UPSC CSAT 2026 - Complete Exam Guide, Previous Papers & Preparation Strategy

Last Updated: March 2026

The UPSC Civil Services Aptitude Test (CSAT), officially known as General Studies Paper-II, is a qualifying examination that tests candidates on their analytical skills, decision-making abilities, and general mental aptitude. While it is qualifying in nature (candidates need only 33% to pass), it has become a major hurdle for many aspirants. This comprehensive guide covers everything you need to know about UPSC CSAT 2026.

Exam Overview

Attribute	Details
Full Form	Civil Services Aptitude Test
Conducting Body	Union Public Service Commission (UPSC)
Exam Level	National Level
Exam Frequency	Once a year
Exam Mode	Offline (Pen and Paper)
Language	English and Hindi
Exam Purpose	Qualifying paper for UPSC Prelims

Eligibility Criteria

Age Limit

General Category: 21-32 years
OBC Category: 21-35 years (3 years relaxation)
SC/ST Category: 21-37 years (5 years relaxation)
Persons with Benchmark Disability: Additional 10 years relaxation

Educational Qualification

Bachelor's degree in any discipline from a recognized university
Final year students can apply provisionally

Nationality

Indian citizen (for IAS, IPS, IFS)
Subject of Nepal/Bhutan or Tibetan refugee (for other services)

Salary and Pay Scale (After Clearing Mains & Interview)

Post	Pay Level	Basic Pay (₹)
IAS/IPS/IFS Officer	Level 10	56,100 - 1,77,500
Under Secretary	Level 11	67,700 - 2,08,700
Deputy Secretary	Level 12	78,800 - 2,09,200
Director	Level 13	1,18,500 - 2,14,100
Joint Secretary	Level 14	1,44,200 - 2,18,200

Additional Benefits:

Dearness Allowance (DA)
House Rent Allowance (HRA)
Transport Allowance (TA)
Medical benefits
Pension and gratuity
Official vehicle and accommodation (at senior levels)

Exam Pattern 2026

Section	Number of Questions	Marks	Time
Comprehension	30	80	-
Logical Reasoning & Analytical Ability	22	55	-
Decision Making & Problem Solving	8	20	-
General Mental Ability	15	37.5	-
Basic Numeracy	15	37.5	-
Data Interpretation	10	30	-
Total	80	200	2 Hours

Key Points:

Qualifying Marks: 66 marks (33% of 200)
Negative Marking: 0.83 marks deducted for each wrong answer (1/3rd of 2.5)
Decision Making questions have NO negative marking
Questions are of Objective Type (MCQs)

Syllabus Overview

1. Comprehension

Passage-based questions testing understanding and inference
English language comprehension skills (Class X level)

2. Interpersonal Skills & Communication

Communication effectiveness
Interpersonal effectiveness

3. Logical Reasoning & Analytical Ability

Syllogisms
Statement and Arguments
Statement and Assumptions
Statement and Conclusions
Statement and Courses of Action
Cause and Effect
Coding-Decoding
Blood Relations
Direction Sense
Ranking and Ordering

4. Decision Making & Problem Solving

Real-life scenario-based questions
Administrative decision-making situations
No negative marking for these questions

5. General Mental Ability

Series completion (Number, Letter, Figure)
Classification
Analogy
Venn Diagrams
Mathematical operations
Calendar and Clock problems

6. Basic Numeracy

Number Systems
HCF and LCM
Percentage
Profit and Loss
Simple and Compound Interest
Ratio and Proportion
Averages
Time, Speed and Distance
Time and Work
Permutation and Combination
Probability
Mensuration

7. Data Interpretation

Tables
Bar Graphs
Line Graphs
Pie Charts
Mixed Graphs

Quantitative Aptitude Questions with Solutions

Question 1: Number Series

Find the missing number: 2, 6, 12, 20, 30, ?

Solution: The pattern is: n(n+1) where n starts from 1

1 × 2 = 2
2 × 3 = 6
3 × 4 = 12
4 × 5 = 20
5 × 6 = 30
6 × 7 = 42

Shortcut: Differences are 4, 6, 8, 10, so next difference = 12 → 30 + 12 = 42

Question 2: Percentage

If A's salary is 20% less than B's salary, by how much percentage is B's salary more than A's?

