UPSC Prelims Answer Key 2025 Out, GS 1, CSAT, Steps to Download

The Union Public Service Commission (UPSC) will conduct the UPSC Prelims Exam 2025 on 25th May 2025 across various centres nationwide. Following the conclusion of the exam, the unofficial UPSC Prelims Answer Key 2025 will be shared on the page below for reference. It is important to note that the CSAT paper is qualifying in nature, and candidates must secure a minimum of 33% marks to be considered for evaluation of the General Studies Paper I.

The UPSC Prelims Answer Key 2025 provided below is provisional and curated to help aspirants estimate their scores. The official UPSC Prelims Answer Key 2025 will be released by the Commission at a later date. Candidates are advised to use the marking scheme to assess their performance and estimate the marks.

UPSC Prelims GS 1 Detailed Answer Key 2025

UPSC Prelims Answer Key 2025

UPSC Prelims Answer Key 2025 enables candidates to evaluate their performance by identifying correct and incorrect responses and estimating their score. While the official UPSC Answer Key 2025 will be released on the Commission’s website after the conclusion of the UPSC Recruitment 2025, 

Candidates who have appeared in the UPSC Exam 2025 can refer to the unofficial UPSC Prelims Answer Key 2025 for General Studies Paper 1 and CSAT, prepared by subject-matter experts. These answer key PDFs serve as a valuable resource for assessing the chances of qualifying for the next stage.

UPSC Prelims Answer Key 2025 – GS 1

Candidates can download the UPSC Prelims Answer Key 2025 for all sets of the General Studies Paper 1 from the links shared below. These answer keys are intended to assist aspirants who appeared for the UPSC Prelims Exam 2025 as well as those preparing for future attempts.

UPSC Prelims GS 1 Answer Key 2025 Set-wise (Unofficial)

Also Read: UPSC Prelims Exam Analysis 2025

UPSC Prelims Answer Key 2025 – CSAT

The UPSC CSAT Paper 2025 is scheduled from 2:30 PM to 4:30 PM and comprises 80 multiple-choice questions (MCQs). As a qualifying paper, candidates must obtain at least 33% marks to be considered eligible for the evaluation of their General Studies Paper I.

To help candidates in evaluating their performance, the UPSC Prelims Answer Key 2025 – CSAT has been provided for all sets, Set A, B, C, and D.

UPSC Prelims CSAT Answer Key 2025 Set-wise (Unofficial)

UPSC Prelims Answer Key 2025 – Marking Scheme

Aspirants can estimate their scores in the UPSC Prelims 2025 by referring to the provisional answer keys with the marking scheme outlined by the Union Public Service Commission (UPSC). The prelims exam consists of two papers, General Studies Paper I (GS-I) and the Civil Services Aptitude Test (CSAT) Paper II (GS-II), with a combined maximum of 400 marks. 

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 the 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.

The official UPSC Prelims Answer Key 2025 will be released only upon the completion of the entire UPSC CSE 2025, which generally takes place after the declaration of the final results. Until then, candidates may rely on expert-curated provisional answer keys to evaluate their performance and estimate their scores.

Also Read: UPSC Prelims Question Papers 2025

Last 5 Years UPSC Answer Key PDF

For aspirants preparing for the UPSC Exam 2025, solving previous year’s question papers and reviewing them with the help of the UPSC Prelims Answer Key is a highly effective preparation strategy. Refer to the table below to download the Last 5 Years UPSC Answer Key PDF: