How much is GST in NZ?
GST in New Zealand is 15%. To add GST to a price, multiply it by 1.15. To find the GST inside a price that already includes it, multiply the price by 3 and divide by 23. On $100.00 plus GST you pay $115.00; a $100.00 price that includes GST has $13.04 of GST in it.
How to use this NZ GST calculator
It handles quick GST calculations both ways. Pick Add GST when you have a price without GST, or Remove GST when you have a total that already includes it. The calculator shows the price without GST, the GST amount and the price with GST, rounded to the cent. The rate starts at 15% and you can change it. Press Print result for a one-page copy.
How to calculate GST in NZ
Calculating GST in NZ takes one step each way, as long as you know whether your amount already includes GST. A price without GST is GST-exclusive and a price with GST is GST-inclusive. Taking GST back out of a total is sometimes called a reverse GST calculation.
Adding GST to a price
GST is 15% of the price without GST. On $1,000.00 that is $150.00, so the total is $1,150.00.
Removing GST from a total
Inland Revenue uses the GST fraction, 3 over 23. On $2,000.00 including GST, the GST is $2,000.00 x 3 ÷ 23 = $260.87, and the price without GST is $1,739.13. The fraction gives an exact answer, where dividing by 1.15 by hand depends on how many decimals you keep. Taking 15% off a GST-inclusive price gives the wrong figure.
GST on common amounts
At 15%. The left half adds GST to a price; the right half finds the GST inside a price that already includes it.
| Amount | GST to add | Price with GST | GST inside it | Price without GST |
|---|---|---|---|---|
| $10.00 | $1.50 | $11.50 | $1.30 | $8.70 |
| $20.00 | $3.00 | $23.00 | $2.61 | $17.39 |
| $50.00 | $7.50 | $57.50 | $6.52 | $43.48 |
| $100.00 | $15.00 | $115.00 | $13.04 | $86.96 |
| $200.00 | $30.00 | $230.00 | $26.09 | $173.91 |
| $250.00 | $37.50 | $287.50 | $32.61 | $217.39 |
| $500.00 | $75.00 | $575.00 | $65.22 | $434.78 |
| $1,000.00 | $150.00 | $1,150.00 | $130.43 | $869.57 |
| $2,000.00 | $300.00 | $2,300.00 | $260.87 | $1,739.13 |
| $5,000.00 | $750.00 | $5,750.00 | $652.17 | $4,347.83 |
| $10,000.00 | $1,500.00 | $11,500.00 | $1,304.35 | $8,695.65 |
When a business must register for GST
A business has to register when its turnover was over $60,000 in the last 12 months, or is expected to go over $60,000 in the next 12 months. A business under that can still choose to register. Once registered, it adds GST to its prices and files GST returns with Inland Revenue.
NZ GST calculator: questions people ask
- What is the GST rate in New Zealand?
- 15%. Inland Revenue says GST is usually 15%, and the rate has been 15% since 1 October 2010. It is charged on most goods and services.
- How do I take GST out of a price that already includes it?
- Multiply the total by 3 and divide by 23 to get the GST, then subtract it from the total. For $100.00 including GST, the GST is $13.04 and the price without GST is $86.96. Inland Revenue recommends this fraction because it is exact, where dividing by 1.15 by hand needs many decimal places.
- How do I add GST to a price?
- Multiply the price by 0.15 to get the GST, then add it. $1,000.00 plus GST is $1,150.00.
- Is everything charged GST?
- No. Exempt supplies carry no GST, and Inland Revenue's examples include financial services such as loan interest and bank fees, and rent paid on a private home. Some supplies are zero-rated, which means GST is charged at 0%, such as exported goods. Check Inland Revenue's guidance for your case.
- Can I use a different rate?
- Yes. The rate box starts at 15% and you can change it, for example to work out a quote at another percentage. New Zealand GST itself is 15%.
- Does the calculator keep my figures?
- No. It runs in your browser. If you press Copy link, the amount and rate go into the web address so the link reopens the same result.
Where the figures come from
Checked on 13 November 2026 against Inland Revenue's GST guide and website. This is a calculator for quick sums, so keep your tax invoices and check the rules with your accountant or Inland Revenue for GST returns.
- GST guide IR375, March 2026. The 15% rate, the 3 over 23 fraction, the $60,000 registration test, exempt and zero-rated supplies.
- GST on ird.govt.nz. The 15% rate.
- Registering for GST. When a business has to register.
- Charging GST. Adding and removing GST.
- GST rate increase, Inland Revenue Tax Technical. The change to 15% in 2010.