Solution: Let B's salary = 100 Then A's salary = 80

Percentage increase needed = (100-80)/80 × 100 = 20/80 × 100 = 25%

Shortcut Formula: If A is x% less than B, then B is [x/(100-x)] × 100% more than A = [20/(100-20)] × 100 = 20/80 × 100 = 25%

Question 3: Profit and Loss

A shopkeeper sells an article at a profit of 25%. If he had bought it at 10% less and sold it for ₹7 less, he would have gained 30%. Find the cost price.

Solution: Let CP = ₹100 Original SP = ₹125 (25% profit)

New CP = ₹90 (10% less) New SP for 30% profit = 90 × 1.30 = ₹117

Difference in SP = 125 - 117 = ₹8 When difference is ₹8, CP = ₹100 When difference is ₹7, CP = (100/8) × 7 = ₹87.50

Question 4: Time and Work

A can complete a work in 12 days and B can complete the same work in 18 days. They work together for 4 days, then A leaves. How many more days will B take to complete the work?

Solution: A's 1 day work = 1/12 B's 1 day work = 1/18

(A+B)'s 1 day work = 1/12 + 1/18 = (3+2)/36 = 5/36

Work done in 4 days = 4 × 5/36 = 20/36 = 5/9

Remaining work = 1 - 5/9 = 4/9

B will complete 4/9 work in: (4/9) × 18 = 8 days

Question 5: Ratio and Proportion

The ratio of ages of A and B is 4:5. After 6 years, the ratio becomes 6:7. What is the present age of A?

Solution: Let present ages be 4x and 5x

After 6 years: (4x+6)/(5x+6) = 6/7 Cross multiply: 7(4x+6) = 6(5x+6) 28x + 42 = 30x + 36 2x = 6 x = 3

A's present age = 4 × 3 = 12 years

Question 6: Simple Interest

A sum amounts to ₹9800 in 5 years and ₹12005 in 8 years at simple interest. Find the principal.

Solution: SI for 3 years (8-5) = 12005 - 9800 = ₹2205 SI for 1 year = 2205/3 = ₹735 SI for 5 years = 735 × 5 = ₹3675

Principal = 9800 - 3675 = ₹6125

Question 7: Compound Interest

The difference between compound interest and simple interest on ₹5000 for 2 years at 8% per annum is:

Solution: Difference = P × R²/10000 = 5000 × 8 × 8/10000 = 5000 × 64/10000 = ₹32

Shortcut: Difference = P(R/100)²

Question 8: Speed and Distance

A train 150m long crosses a platform 250m long in 20 seconds. What is the speed of the train?

Solution: Total distance = 150 + 250 = 400m Time = 20 seconds Speed = 400/20 = 20 m/s

Convert to km/h: 20 × 18/5 = 72 km/h

Question 9: Probability

A bag contains 4 red, 5 green, and 3 blue balls. Two balls are drawn at random. What is the probability that both are red?

Solution: Total balls = 12 Probability = (4/12) × (3/11) = 12/132 = 1/11

Question 10: Data Interpretation

Study the table and answer:

Year	Sales (in ₹ crores)
2020	120
2021	150
2022	180
2023	135
2024	195

Q: What is the percentage increase in sales from 2020 to 2024?

Solution: Increase = 195 - 120 = 75 Percentage increase = (75/120) × 100 = 62.5%

Question 11: Permutation

In how many ways can the letters of the word 'LEADING' be arranged so that the vowels always come together?

Solution: Word: L-E-A-D-I-N-G Vowels: E, A, I (3 vowels) Consonants: L, D, N, G (4 consonants)

Treat vowels as one unit: (EAI) + L + D + N + G = 5 units These can be arranged in 5! ways Vowels within can be arranged in 3! ways

Total arrangements = 5! × 3! = 120 × 6 = 720

Question 12: Average

The average of 11 numbers is 50. If the average of the first 6 numbers is 48 and the average of the last 6 numbers is 52, find the 6th number.

Solution: Sum of 11 numbers = 11 × 50 = 550 Sum of first 6 = 6 × 48 = 288 Sum of last 6 = 6 × 52 = 312

6th number = (288 + 312) - 550 = 600 - 550 = 50

Question 13: Mensuration

The diagonal of a square is 10√2 cm. What is its area?

Solution: For a square: Diagonal = Side × √2 Side = 10√2/√2 = 10 cm Area = 10 × 10 = 100 cm²

Shortcut: Area = Diagonal²/2 = (10√2)²/2 = 200/2 = 100 cm²

Question 14: HCF and LCM

The HCF of two numbers is 12 and their LCM is 360. If one number is 72, find the other.

