The Indian Institutes of Science Education and Research (IISERs) have officially released the Information Brochure for the highly anticipated IISER Aptitude Test (IAT) 2026. Established by the Government of India, the IISERs at Berhampur, Bhopal, Kolkata, Mohali, Pune, Thiruvananthapuram, and Tirupati represent the pinnacle of interdisciplinary science education and research in the country. For the Academic Year 2026-2027, admission to the prestigious 5-Year BS-MS (Dual Degree), 4-Year BS, and 4-Year B.Tech Degree programs will be conducted exclusively through the IAT 2026.
In 2026, the competition level for IISER Admissions is expected to break all previous records. Not only are candidates vying for the 2343 seats across the seven IISER campuses , but the IAT 2026 Rank List will also be utilized by other premier institutions, including IISc Bengaluru, IIT Madras, and IIT Guwahati, for their respective BS programs. This makes IAT 2026 one of the most critical entrance examinations for science and engineering aspirants nationwide. The examination is scheduled for June 7, 2026, in a Computer-Based Test (CBT) mode across India. This comprehensive guide meticulously decodes the official notification, detailing the strict eligibility criteria, the unique +4/-1 marking scheme, the Seat Acceptance Fee structure, and the step-by-step application process to ensure your form is not summarily rejected.
IISER Admissions 2026 Quick Highlights
| Authority | Indian Institutes of Science Education and Research (IISER) |
| Exam Name | IISER Aptitude Test (IAT) 2026 |
| Organizing Institute | IISER Berhampur |
| Courses Offered | 5-Year BS-MS (Dual Degree), 4-Year BS, 4-Year B.Tech |
| Total Seats (Vacancy) | 2343 Seats |
| Exam Date | June 7, 2026 (Sunday) at 9:00 AM IST |
| Official Website | www.iiseradmission.in |
Important Dates & Full Schedule
Timing is critical for national-level entrance exams. The Joint Admissions Committee (JAC) 2026 strictly enforces its deadlines, and no requests for deadline extensions will be entertained. Candidates are strongly advised to apply well before the portal closes to avoid last-minute server bottlenecks.
- Online Application Portal Opens: March 5, 2026 (Thursday)
- Online Application Closes: April 13, 2026 (Monday)
- Application Correction Window: April 16 to April 18, 2026
- Release of Hall Ticket: May 24, 2026
- IISER Aptitude Test (IAT) Date: June 7, 2026
- Answer Key Display & Objections Window: June 9 to June 13, 2026
- Last Date for Document Upload: June 21, 2026
Eligibility Criteria (The Technical Deep-Dive)
The document verification stage during the counseling process is incredibly strict. Clearing the CBT exam is useless if you fail to meet the absolute educational parameters set by the authorities.
Educational Qualification:
- Candidates must have passed the Class XII (or equivalent) examination or a Diploma of at least 3 years duration from recognized boards (COBSE/AICTE).
- Crucial Year of Passing Rule: Candidates who passed the Qualifying Examination in 2023 or earlier are NOT eligible to appear. Only those who passed (or are appearing) in 2024, 2025, or 2026 are eligible.
- Subject Requirements: Applicants must have taken at least three subjects among Biology, Chemistry, Mathematics, and Physics.
- The Mathematics Mandate: Mathematics is compulsory in Class XII for admission to B.Tech at IISER Bhopal, BS in Economic Sciences at IISER Bhopal, BS-MS in Computational and Data Sciences at IISER Kolkata, and BS in Economic and Statistical Sciences at IISER Tirupati.
- Minimum Marks: General, EWS, and OBC candidates must score a minimum of 60% marks in aggregate (considering ALL subjects). SC, ST, and PwD candidates require a minimum of 55% marks in aggregate.
Nationality: Indian nationals, Persons of Indian Origin (PIO), Overseas Citizens of India (OCI), and Foreign Nationals are eligible to apply.
AP ECET 2026 Notification PDF Apply Online for Lateral Entry Admissions
Vacancy Details & Salary Structure (Seat Matrix & ROI)
While this is an academic admission test rather than a job recruitment, the “Vacancy” here refers to the highly coveted Seat Matrix, and the “Salary Structure” translates to the immense career Return on Investment (ROI) and potential fellowships. Please note that admission to IISERs does not necessarily entitle a student to a fellowship automatically.
Total Seat Matrix (2343 Seats):
- IISER Thiruvananthapuram: 320 BS-MS Seats
- IISER Bhopal: 300 BS-MS Seats + 195 B.Tech/BS Seats
- IISER Berhampur: 300 BS-MS Seats
- IISER Pune: 288 BS-MS Seats
- IISER Kolkata: 280 BS-MS Seats + 30 CDS Seats
- IISER Mohali: 275 BS-MS Seats
- IISER Tirupati: 250 BS-MS Seats + 50 BS Seats
Reservation Policy: The Government of India mandate applies strictly: 27% for OBC-NCL, 15% for SC, 7.5% for ST, and 10% for GEN-EWS. Additionally, a 5% horizontal reservation is provided for Persons with Benchmark Disabilities (PwD).
Exam Pattern & Syllabus (The “Helpful” Guide)
Mastering the 180-minute (3 Hours) exam architecture is the key to maximizing your rank in IAT 2026. The test is completely objective (Multiple Choice Questions) with only one correct answer per question.
Analysis of the Marking Scheme & Strategy:
- Total Questions: 60 Questions (15 each from Biology, Chemistry, Mathematics, and Physics).
- Total Marks: 240 Marks.
- Marking Scheme: Candidates are awarded +4 marks for every correct answer.
