Grades are only half the story at the end of Secondary 4. What decides where a student goes next is the aggregate score, and the way that score is built catches a lot of families off guard. A student can have strong grades and still miss a course because of how the points were counted, or because they did not plan their subject mix with the scoring in mind.
This guide explains how O-Level points work in plain terms, then what the 2027 Singapore-Cambridge Secondary Education framework changes.
The basic idea: lower is better
O-Level aggregate scoring counts grades as points, where a better grade is a smaller number. An A1 is 1 point, and the number rises as the grade drops. You then add up a defined set of subjects, and a lower total is a stronger result.
The catch is which subjects count, and that depends on where the student is applying.
The three scores that matter
Different next steps use different combinations.
| Score | Used for | What it counts |
|---|---|---|
| L1R5 | Junior college, up to the 2027 admissions exercise | First language plus five relevant subjects (six subjects). JC requires 20 points or fewer |
| L1R4 | Junior college from 2028; Millennia Institute | One language plus four relevant subjects (five subjects). JC requires 16 points or fewer; MI requires 20 or fewer |
| ELR2B2 | Polytechnic Year 1 admission | English, two relevant subjects and two best subjects, in a course-specific way |
If your child is in Secondary 3 now, their JC score will be L1R4, not L1R5. The current Secondary 3 students started Secondary 1 in 2024, making them the first cohort under the new system, and they apply to JC in 2028.
L1R4 still requires subjects from both the Maths/Science group and the Humanities group, so a balanced combination still matters. What changes is the weight of each subject: with one fewer subject counted, every counting subject is a bigger share of the total. One weak result can no longer hide behind five good ones.
Why subject choice feeds the score
Because only certain subjects count, the combination you pick in Secondary 3 shapes the score you can reach. Two points families miss:
- A content-heavy combination is not automatically a better score. What matters is the grades you can realistically achieve in the subjects that count.
- Bonus points are subtracted, and the cap is shrinking. Bonus points, for example for CCA, are subtracted from the raw score to give the net aggregate. Under L1R4, the maximum bonus for JC admission falls from four points to three.
This is why the Pure versus Combined Science decision is also a scoring decision, not only a workload one. We cover that choice in Pure Physics vs Combined Science (Physics): which to choose.
What the 2027 SEC framework changes
The Singapore-Cambridge Secondary Education Certificate replaces the separate O-Level and N-Level certificates. Under full Subject-Based Banding, students take each subject at the level that fits them, G1, G2 or G3, and every subject appears on one SEC certificate. G3 is the current O-Level standard.
What that means for scoring:
- For JC, take your counting subjects at G3. G3 is the O-Level standard, so the subjects in your L1R4 should be taken at G3.
- For poly, there is a little more flexibility. From 2028, one of the two “best” subjects in ELR2B2 can be taken at G2 or G3, and MOE uses a grade mapping table to compare results across levels.
- Subject-combination choices carry more weight. More flexibility means more responsibility to plan the mix around the destination, which is why current Secondary 2 and 3 families need to think about this earlier than past cohorts did.
For current Sec 2 and Sec 3 families, we explain the transition in from Sec 2 to Sec 3 Physics: avoiding a six-month lag and new to Sec 3 G3 Physics.
What to do with this
- Work backwards from the destination. Decide the likely next step, find out which score it uses for your child’s intake year, and make sure the subject combination supports it.
- Treat every counting subject as high stakes. Under L1R4, each counting subject carries a bigger share of the total, so a single weak grade costs more than it used to.
- Keep the mix balanced. L1R4 still needs subjects from both the Maths/Science and Humanities groups.
- Plan early under SEC. The added flexibility only helps if the choices are deliberate.
If Physics is one of the subjects carrying your child’s aggregate, that is exactly where focused help moves the score. Explore our Secondary Physics programme or book a trial lesson to start.
Frequently asked questions
How are O-Level points counted? Grades convert to points, where a better grade is a smaller number. A defined set of subjects is added up and any bonus points are subtracted. A lower net total is stronger. Which subjects count depends on where you are applying and in which year.
What is the difference between L1R5 and L1R4? L1R5 counts six subjects (first language plus five relevant subjects) and is used for JC admission up to the 2027 exercise, with a cut-off of 20 points or fewer. L1R4 counts five subjects (one language plus four relevant subjects) and is used for JC admission from 2028, with a cut-off of 16 points or fewer, and for Millennia Institute, at 20 points or fewer.
Do bonus points still apply? Yes. Under L1R4, the maximum bonus for JC admission falls from four points to three.
How does the SEC framework change scoring? Subjects are taken at G1, G2 or G3 and all appear on one SEC certificate. For JC, counting subjects should be taken at G3, the O-Level standard. For poly, from 2028 one of the two best subjects in ELR2B2 can be taken at G2 or G3.