CBSE Marks Bifurcation 2027: Class 10 and 12 Subject-Wise Theory Practical Marks

CBSE Marks Bifurcation 2027: Complete Subject-Wise Theory and Practical Marks for Class 10 and 12

CBSE has released the subject-wise marks bifurcation for Class 10 and Class 12 board exams 2027. The circular was issued on 5 November 2026. Every subject carries a total of 100 marks. The split between theory, practical, project and internal assessment is different for different subjects.

This marks distribution helps students plan their preparation. It shows how much weight is given to the board exam paper and how much comes from school-based assessment.

Class 10 Marks Bifurcation 2027

Most major subjects in Class 10 follow an 80 + 20 pattern. Theory exam is of 80 marks and internal assessment is of 20 marks.

Main subjects with 80 theory + 20 internal assessment:

English Language and Literature
Hindi Course A and Hindi Course B
Mathematics Standard
Mathematics Basic
Science
Social Science

Some subjects have different splits:

Home Science: 70 theory + 30 practical
Computer Applications: 50 theory + 50 practical
Painting: 30 theory + 50 practical + 20 internal assessment
Elements of Business: 70 theory + 30 project

The 20-mark internal assessment usually includes periodic tests, multiple assessments, portfolio and subject enrichment activities.

Class 12 Marks Bifurcation 2027

In Class 12, the pattern depends on the stream and subject.

Science subjects (70 theory + 30 practical):

Physics
Chemistry
Biology
Computer Science
Geography
Psychology

Subjects with 80 theory + 20 project or internal assessment:

Mathematics: 80 theory + 20 internal assessment
English Core: 80 theory + 20 internal assessment
Economics: 80 theory + 20 project
Business Studies: 80 theory + 20 project
Accountancy: 80 theory + 20 project
History: 80 theory + 20 project
Political Science: 80 theory + 20 project

Vocational and skill subjects have different ratios such as 60:40 or 50:50.

What is Internal Assessment?

Internal assessment is conducted by the school. It is not a single test. For Class 10, the 20 marks usually come from:

Periodic tests
Multiple assessments
Portfolio
Subject enrichment activities

For Class 12 science practicals, the 30 marks include experiments, records, project and viva.

Passing Criteria

Students need 33 percent marks in each subject to pass. Theory and internal assessment or practical marks are combined. There is no separate minimum in theory or practical for most subjects.

Practical Exam Schedule

Winter-bound schools will conduct practicals from 9 November to 19 December 2026. Regular session schools will conduct them from 1 January 2027 onwards.

Why This Matters for Students

Knowing the exact marks split helps students focus correctly. In subjects with 80-mark theory, the board exam is more important. In subjects with 30-mark practical, lab work and practical preparation also matter a lot.

Students should check the official CBSE circular for the complete subject-wise list and subject codes.

Frequently Asked Questions

What is the marks split in most Class 10 subjects?
80 marks theory + 20 marks internal assessment.

What is the split for Physics, Chemistry and Biology in Class 12?
70 marks theory + 30 marks practical.

How many marks are needed to pass?
33 percent in each subject (theory + practical/internal combined).

When will practical exams be held?
Winter-bound schools: 9 November to 19 December 2026. Regular schools: from 1 January 2027.

Where can I check the official circular?
On the CBSE official website cbse.gov.in.

Conclusion

CBSE Marks Bifurcation 2027 is clear and subject-specific. Class 10 major subjects are mostly 80:20, while Class 12 science subjects are 70:30. Students should note the exact split for their subjects and prepare accordingly. Internal assessment and practicals are important parts of the total marks, so regular school work should not be ignored.