The GCE O-Level is Singapore's national exam at the end of secondary school, set by SEAB with Cambridge and graded A1 (best) to F9. Express students took it in Sec 4 and Normal (Academic) students in Sec 5. The final sitting is in 2026. From 2027, Sec 4 students sit the Singapore-Cambridge SEC instead, and G3 keeps the O-Level standard.
- Mid-year 2026Mother Tongue written papers
- Mid-October to mid-November 2026Other written papers
- 17 to 21 December 2026N(A) and N(T)-Level resultsTentative
- 13 to 15 January 2027O-Level resultsTentative. Schools confirm the day and time
- 20272027 JAE on L1R5The final O-Level cohort applies to JC, MI and polytechnic
- 2027First SEC examResults in January 2028
Results dates are from MOE's national examinations dates page. The results calendar for every 2026 exam, including the PSLE and A-Level, is in our O-Level results release date table.
The O-Level grading system (A1 to F9)
| Grade | Meaning |
|---|---|
| A1, A2 | Distinction-level passes |
| B3, B4 | Strong passes |
| C5, C6 | Credit passes |
| D7, E8 | Passes below credit level |
| F9 | Fail |
A lower number is better, and each grade's number is its point value: A1 is 1 point, F9 is 9. That is how the L1R5 aggregate below is added up.
The L1R5 score
Junior College admission uses the L1R5 aggregate: a first language, English or Higher Mother Tongue (L1), plus five relevant subjects (R5). The six point values are added, and a lower total is better. To be eligible for a JC in the 2027 JAE, the gross L1R5 must be 20 or below.
Every grade band matters. A B3 instead of an A2 in one subject costs one point, and at a competitive JC one point can decide a place. Bonus points, such as those for CCA records under LEAPS 2.0 or for choosing an affiliated JC, are subtracted and can shift a borderline application.
Polytechnic diplomas use ELR2B2: English, two relevant subjects and the two best other subjects. In the 2027 JAE the ELR2B2 net aggregate must not exceed 26 (28 for the Diploma in Nursing). Check which subjects your child's target course treats as relevant.
The score decides which doors are open. Your child's learning style should decide which one they walk through. Work out an aggregate with our L1R5 and L1R4 calculator.
O-Level subjects: Pure or Combined, with or without A-Math
Every combination includes English, Mother Tongue, Elementary Mathematics (4052), a humanities subject and a science, which MOE lists as compulsory at upper secondary. Two choices shape the combination.
| Point | Pure sciences | Combined Science |
|---|---|---|
| What it is | Physics, Chemistry or Biology, each with its own grade | Two sciences in one grade (5086, 5087 or 5088) |
| Depth | More depth per science | Lighter load |
| Suits | The JC science track | Students whose strengths lie elsewhere |
Additional Mathematics (4049) is the deeper Maths option, covering calculus and advanced algebra, for students heading to the JC science track or engineering at Polytechnic. The usual combinations:
- Double pure science with A-Math, for example Physics and Chemistry. A direct route to JC science subjects.
- Combined Science with A-Math. A lighter science load that keeps H2 Mathematics open in JC.
- Combined Science without A-Math. Suits humanities, arts and many polytechnic pathways.
Our Sec 1 guide to O-Level subject combinations explains how Sec 1 and Sec 2 results decide which combinations stay open. For one-to-one help, see our A-Math tuition and O-Level Chemistry tuition.
O-Level syllabus codes (2026) and the SEC codes from 2027
| Subject | O-Level code (2026) | SEC G3 code (2027) |
|---|---|---|
| English Language | 1184 | K300 |
| Mathematics (E-Math) | 4052 | K310 |
| Additional Mathematics | 4049 | K341 |
| Physics | 6091 | K323 |
| Chemistry | 6092 | K324 |
| Biology | 6093 | K325 |
| Science (Physics, Chemistry) | 5086 | K326 |
| Science (Physics, Biology) | 5087 | K327 |
| Science (Chemistry, Biology) | 5088 | K328 |
SEAB lists every 2026 code, including humanities and Mother Tongue, on its 2026 O-Level syllabus page. Its 2027 G3 syllabus list shows each K-code next to the former code. Our SEC syllabus codes guide has the full list.
The Sec 3-4 timeline
- Sec 3Learn the larger share of the syllabus. It is examined in full, so it is not a warm-up year
- Sec 4 Terms 1 to 2Finish the syllabus and start past-paper work
- Sec 4 Term 3Prelims and timed papers
The two moves that matter most: keep pace in Sec 3 so Sec 4 can be a drilling year, and practise on real school prelim papers, which generally run harder than the actual O-Level paper.
O-Levels after 2026: the SEC transition
The 2026 sitting is the final GCE O-Level. From 2027, Sec 4 students sit the SEC under Full Subject-Based Banding, which replaced the Express, Normal (Academic) and Normal (Technical) streams.
- Grading: G3 subjects, the former O-Level standard, keep the A1 to 9 scale, so the grading above still applies at G3.
- One certificate: a single SEC lists every subject and the level (G1, G2 or G3) it was taken at, replacing the separate O-Level and N-Level certificates.
- JC admission: the first SEC cohort applies in the 2028 Post-Secondary Admissions Exercise (PSE) using L1R4 instead of L1R5.
The full breakdown is in The SEC in 2027: What Replaces the O-Level, Explained.
Common questions
What is a good L1R5 score?
To be eligible for a junior college in the 2027 JAE, the gross L1R5 must be 20 or below. Each JC's actual cut-off depends on that year's results and choices, and MOE's SchoolFinder shows the latest net aggregate ranges.
When are the 2026 O-Level results released?
MOE lists them tentatively for Wednesday 13 to Friday 15 January 2027. Schools confirm the exact day and time.
Should my child take Pure or Combined Science?
If they are aiming at the JC science track or a science-related degree, Pure is usually the expected route. If their strengths lie elsewhere, Combined Science is a sound choice and frees time for other subjects.
Is the O-Level the only route to JC?
It is the main one, but a strong Sec 4 student may also get a place through Direct School Admission. Integrated Programme students skip the O-Level and go straight on to the A-Level.
How early should a student start O-Level preparation?
From Sec 3, by keeping pace with the syllabus as it is taught. Dedicated past-paper work usually starts at the beginning of Sec 4.
Written by Dion Tan, Chemistry & Science Tutor, The Singapore Syllabus. MSc (NUS), BSc Chemistry & Biological Chemistry (NTU) · 10 years' teaching experience. More about Dion
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