IISER Aptitude Test 2026 is one of the main entrance exams for students who want to make a career in science and research. This test is for admission into top Indian Institutes of Science Education and Research (IISERs), which provide BS-MS dual degree programs, BS programs, and some B.Tech courses as well. Very few seats out of a large number of aspirants are available at IISER campuses making the exam very challenging.

Interest in research-based education in India is increasing and as a result, IAT 2026 will most probably get a record number of applicants. Students who choose Physics, Chemistry, Biology, Mathematics, Data Science, and interdisciplinary research, prefer IISERs for their strong academic environment and great research exposure. Getting started early and understanding eligibility, exam pattern, and selection criteria well are must-have components to expect success in the exam.

IAT 2026 Notification Overview

The official notification for IISER Aptitude Test 2026 has been released already and the application process started from 5 March 2026. Applicants who want to be admitted to IISER campuses must carry out the online registration procedure before the last date. The notification has specified 13 April 2026 (Sunday) as the final day to submit the application form.

Exams will be held in computer-based mode at many test centers in India. Students should keep themselves updated on official notices related to admit cards, exam city intimation, and counseling schedules.

The candidates who will appear for IAT 2026 should remember the some of the important dates are:

Event	Date
Application Start	5 March 2026
Application End	13 April 2026 (Sunday)
Exam Date	7 June 2026 (9:00 AM – 12:00 Noon)

IAT 2026 exam will be held in the form of a single paper for three hours in computer-based mode in various test centres across India. Candidates are advised to download their admit cards much earlier and check all their personal and centre-related information carefully before the examination day.

What is the IISER Aptitude Test 2026?

IISER Aptitude Test 2026 is the major entrance exam for admission into various IISERs in different parts of India. IISERs are institutes of national importance that are run autonomously to provide top quality education and research in science.

It tests the conceptual understanding and skills of the candidates in Physics, Chemistry, Mathematics and Biology. Many engineering entrance exams are more focused on engineering but IAT 2026 is quite different as it tests the scientific reasoning and research aptitude of the candidates. That is why the test is a perfect fit for those students who love the world of science and want to create something new.

The institutions through which one can get admission through these exams are IISER Pune, IISER Kolkata, IISER Mohali, IISER Bhopal, IISER Thiruvananthapuram, IISER Tirupati, IISER Berhampur and some other campuses. Many of the alumni from IISER – graduate and PhD holders – have made their mark in the global academic and research community.

IAT 2026 Exam Pattern

Knowing the pattern of the exam is very essential for the candidates who are getting ready for IISER Aptitude Test 2026. The exam tests the conceptual knowledge, analytical abilities, and scientific aptitude of students rather than their ability to memorize. The students must prepare themselves equally for all the four subjects of science in order to achieve top ​‍​‌‍​‍‌​‍​‌‍​‍‌scores.

IAT 2026 Exam Pattern Overview

Particulars	Details
Exam Name	IISER Aptitude Test (IAT) 2026
Exam Mode	Computer-Based Test (Online)
Duration	3 Hours
Question Type	Multiple Choice Questions (MCQs)
Subjects Covered	Physics, Chemistry, Mathematics, Biology
Difficulty Level	Moderate to Advanced
Focus Area	Conceptual Understanding & Analytical Skills
Exam Timing	9:00 AM – 12:00 Noon
Language	English

The​‍​‌‍​‍‌​‍​‌‍​‍‌ examination paper typically comprises application-based and concept-oriented questions from the Science syllabus of Class 11 and Class 12. Since the paper will measure scientific reasoning and interdisciplinary understanding, students are advised to primarily focus on conceptual clarity and regular problem-solving practice.

IAT 2026 Syllabus

The IISER Aptitude Test 2026 syllabus mainly covers the NCERT curriculum of Classes 11 and 12. Besides revisiting all four science subjects thoroughly, candidates should engage with advanced application-based questions.

Physics Syllabus

Physics mainly deals with a conceptual grasp of ideas and numerical problem-solving.

Important Topics

• Laws of Motion
• Work, Energy and Power
• Rotational Motion
• Gravitation
• Thermodynamics
• Oscillations and Waves
• Electrostatics
• Current Electricity
• Magnetism
• Electromagnetic Induction
• Optics
• Modern Physics

Chemistry Syllabus

The Chemistry section includes Physical Chemistry, Organic Chemistry, and Inorganic Chemistry.

