🇳🇿 New Zealand GST

New Zealand GST Calculator

Add or remove 15% GST instantly using the official IRD 3/23 method. Get the exact GST-exclusive price, GST amount, and GST-inclusive price.

Calculation Type Choose whether your amount already includes GST

GST-Exclusive Amount Enter the price before GST is added

GST Rate Standard NZ rate is 15% (in effect since 1 Oct 2010)

Registration Threshold Reference information only

Compulsory GST Registration NZD 60,000

Required once taxable supplies exceed $60,000 in any rolling 12-month period (s.51, GST Act 1985)

ℹ️ This calculator uses the official IRD 3/23 fraction to extract GST from an inclusive amount, avoiding the rounding errors caused by simply subtracting 15%.

GST-Inclusive Price

💵 GST-Exclusive Price --

🧾 GST Amount (15%) --

💰 GST-Inclusive Price --

📊 Detailed GST Breakdown

GST-Exclusive Price

GST Rate Applied

GST Amount

GST-Inclusive Price

GST Component (3/23 method)

📈 Calculation Method Used

Formula

IRD Reference

GST Act 1985

How New Zealand GST is Calculated

New Zealand's Goods and Services Tax (GST) is a flat consumption tax of 15%, applied to nearly all goods and services sold in NZ. Unlike Australia, New Zealand does not exempt basic food or most other everyday purchases from GST. This calculator lets you add GST to a net price or remove GST from a GST-inclusive price using the official Inland Revenue (IRD) method.

🧮 GST Rate History

Date	GST Rate
1 October 1986	10% (GST introduced)
1 July 1989	12.5%
1 October 2010 – present	15% (current rate)

📝 Key Formulas

Adding GST to a net price: Net Price × 1.15 = GST-Inclusive Price. For example, $500 × 1.15 = $575, where $75 is the GST component.

Removing GST from an inclusive price: GST-Inclusive Price ÷ 1.15 = GST-Exclusive Price. For example, $575 ÷ 1.15 = $500.

Finding the GST portion directly (IRD method): GST-Inclusive Price × 3 ÷ 23 = GST Amount. Since 15/115 simplifies to 3/23, this gives the exact GST content of an inclusive price without rounding drift. For example, $575 × 3 ÷ 23 = $75.

Common mistake: Taking 15% directly off a GST-inclusive amount overstates the GST. For a $115 inclusive price, 15% of $115 is $17.25 — but the correct GST is only $15 (found via $115 ÷ 1.15, or $115 × 3 ÷ 23).

💡 Example Calculation

Scenario: A business quotes a service at $500 excluding GST.

1. GST-Exclusive Price: $500
2. GST Amount: $500 × 15% = $75
3. GST-Inclusive Price: $500 + $75 = $575

Working backwards: A customer receives an invoice for $575 including GST.
1. GST-Inclusive Price: $575
2. GST Amount (3/23 method): $575 × 3 ÷ 23 = $75
3. GST-Exclusive Price: $575 − $75 = $500

Note: Figures are rounded to the nearest cent, per IRD guidelines.

⚠️ Important Notes

- This calculator provides estimates only based on the current 15% GST rate.
- Registration is compulsory once taxable supplies exceed $60,000 in any rolling 12-month period.
- Some supplies are zero-rated (e.g. exports) or exempt (e.g. residential rent, most financial services).
- Long-stay commercial accommodation (over 4 consecutive weeks) may be charged GST on only 60% of value under section 10(6) of the GST Act.
- For official guidance, use the Inland Revenue GST resources.
- GST rates and thresholds may change; always verify with IRD before filing a return.

Frequently Asked Questions

What is the GST rate in New Zealand? +

The standard GST rate in New Zealand is 15%. It has been 15% since 1 October 2010, when it was raised from 12.5%. GST was originally introduced in 1986 at 10%.

How do I add GST to a price? +

Multiply the GST-exclusive price by 1.15. For example, $500 × 1.15 = $575, where $75 is the GST component.

How do I remove GST from a price? +

Divide the GST-inclusive price by 1.15, or use the IRD-prescribed 3/23 fraction to find the GST portion directly. For example, $575 ÷ 1.15 = $500, and $575 × 3 ÷ 23 = $75 GST.

Why does the 3/23 method give a different answer than just taking 15% off? +

Taking 15% directly off a GST-inclusive amount overstates the GST, since the 15% rate applies to the original exclusive price, not the inclusive total. Because 15/115 simplifies to 3/23, multiplying the inclusive amount by 3/23 gives the exact GST content.

When do I need to register for GST in New Zealand? +

You must register when your taxable supplies exceed $60,000 in any rolling 12-month period, or when you reasonably expect to exceed $60,000 in the next 12 months, per section 51 of the GST Act 1985.

Is food GST-free in New Zealand? +

No. Unlike Australia, New Zealand does not exempt basic food from GST. Nearly all goods and services, including groceries, are charged the full 15% GST, with only a small number of zero-rated or exempt supplies such as exports and residential rent.

⚠️ Disclaimer: This calculator provides estimates for informational purposes only, based on the current 15% New Zealand GST rate. It does not constitute tax or financial advice. For official GST calculations and returns, consult Inland Revenue (IRD) or a qualified tax professional.