📍 South Australia (SA) — Key Financial Data 2025
Average house price: $650,000 | Average weekly rent: $540/week
Stamp duty note: SA has no FHB stamp duty exemption for established homes. First Home Owner Grant of $15,000 for new homes.
Fuel average: 178–212c/L | Minimum wage: $24.10/hr
GST Calculator for South Australia Residents — 2025
This calculator uses the same Australian-standard formulas as the national tool, with specific guidance for South Australia (SA) residents. Key SA-specific financial considerations are highlighted below.
South Australia Property Market — 2025 Overview
The South Australia property market in 2025 has an average house price of approximately $650,000 across the Adelaide metropolitan area, with regional SA properties typically trading at 20–40% below capital city prices. Average weekly rents in South Australia run approximately $540/week for houses, with units averaging 15–25% less.
South Australia Stamp Duty
SA has no FHB stamp duty exemption for established homes. First Home Owner Grant of $15,000 for new homes. Always verify current thresholds with the South Australia State Revenue Office or a licensed conveyancer before exchange.
Income Tax in South Australia
SA residents pay standard federal income tax. South Australia has no additional state income tax. The standard ATO federal income tax rates and thresholds apply to all SA residents.
GST in South Australia
Standard 10% GST applies across SA. Adelaide businesses typically lodge BAS quarterly.
South Australia Trade Rates (for hourly rate context)
| Trade | SA Rate (2025) |
|---|
| Paving | $78–$120/hr |
| Builder | $82–$132/hr |
| Electrician | $92–$140/hr |
Frequently Asked Questions
How do I remove GST from a price?
Divide the GST-inclusive price by 11 to find the GST component alone. Subtract from the total to get the ex-GST price. Example: $220 total ÷ 11 = $20 GST. Ex-GST price = $220 − $20 = $200. Or simply divide by 1.1 to get the ex-GST amount directly: $220 ÷ 1.1 = $200.
What is a valid tax invoice?
A tax invoice must include: your business name and ABN, the date, a description of the goods or services, the GST amount (or statement that GST is included), and the total amount payable. For amounts under $1,000, a simplified invoice can state the total includes GST of $X. For amounts $1,000 and over, the GST amount must be shown separately.
What is a Business Activity Statement?
A BAS (Business Activity Statement) is the form lodged with the ATO to report and pay net GST. Most small businesses lodge quarterly. The BAS shows GST collected on sales and GST credits on purchases; the difference is paid to (or refunded from) the ATO. You can lodge via myGov, the ATO business portal, or through a registered BAS agent.
Can I claim GST on a car purchase?
Yes, if the vehicle is used in your business. For vehicles with a GST-inclusive cost above the car limit ($69,674 for 2024-25), GST credits are capped at 1/11th of the car limit. For vehicles below the limit used partly for business, you claim the business-use proportion of the GST paid.