IISER exam pattern 2026 will be updated by the exam officials every year upon the release of the information brochure. Based on the previous year’s trends, the IAT Exam Pattern 2026 remains the same, and the frequency of pattern change is low.
Based on the IISER 2026 exam pattern, the exam will be conducted in CBT/online mode for the duration of three hours in only one shift. There will be 60 multiple-choice questions (MCQs) that the exam officials will ask in the exam from the Chemistry, Biology, Physics and Mathematics Subjects.
Before starting the preparation, candidates must know the exam pattern and IISER 2026 syllabus, which will help them know the types of questions, exam difficulty, and depth of the subjects in detail.
Check out the IAT 2026 negative marking scheme, exam pattern, subject subject-wise question division on this SciAstra exam page.
Table of Contents
IAT 2026 Exam Pattern
Check out the IISER entrance exam pattern 2026 from below:
| Features | Details |
|---|---|
| Mode of Exam | Online/ CBT |
| Medium of Exam | Bilingual |
| Frequency of Exam | Once in a year |
| Number of Sections | 4 |
| Number of Questions | 60 Questions |
| Types of Questions | Multiple Choice Questions (MCQ) |
| Total Marks | 240 Marks |
| Marking Scheme | +4 for correct answer and -1 for incorrect answers |
IAT 2026 Exam Dates
Since IAT 2026 admission dates are yet to be announced by the exam officials, candidates can check out the previous year’s dates from here for reference:
| IISER Entrance Exam Dates 2026 | Event Date (Tentative) |
|---|---|
| IISER 2026 Exam Notification | Jan 25, 2026 – Jan 31, 2026 |
| IISER Exam 2026 Registration Date | March 10, 2026 to April 15, 2026 |
| IISER Admit Card 2026 | May 15, 2026 |
| IISER Exam 2026 | May 25, 2026 |
| IISER Provisional Answer Key 2026 | May 25, 2026 |
| IISER Exam Student Response Sheet 2026 | May 29, 2026 |
| IISER Final Answer Key 2026 | June 24, 2026 |
| IISER Result 2026 | June 24, 2026 |
IISER Marking Scheme
| Subject | No of Questions | Correct Answer | Incorrect Answer |
|---|---|---|---|
| Physics | 15 | +4 | -1 |
| Chemistry | 15 | +4 | -1 |
| Mathematics | 15 | +4 | -1 |
| Biology | 15 | +4 | -1 |
