UPSC Prelims Syllabus 2027- Complete GS Paper 1 and CSAT Syllabus

The UPSC Prelims is the first stage of the UPSC Civil Services Examination. UPSC Prelims exam a candidate’s basic knowledge of different subjects and awareness of current events. The candidate must clear Prelims to appear for the Mains examination. The UPSC Prelims 2027 consists of two objective-type, multiple-choice papers General Studies Paper I and CSAT (Paper II) scheduled for May 23, 2027. The UPSC Prelims exam has two papers: -

General Studies Paper 1General Studies Paper 2, also called CSAT
UPSC Prelims Syllabus 2027 for General Studies and CSAT

UPSC Prelims Exam Pattern

There are two papers in the UPSC Prelims exam. Both papers have multiple-choice questions. General Studies Paper 1 decides the Prelims cut-off. CSAT is only a qualifying paper.

Paper 1200 marks
CSAT200 marks
Time2 hours for each paper
Question typeBoth papers have objective-type questions.
CSAT requirementCSAT is qualifying; you need 33%
MarkingThere is negative marking for wrong answers.
Paper I

General Studies Paper 1

General Studies Paper 1 has questions from history, geography, polity, economy, environment, science, and current affairs. It is the main paper of the Prelims. The paper checks your basic knowledge as well as your understanding of important topics.

Current Affairs

This section covers important events in India and the world. Questions can be asked about recent government decisions, schemes, reports, and important events. Important Current Affairs topics are:

  • National news
  • International news
  • Government schemes
  • Important reports
  • Awards
  • Important appointments
  • International organisations
  • Important events

History of India

This section covers the history of India. It includes ancient, medieval, and modern history. The freedom struggle is an important part of this section. Important History of India topics are: -

  • Ancient India
  • Medieval India
  • Modern India
  • British rule
  • Social and religious reform movements
  • Indian freedom struggle
  • Important movements
  • Important leaders

Indian and World Geography

This section covers the geography of India and the world. It includes land, rivers, mountains, climate, resources, and population. It helps you to understand the Earth. Indian and World Geography Important topics are: -

  • Physical geography
  • Indian geography
  • World geography
  • Rivers and mountains
  • Climate
  • Monsoon
  • Natural resources
  • Agriculture
  • Industries
  • Population
  • Important places

Indian Polity and Governance

This section explains how the Indian government works. It mainly covers the Constitution, Parliament of India, President of India, Prime Minister, courts, and elections. Important Indian Polity and Governance topics are:-

  • Indian Constitution
  • Fundamental Rights
  • Fundamental Duties
  • Parliament
  • President of India
  • Prime Minister
  • Supreme Court
  • High Courts
  • State government
  • Local government
  • Elections
  • Constitutional bodies
  • Government schemes and policies

Economy and Social Development

This section covers the basic ideas of the Indian economy. It also includes topics related to poverty, jobs, banking, and government schemes.

Important topics are:

  • Indian economy
  • Economic growth
  • Inflation
  • Employment
  • Poverty
  • Banking
  • Budget
  • Taxation
  • Government schemes
  • Social development
  • Sustainable development

Environment and Biodiversity

This section covers nature, animals, plants, and environmental problems. Climate change and pollution are also important topics.

Important topics are:

  • Ecosystem
  • Biodiversity
  • Wildlife
  • National parks
  • Wildlife sanctuaries
  • Pollution
  • Climate change
  • Global warming
  • Conservation
  • Renewable energy
  • Environmental agreements

General Science

This section covers basic science and new developments in science and technology. Questions can be related to things we see in daily life. Important topics are:

  • Physics
  • Chemistry
  • Biology
  • Human health
  • Biotechnology
  • Space
  • Information technology
  • New technology
  • Recent science developments
Paper II

CSAT- General Studies Paper 2

CSAT stands for Civil Services Aptitude Test and is the second paper of the UPSC Prelims examination. The CSAT syllabus includes comprehension, communication and interpersonal skills, logical reasoning, analytical ability, decision-making, problem-solving, general mental ability, basic numeracy, and data interpretation. It tests candidates' basic reading, mathematics, reasoning, and aptitude skills. CSAT is a qualifying paper, meaning candidates must score at least 33% marks to clear it.

