New Zealand has a relatively straightforward business tax system compared to many countries, but the choices you make about business structure, how you pay yourself, and how you manage GST and provisional tax have significant financial consequences. This hub covers the tax implications of every major business decision in New Zealand.
Choosing a Business Structure
The most consequential tax decision a NZ business owner makes is their legal structure. The main options are:
Sole trader: The simplest structure. All business income is personal income, taxed at your marginal rate (up to 39%). No company administration or filing required, but also no liability separation. Once income moves above $53,500, where the 30% personal rate starts (and 33% above $78,100), a company taxed at 28% can become more tax-efficient for profits kept in the business.
Company: A NZ registered company pays the flat company tax rate of 28% on its taxable income. If you’re a shareholder-employee, you can choose how much to pay yourself as a salary (taxed at personal rates via PAYE) and how much to retain in the company or distribute as dividends (taxed at 28% with imputation credits attached). For most businesses earning over $70,000–$80,000 net profit, incorporation begins to offer meaningful tax savings.
Look-Through Company (LTC): An LTC allows company losses and income to flow through to shareholders and be taxed at personal rates — useful for businesses with early-stage losses, or property investors who want to offset losses against other income. LTCs have specific rules and restrictions.
Trust: Family trusts can be used to distribute income to lower-earning beneficiaries, though the 2024 increase in the trustee tax rate to 39% significantly reduced this advantage for retained income.
The 28% Company Tax Rate
New Zealand’s company tax rate of 28% is below the personal income tax rates on income over $53,500 (30%, 33% and 39%). This means that for business owners whose net profit reaches those brackets, retaining income in a company and reinvesting it — rather than drawing it all as salary — can defer tax and improve cash flow.
However, retained company income is eventually taxed again when distributed as dividends — unless imputation credits (representing tax already paid at the company level) are attached. Understanding imputation credits is essential for shareholder-directors.
Provisional Tax
Companies and self-employed individuals with tax bills over $5,000 must pay provisional tax — advance payments of estimated income tax made three times per year. Getting this wrong results in either underpayment penalties or overpayment (effectively lending money to IRD interest-free). Using the standard uplift method (105% of last year’s residual income tax) is the safest option for most small businesses.
Company Tax Guides
- NZ Company Tax Rate Explained — the 28% rate, how it works, IR4 filing
- How to Pay Yourself a Shareholder Salary — salary vs dividend, PAYE obligations, optimal structure
- Sole Trader vs Company NZ — Tax Comparison — which structure saves more tax
- How to File a Company Tax Return (IR4) — step-by-step IR4 guide
- Look-Through Companies (LTC) Explained — LTC rules, when they make sense
- Imputation Credits NZ — How They Work — company tax and dividend imputation end to end
- Partnership Tax NZ — IR7 returns, flow-through taxation, provisional tax
- Entertainment Expenses NZ — 50% Rule — which costs are 50% vs 100% deductible
- R&D Tax Credit NZ — 15% credit on eligible R&D spend
- Selling a Business NZ — Tax Guide — asset sale vs share sale, depreciation recovery, goodwill, GST
- Depreciation Rates NZ — IRD rates for common assets