IISER IAT 2027: Exam Dates, Eligibility, Pattern, Syllabus, Cutoff and Counselling

IISER IAT 2027 (Indian Institute of Science Education and Research Aptitude Test) is the national-level entrance exam for admission to undergraduate science programmes at seven IISERs across India. The exam is expected to be held in June 2027 in computer-based mode. Since the 2024-25 cycle, the IISERs have made IAT the sole admission channel — JEE Advanced and KVPY channels are no longer valid routes for IISER undergraduate admissions.

• Registration: IISER IAT 2027 registration is expected to open in March 2027 at iiseradmission.in. In 2026, registration opened on March 5 and closed on April 13, giving students about six weeks to apply.
• Exam Date: IAT 2027 is expected in June 2027. In 2026, the exam was held on June 7, 2026 from 9:00 AM to 12:00 Noon in CBT mode across 736 exam centres nationwide.
• Seats: Around 2,343 seats are available across 7 IISER campuses in BS-MS Dual Degree, BS, and BS-BTech programmes — a similar count is expected for 2027.
• Result: IAT 2027 result is expected in late June 2027. In 2026, the result was declared on June 29, 2026, followed by counselling registration opening July 2.

What is IISER IAT 2027?

IISER IAT (Indian Institutes of Science Education and Research Aptitude Test) is a national entrance test conducted jointly by all seven IISERs for admission to their undergraduate science programmes. The Indian Institutes of Science Education and Research are premier science institutions set up by the Government of India to promote quality science education and cutting-edge research. Their flagship programme is the 5-year BS-MS Dual Degree in science.

The IAT 2027 will test students in Physics, Chemistry, Mathematics, and Biology at the Class 11 and 12 NCERT level. Admission is offered to programmes like Biological Sciences, Chemistry, Earth and Climate Sciences, Mathematics and Statistics, and Physics — with exact offerings varying by campus. In 2026, more than 1.86 lakh candidates appeared for the IAT, competing for just 2,343 seats across all seven IISERs. This makes IISER IAT one of the most competitive science entrance exams in India.

The IISERs were set up starting 2006 under the Ministry of Education. Students enrolled in IISER programmes receive a fellowship under the INSPIRE (Innovation in Science Pursuit for Inspired Research) scheme of the Department of Science and Technology (DST). This fellowship helps cover living costs during the programme. Graduates of IISER BS-MS are well-prepared for PhD programmes at IITs, IISc, and international institutions.

IISER IAT 2027 Important Dates

The official IISER IAT 2027 schedule has not been released yet. As of October 2026, the 2027 cycle has not started. The expected dates below are based on the 2026 cycle timeline. The official schedule will be released at iiseradmission.in once available, likely in February 2027.

All 2027 dates are tentative and based on previous-year trends. Check iiseradmission.in for the official schedule once released in early 2027.

Source: iiseradmission.in — Official IISER Admission Portal

IISER IAT 2027 Eligibility Criteria

You must meet the IISER IAT 2027 eligibility requirements before applying. The criteria cover your Class 12 performance, year of passing, and age. Check each point carefully before filling the application form.

Academic Qualification

You must have passed Class 12 or an equivalent examination with Physics, Chemistry, and at least one of Mathematics or Biology as core subjects. You need a minimum of 60% aggregate marks (or equivalent grade) in the qualifying examination. Students from SC, ST, and PwD categories need a minimum of 55%.

Students currently appearing in Class 12 in 2027 can also apply. However, they must submit their marksheet and meet the minimum marks requirement before admission is confirmed.

Year of Passing

For IISER IAT 2027, students who passed Class 12 in 2025, 2026, or 2027 are expected to be eligible. In 2026, students who passed in 2024, 2025, or 2026 were eligible. The official 2027 brochure will confirm the exact years when released.

Age Limit

You should have been born on or after October 1, 2002 to be eligible for IAT 2027 (based on the 2026 age cutoff of October 1, 2000, shifted by 2 years). SC, ST, and PwD candidates get a 5-year relaxation, so the cutoff for them is expected to be around October 1, 1997.

All criteria above are based on the 2026 pattern and are expected for 2027. The official IISER IAT 2027 notification will publish confirmed eligibility rules when released in early 2027 at iiseradmission.in.

IISER IAT 2027 Application Process

The IISER IAT 2027 application process is fully online at iiseradmission.in. Registration is expected to open in March 2027. You should complete all steps well before the deadline — the portal does not allow last-minute applications after the closing date.

