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UPSC Prelims pattern — GS Paper I and CSAT, marks, cut-off

UPSC Prelims has two papers — General Studies and CSAT. This guide breaks down the pattern, marking scheme, time limits, and typical cut-offs.

Updated 28 May 2026

The Preliminary Examination is the first of three stages of the UPSC Civil Services Examination. It is an objective, machine-graded screening test. The Prelims score does not count towards the final ranking — its only job is to filter the applicant pool down to candidates who will write Mains. About 0.5 to 0.7 percent of those who appear for Prelims eventually make the final list, so even though Prelims looks small, the bar is high.

The two papers at a glance

Both papers are held on the same day. Each is two hours long, has 100 objective questions in the case of GS Paper I and 80 in the case of CSAT, and carries 200 marks.

  • GS Paper I — 100 questions, 200 marks, two hours. Each correct answer scores 2 marks. Wrong answers carry a negative penalty of one-third of the marks for that question.
  • CSAT Paper II — 80 questions, 200 marks, two hours. Most questions are 2.5 marks; reasoning questions are sometimes weighted differently. Wrong answers carry the same one-third negative marking. CSAT is qualifying — you need at least 33 percent (66 marks).
  • Only GS Paper I marks decide who qualifies for Mains.

GS Paper I syllabus

GS Paper I covers a wide spread of subjects but the question count distribution is roughly stable year on year.

  • Current events of national and international importance — typically 15 to 25 questions, with environment and economy current affairs woven in.
  • History of India and the Indian National Movement — 12 to 18 questions, with ancient, medieval, and modern history sub-divided.
  • Indian and World Geography (physical, social, economic) — 10 to 15 questions.
  • Indian Polity and Governance — 12 to 18 questions, drawn predominantly from the Constitution and amendments.
  • Economic and Social Development, Poverty, Inclusion, Sustainable Development — 10 to 14 questions.
  • Environment, Biodiversity, and Climate Change — 12 to 18 questions, with growing weight every year.
  • General Science — 8 to 12 questions, increasingly tied to current biotech, space, and health developments.

CSAT Paper II — qualifying but cannot be ignored

CSAT is officially qualifying, but every year a non-trivial number of strong GS candidates miss Mains because they did not clear 33 percent in CSAT. From 2023 onwards CSAT difficulty has spiked — particularly in reasoning and basic mathematics. Treat it as qualifying, not as ignorable.

  • Comprehension — reading passages and inferential questions.
  • Interpersonal and communication skills — rare and often clubbed with comprehension.
  • Logical reasoning and analytical ability — syllogisms, seating arrangements, blood relations.
  • Decision making and problem solving — case-style questions on administrative scenarios.
  • General mental ability and basic numeracy at Class X level.
  • Data interpretation — tables, graphs, sufficiency.

Cut-off trends

Cut-offs are published by UPSC after each cycle and vary by category. As a planning anchor, the General category Prelims cut-off in recent years has been:

  • 2024 — around 87 marks (out of 200).
  • 2023 — around 75 marks.
  • 2022 — around 88 marks.
  • 2021 — around 87 marks.
  • 2020 — around 92 marks.

How to think about Prelims preparation

A Prelims-ready candidate has done three things: read every standard textbook (Laxmikanth, Spectrum, Shankar IAS, NCERT class 6–12) at least twice, layered nine to twelve months of current affairs on top, and practised every Prelims paper from 2014 onwards under timed conditions. The third leg is non-negotiable — pattern recognition from PYQ practice is what separates a 75-marks candidate from a 105-marks candidate.

Sambodh IAS structures Prelims practice around this PYQ-first principle. Every question from 2014 to 2026 is tagged by concept and by source chapter, so when you get something wrong, the platform sends you back to the specific page that would have answered it.

Frequently Asked Questions

Is CSAT qualifying or counted in the cut-off?

CSAT is qualifying only. You need 33 percent (66 marks out of 200) to qualify. CSAT marks do not contribute to the Prelims cut-off — only GS Paper I marks decide who writes Mains.

How many questions should I attempt in Prelims GS?

Most successful candidates attempt between 78 and 92 of the 100 questions in GS Paper I. Attempting too few starves you of marks; attempting too many at random hurts you via negative marking. Build the right attempt instinct through full-length mock papers.

What is the negative marking in Prelims?

For each wrong answer, one-third of the marks allotted to that question is deducted. There is no penalty for un-attempted questions. Blank guessing is mathematically negative-expected-value; informed elimination is positive-expected-value.

When is the Prelims examination held?

Prelims is typically held on a Sunday in May or early June. The exact date is announced in the official notification, usually published in February.

Ready to put this into practice?

Sambodh IAS turns UPSC preparation into an adaptive, feedback-driven loop.

Related guides

UPSC Prelims syllabus — GS Paper I and CSAT in detail

The full UPSC Prelims syllabus for GS Paper I (current affairs, history, polity, economy, geography, environment, science) and CSAT Paper II.

CSAT preparation — qualifying paper that you cannot ignore

CSAT is qualifying at 33 percent but has eliminated many GS-strong candidates in recent years. A focused, low-time-cost plan for clearing CSAT comfortably.

Why PYQ analysis is the highest-leverage thing in Prelims prep

UPSC previous-year questions (PYQs) are the most underused study material in Indian competitive exams. Why they matter, how to analyse them, and how to use them as a feedback loop.