NZ GST calculator and registration checker
Add or remove 15% GST in seconds, check whether you need to register, and keep your filing dates straight.
NZ GST calculator
- Excluding GST
- $100.00
- GST at 15%
- $15.00
- Including GST
- $115.00
GST registration checker
GST filing due dates
Your return and payment are both generally due on the 28th of the month after your period ends, with two exceptions:
- Periods ending 30 November are due on 15 January
- Periods ending 31 March are due on 7 May
Need more detail? Read the sole trader GST guide, and always check IRD for your own dates.
GST questions
How do I work out GST in NZ?
To add GST, multiply the price excluding GST by 1.15. To find the GST inside a GST-inclusive price, multiply it by 3 and divide by 23.
When do I have to register for GST?
You must register if your turnover was over $60,000 in the last 12 months, or is expected to go over $60,000 in the next 12 months.
When are GST returns due?
Returns and payments are generally due on the 28th of the month after your taxable period ends. Periods ending 30 November are due 15 January, and periods ending 31 March are due 7 May.
How often do I file GST?
You can file monthly, two-monthly or six-monthly, depending on your turnover and what you choose when you register. Two-monthly is the most common.
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