BharatNotes CSAT is the 200-mark aptitude paper of UPSC Prelims with 80 questions in 2 hours. The official syllabus has seven heads — comprehension, interpersonal & communication skills, logical reasoning, decision-making, general mental ability, basic numeracy (Class X), and data interpretation (Class X). In practice, three sections dominate every year: reading comprehension, basic numeracy, and logical reasoning.
The official seven-head syllabus
UPSC's CSE notification lists CSAT under seven topic heads. This list has not changed since the 2011 introduction of the paper:
- Comprehension
- Interpersonal skills including communication skills
- Logical reasoning and analytical ability
- Decision-making and problem-solving
- General mental ability
- Basic numeracy (numbers and their relations, orders of magnitude, etc.) — Class X level
- Data interpretation (charts, graphs, tables, data sufficiency) — Class X level
The paper is 200 marks, 80 questions, 2 hours, with one-third negative marking (each wrong answer deducts ~0.83 of the 2.5 marks per question). Decision-making questions historically carried no negative marking, though UPSC has stopped flagging them in recent papers — assume one-third negative on every question.
What actually appears in the paper
Here is the realistic section split based on the last four CSAT papers:
| Year | Reading Comprehension | Basic Numeracy (Maths) | Logical Reasoning | Data Interpretation / Data Sufficiency | Total |
|---|---|---|---|---|---|
| 2022 | 28 (15 passages) | ~30 | ~20 | ~2 | 80 |
| 2023 | ~30 | ~30 | 14 | ~6 | 80 |
| 2024 | 27 | 35–36 | 17–18 | ~10 (DS woven in maths/reasoning) | 80 |
| 2025 | ~29 | ~33 | ~18 | mixed | 80 |
Numbers vary slightly across coaching analyses because data interpretation and data sufficiency are often double-counted under maths or reasoning. The trend is unambiguous: maths is now the single largest content head, comprehension is steady at one-third, reasoning has thinned, and DI/DS is a quiet 8–10 question cluster every year.
What has practically disappeared
- Interpersonal skills and communication skills — once tested through small standalone questions, now folded into comprehension passages on workplace ethics or behavioural situations.
- Decision-making and problem-solving — UPSC stopped highlighting these as a separate marked-up cluster after 2014–2016.
Do not waste prep time on these heads as separate silos. They are absorbed inside the three pillars.
Bilingual delivery
Every passage and question appears in both English and Hindi. Aspirants writing in Hindi medium should know that translation occasionally creates ambiguity — when in doubt, read the English version alongside the Hindi to triangulate the intent. UPSC has acknowledged translation criticism in multiple court replies but maintains both versions are equivalent.
CSE 2026 continuity
The UPSC CSE 2026 notification (Prelims scheduled 24 May 2026) keeps the CSAT pattern identical: 200 marks, 80 questions, 33% qualifying, one-third negative, 2-hour duration from 14:30–16:30 IST. There has been no syllabus revision, no change in qualifying threshold, and no change in negative-marking rule.
Mentor's note
Don't treat the syllabus as seven equal silos. Treat it as three pillars — comprehension, maths, reasoning — with DI/DS as a connecting tissue. Mastering the three pillars is enough to comfortably cross the qualifying mark, but only if you give CSAT real practice time, not a checkbox week before Prelims.
