UPSC Prelims 2026 · Paper II
Clear CSAT with discipline, not panic.
Paper II of UPSC Prelims — qualifying at 33% — is where one-quarter of well-prepared aspirants lose the year. This page covers the exam pattern, the four-topic syllabus, a 60-day roadmap and the strategy that beats the 66-mark threshold without over-attempting.
Exam pattern
What CSAT actually is.
CSAT (Civil Services Aptitude Test) is Paper II of UPSC Prelims, introduced in 2011 and made qualifying-only since 2015. It does not contribute to your Mains shortlist rank — but failing it disqualifies your entire Prelims attempt.
| Parameter | Value | Note |
|---|---|---|
| Total questions | 80 | All objective MCQs, bilingual paper |
| Marks per question | 2.5 | Total 200 marks |
| Negative marking | –0.833 | One-third per wrong answer |
| Duration | 2 hours | 10:30 am–12:30 pm slot |
| Qualifying mark | 66 / 200 | 33% — uniform across all categories |
| Counts towards merit? | No | GS Paper I marks decide the Mains shortlist |
| Status if failed | Disqualified | GS Paper I marks become irrelevant |
Syllabus
Four topic buckets, weighted unevenly in practice.
UPSC lists seven topic heads in the official syllabus, but in practice the paper is built from four content buckets — Comprehension, Reasoning, Quant and Data Interpretation. Distribution shifts year to year; comprehension has remained the heaviest weight since 2018.
Reading comprehension
5–8 passages, each 200–400 words, followed by 1–4 questions. Themes lean toward governance, economy, environment and society — typically excerpts from The Hindu, Indian Express editorials or Economic Survey paragraphs.
- Single-passage inference (most common)
- Author's tone / central idea
- Implied conclusion / what cannot be inferred
- Author's assumption
Logical & analytical reasoning
Mid-difficulty puzzles that test ordered thinking — most can be solved with a 4×4 grid or a venn diagram. The reasoning section in CSAT tends to be easier than CAT/IBPS but more time-pressured because aspirants triage it second.
- Seating arrangement (linear, circular)
- Blood relations, direction sense
- Syllogisms and statement–conclusion
- Coding-decoding, series completion
Basic numeracy / quant
Class X arithmetic — no calculus, trigonometry beyond basic ratios, or advanced combinatorics. UPSC has been consistent: questions test fluency, not depth. Speed comes from pattern recognition, not formula recall.
- Percentages, ratios, profit & loss
- Time-speed-distance, time & work
- Averages, ages, mixtures
- Simple and compound interest
- Basic probability (drawing balls)
Data interpretation
Tables, line charts, bar charts and (rarely) pie charts. Each DI set has 2–3 questions. Reading the units and footnotes correctly is more important than computational speed — UPSC plants trap options that match wrong-unit answers.
- Table-based DI (most common)
- Comparative bar / line charts
- Mixed-format sets (table + chart)
- Caselets with percentage logic
Strategy
Five moves that get you across the 33% line.
CSAT rewards discipline more than brilliance. Most aspirants who fail CSAT do so because they over-attempt and bleed negative marks — not because the paper exceeded their ability.
- Decode the question type in 10 seconds.CSAT rewards triage. Spend the first 8 minutes scanning all 80 questions and marking each as fast / medium / leave. Attempt the fast ones first — comprehension single-passage and direct quant. Save data interpretation and dense passages for the back half.
- Target 60+ attempts, 50 correct.A 33% threshold means 66 marks out of 200. With negative marking at 1/3, aim for ~60 attempts with 50 correct — that yields 60–66 marks comfortably. Going past 65 attempts increases risk without proportionate gain.
- Comprehension is the highest-yield bucket.Roughly 25–30 of 80 questions are RC. Two close readings of every passage + always going back to the lines beats one fast read. The English passages in UPSC are deliberately calmer than CAT — speed isn't the bottleneck; accuracy is.
- Treat quant like Class X CBSE.CSAT quant rarely needs anything past Class X — ratios, percentages, time-speed-distance, basic probability, simple data tables. Drill 100 NCERT Class X problems before any "advanced" CSAT book.
- Mock as a calendar, not a checklist.Take one full 2-hour mock every 5 days from D-60 to D-15, then one every 3 days from D-15 to D-3. Always review the same day. Mocks without same-day review are worse than no mocks — they rehearse mistakes.
Roadmap
60 days, divided into three blocks.
If you have more than 60 days, the front-loaded base block widens; if you have fewer, compress evenly. The mock cadence in the final 15 days is non-negotiable.
Base block — topic-wise practice
Three RC passages a day, one quant chapter every two days, one reasoning topic per week. Build a "leave list" of question types you will skip in the exam — do not try to crack everything.
Mock block — full 2-hour papers
One full mock every 5 days at the actual 10:30–12:30 slot. Review same day. Maintain a one-page error log per mock — topic, why missed, time spent. Stop after the third mock if your attempt count is above 70.
Tightening block — high-frequency mocks
One full mock every 3 days. The goal is not to learn new content — it is to internalise the "leave list" and lock in your attempt count at 60–65. Review the error log every session.
Cool-down — no new content
Read two RC passages each morning. No mocks in the last 48 hours. Sleep schedule synchronised to a 10:30 am start. On exam day, the first 8 minutes are pure triage — not panic problem-solving.
Books
Four books cover 90% of CSAT.
Resist book accumulation. The aspirants who fail CSAT often own six books they barely opened; the ones who clear it own three they finished cover-to-cover.
Pitfalls
Common ways to lose CSAT.
Pattern recognition — these four failure modes account for the vast majority of CSAT misses among otherwise well-prepared aspirants.
The most common pattern in failed Prelims is "strong GS, careless CSAT". Plan CSAT before GS revision starts — not in the last 30 days.
Pushing past 70 attempts when you're unsure is the single largest reason for falling below 33%. Discipline yourself to leave 15–20 questions.
Easy ≠ free. Light reading habits at home cost real CSAT marks. Practice three RC passages a day from D-60 onward.
You don't need permutations and combinations at advanced levels. Class X NCERT plus 30 practice quant sets covers 90% of CSAT quant.
FAQs
What aspirants ask about CSAT.
What is the CSAT qualifying mark in UPSC Prelims?
How many questions does the CSAT paper have?
Which topic in CSAT yields the most marks for the time invested?
Is CSAT getting harder year on year?
How early should I start CSAT preparation?
Are calculators or formula sheets allowed in CSAT?
What happens if I clear GS but not CSAT?
Should I attempt all 80 questions in CSAT?
Is CSAT preparation the same for OBC / SC / ST candidates?
Can I use Hindi medium for CSAT?
Companion resources
Pair this with the rest of the Prelims stack.
Next step
Pick a mock. Take it at 10:30 sharp. Review the same day.
That loop, done eight times in the last 30 days, is the difference between a 64 and a 78 in CSAT. Start before the calendar gets tight.