The CBSE Marks Bifurcation 2027 circular is out. On 5 November 2026, the Central Board of Secondary Education (CBSE) released the subject-wise marks distribution for the Class 10 and Class 12 Board Examinations 2027. Every subject carries 100 marks. In most main subjects, you write an 80-mark theory paper and get 20 marks from internal assessment, while lab subjects such as Class 12 Physics, Chemistry and Biology are split into 70 theory marks and 30 practical marks. The circular also tells schools how long each theory paper is, whether CBSE will appoint an external examiner, whether the Board will give practical answer books, and which type of answer book you will get in the theory exam.
Below, you will find the subject-wise marks split for Class 10 and Class 12, the practical exam dates, the external examiner rules, and the steps to download the official CBSE PDF.
CBSE Marks Bifurcation 2027 Important Highlights
Here are the main details of the circular at a glance.
| Particulars | Details |
|---|---|
| Board | Central Board of Secondary Education (CBSE) |
| Circular Date | 5 November 2026 |
| Circular Number | CBSE/Coord/Marks distribution/163685/2026-2027 |
| Session | 2026-27 |
| Classes Covered | Class 10 and Class 12 |
| Maximum Marks | 100 marks per subject |
| Practical/Project/Internal Assessment | As applicable to the subject |
| Winter-Bound Schools | 9 November to 19 December 2026 |
| Regular-Session Schools | From 1 January 2027 (end date to be confirmed) |
| Official Website | cbse.gov.in |
Students can also check the latest updates on the CBSE Class 10 and 12 LOC Correction Window 2027, including correction dates and important instructions.
CBSE Practical Exam and Internal Assessment Dates 2027
The same circular also gives the dates for practical exams, project work and internal assessment for Classes 10 and 12.
The dates depend on whether your school follows the winter-bound session or the regular session, so check your school’s category and confirm the exact dates with your school.
| School Category | Practical Exam/Internal Assessment Dates |
|---|---|
| Winter-Bound Schools | 9 November 2026 to 19 December 2026 |
| Regular-Session Schools | From 1 January 2027 (end date to be confirmed) |
Important: These dates cover practical exams, project assessment and internal assessment for the 2027 board exams. For regular-session schools, the circular prints the end date as 13.12.2027, which looks like a typing error, and CBSE’s winter-bound circular of the same day says a separate circular will be issued for regular-session schools. So treat 1 January 2027 as the start date and confirm the end date with your school.
Students can also learn how to use CBSE Sample Papers and Marking Schemes 2026–27 effectively to practise questions, understand the marking pattern, and improve their exam scores.
CBSE Class 10 Marks Bifurcation 2027: Subject-Wise Distribution
Every Class 10 subject carries 100 marks, but the split between theory, practical, project, and internal assessment changes from subject to subject. In most language and academic subjects, you write an 80-mark theory paper and the remaining 20 marks come from internal assessment.
Home Science, Computer Applications and several skill subjects follow a different split. Here is the marks distribution for the main Class 10 subjects.
| Subject | Subject Code | Theory | Practical | Project | Internal Assessment | Total |
|---|---|---|---|---|---|---|
| English Language & Literature | 184 | 80 | – | – | 20 | 100 |
| Hindi Course-A | 002 | 80 | – | – | 20 | 100 |
| Mathematics Standard | 041 | 80 | – | – | 20 | 100 |
| Mathematics Basic | 241 | 80 | – | – | 20 | 100 |
| Science | 086 | 80 | – | – | 20 | 100 |
| Social Science | 087 | 80 | – | – | 20 | 100 |
| Home Science | 064 | 70 | 30 | – | – | 100 |
| Computer Applications | 165 | 50 | 50 | – | – | 100 |
| Information Technology | 402 | 50 | 50 | – | – | 100 |
| Artificial Intelligence | 417 | 50 | 50 | – | – | 100 |
| Elements of Business | 154 | 70 | – | 30 | – | 100 |
Source: CBSE Class X subject-wise marks distribution, Examination 2026-27. The table shows selected subjects; check the notification for the complete list.
Important Points About Class 10 Marks Distribution
- Mathematics: Both Standard and Basic Mathematics carry 80 theory marks and 20 internal assessment marks.
- Science: Students have to appear for an 80-mark theory examination, with 20 marks allocated to internal assessment.
- Social Science: The subject follows an 80:20 theory and internal assessment distribution.
- Computer Applications: The assessment is divided equally between theory and practical examinations, with 50 marks each.
- Home Science: The subject carries 70 theory marks and 30 practical marks.
