Net Amount (excl. GST)
$0.00
GST Component (10%)
$0.00
Total (incl. GST)
$0.00
$0.00 × 1.1 = $0.00 · Net × 1.1 = GST-inclusive total
✓ Results copied to clipboard!
Instantly add or remove 10% GST from any amount. Trusted by accountants, sole traders, and businesses across Australia.
| Description | Qty | Unit Price (ex GST) | GST (10%) | Total (inc GST) | |
|---|---|---|---|---|---|
| Totals | $0.00 | $0.00 | $0.00 | ||
You must register for GST when your annual business turnover reaches $75,000 (or $150,000 for non-profits). You can voluntarily register below this threshold to claim GST credits on purchases. Register via ATO ↗
The Goods and Services Tax (GST) is a broad-based consumption tax of 10% levied 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 system. GST is governed by the A New Tax System (Goods and Services Tax) Act 1999 and administered by the Australian Taxation Office (ATO).
GST is an indirect tax — businesses collect it from customers on behalf of the government, then remit the net GST (GST collected minus GST credits claimed on purchases) via their Business Activity Statement (BAS). As the end consumer, you ultimately bear the cost of GST in the price of goods and services.
In the 2024–25 financial year, the Australian government collected over $75 billion in GST revenue, which is distributed to states and territories to fund essential services including healthcare, education, and infrastructure.
There are two core calculations: adding GST to a net (ex-GST) amount, and removing GST from a gross (GST-inclusive) amount.
➕ Adding GST (Net → Gross)
GST Amount = Net Price × 0.10
Gross Price = Net Price × 1.10
Example: $500 × 1.10 = $550 (GST component = $50)
➖ Removing GST (Gross → Net)
Net Price = Gross Price ÷ 1.10
GST Component = Gross Price − (Gross Price ÷ 1.10)
Example: $550 ÷ 1.10 = $500 (GST component = $50)
The ATO recommends rounding GST to the nearest cent on tax invoices. For BAS purposes, always use the divide by 11 shortcut to find the GST included in any GST-inclusive price — this is mathematically equivalent to dividing by 1.1.