Australia GST Business Calculator
Add 10% Australian GST to a net price — or remove it from a GST-inclusive amount. Get the ex-GST price, GST amount, and GST-inclusive total for tax invoices, quotes, and BAS reporting.
10% GST quick reference
Add GST
Net × 1.10
Remove GST
Gross ÷ 1.10
GST component
Gross ÷ 11
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
What to do next
Related by Workflow
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When to use each mode
Add GST (quoting / invoicing)
Use when you have a net price and need to add GST before issuing a tax invoice or quote to a customer.
Remove GST (BAS / expense claims)
Use when you have a GST-inclusive receipt or invoice and need to separate the ex-GST amount and GST credit for your BAS lodgement.
Save this in your team workflow
Bookmark this page for your accounts and bookkeeping team so you do not need to search again. Use the Copy result button to paste the GST breakdown into your invoice template, Xero, MYOB, or BAS spreadsheet.