Download the UPSC Prelims Answer Key 2025 for GS Paper 1 and CSAT released by IAShub with detailed solutions. Analyze your performance, estimate scores, and access question papers and answer keys for all sets in PDF format.
theIAShub | 27 May, 2025 | 7574 | 0 |
The Union Public Service Commission has conducted the UPSC Prelims Exam 2025 on 25th May 2025 across exam centres nationwide. After the conclusion of the exam, the IAShub academic team released the unofficial UPSC 2025 Prelims Answer Key along with detailed solutions for both General Studies Paper 1 and CSAT. This will help aspirants analyze their performance and estimate their scores. Since CSAT is qualifying in nature, candidates must secure a minimum of 33% marks in Paper 2 to be considered for evaluation of Paper 1.
UPSC 2025 Prelims GS Paper 1 Download Question Paper PDF
The UPSC Prelims 2025 exam has been successfully conducted on 25th May 2025 (Sunday). The examination took place in two sessions — GS Paper 1 in the morning and CSAT Paper in the afternoon. With both papers now completed, aspirants can check the question papers to analyze the exam pattern and level of difficulty.
The official UPSC Prelims Answer Key 2025 will be released only when the final result of the Civil Services Examination 2025 is published. However, Top coaching institutes and academic platforms usually release memory-based UPSC Prelims Answer Keys within 24–48 hours of the exam. These unofficial answer keys are extremely helpful for on-the-spot analysis and for estimating scores in the interim.
| Feature | Details |
| Exam Name | UPSC Civil Services (Preliminary) Examination 2025 |
| Conducting Body | Union Public Service Commission (UPSC) |
| Exam Date | To be announced (expected between May–June 2025) |
| Paper Types | Paper I: General Studies (GS) |
| Paper II: CSAT (Civil Services Aptitude Test) | |
| Total Questions | Paper I: 100 questions |
| Paper II: 80 questions | |
| Unofficial Answer Key Release | Within 1–2 days after the exam (by coaching institutes) |
| Answer Key Format | PDF (subject-wise and set-wise: Set A/B/C/D) |
| Marking Scheme | Paper I: +2 for correct, -0.66 for incorrect |
| Paper II: Qualifying in nature (33% marks required) | |
| Where to Download | Official: https://upsc.gov.in |
| Unofficial: IASHub | |
| Purpose | Score estimation, cut-off prediction, Mains preparation planning |
Download UPSC 2025 CSAT Question Paper PDF
The official UPSC Prelims Answer Key 2025 will be released by the Commission only after the entire examination process is completed, including the Mains exam, Personality Test (Interview), and the Final Result.
However, aspirants do not need to wait that long. Just after the exam, the IAShub published the Unofficial UPSC Prelims Answer Key 2025 with Detailed Solutions for both GS Paper 1 and GS Paper 2 (CSAT) for ALL Sets. These answer keys were carefully curated by subject experts and included not only the correct options but also explanations and logical reasoning behind each answer to help aspirants understand the concepts better.
| Paper | Status |
| UPSC Prelims Answer Key 2025 – GS Paper 1 for All Sets | Download PDF |
| UPSC Prelims Answer Key 2025 – GS Paper 2 (CSAT) | To be released |
Also Check UPSC Prelims Answer Key with Solution
The UPSC Prelims 2025 GS Paper 1 Question Paper PDF is now available for download, helping candidates assess their attempts and align their preparation accordingly. The UPSC Civil Services Preliminary Examination 2025 is the most eagerly awaited exam for aspiring civil servants all over India. Following the successful execution of the exam, the aspirants impatiently anticipate gaining access to the UPSC 2025 Prelims Question Paper PDF in order to analyze their performance, estimate their marks, and strategize for the next stage – the Mains exam.
| Exam Name | Question Paper PDF |
| UPSC 2025 Prelims Paper 1 (GS) | Download PDF |
| UPSC 2025 Prelims Paper 2 (CSAT) | Download PDF |
Also Read:
Refer to the steps below to download the official UPSC Prelims Answer Key 2025 PDF for both GS Paper I and CSAT Paper II:
Step 1: Visit the Official UPSC Website
Step 2: Click on the “Examinations” Tab
Step 3: Select “Answer Keys
Step 4: Search for “Civil Services Preliminary Examination 2025”
Step 5: Click the Link and Download PDF
Step 6: Save and Use for Evaluation
The UPSC Civil Services Preliminary Examination 2024 was initially scheduled for May 26, 2024, but it was rescheduled to June 16, 2024, due to the 18th Lok Sabha elections.
The examination was conducted in two shifts:
| UPSC Prelims GS I Answer Key 2024 Official | UPSC Prelims CSAT Answer Key 2024 Official |
| Click to Download | Click to Download |
Also Read: UPSC Prelims Previous Years Papers
UPSC Civil Services Preliminary Examination answer keys (official and unofficial) are of utmost importance to know the trend, pattern, as well as your own preparation approach. Official answer keys are published by the UPSC only after the declaration of the final results, but several well-known coaching centers publish memory-based answer keys shortly after the exam. Here are the UPSC Answer Keys for the Last 5 Years – Download PDFs;
| Year | UPSC Prelims GS I Answer Key | UPSC Prelims GS II Answer Key (CSAT) |
| 2023 | UPSC Prelims GS I Answer Key 2023 | UPSC Prelims GS II Answer Key 2023 |
| 2022 | UPSC Prelims GS I Answer Key 2022 | UPSC Prelims GS II Answer Key 2022 |
| 2021 | UPSC Prelims GS I Answer Key 2021 | UPSC Prelims GS II Answer Key 2021 |
| 2020 | UPSC Prelims GS I Answer Key 2020 | UPSC Prelims GS II Answer Key 2020 |
| 2019 | UPSC Prelims Answer Key Paper I | UPSC Prelims Answer Key Paper II |
The UPSC Prelims Answer Key 2025 will be a crucial tool for aspirants who want to check their performance and establish their position in one of India’s most sought-after examinations. Even though the official answer key is published only after the final result, aspirants can gain a lot from unofficial answer keys published by well-known coaching centers within a day or two of the exam. Referencing the UPSC Prelims Answer Key for the past 5 years can also assist in determining trends, repeated topics, and preparing well for the Mains. Keep an eye on the official UPSC site and reliable sites such as IASHub for regular updates and PDF downloads.
You can download the official answer key from the website of UPSC (https://upsc.gov.in) under the "Answer Keys" category. Unofficial answer keys will be posted on coaching websites such as IASHub.
Yes, official and unofficial UPSC Prelims Answer Keys are typically released set-wise (Set A, B, C, and D) for Paper I (GS) and Paper II (CSAT).
Yes, UPSC releases official answer keys for GS Paper I and CSAT Paper II after the announcement of the final results.
Unofficial answer keys are based on memory-based questions and expert judgments. Though they are not 100% correct, they provide a relatively reliable estimate for tentative score calculation before the official key is released.
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