Yes, it is possible to gain admission to the same NITK in a better branch if you score well on JEE Main 2026, even if you have previously been admitted to the same NITK through a lower branch via home state quota. Your past admission does not preclude you from reapplying and securing a better branch if your JEE Main 2026 score is competitive.

Explanation:

JEE Main's Admission Process:

JEE Main is a national-level engineering entrance exam used for admission to NITs and other participating institutions.

Home State Quota:

Home state quota allows students to get preferential admission in NITs based on their state of origin.

No Restriction on Re-admission:

While a student might have been admitted to a specific branch and NIT initially, there is no rule preventing them from reapplying for the same NIT and potentially securing a better branch based on their performance in a subsequent JEE Main exam.

Score-Based Admission:

Admission to NITs is primarily determined by your JEE Main score and your overall rank compared to other candidates.

Higher Score, Better Branch:

A higher JEE Main score will increase your chances of getting into your preferred branch, even within the same NITK.

Considerations:

Rank: Even with home state quota, the overall rank and category-wise cutoffs within NITK play a crucial role in determining which branch you are offered.

Branch Preferences: During the counselling process, you will have the opportunity to express your branch preferences, and the higher your score, the better your chances of getting your top choices.

Cutoffs: Understand the cutoffs for different branches and categories in NITK for previous years to get a better understanding of the competition.

In summary: You can absolutely try for a better branch at NITK by taking JEE Main 2026. Your current admission does not prevent you from reapplying and getting a better branch based on your score.