NZ GST Calculator 2026: Add or Remove 15% GST

How do you add or subtract GST in NZ?

This free online GST calculator for New Zealand uses the official 15% standard rate and the mathematical guidelines published by the Inland Revenue Department (IRD) in guide IR375. Use it to check retail invoices, create client quotations, or prepare your two-monthly or six-monthly GST returns in myIR.

GST calculator NZ formula: how to calculate 15% GST

Select the formula that applies to the number you have. In accordance with IRD rules, all amounts are rounded to the nearest cent.

Why not just subtract 15% from a GST-inclusive price?

A common mistake is taking 15% off an inclusive price. The tax component inside an inclusive figure is 3/23 (approx 13.043%), not 15%. Subtracting 15% from $115 gives $97.75, which leaves you $2.25 short. The correct net price is always $100.00.

How do you calculate a GST exclusive price in NZ?

Divide the GST-inclusive price by 1.15. For instance, an invoice totaling $230 divided by 1.15 gives a net figure of $200 before GST, meaning the GST charged is $30. Simply type your invoice total into the GST Inclusive Price field above and click Get GST.

How do you calculate GST from a total amount in NZ?

1. Take your total figure that already includes GST (e.g. $1,150).
2. Multiply it by 3 (gives $3,450).
3. Divide by 23 (gives $150). That $150 is the exact GST tax amount.

Subtracting $150 from the $1,150 total leaves your GST-exclusive price of $1,000.

What is $2,000 plus GST in NZ?

$2,000 plus GST is $2,300.00. The GST added is $300 ($2,000 × 0.15). If an invoice of $2,000 already includes GST, the GST portion is $260.87 ($2,000 × 3 ÷ 23) and the net price before tax is $1,739.13.

What is GST on common amounts in New Zealand?

Here is a quick-reference table for common business and consumer amounts with 15% GST:

Is there an NZ GST calculator app?

You don't need to download a heavy app from the app store. This page is built as a lightweight Progressive Web Tool that works seamlessly on iOS and Android. On an iPhone, open Safari, tap Share, and choose Add to Home Screen. On Android, open Chrome, tap the three dots, and select Install App or Add to Home Screen.

Is this an IRD GST calculator?

This is an independent tool published by WEBSOL Digital Solutions and is not operated by Inland Revenue (IRD). However, it directly implements the exact mathematical algorithms specified in IRD publication IR375 and on the official Inland Revenue calculating GST page.

How do you calculate GST on imports into NZ?

GST on imported goods is 15% of the customs value plus freight, insurance, and applicable customs duty: GST = 0.15 × (Customs Value + Duty + Freight + Insurance). For items valued over NZ$1,000, New Zealand Customs collects the GST and biosecurity levy at the border.

Is GST always 15% in NZ?

While 15% is the standard rate applying to the vast majority of goods and services, some supplies are zero-rated (0%) (such as exported services and international travel) or exempt (such as financial transactions and residential rent). For non-standard transactions, refer directly to IRD guidelines.

How do I calculate my GST to pay on my return?

For GST-registered businesses, the net amount payable or refundable is: GST collected on sales − GST paid on business expenses. If the GST you paid exceeds what you collected, you are entitled to a refund from IRD.