GST Calculator Australia — Free 2026
Instantly add or remove 10% Australian GST. Get a clear net, GST and gross breakdown — perfect for invoicing, quoting and BAS reporting.
How It Works
- Enter the amount
- Choose Add or Remove GST
- View the breakdown
Understanding Australian GST
The Goods and Services Tax (GST) is a broad-based 10% tax on most goods, services and other items sold or consumed in Australia. It was introduced on 1 July 2000, replacing the previous wholesale sales tax. The Australian Taxation Office (ATO) administers GST, and businesses collect it on behalf of the government through their Business Activity Statement (BAS).
Unlike the UK's VAT system — which has multiple rates (20%, 5%, 0%) — Australia uses a single flat rate of 10% for all taxable supplies. This simplicity makes GST straightforward to calculate, though understanding which goods and services are taxable versus GST-free still requires care.
GST-Free vs Taxable Items
A key distinction in Australian GST is between taxable supplies (10% GST applies) and GST-free supplies (0% — GST does not apply, but businesses can still claim input tax credits). Input-taxed supplies (like residential rent and financial services) also carry no GST, but businesses cannot claim credits on related purchases.
| Category | GST Status | Examples |
|---|---|---|
| Fresh food & basic groceries | GST-free | Bread, milk, fruit, vegetables, meat |
| Prepared & takeaway food | Taxable (10%) | Restaurant meals, hot chips, takeaway coffee |
| Health services | GST-free | GP visits, hospital treatment, medicines on PBS |
| Education | GST-free | School fees, TAFE, university courses |
| Exports | GST-free | Goods and services sold overseas |
| Alcohol, tobacco, fuel | Taxable (10%) | Wine, beer, cigarettes, petrol |
| Residential rent | Input-taxed | Long-term residential tenancy |
| Financial services | Input-taxed | Lending, life insurance premiums |
GST Registration Threshold
You must register for GST if your annual GST turnover is $75,000 or more ($150,000 for non-profit organisations). Taxi drivers and ride-share operators (Uber, DiDi, etc.) must register regardless of income. Voluntary registration below the threshold is allowed — and often beneficial — because it lets you claim GST credits on business expenses.
Quick GST Formulas
- Add GST: GST = Net × 0.10 | Gross = Net × 1.10
- Remove GST: GST = Gross ÷ 11 | Net = Gross × (10 ÷ 11)
The "divide by 11" rule is a handy mental shortcut Australians use constantly. A $220 invoice includes $20 GST (220 ÷ 11) and $200 net.
BAS Reporting and ABN Requirements
GST-registered businesses must lodge a Business Activity Statement (BAS) — typically quarterly — reporting GST collected on sales and GST credits claimed on purchases. The net amount is paid to (or refunded by) the ATO. You need an Australian Business Number (ABN) before you can register for GST. If you supply taxable goods or services without quoting your ABN, the payer may be required to withhold 47% of the payment under the no-ABN withholding rules.
For a full picture of your Australian income tax obligations, see our Australian Salary Calculator, which covers income tax, Medicare levy and superannuation for the 2025–26 financial year.
Frequently Asked Questions
Australia has a single GST rate of 10%. It has been 10% since GST was introduced on 1 July 2000. Unlike the UK and EU, Australia does not have multiple tax rates — it is always 10% for taxable supplies.
Many essential goods and services are GST-free in Australia. These include most fresh food and basic groceries, health services and PBS medicines, education courses and childcare, exports, and certain financial services. Prepared meals, alcohol, tobacco, and petrol are taxable at 10%.
You must register for GST if your business has a GST turnover of $75,000 or more per year ($150,000 for non-profit organisations). Ride-share and taxi drivers must register regardless of turnover. Once registered, you charge GST on taxable sales and claim GST credits on business purchases via your BAS.
To add GST to a net amount: multiply by 0.10 to get the GST, then add it to the net to get the gross. For example, $100 net + $10 GST = $110 gross. To remove GST from a gross amount: divide the gross by 11. For example, $110 ÷ 11 = $10 GST, leaving $100 net.
Comments