Public vs Catholic vs Independent Schools in Australia: What the Data Says

About two in three Australian students attend a government school, roughly one in five a Catholic school, and about one in seven an independent school. The sectors overlap far more than the public debate suggests, but there are real differences worth understanding.

The three sectors at a glance

Government (public) schools are run by each state or territory education department, are free to attend (apart from voluntary contributions, uniforms and excursions) and must enrol any student living in their designated catchment or zone. Selective and specialist public schools are the exception: entry is by test or audition.

Catholic schools are mostly run by diocesan Catholic education offices ("systemic" schools) with moderate fees, plus a smaller number of independent Catholic schools run by religious orders, which charge more. Enrolment usually prioritises Catholic families but most schools welcome others.

Independent schools are self-governing non-government schools: Anglican, Uniting, Islamic, Jewish, Lutheran, Steiner, Montessori, grammar schools and many non-denominational schools. Fees range from a few thousand dollars a year to well above $40,000 at the most expensive senior years.

What the ACARA data shows

Across the schools in our database, non-government schools have a higher average ICSEA than government schools. This is partly selection (families who can pay fees tend to be more advantaged) and partly geography. Within each sector there is enormous variation: many government schools in affluent suburbs have higher ICSEA values than most Catholic and independent schools.

On students per teacher, independent schools tend to have the lowest ratios, government schools the highest, with Catholic schools in between, though the gap is smaller than many parents assume. Note that this ratio is not class size: it counts specialist teachers, learning-support staff and executives.

Results: what we can and cannot say

Raw NAPLAN and ATAR averages are higher in the non-government sectors, but when researchers control for ICSEA the difference shrinks dramatically and in some studies disappears. In other words, the sector matters less than the community and the individual school. A good government school will serve your child better than a mediocre private one.

Cost over thirteen years

A rough rule of thumb for a child starting now:

• Government: tens of thousands of dollars over 13 years once uniforms, devices, excursions and contributions are counted.
• Catholic systemic: typically low to mid six figures.
• Independent: anywhere from similar to Catholic up to well over half a million dollars at high-fee schools.

Fees usually rise faster than inflation. Check the school's fee schedule, ask about sibling discounts and bursaries, and remember that tutoring, music and sport are often additional.

How to decide

1. Start with the rankings for your state filtered by sector to see which local schools in each sector are realistically available.
2. Compare the specific schools, not the sectors. Use the compare tool.
3. Visit at least one school in each sector you are considering. The differences in culture are often more visible than the differences in data.
4. Be realistic about fees. Financial stress at home affects children more than any difference between a good public school and a good private one.

Whatever sector you choose, your child's progress depends most on the fundamentals they bring. A free assessment before enrolment shows exactly where those fundamentals stand.