The UPSC Civil Services Preliminary Examination 2025 for both General Studies Paper 1 (GS Paper 1) and CSAT Paper 2 (GS Paper 2) has now concluded successfully. In light of this, top coaching institutes and subject experts have released the unofficial answer keys for both papers. Candidates can now download these unofficial UPSC Prelims answer keys to evaluate their performance, verify their responses, and estimate their probable scores well before the official answer keys are published. Whether you appeared for the exam or are planning for future attempts, these answer keys offer valuable insights into the question patterns and help in better preparation strategies.

UPSC Prelims Answer Key 2025 Overview

The UPSC Civil Services Preliminary Examination 2025 was conducted on 25th May 2025 in two shifts across various exam centers in India. The General Studies Paper I (GS Paper 1) took place from 9:30 AM to 11:30 AM, and the CSAT Paper II was held from 2:30 PM to 4:30 PM. As is customary, the unofficial answer key for GS Paper 1 has been released by leading coaching institutes and subject matter experts, helping candidates evaluate their performance and calculate their expected scores. However, the official UPSC Answer Key 2025, including for both GS Paper 1 and CSAT Paper 2, will be published only after the entire Civil Services Examination process is completed—including the Mains, Interview, and Final Result. Aspirants can use these unofficial answer keys as a provisional guide until the official PDFs are made available on the UPSC website.

UPSC Prelims Answer Key 2025 Download PDF

How to Download UPSC Prelims Answer Key?

The UPSC Prelims Answer Key 2025 is officially released by the Union Public Service Commission (UPSC) after the complete exam process is over, including the final result declaration. This answer key is released for both General Studies Paper I and CSAT Paper II.

• Visit the official UPSC website:
  Go to https://www.upsc.gov.in
• Click on the ‘Examination’ tab on the top menu.
• Select ‘Answer Keys’ from the dropdown.
• Look for the section titled ‘Civil Services Preliminary Examination’.
• Click on the links for ‘GS Paper I’ and ‘CSAT Paper II’.
• Download the PDF for your respective question paper set (Set A, B, C, or D).
• Match your answers with the official key to calculate your probable score.

UPSC Prelims Answer Key – Year-Wise PDF Download (2019–2024)

The UPSC Prelims Answer Key 2025 is released by the Union Public Service Commission only after the final results of the Civil Services Examination are declared. Although it may not help the candidates who already took that year’s exam, it is highly valuable for future aspirants.

Conclusion

Using the UPSC Prelims Answer Key 2025, both official and unofficial vital for every aspirant aiming to crack one of the toughest exams in the country. It enhances your understanding of the question pattern, your accuracy, and the quality of your preparation. Bookmark this page to get updated links as soon as the UPSC Prelims Answer Key 2025 is released. 

UPSC Prelims Answer Key 2025 FAQs

When will the UPSC Prelims Answer Key 2025 be released?

The official UPSC Prelims Answer Key 2025 will be released after the final result, expected in the first quarter of 2026. However, unofficial answer keys by top coaching institutes will be available within 24–48 hours after the exam.

Where can I download the UPSC Prelims Answer Key PDF?

 You can download the UPSC Prelims Answer Key PDF from the official UPSC website at under the “Examination → Answer Keys” section. Year-wise and set-wise PDFs will be listed there once available.

How does the UPSC Prelims Answer Key help in score calculation?

By using the UPSC Prelims Answer Key, candidates can match their answers with the official ones and calculate their probable score. This helps in evaluating their performance even before the result is declared.

Is the UPSC Prelims Answer Key the same for all question sets?

No. The UPSC Prelims Answer Key is released set-wise (Set A, B, C, and D) for both GS Paper I and CSAT Paper II. Candidates must download the key for their specific question set.

Are unofficial UPSC Prelims Answer Key reliable?

While unofficial UPSC Prelims Answer Keys from coaching institutes are not official, they are usually prepared by experts and can provide a fairly accurate estimate of your score until the official answer key is released.