UPSC CSE syllabus and exam pattern
The UPSC Civil Services Examination runs in three stages — a qualifying preliminary examination, a nine-paper main examination of which seven count towards merit, and a personality test. This guide sets out the exam pattern with marks and duration, the syllabus of each paper, and how to plan prelims and mains preparation without losing a year.
UPSC CSE exam pattern: prelims, mains and interview
| Paper / stage | What it covers | Marks | Duration |
|---|---|---|---|
| Prelims — GS Paper I | 100 objective questions. History, Indian national movement, geography, polity and governance, economy, environment and ecology, general science and current events. | 200 | 2 hours |
| Prelims — GS Paper II (CSAT) | 80 objective questions. Comprehension, logical reasoning, decision making, basic numeracy and data interpretation. Qualifying at 33%. | 200 | 2 hours |
| Mains — Paper A and Paper B | Indian language and English. Qualifying only; marks are not counted in the merit list. | 300 each | 3 hours each |
| Mains — Essay | Two essays from separate sections, tested on structure, balance and clarity of thought. | 250 | 3 hours |
| Mains — GS I to GS IV | GS I heritage, history, geography and society; GS II polity, governance, social justice and international relations; GS III economy, agriculture, science and technology, environment, security and disaster management; GS IV ethics, integrity and aptitude with case studies. | 250 each | 3 hours each |
| Mains — Optional Paper I and II | One optional subject chosen from the commission's list, examined in two papers. | 250 each | 3 hours each |
| Personality Test (interview) | Detailed Application Form based discussion, current affairs, opinion and administrative judgement. | 275 | — |
Mains merit is decided by the seven counted papers (1750 marks) plus the personality test (275 marks). Paper A and Paper B are qualifying. Always confirm marks, the optional subject list and eligibility from the latest official UPSC notification for your attempt year.
Prelims is a filter — treat accuracy as the skill
Prelims marks do not carry into the final merit list. Its only job is to qualify you, so the target is a reliable score above the cut-off, not a record score.
There is negative marking of one third of the marks for each wrong answer, which makes attempt strategy decisive. Most successful candidates attempt roughly 80–90 questions in GS Paper I with high accuracy rather than all 100 on guesswork.
The aptitude paper needs only 33% but every year candidates fail it for lack of practice. Solve two CSAT papers a month in full exam conditions.
Mains is an answer-writing exam
Seven papers count towards merit — Essay, GS I to GS IV, and the two optional papers — so 1750 marks are decided by how you write, not how much you have read.
Practise in the real format: 10-mark answers in about 150 words and 15-mark answers in about 250 words, with headings, a diagram or map where relevant, and a forward-looking conclusion.
Link every GS III and GS II answer to a current example — a scheme, a committee report, a Supreme Court judgment or an economic survey figure. Generic answers score average marks.
Choosing and handling the optional subject
Choose the optional you can sustain for two years: availability of material, overlap with GS, and your own comfort with the subject matter matter more than any reputation for high marks.
Finish the optional syllabus once before prelims. Candidates who postpone it until after prelims lose the two months they need for answer practice.
Maintain one consolidated note per optional topic, updated with previous year questions, rather than several parallel sources.
A twelve-month preparation rhythm
Months 1–5: complete the core GS syllabus with standard sources, keep a monthly current affairs note, and finish one pass of your optional subject.
Months 6–8: prelims mode — full-length objective mocks every week, previous year papers, and revision of factual areas such as polity, environment and economy.
Months 9–12: mains mode — daily answer writing, sectional tests, essay practice every fortnight, and full-length mains mocks with evaluation.
UPSC CSE preparation checklist
- Confirm the current pattern and optional list from the latest UPSC Civil Services notification
- Target accuracy in prelims, not maximum attempts — one third negative marking applies
- Do not skip CSAT practice; it qualifies at 33% but fails unprepared candidates
- Write answers daily in the 150 and 250 word formats from month one of mains preparation
- Keep one consolidated current affairs note per month and revise it twice
Practise under real exam conditions
Attempt UPSC-pattern mock tests on क्रांति with sectional timing, topic-wise accuracy, time-per-question analysis and a percentile against other aspirants.