New Zealand's Business Tax System Explained
New Zealand has a relatively simple and transparent tax system compared to many other countries. For business owners, the two most important taxes to understand are Goods and Services Tax (GST) and company income tax. Getting these right from the start will save you stress, penalties, and compliance headaches down the track.
Getting an IRD Number
Before your company can pay tax or register for GST, it needs an IRD number from Inland Revenue (IRD). This is a unique identifier for your business in the tax system. You can apply for a company IRD number online through the IRD website (ird.govt.nz) once your company has been registered with the Companies Office. Have your company number and director details ready.
Goods and Services Tax (GST)
GST is a consumption tax applied to most goods and services sold in New Zealand. The current rate is 15%. Here's what business owners need to know:
When Must You Register?
You must register for GST if your taxable turnover exceeds or is likely to exceed NZD $60,000 in any 12-month period. You can also voluntarily register if your turnover is below this threshold, which may be beneficial if you have significant business expenses and want to claim GST refunds.
How GST Works
- You charge GST on your sales (output tax) and collect it on behalf of IRD.
- You can claim back GST you've paid on business purchases (input tax).
- You file GST returns — either monthly, two-monthly, or six-monthly — and pay the net difference to IRD (or receive a refund if you've paid more GST than you've collected).
GST-Exempt Supplies
Some supplies are exempt from or zero-rated for GST, including financial services, residential rental income, and exported goods and services. It's worth confirming the GST treatment of your specific products or services.
Company Income Tax
New Zealand companies pay income tax on their net profit at a flat rate of 28%. This is the company tax rate; it does not apply to sole traders or partnerships, who are taxed at individual income tax rates.
Provisional Tax
If your company expects to pay more than NZD $5,000 in income tax for the year, you'll need to pay provisional tax — essentially tax paid in instalments throughout the year rather than in a lump sum at the end. The standard method uses your prior year's tax as a base.
Allowable Deductions
Businesses can deduct expenses that are incurred in the course of earning income. Common deductions include:
- Salaries and wages
- Rent and utilities for business premises
- Business travel and vehicle use (to the extent used for business)
- Marketing and advertising costs
- Depreciation on business assets
- Professional fees (accounting, legal)
PAYE and Employer Obligations
If you employ staff, you must deduct Pay As You Earn (PAYE) tax from their wages and pay it to IRD on their behalf. You'll also need to contribute to KiwiSaver (New Zealand's workplace retirement savings scheme) — at minimum a 3% employer contribution for eligible employees.
Key Tax Dates to Remember
| Obligation | Frequency |
|---|---|
| GST Return & Payment | Monthly / Two-Monthly / Six-Monthly |
| Provisional Tax Instalments | 3 times per year (standard method) |
| Terminal Tax (final year balance) | Annually (due ~7 February or April) |
| PAYE | Twice monthly or monthly |
Getting Help
New Zealand's tax system is well-supported by online tools. The IRD website offers calculators, guides, and MyIR — an online portal where you can manage all your tax obligations. Many small business owners also work with a chartered accountant, particularly for year-end returns and tax planning.