Important Topics

• Atomic Structure
• Chemical Bonding
• Thermodynamics
• Equilibrium
• Redox Reactions
• Electrochemistry
• Organic Reaction Mechanisms
• Hydrocarbons
• Coordination Compounds
• p-Block Elements
• d- and f-Block Elements
• Biomolecules

Mathematics Syllabus

The Mathematics section evaluates logical thinking and problem-solving ability.

Important Topics

• Sets and Relations
• Trigonometry
• Quadratic Equations
• Sequences and Series
• Permutation and Combination
• Probability
• Coordinate Geometry
• Limits and Continuity
• Differentiation
• Integration
• Differential Equations
• Vectors and 3D Geometry

Biology Syllabus

The Biology section is especially important for PCB students and includes questions from both Botany and Zoology.

Important Topics

• Cell Structure and Function
• Genetics and Evolution
• Human Physiology
• Plant Physiology
• Biotechnology
• Ecology and Environment
• Reproduction
• Biomolecules
• Biological Classification
• Microbes in Human Welfare

Students should prioritize NCERT textbooks while also solving previous years’ papers and advanced conceptual questions.

IAT 2026 Eligibility Criteria

Candidates must independently review the eligibility criteria of IISERs before taking the IISER Aptitude Test 2026. Missing out on a criterion can lead to the cancellation of the application even after the test.

Nationality

Indian citizens, including those holding Overseas Citizenship of India (OCI) or Person of Indian Origin (PIO), are covered under the IAT. Foreign nationals may be eligible under separate quotas as per IISER rules.

Age Limit

According to IISER’s directives, there is no upper age limit set for candidates who wish to appear for the IISER Aptitude Test 2026. Nonetheless, candidates must have either cleared the Class 12 examination or be appearing for it in that academic year.

Educational Qualification

Criterion	Requirement
Minimum Qualification	Class 12 (or equivalent) passed or appearing
Required Subjects	Physics, Chemistry, and Mathematics or Biology
Minimum Marks (General/OBC)	60% aggregate in PCM or PCB
Minimum Marks (SC/ST/PwD)	55% aggregate in PCM or PCB
Board Recognition	Any recognised central or state board

It must also be mentioned that students who will be taking their Class 12 board exams in 2026 can also apply for IAT if they fulfill the subject and marks criteria on the declaration of results.

IAT 2026 Seats and Campus Distribution

Getting a hold of the number of seats available in various IISER campuses through the IAT channel is crucial to your IAT 2026 preparation. Roughly, 2,343 seats are available in these centers along with the seats through KVPY (now INSPIRE) and Olympiad channels. Besides the BS-MS dual degree program, other programs offered are the BS and B.Tech (only in some IISERs).

Below given is a tentative seat distribution across ​‍​‌‍​‍‌​‍​‌‍​‍‌campuses:

IISER Campus	Approximate Seats
IISER Pune	~350
IISER Kolkata	~300
IISER Mohali	~300
IISER Bhopal	~300
IISER Thiruvananthapuram	~300
IISER Tirupati	~250
IISER Berhampur	~250
IISER (others – Ropar, Palakkad, etc.)	~300
Total	~2,343

These​‍​‌‍​‍‌​‍​‌‍​‍‌ figures can only be considered as reference and they might differ from the numbers officially published by the individual IISERs. Rules for reservations as per Government of India regulations — including reservation for SC, ST, OBC (Non-Creamy Layer), EWS, and PwD categories — remain valid for all campuses.

IAT 2026 Selection Process

Admission to IAT 2026 is conducted through a clear, merit-based and multi-step selection process. An aspirant needs to understand each of these steps well to plan their study and application appropriately. Admission to IAT 2026 is conducted through a clear, merit-based and multi-step selection process. An aspirant needs to understand each of these steps well to plan their study and application appropriately.

Step 1 — Online Application: The candidate has to first create an account on the official IAT website and then submit the required personal and educational details. They must also upload the necessary documents and pay the necessary fee for the application before 13 April 2026.

Step 2 — Take the IAT Exam: IAT 2026 will be a single, multiple-choice question paper covering four subjects – Physics, Chemistry, Mathematics, and Biology. It is meant to assess students’ understanding, logical thinking, and problem-solving abilities rather than memorization.

