How this GST Calculator helps you

New Zealand applies a standard 15% GST to most goods and services. This calculator helps you:

  • Convert a GST-exclusive price to a GST-inclusive total (Add 15%).
  • Reverse a GST-inclusive price to find the GST-exclusive base (Divide by 1.15).
  • Generate quick invoice figures and payments for business use.

Related tools & reference

We link to other helpful tax calculators and resources. External links are visible and trusted.

Helpful external tool:

Visit the UK VAT calculator for UK-specific VAT rules and reverse VAT examples: VATCalculatorUK.net

When to use GST Calculator NZ

Use this tool when preparing invoices, quoting prices, or reconciling receipts. If you are a business and your turnover exceeds the threshold, you must register for GST — see the IRD for official rules.

Quick FAQ

What is the GST rate in New Zealand?

15% standard GST.

How do I calculate GST-inclusive from exclusive?

Multiply the amount by 1.15 or add 15%.

How do I get the exclusive price from an inclusive total?

Divide the inclusive total by 1.15.

If you want a printable invoice format or CSV export built into the tool, tell me and I’ll add it.