Comprehension

Comprehension means understanding what you read. You will get a passage and questions based on it. You need to read the passage carefully and choose the correct answer.

Logical Reasoning

This section tests your thinking and reasoning skills. You may get questions based on statements, relationships, patterns, and puzzles.

Decision-Making and Problem-Solving

These questions give you a situation or problem. You have to understand the situation and have to choose the most suitable answer.

General Mental Ability

This section checks your basic thinking and calculation skills. Questions can be based on numbers, patterns, and simple logic.

Basic Numeracy

This section covers basic maths. The level is generally up to Class 10. Important topics include:

  • Numbers
  • Percentage
  • Ratio
  • Average
  • Profit and loss
  • Simple interest
  • Compound interest
  • Time and work
  • Speed and distance
  • Basic algebra

Data Interpretation

This section tests your ability to understand numbers and data. Questions can be based on tables, graphs, and charts.

Tips for UPSC Prelims Preparation

A good study plan can make Prelims preparation easier. Focus on the syllabus and revise what you study. Regular practice is also important.

  • Follow the syllabus: Keep the UPSC syllabus with you and study topics according to it.
  • Solve previous year papers: They help you understand the type and level of questions asked in the exam.
  • Read current affairs: Follow important national and international events regularly.
  • Revise regularly: Revise important topics instead of studying new topics all the time.
  • Practise mock tests: Mock tests help you improve your speed, accuracy, and time management.

Frequently Asked Questions (FAQ)

1. What is the UPSC Prelims Syllabus 2027?

The UPSC Prelims syllabus consists of two objective-type papers: General Studies (GS) Paper 1 and General Studies Paper 2 (CSAT). GS Paper 1 covers subjects such as History, Geography, Polity, Economy, Environment, Science and Technology, and Current Affairs.

2. How many papers are there in the UPSC Prelims Exam?

The UPSC Civil Services Preliminary Examination consists of two papers: -

  • GS Paper 1
  • GS Paper 2 (CSAT)

Both papers are conducted on the same day.

3. Is CSAT compulsory for UPSC Prelims 2027?

Yes, CSAT is compulsory for all candidates appearing in the UPSC Prelims. However, it is a qualifying paper, and candidates must score at least 33% marks to qualify.

4. What subjects are Covered in UPSC Prelims GS Paper 1?

GS Paper 1 broadly covers Current Affairs, Indian History, Indian and World Geography, Indian Polity and Governance, Economic and Social Development, Environment and Ecology, Biodiversity, Climate Change, and General Science.

5. What is included in the UPSC CSAT syllabus?

The CSAT Syllabus includes comprehension, communication skills, logical reasoning, analytical ability, decision-making, problem-solving, general mental ability, basic numeracy, and data interpretation.

6. How many marks are there in UPSC Prelims Paper 1 and CSAT?

Both GS Paper 1 and CSAT carry 200 marks each. However, only GS Paper 1 marks are considered for determining the Prelims cutoff, provided the candidate qualifies in CSAT.

7. What is the duration of the UPSC Prelims Exam?

Each UPSC Prelims paper is conducted for 2 hours. Candidates get separate time slots for GS Paper 1 and CSAT.

8. Is there negative marking in the UPSC Prelims Exam?

Yes, negative marking applies to incorrect answers in the UPSC Prelims. Generally, one-third of the marks assigned to a question are deducted for every wrong answer.

9. Are UPSC Prelims marks included in the final merit list?

No, the marks obtained in the UPSC Preliminary Examination are not included in the final merit list. Prelims is a screening stage for selection to the UPSC Mains Examination.

10. How should I prepare according to the UPSC Prelims Syllabus 2027?

Candidates should first understand the complete syllabus and then build a strong foundation in static subjects, current affairs, revision, previous-year question papers, and regular mock-test practice. Equal attention should also be given to CSAT, as it is mandatory to qualify.