GST Calculator New Zealand
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Free GST Calculator is an online tool for calculating Goods and Services Tax (GST) in New Zealand. It is built for individuals, businesses and accountants who want a simple, efficient and reliable way to handle GST calculations.

The calculator handles GST-inclusive and GST-exclusive amounts and returns results instantly, with just a few clicks. Everything runs in your browser, so there is no account to create and nothing to send to a server. Whether you are a first-time freelancer or an accounting firm, the interface is designed to be easy to use without financial expertise.

Use our calculator

If you want to calculate GST, use thefree calculator on the home page. It adds 15% to a GST-exclusive amount, takes 3/23 of a GST-inclusive amount and works back from a GST amount, at the current New Zealand rate.

Need more info on NZ GST?

Check out our guides, which cover topics from manually calculating GST to calculating GST in Excel.

  • What is GST in NZ?

    What Goods and Services Tax covers in New Zealand and how the Inland Revenue Department administers it.

  • How to calculate GST?

    Work out the GST-exclusive price, the GST-inclusive price and the GST component from any amount.

  • How to calculate GST in Excel?

    Build spreadsheet formulas that calculate the GST-inclusive and exclusive price and the GST amount.