How to Apply for IISER IAT 2027

• Step 1 — New Registration: Visit iiseradmission.in and create a new account using your email address and mobile number. You will get a registration ID and password.
• Step 2 — Fill the Application Form: Log in and complete your personal details, academic information, address, category, and exam city preferences.
• Step 3 — Upload Documents: Upload a recent passport-size photograph and your signature as per the specifications given in the brochure. Photo guidelines are strict — check size, background colour, and file format.
• Step 4 — Pay the Application Fee: Pay online via net banking, debit card, or credit card. The fee is non-refundable.
• Step 5 — Submit and Save Confirmation: Review all details, submit the form, and download the confirmation page for your records.

IISER IAT 2027 Application Fee (Expected)

The application fee is non-refundable in all cases. Confirm the exact fee in the 2027 brochure before payment.

Application Form Correction Window

A short correction window is usually opened after the registration deadline. In 2026, the correction window ran from April 16–18. During this window, you can edit details like exam city choice and category proof. You cannot change your name, date of birth, or programme after form submission. Check iiseradmission.in for the 2027 correction dates once announced.

Exam Centres

In 2026, the IAT was held across 736 exam centres in India. The exam cities span all major states. You can choose your preferred exam city during registration. Actual centre allocation is done by the authorities and shown on your admit card — you may not get your first-choice city in all cases.

IISER IAT 2027 Admit Card

The IISER IAT 2027 admit card is expected to be released in May 2027. In 2026, the admit card was released on May 24 — about two weeks before the June 7 exam. Without the admit card, you will not be allowed to enter the exam centre. Download and print it before exam day.

How to Download IISER IAT 2027 Admit Card

• Go to iiseradmission.in when the admit card is released in May 2027.
• Log in with your IAT 2027 registration number and password or date of birth.
• Your admit card will open on screen. Download the PDF and take a clear printout.
• Carry the printed admit card and a valid government photo ID (Aadhaar, PAN, Passport, or driving licence) to the exam centre.
• A digital copy on your phone is not accepted at the exam centre.

Details Printed on the Admit Card

• Candidate’s name, registration number, and category
• Passport-size photograph and signature
• Exam centre name, address, and reporting time
• Exam date and session timings (9:00 AM to 12:00 Noon, based on 2026 pattern)
• Exam-day instructions and items allowed inside the centre

If you notice any discrepancy in your admit card — wrong name, photo, or category — report it immediately to the IISER admissions helpdesk at the email address mentioned in the admit card. Do not wait until exam day.

IISER IAT 2027 Result

The IISER IAT 2027 result is expected in late June 2027 at iiseradmission.in. In 2026, the result was declared on June 29 — about three weeks after the June 7 exam. The result will show your subject-wise marks and overall rank, and category-wise merit lists will also be published.

How to Check IISER IAT 2027 Result

• Visit iiseradmission.in after the result is announced.
• Log in with your registration number and password or date of birth.
• Your scorecard with subject-wise marks (out of 60 each) and total score (out of 240) will appear.
• Download and save the scorecard — you will need it during counselling.

Merit List and Rank

A common rank list is prepared covering all qualified candidates. Category-wise merit lists (General, OBC-NCL, EWS, SC, ST, PwD) are released separately. There is no campus-wise merit list — a single overall rank is used across all seven IISERs. Campus and programme allotment is done during the counselling process based on your rank and your filled preferences.

Students who qualify the IAT and appear in the merit list are eligible for counselling. Qualifying the merit list does not guarantee a seat — admission depends on your rank, the number of available seats, and the preferences you fill during counselling registration.

Answer Key and Objection Window

In 2026, the provisional answer key was released on the same day as the exam (June 7, 2026). Candidates could raise objections against the answer key within a specified window. After reviewing objections, the final answer key was published before the result. The same process is expected for IAT 2027.

IISER Campuses and Seat Intake 2027

There are seven IISERs in India — from the oldest, established in 2006, to the newest, set up in 2016. All seven offer the 5-year BS-MS Dual Degree in sciences. Some also offer BS and BS-BTech programmes. The total seat count in 2026 was 2,343. A similar or slightly higher number is expected for 2027.

Subjects Offered in BS-MS Dual Degree

The BS-MS Dual Degree programme at IISERs covers five major science disciplines. Not all subjects are available at every campus — check the official brochure for campus-specific availability.

• Biological Sciences — genetics, cell biology, biochemistry, microbiology, ecology
• Chemistry — physical, organic, inorganic, and computational chemistry
• Earth and Climate Sciences — geology, climate science, oceanography, atmospheric science
• Mathematics and Statistics — pure mathematics, applied mathematics, data science
• Physics — classical mechanics, condensed matter, astrophysics, nuclear physics

INSPIRE Fellowship for IISER Students

Every student enrolled in an IISER BS-MS programme receives a scholarship under the INSPIRE (Innovation in Science Pursuit for Inspired Research) scheme funded by the Department of Science and Technology, Government of India. This fellowship provides financial support throughout the 5-year programme, making IISER an accessible choice for students from all economic backgrounds.

