Australia GST Calculator
Calculate Australian Good & Service Tax (10%) instantly. Easily add or remove GST from any AUD amount with our high-precision tool.
Select Your Mode
Choose between "Add GST to Net" for creating quotes or "Extract GST from Total" to help reconcile receipts and expenses.
Enter Your Amount
Input your AUD dollar amount. The calculator processes your input in real-time, displaying a breakdown of the net and tax components as you type.
See Breakdown
Switch the GST toggle ON (10%) for standard taxable items or OFF (0%) for GST-free food and residential rent to see your calculated totals.
GST Calculator
Australian Goods and Services Tax at 10%
At a Glance
Since 1 July 2000
Annual taxable supplies
Monthly, quarterly, or annual
Food, healthcare, education
Amount Breakdown
How GST Is Calculated
Australian GST is a flat-rate value-added tax applied at each stage of the supply chain. The rate of 10% has been in effect since 1 July 2000. Unlike income tax, GST is the same rate regardless of the transaction amount — making calculation straightforward.
GST Amount = Price × 0.10
Total = Price × 1.10
Example: $100 × 1.10 = $110.00
Base Price = Total ÷ 1.10
GST Amount = Total − Base
Example: $110 ÷ 1.10 = $100.00
What Is (and Isn't) Subject to GST
GST-Free (0%) Supplies
- ✓ Basic food (bread, milk, fruit, vegetables)
- ✓ Most healthcare & medical services
- ✓ Education courses & childcare
- ✓ Exports of goods & services
- ✓ Residential rent & some financial services
GST Applies (10%) To
- • Most goods sold in Australia
- • Professional services (accounting, legal)
- • Restaurants, cafes & takeaway food
- • Commercial rent
- • New residential property sales
GST Filing Deadlines (BAS)
GST is reported through a Business Activity Statement (BAS). The ATO assigns a filing frequency based on your annual turnover. Late lodgement incurs a Failure to Lodge (FTL) penalty — one penalty unit per 28-day period, up to 5 periods.
| Filing Frequency | Who It Applies To | Due Date | Example |
|---|---|---|---|
| 1-monthly | Annual turnover > $20 million | 21st of the following month | Jan BAS due 21 Feb |
| Quarterly | Annual turnover < $20 million (standard) | 28th of month after quarter end | Jul–Sep BAS due 28 Oct |
| Annual | Annual turnover < $75,000 (elected) | 31 October each year | Full FY return due 31 Oct |
Key Quarterly BAS Due Dates
* Businesses lodging through a registered tax agent or BAS agent may receive a 4-week extension on quarterly due dates. Always confirm your specific due date with the ATO or your agent.
GST Rate History
Australia introduced GST on 1 July 2000 as part of the Howard government's A New Tax System reform package. Unlike New Zealand — which changed its rate twice — Australia's GST rate has remained unchanged since introduction.
Why has Australia's GST rate stayed at 10%? Changing the GST rate or broadening its base requires unanimous agreement from all state and territory governments — a high political bar. Multiple independent reviews, including the 2010 Henry Tax Review and 2016 consultations, have examined rate increases, but no change has ever been legislated.
For educational purposes only. This calculator is designed to help you understand how Australian GST works. Results are estimates based on the inputs you provide and may not reflect your actual GST liability.
This tool does not constitute financial or tax advice. Your individual GST situation may differ due to specific exemptions, concessions, or rulings that apply to you. Always consult a registered tax agent or BAS agent for personalised advice.
All GST rates and thresholds are sourced from the Australian Taxation Office (ATO) and are verified for 2025–26. The standard GST rate of 10% has been unchanged since 1 July 2000. Rates are subject to change — always verify current rates directly with the ATO.
Superannuation contributions are linked to your income. Use the super calculator to see how your salary affects your contributions and projected retirement balance.
Frequently Asked Questions
Everything you need to know about Good & Service tax in Australia.
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About this calculator
This calculator provides an estimate based on public ATO tax brackets. We don’t store your data. This is not financial advice. For official information, please refer to the Australian Taxation Office website.