CBSE Class 12 Syllabus 2026-27: All Streams & PDF
CBSE Class 12 syllabus 2026-27 does not follow one fixed marks split across every subject. CBSE sets CBSE Class 12 2026-27 across three streams, Science, Commerce, and Arts, but Physics, Chemistry, and Biology use a 70:30 theory-to-practical split rather than the 80:20 pattern followed by Mathematics and most Commerce subjects. This cycle also introduces a genuine change: students can now attempt the board exam twice a year, in February and again in May, and keep the better score. Four new skill-based subjects have also been added alongside the regular electives. This page covers the real subject-wise topics, the marks split by subject, chapter weightage, and the official syllabus PDF.
CBSE Class 12 2026-27 Syllabus Highlights
Every CBSE Class 12 subject stays worth 100 marks overall, but how those 100 marks split between theory and practical or project work depends entirely on the subject chosen.
| Particulars | Details |
|---|---|
| Board | Central Board of Secondary Education (CBSE) |
| Streams | Science, Commerce, Arts (Humanities) |
| Exam Mode | Offline, pen and paper |
| Marks per Subject | 100 (theory plus practical, project, or internal assessment) |
| Question Types | MCQ, competency-based (case and source-based), short and long answer |
| Negative Marking | None |
| Passing Marks | 33% in theory and 33% in practical or internal assessment, counted separately |
| Attempts per Year | 2 (February main exam, May improvement exam) |
| Grading | 9-point grading system |
| Official Syllabus Source | cbseacademic.nic.in |
Why the 80:20 Split Is Not the Same for Every Subject
A single number gets repeated so often that it has become a common misunderstanding about CBSE Class 12. Physics, Chemistry, and Biology do not follow the familiar 80 marks theory plus 20 marks practical pattern. These three subjects actually split 70 marks theory and 30 marks practical, with an external examiner present for the practical exam alongside the school's own internal examiner. Mathematics stays closer to the familiar pattern, with 80 marks theory and 20 marks internal assessment. Commerce subjects follow their own version again: Accountancy splits its 80 theory marks into two parts and adds 20 marks of practical work, while Business Studies and Economics generally follow an 80 theory plus 20 project work structure. A student assuming every subject follows the same 80:20 split risks misjudging exactly how many marks are riding on the practical exam itself, particularly in the three core Science subjects where practicals are worth ten marks more than most people expect, and where a poor practical performance can pull down an otherwise strong overall result more than students realise.
Subject-Wise CBSE Class 12 Syllabus
CBSE's subjects below cover the most searched combinations across all three streams. Every other elective subject follows the same general structure: a theory paper plus practical, project, or internal assessment specific to that subject.
Physics
Physics in CBSE Class 12 2026-27 carries 70 theory marks and 30 practical marks, with the practical exam conducted by an external examiner alongside the school's own staff. The theory paper draws heavily on numerical problems built around the four unit groups below.
| Unit | Key Topics | Marks Split |
|---|---|---|
| Electrostatics and Current Electricity | Electric Charges and Fields, Electrostatic Potential, Current Electricity | 70 theory, 30 practical |
| Magnetism and Electromagnetic Induction | Moving Charges and Magnetism, Magnetism and Matter, EMI and Alternating Current | 70 theory, 30 practical |
| Optics | Ray Optics, Wave Optics | 70 theory, 30 practical |
| Modern Physics | Dual Nature of Radiation and Matter, Atoms, Nuclei, Semiconductor Electronics | 70 theory, 30 practical |
Chemistry
CBSE Class 12 Chemistry follows the same 70:30 split as Physics, and it spans the three traditional branches. Organic Chemistry carries the widest spread of topics of the three, since it covers several distinct compound families in one paper.
| Unit | Key Topics | Marks Split |
|---|---|---|
| Physical Chemistry | Solutions, Electrochemistry, Chemical Kinetics | 70 theory, 30 practical |
| Inorganic Chemistry | d and f Block Elements, Coordination Compounds | 70 theory, 30 practical |
| Organic Chemistry | Haloalkanes and Haloarenes, Alcohols Phenols and Ethers, Aldehydes Ketones and Carboxylic Acids, Amines, Biomolecules | 70 theory, 30 practical |
Mathematics
Mathematics is one of the few CBSE Class 12 subjects that keeps the familiar 80:20 split, with internal assessment replacing a lab-based practical exam entirely. Calculus alone makes up a large share of this subject, covered in detail later in this page.
| Unit | Key Topics | Marks Split |
|---|---|---|
| Relations, Functions and Algebra | Relations and Functions, Inverse Trigonometric Functions, Matrices and Determinants | 80 theory, 20 internal assessment |
| Calculus | Continuity and Differentiability, Applications of Derivatives, Integrals, Differential Equations | 80 theory, 20 internal assessment |
| Vectors and Geometry | Vector Algebra, Three Dimensional Geometry, Linear Programming | 80 theory, 20 internal assessment |
| Probability | Conditional Probability, Bayes' Theorem, Probability Distributions | 80 theory, 20 internal assessment |
Biology
CBSE Class 12 Biology also follows the 70:30 theory-to-practical split, and its four units move from reproduction through genetics into applied and ecological topics. Genetics and Evolution generally carries the heaviest weight of the four.
| Unit | Key Topics | Marks Split |
|---|---|---|
| Reproduction | Sexual Reproduction in Flowering Plants, Human Reproduction, Reproductive Health | 70 theory, 30 practical |
| Genetics and Evolution | Principles of Inheritance, Molecular Basis of Inheritance, Evolution | 70 theory, 30 practical |
| Biology and Human Welfare | Human Health and Disease, Microbes in Human Welfare | 70 theory, 30 practical |
| Biotechnology and Ecology | Biotechnology Principles and Applications, Ecosystem, Biodiversity | 70 theory, 30 practical |
Business Studies
This CBSE Class 12 subject splits its 80 theory marks into two equal parts and adds 20 marks of project work rather than a lab practical. The two broad units below cover management principles and the applied finance and marketing side of the subject.
