CSAT (Civil Services Aptitude Test) is General Studies Paper II of the UPSC Preliminary Examination for CSE 2027 (Prelims on 23 May 2027). It is a qualifying paper — you need a minimum of 33% (typically 66 out of 200 marks) to remain eligible for Mains, but CSAT marks do not count toward your Prelims rank. That distinction leads many aspirants to under-prepare CSAT, and every year candidates with strong GS Paper I scores fail because they missed the CSAT threshold. The syllabus is published in the annual notification on upsc.gov.in.
Key highlights
- 80 MCQs, 200 marks, 2 hours — conducted the same afternoon as GS Paper I.
- 33% qualifying threshold — typically 80/200 marks required.
- Seven syllabus areas: comprehension, interpersonal skills, logical reasoning, analytical ability, decision making, basic numeracy, data interpretation.
- Class X level for numeracy and data interpretation — no advanced mathematics.
- Negative marking applies (−⅓ per wrong answer) except some decision-making questions.
Official syllabus breakdown
The CSAT syllabus as notified by UPSC covers the following areas:
| Area | What it tests |
|---|---|
| Comprehension | Reading passages and answering inference, tone, and main-idea questions |
| Interpersonal skills including communication skills | Situational judgment on communication, teamwork, and conflict resolution |
| Logical reasoning and analytical ability | Syllogisms, series, coding-decoding, blood relations, direction sense |
| Decision making and problem solving | Scenario-based questions testing judgment; some may not carry negative marking |
| General mental ability | Pattern recognition, odd-one-out, analogy |
| Basic numeracy | Numbers and their relations, orders of magnitude — Class X level (LCM, HCF, percentages, ratios, averages, profit-loss, time-speed-distance) |
| Data interpretation | Charts (bar, pie, line), tables, and graphs requiring calculation and comparison |
All topics are at a level that does not require specialised mathematical training. Humanities-background candidates can clear CSAT with eight weeks of focused practice.
Paper format and marking
| Parameter | Detail |
|---|---|
| Questions | 80 MCQs |
| Marks | 200 (each question typically worth 2.5 marks) |
| Duration | 2 hours |
| Negative marking | −⅓ of question value for wrong answers |
| Qualifying cut-off | 33% (announced in notification) |
CSAT is held in the afternoon shift on Prelims day (typically 2:30 PM – 4:30 PM), after the morning GS Paper I session. Fatigue management matters — practice full two-shift mock days before the exam.
Section-wise preparation approach
Comprehension (highest weight): Comprehension passages account for roughly 30–40% of CSAT questions. Practice daily: read a passage, answer inference and tone questions under a 5-minute timer. Focus on eliminating wrong options rather than finding the perfect answer.
Logical reasoning: Syllogisms, seating arrangements, and series questions appear regularly. Learn standard solving techniques but do not over-invest time on complex puzzles — skip and return if a puzzle exceeds 3 minutes.
Basic numeracy: Revise Class X arithmetic — percentages, ratios, averages, profit and loss, simple and compound interest, time-speed-distance. These are speed questions: 60–90 seconds each.
Data interpretation: Practice reading bar charts, pie charts, and tables quickly. DI sets often contain 4–5 questions per chart — attempt the full set if the chart is readable within 2 minutes.
Decision making: Read question instructions carefully each year. Some decision-making questions historically do not carry negative marking for wrong answers, but this is not guaranteed — verify in the exam hall.
Weekly CSAT plan (8 weeks before Prelims)
| Day | Activity | Time |
|---|---|---|
| Monday | 2 comprehension passages | 40 min |
| Tuesday | 20 logical reasoning questions | 40 min |
| Wednesday | 15 numeracy questions (timed) | 30 min |
| Thursday | 1 data interpretation set | 30 min |
| Friday | 10 decision-making + 10 interpersonal | 30 min |
| Saturday | Mixed practice (weak areas) | 45 min |
| Sunday | Full CSAT mock (80 questions, 2 hours) | 2 hours |
This plan requires roughly 4–5 hours per week — manageable alongside GS preparation.
Exam-day strategy
- Start with comprehension — highest confidence, builds momentum.
- Move to numeracy and DI — score quickly on Class X-level questions.
- Attempt logical reasoning — skip lengthy puzzles after 3 minutes.
- Finish with decision making — read negative-marking instructions per question.
- Target 55–60 safe attempts with high accuracy rather than all 80.
If GS Paper I in the morning was draining, do not let fatigue drive careless CSAT errors. A short mental reset during the lunch break helps.
UPSC Relevance
CSAT exists because civil servants need basic analytical and communication skills beyond factual knowledge. UPSC introduced the qualifying paper to filter candidates who cannot handle administrative reasoning. For you, CSAT is a gate, not a rank-builder — clear 80+ comfortably and redirect energy to GS Paper I.
Previous Year Questions
CSAT PYQ trends:
- Comprehension: 4–6 passages with 3–5 questions each appear every year. Passages range from 200–400 words on diverse topics.
- Logical reasoning: 15–20 questions covering syllogisms, arrangements, series, and coding.
- Numeracy: 10–15 straightforward arithmetic questions — speed matters.
- Data interpretation: 2–3 sets with 4–5 questions per set.
- Decision making: 5–8 situational questions; marking rules vary — check annually.
Solving the last 10 years of CSAT papers under timed conditions is the most efficient preparation method.
Prelims Focus
Allocate 20–30% of weekly Prelims study time to CSAT, even if your background is humanities. Engineering graduates should not assume CSAT needs zero preparation — comprehension and decision-making sections test skills beyond engineering coursework.
In the final month, run at least four full CSAT mocks on Sunday afternoons simulating the two-shift exam day.
Mains Focus
CSAT skills do not directly transfer to Mains, but the reading speed and analytical clarity developed through CSAT practice improve answer-writing efficiency. Comprehension practice especially helps with Ethics case study analysis in GS IV.
Frequently asked questions
Is CSAT compulsory for all candidates?
Yes. Every candidate must appear in and qualify CSAT. There are no exemptions based on educational qualification or category.
What score should I target in CSAT?
The minimum is 33% (≈80/200). Target 100–120 to build a safe buffer. Scoring higher has no rank benefit but provides peace of mind.
Can humanities students clear CSAT?
Absolutely. The numeracy section is Class X level. With 8 weeks of focused practice, humanities-background candidates clear CSAT comfortably.
Does CSAT have the same negative marking as GS Paper I?
Yes, generally −⅓ per wrong answer. Exception: some decision-making questions may not penalise wrong answers — read the question paper instructions each year.
How much time should I spend on CSAT daily?
30–45 minutes daily during the eight weeks before Prelims is sufficient for most candidates. Increase to 60 minutes if mock scores consistently fall below 90.
Key Takeaways
- CSAT is qualifying at 33% (≈80/200) — it does not affect Prelims rank but failure eliminates you from Mains.
- Seven syllabus areas: comprehension, interpersonal skills, reasoning, decision making, mental ability, numeracy, and data interpretation.
- Comprehension carries the highest weight — practice it daily.
- Allocate 20–30% of Prelims study time to CSAT regardless of your academic background.
- Target 55–60 accurate attempts on exam day rather than attempting all 80 questions.