New: all of today's current affairs in 10 minutes, free Start reading FLAT 15% OFF ON ALL COURSES Know More Admissions open Starts 21 Oct: Live Mini Mains Test Series for UPSC Mains 2027 Starts 25 Oct: Live Full Mains Test Series for UPSC Mains 2027 Starts 11 Dec: Live Essay Module + Essay Test Series for UPSC Mains 2027 Live Essay for UPSC Mains 2027
Decode Civils

About UPSC · Syllabus

GS Paper 3 Syllabus: Economy, Environment, Science, Security

The official GS Paper III syllabus from the CSE 2026 notice, point by point, with what the paper covers in plain words, where it sits in the mains and how to prepare from it.

Updated 5 min read 2 official sources

GS Paper III at a glance

Paper in the mains
Paper IV
Marks
250counted for your final rank
Time
3 hours
Syllabus points
20as printed in the notice

From the CSE 2026 notice.

On this page5 sections
  1. The syllabus, as UPSC prints it
  2. What the paper covers
  3. Where GS III sits in the mains
  4. Links with other papers
  5. How to prepare from the syllabus

GS Paper III is one of the seven UPSC Mains papers that count towards your final rank. In UPSC's numbering it is Paper IV of the mains, titled General Studies-III: Technology, Economic Development, Bio diversity, Environment, Security and Disaster Management. It carries 250 marks and you get three hours to write it.

The notice prints its syllabus as 20 points. Here they are in UPSC's words, then in plain words, followed by where the paper sits in the mains and how to prepare from it.

The syllabus, as UPSC prints it

Paper IV: General Studies-III · 250 marks

General Studies-III: Technology, Economic Development, Bio diversity, Environment, Security and Disaster Management

  • Indian Economy and issues relating to planning, mobilization, of resources, growth, development and employment.
  • Inclusive growth and issues arising from it.
  • Government Budgeting.
  • Major crops-cropping patterns in various parts of the country, - different types of irrigation and irrigation systems storage, transport and marketing of agricultural produce and issues and related constraints; e-technology in the aid of farmers.
  • Issues related to direct and indirect farm subsidies and minimum support prices; Public Distribution System- objectives, functioning, limitations, revamping; issues of buffer stocks and food security; Technology missions; economics of animal-rearing.
  • Food processing and related industries in India- scope’ and significance, location, upstream and downstream requirements, supply chain management.
  • Land reforms in India.
  • Effects of liberalization on the economy, changes in industrial policy and their effects on industrial growth.
  • Infrastructure: Energy, Ports, Roads, Airports, Railways etc.
  • Investment models.
  • Science and Technology- developments and their applications and effects in everyday life.
  • Achievements of Indians in science & technology; indigenization of technology and developing new technology.
  • Awareness in the fields of IT, Space, Computers, robotics, nano-technology, bio-technology and issues relating to intellectual property rights.
  • Conservation, environmental pollution and degradation, environmental impact assessment.
  • Disaster and disaster management.
  • Linkages between development and spread of extremism.
  • Role of external state and non-state actors in creating challenges to internal security.
  • Challenges to internal security through communication networks, role of media and social networking sites in internal security challenges, basics of cyber security; money-laundering and its prevention.
  • Security challenges and their management in border areas - linkages of organized crime with terrorism.
  • Various Security forces and agencies and their mandate.

Source: UPSC: Civil Services Examination 2026 notice, Appendix I Section III (Syllabi). The words are UPSC's. We reflowed the PDF's lines and marked its headings; for the exact layout, see the notice.

What the paper covers

The 20 points group into five parts.

The economy (6 points)

The Indian economy and planning, how resources are mobilised, growth, development and employment; inclusive growth and the issues it raises; government budgeting; the effects of liberalisation and of changes in industrial policy on industrial growth; infrastructure such as energy, ports, roads, airports and railways; and investment models.

Agriculture and food (4 points)

Cropping patterns across the country, irrigation, and the storage, transport and marketing of farm produce, with technology that helps farmers; farm subsidies, minimum support prices, the Public Distribution System, buffer stocks and food security, technology missions and the economics of rearing animals; the food processing industry and its supply chain; and land reforms.

