UPSC Prelims Exam Pattern 2027: Marks, Questions & Negative Marking
Deeksha Dixit15 Oct, 2026
UPSC Civil Services Preliminary Examination (CSE Prelims) is the first stage of the UPSC Civil Services Examination and serves as a screening test for candidates appearing for the Main Examination. Understanding the UPSC Prelims Exam Pattern 2027 is essential for planning preparation, mock tests, revision, and time management effectively.
The UPSC Prelims consists of two objective-type papers: General Studies Paper I (GS Paper I) and General Studies Paper II (CSAT). Both papers carry 200 marks and are conducted on the same day in two separate sessions. While GS Paper I is considered for determining the Prelims cut-off, CSAT is qualifying in nature and requires a minimum of 33% marks.
Since the official notification for 2027 is yet to be announced, the information provided below is based on the UPSC CSE 2026 Notification and will be updated after the release of the latest notification. The rules generally remain unchanged unless UPSC announces any revision in the official notification.
UPSC Prelims 2027 Important Dates
The table below provides important details about the UPSC Prelims 2027.
| Event | Date |
| UPSC CSE Notification Release | 13 January 2027 |
| Online Application Starts | 13 January 2027 |
| Last Date to Apply | 2 February 2027 |
| Application Correction Window | As notified by UPSC |
| UPSC Prelims Admit Card | May 2027 (Expected) |
| UPSC Prelims Exam Date | 23 May 2027 |
| UPSC Prelims Result | June 2027 (Expected) |
| UPSC Mains Exam Begins | 20 August 2027 (continues for 5 days) |
UPSC Prelims Exam Pattern 2027
The Preliminary Examination consists of two objective-type papers conducted on the same day.
UPSC Prelims Exam Pattern
The table below provides a quick overview of the UPSC Prelims Examination.
| Paper | Subject | Marks | Questions | Marks per Question | Duration |
| Paper I | General Studies | 200 | 100 | 2 Marks | 2 Hours |
| Paper II | CSAT | 200 | 80 | 2.5 Marks | 2 Hours |
The key Highlights of the UPSC Prelims Exam are:
-
Objective (MCQ) based examination
-
Conducted through an OMR-based written test.
-
Both papers conducted on the same day
-
Paper II (CSAT) is qualifying in nature
-
Marks of GS Paper I are considered for Prelims qualification
UPSC Prelims Marking Scheme 2027
The Preliminary Examination follows a negative marking system.
| Particular | General Studies Paper I | CSAT (Paper II) |
| Total Marks | 200 | 200 |
| Total Questions | 100 | 80 |
| Marks per Question | 2 Marks | 2.5 Marks |
| Correct Answer | +2 Marks | +2.5 Marks |
| Incorrect Answer | –0.66 Marks approx (1/3rd of allotted marks) | –0.83 Marks approx (1/3rd of allotted marks) |
| Unanswered Questions | No Negative Marking | No Negative Marking |
| Qualifying Requirement | Marks considered for Prelims cut-off | Minimum 33% (66.67 Marks) required |
| Merit Calculation | Counted for shortlisting to Mains | Qualifying only; marks not included in merit |
Candidates must qualify CSAT to have their GS Paper I evaluated.
Explore Complete UPSC Prelims Study Material 2027 – Click Here
Negative Marking in UPSC Prelims 2027
The Preliminary Examination follows a penalty system for incorrect answers.
-
One-third (⅓) of the allotted marks are deducted for every incorrect answer.
-
No deduction for unanswered questions.
-
Multiple responses to a single question are treated as incorrect.
Example:
Suppose a candidate attempts 90 questions in GS Paper I:
-
Correct Answers: 60 × 2 = 120 Marks
-
Incorrect Answers: 30 × 0.66 = 19.8 Marks (Deducted)
-
Final GS-I Score = 120 – 19.8 = 100.2 Marks
Similarly, in CSAT, a candidate must score at least 66.67 marks (33%) to qualify. However, CSAT marks are not included in determining the Prelims cut-off or merit.
| Paper | Formula |
| GS Paper I | Final Score = (Number of Correct Answers × 2) − (Number of Incorrect Answers × 0.66) |
| CSAT | Final Score = (Number of Correct Answers × 2.5) − (Number of Incorrect Answers × 0.83) |
Join PhysicsWallah's UPSC Prelims Test Series today and Strengthen Your Preparation with Exam-Level Practice.
UPSC Prelims Exam Timings 2027
The Preliminary Examination consists of two objective-type papers conducted in two sessions.
| Paper | Subject | Reporting Time | Timing | Duration |
| Paper I | General Studies | 8:30 AM onwards | 9:30 AM – 11:30 AM | 2 Hours |
| Paper II | CSAT | 1:30 PM onwards | 2:30 PM – 4:30 PM | 2 Hours |
UPSC Prelims Syllabus 2027
Candidates are advised to go through the Syllabus published in this Section for the Preliminary Examination, as periodic revision of syllabus has been done in several subjects.
GS Paper I includes:
-
Current events
-
History
-
Geography
-
Polity and governance
-
Economic and social development
-
Environment, ecology and biodiversity
-
General science
CSAT includes:
-
Comprehension
-
Interpersonal/communication skills
-
Logical reasoning and analytical ability
-
Decision-making and problem-solving
-
General mental ability
-
Basic numeracy
-
Data interpretation
Download UPSC Syllabus PDF:
Is CSAT Qualifying in UPSC Prelims?
Yes. CSAT is qualifying in nature.
Candidates must secure at least 33% marks in General Studies Paper II. Since CSAT is not used for determining the Prelims merit cut-off, a candidate's performance in GS Paper I remains crucial for clearing the screening stage.
However, merely scoring well in GS Paper I is not sufficient. Candidates must also qualify CSAT.
UPSC Prelims PYQs with Answer Keys (2014-2026)
How Is the UPSC Prelims Cut-off Determined?
The Preliminary Examination cut-off is determined on the basis of GS Paper I, subject to the applicable category-wise cut-off announced by UPSC.
CSAT does not contribute to the Prelims cut-off because it is qualifying in nature. Candidates must separately secure the prescribed minimum marks in CSAT.
The actual cut-off can vary from year to year depending on factors such as:
-
Difficulty level of the question paper
-
Number of candidates appearing
-
Number of vacancies
-
Overall performance of candidates
-
Distribution of marks
Therefore, aspirants should focus on maximising their GS Paper I score rather than preparing around a fixed expected cut-off.
What Happens After UPSC Prelims?
Candidates who qualify the Preliminary Examination become eligible to appear for the UPSC Civil Services Main Examination.
The overall selection process can be understood in three major stages:
| Stage | Examination | Purpose |
| Stage 1 | Preliminary Examination | Screening Test |
| Stage 2 | Main Examination | Descriptive Written Examination |
| Stage 3 | Personality Test | Interview and Personality Assessment |
Only the marks obtained in the Mains Examination and Personality Test are considered for the final merit ranking, subject to the prescribed rules.
Conclusion
Understanding the UPSC Prelims Exam Pattern 2027 is the first step towards building an effective preparation strategy. Candidates must prepare seriously for both GS Paper I and CSAT, while giving particular attention to negative marking, time management, PYQs, and regular mock-test practice.
PhysicsWallah provides comprehensive study material, test series, current affairs, and expert guidance to help aspirants prepare effectively for the UPSC Civil Services Preliminary Examination 2027.
