Is O-Level replaced by SEC in Singapore?

SEAB says the GCE N(T), N(A), and O-Level examinations will be combined and renamed as the Singapore-Cambridge Secondary Education Certificate from 2027.

Is N-Level replaced by SEC in Singapore?

Yes, under SEAB's 2027 SEC structure, the current GCE N(T) and N(A) examination labels are combined into the Singapore-Cambridge Secondary Education Certificate.

What is the difference between O-Level and SEC G3?

G3 is the SEC subject level closest to today's O-Level subject level. SEC is the 2027 certificate framework, while O-Level is the older examination label.

Should 2026 candidates follow SEC or O-Level/N-Level pages?

Follow the current 2026 O-Level or N-Level calendars and syllabuses if you are sitting the 2026 examinations. Use SEC pages to understand what changes for later cohorts.

Will SEC change science practicals?

SEAB says non-written examinations such as science practicals will continue before written examinations, as per current practice. Check the official SEC syllabus pages for subject-specific details.

When are the 2027 SEC exams?

When this page was checked on 21 October 2026, SEAB's Important Dates page listed only the 2026 examinations. SEAB has said that English Language and Mother Tongue written papers will be in September and the other written subjects from October to November.

O-Level and N-Level to SEC: What Changes in 2027?

Study guide30 May 2026, 00:00 ZUpdated 21 Oct 2026

Reviewed by

Marcus Pang·Managing Director (Maths)

Clear comparison of Singapore's O-Level and N-Level transition to the Singapore-Cambridge Secondary Education Certificate (SEC) from 2027, with G1/G2/G3 and science practical li...

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O-Level and N-Level search terms still matter in 2026. From 2027, the national secondary examination certificate is the Singapore-Cambridge Secondary Education Certificate (SEC). SEAB says the GCE N(T), N(A), and O-Level examinations will be combined and renamed as SEC, with subjects taken at G1, G2, or G3 levels.

The practical takeaway is simple: keep using O-Level and N-Level pages for 2026 dates, results, subject codes, and practical prep. Use SEC wording for younger cohorts preparing for the 2027 system.

Looking for the O-Level results date? The 2026 O-Level results (released in 2027) are tentatively due between Wednesday, 13 January and Friday, 15 January 2027, according to SEAB and MOE. See O-Level results release date 2027.

O-Level and N-Level names are being replaced by SEC from 2027: Do not rename your 2026 revision plan if you are sitting the 2026 exams.
SEC uses G1, G2, and G3 subject levels, with one certificate showing the subjects and levels taken: Learn the new terms, but keep the current O-Level or N-Level page for current-year dates.
The transition affects wording, certificate structure, results timing, and how families search: Use this comparison, then read the full SEC explainer: https://eclatinstitute.sg/blog/secondary-education-certificate-sec-singapore-2027.

Before 2027 and from 2027

Question

2026 and before

Sources

Add Eclat Institute as a Preferred Source on Google.

If you are searching for...	Start here
O-Level Physics 6091 Paper 3	https://eclatinstitute.sg/blog/o-level-physics-experiments
O-Level Chemistry 6092 Paper 3	https://eclatinstitute.sg/blog/o-level-chemistry-experiments
O-Level Biology 6093 Paper 3	https://eclatinstitute.sg/blog/o-level-biology-experiments
Combined Science 5086, 5087, or 5088 Paper 5	https://eclatinstitute.sg/blog/o-level-combined-science-practicals

O-Level and N-Level to SEC: What Changes in 2027?

Before 2027 and from 2027

Sources

2027 SEC dates: what is published so far

O-Level to SEC

N-Level to SEC

Science Practical Transition

FAQ

Official sources

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