus has stayed stable for years; only current affairs shift. Always read the latest notification to confirm.