Step 3 — Merit List Preparation: A common merit list is prepared based on the marks scored in the IAT examination. The merit is solely decided by the total score of a candidate. However, separate merit lists for SC, ST, OBC, etc., categories are also published.

Step 4 — Counseling and Seat Allocation: Only the candidates who obtain qualifying marks are invited to participate in the counseling session which will be held online. During this session, the candidates get to decide the IISER campus and program they wish to pursue. The seats are allotted purely based on merit and availability of seats.

It must be emphasized that only 1 to 2% of test takers out of every hundred are fortunate enough to get through the IAT channel, which highlights the tremendous level of competition of this exam.

Competition Analysis: How Tough Is IAT 2026?

The increasing recognition of IISERs as top-notch science institutions is one of the reasons for a huge increase in the number of students taking the IAT each year. Estimates show that around 71,000 students took the exam in 2024. This number rose to somewhere between 70,000 and 1.2 lakh in 2025, while the estimates for IAT 2026 indicate that the candidate pool could reach 1.3–1.5 lakh.

When the number of seats is taken into consideration, that is around 2,300–2,400, the selection rate would be approximately 1% to 2%. In consequence, a student who appeared for the IISER Aptitude Test is likely to get an offer of admission through the IAT channel in less than two cases out of one hundred. What makes the examination difficult is that it draws the top students of CBSE, ICSE, and state boards, and many of these students are simultaneously preparing for JEE Advanced and NEET.

Under the circumstances, the aspirants must be well aware of the competition, and they must go along with a proper, step-by-step preparation plan. Going for last-minute revisions or coaching just for JEE or NEET will not help. IAT demands a thorough understanding of interdisciplinary science topics, effective analytical skills, and ample practice with previous years’ ​‍​‌‍​‍‌​‍​‌‍​‍‌papers.

Career Opportunities and Research Scope After IISERs

Admission through IAT 2026 and the successful completion of a degree from an IISER is much more than just an academic accomplishment — it marks the start of a global scientific career at the highest level.

IISER graduates are among the most desired applicants for doctoral programs at leading research institutions in India such as the Indian Institute of Science (IISc), Bengaluru, the Tata Institute of Fundamental Research (TIFR), as well as prominent international universities in the United States, Europe, and Asia.

The BS-MS degree, which usually takes five years to complete, features a perfect blend of intense coursework combined with research-based learning even from the initial year.

Alumni pursue a variety of careers such as teaching and research in universities, working in Government R&D laboratories, doing data science and quantitative analysis, helping in biotechnology and pharmaceutical research, and supporting science policy development.

Besides these, the interdisciplinary training received at IISERs gives the graduates a really good chance for employment in the private sector especially in technology-related industries.

Commencing preparation early and receiving good guidance are the most important factors for cracking IAT. Students of 9th and 10th who build strong scientific and mathematical concept bases will be really ahead when it comes to the IAT exam.

Besides finding focused and frequent mentoring, one can also choose Foundation Coaching in Paschim Vihar and other established centers to get a well-organized curriculum, regular tests, and expert guidance perfectly suited for competitive science exams.

Besides preparing for IAT 2026, students should use the opportunity of International Science Olympiads to enhance their academic knowledge and get additional exposure. For example, the top candidates from the International Biology Olympiad (IBO), 2026 may benefit academically as well as they may get an alternate vacation to IISERs of their choice other than the IAT route.

Conclusion

The IISER Aptitude Test 2026 will be one of the most highly desired and toughest science entrance exams in India.

With the opening for applications on 5 March 2026 and the last date of submission on 13 April 2026, and the exam date being on 7 June 2026, candidates need to be punctual and plan their preparation smartly.

About 2,343 seats across all IISER campuses are available but the competition is so high that only 1-2% of those applying will get selected in IAT 2026. Achieving the goal requires regular studying, thorough understanding, and a preparation schedule that should preferably be started long before the exam.

Students and their parents should keep checking the official IAT and IISER websites for information on admit cards, exam centers, result announcements, and the schedule for counseling.

Going to an IISER is challenging — but for those who get there, the benefits in terms of research excellence, global opportunities, and influence on science are unmatched. Begin now, keep your eyes on the goal, and make it to IAT 2026.

Frequently Asked Questions (FAQs)