GST calculator (Australia)
Add GST to a price, or work out the price before GST.
- Type the amount.
- Choose “Add GST” or “Remove GST”.
- See the tax and the total straight away.
- Total with tax
- $110.00
- GST (10%)
- $10.00
- Before tax
- $100.00
- After tax
- $110.00
Australia GST rates
| Rate | GST | Used for |
|---|---|---|
| GST | 10% | most goods and services (basic food, most health and education are GST-free) |
How to add GST
Multiply the price by 1.1. For example, $100.00 + 10% GST = $110.00.
How to remove GST
Divide the total by 1.1. It is not the same as taking 10% off. For example, $120.00 ÷ 1.1 = $109.09 before GST.
GST at 10%: quick table
| Price before tax | GST | Price with tax | If $amount includes GST: before tax |
|---|---|---|---|
| $10.00 | $1.00 | $11.00 | $9.09 |
| $20.00 | $2.00 | $22.00 | $18.18 |
| $50.00 | $5.00 | $55.00 | $45.45 |
| $100.00 | $10.00 | $110.00 | $90.91 |
| $200.00 | $20.00 | $220.00 | $181.82 |
| $500.00 | $50.00 | $550.00 | $454.55 |
| $1,000.00 | $100.00 | $1,100.00 | $909.09 |
| $5,000.00 | $500.00 | $5,500.00 | $4,545.45 |
More Australia calculators
Frequently asked questions
How do I calculate 10% GST?
Multiply the price by 0.1. To get the total including GST, multiply by 1.1.
How do I take GST off a price?
Divide the price including GST by 1.1. The difference is the GST.
What is the GST rate in Australia?
The standard rate is 10%.
When do I have to register for GST?
When your taxable turnover goes over $75,000.
Where our numbers come from
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Rates checked against official sources on 2026-09-29.