- Negative Marking Alert: There is a strict penalty of -1 mark for every incorrect answer. Unanswered questions receive 0 marks.
Syllabus Highlights:
The syllabus comprehensively covers Class 11 and 12 NCERT frameworks.
- Physics: Mechanics, Thermodynamics, Electromagnetism, Optics, Dual Nature of Radiation, and Semiconductor Electronics.
- Chemistry: Physical Chemistry (Thermodynamics, Equilibrium, Electrochemistry), Inorganic Chemistry (d- & f-block, Coordination compounds), and Organic Chemistry.
- Mathematics: Calculus (Differentiation/Integration), Algebra (Matrices, Complex Numbers), Coordinate Geometry, Vectors, and Probability.
- Biology: Human Physiology, Genetics and Evolution, Ecology, Plant Physiology, and Biotechnology.
How to Apply Online (Step-by-Step with Action Verbs)
The IISER 2026 Application process is entirely digitized. Do not use any portal other than www.iiseradmission.in.
- Visit the Portal: Navigate securely to https://iiseradmission.in/.
- Register: Create your unique profile. Ensure the email and mobile number belong to you or your parents, as all communications will be sent via SMS/Email.
- Fill the Form: Accurately enter your demographic and educational details. Note that category information cannot be changed after submission, even during the correction window.
- Upload Documents: Upload your Class X and XII mark sheets. If your XII result is pending, upload the signed “Declaration in Lieu of Marksheet” (must upload actual marksheet by June 21, 2026). Upload your photo (up to 200 KB) and signature (up to 200 KB).
- Pay the Application Fee: The fee is ₹2,000/- for GEN/EWS/OBC/OBC-NCL candidates, and ₹1,000/- for SC/ST/PwD/Kashmiri Migrants. The fee is non-refundable.
- Submit and Print: Review the preview page thoroughly and submit your application.
Pro-Tip for EWS/OBC-NCL Candidates: Your category certificate MUST be issued on or after April 01, 2026. If you don’t have it while applying, upload the specific declaration form provided in the brochure annexure and upload the valid certificate before June 21, 2026.
Direct Links Section (The Core Value)
- Official IISER IAT 2026 Information Brochure PDF: Download Here
- IAT 2026 Application Link: Apply Online Here (www.iiseradmission.in)
- Official IISER Admissions Website: www.iiseradmission.in
Detailed Strategy & Expert Insights
To clear the IAT 2026 Exam in your very first attempt, you must pivot your strategy regarding the strict +4/-1 marking scheme. Since the maximum marks are 240, intelligent attempt ratios are vital. Unlike exams with no negative marking, blindly guessing questions in IAT will brutally destroy your rank.
If you are a PCM (Engineering) student, do not entirely abandon the Biology section. Often, 3 to 4 questions in Biology are basic foundational logic that can fetch you a quick 12-16 marks. The same applies to PCB (Medical) students regarding Mathematics.
Furthermore, post-exam, if you receive a seat offer, you must pay the Seat Acceptance Fee (SAF) of ₹35,000 (GEN/OBC/EWS) or ₹17,500 (SC/ST) within the tight deadline to secure it. Failing to pay the SAF instantly removes you from all subsequent rounds of counseling. Utilize the FLOAT option smartly during counseling if you wish to upgrade your seat to a higher preferred IISER in subsequent rounds.
Frequently Asked Questions (FAQ)
1. When is the IISER IAT 2026 Exam Date? The IISER Aptitude Test (IAT) 2026 will be conducted on June 7, 2026, at 9:00 AM IST.
2. Are students who passed Class 12 in 2023 eligible for IAT 2026? No. Candidates who passed the qualifying examination in 2023 or before are strictly not eligible to appear for IAT 2026.
3. Is Mathematics compulsory to apply for IISER? You can apply for standard BS-MS programs without Mathematics. However, Mathematics in Class XII is compulsory for B.Tech, BS Economic Sciences, and BS-MS Computational and Data Sciences programs.
4. What is the application fee for IAT 2026? The application fee is ₹2,000 for General, EWS, OBC, and OBC-NCL categories, and ₹1,000 for SC, ST, PwD, and Kashmiri Migrants.
5. Is there negative marking in the IISER Aptitude Test? Yes, there is a penalty of -1 mark for every incorrect answer. Correct answers are awarded +4 marks.
6. Can I apply for IIT Madras BS program using the IAT score? Yes, institutions like IIT Madras, IISc Bengaluru, IIT Guwahati, and IACS Kolkata will use the IAT 2026 scores for admission to specific BS programs. However, you must apply to those institutes separately.
7. What is the deadline to upload the Class 12 marksheet if my results are delayed? If your results are not declared by the application deadline, you must upload a signed declaration form initially, and the actual marksheet must be uploaded on or before June 21, 2026.
8. Can I change my category (e.g., General to EWS) after submitting the application? No. Once the application is submitted, category information cannot be changed under any circumstances, not even during the correction window.
9. What is the validity date required for the EWS/OBC-NCL certificate? The EWS or OBC-NCL certificate must be valid for the financial year 2026-27 and issued on or after April 01, 2026.
10. What items are allowed inside the IAT examination hall? Only your printed Hall Ticket, an original Photo ID Card, a transparent water bottle, and a ball pen are allowed inside the test hall.
HS Patel is a seasoned expert with over 8 years of experience in the field of e.g., Education & Career Counseling. With a deep understanding of industry trends and user needs, he is dedicated to providing accurate, reliable, and high-quality content. His mission is to simplify complex information and empower readers with the right knowledge to succeed.