Science and technology (3 points)

Developments in science and technology and their effects on everyday life; the achievements of Indians in the field, and building technology at home; and awareness of IT, space, computers, robotics, nanotechnology and biotechnology, with issues of intellectual property rights.

Environment and disasters (2 points)

Conservation, pollution and environmental degradation, and environmental impact assessment; and disasters and disaster management.

Security (5 points)

How development and the spread of extremism are linked; the role of external state and non-state actors in internal security; communication networks, the media and social networking sites, the basics of cyber security, and money laundering; security in border areas and the links between organised crime and terrorism; and the security forces and agencies, with their mandates.

Where GS III sits in the mains

GS III is the third of four General Studies papers, highlighted below. With the Essay and your two optional papers, they make up the 1,750 marks that decide your written rank.

UPSC Mains: nine papers, seven that count

Marks as given in the CSE 2026 notice

UPSC Civil Services Mains papers and marks
PaperMarksCounts for merit
Paper A: Indian language (qualifying) 300 No, qualifying
Paper B: English (qualifying) 300 No, qualifying
Essay 250 Yes
General Studies I 250 Yes
General Studies II 250 Yes
General Studies III 250 Yes
General Studies IV 250 Yes
Optional paper 1 250 Yes
Optional paper 2 250 Yes
Written total that counts1,750
Personality test (interview)275Yes
Final total2,025

Each written paper is three hours long and essay-type. The language papers need 25% each; below that, UPSC does not count the other papers.

Three prelims lines lead most directly into this paper: economic and social development, general issues on environment, biodiversity and climate change, and general science. The prelims tests them as multiple-choice questions; GS III asks you to explain them and their effects in writing. See the prelims syllabus and the subject guides for the economy, environment, science and technology and internal security.

How to prepare from the syllabus

  • Read the Budget as a syllabus document. Government budgeting is a point of its own. Reading each year's Union Budget and Economic Survey gives you the official figures and terms for the economy points.
  • Treat agriculture as a chain. The points run from the crop and its irrigation to storage, transport, marketing, prices, subsidies, food security and processing. Make notes that follow produce from field to plate.
  • Tie every technology to its use. The syllabus asks for applications and effects in everyday life, so for each development note what it changes for people, not just how it works.
  • Learn the security institutions. The last point asks for the security forces and agencies and their mandates. Keep a table of each force, the ministry it reports to and what it does.
  • Learn disaster management through cases. Pick recent disasters in India and study how they were managed, so you can write about the subject with examples.
  • Write against the clock. You get three hours for the whole paper, so practise full papers in that time. Mains answer writing

Frequently asked questions

How many marks is GS Paper 3?

250 marks, and they count towards your final rank. The paper is three hours long and essay-type, like every other mains paper.

Is agriculture part of GS Paper 3?

Yes, in four points: cropping patterns, irrigation, and the storage, transport and marketing of produce; farm subsidies, minimum support prices, the Public Distribution System, buffer stocks and food security; food processing; and land reforms.

Does GS Paper 3 include internal security?

Yes, in five points: development and the spread of extremism; external state and non-state actors; communication networks, social media, cyber security and money laundering; border areas and the links between organised crime and terrorism; and the security forces and agencies and their mandates.

Is disaster management in GS Paper 3?

Yes. Disaster and disaster management is a point of its own, and disaster management is in the paper's title.

Is there a minimum mark for GS Paper 3?

For the mains cut-off, UPSC's cut-off notices require at least 10% in each of the seven papers that count, and GS III is one of them.

Sources

Every figure on this page comes from these official documents. If you spot a difference, the official document is right; tell us and we'll fix the page.

  1. UPSC: Civil Services Examination 2026 notice (No. 05/2026-CSE), Appendix I
  2. UPSC: cut-off marks, Civil Services Examination 2025 (10% rule in each paper that counts)

Found this useful? Share it with your study group.

From Decode Civils

Courses for this topic

View all courses