Australia GST Calculator

Add or remove GST at Australia’s 10% standard rate — net, GST and gross, instantly. Free, no signup.

GST rate
Net
$1,000.00
GST @ 10%
$100.00
Gross
$1,100.00

GST in Australia: the essentials

  • Standard rate: 10%
  • Registration: A$75,000 (A$150,000 for non-profits)
  • Return: BAS, filed quarterly with the ATO
  • E-invoicing: Peppol e-invoicing (government-backed)
  • Corporate tax: 25% base-rate entities / 30%

How to calculate GST in Australia

  1. Enter the amount. Type the amount — your net figure to add GST, or a tax-inclusive figure to remove it.
  2. Choose add or remove GST. Switch between adding GST to a net price and backing it out of a gross price.
  3. Pick the rate. Select the GST rate (default 10%).
  4. Read the result. See the net, GST amount and gross total update instantly.

Stop calculating GST by hand

KARR applies Australia’s GST automatically on every invoice, tracks the registration threshold, and prepares the return — flagging non-compliance before you file.

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Frequently asked questions

What is the GST rate in Australia?

The standard GST rate in Australia is 10%.

How do I calculate GST in Australia?

To add GST, multiply the net amount by the rate. At 10%, a 1000 net becomes 1100.00 gross. To remove GST from a tax-inclusive price, divide it by 1.100. This calculator does both instantly.

When must I register for GST in Australia?

Registration: A$75,000 (A$150,000 for non-profits), filed with the ATO.

Is this Australia GST calculator free?

Yes — it is completely free, needs no signup, and runs entirely in your browser. For automatic GST on every invoice and one-click returns, try KARR.

Read the full Australia GST & tax guides →

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Rates shown reflect Australia’s published GST rates and are provided for guidance only — confirm the rate for your specific supply. Not tax advice.