GST Calculator Australia

Add or remove Australia’s 10% goods and services tax from an amount.

The amount you entered

GST breakdown

GST amount
$0.00
Price before GST
$0.00
Price with GST
$0.00

What is GST in Australia?

Goods and services tax is a broad-based tax of 10% on most goods, services and other items sold or consumed in Australia. A GST-registered business generally includes GST in taxable sales and may claim credits for GST paid on eligible business purchases.

How to use the GST Calculator Australia

  1. Enter the amount.
  2. Choose GST included to remove GST from a total, or Before GST to add it.
  3. Review the GST component and both price views.

How the GST calculation works

To add GST, multiply the exclusive price by 10%, then add it. To remove GST from an inclusive amount, divide by 11 to find the GST component. Dividing by 10 would be wrong because the inclusive total already contains the tax.

Worked example: removing GST from $110

$110 ÷ 11 gives $10 GST. The price excluding GST is $100, while the GST included price remains $110.

When GST does and does not apply

Most Australian sales are taxable, but some supplies are GST-free or input taxed. Common GST-free areas can include certain basic foods, health and education supplies, while examples of input-taxed supplies can include residential rent and some financial services. The exact treatment depends on the transaction.

Benefits of a GST breakdown

  • Prepare or check invoices.
  • Compare supplier prices consistently.
  • Separate the tax component for bookkeeping.
  • Avoid using the wrong divisor when removing GST.

Disclaimer: this tool performs the standard 10% arithmetic only. It does not decide whether a sale is taxable, GST-free or input taxed.

Frequently asked questions

What is the GST rate in Australia?

The standard GST rate is 10%.

How do I remove GST from a total?

For a standard taxable sale, divide the GST included total by 11 to find the GST component.

Is every product subject to GST?

No. Some supplies are GST-free or input taxed, so check the correct treatment before invoicing.

Does the result include business tax advice?

No. It is a mathematical breakdown only.

Use the right GST view

Choose inclusive when checking a retail total and exclusive when building a price before tax. For broader personal tax planning, use the PAYG Tax Calculator or HECS-HELP Repayment Calculator Australia.