UPSC Prelims Answer Key 2026: GS Paper 1 & CSAT PDF Download, Score Calculation, Objection Process.The Union Public Service Commission (UPSC) conducted the Civil Services Preliminary Examination 2026 on 24 May 2026 across multiple exam centres in India. Lakhs of aspirants who appeared for the exam are now eagerly waiting for the UPSC Prelims Answer Key 2026 for General Studies Paper 1 and CSAT Paper 2.
As per the latest updates, UPSC may release the provisional answer key shortly after the examination under its newly introduced reform system. Candidates will also get an opportunity to raise objections through the official QPRep portal.
UPSC Prelims Answer Key 2026 Highlights
| Particulars | Details |
|---|---|
| Exam Name | UPSC Civil Services Preliminary Examination 2026 |
| Conducting Body | Union Public Service Commission (UPSC) |
| Exam Date | 24 May 2026 |
| Papers | GS Paper 1 & CSAT Paper 2 |
| Exam Mode | Offline |
| Answer Key Type | Provisional |
| Official Website | upsc.gov.in |
| Objection Mode | Online via QPRep Portal |
| Last Date for Objections | 31 May 2026 (Expected) |
UPSC Prelims 2026 Exam Timing
| Paper | Timing |
|---|---|
| GS Paper 1 | 9:30 AM to 11:30 AM |
| CSAT Paper 2 | 2:30 PM to 4:30 PM |
UPSC Prelims Answer Key 2026 PDF
The UPSC provisional answer key will be released for:
- General Studies Paper 1
- CSAT (Paper 2)
- Set-wise Question Papers
- Official Solutions PDF
Several coaching institutes have also released unofficial answer keys and memory-based solutions immediately after the examination.
How to Download UPSC Prelims Answer Key 2026
Candidates can follow these simple steps:
- Visit the official UPSC website upsc.gov.in
- Click on the “Examinations” section
- Open the “Answer Keys” tab
- Select “Civil Services Preliminary Examination 2026”
- Choose GS Paper 1 or CSAT answer key PDF
- Download and save the PDF for future reference
UPSC Prelims 2026 Marking Scheme
GS Paper 1
| Response Type | Marks |
|---|---|
| Correct Answer | +2 Marks |
| Incorrect Answer | -0.66 Marks |
| Unattempted | 0 Marks |
CSAT Paper 2
| Response Type | Marks |
|---|---|
| Correct Answer | +2.5 Marks |
| Incorrect Answer | -0.83 Marks |
| Unattempted | 0 Marks |
The CSAT paper is qualifying in nature, and candidates must secure at least 33% marks (66 out of 200) to qualify.
How to Calculate UPSC Prelims Score 2026
Candidates can estimate their marks using the formula:
GS Paper 1 Formula
Score = (Correct Answers × 2) − (Incorrect Answers × 0.66)
CSAT Formula
Score = (Correct Answers × 2.5) − (Incorrect Answers × 0.83)
For example, if a candidate answers 60 questions correctly and 15 incorrectly in GS Paper 1:
Score = (60 × 2) − (15 × 0.66)
= 120 − 9.9
= 110.1 Marks
UPSC Prelims Answer Key 2026 Objection Process
For the first time, UPSC is expected to allow candidates to challenge the provisional answer key through the Question Paper Representation Portal (QPRep).
Steps to Raise Objection
- Visit upsconline.nic.in
- Open the QPRep Portal
- Login using registration ID and password
- Select the question to challenge
- Upload supporting documents from authentic sources
- Submit the objection before the deadline
Candidates may need to upload up to three supporting documents from NCERT books, government publications, or standard reference materials.
UPSC Prelims GS Paper 1 Answer Key 2026 (Set A)
Several institutes have released provisional answers for GS Paper 1 Set A. Some of the memory-based answers include:
| Question | Answer |
|---|---|
| Q1 | D |
| Q2 | A |
| Q3 | C |
| Q4 | B |
| Q5 | B |
The complete set-wise answer key and detailed explanations are being updated by coaching institutes after expert analysis.
Importance of UPSC Prelims Answer Key 2026
The answer key helps candidates:
- Estimate expected scores
- Analyse performance
- Predict cutoff chances
- Identify weak areas
- Begin Mains preparation early
- Understand latest exam trends
Experts believe UPSC Prelims 2026 was analytical and concept-oriented in nature, focusing heavily on conceptual clarity and current affairs integration.
