New Zealand GST Calculator
Add or remove New Zealand GST at 15% — the GST in an inclusive price is 3/23.
NZ GST rate last updated · reference source
Loading calculator…
Currency: Amounts are calculated in the currency you select; this site does not convert between currencies and does not use live exchange rates.
Dated static reference; no live data is fetched. Verify current source values and assumptions before relying on results.
What this tool does
Calculates New Zealand goods and services tax at the static 15% rate, adding GST to a GST-exclusive price or extracting the 3/23 GST fraction from a GST-inclusive price.
How to use the New Zealand GST Calculator
- Enter the amount in your own currency.
- Choose whether the amount already includes GST or not.
- Select the applicable rate.
- Read the net amount, GST and gross total; copy or print the result.
Formula
GST = net × 0.15; GST in inclusive price = gross × 3/23; net = gross ÷ 1.15
- net
- GST-exclusive price
- gross
- GST-inclusive price
Worked example
A $345 GST-inclusive bill: multiply by 3/23 to find the GST.
Inputs
- Amount$345
- Amount entered isGross — tax already included (remove tax)
Result
- Net amount (excl. GST)$300.00
- GST$45.00
- Gross amount entered$345.00
New Zealand GST quick reference
| Item | Value |
|---|---|
| GST rate | 15% |
| GST fraction of inclusive price | 3/23 |
| Registration threshold | $60,000 in 12 months |
Results explained
- Net amount
- Price before GST.
- GST
- GST payable at the selected static rate.
- Gross amount
- Price including GST.
Frequently asked questions
Multiply by 3 and divide by 23. $115 × 3/23 = $15 GST.
15% on most goods and services, since 1 October 2010.
When turnover is, or is expected to be, over $60,000 in a 12-month period.
Exports and some land transactions between registered persons are zero-rated; financial services and residential rent are exempt.
No. The 15% rate is stored in a dated static table and all calculations happen in your browser.