New Zealand GST Calculator
The New Zealand GST calculator adds or removes the standard 15% rate. It is an estimate for planning. Reduced, zero, and exempt rates are not included.
New Zealand standard GST 15%
Price
Total
NZ$115.00
Net
NZ$100.00
GST
NZ$15.00
Formula
Tax added to a price is the price times 15 divided by 100. The total is the price plus that tax.
Tax removed from a price that already includes it is the price divided by 1 plus the rate. The tax is the difference between the price you typed and the net.
This estimate uses the standard rate only. Some goods and services are reduced, zero-rated, or exempt.
Add: tax = amount × rate / 100. Remove: net = amount / (1 + rate / 100).
- amount The price you type, either before tax or including it.
- rate The standard GST rate for New Zealand, 15%. It is fixed on this page.
Worked example
A price of NZ$100.00 before GST at 15% adds NZ$15.00 of tax. The total is NZ$115.00.
Removing GST from NZ$115.00 leaves a net of NZ$100.00.
FAQ
How do I add 15% GST in New Zealand?
Multiply the price before tax by 15 and divide by 100. On NZ$100.00, the tax is NZ$15.00 and the total is NZ$115.00.
How do I remove GST from a price in New Zealand?
Divide the tax-inclusive price by 1 + 15/100. On NZ$115.00, the net is NZ$100.00 and the tax is NZ$15.00.
Does the New Zealand page use reduced rates?
No. It uses the standard 15% rate only. Reduced, zero-rated, and exempt supplies are not calculated.
Related calculators
Rate checked November 11, 2026 against Inland Revenue New Zealand.
This estimate uses the standard rate only. Some goods and services are reduced, zero-rated, or exempt.