Union Public Service Commission conducted the UPSC Prelims Exam 2025 on 25th May 2025 in nationwide exam centres. The official UPSC Prelims Answer Key 2025 is released at the official website of UPSC. The CSAT is qualifying in nature and candidates must secure at least 33% to be eligible for the General Studies Paper 1. The UPSC Prelims Answer Key 2025 has been shared below in the article. Candidates can use the answer key and official marking scheme to calculate your estimated score and check the correct answers.
UPSC Prelims Answer Key 2025
Analysing the UPSC Answer Key 2025 helps applicants to analyse the correct and incorrect responses, calculate the estimated marks. The official UPSC Answer Key 2025 has been uploaded on the official website on May 13, 2026. To download the UPSC Answer Key PDF candidates can check the instruction and direct link provided here.
UPSC Prelims Answer Key 2025 GS 1 PDF
Download the UPSC Prelims Answer Key 2025 for all sets of General Studies Paper 1 as released by UPSC for the reference of the candidates who appeared in UPSC Prelims Exam 2025 or planning to appear for upcoming exams.
| UPSC Prelims Answer Key 2025 - GS 1 | |
| GS Paper 1 SET | UPSC Answer Key PDF |
| GS Paper 1, Set A | Download PDF |
| GS Paper 1, Set B | Download PDF |
| GS Paper 1, Set C | Download PDF |
| GS Paper 1, Set D | Download PDF |
Also Read: UPSC Prelims 2025 Result
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UPSC Prelims Answer Key 2025 CSAT PDF
The UPSC CSAT Paper 2025 held in the shift 2 between 02:30 PM to 04:30 PM and consist of 80 multiple-choice questions (MCQs). This paper is qualifying in nature, requiring candidates to secure a minimum of 33% marks to be eligible for the evaluation of GS Paper I.
To assist candidates in assessing their performance, the UPSC Prelims Answer Key 2025 has been provided below- CSAT for all sets: Set A, B, C, and D.
| UPSC Prelims Answer Key 2025 CSAT | |
| CSAT Paper 1 SET | UPSC CSAT Answer Key PDFs |
| UPSC CSAT Answer Key 2025 (GS Paper 2, Set A) | Download PDF |
| CSAT Answer Key 2025 (GS Paper 2, Set B) | Download PDF |
| CSAT 2025 Answer Key (GS Paper 2, Set C) | Download PDF |
| CSAT Answer Key 2025 (GS Paper 2, Set D) | Download PDF |
UPSC Provisional Answer Key 2026
The Union Public Service Commission has introduced a new reform by releasing the UPSC Civil Services Preliminary Examination 2026 Provisional Answer Key soon after the exam. This step has been taken to improve transparency and give candidates an early assessment of their performance. Candidates can also raise the objection for any discrepancies found along with the submission of relevant sources till May 31st, 2026 06:00 PM. The key highlights related to the UPSC Prelims Answer Key 2026 has been tabulated below:
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UPSC Provisional Answer Key 2026 |
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Particulars |
Details |
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Conducting Body |
Union Public Service Commission |
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Exam Name |
UPSC Civil Services (Preliminary) Examination 2026 |
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Answer Key Type |
Provisional Answer Key |
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Release Status |
To be released soon after the examination |
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Purpose of Release |
Transparency and timely communication with candidates |
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Objection Mode |
Online |
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Official Portal |
QPRep (Online Question Paper Representation Portal) |
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Official Website |
https://upsconline.nic.in/ |
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Last Date for Objection |
May 31, 2026; 06:00 PM |
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Supporting Requirement |
Brief explanation with documents from three authentic sources |
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Review Process |
Evaluated by teams of subject experts |
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Final Answer Key |
Prepared after considering all valid representations |
UPSC Prelims Answer Key 2025 Marking Scheme
Aspirants can estimate their marks in the UPSC Prelims Answer Key 2025 using the official or unofficial answer keys and the marking scheme prescribed by the Union Public Service Commission (UPSC). The UPSC Prelims Exam 2025 comprise two papers, General Studies Paper 1 (GS-I) and CSAT Paper 2 (GS-II) with a total of 400 marks.
| UPSC Prelims Answer Key 2025 Marking Scheme | ||
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Particulars |
Paper 1 |
Paper 2 |
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Correct Answer |
+2 |
+2.5 |
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Incorrect Answer |
-0.66 |
-0.83 |
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Unanswered |
0 |
0 |
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No. of Questions |
100 |
80 |
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Total Marks |
200 |
200 |
Steps to Download UPSC Prelims Answer Key 2025
Candidates who are appearing in the UPSC Exam 2025 can follow the below mentioned Steps to Download UPSC Prelims Answer Key 2025:
Step 1: Visit the official UPSC website at upsc.gov.in
Step 2: Navigate to the “Examinations” tab on the homepage.
Step 3: Click on “UPSC Answer Key 2025” from the dropdown menu.
Step 4: Find and click on the link for “UPSC Prelims Answer Key 2025”.
Step 5: The Steps to Download UPSC Prelims Answer Key 2025 PDF will open in a new tab, click Download to save it for reference.
Last 5 Years UPSC Answer Key PDF
Candidates preparing for UPSC Exam 2026, solving previous year’s question papers and reviewing them using the UPSC Prelims Answer Key is a proven strategy for success. It helps in evaluating performance, identifying mistakes, and understanding the trend and pattern of questions.
| Year | UPSC Prelims GS1 Answer Key | CSAT Answer Key |
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2024 |
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2023 |
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2022 |
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2021 |
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2020 |
Last updated on July, 2026
→ UPSC Prelims Result 2026 is now out.
→ UPSC IFoS Prelims Result 2026 is now out.
→ Enroll in Vajiram & Ravi’s UPSC Mains Test Series 2026 for structured answer writing practice, expert evaluation, and exam-oriented feedback.
→ Join Vajiram & Ravi’s UPSC Mentorship Program 2026 for personalized guidance, strategy planning, and one-to-one support from experienced mentors.
→ Join Vajiram & Ravi’s UPSC Mentorship Program 2027 for personalized guidance, strategy planning, and one-to-one support from experienced mentors.
→ UPSC Prelims Provisional Answer Key 2026 out for GS Paper 1 and CSAT.
→ UPSC Prelims Question Paper 2026 Out, Download GS Paper 1 PDF conducted on 24th May 2026.
→ UPSC Mains 2026 will be conducted from 21st August 2026 onwards, and UPSC Prelims 2027 will be held on 23rd May 2027.
→ UPSC Final Result 2025 is now out.
→ UPSC has released UPSC Toppers List 2025 with the Civil Services final result on its official website.
→ Anuj Agnihotri secured AIR 1 in the UPSC Civil Services Examination 2025.
→ UPSC Notification 2026 & UPSC IFoS Notification 2026 is now out on the official website at upsconline.nic.in.
→ UPSC Calendar 2027 has been released.
→ Check out the latest UPSC Syllabus 2026 here.
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UPSC Prelims Answer Key 2025 FAQs
Q1. Will UPSC pattern change in 2026?+
Q2. Does UPSC release answer key for prelims?+
Q3. Who is the topper of UPSC 2025?+
Q4. How many attempts for UPSC 2025?+
Q5. Will optional be removed from UPSC 2026?+
Tags: UPSC prelims answer key UPSC prelims answer key 2025
