IISER IAT 2026 Round 4 Cutoff Released: Check Seat Deadlines

The Indian Institutes of Science Education and Research (IISER) have officially announced the IISER IAT 2026 Round 4 Cutoff and seat allotment results today. For thousands of aspiring scientists across India, the release of the fourth round results at iiseradmission.in marks a critical juncture in the 2026 admission cycle.

As seats across the prestigious IISER campuses in Pune, Kolkata, Mohali, Bhopal, Thiruvananthapuram, Tirupati, and Berhampur begin to fill up, candidates must act swiftly to secure their spot in these premier research-oriented institutions. The IISER Aptitude Test (IAT) remains one of the most competitive entrance exams for students pursuing the 5-year BS-MS dual degree programs, and the Round 4 release often sees significant shifts in closing ranks as students opt for other engineering or medical streams.

At MatchToCollege, we understand that navigating the counseling process can be overwhelming. The Round 4 announcement is not just about a list of numbers; it is about making a life-changing decision between various campuses and research specializations. This blog provides a comprehensive breakdown of the cutoff trends, the mandatory steps to follow for seat acceptance, and the documentation required to finalize your admission. Whether you have been allotted your first choice or are still hoping for an upgrade in subsequent rounds, understanding the nuances of the iiseradmission.in portal is essential for a smooth transition into your academic career in the sciences.

The competition for IISER seats has intensified in 2026, reflecting the growing interest in pure sciences and interdisciplinary research. With the Round 4 results now public, candidates must pay close attention to the 'Last Date to Accept Seat' to avoid forfeiting their hard-earned rank. Missing this deadline often results in the permanent removal of the candidate from the counseling pool. In the following sections, we will delve deep into the specifics of the Round 4 closing ranks and provide a step-by-step guide on how to navigate the portal effectively, ensuring you don't miss out on your dream campus.

IISER has released the IAT 2026 Round 4 seat allotment and closing ranks at iiseradmission.in. Allotted candidates must confirm willingness and pay the Seat Acceptance Fee by August 20 2026 to lock the BS MS seat.

The Indian Institutes of Science Education and Research (IISER) has released the Round 4 seat allotment. The IISER Aptitude Test (IAT) 2026 result is live on the official portal. Candidates can check the allotted institute at iiseradmission.in. The Round 4 closing ranks are also available on the same page.

Allotted candidates must confirm their willingness inside the login window. The Seat Acceptance Fee (SAF) must be paid by August 20, 2026. Missing this deadline will cancel the Round 4 offer.

IISER IAT 2026 Round 4 Key Details

The Round 4 allotment covers admission to the five-year BS MS dual degree programme. It also covers the four-year BS programme where offered. The table below lists the core details of this round.

Participating IISERs

Seven IISER campuses are taking part in the 2026 counselling. Each campus publishes its own round-wise closing ranks by category. The institutes covered under this Round 4 allotment are listed below.

• IISER Berhampur
• IISER Bhopal
• IISER Kolkata
• IISER Mohali
• IISER Pune
• IISER Thiruvananthapuram
• IISER Tirupati

How to Check the IISER IAT 2026 Round 4 Seat Allotment?

The Round 4 result is available inside the candidate login. Follow the steps below to view the allotted institute and closing ranks.

1. Open the official portal at iiseradmission.in.
2. Click on the Round 4 seat allotment link on the homepage.
3. Enter your application number and password.
4. View the allotted IISER on the dashboard.
5. Download and save the allotment letter for records.

How to Accept the Round 4 Seat and Pay the SAF?

Candidates must confirm their willingness for the allotted seat inside the portal. The Seat Acceptance Fee is paid online before the deadline. Three willingness options are available in the login.

• Freeze: Accept the current allotment as the final admission.
• Float: Accept the current seat but stay in the running for a better campus.
• Withdraw: Exit the counselling process entirely.

Selecting Freeze or Float locks in the current seat. Withdrawal removes the candidate from all future rounds. The final deadline for all three actions is August 20, 2026.

Why This Round Matters

Round 4 is one of the last chances to lock a BS MS seat before Round 5. Closing ranks usually loosen as top choices get filled. Candidates on the border of a preferred campus should watch the movement closely.

Action Plan for Candidates

1. Log in to iiseradmission.in and check the Round 4 allotment.
2. Compare the allotted campus with your original preference list.
3. Keep your Class 12 marksheet, IAT scorecard, and category certificate ready.
4. Choose Freeze, Float, or Withdraw inside the portal.
5. Pay the Seat Acceptance Fee online before August 20, 2026.
6. Save the payment receipt and confirmation email for records.