CBSE has issued its subject-wise marks breakup for the 2026-27 session, explaining how the total 100 marks are divided between theory exams, practicals, projects and internal assessments for Class 10 and Class 12. The circular, titled “Subject-wise Marks Bifurcation of Class X/XII, 2026-27“, appeared on cbse.gov.in on November 6, 2026.If you are preparing for the 2027 board exams, this breakdown will help you understand how much weightage your written exam carries and how the remaining marks will be awarded.
Key Facts Box
- CBSE listed the circular “Subject-wise Marks Bifurcation of Class X/XII, 2026-27” on cbse.gov.in on November 6, 2026.
- Most Class 10 subjects, including Mathematics Standard and Basic, are reported as 80 marks theory and 20 marks internal assessment.
- Class 12 Physics, Chemistry and Biology are reported as 70 marks theory and 30 marks practical.
- Class 12 Economics, Business Studies and Accountancy are reported as 80 marks theory and 20 marks project work.
- Practicals and internal assessment for regular schools run from January 1 to February 13, 2027.
- Winter-bound schools hold theirs from November 9 to December 19, 2026.
- Subject splits below come from news coverage of the circular. Confirm your own subject on cbse.gov.in.
How Are CBSE Class 10 Marks Divided in 2027?
Most Class 10 subjects carry 80 marks for the board theory paper and 20 for internal assessment. That includes both Mathematics Standard and Mathematics Basic.
A few subjects break the pattern. Computer Applications is reported at 50 theory and 50 practical, Home Science at 70 and 30, and Elements of Business at 70 theory and 30 project work. Painting is split three ways: 30 theory, 50 practical and 20 internal assessment.
CBSE Class 12 Marks Distribution 2027
The science papers give practicals a big share. Physics, Chemistry and Biology are each reported as 70 marks theory and 30 marks practical, and Computer Science, Geography and Psychology follow the same 70/30 split.
Commerce and Mathematics lean harder on the written paper. Economics, Business Studies and Accountancy are reported at 80 theory and 20 project work, and Class 12 Mathematics at 80 theory and 20 internal assessment. Vocational subjects have their own allocations, so check the circular for those.
When Are the Practical Exams and Internal Assessments?
For regular schools, practicals, projects and internal assessment run from January 1, 2027 to February 13, 2027, which is just before the theory papers start on February 16. Your school sets its own day inside that window.
Winter-bound schools go earlier, from November 9 to December 19, 2026, because snow and cold make a January schedule unworkable.
What This Means for Students
Practical and internal marks are the easiest marks to protect. A student who writes a 65 out of 80 in Maths but loses five marks in internal assessment ends up well below where the paper suggests.
Schools must upload practical, project and internal assessment marks along with theory marks, and CBSE has asked them to tell students the maximum marks per subject and the maximum practical time in advance. Ask your teacher for both, in writing if possible.
FAQs
Q. What is the theory and practical marks split for CBSE Class 12 Physics 2027?
Ans. Class 12 Physics is reported as 70 marks theory and 30 marks practical. Chemistry and Biology follow the same split.
Q. How many internal assessment marks are there in CBSE Class 10 Maths 2027?
Ans. Class 10 Mathematics, both Standard and Basic, carries 20 marks internal assessment and 80 marks theory.
Q. When will CBSE practical exams 2027 be held?
Ans. Practicals for regular schools run from January 1 to February 13, 2027. Winter-bound schools hold them from November 9 to December 19, 2026.
Q. Where can I check the CBSE marks bifurcation circular?
Ans. The circular is listed under “Latest @ CBSE” on cbse.gov.in with the date November 6, 2026. Open the PDF to see every subject code.
To view CBSE Subject-wise Marks Bifurcation Circular Click here
Next Steps
Open the CBSE marks breakup circular, find each of your subjects, and note how much of the 100 marks sits outside the theory paper. Ask your school for its practical schedule now, and check back here for updates on admit cards and exam notices.