GST calculator for Australia
GST in Australia is 10%, so the GST in a GST-inclusive price is one-eleventh of it: $110 includes $10 of GST on a $100 price.
Enter any amount to add GST to it or take GST out of it.
How it's worked out
Adding GST: price × 10% = GST; price × 1.1 = total. Removing GST: total ÷ 11 = GST; total ÷ 1.1 = price before GST. Amounts are shown to the cent; on tax invoices, round GST to the nearest cent.
Worked example: $110 including GST
Taking GST out of a $110 price:
| Result | Amount |
|---|---|
| Price excluding GST | $100.00 |
| GST at 10% | $10.00 |
| Price including GST | $110.00 |
How to use the GST Calculator Australia
- Enter the amount.
- Choose whether to add GST to it or remove GST from it.
Key figures 2026–27
The statutory rates and thresholds this calculator uses, where each comes from, and when we last checked it.
| Figure | Value | Source and date checked |
|---|---|---|
| GST rate | 10%; registration from $75,000 GST turnover | How GST worksChecked 2026-11-05 |
Frequently asked questions
How do I work out GST from a GST-inclusive price?
Divide the price by 11. For $550 that is $50 of GST and a $500 price before GST.
How do I add GST to a price?
Multiply by 1.1. A $200 price becomes $220, of which $20 is GST.
When does a business have to register for GST?
When its GST turnover is $75,000 or more ($150,000 for non-profits). Taxi and ride-sourcing drivers must register whatever their turnover.
Is everything taxed at 10%?
No. Some items are GST-free (most basic food, some health and education) and some are input-taxed (such as residential rent and most financial supplies).
Is this tax advice?
No. Results are estimates from the published ATO and Fair Work rules for the cases the calculator covers. Your own circumstances can change the result; check with the ATO, Fair Work or a registered tax agent before you rely on a figure.
Sources
- How GST works (Australian Taxation Office)
- Registering for GST (Australian Taxation Office)
Estimates, not tax or legal advice. Results come from the published rules for the cases this calculator covers in 2026–27; your own circumstances can change them. Check with the official source: ATO GST information.
Last checked 2026-11-05 by the TakeHomeWorld editors · How we calculate and check rates · Runs entirely in your browser; nothing you type is stored.