Solution: Product of two numbers = HCF × LCM 72 × Other number = 12 × 360 Other number = (12 × 360)/72 = 60

Question 15: Allegation

In what ratio must water be mixed with milk costing ₹48 per litre to get a mixture worth ₹36 per litre?

Solution: Using allegation rule: Water (₹0) _______ Milk (₹48) \ / ₹36 /
(48-36)=12 (36-0)=36

Ratio = 12:36 = 1:3

Reasoning Questions with Solutions

Question 1: Syllogism

Statements:

All roses are flowers
Some flowers are red
No red is blue

Conclusions: I. Some roses are red II. No flower is blue

Solution: Only Conclusion I follows (Some roses which are flowers can be red) Conclusion II does not follow as only "some flowers" are red, not all.

Question 2: Coding-Decoding

If COMPUTER is coded as RFUVQNPC, how will MEDICINE be coded?

Solution: Pattern: Each letter is shifted by +1, +2, +3... alternatively C(+1)→R, O(+2)→F, M(+3)→U, P(+4)→V, U(-1)→Q, T(-2)→N, E(-3)→P, R(-4)→C

Wait, let's check reverse: R-F-U-V-Q-N-P-C Actually it's: First 4 letters +1,+2,+3,+4 and last 4 -1,-2,-3,-4

MEDICINE → F(O), N(E), F(F), O(O), J(H), G(G), F(F), J(N) Correct code: FOJHGFFJ or applying same: EOJDJEFM

Question 3: Blood Relations

Pointing to a photograph, a man said, "She is the daughter of my grandfather's only son." How is the man related to the girl?

Solution: Grandfather's only son = Man's father Daughter of man's father = Man's sister

Question 4: Direction Sense

A man walks 5 km North, turns right and walks 3 km, turns right again and walks 5 km. How far is he from the starting point?

Solution: Visualize:

Start at origin
Walk 5 km North → (0, 5)
Turn right (East), walk 3 km → (3, 5)
Turn right (South), walk 5 km → (3, 0)

Distance from start = 3 km

Question 5: Analogy

Doctor : Hospital :: Teacher : ?

Solution: Doctor works in Hospital Teacher works in School

Question 6: Ranking

In a row of 40 students, Amit is 15th from the left. What is his position from the right?

Solution: Position from right = Total - Position from left + 1 = 40 - 15 + 1 = 26th

Question 7: Statement-Assumption

Statement: "Use XYZ brand soap for fairer skin." - An advertisement

Assumptions: I. People want fairer skin II. Other soaps don't make skin fair

Solution: Only Assumption I is implicit. The ad assumes people desire fairer skin. Assumption II is not implicit as ads don't usually claim superiority directly.

Question 8: Venn Diagram

Which diagram best represents the relationship between: India, Delhi, Asia?

Solution:

Asia is the largest (continent)
India is within Asia (country)
Delhi is within India (capital)

This is a concentric circle relationship: Delhi ⊂ India ⊂ Asia

Question 9: Calendar

What was the day of the week on 15th August 1947?

Solution: Using Zeller's congruence or known reference: 1st January 1947 was Wednesday Count days: 31+28+31+30+31+30+31+15 = 227 days 227 mod 7 = 3 (remainder) Wednesday + 3 = Friday

Question 10: Course of Action

Statement: The school dropout rate in rural areas has increased significantly.

Courses of Action: I. Government should open more schools in rural areas II. Awareness campaigns about education should be conducted

Solution: Both courses of action follow logically. More schools address accessibility, awareness addresses mindset.

General Knowledge Questions

Question	Answer
1. Who was the first President of India?	Dr. Rajendra Prasad
2. Which is the longest river in India?	Ganga
3. Who wrote the Indian National Anthem?	Rabindranath Tagore
4. What is the currency of Japan?	Yen
5. Which planet is known as the Red Planet?	Mars
6. Who is known as the Father of the Indian Constitution?	Dr. B.R. Ambedkar
7. Which is the largest state in India by area?	Rajasthan
8. In which year did India gain independence?	1947
9. What is the chemical formula of water?	H₂O
10. Who invented the telephone?	Alexander Graham Bell

English Questions with Solutions

Question 1: Spot the Error

Identify the error in: "The number of students are increasing day by day."

