Free tools
Free New Zealand GST and invoice calculators
GST at 15% added to or taken out of a price (3/23), GST number checks, GST return due dates and hourly totals. The GST and hourly results open as a ready New Zealand invoice, free and without sign-up.
Calculators
- GST calculatorAdd 15% GST to a price or take it out of a GST-inclusive price (3/23), then open it as a ready New Zealand tax invoice. Free, instant, no sign-up.
- GST number checkerCheck a New Zealand GST (IRD) number: 8 or 9 digits and Inland Revenue’s mod 11 check digit, in your browser. Nothing you type is sent anywhere.
- GST return due date calculatorFind when your New Zealand GST return is due: the 28th of the month after the period, 15 January after November, 7 May after March.
- Hourly rate calculatorMultiply hours by your rate and add 15% GST if you’re registered, then open it as a ready New Zealand tax invoice. Free, instant and no sign-up.
Frequently asked questions
Are these calculators free?
Yes, all of them, with no sign-up. They run in your browser: nothing you enter is sent to us.
Can I turn a result into an invoice?
Yes. The GST and hourly calculators have a button that opens our free New Zealand invoice generator with the amount filled in. Add your GST number and your client, and download the PDF.