CBSE Class 12 Biology, Accountancy, Business Studies and Economics — Unit-wise Marks

This guide gives the unit-wise marks for CBSE Class 12 Biology and the three main Commerce subjects, taken from the official CBSE curriculum documents for 2026-27, so you can plan revision by weight without skipping chapters.

For Physics, Chemistry and Maths, see our separate PCM weightage guide. Always confirm on cbseacademic.nic.in before the exam.

Biology (theory 70 marks, 3 hours)

Genetics and Evolution: 20 marks, the heaviest unit.
Reproduction: 16 marks.
Biology and Human Welfare: 12 marks.
Biotechnology and its Applications: 12 marks.
Ecology and Environment: 10 marks.
The other 30 marks are for practicals. These chapters also form the core of NEET Biology.

Accountancy (80 marks + 20 project)

Accounting for Partnership Firms: 36 marks.
Accounting for Companies: 24 marks.
Analysis of Financial Statements: 12 marks, and Cash Flow Statement: 8 marks.
Instead of the financial statement analysis part, students may take Computerised Accounting (20 marks) with practical work.

Business Studies (80 marks + 20 project)

Part A – Principles and Functions of Management (50): Nature and Significance + Principles of Management 16; Business Environment + Planning 14; Organising, Staffing, Directing and Controlling 20.
Part B – Business Finance and Marketing (30): Financial Management + Financial Markets 15; Marketing + Consumer Protection 15.

Economics (80 marks + 20 project)

Introductory Macroeconomics (40): National Income 10, Money and Banking 6, Determination of Income and Employment 12, Government Budget 6, Balance of Payments 6.
Indian Economic Development (40): Development Experience and Reforms since 1991 12, Current Challenges facing the Indian Economy 20, Comparison with Neighbours 8.

How to use the weightage

Give the most time to the heaviest units: Genetics in Biology, Partnership in Accountancy, the management functions in Business Studies and Current Challenges in Economics.
Do not skip lighter units; every unit is examined.
In the Commerce curriculum files, the Class XII marks table is the same as the previous session; check the CBSE website for any notice of change before your exam.
See our CBSE Class 12 board exam guide for the study plan.

Frequently Asked Questions

What is the unit-wise weightage for CBSE Class 12 Biology?

In the official 2026-27 syllabus (theory 70 marks): Reproduction 16, Genetics and Evolution 20, Biology and Human Welfare 12, Biotechnology and its Applications 12, Ecology and Environment 10. Practicals carry 30 marks.

What is the marks distribution for CBSE Class 12 Accountancy?

Accounting for Partnership Firms 36, Accounting for Companies 24, Analysis of Financial Statements 12 and Cash Flow Statement 8, for 80 theory marks, plus 20 for project work. Computerised Accounting (20) can be taken instead of the financial statement analysis part.

Which part carries more marks in CBSE Class 12 Business Studies?

Part A, Principles and Functions of Management, carries 50 of the 80 theory marks; Part B, Business Finance and Marketing, carries 30. Project work is 20 marks.

How are CBSE Class 12 Economics marks divided?

Introductory Macroeconomics and Indian Economic Development carry 40 marks each in the 80-mark theory paper, with 20 marks for the project. Current Challenges facing the Indian Economy is the heaviest single unit at 20 marks.

Does WonderZ offer CBSE Class 12 Commerce and Biology tuition?

Yes. WonderZ Learning offers online CBSE Class 12 tuition in Biology, Accountancy, Business Studies and Economics for students in Kerala and the Gulf, with 1-on-1, small batch and app classes. Fees are flexible and negotiable, and you can book a free demo class.

Learn With WonderZ

WonderZ Learning offers 1-on-1, small batch and WonderZ App live + recorded classes for Kerala syllabus and CBSE students. Fees are flexible and negotiable, and every family can start with a free demo class.

Book a Free Demo Class · WhatsApp +91 62381 41038