IISER 2027: IAT Exam Dates, Eligibility, Cutoff, Counselling and Rank Predictor

IISER 2027 refers to the undergraduate admission process conducted by the seven Indian Institutes of Science Education and Research (IISERs) through the IISER Aptitude Test (IAT 2027). The IISERs are premier science institutes set up by the Ministry of Education, Government of India, offering the 5-year BS-MS Dual Degree and select BTech programmes in the pure and applied sciences. As of October 2026, the official IISER 2027 notification is yet to be released, and all key dates for the 2027 admission cycle are expected from February 2027 onwards based on the 2026 pattern.

• Notification: IISER IAT 2027 official notification is expected in February 2027. In 2026, the notification was released in February and registration opened on March 5, 2026, for about 2,338 undergraduate seats across the seven IISERs.
• Registration: IAT 2027 application window is expected to open in the first week of March 2027 and close in mid-April 2027. In 2026, the registration window ran from March 5 to April 13, 2026 — a window of about 39 days.
• Exam Date: IAT 2027 is expected to be held in the first week of June 2027. In 2026, the exam was held on June 7, 2026 as a 3-hour Computer-Based Test (CBT) with 60 questions for 240 marks.
• Result: IAT 2027 result is expected in the last week of June 2027. In 2026, results were declared on June 29, 2026, and counselling registration began from July 2, 2026, with candidates required to register by July 9, 2026.

What is IISER 2027?

The Indian Institutes of Science Education and Research (IISERs) are a group of seven autonomous institutes established by the Ministry of Education (MoE), Government of India. The first IISERs were set up in 2006 at Pune, Kolkata, and Mohali. Today, there are seven IISERs — located in Berhampur, Bhopal, Kolkata, Mohali, Pune, Thiruvananthapuram, and Tirupati. These institutes focus exclusively on science education and research, combining world-class teaching at the undergraduate and postgraduate levels with active research programmes.

The IISER Aptitude Test (IAT) is the centralized entrance exam for admission to all seven IISERs. Since 2024, the IAT is the only admission channel — the earlier KVPY-based and JEE Advanced-based channels have been discontinued. The exam is conducted by the Joint Admission Committee of IISERs (JAC-IISER), and the official portal for the entire admission process is iiseradmission.in.

Courses Offered at IISERs

The flagship programme at all seven IISERs is the 5-year BS-MS Dual Degree. Students complete a Bachelor of Science (BS) in the first three years and an integrated Master of Science (MS) in years four and five. The major disciplines available include Biology, Chemistry, Earth and Climate Science, Mathematics, and Physics.

In addition to the BS-MS, a few IISERs also offer other programmes:

• 4-year BTech (Chemical Engineering) — IISER Bhopal
• 4-year BTech (Data Science and Engineering) — IISER Bhopal
• 4-year BS (Economic Science) — IISER Bhopal
• 4-year BS (Economic and Statistical Sciences) — IISER Tirupati

Other Institutes Accepting IAT Score

Apart from the seven IISERs, IAT 2027 scores are also expected to be accepted at a few other science institutes. In 2026, the following institutions also used IAT scores for admission:

• Indian Institute of Science (IISc), Bangalore — BS (Research) programme
• Indian Association for the Cultivation of Science (IACS), Kolkata — Integrated MS programme
• Indian Institute of Engineering Science and Technology (IIEST), Shibpur — select programmes
• IIT Madras — 4-year BS programmes

The total number of seats available through IAT 2026 was about 2,338 across the seven IISERs. The seat matrix for IAT 2027 will be confirmed in the official brochure, expected in February 2027.

IISER 2027 Important Dates

The official dates for IISER IAT 2027 are yet to be announced. The expected timeline below is based on the 2026 admission cycle. You should check iiseradmission.in from February 2027 for the official brochure and confirmed dates.

All dates for IAT 2027 are tentative and based on the 2026 admission cycle. Official dates will be released with the brochure on iiseradmission.in in early 2027.

Source: iiseradmission.in — Official IISER Admission Portal

IISER 2027 Eligibility Criteria

You should check the eligibility criteria carefully before applying for IAT 2027. The criteria cover your Class 12 marks, the year you passed, and the subjects you studied. The expected eligibility for IAT 2027 is based on the 2026 pattern — confirm all details from the official brochure when it is released in early 2027.

Academic Qualification

• You must have passed Class 12 (or equivalent) from a recognised board.
• For BS-MS, BTech (Chemical Engineering), and BTech (Data Science): You need Physics, Chemistry, and Mathematics (PCM) in Class 12.
• For BS-MS in Biology or Earth & Climate Science: You need Physics, Chemistry, and Biology (PCB) or PCMB in Class 12.
• Students appearing for Class 12 exams in 2027 are also expected to be eligible, subject to fulfilling the marks criterion after results are declared.

Minimum Marks in Class 12

Year of Passing

For IAT 2027, you should have passed Class 12 in 2025 or 2026, or be appearing in 2027. Candidates who passed Class 12 in 2024 or earlier are generally not eligible. The exact qualifying year will be confirmed in the official IAT 2027 brochure.

