IISER 2026 Answer Key: IAT Answer Key, How to Calculate Score, Response Sheet
Indian Institutes of Science Education and Research Entrance Exam 2026 ( IISER Entrance Exam )
IISER Aptitude Test 2026 Hall Ticket
24 May '26 - 7 Jun '26
The IISER answer key 2026 date is June 7, 2026. The answer key of IAT 2026 will be released online at iiseradmission.in. The correct answers to the questions asked in the IISER entrance exam will be mentioned in the answer key pdf. Candidates can use the IAT answer key 2026 to cross-check their responses and calculate probable marks. The response sheet will be released online along with the answer key. The IISER response sheet will be available in the candidates' login. Students can also challenge the answer key if there is any error with the options. IISER Berhampur will conduct the IAT 2026 exam on June 7, 2026.
Candidates can know their final scores after the declaration of the IISER result 2026. Check the page for the IISER answer key, the process to download and raise objections.
- How to download the IISER Answer Key 2026?
- IISER 2026 Important Dates Table
- IAT 2026 Answer Key Objection Process
- How to Calculate IISER Exam Marks
- IISER 2026 Marks vs Rank
- IISER Previous Year Official Answer Key PDFs
- IISER 2026 Cutoff
- IISER Previous Year Answer Key
How to download the IISER Answer Key 2026?
The authority will upload the IISER answer key pdf online. Candidates can download the IAT answer key 2026 through the online application portal. The answer key will be available along with the candidate's digital response. The process to download the IISER 2026 answer key is mentioned below.
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Go to the IISER official website, iiseradmission.in/
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Click on the ‘IISER answer key” link.
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Enter application number (roll number) and password.
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The answer key of IISER was displayed on the screen.
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Take a print out of the answer key and save it for future reference.
Commonly asked questions
Candidates will be able to download the answer key PDF of the IISER entrance exam from the exam website. Authorities releases the provisional answer keys and response sheets first, based on which candidates can check the correct answers and calculate probable scores secured in IISER Aptitude test. To download the IISER answer key, candidates can follow the process given below.
Go to IISER website - https://iiseradmission.in/
Click on ‘IISER answer key” link.
Enter application number and password.
Answer key of IISER was displayed on screen.
Take a print out of answer key and save it for future reference
Indian Institutes of Science Education and Research (IISER) will release the IISER Aptitude Test (IAT) 2026 Student Response Sheet in the second week of June 2026. Candidates can visit the official website of IISER and, after logging in with their credentials, can finally view their IAT 2026 Response Sheet. Candidates can finally tally up their marks scored in the IISER Aptitude Test.
IISER is expected to release the IAT 2026 Answer Key in the fourth week of May. Candidates who will appear in the IISER Aptitude Test will be able to check their answers marked for the questions asked and can evaluate their final marks scored. Test takers will get the opportunity to raise objections against the provisional answer keys, in case there is a discrepancy.
IISER 2026 Important Dates Table
Take a look at the table below for the complete schedule of IISER Entrance Exam 2026 exam
| Dates | Upcoming Exam Dates |
|---|---|
| 07 Jun ' 26 - 09 Jun ' 26 | Provisional Answer Key |
| 09 Jun ' 26 - 13 Jun ' 26 | Objection |
IAT 2026 Answer Key Objection Process
IISER answer key objection window will open on June 9, 2026. Candidates have to login through online application portal of IAT and submit their challenge (if applicable). This is a chargeable process and candidates have to pay for each object. They have to pay INR 100 per objections. The process to challenge the IISER answer key is mentioned below.
- Go to IISER 2026 admission website
- Click on IAT answer key objection link
- Now click on the 'Candidates response and objection portal' link
- Click on the login link.
- Enter the user id and password.
- Click on Objection form.
- The form will open. Now students have to click on fill the form link.
- Fill all sections and submit it.
- After submission, students need to pay the objection fees.
How to Calculate IISER Exam Marks
Candidates will have to calculate their estimated scores based on the following method:
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For each correct answer, add four marks
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For each wrong answer, deduct one mark
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No marks will be awarded for unattempted questions
IISER 2026 Marks vs Rank
Candidates can check IISER marks vs rank to know their rank based on marks obtained in the exam. The higher the marks, the higher the rank. Students must try to score 150+ marks to secure the top rank in IISER. Here we have mentioned the expected IISER marks vs rank.
| IISER 2026 Score (Out of 240) | Expected IISER 2026 Rank |
|---|---|
| 200 and above | Rank 1 to 80 |
| 200-160 | Rank 81- 200 |
| 160- 110 | Rank 201 to 800 |
| 110-95 | Rank 800 to 1500 |
| 95-75 | Rank 1500- 2000 |
| < 60 | Above 2000 |
Also Read: IISER 2026 Marks vs Rank
Commonly asked questions
The IISER Entrance Exam 2026 answer key objection submission process is expected to begin in the fourth week of May 2026. The last date is likely to be scheduled in the first week of June 2026. Based on the objections received, the IISER Expert Committee will review the provisional answer keys and release the final answer keys and result, tentatively by the second week of June 2026.
The IISER entrance exam result will be available on iiseradmission.in. The result will be announced in the form of a scorecard or a rank card in PDF format. It will carry subject-wise and overall scores and ranks. The IISER Entrance Exam result will be out tentatively by the fourth week of June 2026. The result should be preserved till the counselling process is over. The scorecards will not be sent through mail.
