Australian GST Calculator

Goods and Services Tax is a broad-based tax of 10% on most goods, services and other items consumed in Australia. To work out the cost of an item including GST, simply multiply the amount by 0.1 (or 10%), and if you want the total price simply multiply the price by 1.1 (110%).

When do I need to Pay GST?

The Australian Taxation Office’s dues dates for GST BAS lodgments is based on your annual turnover.

  • Quarterly if <$20 million in turnover.
  • Monthly if >$20 million in turnover.
  • Annually if <$75,000 in turnover and willingly registered for GST (<$150,000 for not-for-profits)

For small and medium businesses your Quarterly BAS Lodgment Due dates:

QuarterDue Date
1. July, August & September28 Oct
2. October, November & December28 Feb
3. January, February & March28 April
4. April, May & June28 July
GST Turnover

By Lodging through a registered tax agent or bookkeeper, you can expand to one extra month to lodge your BAS statements with the Australian Taxation Office and evade any late penalties. Late penalties are applied by the Australian Taxation Office as 1 penalty unit per 28 day period past the due date.

For more click here: How to Register for GST?

How to Subtract GST?

In Australia, the GST rate is 10%.

  • Calculate the GST amount: Multiply the total amount by the GST rate. For example, if the total amount is $100 and the GST rate is 10%, the GST amount would be $100 x 0.1 = $10.
  • Subtract the GST amount: Deduct the calculated GST amount from the total amount. In the example above, subtract $10 from $100, resulting in $90.

The resulting amount, in this case, $90 would be the original total amount excluding the GST. This process allows you to isolate the base amount before the GST was added.

How to Calculate GST Turnover?

To calculate GST turnover, follow these instructions:

  • Determine your total sales: Add up all the income you’ve earned from selling goods or services during a specific period.
  • Exclude GST from your sales: If you have included GST in your sales, subtract the GST component from the total sales figure. This will give you the amount of sales without GST.
  • Include other types of income: Include any other income that is subject to GST, such as interest received or rental income.
  • Exclude certain items: Some items are not considered in the GST turnover calculation, such as sales of capital assets or sales that are GST-free or input-taxed.
  • Calculate the GST turnover: Once you have the total sales figure (excluding GST) and other GST-inclusive income, add them together. This will give you your GST turnover.

Remember, the GST turnover is important for determining whether you need to register for GST, as there is a turnover threshold set by the ATO. If your GST turnover exceeds the threshold, you are generally required to register for GST.

GST Formula

  • Multiply the amount by 1.1 to add 10% to the price, but reverse GST calculations are quite tricky:
  • Divide the price by 11 to figure out how much GST was included in the price($110/11=$10).
  • To work out the price without GST, you must divide the amount by 1.1 ($110/1.1=$100). There are no special GST rates in Australia.

Examples of calculating GST in Australia

For instance, many people subtract 10% from a GST inclusive sale price to find out the GST-exclusive price, but this is incorrect. Instead of this, we need to divide by 11 to find the GST then multiply by 10 to find the GST exclusive price.

If you find both (Add and Subtract) GST paid on a $50 product and the GST-exclusive price of a $50 product, simply follow the following steps

  • $50 divided by 11 = $4.54
  • $4.54 is the GST
  • To find GST-exclusive price, multiply $4.54 by 10 which gives us $45.4
  • The GST-exclusive price is therefore $45.4

The Federal Govt. sets a multi-stage sales tax of 10% on the supply of goods and services by the registered businesses for Goods and Services Tax (GST). This tax (GST) system was introduced in Australia on 1 July 2000 by Howard Liberal’s government.

Several supplies are Tax GST-free (e.g., many basic medical, foodstuffs, and educational services, exports), input-taxed (residential accommodation, financial services, etc.), exempt (Government charges), or outside the scope of GST. The revenue from this Tax (GST) is disseminated to the States. State governments do not demand any sales though they impose stamp duties on various transactions.

In summary, the government will charge a GST rate of 10% on most goods and services provided in Australia. If You’re a registered business for GST, you need to add Tax (GST) to the price you charge your customers for goods and services they purchase.

Also, You can claim a credit for the GST you’ve paid on your business expenses and other inputs (called a GST credit). You must pay the difference between GST charged on your sales and GST credits to the Tax Office periodically.

There are two types of sales that GST will treat differently:

  1. Suppliers of Tax (GST) free goods and services will not have to pay Tax (GST) when they make a sale but will be entitled to GST credits.
  2. Suppliers of input-taxed goods and services do not have to charge Tax (GST) on sales, but they will not be entitled to claim GST credits from their purchases of inputs.

More About GST

What is GST in Australia?

The full form of GST is Goods and Services Tax. GST is a broad-based tax of 10% that is applied on goods, services and other items consumed in Australia. Registered shops collect GST from customers on the behalf of ATO (Australian Taxation Office).

How do I add GST to an invoice?

Include the total price of the goods, with a statement that indicates ‘all prices include GST’, or. Include the GST as a line item for each individual good.

Are all goods and services subject to GST in Australia?

No, not all goods and services are subject to the GST in Australia. The GST is a broad-based tax, but some specific rules for certain goods and services. For example, some goods and services that are exempt from GST include basic food items, medical, education, and some exports.

How does the GST work in Australia?

In Australia, the Goods and Services Tax is a broad-based tax applied on goods and services. Registered businesses collect the GST on behalf of the Australian government. They must regularly report their GST obligations and remit the collected GST to the Australian Taxation Office.

How does the GST apply to imports and exports in Australia?

Imports into Australia are subject to the Goods and Services Tax, you’ll have to pay GST on imported goods. Exports from Australia are generally GST-free, you won’t charge GST on sales to customers outside of Australia. Specific rules apply, so it’s best to consult the Australian Taxation Office (ATO) or seek professional advice.

What items have GST in Australia?

1. Biscuits, cones and wafers.
2. Savoury snacks such as potato chips.
3. Ice cream.
4. Soft drinks and flavored milk such as chocolate milk.
5. Bakery products such as cakes, pastries and pies.
6. Food marketed as prepared meals such as sushi, curry and rice dishes.
7. Food platters.
8. Chocolates and lollies.
There are some items that are taxable as they are not yet considered food.
1. Live animals.
2. Plants and seeds that grow into fruit or vegetables.


GST (Goods and Services Tax) is a broad based tax 10% on Goods and services in Australia, with some exemptions and concessions. But some business do not need to pay GST like basic medical, foodstuffs, and educational services, exports.