What are the complete IAT 2026 important dates?
The IAT 2026 application window ran from March 5 to April 13, 2026. The admit card was released on May 26, 2026. The exam was conducted on June 7, 2026 (9 AM–12 PM, CBT mode). The provisional answer key was released on June 7, 2026 itself. The response sheet and objection portal opened on June 9, 2026, with the objection window closing on June 13, 2026. The final answer key and IAT 2026 result are expected in the 4th week of June 2026. Counselling begins in July 2026 over 8–9 online rounds.
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- IAT 2026 Complete Date Sheet at a Glance
- Application Date & Registration Details
- IAT 2026 Admit Card – Release & Download
- IAT 2026 Exam Date – What Happened on June 7
- Answer Key Dates – Provisional, Objection & Final
- IAT 2026 Result Date & Scorecard Details
- IAT 2026 Counselling Schedule & Seat Acceptance
- Participating Institutes – New Additions in 2026
- IAT 2027 Expected Date Sheet
- People Also Ask – FAQs
1. IAT 2026 Complete Date Sheet at a Glance
This is the full, event-wise schedule for the IISER Aptitude Test 2026. All dates are sourced from the official IISER admissions portal — iiseradmission.in. Where exact dates are not yet released by authorities, they are clearly marked as "Expected" based on previous year patterns.
| IAT 2026 Event | Date | Status |
|---|---|---|
| IAT 2026 Official Notification Release | Early February 2026 | DONE |
| Application Form Opens | March 5, 2026 | DONE |
| Last Date to Submit Application Form | April 13, 2026 | CLOSED |
| Application Form Correction Window | April 13–15, 2026 | DONE |
| IAT 2026 Admit Card Released | May 26, 2026 | OUT |
| IAT 2026 Exam Date | June 7, 2026 (9 AM–12 PM) | CONCLUDED |
| IAT 2026 Provisional Answer Key Released | June 7, 2026 | OUT |
| Response Sheet (OMR) Available for Download | June 9, 2026 | TODAY |
| Answer Key Objection Portal Opens | June 9, 2026 | OPEN |
| Last Date to Raise Objections | June 13, 2026 | UPCOMING |
| IAT 2026 Final Answer Key | 4th week of June 2026 (Expected) | AWAITED |
| IAT 2026 Result / Rank Card | 4th week of June 2026 (Expected) | AWAITED |
| IAT 2026 Counselling Registration Opens | July 2026 (Expected) | AWAITED |
| Counselling Rounds (8–9 Rounds) | July–September 2026 (Expected) | AWAITED |
| Classes Begin at IISERs (Autumn Semester) | Late July / August 2026 (Expected) | AWAITED |
2. IAT 2026 Application Date & Registration Details
The IAT 2026 application window is now closed. Here is a complete breakdown of every step of the registration process for record and for students planning for IAT 2027.
Application Timeline
| Event | Date |
|---|---|
| Application portal went live | March 5, 2026 |
| Deadline to submit application | April 13, 2026 |
| Correction window (name, photo, details) | April 13–15, 2026 |
Application Fee
| Category | Application Fee |
|---|---|
| General / OBC-NCL / EWS | 2,000 |
| SC / ST / PwD | 1,000 |
Eligibility Criteria for IAT 2026
| Criteria | Requirement |
|---|---|
| Qualifying Exam | Class 12 (or equivalent) from a COBSE-recognised board |
| Year of Passing | 2024, 2025, or 2026 |
| Subjects (Class 12) | Any 3 of: Physics, Chemistry, Mathematics, Biology |
| Minimum Marks – General/OBC/EWS | 60% aggregate in Class 12 |
| Minimum Marks – SC/ST/PwD | 55% aggregate in Class 12 |
| Nationality | Indian Citizens, PIO, OCI, Foreign Nationals |
3. IAT 2026 Admit Card – Release & Download
The IAT 2026 Hall Ticket (Admit Card) was officially released on May 26, 2026 at iiseradmission.in. Candidates who had successfully submitted their application and paid the fee could download it by logging in with their application number and password.
What the Admit Card Contains
4. IAT 2026 Exam Date – What Happened on June 7
The IISER Aptitude Test 2026 was successfully conducted on June 7, 2026 from 9:00 AM to 12:00 PM in a single shift across multiple Computer-Based Test (CBT) centres in India. IISER Berhampur was the coordinating institute for IAT 2026.
IAT 2026 Exam Pattern
| Parameter | Details |
|---|---|
| Mode | Computer-Based Test (CBT) — Single Shift |
| Duration | 3 Hours (9:00 AM to 12:00 PM) |
| Total Questions | 60 MCQs (15 per subject) |
| Total Marks | 240 (4 marks per correct answer) |
| Subjects | Physics, Chemistry, Mathematics, Biology (60 marks each) |
| Negative Marking | –1 mark per wrong answer |
| Language | English and Hindi |
| Syllabus Base | NCERT Class 11 & 12 (Class 11 topics had higher weightage in 2026) |
IAT 2026 Paper Analysis (Student Feedback)
| Subject | Difficulty Level | Key Observations |
|---|---|---|
| Physics | Moderate | Concept-based; Class 11 mechanics and optics dominant |
| Chemistry | Moderate to Difficult | Organic chemistry had higher weightage than expected |
| Mathematics | Moderate | Calculus and coordinate geometry featured prominently |
| Biology | Moderate to Difficult | Genetics and cell biology required NCERT depth |
Overall difficulty: Moderate. Class 11 topics carried higher question weightage in 2026 as compared to previous years.
