IAT 2026 Application Form: Steps to Fill, Registration Fees, Eligibility & Other Details

How to Fill IISER 2026 Application Form: The exam officials are expected to release the IISER Entrance Exam 2026 notification tentatively in the last week of January 2026. Candidates interested in pursuing BS-MS, BS, or BTech degree programmes offered by the IISER participating institutes must fill out the IAT 2026 application form within the timeframe specified by the authorities.

The IAT 2026 application form is anticipated to be released online in the second week of March 2026. Before applying, candidates are strongly advised to carefully check the minimum IAT 2026 eligibility criteria to ensure a smooth and hassle-free admission process. The IISER 2026 registration process will be conducted entirely online, starting from account registration and filling in basic details to uploading documents and paying the application fee.

To avoid mistakes during form submission, which may lead to rejection or complications at later stages, it is important for candidates to understand in advance how to fill out the IISER 2026 application form. To help aspirants apply confidently and complete an error-free registration process, this SciAstra blog provides a detailed, step-by-step guide on filling the IISER 2026 application form, along with information on required documents, application fees, and other important details.

Latest Updates: IISER 2026 Mock Test

IAT Registration Dates 2026

Candidates seeking admission to the 5-year Integrated BS-MS/ Four Year BS/BTech courses at IISERs, IIT Madras and IISc Bangalore must know all the important IISER 2026 exam dates. Check out the important IISER 2026 Registration dates from here:

Also Read: NEET vs IAT Syllabus Comparison in Detail

What is IAT 2026 Exam Date?

IISER exam officials are yet to release the exam notification and the complete schedule of the admission process. However, based on the previous year's trend, it is anticipated that the IISER 2026 exam will be conducted in the fourth week of May 2026 in online/CBT mode for the duration of three hours.

Candidates' domain knowledge from the specified subjects like Physics, Chemistry, Mathematics and Biology of the IISER 2026 Syllabus will be tested in the form of MCQ questions.

What is the last date to fill IISER 2026 application form?

Candidates who are interested in filling out the IAT 2026 application form will be given a one-month duration time to register and pay the online registration fees. The exact IISER 2026 registration dates are yet to be announced. Based on the previous year's data, the last date to fill out the IAT 2026 registration form will be the third week of April, 2026. Interested applicants are advised to fill out the form well in advance to have a hassle-free admission process.

Documents Required for IISER 2026 Application Form

While filling out the IISER 2026 application form, candidates must know the specific details related to their identity, qualifications, contact information, and other particulars. Knowing these details in advance will make the hassle- free IAT 2026 registration process. The list of these documents is available as follows:

• Valid Email ID and Mobile Number

• Government-issued Photo ID (Aadhaar Card/Passport/PAN Card/Driving License/Voter ID)

• Class 10 Marksheet (for date of birth proof)

• Class 12 Marksheet / Passing Certificate (if already passed)

• Caste Certificate (SC/ST/OBC-NCL/EWS) issued by a competent authority

• PwD Certificate (if applicable).

• Recent Passport-size Photograph

• Scanned Signature

Also Read: What will be IISER 2026 Cut off?

IISER 2026 Registration Form: Document Size and Dimensions

Based on the document requirements, here is a table of the specifications for the photograph, signature, and caste certificate.

Note: Please go through the instructions provided on the IAT 2025 online Application Portal regarding the specifications of the photograph and signature.

Also Read: How to Prepare for IAT 2026 Biology Section

How to Fill IISER Application Form 2026

Filling out the IAT 2026 application form is one of the most important steps for candidates appearing for the IISER Entrance Exam 2026. To avoid errors during the registration process that could lead to rejection of the application, aspirants are strongly advised to understand in advance how to fill out the IISER 2026 application form.

Check out the step-by-step process of how to fill IAT 2026 application form from here:

Step 1: Visit the Official Website

Initially, candidates are required to visit the official IISER 2026 website and check for the registration tab, which will be indicated in the navigation bar. The official website will be required for all the information that one needs to check or access, from filling out the IAT application form 2026 to downloading the admit card, answer key, result, scorecard, cutoff, and other details.

Official Website- Link will be provided soon

Recommended Browser to fill IISER 2026 Application Form-

Mozilla(94 to 113), Google chrome(88 to 113), Microsoft Edge(88 to 113) to fill in the Application Form. The Application Form is compatible with Android (version 4.0 and above) and iOS (version 9 and above)

Step 2: Creation of a  Registered Account

While filling out the application form, the first and foremost step for the candidate is to create a registered account. This account will be used for the purpose like checking the roll number, downloading the IISER admit card, results, and further counselling process.

Candidates need to provide their name, a valid e-mail address, an active mobile number, and set a password. After successful registration, the candidate’s Enrollment ID and OTP will be sent to the e-mail address and mobile number provided by the candidate.

The candidate needs to use this Enrollment ID along with the password for submitting the application.

Step 3: Log in to the Registered Candidate’s Portal

Now, candidates will be required to log in to their registered account using the User ID and Password. It is highly advised to read all the instructions before proceeding to fill out the application form carefully.

Step 4: Fill Personal Details

Enter your personal information accurately, which is asked by the exam officials:

• Father’s and Mother’s names

• Gender and nationality

• Category (General/OBC-NCL/SC/ST/PwD)

• Aadhaar number or other valid ID proof

Ensure that all details match your official documents.

Step 5: Enter Academic Details

Provide your academic qualifications, such as:

• Class 10 and Class 12 board details

• Year of passing or appearing

• Subjects studied

• Marks obtained or expected

Candidates appearing for the Class 12 examination must select the “Appearing” option where applicable.

Also Read: How to Prepare for IAT 2026 in three months?

Step 6: Upload Required Documents

Upload scanned copies of the following documents in the prescribed format and size:

• Recent passport-size photograph

• Candidate’s signature

• Category certificate (if applicable)

Make sure the images are clear, readable, and meet the specified dimensions to avoid rejection.

Step 7: Select Exam City Preferences

Choose your preferred IISER 2026 exam centre cities from the available list. Candidates are usually allowed to select multiple preferences. Exam centres are allotted based on availability.

Step 8: Pay the Application Fee

Proceed to pay the IISER 2026 application fee using online payment modes such as:

• Debit card

• Credit card

• Net banking

• UPI

After successful payment, a confirmation message will be displayed on the screen.

Step 9: Review and Submit the Application Form

Before final submission, carefully review all entered details. Make corrections if required. Once satisfied, submit the application form. Note that changes may not be allowed after final submission except during the correction window.

Following these steps carefully will help candidates complete the IISER 2026 application process smoothly and without errors. If you want, I can also add a documents checklist, image specifications table, or fee details section to complement this guide.

IAT 2026 Registration Fees

 The application fee is to be paid by the applicant during the submission of the application form.

Note: The IISER 2026 application fee is non-refundable under any circumstances.

Also Read: IAT 2026 Preparation Tips

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, IISc and IIT Madras here:

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