The provisional IISER IAT Answer Key 2025 was issued on May 26, 2025, after the exam was conducted. Candidates can download it from the official website. Aspirants who appeared for the exam can use the answer key to estimate their scores. To do this accurately, they must understand the official marking scheme. Candidates who score above the IISER cut-off will be shortlisted for the next stage of the admission process. The IISER Aptitude is conducted once a year for admission to science and related courses at various IISER campuses. It is a 3-hour exam that includes questions from Biology, Chemistry, Physics, and Mathematics. The answer key is released in two phases- provisional and final. Candidates can raise objections to the provisional answer key within a limited time, to be announced on the official website.

Read on, to know more about the IISER Answer Key, the steps to download it, and other important details.

Download the IISER IAT Provisional Answer Key 2025 PDF

How to Download IISER IAT Answer Key 2025?

The candidates can simply download the IISER IAT Answer Key from the official website. The steps to download the same are as follows:

Step 1: Visit the IISER website at https://www.iiseradmission.in/

Step 2: Click the link to download the IISER answer key 2025 

Step 3: Download and save the answer key for reference.

Get an idea of the IISER Result and the steps to check it here!

How to Calculate the Marks Using IISER IAT Answer Key 2025?

The Indian Institutes of Science Education and Research (IISER) is the conducting authority for the IISER Exam. After the exam was completed for all candidates, the board released the provisional answer key. After going through the recommendations of the candidates, the board will release a final answer key that is helpful in the calculation of the marks. The candidates can download the answer key from the official website along with the response sheets, and then follow the steps mentioned below to calculate the marks they scored.

Step 1: Download the IISER Answer Key from the official website at https://www.iiseradmission.in/ and open it along with the response sheet.

Step 2: Next, compare the answers marked by the authorities against each question with the ones marked by the candidates.

Step 3: Now, for each correct answer marked by the candidate add 3 marks and deduct 1 mark for every wrong answer attempted.

Step 4: In the end, the candidate is required to add up all the correct answers and arrive at the final raw score that he/she has obtained.

Get a direct link to the IISER Books for preparation here!

What does it mean to Challenge IISER IAT Answer Key?

The exam conducting authorities will provide a chance to the test takers to file in their obligations if any discrepancy is detected. Applicants can challenge the tentative answer key for IISER 2025 before the facility shuts down. The format to challenge the answer key will be notified by the concerned authorities soon. Stay tuned!

Learn about the IISER Counselling Process right here!

Also check IISER IAT Previous Year Papers, here

The candidates who are preparing for the upcoming IISER exam can check the article to get an insight into downloading and raising objections against the IISER Answer Key 2025. To get more updates regarding ongoing recruitment processes and upcoming exams, candidates can visit the Testbook or download the Testbook App for exam preparation.