GST Tax Calculator New Zealand
Add GST, strip it back out, or work out the GST content of any price — instantly. Type in an amount and we’ll do the 15% maths for you. No spreadsheets, no second‑guessing.
- Add or remove GST at New Zealand’s 15% rate
- Find the GST content of a GST-inclusive price
- Free, instant, and works on mobile or desktop
New Zealand GST rate: 15%
Results update as you type. Figures are a guide, not tax advice.
How to calculate GST in New Zealand
GST (Goods and Services Tax) in New Zealand is a flat 15%. Whether you’re pricing a job, checking a supplier invoice, or sorting your GST return, there are really only two GST calculations you ever need — and the calculator above does both.
Here’s the plain-English version so you can see the workings, then do it by hand or by calculator whenever you like.
Adding GST to a price
Got a GST-exclusive amount and need the total? Multiply by 1.15. To find just the GST portion, multiply by 0.15.
$100 × 0.15 = $15 GST
$100 × 1.15 = $115 total
Removing GST & the GST content
When a price already includes GST, divide by 1.15 for the GST-exclusive amount. The GST content is the inclusive price × 3 ÷ 23.
$115 ÷ 1.15 = $100 excl.
$115 × 3 ÷ 23 = $15 GST content
That’s the whole GST calculation. This free GST tax calculator just saves you reaching for a spreadsheet — switch mode, type the figure, and the GST-inclusive total, the net figure and the GST component all update on the spot.
Common GST amounts at a glance
A quick NZ GST reference for round numbers. Need a figure that isn’t here? The calculator handles any amount.
| Amount (excl. GST) | GST (15%) | Total (incl. GST) |
|---|---|---|
| NZ$10.00 | NZ$1.50 | NZ$11.50 |
| NZ$50.00 | NZ$7.50 | NZ$57.50 |
| NZ$100.00 | NZ$15.00 | NZ$115.00 |
| NZ$250.00 | NZ$37.50 | NZ$287.50 |
| NZ$500.00 | NZ$75.00 | NZ$575.00 |
| NZ$1,000.00 | NZ$150.00 | NZ$1,150.00 |
| NZ$5,000.00 | NZ$750.00 | NZ$5,750.00 |
GST in New Zealand, explained
A quick, plain-English guide to how Goods and Services Tax works here — so the figures from this handy GST calculator make sense in context, not just on screen.
What does GST stand for?
GST stands for Goods and Services Tax — a tax added to most goods and services sold across the country. The current GST rate is 15%, and it has sat there since 1 October 2010. A few categories are treated differently (more on those below), but for the vast majority of everyday sales, 15% is the number.
Because the GST rate is a flat 15%, the maths never changes — only the figure you start with does. That’s exactly what this GST tax calculator takes care of for you.
GST-inclusive vs GST-exclusive prices
A GST-exclusive price is the amount before tax; a GST-inclusive price is what the customer actually pays once 15% is added. Switch to Add GST to turn an exclusive figure into a GST-inclusive total, or Remove GST to find the GST component tucked inside an inclusive total.
To find the GST portion of a tax-inclusive figure by hand, multiply the total price by 3 and divide by 23. To subtract GST and get back to the original price, divide by 1.15. The Remove GST mode does both at once.
Do you need to register for GST?
You must register for GST if your turnover tops NZ$60,000 in any 12-month period — or you expect it to. Below that threshold it’s optional, and plenty of sole traders and small businesses choose to wait. Once you’re a GST-registered business you get a GST number, charge 15% on your sales, and collect that GST on Inland Revenue’s behalf.
If you’re a sole trader weighing it up, remember that registering also lets you claim GST back on what you buy — which can be worth more than the admin it adds.
Filing GST returns and paying Inland Revenue
Registered businesses file GST returns with Inland Revenue each taxable period — usually two-monthly or six-monthly, depending on turnover and what you chose when you registered. Each return works out your net GST payable: the GST you collected on sales, minus the GST you paid on expenses.
Collected more than you paid? You pay the difference to the Inland Revenue Department by the due date. Paid more than you collected? You’re due a GST refund. Either way, knowing the GST content of every sale and expense is what makes return time painless.
What GST applies to (and what’s exempt)
Most goods and services carry 15% GST, but a few categories are treated differently. Zero-rated supplies — like exported goods, or selling a business as a going concern — have GST charged at 0%. Exempt supplies, such as residential rent and most financial services, have no GST at all.
It’s a useful distinction: a GST-exempt sale and a zero-rated one can look similar on a receipt but behave very differently on your GST return.
Claiming GST back on business expenses
When you’re registered you can claim GST back on most business expenses — office supplies, software, tools, bank fees and other business-related expenses all count, as long as you’ve kept a valid receipt. Drop a tax-inclusive expense into Remove GST and it shows the GST paid that you can claim.
Just remember that anything used privately — or for exempt activities like residential rent — can’t be claimed in full, so apportion mixed-use costs fairly.
This guide and calculator are general information, not tax advice. GST rules can change and special cases apply — check with Inland Revenue or your accountant for your own situation.
Stop doing GST maths by hand
This calculator is handy for one-off sums. But if you’re registered for GST in New Zealand, Joy Pilot tracks it for you automatically — every invoice and expense, GST split out as you go, with a running total of what you owe. No spreadsheets, no surprises at return time.
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GST calculator questions
Everything you might wonder about calculating GST in NZ.
GST in New Zealand is 15%. It has been 15% since 1 October 2010, and it applies to most goods and services. This calculator uses the 15% NZ GST rate for every result.
To add GST, multiply the GST-exclusive amount by 1.15 — or multiply by 0.15 to get just the GST part. Example: $100 + GST = $100 × 1.15 = $115, of which $15 is GST. Or pop the amount into the calculator above and switch to “Add GST”.
When a price already includes GST, the GST content is the GST portion baked into it. Divide the GST-inclusive amount by 1.15 to get the amount excluding GST, then the difference is the GST. The shortcut: GST content = inclusive amount × 3 ÷ 23. Example: $115 includes $15 of GST. Use “Remove GST” above to do it instantly.
Yes — completely free, no sign-up, no limits. It is an online GST calculator you can use as often as you like, on your phone or desktop, whenever you need to calculate GST in NZ.
You must register for GST if your turnover is over NZ$60,000 in any 12-month period (or you expect it to be). Below that, registering is optional. Once registered, you charge 15% GST on your sales and file regular GST returns with Inland Revenue.
Both. Use “Add GST” when your figure excludes GST and you want the total. Use “Remove GST” when your figure already includes GST and you want the GST content plus the GST-exclusive amount. It handles either GST calculation in a click.
GST stands for Goods and Services Tax. It is a 15% tax added to most goods and services in New Zealand, collected by GST-registered businesses on behalf of Inland Revenue.
Most businesses file GST returns either two-monthly or six-monthly, depending on turnover and the taxable period they chose. Each return reports the GST you collected on sales and the GST you paid on expenses — the difference is your net GST payable to Inland Revenue (or a GST refund if you paid more than you collected).
If you are GST-registered, yes. You can claim the GST paid on most business expenses — office supplies, software, tools and bank fees among them — as long as you keep a valid receipt. Use “Remove GST” above to find the GST content of any expense.
Sole trader or contractor? GST is only half the picture. See our plain-English guide to provisional tax in New Zealand for who pays it, the instalment dates and how it’s worked out.