The SEC Explained: Singapore's New Exam Replacing the O-Level in 2027

The last GCE O-Level is sat in October and November 2026. From 2027, the O-Level and N-Level are replaced by one national exam, the Singapore-Cambridge Secondary Education Certificate (SEC). The content your child learns and the way JCs and polytechnics read results stay broadly the same. What changes is the certificate and how each subject's level is shown.

What changes, and what stays the same

The SEC is the exam half of Full Subject-Based Banding, which has already replaced the Express, Normal (Academic) and Normal (Technical) streams. A child can now take each subject at the level that fits, and the old O-Level and N-Level split could not show that mix on one certificate.

The levels map onto the old streams:

• G3 is roughly the old Express standard. A G3 Mathematics paper covers what Express O-Level Mathematics covered.
• G2 is roughly the old Normal (Academic) standard.
• G1 is roughly the old Normal (Technical) standard, with the most support built in.

A student can mix levels, for example three subjects at G3 and one at G2. Our glossary explains each term.

How to prepare for the SEC

Because the content is stable, the study plan does not change. The one new decision is the level for each subject. Base it on real strength and the course your child is aiming for. A JC science track needs the core subjects at G3. A weaker subject taken at G2 can protect the overall result.

The common mistake is treating Sec 4 as the year to learn the content. By then it should be the year to drill it. School prelim papers generally run harder than the national paper, so they make good practice.

If your child needs help with a G3 paper, see our E-Math tuition, A-Math tuition and Combined Science tuition.

How posting to JC and Poly is affected

The final O-Level cohort applies through the 2027 JAE under the current rules. The first SEC cohort applies through the 2028 Post-Secondary Admissions Exercise (PSE), which replaces the JAE.

From 2028, Millennia Institute uses the same L1R4 subjects with a cap of 20, and up to 3 bonus points (plus 2 for a language elective programme) come off the JC or MI aggregate. Minimum grades for JC: English A1 to C6, Mathematics A1 to D7, Mother Tongue at G3 A1 to D7 (G2 grade 1 to 5, or G1 grade A to D), or Higher Mother Tongue A1 to E8. Each polytechnic course still sets its own cut-off.

At a 16-point cap, one grade can decide a place. Lifting the weakest counted subject by one grade is the most useful habit. MOE sets out the full criteria on its changes from 2028 page.

SEC 2027 exam dates

Every student sits on one shared timetable, whatever levels they take. Orals, listening and practicals come first.

SEAB publishes the paper-by-paper timetable each year on its SEC page.

O-Level results release date: 13 to 15 January 2027

The final GCE O-Level runs in October and November 2026. Schools confirm the exact day and time of the results release.

Is there Sec 5 in 2027?

Yes, for students who qualify. The last Normal (Academic) cohort entered Sec 1 in 2023 and sits the N-Level in 2026. Those who are eligible and choose a fifth year take Sec 5 in 2027, and since the O-Level ends in 2026, they sit the SEC that year. Eligibility is decided by MOE and the school, so check with your child's school. Source: MOE, Full Subject-Based Banding FAQ.

Which cohort is my child in?

• Entered Sec 1 in 2023 (Sec 4 in 2026). Final O-Level cohort. Papers, grading and the 2027 JAE on L1R5 do not change.
• Entered Sec 1 in 2024 (Sec 4 in 2027). First SEC cohort. The content carries over. The certificate name and paper codes change.
• Entered Sec 1 in 2025 or 2026. Sits the SEC and, on the JC route, is admitted under L1R4. The subject levels confirmed at the end of Sec 2 matter more than they used to.
• Sitting the PSLE in 2026 or later. Starts Sec 1 in 2027 under Full Subject-Based Banding and will sit the SEC.

If your child sits the final O-Level in November 2026

Nothing changes for this cohort. The paper format, syllabus, grading, certificate and the 2027 JAE all run as in previous years.

A retake after 2026 sits in a system that has moved to the SEC, with arrangements set by SEAB and MOE, so treat this sitting as the one that counts. In the final weeks, do full timed papers rather than reading notes, mark honestly against the mark scheme, and lift the weakest counted subject first. The L1R5 total does not care which subject a grade came from.