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.

Why not create separate SEC Biology, SEC Chemistry, and SEC Physics tuition pages now?

Eclat is not doing that yet because current search behavior still uses O-Level, Sec 3, Sec 4, subject-code, and practical wording. The existing O-Level science pages are the clearer bridge owners for now.

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

Study guide30 May 2026, 00:00 ZUpdated 17 Jul 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.

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 Vs From 2027

Question	2026 and before	From 2027
What do families call the exams?	GCE N(T)-Level, GCE N(A)-Level, and GCE O-Level.	Singapore-Cambridge Secondary Education Certificate (SEC).
What subject levels appear?	Families usually think in N(T), N(A), and O-Level route labels.

Sources

Add Eclat Institute as a Preferred Source on Google.

Page type	What it should do
SEC explainer	Explain the new certificate and G1/G2/G3 terms.
O-Level/N-Level transition comparison	Help legacy searchers understand the 2027 change.
Existing O-Level pages	Keep serving 2026 subject, practical, tuition, and date intent.
Existing N-Level pages	Keep serving final N-Level date and results intent.
Existing science practical hubs	Keep practical preparation concrete while adding SEC wording.

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 Vs From 2027

Sources

O-Level To SEC

N-Level To SEC

Why Eclat Is Keeping O-Level And N-Level Pages

Science Practical Transition

FAQ

Official Sources

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