Nationality

Indian nationals can apply. OCI (Overseas Citizen of India) and PIO (Person of Indian Origin) cardholders are also expected to be eligible. Foreign nationals may apply with an equivalence certificate from the Association of Indian Universities (AIU).

Age Limit

There is no upper age limit for IAT 2027. You should be at least 18 years of age at the time of admission (before starting the programme in August 2027).

The eligibility criteria above are based on IAT 2026 norms. You must verify the final criteria from the official IAT 2027 brochure on iiseradmission.in once released.

IISER 2027 Application Process

IISER IAT 2027 registration will be done entirely online on iiseradmission.in. The application window is expected from the first week of March 2027 to mid-April 2027. You should complete the application carefully — the portal typically does not allow major edits after submission outside the correction window.

Step-by-Step Application Process

• Step 1 — Register: Visit iiseradmission.in and click on the registration link. Enter your name, email ID, and mobile number to create your login credentials. You will receive a verification OTP on your registered mobile or email.
• Step 2 — Fill the Application Form: Log in and fill in your personal details, academic information (Class 10 and 12 marks, board name, subject combination), and programme preferences (BS-MS / BTech / BS and your discipline choices).
• Step 3 — Upload Documents: Upload a scanned passport-size photograph and signature in the format and file size specified in the brochure. You may also need to upload your Class 12 marksheet or board admit card if already available at the time of application.
• Step 4 — Pay Application Fee: Pay the application fee online through net banking, credit card, or debit card. Based on the 2026 cycle, the expected fee is around ₹2,000 for General, EWS, and OBC-NCL candidates and ₹1,000 for SC, ST, and PwD candidates. The confirmed fee will be in the 2027 brochure.
• Step 5 — Submit and Save: Review your form carefully before submitting. After payment, download the confirmation page and save it — you will need it for future reference and for downloading your admit card.

Application Correction Window

JAC-IISER usually opens a brief correction window in April (after registration closes) to let you fix errors in the submitted form. Not all fields are editable — correction is typically limited to basic details like photograph, signature, or minor personal information errors. Keep an eye on iiseradmission.in during April 2027 for the correction window dates.

You must use a valid and active email ID during registration — all official communication, including your admit card link and result notification, is sent to the registered email.

IISER 2027 Syllabus

The IAT 2027 syllabus covers the NCERT curriculum for Classes 11 and 12 in all four subjects — Biology, Chemistry, Mathematics, and Physics. Questions are application-based and test conceptual clarity. The rationalised NCERT syllabus (post-2023 revision) is the reference for IAT.

Physics Syllabus

• Units and Measurement, Kinematics, Laws of Motion
• Work, Energy and Power; Rotational Motion; Gravitation
• Properties of Solids and Liquids; Thermodynamics; Kinetic Theory of Gases
• Oscillations and Waves
• Electrostatics, Current Electricity, Magnetic Effects of Current and Magnetism
• Electromagnetic Induction and Alternating Currents; Electromagnetic Waves
• Ray Optics and Wave Optics
• Dual Nature of Radiation and Matter; Atoms and Nuclei; Electronic Devices

Chemistry Syllabus

• Basic Concepts of Chemistry, Structure of Atom, Classification of Elements and Periodicity
• Chemical Bonding and Molecular Structure; States of Matter; Thermodynamics
• Equilibrium; Redox Reactions; Hydrogen; s-block and p-block Elements
• Organic Chemistry Basics; Hydrocarbons; Haloalkanes and Haloarenes
• Alcohols, Phenols and Ethers; Aldehydes, Ketones and Carboxylic Acids
• Amines; Biomolecules; Polymers; Chemistry in Everyday Life
• d and f-block Elements; Coordination Compounds; Surface Chemistry; Electrochemistry

Mathematics Syllabus

• Sets, Relations and Functions; Complex Numbers and Quadratic Equations
• Matrices and Determinants; Permutations and Combinations; Binomial Theorem
• Sequences and Series; Coordinate Geometry (straight lines, circles, parabola, ellipse, hyperbola)
• Three-Dimensional Geometry; Vectors
• Differential Calculus: Limits, Continuity, Differentiation and Applications
• Integral Calculus: Indefinite and Definite Integrals; Differential Equations
• Mathematical Reasoning; Statistics and Probability

Biology Syllabus

• Diversity in Living World; Structural Organisation in Plants and Animals
• Cell Structure and Function; Cell Division
• Plant Physiology: Photosynthesis, Respiration, Growth and Movement
• Human Physiology: Digestion and Absorption, Breathing and Exchange of Gases, Circulation, Excretion, Neural Control and Coordination, Chemical Coordination
• Reproduction in Plants and Animals; Human Reproduction; Reproductive Health
• Genetics and Evolution; Molecular Basis of Inheritance
• Biology and Human Welfare; Biotechnology and its Applications
• Ecology and Environment

For Biology-stream candidates targeting BS-MS in Biology or Earth & Climate Science, strong Biology performance is particularly important. For Mathematics-stream candidates targeting BS-MS in Mathematics, Physics, or Chemistry, high scores in Mathematics and Physics are critical. That said, IAT ranks all candidates on a single combined merit list, so you should score well in all four subjects to maximise your rank.