So, in every Class 10 subject listed above, 20 to 50 marks come from work you do in school during the year. Keep your internal assessment and practical work up to date along with your theory preparation.
CBSE Class 12 Marks Bifurcation 2027: Subject-Wise Distribution
For Class 12, CBSE has provided the marks distribution for academic, language, science, commerce, humanities, and skill-based subjects.
In Class 12, many practical subjects are assessed by an external examiner appointed by CBSE. For example, Physics, Chemistry and Biology carry 70 theory marks and 30 practical marks. Mathematics and English Core follow an 80:20 distribution between theory and internal assessment.
Commerce subjects such as Business Studies, Accountancy and Economics have a 20-mark project in place of internal assessment. The CBSE Class 12 subject-wise marks distribution for 2027 is as follows:
| Subject | Subject Code | Theory | Practical | Project | Internal Assessment | Total |
|---|---|---|---|---|---|---|
| English Core | 301 | 80 | – | – | 20 | 100 |
| Mathematics | 041 | 80 | – | – | 20 | 100 |
| Physics | 042 | 70 | 30 | – | – | 100 |
| Chemistry | 043 | 70 | 30 | – | – | 100 |
| Biology | 044 | 70 | 30 | – | – | 100 |
| Geography | 029 | 70 | 30 | – | – | 100 |
| Psychology | 037 | 70 | 30 | – | – | 100 |
| Computer Science | 083 | 70 | 30 | – | – | 100 |
| Business Studies | 054 | 80 | – | 20 | – | 100 |
| Accountancy | 055 | 80 | – | 20 | – | 100 |
| Economics | 030 | 80 | – | 20 | – | 100 |
| Applied Mathematics | 241 | 80 | – | – | 20 | 100 |
| Informatics Practices | 065 | 70 | 30 | – | – | 100 |
| Entrepreneurship | 066 | 70 | – | – | 30 | 100 |
Source: CBSE Class XII subject-wise marks distribution, Examination 2026-27. Selected subjects are shown; students should check the official PDF for all subject codes and details.
Important Points About Class 12 Marks Distribution
The split changes from one Class 12 subject to another, so look at the pattern for each of your subjects.
- Physics, Chemistry and Biology: Each subject carries 70 theory marks and 30 practical marks. So prepare for the practical exam as seriously as the theory paper.
- Mathematics: The subject carries 80 marks for the theory examination and 20 marks for internal assessment.
- Business Studies and Accountancy: Both subjects have 80 theory marks and 20 project marks.
- Economics: Students have to appear for an 80-mark theory examination, while 20 marks are allocated to project work.
- Computer Science: The subject follows a 70:30 theory and practical distribution.
- Geography: The assessment includes 70 theory marks and 30 practical marks.
Check the split for each of your subjects in the official list before you plan your study time.
What Details Has CBSE Included in the Marks Bifurcation Notification?
Along with the marks split, the circular gives schools a set of details for every subject so that they can conduct exams and assessments correctly.
The notification includes the following information for each subject:
- Class: Whether the subject belongs to Class 10 or Class 12.
- Subject Code: The official identification code assigned to the subject.
- Subject Name: The name of the subject as recognised by CBSE.
- Maximum Theory Marks: The maximum marks allocated to the written examination.
- Maximum Practical Marks: The marks allocated to practical examinations, wherever applicable.
- Project Assessment: The maximum marks assigned to project work.
- Internal Assessment: The marks allocated to internal assessment.
- External Examiner: Whether CBSE will appoint an external examiner for practical or project assessments.
- Practical Answer Books: Whether the Board will provide practical answer books.
- Theory Answer Book Type: The type of answer book students will receive during theory examinations.
For you as a student, the most useful columns are the theory, practical, project and internal assessment marks. The other columns mainly help your school plan examiners and answer books.
Will CBSE Appoint External Examiners for Practical Exams in 2027?
In Class 12, CBSE will appoint external examiners for practical or project assessment in subjects such as Physics, Chemistry, Biology, Geography, Computer Science, Business Studies, Accountancy and Economics.
For subjects such as Mathematics and English Core, the notification specifies that an external practical examiner will not be appointed.
In Class 10, CBSE will not appoint an external examiner for any subject in the table above. Even Computer Applications, which has 50 practical marks, is assessed by the school’s own teachers. Schools should carefully check the subject-wise list before making arrangements for practical examinations and project assessments.
Why Has CBSE Released the Marks Bifurcation Circular 2027?
CBSE has explained that schools sometimes make mistakes while uploading marks for practical examinations, project assessments, and internal assessments. The circular is meant to reduce these errors.
