Does a new build include GST?

Yes. A new build (a new home or section sold by a GST-registered developer) includes 15% GST in the price, unlike most existing homes sold by private owners, which are not subject to GST. So the headline price already has the GST built in.

How do I find the GST in a new build price?

The GST portion of a GST-inclusive price is the price multiplied by 3 and divided by 23. This calculator does that, and also shows the GST-exclusive build cost, which is useful for builders and developers pricing contracts.

Do I pay GST on top of a new build price?

Usually the advertised price is GST-inclusive, so you do not add GST on top. Always check whether a build contract is quoted including or excluding GST, as the difference is large.

New Build GST Calculator

This New Zealand calculator works out the GST included in a new build price and the GST-exclusive build cost. A new build sold by a GST-registered developer includes 15% GST in the price, unlike most existing homes, which are not subject to GST. You enter the price, choose whether it is GST inclusive or exclusive, and the tool shows the GST portion and the price both ways, useful for buyers, builders and developers.

Price

This price is

GST in the price (15%)

GST exclusive$0

GST inclusive$0

GST is 15%. The GST portion of an inclusive price is price x 3 / 23. New builds from a registered developer include GST; most existing homes sold privately do not. Always confirm whether a build contract is quoted including or excluding GST. Estimate only.

How it works

If the price you enter is GST inclusive, the calculator finds the GST as price times 3 divided by 23, and the exclusive price as the rest. If the price is GST exclusive, it adds 15% to get the inclusive price. This matters most for build contracts, where a figure quoted "plus GST" is 15% more than it first appears, and for buyers comparing a new build (GST included) with an existing home (no GST).

Worked example

On an $850,000 GST-inclusive new build, the GST portion is about $110,870, leaving a GST-exclusive figure of about $739,130. If a builder instead quoted $850,000 plus GST, the inclusive price would be $977,500.

Related calculators

GST Calculator: add or remove GST.
Build Cost per Square Metre Calculator: build cost.
Property New Build Calculator: new build numbers.
Property Legal Fees Calculator: legal costs.

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