GST Calculator Australia

The Australian GST rate is 10%. This rate has remained unchanged since the GST was introduced on 1 July 2000 under the Howard government. The 10% rate applies uniformly to all taxable goods and services, with no reduced rates for different product categories as seen in some other countries' value-added tax systems.

To add GST to a GST-exclusive price, simply multiply the amount by 1.10. For example, if an item costs $100 before GST, the GST-inclusive price is $100 × 1.10 = $110. The GST component is $10. This is the standard method used by Australian businesses when quoting prices to customers.

To find the GST-exclusive amount from a GST-inclusive price, divide by 1.10. For example, if a product costs $110 including GST, the GST-exclusive amount is $110 ÷ 1.10 = $100, and the GST component is $10. Alternatively, you can find just the GST amount by dividing the inclusive price by 11.

Several categories are GST-free under Australian law, including most basic food items (fresh fruit, vegetables, meat, bread, milk), certain medical services, some educational courses, childcare, exports, and some charitable activities. Water and sewerage services provided by government are also GST-free. The ATO maintains a detailed list of GST-free items on their website.

You must register for GST if your business has an annual GST turnover of $75,000 or more (or $150,000 for non-profit organisations). Taxi drivers and ride-sharing drivers must register regardless of turnover. You can choose to register voluntarily if your turnover is below the threshold, which allows you to claim GST credits on business purchases.

A Business Activity Statement (BAS) is a form submitted to the Australian Taxation Office (ATO) by registered businesses to report and pay their GST obligations, along with other tax obligations such as PAYG withholding and PAYG instalments. Most businesses lodge BAS quarterly, though some with higher turnover lodge monthly. BAS must be lodged even if there is nothing to report for that period.

GST is a value-added tax collected at every stage of the supply chain, with businesses claiming credits for GST paid on their inputs. This differs from the previous Wholesale Sales Tax (WST) that Australia used before 2000, which was only applied once at the wholesale level. The multi-stage collection of GST makes it harder to evade and creates a self-policing mechanism where businesses have an incentive to ensure their suppliers are correctly charging GST.

Yes, GST-registered businesses can claim input tax credits for GST included in the price of goods and services purchased for business purposes. To claim a credit, you must hold a valid tax invoice, the purchase must be for a creditable purpose, and you must be registered for GST. Credits are claimed through your BAS. You cannot claim credits for purchases used for making input-taxed supplies like financial services or residential rent.

Since 1 July 2017, GST applies to imported services and digital products (such as streaming services, apps, and e-books) when purchased by Australian consumers. From 1 July 2018, GST also applies to imported physical goods valued at or below $1,000. Overseas sellers with Australian sales exceeding $75,000 annually must register for and collect Australian GST.

This calculator uses the exact formulas specified by the Australian Taxation Office for GST calculations. The 10% GST rate is applied precisely using standard mathematical operations. Results are rounded to two decimal places following standard Australian currency conventions. While this tool is accurate for standard GST calculations, complex scenarios involving mixed supplies or special rules should be discussed with a registered tax agent.