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GST Calculator

Australia's GST rate is 10%. To calculate GST on a price that excludes it, multiply by 0.10. To calculate the GST inside a price that already includes it, divide by 11. This GST calculator does both, and the result is the GST amount.

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Calculated GST

$ 0.00

How it's calculated

Add GST multiplies the amount you enter by 10%. On $100 exclusive of GST, the GST is $10 and the GST-inclusive price is $110. The figure shown is the $10, not the $110.

Subtract GST divides a GST-inclusive amount by 11. On $110 including GST, the GST is $10. Dividing by 10 instead of 11 overstates the GST.

The 10% rate applies to taxable sales. It does not apply to GST-free supplies, such as many basic foods, or to input-taxed supplies, such as residential rent.

Checked 2 November 2026 against the ATO:

Ezyiah codes GST on reconciled transactions and prepares BAS for Australian accounting firms and business owners.

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FAQs

What is the GST rate in Australia?

10%. Australia's Goods and Services Tax has been 10% since it was introduced on 1 July 2000. It applies to most goods and services sold or consumed in Australia.

How do I remove GST from a price that already includes it?

Divide the total by 11. If your invoice is $1,100, the GST component is $1,100 ÷ 11 = $100. The pre-GST amount is $1,000. Do not multiply by 10% — that gives the wrong answer.

When does a business have to register for GST in Australia?

When your annual GST turnover reaches or is likely to reach $75,000 ($150,000 for non-profits). Taxi and ride-share drivers must register regardless of turnover. Once registered, you must charge GST on taxable sales and lodge a BAS.

Which goods and services are GST-free in Australia?

Basic food (fresh fruit, vegetables, meat, bread), most medical and health services covered by Medicare, some education courses, exports, and some government charges. Always check the ATO's current list — assumptions can be wrong and penalties apply.