ISC Class 12 Exam Pattern 2025-26: Subject-Wise Question Paper Format, Marking Scheme, and Weightage
Check the latest ISC Class 12 Exam Pattern 2025-26 with revised question paper pattern, detailed subject-wise marking scheme, section-wise weightage, and key changes for Science, Commerce, and Humanities. Prepare effectively for the 2026 board exams.
ISC Class 12 Exam Pattern: In this article we are providing students with the essential subject-wise marking scheme and weightage required for strategic preparation. This confirms the continuation of the rigorous dual-component assessment system, which divides total marks between an external Written Theory Paper and a compulsory Internal Assessment/Practical component.
Science stream students must prepare for the established 70 marks Theory + 30 marks Practical split, while subjects like Mathematics and Commerce adhere to an 80 marks Theory + 20 marks Project structure. This final, official marking scheme is the roadmap for all students, detailing the exact unit-wise weightage that will dictate the focus of the 3-hour theory examinations. Mastering this pattern is the single most effective way to optimize revision and ensure high scores in the 2026 final results.
ISC Class 12 Exam Pattern 2026:
Understanding the examination structure is the first step to achieving academic success. The Council for the Indian School Certificate Examinations (CISCE) follows a clear, two-part assessment system for most subjects in the ISC Class 12 curriculum.
Core Components of the ISC Class 12 Assessment
The evaluation for most subjects is based on a total of 100 marks and is divided into two broad elements:
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Written Examination Theory Paper: The primary component assessing conceptual knowledge.
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Internal Assessment / Practical Work / Project Work: Evaluates application skills, laboratory work, and in-depth project research.
The following table shows the general weightage assigned to each component.
General Marking Structure of ISC Class 12
The ISC Class 12 examination evaluates each subject on a scale of 100 total marks. The assessment is divided into two primary parts, and the split depends on the subject stream:
| Component | Standard Subjects (Commerce/Humanities) | Science Subjects | English (Paper 2) |
| Written Theory Paper | 80 Marks (80% Weightage) | 70 Marks (70% Weightage) | 100 Marks (100% Weightage) |
| Internal/Practical/Project | 20 Marks (20% Weightage) | 30 Marks (30% Weightage) | 0 Marks |
| Total Marks | 100 | 100 | 100 |
Note: The Medium of Examination for all papers is English, and the Duration of the Theory Exam for most subjects is 3 hours.
ISC Class 12 Detailed Subject-Wise Exam Pattern 2025-26
Preparation strategy must align with the official mark split, particularly the change from 80/20 to 70/30 for Science subjects:
Science Stream
| Subject | Theory Marks | Practical Marks | Practical Breakdown |
| Physics | 70 | 30 | Practical (15) + Project Work (10) + Practical File (5) |
| Chemistry | 70 | 30 | Practical (15) + Project Work (10) + Practical File (5) |
| Biology | 70 | 30 | Practical (15) + Project Work (10) + Practical File (5) |
| Mathematics | 80 | 20 | Internal Assessment/Project Work |
ISC Class 12 Physics Exam Pattern 2025-26:
| Component | Marks Allocated |
| A. Written Theory Paper (Paper I) | 70 Marks |
| Section A (Compulsory) | 14 Marks |
| Section B | 14 Marks |
| Section C | 27 Marks |
| Section D | 15 Marks |
| B. Internal Assessment (Paper II) | 30 Marks |
| Practical Examination | 15 Marks |
| Project Work | 10 Marks |
| Practical File | 5 Marks |
| TOTAL MARKS | 100 Marks |
ISC Class 12 Chemistry Exam Pattern 2025-26:
| Component | Marks Allocated |
| I. Written Theory Paper (Paper I) | 70 Marks |
| Physical Chemistry | 25 Marks |
| Inorganic Chemistry | 20 Marks |
| Organic Chemistry | 2 Marks |
| II. Practical & Project Work (Paper II) | 30 Marks |
| Practical Examination | 15 Marks |
| Project Work | 10 Marks |
