GST calculator

Goods & Services Tax for Australia

Use this free GST calculator to help with all your GST calculations.

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Calculate the GST

Enter the starting amount, then select whether you want to add GST to it or remove the GST portion.
The calculator will do the rest:
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How can a GST calculator assist you?

A GST calculator is a handy tool designed to help users determine the Goods and Services Tax (GST) applied to different products and services. GST is a value-added tax imposed at each stage of the supply chain on the value added to goods and services. By using a GST calculator, both businesses and individuals can quickly identify the GST portion of a total transaction amount, factoring in the base price along with any applicable taxes. This supports accurate billing and helps ensure compliance with GST requirements.

If you’re a small business owner or sole trader in Australia, it’s important to understand how to calculate GST correctly. Keeping track of your GST obligations is essential, as this information feeds into your Business Activity Statement (BAS). At Accountants Direct, we offer services to lodge your BAS on your behalf, making the process even easier.

What is GST and how do you calculate it?

With the right team in your corner, you can be 100% confident that our bookkeeping services for small businesses will ensure everything is done right.

  1. What is GST?

    The GST is a 10% flat tax that is applied to the majority of goods, services, and other items that are consumed in Australia.

    If you own a business that sells products or services in Australia, you need to calculate how much GST to add to their base price.

    GST is the portion of the product price you pay to the Australian Tax Office (ATO).

  2. Find the GST-inclusive price

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    Your base price x 1.1 equals the GST-inclusive price.

    So, for example, let’s work out the GST-inclusive price if your base price is $200.

    $200 x 1.1 = $220

    The GST-inclusive price for this product is $220.

    And the GST portion of that is $220-$200= 20

  3. Find the GST-exclusive price

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    To find the GST-exclusive price, you have to divide the GST-inclusive price by 1.1.

    So, let’s take the same product that cost $110.

    $110/1.1 = $100. The GST-exclusive price was $100.

    And the GST portion of that is $110-$100=$10

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