Science exams you must check out
Exams whose cutoff has been released
IISER Previous Year Official Answer Key PDFs
Answer Key: 07 Jun ' 26 - 09 Jun ' 26
Candidates can find the link to the IISER previous year answer key pdf here. The answer key is available with the IISER question paper. Students solving the previous year's questions can use the answer key to cross-check their responses and focus on weaker topics.
Download IAT 2025 Final Question Paper and Answer Key Here: Download Links
- English: Download Now
- Hindi: Download Now
Download IAT 2025 Question Paper and Provisional Answer Key Here:
- English: Download Now
- Hindi: Download Now
Also Read: IISER 2026 Question Paper Analysis
Commonly asked questions
Candidates need to enter application number and password/date of birth as login details to check your IAT result. Other than this security question or captcha that is provided on login page. If you have forgotten your application number then you will need your registered mobile number and email to retrieve application number.
Candidates will be able to download the answer key PDF of the IISER entrance exam from the exam website. Authorities releases the provisional answer keys and response sheets first, based on which candidates can check the correct answers and calculate probable scores secured in IISER Aptitude test. To download the IISER answer key, candidates can follow the process given below.
Go to IISER website - https://iiseradmission.in/
Click on ‘IISER answer key” link.
Enter application number and password.
Answer key of IISER was displayed on screen.
Take a print out of answer key and save it for future reference
The IISER entrance exam result will be available on iiseradmission.in. The result will be announced in the form of a scorecard or a rank card in PDF format. It will carry subject-wise and overall scores and ranks. The IISER Entrance Exam result will be out tentatively by the fourth week of June 2026. The result should be preserved till the counselling process is over. The scorecards will not be sent through mail.
IISER 2026 Cutoff
IISER cutoff 2026 will be released online. The cutoff is the minimum rank required for admission to the participating IISER. Students whose rank in IISER is within the closing cutoff will be considered for admission. IISER cutoff 2026 will vary for each category. The authority will consider various factors, like exam difficulty level, number of students qualified in the test, and total number of seats available, to prepare the cutoff rank.
Also Read: IISER Counselling 2026
IISER Previous Year Answer Key
IISER Entrance Exam 2023 Final answer key was released by the conducting body on June 28, 2023. IAT 2023 final answer key was the same as of IISER Provisional answer key. The only difference that the candidate will find in the IAT 2023 answer key is the solution to the Question No 14 of Chemistry subject.
For better understanding, candidates can view the question and the answer also which is specified in the final answer key. The rest of the answers are the same as of provisional answer key.
Question 14
In two solutions X (hexane and benzene) and Y (water and HCl), what types of deviations from Raoult’s law are observed?
(a) CORRECT ANSWER No deviation (ideal behaviour) and negative deviation, respectively.
(b) Negative deviation and positive deviation, respectively.
(c) CORRECT ANSWER Positive deviation and negative deviation, respectively.
(d) Positive deviation and no deviation (ideal behaviour), respectively.
Indian Institutes of Science Education and Research (IISER), the examination conducting body released the IISER Aptitude Test (IAT) 2023 Student Response Sheet on June 20, 2023. Candidates could visit the official website of IISER and after logging in with their credentials can finally view their IAT 2023 Response Sheet.
IISER candidates can download the provisonal answer key in both the hindi and english languages separately here:
IISER Entrance Exam Exam
Student Forum
Anything you would want to ask experts?Answered a week ago
Students can create an IISER login id and password during registration. The details required to register for IISER are Name, Date of birth, gender, citizenship status, mobile number, and email address.
V
Contributor-Level 10
Answered a week ago
No, IISER registration was over on April 13, 2026. Students were able to register for IAT 2026 from March 5 to April 13.
V
Contributor-Level 10
Answered a week ago
IAT user id is (application number / registration number). It is created during the IISER registration process. After the registration is over, user id and password are sent to the registered email address and mobile number.
V
Contributor-Level 10
Answered 2 months ago
IISER answer key will be released on June 7, 2026. Candidates can download the answer key online. The answer key challenge window will open on June 9, 2026.
V
Contributor-Level 10
Answered 2 months ago
The IISER exam date is June 7, 2026. The exam will commence at 9 AM and continue till 12 PM. It is a computer-based test.
V
Contributor-Level 10
Answered 2 months ago
IISER score 200 or above is a good marks. It can help to get admission to IISER Pune and IISc Bangalore. Candidates must have a good conceptual knowledge, give priority to all four subjects. Prepare for the exam according to the exam syllabus and take mock test to score above 200.
V
Contributor-Level 10
Answered 2 months ago
Based on previous year analysis, IAT exam is moderately difficult. It requires strong conceptual knowledge. Students who have prepared properly for exam can easily score good marks.
V
Contributor-Level 10
Answered 2 months ago
It is quite difficult for the GEN / OBC category to get admission to IISER with 50 marks. Even the reserved category students have less chance in the later counelling round for admission. To secure admission, students must score above 150 marks.
V
Contributor-Level 10
Answered 2 months ago
IISER exam is considered of moderate difficulty level. Majority of students finds Physics, and Mathematics challenging. PCM students may find biology tough while PCB students might find Mathematics tough. However, the difficulty level of IISER compared to JEE Main and Advanced is moderate to easy.
V
Contributor-Level 10
Answered 2 months ago
The last date to apply for IISER 2026 was April 13, 2026. IAT application form was available on the website, iiseradmission.in.
V
Contributor-Level 10
11 Institutes accepting IISER Entrance Exam
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4.2- ₹ 4.45 Lakh
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How to create IISER login ID and Password?