Other Institutes Accepting IAT Score

Besides the seven IISERs, some other institutions also consider the IAT score for specific undergraduate science and research programmes. IISc Bangalore and IIT Madras, for example, have accepted IAT scores for certain BS and research programmes. Check the official admission websites of these institutions for specific requirements — their admission criteria may differ from IISER’s counselling process.

IAT: The Only Route to IISER from 2027

A major policy change happened in the 2024-25 admission cycle: the IISERs discontinued the JEE Advanced and KVPY channels and made the IAT the sole route for undergraduate admissions. This change continued in 2026 and is expected to remain the same for 2027 and beyond.

What Changed and Why It Matters

Before 2024-25, students could get into an IISER through three channels:

• IAT Channel: By clearing the IISER Aptitude Test
• JEE Advanced Channel: By securing a high rank in JEE Advanced
• KVPY Channel: Through the Kishore Vaigyaniki Protsahan Yojana fellowship exam

KVPY was discontinued as an independent scholarship scheme and merged with the INSPIRE programme. The JEE Advanced channel was also removed by the IISERs. Now the IAT is the only way to get into IISER undergraduate programmes. This change is the reason IAT registrations jumped from ~1.19 lakh appeared in 2025 to more than 1.86 lakh in 2026 — students who would have applied through JEE Advanced now have to write the IAT.

What This Means for 2027 Aspirants

• You must appear for and clear the IAT 2027 to get into any IISER — a JEE Advanced rank alone will not work.
• Since all four subjects carry equal marks in the IAT, students from a PCM stream must prepare Biology seriously. Skipping Biology means losing 60 out of 240 marks.
• Students targeting both JEE Advanced (for IITs) and IAT (for IISERs) must plan their preparation to cover Biology as well. The Physics, Chemistry, and Mathematics syllabi for both exams overlap heavily.
• Start IAT-specific preparation early — the question style is different from both JEE and NEET. IAT focuses on conceptual depth, not speed of calculation.

Preparation Tips for IISER IAT 2027

IISER IAT 2027 is a concept-heavy exam. You need a strong grasp of all four subjects — Physics, Chemistry, Mathematics, and Biology. With about 1.86 lakh students competing for 2,343 seats in 2026, the competition has grown sharply. Here are subject-wise and general tips to prepare effectively.

Start with NCERT — Read Every Line

All four IAT subjects are NCERT-based. Read every chapter in your Class 11 and 12 NCERT books for all four subjects — including in-text questions and solved examples. Do not skip Biology even if you are from a PCM stream. Biology carries the same 15 questions and 60 marks as any other subject — ignoring it can drop your rank significantly.

Subject-wise Strategy

• Physics: Understand the derivations behind every formula — the IAT often tests conceptual origins. Mechanics, electromagnetism, and optics are high-frequency topics. Numerical problems in IAT Physics are shorter than JEE but require conceptual precision rather than lengthy calculations.
• Chemistry: Physical chemistry (thermodynamics, equilibrium, kinetics) and organic chemistry (reaction mechanisms, name reactions) carry significant weight. Practise drawing structures and writing mechanisms for organic reactions. For inorganic chemistry, thorough NCERT reading is largely sufficient.
• Mathematics: Calculus, coordinate geometry, probability, and vectors are the most tested areas. IAT Maths questions require multi-step reasoning. No calculator is provided in the CBT — practise mental arithmetic and estimation.
• Biology: Read NCERT Biology for Class 11 and 12 thoroughly. Cell biology, genetics (Mendelian and molecular), plant physiology, and ecology are frequently asked. Focus on processes — photosynthesis, respiration, cell division, DNA replication — rather than just memorising names.

Solve Previous Year IAT Papers

Past IAT question papers are the best preparation tool for this exam. They show the exact style of questions — which is different from JEE Main or NEET in both tone and complexity. IAT questions are more thought-provoking and less formula-dependent. Practice past papers under timed conditions — 3 minutes per question on average.

Manage Negative Marking

The IAT applies -1 for every wrong answer. With only 60 questions, one wrong answer cancels the benefit of one correct answer. Track your accuracy during mock tests to build a calibrated guessing strategy. If you can confidently eliminate 2 of the 4 options, attempting the question is statistically worthwhile. If you have no idea, skip it — random guessing hurts your score.

Take Full-Length Mock Tests

Start taking full-length, timed mocks at least 2–3 months before the exam. Aim for 10–15 mocks before exam day. After each mock, spend time analysing your mistakes — understanding why you got a question wrong is more valuable than just knowing the right answer. Weak topics identified through mocks deserve extra focused time.