What is GST in New Zealand?
GST (Goods and Services Tax) is a 15% tax on most goods and services in New Zealand. If you're GST registered, you charge GST on your sales and claim it back on your business purchases. The IRD requires you to include GST in your prices and show it clearly on tax invoices.
Add GST or Remove GST?
Adding GST — When you have a price that doesn't include GST (e.g. you're quoting a job) and you need to add 15% to get the total your customer pays. Example: $100 + 15% GST = $115.
Removing GST — When you have a price that already includes GST and you need to work out the amount excluding GST (e.g. for your accounts or to claim back). Example: $115 including GST = $100 excluding GST.
Quick reference: 15% GST
To add GST: multiply by 1.15. To remove GST: divide by 1.15.
When Do You Need a GST Calculator?
NZ tradies, freelancers, and small businesses use a GST calculator when quoting jobs (add GST to get the total), when checking supplier invoices (remove GST to see the net amount), or when preparing tax returns. Getting the maths wrong can mean undercharging or overclaiming, so a quick, accurate tool saves time and keeps you compliant.
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Create free invoiceFrequently Asked Questions
What is the GST rate in New Zealand?
The GST rate in New Zealand is 15%. It applies to most goods and services supplied in NZ.
How do I add GST to a price?
Multiply the amount by 1.15, or add 15% to the original amount. For example, $100 + GST = $115.
How do I remove GST from a price?
Divide the GST-inclusive amount by 1.15. For example, $115 ÷ 1.15 = $100 (the amount excluding GST).
Is this GST calculator free?
Yes. The tool is free to use. No signup or account required.