IISER Aptitude Test

Key facts

Conducting body

Indian Institutes of Science Education and Research

Eligible class

Class-12

Exam level

National

Exam areas

Research, Science

Typical exam month

June. (The IAT 2026 was conducted on Sunday, June 7, 2026).

Academic year

2026-2027

Primary goal

To evaluate candidates for admission to premier undergraduate science programs, specifically the 5-Year BS-MS (Dual Degree) and 4-Year BS degree programs across the 7 IISERs, as well as select undergraduate programs at participating premier external institutes (IISc Bangalore, IIT Madras, IIT Guwahati, IACS Kolkata, and IIEST Shibpur).

Syllabus subjects

Biology, Chemistry, Mathematics, Physics

Exam structure

examStructureDetails: Mode of Exam: Computer-Based Test (CBT). Duration: 3 hours (180 minutes). (Compensatory time of 1 additional hour is provided to eligible PwD/PwBD candidates with a scribe). Question Type: Single-correct Multiple Choice Questions (MCQs) only. Total Questions: 60 questions. Subject-wise Distribution: 15 questions each in Physics, Chemistry, Mathematics, and Biology. Total Marks: 240 marks. Medium / Language: Bilingual (English and Hindi). negativeMarking: Correct answers are awarded +4 marks, incorrect answers receive -1 mark, and unattempted questions receive 0 marks. examSections: Section 1: Physics Syllabus Subject: Physics maxMarks: 60 questionsPresented: 15 questionsToAttempt: 15 Section 2: Chemistry Syllabus Subject: Chemistry maxMarks: 60 questionsPresented: 15 questionsToAttempt: 15 Section 3: Mathematics Syllabus Subject: Mathematics maxMarks: 60 questionsPresented: 15 questionsToAttempt: 15 Section 4: Biology Syllabus Subject: Biology maxMarks: 60 questionsPresented: 15 questionsToAttempt: 15 --