IAT 2026 Registration Form: Application Dates (Mar 5-Apr 13), Link, Fees, Documents

The IISER 2026 Application Form will be released on March 5, 2026 at iiseradmission.in. Interested candidates who meet the IISER eligibility criteria 2026 will be able to fill out the IISER Aptitude Test Application Form by April 13, 2026. Thereafter, the exam authority will allow candidates to make change in their application form during the IAT 2026 Application Correction Window from April 13 to 15, 2026, at iiseradmission.in

Candidates will be required to make their registrations through their registered account on the official website. The IAT application form 2026 will be divided into many steps where aspirants need to fill in the basic details, like personal and educational information, exam city preferences, and upload the IISER 2026 documents required. The final submission of the application form will be accepted upon payment of the registration fee for the IISER Exam 2026.

Candidates can read this SciAstra exam page to get insight on how to fill the IISER application form 2026, fee details, documents required, the application correction window, editable and non-editable fields, and other details:

Also Read: IAT 2026 Notification

IISER Entrance Exam 2026 Registration Dates

Aspiring candidates of the IISER Aptitude Test 2026 must be aware of important registration-related dates, including the start and last date to fill out the application form, fee payment deadlines, and details about the IAT 2026 application correction window. Candidates can check the section below for complete information regarding IISER 2026 registration dates.

When will the IISER 2026 Application Form be Released?

Candidates interested in taking admission to the BS-MS, BS, and BTech degree programmes offered at IAT 2026 participating institutes will be able to fill out the IAT 2026 registration form from March 5, 2026. Candidates are advised to complete the application process well in advance to avoid last-minute hassles. The last date to fill out the form is April 13, 2026.

What is the Last Date for the IISER 2026 Application Form?

The exam authorities are proving more than a month to candidates to complete the application process. The official last date for the IISER 2026 application form is April 13, 2026.

What is the Last Date for Paying the IISER 2026 Registration Fee?

The final submission of the application form will be completed only after the successful payment of the IAT 2026 registration fee. The exam authorities have not announced a separate date for fee payment, which means that the last date to pay the IISER 2026 registration fee will be the same as the last date to submit the application form, i.e., the April 13, 2026 .

Also Read: IISER Entrance Exam Dates 2026

What are the IISER 2026 Application Correction Window Dates?

Candidates who have successfully submitted their application form and paid the registration fee but made errors while filling in the details need not worry. The exam authorities will provide an opportunity to correct the mistakes.

The IAT 2026 application correction window is expected to open in the third week of April 2026, and the portal will remain active for one to two days only. Candidates must carefully review their application form during this period and make the necessary corrections.

IISER Eligibility Criteria 2026

While planning to appear for the IISER 2026 entrance exam, it is very important for aspiring candidates to check whether they are eligible for the exam or not. The IAT 2026 eligibility criteria specify the minimum marks required in Class 12, subject combinations, nationality, age limit, and other details. Check out the IISER Exam 2026 eligibility criteria from here:
Since the IISER 2026 eligibility criteria are yet to be released by the exam officials, for reference, candidates can check out the previous year’s eligibility.

How to Fill IISER Application Form 2026

Candidates can check out the steps that one need to follow for successful registration of the IAT 2026 application form:

Step 1: Registration at IISER Admission Portal

At first candidates need to visit the official website and need to register themselves. Username and Password will be generated upon successful registration.

IISER 2026 Application Portal Link- Link will be updated

Step 2: Fill out IAT 2026 Application Form 

Through the registered account, candidates are required to fill out the application form in online mode. Below are details asked by the officials to fill in:

1. Personal details like name, DOB, religion, category, disability, etc.

2. Educational details like subject-wise marks achieved, percentage of marks in class 12, name of the board, etc.

3. Filling of exam city preference.

4. Upload of documents like a photograph, signature, class 12 marksheet, and category certificate in the required dimensions.

Step 3: Pay IISER 2026 Application Fee

To successfully submit the application form, candidates will need to pay the registration fee via online mode, like credit card/debit/online banking or UPI payments.

Step 4: Download the Application Form

Upon successful submission of the application form, candidates are required to download the registration form and save it for future use.

Also Read: 

• IISER Syllabus 2026

• IISER Exam Pattern 2026

IISER Exam 2026 Registration Fee

After filling out the details asked by the exam oficials, the last step in the process will be paying the registration fee. Candidates can check out the category wise IISER entrance Exam 2026 registrtaion fee from here:

Documents Required for IISER Application Form 2026

Check out the list of documents that are required and their dimensions, which they are required to be uploaded on the registration portal from here:

• Class 10 pass-out certificate/ marksheet

• Class 12 marksheet

• Passport-size photograph

• Signature of the candidate.

• ID proof (Aadhar Card, driving license)

• Caste Certificate.

Note: If the candidate is appearing for the exam and doesn’t have the mark sheet, they can upload the declaration form- “Declaration by the candidate instead of eligibility exam certificate.

Also Read: IISER Admit Card 2026

IAT 2026 Registration: Document Size Details

During the online application, candidates will have to upload digital copies of their forms / certificates. The acceptable file sizes are mentioned below:

Also Read: IISER 2026 expected cut off

IISER Exam 2026 Test Series Launched

The SciaAstra team has recently launched a FOCUS test series, which will emphasise Full Online Controlled Understanding and Simulation, helping candidates experience the real-time environment of the IISER aptitude test 2026.

The IAT 2026 FOCUS mock test is designed based on the official exam pattern, and the difficulty level is determined through an in-depth analysis of previous years’ question papers. Candidates will get Unit-wise, Half-length, and Full-length test series, covering all chapters to assess their domain understanding, cognitive skills, and analytical abilities as per the IISER 2026 syllabus.

Attempt the IISER Exam 2026 Test Series to check your exam preparation level to get admissions to the IISERs and IISc here:

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Start Your IISER 2026 Preparation

Every year, the difficulty level and competition for the IAT exam continue to rise, making early and strategic preparation essential for success. With expert guidance from dedicated mentors at SciAstra, you can strengthen your preparation and secure admission to prestigious BS-MS, BS, or BTech programmes at IISERs, IISc, and IIT Madras.

Explore the IISER 2026 preparation batches offered by SciAstra and choose the one that best fits your goals — start your journey today!

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