The Indian Institute of Science Education and Research (IISER) announced the IISER IAT 2026 response sheet on 09/06/2026. Candidates who took the Aptitude Test on 07/06/2026 can now view their marked answers directly on the official portal at iiseradmission.in. The objection window to challenge any discrepancies in the provisional answer key remains open until 13/06/2026.
Your response sheet serves as a digital copy of all options you selected during the exam, making it essential for calculating your probable score before results are declared.
Overview
| Particulars | Details |
|---|---|
| Examination Name | IISER Aptitude Test (IAT) 2026 |
| Response Sheet Status | Released on 09/06/2026 |
| Official Website | https://iiseradmission.in |
| Exam Date | 07/06/2026 |
| Objection Submission Window | 09/06/2026 to 13/06/2026 (11:59 PM) |
| Final Answer Key Release | Fourth Week of June 2026 |
Key Information
| Particulars | Details |
|---|---|
| Exam Name | IISER Aptitude Test (IAT) 2026 |
| Response Sheet Release Date | 09/06/2026 |
| Exam Conducted On | 07/06/2026 |
| Objection Fee Per Question | ₹100 (Non-refundable) |
| IAT 2026 Result Date | First Week of July 2026 |
| Total Marks in IAT | 240 Marks |
What Is the IISER IAT 2026 Response Sheet?
The IAT 2026 response sheet documents every answer you submitted during the online test. It allows you to immediately evaluate your performance by comparing your choices with the provisional answer key. If you find a disputed answer, you can use the response sheet data to back your formal objections.
It contains essential exam data such as your application number, roll number, test shift, question IDs across Physics, Chemistry, Mathematics, and Biology, along with the exact options you chose.
Details Available in IISER IAT 2026 Response Sheet
| Information Provided | Description |
|---|---|
| Candidate Name | Full name as registered |
| Application Number | Unique registration identification |
| Roll Number | Exam roll number |
| Exam Date & Shift | Date and shift of your session |
| Question IDs | Unique codes for each question |
| Option Selected | Your chosen answer (A, B, C, or D) |
| Subject Classification | Sections attempted |
| Question Sequence | Sequential numbering of questions |
| Paper Set Information | Specific question paper variant |
IISER IAT 2026 Marking Scheme: Calculate Your Probable Score
Use the official marking scheme below to estimate your score out of 240 marks:
| Response Type | Marks Awarded |
|---|---|
| Correct Answer | +4 Marks |
| Incorrect Answer | -1 Mark |
| Unattempted Question | 0 Marks |
To calculate your probable score, compare your downloaded response sheet to the official answer key. Multiply your total correct answers by 4, and your total incorrect answers by 1. Subtract the incorrect penalty from your correct total.
For instance, if you got 180 questions right and 20 wrong: (180 × 4) – (20 × 1) = 720 – 20 = 700 marks.
How to Download IISER IAT 2026 Response Sheet
Access your individual response sheet by clicking the direct official portal link provided below and logging in with your application credentials.
IISER IAT 2026 Answer Key Objection Process
If you detect an error in the provisional key, you can file a formal challenge. Click the objection link on your candidate dashboard at iiseradmission.in, select the specific question IDs, upload your supporting evidence, and pay the ₹100 non-refundable fee per question before 13/06/2026 (11:59 PM).
IISER IAT 2026 Important Dates Timeline
| Event | Date |
|---|---|
| IAT 2026 Exam Conducted | 07/06/2026 |
| Provisional Answer Key Released | 07/06/2026 |
| Response Sheet Release | 09/06/2026 |
| Objection Submission Window Opens | 09/06/2026 |
| Objection Submission Deadline | 13/06/2026 (11:59 PM) |
| Final Answer Key Release | Fourth Week of June 2026 |
| IAT 2026 Result Declaration | First Week of July 2026 |
IISER IAT 2026 Score to Percentile Estimation Reference
| Score (Out of 240 Marks) | Estimated Percentile |
|---|---|
| 210 Marks and Above | 99.9 Percentile |
| 195 Marks | 99.8 Percentile |
| 185 Marks | 99.7 Percentile |
| 170 Marks | 99.4 Percentile |
| 155 Marks | 98.9 Percentile |
| 140 Marks | 98.3 Percentile |
| 125 Marks | 97.5 Percentile |
| 110 Marks | 96.0 Percentile |
| Below 100 Marks | 95.0 Percentile |
These percentile ranges are historical estimates. Final percentiles will be calculated by IISER based on this year’s test-taker data.
Additional Information
Once the objection window closes, a committee will review all submissions. Any valid objections will lead to updates in the final answer key, scheduled for release in the fourth week of June 2026. The final IAT 2026 results and counseling merit lists will follow in the first week of July 2026.
Important Links
| Particulars | Link |
|---|---|
| IAT 2026 Response Sheet Download Portal | Click Here |
| Official IISER Admission Website | Click Here |
Frequently Asked Questions (FAQs)
Q1. What exactly is the IISER IAT 2026 response sheet?
Ans. It is an official digital copy showing every answer you picked during your IAT exam. You use it to cross-check your choices against the provisional answer key to figure out your probable score.
Q2. Where do I go to download my response sheet?
Ans. Head to iiseradmission.in and log into your candidate dashboard. From there, you can view and download your response sheet as a PDF.
Q3. Until when can I raise an objection against the provisional answer key?
Ans. The objection window is open right now and will close at 11:59 PM on 13/06/2026.
Q4. How much does it cost to challenge an answer?
Ans. You have to pay a non-refundable fee of ₹100 for each question you wish to challenge.
Q5. When is the final answer key coming out?
Ans. IISER will publish the finalized answer key during the fourth week of June 2026, after they review all the student objections.
Q6. Can I challenge more than one question?
Ans. Absolutely. You can raise objections for multiple questions, but keep in mind that the ₹100 fee applies per question, and you’ll need valid supporting documents for each one.
