How to use this australia gst calculator
- Enter the amount in A$.
- Choose whether that amount is inclusive or exclusive of GST.
- Select the GST rate, then click Calculate.
- Review the receipt-style breakdown on the right, then hit Clear whenever you want to start over.
What is GST in Australia?
Australia charges 10% GST across most goods and services, though basic food, health, education, and exports stay GST-free under ATO rules.
Forward and reverse formulas
When you already know the price excluding tax:
When you only have the tax-inclusive price, work backward instead:
Example at 10%
Say the price excluding GST is A$1,000. The tax comes to A$100.00, which puts the price including tax at A$1,100.00.
Australia tax reference
Confirm current Australia rates, exemptions, and filing rules with the Australian Taxation Office (ATO) before lodging returns. This calculator uses headline standard rates for estimation only.
GST vs sales tax vs VAT
Goods and services tax (GST) and value-added tax (VAT) are both multi-stage consumption taxes that give registered businesses an input-tax credit along the way. Sales tax, more common in the United States, usually gets charged just once at retail. This calculator sticks to single-rate GST/VAT math, so double-check exemptions and filing rules with your local revenue authority before relying on it for anything official.
More GST calculators
Explore country-specific and rate-specific GST tools, or read the full GST calculator guide for formulas and jurisdiction notes.
- By country
- By rate ($)
Also see our Sales Tax Calculator for U.S. state and local rates.