How to use the New Zealand GST Calculator
Enter the amount and GST rate and the result appears straight away. Everything runs in your browser, so nothing you type is uploaded.
The formula
GST-exclusive: net × rate. GST-inclusive: gross × rate ÷ (1 + rate).
Examples
- With the default values
Net amount: NZ$100.00 Tax at 15.00%: NZ$15.00 Gross amount: NZ$115.00
- With amount set to 200
Net amount: NZ$200.00 Tax at 15.00%: NZ$30.00 Gross amount: NZ$230.00
Limitations and assumptions
Some supplies have special zero-rated or exempt treatment; this tool only performs the arithmetic. This is an implementation preview based on the linked official source; it has not yet received independent professional review. Do not use as a tax filing, payroll or legal determination.
Frequently asked questions
What does the New Zealand GST Calculator do?
Add or extract New Zealand GST at the standard 15% rate, or enter a different rate.
How does the New Zealand GST Calculator work?
Enter the amount and GST rate and the result appears straight away. Everything runs in your browser, so nothing you type is uploaded.
What formula does the New Zealand GST Calculator use?
GST-exclusive: net × rate. GST-inclusive: gross × rate ÷ (1 + rate).
What should I keep in mind when using the New Zealand GST Calculator?
Some supplies have special zero-rated or exempt treatment; this tool only performs the arithmetic. This is an implementation preview based on the linked official source; it has not yet received independent professional review. Do not use as a tax filing, payroll or legal determination.
Can I see an example of the New Zealand GST Calculator?
New Zealand’s standard GST rate is 15%.
Is the New Zealand GST Calculator free to use?
Yes. It is free, needs no account and runs in your browser.
Reference source
Checked against the official reference on ird.govt.nz.
Source link and effective period are shown for transparency. This does not replace professional review.