Underneath the prescribed uniform, bras bearing only the colours of white, light-grey, or beige may be worn.

[11] During official engagements, students representing the school (councillors on most occasions) wear the formal uniform consisting of a long-sleeved white blouse, a white pencil skirt, a navy blue blazer with the school crest on the left chest, along with a navy blue tie and a pair of black court shoes.

CHIJ Secondary (Toa Payoh) is considered unofficially to be the 'sister' school of Saint Joseph's Institution (SJI).

The Express Course is a nationwide four-year programme that leads up to the Singapore-Cambridge GCE Ordinary Level examination.

Students can move from one course to another based on their performance and the assessment of the school principal and teachers.

[16] Students take English Language, Mathematics, Basic Mother Tongue and Computer Applications as compulsory subjects.

[16] CHIJ Secondary was awarded the South Zone Centre of Excellence ( CoE) for Language and the Arts in Aug 2007.