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CBSE marks bifurcation 2027: Class 10, 12 theory, practical split
CBSE has published the subject-wise marks bifurcation for the Class 10 and 12 board examinations of 2027. Most Class 10 subjects are 80:20, the sciences in Class 12 are 70:30 — check the split for your subjects on cbse.gov.in.
⚡Key Highlights
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CBSE has published the subject-wise marks bifurcation for the Class 10 and 12 board examinations of 2027
Most Class 10 subjects are 80:20, the sciences in Class 12 are 70:30 — check the split for your subjects on cbse.gov.in.
Key analysis, background details, and full reporting below.
The Central Board of Secondary Education has published the subject-wise marks split for the Class 10 and Class 12 board examinations of 2027, showing how each subject divides marks between theory, practicals and internal assessment.
By StoryTimesNow News Desk — 07 November 2026, 9:03 PM IST
CBSE has released the subject-wise marks bifurcation for the Class 10 and 12 board examinations of 2027. (Illustration: StoryTimesNow)
Key Takeaways
CBSE published the subject-wise marks bifurcation for the Class 10 and Class 12 board examinations of 2027 in a circular dated 6 November 2026.
Most Class 10 subjects follow an 80:20 split — 80 marks for theory and 20 for internal assessment; Computer Applications is 50:50 and Home Science is 70:30.
In Class 12, Physics, Chemistry, Biology and Computer Science follow a 70:30 theory-to-practical split, while most other subjects are 80:20.
The board examinations begin on 16 February 2027; the official subject-wise PDF is on cbse.gov.in.
Introduction
The Central Board of Secondary Education (CBSE) has released the subject-wise marks bifurcation for the Class 10 and Class 12 board examinations of 2027. The circular, dated 6 November 2026 and titled "Circular regarding Subject-wise Marks Bifurcation of Class X/XII, Examination 2026-27", sets out how marks are divided between theory, practicals, projects and internal assessment for every subject.
For the lakhs of students who will sit the examinations, the document settles the most practical question of the year: how much of the final score in each subject comes from the written paper, and how much from practicals or internal assessment. The board examinations begin on Tuesday, 16 February 2027.
What Happened?
CBSE published the subject-wise marks distribution for 2026-27 on cbse.gov.in on 6 November 2026. The circular lists, against each subject, the marks for theory, practical, project and internal assessment.
The release came the same day the board published the date sheets for the 2027 examinations. Together, the two documents give students the full picture for the year ahead: when each paper falls, and how it will be marked.
News of the bifurcation spread quickly on Friday, 7 November, as education portals carried the subject-wise details.
Why Does This Matter?
The split changes how students should divide their preparation time. In a subject where 30 marks ride on practical work, the laboratory record, viva and practical examination carry nearly a third of the final score — time spent only on theory would leave marks on the table. It also matters for schools, which conduct the practicals and internal assessments: the circular tells them which subjects need an external examiner and how long each theory paper runs.
Finally, the official document ends the guesswork. Marks-split charts circulate on social media every year before the board publishes its circular, and students who plan around an unverified chart risk preparing for the wrong weightage. The PDF on cbse.gov.in is the only version that counts.
Important Details
Class 10 marks distribution (2026-27):
Subject group
Theory
Internal assessment / practical
Most major subjects — English, Hindi Course A and B, Mathematics, Science, Social Science
80
20 (internal assessment)
Computer Applications
50
50 (practical)
Home Science
70
30 (practical)
Class 12 marks distribution (2026-27):
Subject group
Theory
Practical / project
Physics, Chemistry, Biology, Computer Science
70
30 (practical)
Mathematics, Economics, History, Political Science, Business Studies, Accountancy
80
20 (project work or internal assessment)
No external practical examiner is appointed for Class 10 language subjects. Students should check the official document, not assume the same pattern applies to every subject — the split varies, and similarly named subjects can carry different weightages.
Background and Context
CBSE conducts the board examinations for its affiliated schools in India and abroad, publishing a subject-wise marks bifurcation alongside the date sheet each year.
The 2027 schedule follows the board's established pattern of beginning the main examinations in mid-February. Class 10 examinations run from 16 February to 9 March 2027, and Class 12 examinations continue until 9 April, with every theory paper starting at 10:30 am. Practicals run from 1 January to 13 February 2027 in most schools, and from 9 November to 19 December 2026 in winter-bound schools.
What Happens Next?
Schools will now run practical examinations in the announced windows, and students should confirm their practical dates and batches with their school. Admit cards will follow closer to the examinations. Until then, the marks bifurcation PDF and the date sheet are the two planning references — and any split or date on social media that does not match them should be treated as unverified.
What Readers Should Know
To download the official marks bifurcation, visit cbse.gov.in, open the latest notifications or examination circulars section, and look for the circular titled "Circular regarding Subject-wise Marks Bifurcation of Class X/XII, Examination 2026-27". Check the split against your subject code, not just the subject name.
FAQs
When do the CBSE Class 10 and 12 board exams 2027 start?
Tuesday, 16 February 2027. Class 10 ends on 9 March and Class 12 on 9 April; all theory papers start at 10:30 am.
Where can I download the CBSE marks bifurcation PDF 2027?
On cbse.gov.in, in the latest notifications or examination circulars section, under the circular titled "Circular regarding Subject-wise Marks Bifurcation of Class X/XII, Examination 2026-27".
Is the marks split the same for every subject?
No. Most Class 10 subjects are 80:20, but Computer Applications is 50:50 and Home Science is 70:30. In Class 12, the sciences are generally 70:30 while most other subjects are 80:20. Check the official PDF for your subject.
Sources and Verification
All marks splits are from the CBSE circular dated 6 November 2026, as reported by the sources below on 7 November 2026; the examination dates are from the CBSE date sheets published on 6 November 2026.
Economic Times — CBSE Marks Bifurcation 2027 (7 November 2026)
Business Today — CBSE class 10, 12 marks bifurcation 2027 (7 November 2026)
Shiksha — CBSE Marks Bifurcation 2027: subject-wise theory, practical marks (updated 7 November 2026)
CareerIndia — CBSE Marks Bifurcation 2027: theory and practical marks (7 November 2026)
Kasba — CBSE Class 10, 12 Exam 2026-27: theory, practical and internal marks (citing the CBSE circular of 6 November 2026)
The marks splits in this article are from CBSE's circular dated 6 November 2026; the PDF on cbse.gov.in is the final authority. Splits vary by subject, so students should confirm the figures against their own subject codes.
