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Calculate GST instantly with our free online calculator. Add, remove, or reverse GST calculations for both Australia (10%) and New Zealand (15%). Export results to PDF or CSV.
Instant GST calculations with support for multiple modes: add, remove, reverse, and GST-only calculations.
Fast, accurate, and easy to use for businesses and individuals
Instant calculations with live results as you type. No waiting, no delays.
Add GST, remove GST, reverse calculate, or get GST amount only.
Switch seamlessly between Australia (10%) and New Zealand (15%) GST rates.
Export your calculations to PDF, CSV, or print directly from your browser.
Fully responsive design works perfectly on phones, tablets, and desktops.
All calculations happen in your browser. We don't store any of your data.
The Goods and Services Tax (GST) is a broad-based tax of 10% on most goods, services, and other items sold or consumed in Australia. Businesses with a GST turnover of $75,000 or more must register for GST.
Use Australia CalculatorGST applies to most goods and services sold or consumed in New Zealand. If your business has a GST turnover of $60,000 or more in a 12-month period, you must register for GST with the IRD.
Use New Zealand CalculatorCommon questions about GST in Australia and New Zealand
Choose your country and start calculating instantly