GST calculator (NZ)
Add GST to a price, or work out the price before GST.
- Type the amount.
- Choose “Add GST” or “Remove GST”.
- See the tax and the total straight away.
- Total with tax
- $115.00
- GST (15%)
- $15.00
- Before tax
- $100.00
- After tax
- $115.00
NZ GST rates
| Rate | GST | Used for |
|---|---|---|
| GST | 15% | most goods and services |
How to add GST
Multiply the price by 1.15. For example, $100.00 + 15% GST = $115.00.
How to remove GST
Divide the total by 1.15. It is not the same as taking 15% off. For example, $120.00 ÷ 1.15 = $104.35 before GST.
Quick NZ method: the GST inside a GST-inclusive price is 3/23 of it. $115.00 × 3 ÷ 23 = $15.00.
GST at 15%: quick table
| Price before tax | GST | Price with tax | If $amount includes GST: before tax |
|---|---|---|---|
| $10.00 | $1.50 | $11.50 | $8.70 |
| $20.00 | $3.00 | $23.00 | $17.39 |
| $50.00 | $7.50 | $57.50 | $43.48 |
| $100.00 | $15.00 | $115.00 | $86.96 |
| $200.00 | $30.00 | $230.00 | $173.91 |
| $500.00 | $75.00 | $575.00 | $434.78 |
| $1,000.00 | $150.00 | $1,150.00 | $869.57 |
| $5,000.00 | $750.00 | $5,750.00 | $4,347.83 |
More NZ calculators
Frequently asked questions
How do I calculate 15% GST?
Multiply the price by 0.15. To get the total including GST, multiply by 1.15.
How do I take GST off a price?
Divide the price including GST by 1.15. The difference is the GST.
What is the GST rate in New Zealand?
The standard rate is 15%.
When do I have to register for GST?
When your taxable turnover goes over $60,000.
Where our numbers come from
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Rates checked against official sources on 2026-09-29.