GST Calculator Australia

Free GST calculator for Australian businesses. Calculate GST inclusive and exclusive prices instantly.

Calculate GST (10%)

Australian Goods and Services Tax calculator - Add or remove GST from any amount

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About GST in Australia

What is GST?

The Goods and Services Tax (GST) is a broad-based tax of 10% on most goods, services, and other items sold or consumed in Australia.

Who needs to charge GST?

  • Businesses with a turnover of $75,000 or more
  • Non-profit organizations with a turnover of $150,000 or more
  • Taxi and ride-sharing drivers (regardless of turnover)

GST Registration

If your business turnover exceeds the threshold, you must register for GST with the Australian Taxation Office (ATO) and obtain an Australian Business Number (ABN).

Common GST Calculations

  • Adding GST: Multiply the amount by 1.1 (or add 10%)
  • Removing GST: Divide the amount by 11 to get the GST portion
  • GST-Free items: Basic food, some medical and health services, education, exports

Related Australian business tools

Use these next when checking prices, business details, or invoices.

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ABN Lookup

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Invoice Generator

Create Australian tax invoices with GST.

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    GST Calculator Australia 2025 | Add or Remove GST | OzSparkHub