What is the GST rate in Australia?

GST is generally 10% on taxable sales in Australia.

How do you remove GST from a GST-inclusive price?

Divide the GST-inclusive price by 1.10 to find the GST-exclusive price. The GST amount is the difference, or one-eleventh of the GST-inclusive price.

GST Calculator

Work out GST-exclusive, GST amount, and GST-inclusive totals for Australian prices.

Price excluding GST

Calculate

GST amount

$88.00

GST exclusive

$880.00

GST inclusive

$968.00

BREAKDOWN

GST is 1/11 of a GST-inclusive taxable sale, or 10% of the GST-exclusive price.

Base price: 90.9%

GST: 9.1%

Australian GST rate

Australian GST is generally 10% on taxable sales. Some sales are GST-free or input-taxed, so this calculator is for standard taxable prices.

It is an estimate tool only. Check the ATO rules or an adviser for edge cases, mixed supplies, and BAS reporting.

Formula

Add GST: ex GST x 1.10
Remove GST: inc GST / 1.10
GST in total: inc GST / 11

Sources

ATO: How GST works
ATO: Taxable sales

How to use the GST calculator

Choose whether your starting amount is GST-inclusive or GST-exclusive.
Enter the amount and review GST amount, ex-GST and inc-GST totals.
Use the result to cross-check quotes, invoices, and cashflow estimates.

Assumptions and checks

This tool uses the standard 10% GST rate for taxable sales in Australia. It does not determine whether a transaction is actually taxable or GST-free — that depends on transaction type and ATO rules.

Methodology Disclaimer