Knox Grammar School vs St Andrew's Cathedral School
🇦🇺 Sydney · Side-by-side comparison on verifiable public data.
Reviewed by Priscilla Han
Which should you choose?
Both run National, so the difference is inspection rating, boarding, and fees rather than the curriculum itself; Knox Grammar School offers boarding while the other is day-only. The choice comes down to target curriculum, whether you need boarding, and budget — verify fees against each school's own figures.
Neither Knox Grammar School nor St Andrew's Cathedral School sits in a market with a public inspectorate, so both are assessed on verifiable accreditation, curriculum authorisation, and published data rather than an official quality rating. One practical difference: Knox Grammar School offers boarding while the other is day-only — decisive for families who need a residential option. Verify current fees against each school's own figures (see the table below).
Key Facts
| Knox Grammar School | St Andrew's Cathedral School | |
|---|---|---|
| Curriculum | National | IB / National |
| Ages | 4–18 | 5–18 |
| Languages of instruction | English | English |
| Annual fees | AUD 42,640–45,120 (day, 2026) | AUD 26,699–48,137/year (2026, domestic); overseas higher |
| Enrollment | 2,900 | — |
| Boarding | Yes | Day only |
| Accreditations | NESA, AHISA, HMC, CAS | NESA, CRICOS, IB World School |
Strengths
- ✓Strong, publicly reported HSC academic record (2025 median ATAR 89.95)
- ✓Exceptionally broad co-curricular offering — 30+ sports, 70+ activities, 90+ music programmes
- ✓Full boarding provision for boys from Year 7 across three boarding houses (200+ places)
- ✓Large, well-resourced school across three campuses
- ✓Long-established (1924) with strong CAS/AHISA standing
- ✓Genuine dual senior pathway — students pick the IB Diploma or HSC, rare and valuable for mobile families
- ✓IB MYP framework across Years 7–10, giving an internationally-coherent middle-school spine
- ✓Strong school-reported 2025 outcomes (IBDP median 37.5; 42% of cohort ATAR >90)
- ✓Exceptional languages and music depth (16 HSC subjects at 100% top-two-band in 2025)
- ✓Distinctive Gawura First Nations school and a stated K–12 First Nations strategy
Trade-offs
- !Boys-only at primary and secondary — no co-education above early years
- !Uniting Church / Presbyterian faith heritage may not suit secular or other-faith families (a fit consideration, not a judgement)
- !High fees (≈AUD 42,640–45,120/yr day in 2026, boarding extra)
- !No IB Diploma pathway verifiable — HSC only, less internationally portable for mobile expat families
- !Day fees are aggregator-sourced (official schedule is PDF-only); boarding fee not public in plain text
- !No boarding — non-Sydney or overseas families must arrange their own accommodation
- !Total enrolment and class-size data are not publicly published, reducing independent transparency
- !Vertical CBD campus means limited on-site green/playing-field space versus suburban peers
- !IB Diploma carries an extra fee surcharge on top of already-high city tuition; overseas fees plus a AUD 10,000 bond are steep
- !No early-years/preschool and no PYP — entry starts at Kindergarten, so no IB continuum for younger children
Best Fit For
- • Families wanting a single-sex boys' education on Sydney's Upper North Shore
- • Boarding families (domestic regional or expat) needing Year 7+ boarding for boys
- • Students seeking a very broad sport/music/co-curricular programme
- • Families comfortable with a Uniting Church-affiliated school
- • Expat / internationally-mobile families wanting an IB Diploma option inside a top Australian school
- • Families living or working in central Sydney who value a CBD campus
- • Musically or linguistically gifted students
- • Families seeking an Anglican, values-based co-educational environment
University Placement
School-reported · not independently verified
School-reported, unverified: 2025 median ATAR 89.95 (UAC-based). A third-party directory cited a 2024 median ATAR of 92.3. University-destination data is not public. No IB results exist to cite.
School-reported, unverified: Class of 2025 — 42% of the combined HSC/IBDP cohort achieved an ATAR over 90; IBDP median score 37.5 (top-10% average ATAR 99.17); HSC median ATAR 84 (top-10% average 97.8). Figures are school-published, not independently verified.
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Frequently Asked Questions
Should I choose Knox Grammar School or St Andrew's Cathedral School?
Knox Grammar School is best for: Families wanting a single-sex boys' education on Sydney's Upper North Shore. St Andrew's Cathedral School is best for: Expat / internationally-mobile families wanting an IB Diploma option inside a top Australian school. The right choice depends on target curriculum, budget, and family priorities — the two are not linearly comparable.
How do fees compare between Knox Grammar School and St Andrew's Cathedral School?
Knox Grammar School: AUD 42,640–45,120 (day, 2026). St Andrew's Cathedral School: AUD 26,699–48,137/year (2026, domestic); overseas higher. Verify against each school's own published fees; some figures are sourced from third-party aggregators.
What curricula do Knox Grammar School and St Andrew's Cathedral School offer?
Knox Grammar School: National. St Andrew's Cathedral School: IB, National.
Do Knox Grammar School or St Andrew's Cathedral School offer boarding?
Knox Grammar School: offers boarding. St Andrew's Cathedral School: day school only.
Questions parents ask
This comparison is BrightKey's independent assessment using verifiable public data only. University-placement figures are school-reported and not independently verified. BrightKey takes no payments from schools. Our method →