The report, commissioned by BIG W, gathered data through surveying more than 1,050 adults with children aged between five and 17-years-old and estimates the average, per child, spend on school supplies and uniforms in 2020 at $538, 13 per cent more than last year.

It also estimates an average of $3.8 billion to be spent by Australian parents in 2020 on back-to-school supplies alone.

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Officeworks Business Manager Jim Berndelis said his number one money-saving tip when buying back to school supplies is "outsourcing your child's school list."

Students are provided with a list of things they will require for the year at the start of each year, and according to Mr Berndelis, it's easy to overshop without the help of a list to keep you on track.

Mr Berndelis said each Officeworks store offers a free school list service, where parents can drop off or upload their child's school list online or instore and the team at that location will then select and pack the items for them.

"By using the Officeworks school list service you can save on average more than 30 per cent on 2020 school list prices," Mr Berndelis said.

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"Being prepared and doing your research on back to school deals is another easy way to save money."

According to the Back to School report, many Australian parents will be "hit" with extra costs of around $240 for technology purchases due to the implementation of 'Bring Your Own Device' (BYOD) programs being introduced into several schools across the country in recent years.

These programs require students to bring things like they're own ipads and headphones.

On average, uniforms are expected to cost $156 per child, a rise of $24.

The items said to have the highest price tags were shoes and uniforms, averaging at $220 per child, per set.

Money-saving expert and author of Kill Bills!, Joel Gibson said planning would save parents dollars and stress.

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"The research shows that early shoppers spend less. Do research, and compare brands and prices. You'll be surprised at the savings made by shopping early," he said.

"Fly solo at the shops. Pester power is real. Two-thirds of Aussie parents say they overspend on back to school supplies by buying non-essential items. So to save that extra cash, play it safe and leave the kids at home."