IISER 2026 Sample Paper PDF: Direct Link, Solutions, and Its Importance

IISER Sample Paper 2026 follows the IAT 2026 pattern for the June 07, 2026 exam. You face 60 single-correct questions in the exam, with 15 questions each from Biology, Chemistry, Mathematics, and Physics, +4 marks for each correct answer, -1 for a wrong one, and 3 hours to finish all four sections. Collegedunia provides free subject-wise IISER sample papers with detailed solutions.

• You get about 3 minutes per question on average across all four subjects. That timing is generous on short Biology and Chemistry fact-recalls but tight on longer Maths and Physics numericals. Sample papers help you find your own pace inside each subject.
• Every section in IAT counts toward your final score. Each of the four subjects adds directly to your total of 240. A weak performance in even one subject can drag your rank down, so balanced practice across all four matters more than depth in any one.
• IAT is the only entrance for the 5-year Integrated BS-MS programme at the 7 IISERs, IISc Bangalore, IIT Guwahati, IIEST Shibpur, and IACS Kolkata. The syllabus stays inside NCERT Class XI and XII for all four subjects, so any sample paper that goes beyond NCERT is wrong for IAT prep.

IISER Sample Paper 2026: Download PDF

Download the IISER 2026 sample paper PDFs by subject. Subject-wise IISER sample papers with solutions are listed below.

How to Solve IISER Sample Papers

IAT gives you 180 minutes for 60 questions, which works out to 3 minutes per question. That is a generous pace, and the method below uses the extra time properly without rushing.

• Set real exam conditions: Sit for the full 3-hour timer in one go. IISER does NOT provide an on-screen calculator, and personal calculators are not allowed. Match the CBT setup you will see at the centre.
• Quick scan first: Spend 5 minutes flipping through all 60 questions to spot the fast scoring ones in Biology and Chemistry. Save the long Maths and Physics numericals for the middle of the paper.
• Pace each section at 45 minutes: Splitting 180 minutes evenly across the four subjects gives you 45 minutes per section. Try to keep within that window for each one. If you finish a section in 30 minutes, use the extra time to come back to flagged questions, not to start the next section early.
• Watch the negative marking: Each wrong answer cuts 1 mark out of the +4 a correct answer earns. Three wrong guesses already lose you 3 marks, which matters more in IAT because every section counts toward your final score.
• Use the 3-minute average smartly: Spend up to 4 minutes on a tough Maths or Physics question if you can see a path. Settle short Biology recalls in under 90 seconds. The average evens out across the paper.
• Post-paper analysis is non-negotiable:
  • Note your section-wise score and time spent on each.
  • Tag every wrong answer by reason: concept gap, calculation slip, misread question, or pure guess.
  • Keep a small notebook of NCERT formulas and named-reactions you keep forgetting.
  • Reattempt every wrong and skipped question the next day, untimed.

IISER Sample Paper 2026: Why Solving Them Matters

IAT rewards balanced practice across all 4 subjects. Every section adds directly to your final 240 marks, with no option to drop a weak subject. Sample papers help you check whether all four subjects are at your minimum target before exam day.

• Balanced section practice: A 200 score with one subject at 30 and three at 56-57 looks similar to a 200 score with all four at 50. But the first means you have a weak subject that can pull your total down under exam pressure, and sample papers show you exactly where that gap is.
• Time management across 4 subjects: Most students rush in one subject and waste time in another. Without timed practice, you will not know your real per-subject pace until exam day, by which time it is too late to fix.
• Knowing the IAT difficulty level: IAT stays at NCERT-strict depth across all 4 subjects, with a mix of fact-recall and application questions. Sample papers show you exactly what difficulty to expect so you do not over-prepare or under-prepare on any subject.
• Spotting your weakest subject: Most IAT candidates are strong on 2 of the 4 subjects and weaker on the other 2. Sample papers show you exactly which weak subject needs the most last-mile work before exam day.
• Building the no-calculator habit: IAT does not allow any calculator. Sample papers train you to do faster mental Maths on Coordinate Geometry, Probability, and Physics numericals.
• Tracking the 60-mark-per-section target: After 4 to 5 sample papers, your section-wise score gives you a reliable rough guess of your actual rank. You can plan the last month around what the data shows.

Why Choose Collegedunia's IISER Sample Papers 2026

Many IAT sample papers floating online are either too easy or too hard for the actual exam. Collegedunia's 2026 papers stay at NCERT-strict depth across all 4 subjects, which is the difficulty the actual IAT tests.

• Latest and Accurate: Every paper follows the IAT 2026 pattern released by the IISERs, with 15 single-correct MCQs per section and 60 marks per subject.
• NCERT-strict scope: Questions stay inside Class XI and XII NCERT only. No advanced application-heavy twists, no medical-school depth questions.
• Detailed solutions: Each solution explains the reasoning, the working, and the trap most students fall into. Useful for the longer Physics and Maths questions.
• Even subject mix: Questions are spread evenly across Biology, Chemistry, Maths, and Physics in the proportion past IAT papers have shown.
• User-friendly: Hyperlinked questions and solutions let you jump from any question to its explanation and back without losing your place.
• Free to Download: Every IISER sample paper PDF is free. No login, no email, no payment.

IISER 2026: Exam Pattern at a Glance

The IISERs conduct IAT 2026 on June 07, 2026 in Computer-Based Test mode at centres across India. The paper splits 60 questions evenly across 4 subjects, and every section counts toward your final score. The full pattern is given below.

IAT Marking Scheme: +4 for every correct answer, -1 for every wrong answer, 0 for unattempted questions. All four section scores are added to your final 240.

Duration: 180 minutes (3 hours) | Mode: CBT (online) | Language: English | Calculator: Not allowed

One thing worth knowing: IAT does not have any sectional time limit, but it also does not provide an on-screen calculator. Without one, long Maths and Physics numericals eat into your time fast, so build your sample paper practice around mental Maths from the start.

IISER 2026: Participating Institutes

IAT 2026 is the entrance for the 5-year Integrated BS-MS programme at 11 participating institutes across India.

Mistakes to Avoid While Solving IISER Sample Papers

IAT mistakes usually come from using the wrong prep material and from skipping sections during practice. Watch out for these.

• Do not use sample papers built for other entrance exams as your IAT prep. The pace, marking, and difficulty are tuned differently, and you will train the wrong habits.
• Do not over-prepare on advanced twists or medical-school depth. IAT stays inside NCERT scope, and sample papers that go beyond NCERT waste your prep time.
• Do not skip any of the 4 sections in your prep. Every section adds directly to your final score, so a 15-mark drop in one weak section can move you down 500 ranks.
• Do not guess on partial confidence. The -1 penalty on a +4 mark question means three wrong guesses cancel one solid attempt across the paper.
• Do not try to finish IAT in 100 minutes. IAT gives 180 minutes for a reason. Rushing through Maths and Physics to save time for Biology costs you 10 to 15 marks.
• Do not skip the post-paper review. Five well-reviewed IAT sample papers will move your score more than fifteen rushed ones.