| Unit | Key Topics | Marks Split |
|---|---|---|
| Principles and Functions of Management | Nature of Management, Planning, Organising, Staffing, Directing, Controlling | 80 theory, 20 project work |
| Business Finance and Marketing | Financial Management, Financial Markets, Marketing Management, Consumer Protection | 80 theory, 20 project work |
Accountancy
Accountancy in CBSE Class 12 2026-27 carries 80 theory marks split into two parts, plus 20 marks of practical work built around real accounting problems rather than a project report. Partnership and company-level accounting make up the bulk of the syllabus.
| Unit | Key Topics | Marks Split |
|---|---|---|
| Partnership Accounting | Accounting for Partnership Firms, Reconstitution and Dissolution | 80 theory, 20 practical |
| Company Accounts and Analysis | Accounting for Share Capital and Debentures, Financial Statement Analysis, Cash Flow Statement | 80 theory, 20 practical |
Economics
CBSE Class 12 Economics follows the same 80 theory plus 20 project work structure as Business Studies, and it splits cleanly into two halves: theoretical macroeconomics and applied study of the Indian economy itself.
| Unit | Key Topics | Marks Split |
|---|---|---|
| Introductory Macroeconomics | National Income and Related Aggregates, Money and Banking, Determination of Income and Employment | 80 theory, 20 project work |
| Indian Economic Development | Government Budget and the Economy, Balance of Payments, Development Experience of India | 80 theory, 20 project work |
Chapter-Wise Weightage in the Most-Searched Subjects
A handful of chapters carry real, disproportionate weight in CBSE Class 12, and this pattern has stayed fairly consistent across recent years.
| Subject | High-Weightage Chapter | Approximate Marks |
|---|---|---|
| Mathematics | Calculus | 35 out of 80 |
| Physics | Electrostatics and Current Electricity | Around 20 out of 70 |
| Chemistry | Electrochemistry and Aldehydes, Ketones and Carboxylic Acids | Around 15 out of 70 combined |
| Biology | Genetics and Evolution | Around 18 out of 70 |
Mathematics stands out here, since Calculus alone accounts for close to half the theory marks in that subject, more concentrated than the weightage pattern seen in Physics, Chemistry, or Biology. A student weak in Calculus specifically is at a real disadvantage in Mathematics that a similar weakness in a single Biology unit would not create to the same degree, since Biology spreads its marks more evenly across four broad units.
CBSE Class 12 2026-27: Two Exam Attempts a Year
This is a real structural change to how CBSE's board exam works this cycle, not a minor update to the syllabus itself.
- The main examination is held in February, following the board's usual annual cycle
- An optional improvement examination is now held in May for the same academic session
- A student's final marksheet reflects whichever of the two attempts produced the higher score
- Both regular students and compartment candidates can appear for the May exam under the conditions the board sets
- This does not change what is tested, since the syllabus stays identical across both attempts, only the opportunity to retake it changes
- A student happy with their February result is not required to sit the May exam at all
Four New Skill Subjects Added This Cycle
CBSE has introduced four new skill-based subjects for the current session, alongside the regular academic electives, continuing the board's push toward vocational and skill-based learning under NEP 2020.
| New Skill Subject | Focus Area |
|---|---|
| Land Transportation Associate | Vocational training linked to transport and logistics |
| Electronics and Hardware | Applied electronics and hardware maintenance skills |
| Physical Activity Trainer | Sports science and fitness training |
| Design Thinking and Innovation | Structured problem-solving and creative design methods |
These skill subjects can be taken alongside or, in specific combinations, in place of certain academic electives, depending on the stream and the student's overall subject combination. A school must offer the specific skill subject for a student to opt into it, so availability varies from one school to another.
Where to Find the Official CBSE Class 12 Syllabus PDF
The official CBSE academic portal remains the only fully reliable source for exact chapter lists:
- The complete syllabus for every subject is published on cbseacademic.nic.in under the Curriculum section
- Download only the PDF for the subjects actually chosen, since elective combinations vary widely by school and stream
- No major syllabus reduction has been announced for this cycle, though some topics have been updated to align with NEP 2020
- The same official portal also carries sample question papers and marking schemes, worth reading alongside the syllabus itself
- Cross-check any aggregator topic list against the current official curriculum document before finalising a study plan
CBSE Class 12 Syllabus 2026-27 FAQs
Ques: Is the practical exam marks split the same for Physics and Mathematics?
Ans: No. Physics carries 30 practical marks against 70 theory marks, while Mathematics carries only 20 marks under internal assessment against 80 theory marks. The two subjects follow different splits entirely.
Ques: Can a student appear for the May improvement exam in every subject?
Ans: This depends on the specific conditions the board sets each year for regular and compartment candidates, so students should confirm eligibility subject by subject rather than assume every subject qualifies automatically.
Ques: Does failing the practical exam affect a student even with a high theory score?
Ans: Yes. Theory and practical or internal assessment marks are counted separately for passing purposes, so a student must clear 33% in each component on its own, not just in the combined total.
Ques: Are the four new skill subjects compulsory for every student?
Ans: No. They are optional additions to the regular subject list, and a student can choose one only if their school offers it and it fits their existing subject combination.
Ques: Is there a fixed number of MCQs in every CBSE Class 12 subject?
Ans: No. The exact split between MCQs, competency-based questions, and descriptive answers varies slightly by subject, though most papers now include a large share of competency-based and case-study questions.
Download the PREPP App and attempt FREE CBSE CLASS XII Mock Tests and get complete study material!
Comments