In short: The CBSE Class 12 syllabus for 2026-27 follows the rationalized NCERT curriculum across all three streams. Science subjects have 70 marks theory + 30 marks practical. Commerce and Humanities subjects have 80 marks theory + 20 marks project. This guide covers every subject across all streams with chapter lists and unit-wise marks.
Official Source
The syllabus is available at cbseacademic.nic.in/curriculum_2027.html. Always verify against the official document.
Science Stream
Physics (70 Marks Theory + 30 Practical)
| Unit | Marks |
|---|---|
| Electrostatics | 16 |
| Current Electricity | (included above) |
| Magnetic Effects of Current and Magnetism | 7 |
| Electromagnetic Induction and Alternating Current | 7 |
| Electromagnetic Waves | 3 |
| Optics | 14 |
| Dual Nature of Radiation and Matter | 4 |
| Atoms and Nuclei | 6 |
| Electronic Devices | 7 |
| Communication Systems | (deleted) |
| Total | 70 |
Deleted: Communication Systems chapter has been removed from the board exam in recent years. Verify with the latest circular.
Chapters: Electric Charges and Fields, Electrostatic Potential, Current Electricity, Moving Charges and Magnetism, Magnetism and Matter, Electromagnetic Induction, Alternating Current, EM Waves, Ray Optics, Wave Optics, Dual Nature, Atoms, Nuclei, Semiconductor Electronics.
See the Physics weightage guide and Physics derivations list.
Chemistry (70 Marks Theory + 30 Practical)
| Unit | Marks |
|---|---|
| Solid State | 4 |
| Solutions | 5 |
| Electrochemistry | 5 |
| Chemical Kinetics | 5 |
| Surface Chemistry | 3 |
| p-Block Elements | 6 |
| d and f Block Elements | 5 |
| Coordination Compounds | 5 |
| Haloalkanes and Haloarenes | 5 |
| Alcohols, Phenols and Ethers | 5 |
| Aldehydes, Ketones and Carboxylic Acids | 6 |
| Amines | 4 |
| Biomolecules | 4 |
| Polymers | 3 |
| Chemistry in Everyday Life | 3 |
| General Principles of Isolation of Elements | 2 |
| Total | 70 |
See the Chemistry weightage guide and formulas and reactions list.
Biology (70 Marks Theory + 30 Practical)
| Unit | Marks |
|---|---|
| Reproduction | 14 |
| Genetics and Evolution | 18 |
| Biology and Human Welfare | 14 |
| Biotechnology and Its Applications | 10 |
| Ecology and Environment | 14 |
| Total | 70 |
Chapters: Reproduction in Organisms, Sexual Reproduction in Flowering Plants, Human Reproduction, Reproductive Health, Principles of Inheritance, Molecular Basis of Inheritance, Evolution, Human Health and Disease, Strategies for Enhancement in Food Production, Microbes in Human Welfare, Biotechnology Principles and Processes, Biotechnology Applications, Organisms and Populations, Ecosystem, Biodiversity and Conservation, Environmental Issues.
See the Biology weightage guide and Biology diagrams list.
Mathematics (80 Marks Theory + 20 Internal)
| Unit | Marks |
|---|---|
| Relations and Functions | 8 |
| Algebra | 10 |
| Calculus | 35 |
| Vectors and 3D Geometry | 14 |
| Linear Programming | 5 |
| Probability | 8 |
| Total | 80 |
See the Maths weightage guide and complete Maths formulas list.
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Commerce Stream
Accountancy (80 Marks Theory + 20 Project)
| Part | Marks |
|---|---|
| Part A: Accounting for Partnership Firms and Companies | 60 |
| Part B: Analysis of Financial Statements | 20 |
| Total | 80 |
See the Accountancy weightage guide.
Business Studies (80 Marks Theory + 20 Project)
| Part | Marks |
|---|---|
| Part A: Principles and Functions of Management | 50 |
| Part B: Business Finance and Marketing | 30 |
| Total | 80 |
See the Business Studies weightage guide.
Economics (80 Marks Theory + 20 Project)
| Part | Marks |
|---|---|
| Part A: Introductory Macroeconomics | 40 |
| Part B: Indian Economic Development | 40 |
| Total | 80 |
English Core (80 Marks Theory + 20 Internal)
| Section | Marks |
|---|---|
| Reading Skills | 22 |
| Creative Writing Skills | 18 |
| Literature | 40 |
| Total | 80 |
Humanities Stream
History (80 Marks Theory + 20 Project)
Themes in Indian History (Parts I, II, III). Covers ancient, medieval, and modern Indian history through source-based and thematic approaches.
Political Science (80 Marks Theory + 20 Project)
Contemporary World Politics + Politics in India Since Independence.
Geography (70 Marks Theory + 30 Practical)
Fundamentals of Human Geography + India: People and Economy.
Sociology, Psychology, Home Science
Each follows the 80+20 structure with subject-specific unit distributions.
Key Changes in 2027
- NEP 2020 integration continues. The competency-based question format (application, analysis, evaluation) carries more weight than pure recall.
- Case-based and source-based questions appear in every subject. Practice reading and interpreting data.
- Internal assessment counts for 20-30 marks per subject. Do not neglect projects and practicals.
Frequently Asked Questions
Is the CBSE Class 12 syllabus reduced for 2027?
The syllabus was rationalized in previous years and the 2026-27 session continues with the same rationalized version. No further reductions have been announced for 2027.
Are all NCERT chapters included in the board exam?
Not necessarily. Some chapters are in the NCERT textbook but excluded from the board exam syllabus (e.g., Communication Systems in Physics). Always check the official syllabus document.
Where can I download the syllabus PDF?
Visit cbseacademic.nic.in → Curriculum → 2026-27 Session → Select your class and stream.
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