Australia GST Calculator
Add Australian GST at the flat 10% rate to any net price — or remove GST from a GST-inclusive amount. Australia uses one flat rate with no reduced tiers. Instant net, GST, and gross breakdown.
Add or remove Australian GST at flat 10% — instantly shows net, GST amount, and gross total for BAS and invoicing.
Formula
Add GST: Gross = Net × 1.10 | Remove GST: Net = Gross ÷ 1.10
Australia's GST at 10% is a flat rate with no reduced tiers. Multiply the net price by 1.10 to get the GST-inclusive price. To extract the net from a gross price, divide by 1.10. The GST is always one-eleventh (1/11) of the GST-inclusive price — a useful quick check.
Worked Example
Scenario: An Australian freelancer invoices a client AUD 2,000 for design services. GST at 10% applies (assuming the freelancer is GST-registered).
GST = AUD 2,000 × 10% = AUD 200.00
Gross = AUD 2,000 + AUD 200 = AUD 2,200.00
Quick check: GST component should equal 1/11 of the gross. AUD 2,200 ÷ 11 = AUD 200. Confirmed.
Common Mistakes
- Charging GST before reaching the registration threshold. Only businesses with a GST turnover of AUD 75,000 or more (or AUD 150,000 for non-profits) are required to register. Charging GST without being registered is not permitted.
- Applying GST to GST-free supplies. Fresh food, most medical services, and some educational courses are GST-free (zero-rated), not just exempt. This distinction matters for claiming input tax credits. Always verify whether a supply is GST-free, input-taxed, or standard-rated.
- Forgetting the 1/11 rule when checking. Because 10% GST is always exactly 1/11 of the gross price, you can always verify your GST extraction: gross ÷ 11 should equal the GST amount.
Guide
How to Use
- 1
Choose Add or Remove
Select Add GST to calculate the GST-inclusive price from a net amount, or Remove GST to extract the net from a gross price.
- 2
Enter the amount
Type the price in Australian dollars (AUD). The calculation works for any value.
- 3
Click Calculate
The result shows the net amount, GST at 10%, and the GST-inclusive total.
- 4
Copy the result
Use the copy button to paste the breakdown into an invoice, tax return, or expense record.
FAQ
Frequently Asked Questions
Next Steps