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Predict My Rank – Free5. IAT 2026 Answer Key – Provisional, Objection & Final
The IAT 2026 answer key process follows a three-stage structure: provisional release, objection window, and final answer key. Here is the complete schedule with current status.
| Stage | Date | Status |
|---|---|---|
| Provisional Answer Key Released | June 7, 2026 (same day as exam) | OUT |
| Response Sheet (OMR) Available | June 9, 2026 | TODAY |
| Objection Portal Opens | June 9, 2026 | OPEN |
| Objection Window Closes | June 13, 2026 | UPCOMING |
| Final Answer Key Released | 4th week of June 2026 (Expected) | AWAITED |
How to Raise an Objection Against IAT Answer Key 2026
- Visit iiseradmission.in and log in with your application credentials.
- Click on "View / Challenge Answer Keys" link on the homepage.
- Select the question you wish to challenge and mark the correct option you believe is right.
- Upload a supporting document (NCERT page, reference book scan, etc.) as evidence.
- Pay the objection fee of ?200 per question via online mode (UPI / Net Banking / Debit Card).
- Submit and save your claim. You will receive a confirmation.
How to Calculate Your IAT 2026 Score
Marking Scheme:
Correct answer → +4 marks
Wrong answer → –1 mark
Unattempted → 0 marks
Formula: (Correct × 4) – (Wrong × 1) = Total Score out of 240
6. IAT 2026 Result Date & Scorecard Details
The IAT 2026 result has not been declared yet as of June 9, 2026. Based on the post-exam schedule and previous year patterns, the result is expected in the 4th week of June 2026 — after the final answer key is released.
What the IAT 2026 Rank Card Will Contain
How to Download IAT 2026 Result
- Go to iiseradmission.in after the result declaration date.
- Click on the "IAT 2026 Rank Card" or "Result" link on the homepage.
- Log in using your registered email / application number and password.
- Your rank card will appear on the screen with all details.
- Download and save the PDF — it will be required for counselling registration.
Expected Score vs. Rank Ranges (Based on 2025 Trend)
| Score Range (out of 240) | Expected AIR Range | Likely Admission Outcome |
|---|---|---|
| 200+ | 1–80 | IISc Bangalore / IISER Pune Round 1 |
| 184–199 | 80–500 | IISER Kolkata / Pune Round 1 |
| 150–183 | 500–2,500 | IISER Kolkata (later rounds) / Mohali / Bhopal |
| 120–149 | 2,500–6,000 | IISER Tirupati / Berhampur (later rounds) |
| Below 100 | 8,000+ | Unlikely to receive admission at any IISER |
Disclaimer: These are indicative ranges based on 2025 data. Actual 2026 cutoffs will vary with exam difficulty and candidate count.
7. IAT 2026 Counselling Schedule & Seat Acceptance
IAT 2026 counselling is conducted entirely online at iiseradmission.in. Based on the result declaration in the 4th week of June 2026, counselling is expected to begin in July 2026. In 2025, nine rounds of counselling were conducted. Each round has strict deadlines for accepting or rejecting the allotted seat.
Seat Acceptance Fee (SAF) – IAT 2026
| Category | Seat Acceptance Fee | Adjusted Against |
|---|---|---|
| General / OBC-NCL / EWS | 25,000 | First semester institute fee |
| SC / ST / PwD | 12,500 | First semester institute fee |
Counselling Options After Each Round
Documents Required During Counselling & Reporting
| Document | Purpose |
|---|---|
| Class 10 Marksheet & Certificate | Date of birth & school verification |
| Class 12 Marksheet & Certificate | Eligibility verification (60% / 55%) |
| IAT 2026 Admit Card | Exam attendance proof |
| IAT 2026 Rank Card (Result) | Admission eligibility |
| Category Certificate (if applicable) | OBC / SC / ST / EWS / PwD reservation claim |
| Valid Photo ID (Aadhaar / Passport) | Identity verification |
| Recent Passport-size Photographs | Institute admission records |
8. IAT 2026 Participating Institutes – New Additions
A significant change in 2026: four new institutions — IACS Kolkata, IIT Guwahati, IIT Madras, and IIEST Shibpur — have been added to the IAT participation list, bringing the total to 11 institutes. Note that counselling for IISERs is conducted at iiseradmission.in, while IISc, IIT Madras, and IIT Guwahati conduct their own separate admissions using the IAT score.
| # | Institute | Location | New in 2026 |
|---|---|---|---|
| 1 | IISER Pune | Pune, Maharashtra | No |
| 2 | IISER Kolkata | Mohanpur, West Bengal | No |
| 3 | IISER Mohali | Mohali, Punjab | No |
| 4 | IISER Bhopal | Bhopal, Madhya Pradesh | No |
| 5 | IISER Thiruvananthapuram | Thiruvananthapuram, Kerala | No |
| 6 | IISER Tirupati | Tirupati, Andhra Pradesh | No |
| 7 | IISER Berhampur | Berhampur, Odisha | No |
| 8 | IISc Bangalore | Bengaluru, Karnataka | No (long-standing) |
| 9 | IACS Kolkata | Kolkata, West Bengal | NEW in 2026 |
| 10 | IIT Guwahati | Guwahati, Assam | NEW in 2026 |
| 11 | IIEST Shibpur | Shibpur, West Bengal | NEW in 2026 |
| — | IIT Madras | Chennai, Tamil Nadu | NEW in 2026 |
9. IAT 2027 Expected Date Sheet – Start Preparing Now
If you are a Class 11 student or missed IAT 2026, here is the expected timeline for IAT 2027 based on the consistent annual pattern observed over the last 3 years.
| Event | Expected Date (IAT 2027) |
|---|---|
| Official Notification | January–February 2027 |
| Application Form Opens | Early March 2027 |
| Application Deadline | Mid-April 2027 |
| Admit Card Release | Late May 2027 |
| IAT 2027 Exam Date | 1st week of June 2027 (likely June 6 or 7) |
| IAT 2027 Result | Last week of June 2027 |
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