How to Fill DU CSAS Portal 2026? Step-by-Step Process, Apply Online Link Active

How to Fill DU CSAS Portal 2026? The University of Delhi (DU) conducts undergraduate admissions through the Common Seat Allocation System (CSAS) Portal 2026. Candidates who have appeared for CUET UG 2026 must complete the CSAS registration process to participate in Delhi University's counselling and seat allocation process. The admission process is conducted in multiple phases, including registration, subject mapping, preference filling, and seat allocation.

This article explains How to Fill DU CSAS Portal 2026, eligibility, required documents, registration process, and the common mistakes candidates should avoid while filling out the application form.

What is the DU CSAS Portal 2026 UG?

The DU CSAS (Common Seat Allocation System) Portal is the official counselling portal through which Delhi University conducts UG admissions. After the declaration of CUET UG results 2026, eligible candidates must register on the CSAS portal to participate in seat allocation for various undergraduate courses offered by DU colleges.

The admission process is completed in three major phases:

• Phase 1: Registration and Personal Details

• Phase 2: Subject Mapping & College Preference Filling

• Phase 3: Seat Allocation and Admission Confirmation

Who Can Apply Through the DU CSAS Portal 2026?

The following candidates can apply through the DU CSAS Portal 2026:

• Students who have appeared for CUET UG 2026.

• Candidates seeking admission to undergraduate courses offered by Delhi University.

• Applicants meeting the course-specific eligibility criteria prescribed by DU.

• Candidates possessing valid educational and category documents (if applicable).

Documents Required Before Filling the DU CSAS Portal 2026 Form

Before beginning the DU UG registration 2026 process, candidates should keep the following documents ready:

• CUET UG 2026 Application Number

• Registered Mobile Number

• Registered Email ID

• Class 10 Marksheet and Certificate

• Class 12 Marksheet

• Category Certificate (SC/ST/OBC-NCL/EWS/PwBD), if applicable

• OBC-NCL/EWS Certificate issued as per the prescribed validity period

• ECA/Sports Certificates (if claiming reservation under these categories)

• Passport-size Photograph and Signature (if required)

Using the same email ID and mobile number used during CUET registration is recommended to avoid login issues.

DU CSAS Portal 2026 Registration Link

Candidates will be able to register online through the official Delhi University admission portal once the CSAS Portal 2026 is activated.

DU CSAS Portal 2026 Registration Link

Candidates should complete the registration only through the official website and avoid using unofficial portals.

Step-by-Step Process to Fill DU CSAS Portal 2026

Follow the steps below carefully while filling the DU CSAS Portal 2026 application form.

Step 1: Visit the Official Website

Go to the official Delhi University admission 2026 portal.

Step 2: Register on the CSAS Portal

Click on the UG Admissions 2026-27 section and select the CSAS Registration link.

Enter:

• CUET Application Number

• Registered Mobile Number or Email ID

Verify the OTP received and create your login password.

Step 3: Login to Your Dashboard

After successful registration, log in using your credentials to access the student dashboard.

Step 4: Fill Personal Information

Complete your personal details carefully.

Most details such as:

• Name

• Photograph

• Signature

• Mobile Number

• Email ID

are automatically fetched from the CUET application. Candidates should verify the information and update only the fields permitted by the university, such as category details where applicable.

Step 5: Enter Academic Details

Fill in your educational qualifications by entering:

• Class 10 details

• Class 12 details

Upload the required academic documents in the prescribed format.

Step 6: Upload Category/ECA/Sports Certificates

Candidates applying under reserved categories or claiming ECA/Sports quota should upload the required certificates issued by the competent authority.

Step 7: Preview the Application Form

Before submitting the form:

• Verify every detail carefully.

• Check uploaded documents.

• Ensure there are no spelling or data entry errors.

Step 8: Pay the Registration Fee

Pay the applicable CSAS registration fee using the available online payment options.

After successful payment, download and save the confirmation page for future reference.

What Happens After DU CSAS 2026 Phase 1?

Once registration is complete, candidates move to Phase 2, where they need to:

• Complete Subject Mapping.

• Check course eligibility.

• Fill college and programme preferences.

• Arrange preferences in the desired order.

• Lock and submit preferences before the deadline.

What Happens in Phase 3?

In Phase 3, Delhi University processes admissions based on:

• CUET UG Scores

• Eligibility

• Subject Mapping

• College Preferences

• Seat Availability

Candidates can then:

• Accept the allotted seat.

• Upgrade to a higher preference in subsequent rounds.

• Freeze the allotted seat.

• Complete fee payment for admission confirmation.

Common Mistakes to Avoid While Filling the DU CSAS Portal 2026

Candidates should avoid the following mistakes during registration:

• Using an incorrect CUET application number.

• Entering a different email ID or mobile number than the one used during CUET registration.

• Uploading incorrect or unclear documents.

• Filling academic details incorrectly.

• Selecting wrong category information.

• Making mistakes in subject mapping.

• Arranging college preferences without proper planning.

• Submitting the form without checking the preview.

• Missing the registration or preference-filling deadlines.

Being careful during each stage can help avoid complications during counselling.

Tips for Successful DU CSAS Registration 2026

• Keep all documents ready before starting the registration.

• Read the admission guidelines carefully.

• Complete every section of the application form.

• Double-check all uploaded documents.

• Save copies of payment receipts and application forms.

• Fill college preferences strategically based on eligibility and interest.

• Complete each phase before the specified deadline.

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