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September 10, 2026
Last updated: July 2026
Most children in Australia start preschool the year they turn four, but that's a convention, not a rule. In NSW, long day care services like Kings Road Long Day Preschool also take children from three, and there's genuine research behind starting earlier: children who begin preschool at three tend to be less developmentally vulnerable in language and thinking skills by school age than children who wait until four. Starting at four works well too, and it isn't a lesser choice. What matters more than the exact birthday is whether your child is ready to spend real time away from you, whether a place is actually available, and what suits your household. Our three-year-olds join Wallaby Class, then move into Kangaroo Class the year they turn four and stay there until they start Kindergarten. Here's what the research actually shows, how NSW's fee relief treats each age, and the practical things worth thinking through first.
There's no legal starting age for preschool itself, only for compulsory schooling. Most preschool programmes in NSW, including the community preschools funded for the year before school, are built around four-year-olds. Long day care services can and do enrol younger children though, and NSW's own Start Strong fee relief scheme now recognises three-year-olds as well as four-year-olds, which says something about where policy has moved. Here, children can start in Wallaby Class from three, well ahead of the more typical four-year-old preschool year. If you're still working out the right preschool for your child more broadly, our full guide to choosing a preschool in Castle Hill covers what to look for beyond just timing.
Neither age is objectively better, but the research leans toward earlier being at least as good, and often more helpful. Evidence for Learning's early childhood education toolkit, drawing on 41 studies, found that starting a year earlier produces a moderate positive impact on learning outcomes, on average about three months' extra progress. Australian data from the Longitudinal Study of Australian Children found something more specific: children who hadn't attended any early childhood education by three or four were 3.3 times more likely to be developmentally vulnerable in language and cognitive skills at school entry, compared with children who started at three. Children who started at four only, missing that extra year, still sat at 1.5 times the odds. An extra year genuinely seems to matter, particularly for language and thinking skills.
Worth being honest about the limits too. E4L rates the evidence as low security, partly because most studies compare four versus five, not three versus four, so the three-year-old numbers are thinner than the headline stats suggest. Quality matters as much as timing: a mediocre extra year won't do what a well-run one will.
There are good reasons some families still choose four. A child who's clingier, not toilet-independent yet, or simply not ready for a full day away from a parent might do better with another year at home first. Four-year-olds also tend to arrive with more language, coordination and patience for group activities, which eases the transition.
Wallaby Class takes children from three to four, with a focus on music, movement and the early building blocks of literacy. Kangaroo Class takes children from four to five and steps up the school-readiness work, including the Carnine phonics method. Class placement is generally decided at the start of each year, based on a child's age and whether they're due to start Kindergarten the following year. It isn't a rolling, individual "are they ready yet" call made at any point in the year. Both classes share one indoor and outdoor learning environment instead of working from separate rooms, though each still runs its own programme.
No, the two are separate decisions. Under NSW Department of Education policy, a child can start Kindergarten at the beginning of the school year if they turn five on or before 31 July that year, and by law every child must be in compulsory schooling by their sixth birthday. Kindergarten enrolment itself isn't compulsory before that point. Starting preschool at three just means two years of preschool before school instead of one. It doesn't shift the Kindergarten cut-off date at all.
It does change what NSW puts toward your fees. The Start Strong fee relief programme now provides relief for children in long day care from age three, not just four, though the three-year-old rate is lower than the four-year-old one. It's paid on top of the Child Care Subsidy. Ask your chosen service for the current combined figures.
A handful of practical questions matter more than the calendar:
There's no checklist answer here. Talking it through with your child's current carer, your GP, or the preschool itself usually helps more than any general guide can.
Most long day care and preschool programmes, including our Wallaby Class, start from age three. Younger children are generally better suited to a toddler or long day care programme built for their age group, not a preschool-style curriculum.
Not really. The research favours an earlier start on average, but your child's own readiness, your family's circumstances and the quality of the centre all matter more than hitting a specific age.
A child can start Kindergarten at the beginning of the school year if they turn five on or before 31 July of that year. School only becomes compulsory at your child's sixth birthday.
Class placement is generally set at the start of each year based on age and whether a child is due to start Kindergarten the following year, and not usually changed mid-year.
Yes. Start Strong now provides fee relief for children in long day care from age three as well as four, though the four-year-old rate is higher, and it applies on top of the Child Care Subsidy.
No single factor guarantees anything. An earlier, high-quality start is linked to stronger language and thinking-skill outcomes on average, but programme quality matters as much as age.
We've been running Wallaby and Kangaroo classes in Castle Hill since 1989, which means we've watched plenty of three-year-olds settle in beautifully, and just as many four-year-olds do exactly the same. Our Learning for Life approach and the Three Rs, Respect, Responsibility and Resilience, shape both classes, so the step from Wallaby to Kangaroo feels like a continuation rather than a fresh start. We're a small, close-knit centre by design, Meeting NQS, and part of an inclusive, multicultural community that welcomes families across Castle Hill and the Hills District, including Baulkham Hills, Kellyville, Cherrybrook and West Pennant Hills. If you're weighing up when to start, we're always happy to talk it through.
Book a tour of Kings Road Long Day Preschool to see Wallaby and Kangaroo classes in action, or get in touch with any questions about timing your child's start. Already know you're ready? You can enrol for 2027 today.
