CBSE Passing Marks for Class 10 and 12: The 33% Rule Explained

A Class 10 student with 20 in the board paper and 15 in internals has 35 and passes. A Class 12 student with 20 out of 70 in theory and 30 out of 30 in practicals has 50 and still fails.

TL;DR

• Class 10: 33 out of 100 per subject, board exam and internal assessment added together.
• Class 12: at least 33% in theory and at least 33% in practical or internal assessment, each on its own.
• Class 10 students who fail a subject take the second board exam in May; Class 12 students take the supplementary exam in July.
• Grace marks are not a published right. Plan to cross 33% on your own.

What are the CBSE passing marks for Class 10?

Each main subject is 100 marks: 80 for the board exam and 20 for internal assessment, which your school awards through periodic tests, notebooks and activities. You pass the subject when the two together reach 33. There is no separate minimum of 27 out of 80 in the board paper, though many websites still print one.

Internal assessment is not optional. CBSE has said a result cannot be declared without it, and the board has tied eligibility for the 2026-27 exams to 75% attendance. A student who skips the school's internal tests risks more than marks.

For Class 10, the 33% is counted on the combined 100, and the internal 20 must be on record.

What are the CBSE passing marks for Class 12?

Class 12 is stricter. In a subject with practicals, such as Physics, Chemistry or Biology, the paper is usually 70 marks of theory and 30 of practicals. You need about 23 out of 70 in theory and at least 10 out of 30 in practicals, as well as 33 overall. In subjects split 80 and 20, the minimums are 27 out of 80 and 7 out of 20.

A student who scores 22 out of 70 in Chemistry theory fails the subject even with full marks in the practical. The result sheet shows this as a repeat in theory, and only the theory paper has to be written again.

In Class 12, each part must reach 33% on its own; a strong practical cannot cover a weak theory paper.

What happens if a Class 10 student fails a subject?

From 2026, Class 10 has two board exams. The first is in February and March; the second, optional one is in May. A student who fails a subject in the first exam is placed in the compartment category and can clear it in the second exam. A student who passed can use the same May exam to improve up to three main subjects, and the better score counts.

The first year of this scheme was busy. Reports put registrations for the May 2026 exam at about 6.68 lakh: 85,285 for compartment, 5,25,655 for improvement and 57,914 for both. One rule catches students out: missing three or more subjects in the first exam makes a student ineligible for the second.

For Class 10, the May board exam is the second chance, for both compartment and improvement.

What happens if a Class 12 student fails a subject?

Class 12 students placed in the compartment category write the supplementary exam, held in July. Pass it and the result is updated for the same year, so college admission is not lost. Fail it, and the student writes the subject again in the next main exam, either through school or as a private candidate.

The exact number of subjects allowed and the dates are set in CBSE's supplementary circular each year, published on cbse.gov.in after the main results. Read it the day it comes out, because the application window is short.

Class 12 has one more chance in July; after that, the subject goes to the next year's main exam.

Can grace marks help you pass?

CBSE does not publish a fixed grace-mark rule that a student can count on. The board moderates results, and a student a mark or two short is sometimes moved up, but nobody can tell you in advance whether that will apply to your paper. I would treat any talk of grace marks as a reason to aim higher, not as a plan.

Grace marks exist, but they are not promised; plan to reach 33% without them.

How to make sure you cross 33% in every subject

1. Find your weakest subject from the half-yearly or pre-board result, not from how you feel about it.
2. In that subject, list the chapters that carry the most marks and finish those first. Our board exam dates 2027 post shows how much time is left.
3. Write every answer in steps. Examiners give marks for each correct step even when the final answer is wrong, as our post on step marking in board exams explains.
4. Class 12 students: give theory its own revision time even if the practical file is complete.
5. Write at least two full papers by hand before the exam and have them checked by someone strict.

In the board papers I check, the marks often go missing in a subject everyone assumed was safe, while the feared subject, usually Maths, got the most practice. A checked full paper shows this early.

Gradehunt's CBSE Class 10 test series and CBSE Class 12 test series give you full board-pattern papers that you write by hand and upload. Subject experts check them within 48 hours, with step-wise marks and comments on where marks were lost. The first paper is checked free, and mentorship plans are available.