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IISER Aptitude Test (IAT) 2026 – Important Dates, Exam Details & Complete Guide

The IISER Aptitude Test (IAT) 2026 is the gateway to admission into India’s prestigious Indian Institutes of Science Education and Research (IISERs). If you aspire to build a career in scientific research, innovation, or interdisciplinary sciences, this exam is your opportunity.

This blog covers important dates, application details, exam timing, and preparation strategy for IAT 2026.

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📅 IAT 2026 – Important Dates

Here are the key dates every aspirant must remember:

• Application Portal Opens: 5 March 2026
• Application Portal Closes: 13 April 2026 (11:55 PM IST)
• Correction Window: 16 April – 18 April 2026
• Hall Ticket Release: 24 May 2026
• IISER Aptitude Test (IAT) 2026: Sunday, 7 June 2026
  🕘 9:00 AM – 12:00 Noon (IST)

👉 Students are strongly advised not to wait for the last date to apply.

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🎓 Programs Offered Through IAT 2026

Through IAT 2026, students can take admission into:

• 5-Year BS-MS Program (All IISERs)
• BS-MS in Computational & Data Sciences (IISER Kolkata)
• Major in Geology (IISER Mohali)
• Major in Environmental Sciences (IISER Mohali)
• 4-Year BS in Economic Sciences (IISER Bhopal)
• 4-Year BS in Economic & Statistical Sciences (IISER Tirupati)
• 4-Year B.Tech in Chemical Engineering (IISER Bhopal)
• 4-Year B.Tech in Electrical Engineering & Computer Science (IISER Bhopal)
• 4-Year B.Tech in Data Science & Engineering (IISER Bhopal)

These programs are designed to build strong foundations in scientific research, interdisciplinary learning, and innovation.

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🔬 Why Choose IISER?

IISERs are known for:

✔️ Research-oriented curriculum
✔️ Strong faculty & mentorship
✔️ Early research exposure
✔️ Interdisciplinary flexibility
✔️ Excellent higher education opportunities (India & abroad)

If you aim for a future in research, academia, data science, scientific innovation, or higher studies, IISER is an outstanding platform.

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📝 Exam Pattern Overview (IAT)

IAT will consist of 60 questions, 15 questions each from Biology, Chemistry, Mathematics, and Physics.

Total duration of the test will be 180 minutes. Questions will be of multiple choice type. Each question will have only one correct answer.

• Each correct answer will be awarded 4 marks.
• Each incorrect answer will lead to the deduction of 1 mark.
• Unanswered questions will be awarded 0 mark.
• Therefore, maximum marks in IAT will be 240.

The total marks obtained by a candidate out of 240 will be considered for preparing the Rank List.

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📚 Preparation Strategy for IAT 2026

1. Strengthen NCERT fundamentals (Class 11 & 12).
2. Focus on conceptual clarity.
3. Practice mixed-subject mock tests.
4. Improve speed + accuracy.
5. Revise weak areas systematically.

Students preparing for JEE or NEET can also target IAT with focused additional preparation.

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⚠️ Important Advice

• Apply early.
• Keep documents ready.
• Track official notifications.
• Start revision at least 3–4 months before the exam.

Remember: IAT rewards conceptual clarity and scientific thinking.

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🎯 Final Words

IAT 2026 is more than just an entrance exam — it is an entry into India’s premier research ecosystem.

If you are passionate about science and want to build a career beyond conventional engineering or medical paths, IISER can be your perfect destination.

Start preparing today.
Your research journey begins with IAT 2026.