IISER After 12th: The IAT Exam Explained

The IISER Aptitude Test (IAT) is the joint entrance exam for the 5-year BS-MS Dual Degree programs at India's seven IISERs — a premier destination for students who love pure science.

7 IISER campuses 5-year BS-MS National level exam

Institutes & Programs

IISER Pune, Kolkata, Mohali, Bhopal, Thiruvananthapuram, Tirupati, and Berhampur — offering the 5-year BS-MS Dual Degree, plus a 4-year BS and B.Tech at select campuses, across Natural Sciences, Engineering, Computational & Data Sciences, and Economic Sciences.

Eligibility

Passed Class XII (science stream) in the current year or previous 2 years, from a COBSE-recognized board
At least 3 subjects among Biology, Chemistry, Mathematics, and Physics
Minimum aggregate: 60% (General), 55% (SC/ST/PwD)

Exam Pattern

Computer-based, single-correct MCQs, 3 hours, 240 total marks — 15 questions (60 marks) each in Biology, Chemistry, Mathematics, and Physics.

Response	Marks
Correct	+4
Wrong	−1
Unanswered	0

Seats & Why IISER

Over 2,100 seats across the BS-MS program in 2025. IISERs combine integrated undergraduate teaching with cutting-edge research from day one, plus research internships that can lead into an MS thesis.

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Information compiled for general guidance. Always verify exam dates, fees, and eligibility on the official website before applying.