UPSC CSE exam pattern, syllabus and eligibility: your starting guide

If you are starting UPSC preparation, begin by understanding what you will be asked to do. You will solve objective questions in Prelims, write descriptive answers in Mains, and discuss issues in the Personality Test. Each stage needs a different kind of practice.

This guide explains the structure using the 2026 CSE notice. For a later attempt, compare it with that year’s notification before you apply. You can use our exam calendar guide to find the official schedule.

See how the stages fit together

Stage	What you do	How the marks count
Prelims	Take General Studies I and General Studies II, usually called CSAT	Screening only
Mains written examination	Write nine papers, including two qualifying language papers	Seven papers contribute 1,750 marks
Personality Test	Attend an interview after qualifying the written stage	Adds up to 275 marks

The final merit total is 2,025 marks. Your Prelims score does not get added to it. Qualifying Prelims gives you access to the next stage; it does not give you a head start in final marks.

Check your eligibility before committing to an attempt

Read the eligibility section of the official notice with your date of birth, qualification, category, and earlier attempts in front of you. Do not calculate eligibility from your age today alone.

For the 2026 examination, the general age rule is at least 21 and below 32 on 1 August 2026. The notice sets out category relaxations, qualification requirements, nationality conditions, and rules for candidates already allocated a service. IAS and IPS require Indian citizenship; other participating services have additional nationality provisions.

The usual attempt limits in that notice are six for General/EWS, nine for eligible OBC candidates, and unlimited for SC/ST candidates within the applicable age and other eligibility rules. PwBD provisions and restrictions for previously selected candidates need a separate check. Appearing in either Prelims paper counts as an attempt.

Treat these points as an orientation. Your eligibility depends on the full notice and supporting documents, not a short table on a preparation website.

Prepare both Prelims papers

GS I and CSAT each carry 200 marks and have a two-hour duration. CSAT is qualifying at 33%; GS I determines the screening cut-off once that condition is met. Wrong objective answers attract a penalty of one-third of the marks assigned to the question. Unanswered questions do not attract that penalty.

For GS I, organise your study around history, geography, polity, economy and social development, environment, science, and current events. Keep the official syllabus open while choosing chapters. A chapter belongs in your plan because it helps you understand a syllabus area or a relevant question, not because a resource list happens to include it.

For CSAT, diagnose your comprehension, reasoning, and numeracy early. Our CSAT guide with solved examples shows how to turn mistakes into specific practice.

Understand the Mains papers

Papers	Marks	Your preparation task
Indian language and English	300 each; qualifying	Practise the required language exercises and check exemption provisions
Essay	250	Build a sustained argument with relevant examples
GS I, II, III and IV	250 each	Explain, analyse, and answer the precise question
Optional subject, two papers	250 each	Study your chosen syllabus in depth

Read the detailed official syllabuses before choosing an optional subject. Interest, your ability to understand the material, and access to feedback matter. A high success percentage in a small historical group does not make a subject suitable for everyone; see how to interpret UPSC success rates.

You can start answer writing with a topic you have already studied. The Mains answer-writing guide includes an original question, an illustrative answer, and a way to review your own response.

Turn the syllabus into a usable notebook

Divide a notebook or document by syllabus area. Under each topic, keep three things: a short explanation in your own words, a relevant example, and a question you could not answer.

Suppose you finish a chapter on Parliament. Close the book and explain how an executive is held accountable. Then attempt a question on that theme. If your answer is vague, return to the relevant section and improve the explanation. That small cycle tells you more than highlighting several pages.

Start with the NCERT reading order if your basic concepts need work. If you need help fitting reading and practice into your week, use the first 30 days preparation plan.