2 years of kinder: the evidence parents need to see

If you're sitting at the kitchen table with a half-cold coffee, weighing up whether to send your three-year-old to kinder this year or wait until they're four, the short version is this: the research is firmly on the side of two years. Not because it's trendy, and not because the government is subsidising it (although it is) but because of what the early years are doing inside your child's brain while they're busy building train tracks and arguing about whose turn it is on the swing.

So, what's happening in a child's brain before age 5?

According to the Victorian Government, around 90 percent of a child's brain development is complete by age five. The first five years are when the architecture of language, attention, emotional regulation, and early literacy is laid down, and what happens during this period has lasting effects on how a child manages frustration, makes friends, and engages with learning later on.

This isn't to make any parent feel guilty about screen time on a Tuesday afternoon when you needed twenty minutes to make dinner. It's the reason early childhood educators, researchers, and policymakers across the OECD have spent the last decade pushing for two years of structured early learning before school, rather than one.

What does 2 years of kinder do for a child?

The Victorian Government identifies six specific gains for children who attend two years of kinder: 

• Stronger language
• Pre-reading skills
• Early number concepts
• Independence
• Concentration, and
• Social skills. 

As the Victorian Government puts it, “Quality play-based learning is a powerful way to support learning and development.” They're the building blocks teachers rely on when a child walks into Prep on day one and is expected to sit on the mat, listen to a story, recognise their name in print, and share crayons with someone they've just met.

A landmark UK study cited by the Mitchell Institute at Victoria University found that students who attended two to three years of preschool went on to achieve higher overall scores in their end-of-school exams, better grades in English and maths, and sat final-year exams in more subjects. The effect carried right through to the end of secondary education.

What does the Australian data show?

The Australian Early Development Census (AEDC) is conducted every three years and measures children's development across five domains in their first year of school. The 2024 results, released by the Department of Education, found that 12.5 percent of children were developmentally vulnerable on two or more domains, up from 11.4 percent in 2021. The numbers are higher again in lower socio-economic areas, in regional and remote communities, and for Aboriginal and Torres Strait Islander children.

According to the Front Project, children identified as developmentally vulnerable in their first year of school are, on average, a year behind their peers in NAPLAN by Grade 3 and two years behind by Grade 5. Catching up is possible. Starting on track is easier.

What does international research say?

The shift to two years isn't an Australian invention. Estonia provides low-cost or free preschool from age three, with the average three-to-six-year-old attending 30 hours or more a week, and outcomes include stronger self-regulation and smaller gaps in development based on socio-economic background. Finland offers free or low-cost early childhood education with a play-based curriculum, and the benefits track through to age 15 and beyond. In 2010, Ontario in Canada increased its preschool program from 15 to 30 hours a week, with measurable gains in early literacy, numeracy, and self-regulation. The OECD's Starting Strong 2017 report concluded that two years of kindergarten produces better outcomes than one, full stop.

What does this all cost in 2026?

This is where the conversation usually stalls. Two years of kinder sounds expensive, and historically it has been. The cost picture in 2026 is different.

In Victoria, Free Kinder covers three and four-year-old programs at participating services, with a fee offset of $2,101 a year in long day care for the standard 15 hours, rising to $4,202 in priority Pre-Prep areas. Queensland's Free Kindy gives all four-year-olds 15 hours a week for 40 weeks. NSW Start Strong fee relief offers up to $2,563 for four-year-olds and $769 for three-year-olds in long day care, with higher rates in community preschools. South Australia's Flying Start reform is rolling out three-year-old preschool from 2026, beginning in regional and remote areas, and the ACT funds 300 hours a year of three-year-old preschool at partner providers across Canberra. Federal Child Care Subsidy applies on top of all of these in long day care settings.

What that means in practice: for most families, the cost of adding a second year is no longer a financial decision so much as a logistical one. The question moves from “can we afford it” to “is this the right service and the right schedule for our child.”

How do I know if my child is ready?

Three-year-old kinder is play-based, not academic. Children aren't expected to sit at desks, write their name, or do flashcards. They're expected to play, follow simple routines, separate from a caregiver for a few hours, and be guided by qualified educators. Most three-year-olds are ready for that. If yours has separation anxiety, a recent illness, or a personality that needs more time, talk to the service about staggered starts, shorter sessions, or commencing in term two.

The point isn't to push every three-year-old through a starting gate. It's to make sure the families who want a second year, or whose children would benefit from one, can access it without cost being the deciding factor. In 2026, that's largely the case.

Care for Kids lists kindergarten and preschool services across Australia, alongside a Cost of Care Calculator. From there you can search for participating services in your area and contact them directly about enrolment.