IAS Exam Syllabus 2021- Detail Information about Prelims & Mains

IAS Syllabus & Eligibility

UPSC IAS Syllabus 2021: Union Public Service Commission (UPSC) discharges UPSC IAS  Syllabus alongside the UPSC Notification PDF. UPSC IAS is one of the hardest and most pined for tests in India led by UPSC. Consistently lakhs of applicants show up for the UPSC Exam to make their carer in the field of Civil Services. The main component for IAS arrangement is an unmistakable comprehension of the UPSC IAS Syllabus 2021 for successful readiness.

IAS Exam preparation is very difficult for the candidate. From the beginning, the candidate needs to be serious & take the right knowledge about UPSC Exam. The initial move towards the beginning arrangement is to get to know the UPSC IAS Syllabus 2021 and UPSC IAS Exam Pattern for Prelims and Mains.

To understand the UPSC Exam, one necessity to understand the IAS Syllabus. This helps to save your time from wasteful efforts like reading on this topic which is unnecessary and keeps one carefully adjusted to the assumptions for the UPSC from the very first moment.

In light of this, Aspirants can set up a successful examination plan and work in a like manner. In this article, we will give Detail information about UPSC Syllabus IAS 2021.

How many types of IAS exams conducted?

IAS Exam is conducted in three different Phase which given Below:

Phase 1: Preliminary Exam (Objective Type)

Phase 2: Mains Exam (Descriptive Type)

Phase 3: Personal Interview/Personality Test

  • Check IAS Prelims Exam Syllabus

Aspirants must attempt both IAS prelims exam papers to qualify for the main exam. Each paper is 200 marks and attempts all questions in 2 hours duration.

General Studies – 100 questions attempt in 2 hour

CSAT – 80 question attempt in 2 hours

Subjects PaperMarksTime
1. General Studies (GS)200 marks120 minute
2. CSAT200 marks120 minute


Important Points-

  • Negative Marking – Both papers have negative markings for wrong answers set apart to the tune of 1/3rd of the complete marks allotted to that question.
  • General Studies (Generally led between 9:30 AM and 11:30 AM)
  • Common Services Aptitude Test (CSAT) (Generally directed between 2:30 PM and 04:30 PM)
  • The ‘Decision Making’ based marks are for the most part excluded from negative imprints.
  • IAS Prelims is only a screening test. If a candidate clears this exam candidate can attempt the next IAS mains exam.
  • The marks acquired in the Prelims exam won’t be added up while showing up on the last rank list.
  • This UPSC Prelims prospectus for CSAT plans to survey the inclination of the competitor in settling ‘Thinking and Analytical’ questions, aside from ‘Understanding Comprehension and the sometimes asked ‘Dynamic’ questions.
  • UPSC Mains Exam Syllabus

The Mains assessment establishes the second period of the Civil Services Examination. Solely after effectively qualifying in the Prelims Exam would the aspirants be permitted to compose the IAS Mains.

The total Exam syllabus is given in the below table:

PapersSubjects in Mains examMarks
EssayEssay250 marks
General Studies 1(Indian Heritage & Culture, History & Geography of the World & Society)250 marks
General Studies 2(Governance, Constitution, Polity, Social Justice & International Relations)250 marks
General Studies 3(Technology, Economic Development, Biodiversity, Security & Disaster Management)250 marks
General Studies 4(Ethics, Integrity & Aptitude)250 marks
Optional Subject – Paper 1Given below250 marks
Optional Subject – Paper 2Given below250 marks
Total1750 marks

Important Points

  • The UPSC Mains test comprises 9 papers, out of which two are qualifying papers of 300 denotes each.
  • The two passing papers are:
  • Any Indian Language Paper
  • English Language Paper
  • The papers on Essay, General Studies, and Optional Subject of just such applicants who achieve 25% imprints in both the language papers as a base passing norm in these passing papers, will be taken comprehension of, for assessment.
  • IAS Interview/UPSC Personality Test 

Aspirants who qualify for the UPSC Mains Exam will be required the ‘Character Test/Interview’. These Aspirants will be met by a board appointed.

The target of the meeting is to find a suitable candidate for a career in civil services by a UPSC Board.

The meeting is to a greater extent a purposive discussion expected to investigate the mental characteristics and insightful capacity of the competitor.

The Interview test will be 275 marks and the absolute mark for the written exam is 1750. This summarizes to a Grand Total of 2025 Marks, in light of which the final merit list.

What are the optional Subjects in UPSC Main Exam?

Candidates need to pick one optional subject for the mains test. The discretionary subject has two papers and each paper represents 250 marks. Here, we provide a list of the optional subject which given below.

Each paper for the UPSC mains test will be in three hours span. The Marks papers, other than the writing of language papers will be set in Hindi and English as it were. Both are optional paper plays important role in the mains exam.


Animal Husbandry and Veterinary Science




Civil Engineering

Commerce and Accountancy


Electrical Engineering







Mechanical Engineering

Medical Science



Political Science and International Relations


Public Administration





You can choose language, according to your choice:

Wannabes can pick a writing subject as their discretionary for UPSC Mains regardless of whether they had not accepted that language as their graduation subject. There will be two papers. Each paper is 250 marks. The dialects endorsed here are from the Eighth Schedule of the Indian Constitution.
























Frequently Asked Questions

Q. How many languages in the literature subjects Exam?

A. The Total number of literature subjects is 23  in the UPSC syllabus. The candidates can choose for any literature subject. The list of the subjects is given above for perusal.

Q. How much time you will cover IAS syllabus?

A. Minimum time to covered IAS Syllabus is 1.5 to 2 years with a consistent effort. Toppers and mentors suggest covering the IAS main syllabus first.

Q. What are the sources to cover IAS Syllabus?

A. Candidate can cover his/her IAS Syllabus from the standard textbooks, Previous year question papers, newspapers for current affairs. Starting with the NCERT books.

Q. Is UPSC Syllabus covers everything?

A. The IAS prospectus covers all that which is pertinent to India and Indian residents. However, on account of the Science and Technology region, there are no restrictions for the IAS prospectus. Earlier year’s inquiry papers can enormously help in finding out the limits of the IAS prospectus.

Q. What is the role of current affairs in the IAS syllabus?

A. Current Affairs is a very important factor in IAS Preparation. All the topics in the IAS Syllabus need to be linked with the current events national and International happenings.

Q. Where anyone can get details of IAS syllabus topics?

A. The IAS prelims schedule isn’t all around characterized in the UPSC warning. Be that as it may, the IAS principle test schedule is very much characterized and clarified in the actual warning. The up-and-comers need to peruse, comprehend, learn and investigate the IAS primary prospectus.

Q. Does UPSC Syllabus changes every year?

A. No, the IAS syllabus is very much static and before changing the syllabus, the UPSC needs to take approval from the Ministry of Personnel and Training.


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