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GST Calculator (Australia)
Work out 10% GST in seconds. Add GST to a price, or pull the GST out of a GST-inclusive amount.
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Amount (ex. GST)$0.00
GST (10%)$0.00
Total (incl. GST)$0.00
How GST works in Australia
GST (Goods and Services Tax) is a flat 10% on most goods and services. If your business earns $75,000+ a year you must register for GST and charge it on your invoices.
- Add GST: price × 1.1
- GST portion of an inclusive price: price ÷ 11
- Remove GST: price ÷ 1.1
Stop working out GST by hand
Admin Substitute puts GST on every quote and invoice automatically, tracks what you owe the ATO, and chases the money for you.
- Quotes & invoices sent in seconds
- Auto chase overdue invoices
- GST & ABN handled for you
- Built for Aussie tradies
30-day money-back guarantee · No lock-in contracts · 90% cheaper than hiring an admin