The main purposes of issuing this notification are:
- Awareness of Marks Distribution: Students and schools can understand the maximum marks assigned to theory, practical, project, and internal assessment components.
- Time for Theory Papers: Students know the maximum time allowed for each theory paper, so they can practise finishing within that time.
- Correct Marks Uploading: Teachers and examiners can check the maximum marks before awarding and uploading assessment scores.
- Clarity About Examiner Appointment: Schools can identify whether CBSE will appoint external examiners or whether they need to arrange their own teachers.
- Proper Answer Book Arrangements: Schools can understand the practical answer book requirements and the Board can avoid incorrect answer book distribution during theory examinations.
CBSE has also advised schools and other concerned stakeholders to take note of the information to avoid inconvenience for students at later stages. Students can also check the CBSE Class 10 Passing Criteria 2026–27 to understand the 33% aggregate passing rule and how theory and internal assessment marks are combined.
Important Instructions for Schools and Teachers
CBSE wants practical, project and internal assessment marks uploaded without mistakes, so that no request to change the uploaded marks has to be made later.
Teachers working as internal or external examiners should be aware of the maximum marks assigned to each component. Marks must be awarded and uploaded according to the prescribed distribution.
Schools should also check whether an external examiner will be appointed by CBSE or whether they need to conduct the assessment by appointing their own teachers. This saves students from trouble at later stages.
How to Download CBSE Marks Bifurcation Notification 2027?
Students, parents, and schools can download the official CBSE marks bifurcation notification for Classes 10 and 12 from the CBSE website.
Follow these steps to download the notification:
- Visit the official CBSE website at cbse.gov.in.
- Open the latest notifications or circulars section.
- Find the circular dated 05.11.2026, No. CBSE/Coord/Marks distribution/163685/2026-2027.
- Open the notification PDF.
- Check the subject-wise marks distribution for your class.
- Click the download option to save the notification for future reference.
Read the full notification: CBSE Marks Bifurcation 2027 for Class 10 & 12.
What Should Students Do After the CBSE Marks Bifurcation Notification?
If you are appearing for the CBSE Class 10 or 12 Board Examinations 2027, first check the marks split for each of your subjects. Then follow these steps:
- Check the theory examination marks for every subject.
- Understand the weightage of practical, project, and internal assessment components.
- Complete practical files, projects, and internal assessment work within the school deadlines.
- Prepare according to the marks allocated to the theory examination.
- Confirm practical examination dates with the school.
- Follow the latest instructions from CBSE and your school.
Remember that practical, project and internal assessment marks add straight into your final subject score. Up to 30 marks in a Class 12 science subject and up to 50 marks in some Class 10 skill subjects come from this work, so finish your files and projects on time.
Also Read:
- CBSE Class 10 Sample Question Papers & Marking Schemes 2026-27 Released: Download PDFs
- CBSE Class 12 Sample Question Papers & Marking Schemes 2026-27 Released: Download PDFs
Key Takeaway
Every CBSE subject for 2027 is marked out of 100, and in each subject listed above, at least 20 marks come from practical, project, or internal assessment work done in your school. So open the official list today, note the split for each of your subjects, and ask your teacher for your practical and project deadlines.
FAQs
Yes, CBSE released the subject-wise marks distribution circular on 5 November 2026 for Class 10 and Class 12 examinations 2027.
Every Class 10 subject carries 100 marks. Main subjects such as English, Hindi, Mathematics, Science and Social Science are split into 80 theory marks and 20 internal assessment marks, while Home Science and Computer Applications have practical marks.
Physics, Chemistry, and Biology each carry 100 marks, divided into 70 theory marks and 30 practical examination marks.
Winter-bound schools will hold practicals from 9 November to 19 December 2026. Regular-session schools start on 1 January 2027. The circular prints the end date as 13.12.2027, so confirm the final date with your school.
Yes. CBSE will appoint external examiners for subjects such as Physics, Chemistry, Biology, Geography, Computer Science, Business Studies, Accountancy and Economics.
20 marks. Both Mathematics Standard and Mathematics Basic have an 80-mark theory paper and 20 marks of internal assessment.
Business Studies and Accountancy each carry 80 theory marks and 20 project marks, making the total assessment 100 marks.
Students can download the official notification from the CBSE website, cbse.gov.in, or directly access the PDF through the official circular link.
It explains subject-wise marks distribution, practical requirements, internal assessment weightage, and examiner appointments, helping students prepare and schools conduct assessments correctly.