| Practical File | 5 Marks |
| TOTAL | 100 Marks |
ISC Class 12 Maths Exam Pattern 2025-26:
| Component | Marks Allocated |
| I. Written Theory Paper (Paper I) | 80 Marks |
| Section A (Compulsory) | 65 Marks |
| Section B (Optional) | 15 Marks |
| Section C (Optional) | 15 Marks |
| II. Project Work (Paper II) | 20 Marks |
| Total Marks | 100 Marks |
ISC Class 12 Biology Exam Pattern 2025-26:
| Component | Marks Allocated |
| A. Written Theory Paper (Paper I) | 70 Marks |
| B. Practical, Project & File (Paper II) | 30 Marks |
| Practical Examination | 15 Marks |
| Project Work | 10 Marks |
| Practical File | 5 Marks |
| TOTAL MARKS | 100 Marks |
Commerce & Humanities Stream
| Subject | Theory Marks | Internal/Project Marks |
| Accounts | 80 | 20 (Project Work) |
| Business Studies | 80 | 20 (Project Work) |
| Commerce | 80 | 20 (Internal Assessment) |
| History / Political Science | 80 | 20 (Project Work) |
ISC Class 12 Accounts Exam Pattern 2025-26:
| Component | Marks Allocated |
| I. Written Theory Paper (Paper I) | 80 Marks |
| Section A (Compulsory) | 60 Marks |
| Section B | 20 Marks |
| Section C | 20 Marks |
| II. Project Work (Paper II) | 20 Marks |
| TOTAL MARKS | 100 Marks |
ISC Class 12 Business Studies Exam Pattern 2025-26:
| Component | Marks Allocated |
| I. Written Theory Paper (Paper I) | 80 Marks |
| Section A | 20 Marks |
| Section B | 60 Marks |
| II. Project Work (Paper II) | 20 Marks |
| TOTAL MARKS | 100 Marks |
ISC Class 12 History Exam Pattern 2025-26:
| Component | Marks Allocated |
| I. Written Theory Paper (Paper I) | 80 Marks |
| Section A (Short Answer) | 20 Marks |
| Section B (Long Answer) | 60 Marks |
| II. Project Work (Paper II) | 20 Marks |
| TOTAL MARKS | 100 Marks |
Language Subjects
| Subject | Theory Marks | Internal Assessment |
| English Paper 1 (Language) | 80 | 20 (Listening & Speaking Skills) |
| English Paper 2 (Literature) | 100 | 0 |
ISC Class 12 English Exam Pattern 2025-26:
| Component | Marks Allocated |
| I. Written Theory Paper (Paper I) | 80 Marks |
| Section A (Compulsory) | 20 Marks |
| Section B | 15 Marks |
| Section C | 15 Marks |
| Section D | 20 |
| II. Project Work (Paper II) | 20 Marks |
| TOTAL MARKS | 100 Marks |
Key Takeaway for ISC 2026 Students
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Science students must allocate significant time to Practical and Project work, as it constitutes 30% of the total score.
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Non-Science students benefit from the consistent 80/20 split, where the 20 marks from Internal/Project Work are critical for boosting the final percentage.
The ISC Class 12 Exam Pattern 2025-2026 is meticulously designed to ensure comprehensive evaluation across conceptual knowledge and practical application. By strategically mastering the official subject-wise marking scheme paying close attention to the 70/30 or 80/20 mark distribution and the precise unit weightage students can optimize their study schedules.
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Apeksha Agarwal is an Education Journalist with over 3.5 years of experience. She covers a wide range of topics, including school board examinations, entrance tests, admissions, results, scholarships, and higher education updates. Over the years, she has closely tracked major examinations such as JEE Main, NEET UG, CUET, and various state-level entrance exams, helping students stay informed throughout their academic journey. Apeksha has a Master's degree in Journalism and Mass Communication and a certificate in Digital Journalism. She is passionate about transforming complex educational developments into clear, accessible, and useful information. Her reporting focuses on providing students, parents, and educators with accurate updates and practical insights on examinations, results, and policy changes. She believes that quality education journalism can make a meaningful difference by helping students make informed decisions about their future.
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