Hello Aspirant,

As a private candidate, yes you can sit for the CBSE Improvement Exam in 2026 only if you satisfy the eligibility criteria of CBSE Examination. Since you have passed your Class 12 (Science Stream) with 91% in 2024, you qualify for improvement if it is in one or more subjects only in the immediate next two years which is 2025 and 2026. According to CBSE guidelines:

• You can improve All Five Major Subjects or even 1 to 3 Subjects.
• You can only improve the subjects you wish to.
• You will have Private Candidate status, and you need to visit CBSE's official portal when the forms are published (most likely October–December).