What is the IISER Aptitude Test (IAT)?
The Indian Institutes of Science Education and Research (IISERs) are the hallmark of scientific inquiry in India. The **IISER Aptitude Test (IAT)** is the primary gateway for students aiming to enter the five-year BS-MS dual degree and four-year BS degree programs. Held annually, this computer-based test evaluates candidates across Physics, Chemistry, Mathematics, and Biology, determining their future at campuses in Berhampur, Bhopal, Kolkata, Mohali, Pune, Thiruvananthapuram, and Tirupati.
IISER 2026 Exam Highlights
| Exam Name | IISER Aptitude Test (IAT) |
| Conducting Body | IISER Joint Admissions Committee |
| Exam Mode | Online / Computer-Based Test (CBT) |
| Total Marks | 240 Marks |
| Total Questions | 60 (15 each in PCMB) |
| Marking Scheme | +4 for Correct, -1 for Incorrect |
| Duration | 3 Hours |
| Official Website | iiseradmission.in |
Key Dates (Tentative)
Application Starts
Second week of March 2026
Application Ends
Second week of April 2026
Admit Card Release
Second week of May 2026
IAT 2026 Exam Date
Third week of May 2026
Participating Institutes & Seat Intake
Beyond the core IISER campuses, top-tier institutes like **IISc Bangalore** and **IIT Madras** also accept IAT scores for specific BS programs.
Total Estimated Seats: 2,333+
With the addition of new interdisciplinary courses, the intake for 2026 is expected to be the highest ever.
Eligibility Checklist
- Indian Citizens, PIO, or OCI candidates.
- Passed Class 12 in 2024 or 2026 with Science stream.
- Studied at least 3 subjects among Biology, Chemistry, Maths, and Physics.
- Minimum 60% aggregate (55% for SC/ST/PwD) in Class 12.
IAT 2026 Exam Pattern
Physics
15 Qs
60 Marks
Chemistry
15 Qs
60 Marks
Biology
15 Qs
60 Marks
Maths
15 Qs
60 Marks