Question 2: Synonyms

Choose the synonym of BENEVOLENT: a) Malevolent b) Kind c) Cruel d) Harsh

Question 3: Antonyms

Choose the antonym of EPHEMERAL: a) Temporary b) Transient c) Eternal d) Fleeting

Question 4: One Word Substitution

A person who knows many languages: a) Polyglot b) Philanthropist c) Misanthrope d) Bibliophile

Question 5: Idioms

What does "To burn the midnight oil" mean? a) To waste time b) To study/work late at night c) To start a fire d) To be angry

Previous Year Cutoff Marks

Year	General	OBC	SC	ST
2024	75*	74*	73*	70*
2023	75*	74*	73*	70*
2022	66 (33%)	66 (33%)	66 (33%)	66 (33%)
2021	66 (33%)	66 (33%)	66 (33%)	66 (33%)
2020	66 (33%)	66 (33%)	66 (33%)	66 (33%)

*GS Paper-I cutoffs shown for reference. CSAT is qualifying at 33% (66 marks).

3-Month Preparation Strategy

Month 1: Foundation Building

Week 1-2: Comprehension & Communication

Read English newspapers daily (The Hindu/Indian Express)
Practice 2-3 comprehension passages daily
Focus on speed reading

Week 3-4: Logical Reasoning

Study syllogisms, statement-assumptions, coding-decoding
Solve 20-30 reasoning questions daily
Learn Venn diagram techniques

Month 2: Quantitative Aptitude

Week 1-2: Basic Numeracy

Number systems, HCF-LCM, Percentage, Profit-Loss
Ratio-Proportion, Averages
Practice 30-40 questions daily from each topic

Week 3-4: Advanced Topics

Time-Work, Time-Speed-Distance
Probability, Permutation-Combination
Mensuration basics

Month 3: Data Interpretation & Mock Tests

Week 1-2: Data Interpretation

Tables, Bar graphs, Pie charts, Line graphs
Practice DI sets daily
Focus on calculation speed

Week 3-4: Revision & Mocks

Solve previous year papers (2011-2025)
Take 2-3 full-length mocks weekly
Analyze weak areas and revise

Daily Schedule (2-3 hours)

Morning: Newspaper reading (30 min)
Afternoon: Topic-wise practice (1 hour)
Evening: Mock test/Previous paper (1 hour)

Best Books and Resources

Recommended Books

Subject	Book	Author/Publisher
Quantitative Aptitude	Quantitative Aptitude for Competitive Examinations	R.S. Aggarwal
Quantitative Aptitude	Fast Track Objective Arithmetic	Rajesh Verma
Logical Reasoning	A Modern Approach to Verbal & Non-Verbal Reasoning	R.S. Aggarwal
Data Interpretation	Data Interpretation	Arun Sharma
Comprehension	Reading Comprehension	Ajay Singh

Online Resources

Websites: UPSC official site (upsc.gov.in), Clear IAS, Insights on India
YouTube Channels: Unacademy UPSC, Study IQ Education, Drishti IAS
Apps: Testbook, Gradeup, Unacademy Learning App
Previous Papers: Available on UPSC website (2011-2025)

Frequently Asked Questions (FAQs)

Q1: Is CSAT qualifying or counted for merit?

A: CSAT is a qualifying paper. You need 66 marks (33%) to pass. Marks are not counted for Prelims cutoff ranking.

Q2: Can I clear CSAT without mathematics background?

A: Yes! The level is Class X basic numeracy. With consistent practice, anyone can clear it.

Q3: How many questions should I attempt to be safe?

A: Aim for 28-30 correct answers (70-75 marks) to be comfortably above the cutoff.

Q4: Is there negative marking in CSAT?

A: Yes, 0.83 marks (1/3rd of 2.5) deducted for each wrong answer. Decision-making questions have no negative marking.

Q5: Which section should I focus on more?

A: Comprehension (40% weightage) is the most important, followed by Reasoning and Basic Numeracy.

Final Tips for Success

Don't take CSAT lightly - Many qualified candidates fail due to overconfidence
Practice calculation speed - Use Vedic math tricks
Read editorials daily - Improves comprehension speed
Attempt decision-making questions - They're scoring with no negative marks
Time management - Don't spend more than 2 minutes per question
Mock tests are crucial - Simulate exam conditions
Accuracy over attempts - 27 correct is better than 35 with 10 wrong

Last Updated: March 2026

Best of luck with your UPSC CSAT 2026 preparation! 🇮🇳