If you are planning to appear for the Civil Services Examination, the first thing you should carefully understand is the UPSC prelims syllabus 2026. Many aspirants begin preparation by collecting books and resources, but the most reliable roadmap is the official UPSC syllabus 2026 itself.
The UPSC CSE syllabus 2026 for the preliminary stage includes two papers: General Studies (GS Paper 1) and CSAT (GS Paper 2). The marks obtained in GS Paper 1 determine whether you qualify for the next stage, while the CSAT paper is qualifying in nature.
On this page, we explain the IAS prelims syllabus, exam pattern, subject-wise topics, preparation strategy, and how to download the UPSC prelims syllabus PDF from the official website.
The UPSC CSE syllabus 2026 for the preliminary examination is designed to test a candidate’s understanding of general studies subjects and basic aptitude skills.
The IAS prelims syllabus broadly includes the following areas:
Along with these topics, candidates must also clear CSAT, which tests comprehension, reasoning ability and numerical aptitude.
UPSC CSE syllabus 2026Before going into the subject details, it is important to understand the UPSC prelims exam pattern 2026.
|
Paper |
Subject |
Questions |
Marks |
Duration |
|
GS Paper 1 |
General Studies |
100 |
200 |
2 Hours |
|
GS Paper 2 |
CSAT |
80 |
200 |
2 Hours |
Both papers are conducted on the same day and consist of objective multiple-choice questions (MCQs).
The UPSC GS paper 1 syllabus covers the core general studies subjects that form the foundation of the Civil Services Examination.
Marks obtained in GS Paper 1 are used to determine whether a candidate qualifies for the Mains examination.
The UPSC CSAT syllabus is designed to evaluate aptitude and analytical ability.
Candidates must score at least 33% marks (66 out of 200) to qualify for this paper. However, CSAT marks are not included in the merit calculation for selecting candidates for the Mains exam.
Understanding UPSC prelims negative marking is essential while attempting the exam.
The UPSC prelims GS paper 1 syllabus includes several subjects. Below is the IAS exam syllabus subject-wise breakdown.
Important history topics for UPSC prelims include:
Major geography UPSC prelims topics include:
Important polity topics for UPSC prelims include:
Key economy topics UPSC prelims include:
Important environment topics UPSC prelims include:
Important science topics UPSC prelims include:
Current affairs for UPSC prelims play a major role in GS Paper 1. Candidates should regularly follow:
The UPSC GS paper 2 syllabus focuses on aptitude-based questions.
Topics include:
CSAT paper syllabus topics include:
Topics include:
Though the UPSC prelims subject-wise weightage varies each year, when we look at the last 5 years' weightage, some usual trends can be drawn from it:
|
Subject |
Weightage |
|
Current Affairs |
20–25% |
|
Polity |
15–20% |
|
History |
10–15% |
|
Geography |
10–15% |
|
Environment |
10–15% |
|
Economy |
10–12% |
|
Science & Tech |
7–10% |
To download the UPSC syllabus PDF, you have to follow these steps:
You can also download the UPSC prelims syllabus PDF directly from Downloads
Unacademy DownloadsSo many beginners remain confused about the difference between the prelims and mains syllabus. Though the difference is huge and the preparation strategies for both stages vary, it can be confusing for beginners.
|
Feature |
Prelims |
Mains |
|
Question Type |
MCQs |
Descriptive |
|
Purpose |
Qualifying cut-off |
Final merit ranking |
|
Papers |
2 |
9 |
|
Focus |
Conceptual clarity and knowledge |
Analytical writing and knowledge |
You can find below some commonly recommended UPSC prelims books 2026. They include:
You can view the detailed booklist here:
UPSC Important BooksIf you are wondering how to prepare for UPSC prelims, the following approach can help:
According to the expected exam calendar:
Candidates should always verify details from the official syllabus and notification pages.
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