GST calculator
Add 15% GST to a price, or work out how much GST is inside a GST-inclusive total. New Zealand rates, the exact figures Inland Revenue expects. No sign-up.
Running a business? Wrightly tracks your real GST automatically from your receipts and invoices, all year.
- Amount excluding GST
- $100.00
- GST (15%)
- $15.00
- Amount including GST
- $115.00
Adding and removing GST, by hand
Adding GST to a price
GST is 15%, so multiply the GST-exclusive amount by 1.15. A $100 service becomes $115, and $15 of that is GST.
Finding the GST inside a total
To pull the GST out of a GST-inclusive total, multiply by 3 and divide by 23 (the same as 15 ÷ 115). From $115 that is $115 × 3 ÷ 23 = $15, leaving $100 excluding GST.
When you need to register
You must register for GST once turnover passes $60,000 in any 12-month period. Below that, registering is optional. Some sole traders register voluntarily to claim GST back on purchases.
GST questions
- How much is GST in New Zealand?
- GST in New Zealand is a flat 15%. It has been 15% since 1 October 2010, when it rose from 12.5%.
- How do I add GST to a price?
- Multiply the GST-exclusive amount by 1.15. For example, $100 plus GST is $100 × 1.15 = $115, of which $15 is GST.
- How do I remove GST from a GST-inclusive price?
- To find the GST content of a GST-inclusive total, multiply it by 3 and divide by 23 (the same as 15 ÷ 115). For example, $115 × 3 ÷ 23 = $15 of GST, leaving $100 excluding GST.
- When do I need to register for GST?
- You must register for GST once your turnover passes $60,000 in any 12-month period, or if you already charge GST in your prices. Below $60,000 you can still register voluntarily.
- Do sole traders have to charge GST?
- Only if you are GST-registered. Once registered you add 15% GST to your sales and can claim back the GST on your business purchases; if you are not registered, you neither charge nor claim GST.
Wrightly is record-keeping software, not tax advice. For your own situation, check ird.govt.nz/gst or your accountant.