IISER 2027 Admit Card

The IISER IAT 2027 admit card is expected to be released in the third week of May 2027, about two to three weeks before the exam. In 2026, the admit card was released in late May 2026. You can download it from iiseradmission.in by logging in with your registration credentials.

Details Printed on the Admit Card

• Candidate’s name, photograph, and signature
• Registration number and roll number
• Exam date, reporting time, and exam timing
• Exam centre name and complete address
• Important exam-day instructions from JAC-IISER

Documents to Carry on Exam Day

• Printed admit card (black and white printout is acceptable)
• One valid government-issued photo ID: Aadhaar card, PAN card, passport, voter ID, or driving licence
• One recent passport-size photograph (the same as uploaded in the application)

You must carry the printed admit card to the exam centre — entry is not allowed without it. No electronic devices, books, notes, or stationery are allowed inside the exam hall except the admit card and ID proof.

IISER 2027 Answer Key

JAC-IISER releases a provisional answer key after the IAT exam so candidates can cross-check their responses. In 2026, the provisional answer key was released a few days after the June 7 exam, with an objection window running from June 7 to 13, 2026. Candidates could raise objections by paying a nominal fee per question challenged.

Answer Key Process

• Provisional Answer Key: Released on iiseradmission.in a few days after the exam. Candidates can compare their marked responses against the provisional key to estimate their score.
• Objection Window: If you find an error in the provisional key, you can raise a challenge through the official portal by paying the objection fee. Objections submitted outside the portal are not accepted.
• Final Answer Key: After reviewing all valid objections, JAC-IISER releases the final answer key. Marks and ranks are calculated based on the final key. In 2026, the final answer key and result were released together on June 29, 2026.

You should track iiseradmission.in from the day after the exam to get notified about the answer key release. Raising a valid objection could help if you identify a clear error in the provisional key.

Top IISERs Accepting IAT 2027 Score

All seven IISERs accept IAT 2027 scores for admission to their undergraduate programmes. Based on 2026 closing ranks, IISER Kolkata and IISER Pune are among the most selective, followed by IISER Mohali and IISER Bhopal. IISc Bangalore, which also uses IAT, has the highest selectivity of all participating institutes.

Other Institutes Using IAT Scores (2026 Pattern)

Participation of non-IISER institutes in IAT 2027 will be confirmed in the official brochure. The 2027 pattern is expected to be similar to 2026.

Source: iiseradmission.in — IAT 2026 Seat Matrix

IISER 2027 Preparation Tips

With IAT 2027 expected in June 2027, you have more than seven months from October 2026 to prepare. IAT tests conceptual clarity at the Class 11 and 12 NCERT level — the questions are application-based, and genuine understanding matters far more than memorisation.

Build Your Foundation on NCERT

The entire IAT syllabus is based on NCERT textbooks for Classes 11 and 12. You should read NCERT Physics, Chemistry, Mathematics, and Biology thoroughly and understand every concept, derivation, and example. Do not just mark important pages — make sure you can explain each topic in your own words.

Prepare All Four Subjects Equally

IAT gives 15 questions to each subject with equal marks. Unlike JEE or NEET, you cannot afford to drop any subject. If you are from the PCM stream, you must also prepare Biology. If you are from the PCB stream, you must also prepare Mathematics. A balanced score across all four subjects is more valuable than a very high score in two or three subjects and a poor score in one.

Solve Previous Year Papers

IAT question papers from past years are available on coaching websites and on iiseradmission.in. Solving at least five to six years of papers helps you understand the question style, difficulty pattern, and time required per question. IAT questions often involve multi-step reasoning — you will notice this quickly when solving past papers.

Handle Negative Marking Strategically

IAT has a −1 penalty per wrong answer. With only 15 questions per section, two or three wrong answers can cost you a full correct answer’s gain in that section. Attempt a question only when you are at least 60–70% confident in your answer. Skipping an uncertain question costs nothing; a wrong guess costs you 1 mark plus the gain of one future correct attempt.

Take Regular Full-Length Mock Tests

Start taking 3-hour full-length mock tests at least once a week from February–March 2027 onwards. IAT is a CBT, so try to practise on a screen interface when possible. Track your scores and identify weak topics after each mock. With 3 minutes per question on average, time management across four subjects is a skill you must build before the actual exam.

High-Yield Topics by Subject

• Physics: Mechanics (especially energy and momentum), Electrostatics, Optics, and Modern Physics are high-yield areas. Thermodynamics and Waves also appear regularly in IAT.
• Chemistry: Organic Chemistry (reaction mechanisms, named reactions, and functional group conversions), Chemical Bonding, and Equilibrium are the most important. p-block and d-block elements in Inorganic Chemistry also appear frequently.
• Mathematics: Calculus (differentiation and integration, especially applications), Coordinate Geometry, and Probability are the heaviest-weighted areas in recent IAT papers.
• Biology: Cell Biology, Genetics, Human Physiology, and Ecology have historically had the most questions. NCERT Biology diagrams are frequently tested — understand every labelled diagram in the textbook.