UPSC Prelims 2025 Answer Key PDF Out: GS Paper 1 & CSAT

The Union Public Service Commission (UPSC) has officially conducted the Civil Services Preliminary Examination 2025. The exam was held in two shifts — the first from 9:30 AM to 11:30 AM (General Studies Paper 1), and the second from 2:30 PM to 4:30 PM (GS 2-CSAT). After the prelims exam, students were seen feeling relieved and relaxed, as their months of hard work and consistent preparation had finally been put to the test.

UPSC Aspirants across India are now eagerly waiting for the Answer Key to match their responses. The official Answer Key for UPSC CSE Prelims 2025 is yet to be released. However, coaching institutes and experts have released their solutions within hours of the exam. If you're curious to estimate your scores, understand the question trends, or analyze your chances in the UPSC Prelims 2025, you can refer to these unofficial answer keys. In this article, we have provided the answer keys of all the prominent UPSC Coaching centres across the country. 

What is the UPSC Civil Services Prelims 2025 Answer Key?

The UPSC Civil Services Prelims 2025 Answer Key is a set of solutions to the questions asked in the Preliminary Examination. The official answer key for the prelims exam will be released by the UPSC in the next few days. However, if you’ve just walked out of the UPSC exam hall with mixed feelings, the unofficial answer key is your best friend right now. Top coaching institutes and UPSC mentors often release their answer key on the same day of the exam.  You can check your responses, get a rough idea of your score, and even predict your chances of clearing the cutoff. 

UPSC CSE Prelims 2025 Answer Keys: General Paper 1 (GS Paper 1)

Here is the answer key for Civil Services Prelims 2025 General Paper 1 (GS Paper 1) of the Top 10 UPSC Coaching Institutes in India.

You can download by clicking on the links below:

Coaching Institute	Answer Key (General Paper 1)
Vision IAS	Uploading Soon
Vajiram and Ravi	Download PDF(SET A) Download PDF(SET B) Download PDF(SET C) Download PDF (SET D)
Drishti IAS	Uploading Soon
PhysicsWallah (PW)	Uploading Soon
ClearIAS	Uploading Soon
ForumIAS	Download PDF (SET A) Download PDF(SET B) Download PDF(SET C) Download PDF(SET D)
IASbaba	Uploading Soon
Rau’s IAS	Uploading Soon
Insights IAS	Download PDF (SET A) Download PDF(SET C) Download PDF (SET D)
Plutus IAS	Uploading Soon

UPSC CSE Prelims 2025 Answer Keys: CSAT (GS Paper 2)

Here is the answer key for Civil Services Prelims 2025 CSAT  (GS Paper 2) of the Top 10 UPSC Coaching Institutes in India:

Coaching Institute	Answer Key (CSAT)
Vision IAS	Uploading Soon
Vajiram and Ravi	Uploading Soon
Drishti IAS	Uploading Soon
PhysicsWallah (PW)	Uploading Soon
ClearIAS	Uploading Soon
ForumIAS	Uploading Soon
IASbaba	Uploading Soon
Rau’s IAS	Uploading Soon
Insights IAS	Uploading Soon
Plutus IAS	Uploading Soon

How to Calculate Your UPSC CSE Prelims 2025 Score Using the Answer Key?

Paper	Total Questions	Marks per Correct Answer	Negative Marking (Per Wrong Answer)
GS Paper 1	100	+2	-0.66
CSAT	80	+2.5	-0.83

Remember:

• Only Paper 1 (GS) counts towards the cutoff.
• CSAT is qualifying only — you need to score at least 33% (i.e., 66 marks) to clear it.

Simple Score Calculation Formula for UPSC CSE Prelims 2025

You can use the formula below to calculate your expected marks in UPSC Civil Services Prelims 2025 based on the answer keys of different coaching institutes-

Paper	Formula
GS Paper 1	(Correct × 2) – (Wrong × 0.66)
CSAT Paper 2	(Correct × 2.5) – (Wrong × 0.83)

Conclusions

The UPSC Civil Services journey is no less than a rollercoaster. With the completion of Prelims 2025, you’ve taken one of the biggest steps forward. Whether you’re confident about your attempt or still replaying a few tricky questions in your head, checking the answer keys is a great way to get some clarity. Evaluate your performance and reflect on your next steps. Your performance in prelims will decide whether you gearing up for Mains or not. If you are not confident about your performance, then remember that one exam doesn’t define your worth. Our discipline, effort, and dedication never go in vain.