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UPSC PRELIMS 2026 · PAPER REVIEW

UPSC Prelims Exam Analysis 2026 · GS Paper I & CSAT

UPSC does not publish a paper analysis, difficulty ratings or attempt figures. This page covers what UPSC’s own documents confirm about the 24 May 2026 Prelims: the two papers, their questions, time and marks, the booklet and answer sheet, what a wrong answer costs and how candidates were shortlisted for the Mains.

Paper-wise review ↓ Marking maths 📊 Built from UPSC’s notice, press notes and the 2026 question papers. No unofficial difficulty or attempt numbers.
Overview

UPSC Prelims 2026: what we know

UPSC held the Civil Services (Preliminary) Examination 2026 on Sunday, 24 May 2026, in two sessions across India. Entry closed at 9:00 AM for the forenoon session and 2:00 PM for the afternoon session. The result came out on 15 June 2026, with 13,343 candidates qualifying for the Mains. UPSC does not publish difficulty ratings or good-attempt figures, and it releases Prelims marks, cut-offs and answer keys only after the final result of CSE 2026, which had not been declared as of 12 October 2026.

Prelims held
24 May 2026 (Sunday), two sessions
GS Paper I
100 questions · 200 marks · 2 hours
GS Paper II (CSAT)
80 questions · 200 marks · 2 hours · qualifying at 33%
Negative marking
One-third (0.33) of the question’s marks per wrong answer
Result
15 Jun 2026 — 13,343 qualified for the Mains
Marks, cut-offs & answer keys
Only after the CSE 2026 final result (not yet declared)
What you get

What this page covers

✓
Official paper structureQuestions, marks & time for both papers
✓
Official syllabus areasAs printed in the notice, word for word
✓
Penalty per wrong answerThe one-third rule and how it applies
✓
Booklet & answer sheetBilingual booklet, series, OMR sheet, black ball pen
✓
Shortlisting rulesGS Paper I list, 33% in CSAT
−
Difficulty & good attemptsNot published by UPSC — not shown
Per paper

Paper-wise review

Marks and time come from the notice, and the question counts from the covers of the 2026 question papers. Both papers are objective (multiple choice, four options per question) and both are compulsory. The areas below are the official syllabus headings. UPSC publishes no topic-wise weightage, so we don’t show any.

GS Paper I

100 Q · 200 marks · 2 hours · Hindi & English. Official syllabus: current events of national and international importance; History of India and Indian National Movement; Indian and World Geography; Indian Polity and Governance; Economic and Social Development; general issues on environmental ecology, bio-diversity and climate change; General Science.

GS Paper II (CSAT)

80 Q · 200 marks · 2 hours · Hindi & English · qualifying at 33%. Official syllabus: comprehension; interpersonal skills including communication skills; logical reasoning and analytical ability; decision making and problem solving; general mental ability; basic numeracy (Class X level); data interpretation (Class X level).

Booklet & answer sheet

Each paper comes as a test booklet in Hindi and English, in series A, B, C and D. Answers are marked on an OMR answer sheet, which (like the attendance list) must be filled with a black ball point pen only. Calculators are not allowed in the objective papers.

Exam-day rules

A printout of the e-admit card and the photo ID whose number is on it, for each session. Face authentication and frisking at the venue; entry closes 30 minutes before each session. Mobile phones, smart watches and bags are not allowed, and there is no safe-keeping at the venue.

See the full UPSC Prelims exam pattern
Official marking

What a wrong answer costs

Every question has four alternatives. For each wrong answer, one-third (0.33) of the marks assigned to that question is deducted. Marking more than one answer counts as a wrong answer, even if one of them is correct, and gets the same penalty. A question left blank costs nothing. The rule is the same in both papers:

PaperQuestions · marksPenalty per wrong answer
GS Paper I100 · 200One-third of that question’s marks
GS Paper II (CSAT)80 · 200One-third of that question’s marks
More than one answer marked—Treated as wrong; same penalty
Question left blank—No penalty

The notice gives each paper’s total marks and the one-third rule, but not a marks-per-question figure, so we don’t quote one. UPSC does not publish good-attempt numbers either, so we don’t show any. Candidates can raise objections to questions or the answer key through the Question Paper Representation Portal (QPReP), from the third day after the exam to 6 PM on the seventh day.

How candidates are shortlisted

Shortlisting & cut-offs

GS Paper II (CSAT) is qualifying, and you need at least 33% in it. Among those who clear it, UPSC draws the Mains list on GS Paper I marks, at a qualifying total it decides. About 12–13 times the vacancies are admitted to the Mains: 13,343 candidates against 1,016 vacancies for CSE 2026, compared with 14,161 against 1,087 for CSE 2025. UPSC publishes the result as a list of roll numbers. Marks, cut-offs and answer keys for the 2026 Prelims come out only after the CSE 2026 final result. For reference, UPSC’s official CSE 2025 Prelims cut-off (GS Paper I, out of 200) was 92.66 for General, 89.34 for EWS, 92.00 for OBC, 84.00 for SC and 82.66 for ST.

See the official CSE 2025 cut-offs
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FAQ

Analysis questions, answered

No. UPSC publishes the question papers, the exam scheme, the results and, after the final result, the marks, cut-offs and answer keys. It does not publish difficulty ratings or attempt figures, so any analysis you see online is unofficial opinion.
UPSC doesn’t publish any such figure, and it would change with every paper, so we don’t quote one. What is official is that each wrong answer costs one-third of that question’s marks, so accuracy matters as much as the number of questions you attempt.
For each wrong answer, one-third (0.33) of the marks for that question is deducted, in both papers. Marking more than one option counts as wrong. Unanswered questions carry no penalty.
UPSC’s result press note says the Prelims answer keys, marks and cut-offs will be uploaded on upsc.gov.in only after the entire CSE 2026 process is over, that is after the final result. UPSC had not announced a date for the final result as of 12 October 2026.

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