How to Choose the Right Business Structure in NZ

One of the first (and most consequential) decisions any business owner makes is choosing a legal structure. It affects how much tax you pay, how exposed you are to personal liability, how you bring on investors or partners, and how easy it is to restructure later if your circumstances change. In New Zealand, most businesses operate as one of five structures: sole trader, partnership, company, look-through company (LTC), or trust. Each has distinct tax implications and trade-offs, and the right choice depends on your specific situation.

Sole Trader

A sole trader is the simplest business structure. You and the business are the same legal entity. All profit is taxed as personal income at your marginal rate, up to 39% for income above $180,000. There is no separate entity to register (beyond an IRD number), no annual Companies Office filing, and minimal compliance overhead.

The main advantage is simplicity. The main disadvantage is unlimited personal liability: if the business incurs debts or is sued, your personal assets are at risk. There is also no ability to split income, no access to the 28% company tax rate, and limited options for bringing on co-owners or investors.

• ●Best for: freelancers, side hustles, and very early-stage businesses with low risk and turnover under $60,000–$80,000
• ●Tax rate: personal marginal rate (10.5%–39%)
• ●Liability: unlimited personal liability
• ●Compliance: minimal. Just personal tax returns and GST if registered

Partnership

A partnership is similar to a sole trader but with two or more people. The partnership itself does not pay tax. Instead, each partner includes their share of partnership income in their personal tax return. A written partnership agreement is strongly recommended (though not legally required), covering profit-sharing, decision-making, and exit provisions.

Partnerships carry unlimited joint and several liability, meaning each partner can be held personally responsible for the full debts of the business, not just their share. This is a significant risk that many partners underestimate. Limited partnerships exist in New Zealand but are relatively uncommon and come with additional compliance requirements.

• ●Best for: professional services firms and joint ventures with trusted partners
• ●Tax rate: each partner taxed at their personal rate on their share of income
• ●Liability: unlimited joint and several liability
• ●Compliance: partnership IR7 return plus individual partner returns

Company (NZ Limited Company)

A company is a separate legal entity with its own IRD number, bank accounts, and tax obligations. Company profits are taxed at a flat 28%, lower than the top personal rate of 39%. The company pays you a salary (taxed as PAYE) and can declare dividends to shareholders. Limited liability means your personal assets are generally protected from business debts, though directors still have personal obligations under the Companies Act 1993.

Operating through a company creates the most flexibility for tax planning. You can optimise the mix of salary and dividends, retain profits in the company at 28%, and access fringe benefit arrangements. However, there is more compliance: annual financial statements, a Companies Office annual return, company tax returns, and potentially PAYE and FBT obligations.

“For most businesses turning over more than $100,000 in profit, operating as a company is more tax-efficient than a sole trader structure. The savings compound significantly as income grows.”

• ●Best for: businesses with consistent profits above $70,000–$100,000, or those wanting limited liability
• ●Tax rate: 28% company tax, plus personal tax on salary and dividends
• ●Liability: limited to company assets (with director duties exceptions)
• ●Compliance: annual accounts, company tax return, PAYE, Companies Office filing

Look-Through Company (LTC)

An LTC is a special type of company that is transparent for tax purposes: profits and losses flow through to the shareholders' personal tax returns, similar to a partnership. The company structure still provides limited liability, but for tax purposes it is as if you earned the income directly. LTCs are commonly used for rental property ownership because they allow losses (where available) to be offset against the owner's other personal income.

LTCs have strict eligibility criteria: a maximum of five look-through counted owners, all of whom must be New Zealand tax residents (or certain types of trusts). If you breach these requirements, the company loses LTC status, and the tax consequences of that transition can be significant. The interest limitation rules that took effect from October 2021 have also reduced the attractiveness of LTCs for residential rental property.

• ●Best for: property investors who want loss flow-through with limited liability, or small businesses with variable income
• ●Tax rate: profits taxed at owners' personal rates
• ●Liability: limited (same as a standard company)
• ●Compliance: same as a company plus LTC disclosure requirements

Trust

A trust is not a business structure in the same way as the others. It is a relationship where a trustee holds assets on behalf of beneficiaries. Trusts are commonly used for asset protection, estate planning, and income distribution. Trust income distributed to beneficiaries is taxed at the beneficiary's marginal rate; undistributed income (trustee income) is taxed at 39%.

The Trusts Act 2019 introduced significant new compliance requirements including mandatory record-keeping, disclosure obligations, and a requirement that trustees understand the terms of the trust deed. Running a trading business through a trust is possible but uncommon. It is more typical to use a trust as a shareholder in a company, combining the company's tax efficiency with the trust's asset protection.

• ●Best for: asset protection, estate planning, and holding shares in a trading company
• ●Tax rate: 39% on trustee income; beneficiary income at their personal rate
• ●Liability: limited to trust assets if structured correctly
• ●Compliance: annual trust tax return, financial statements, Trusts Act 2019 obligations

Common Mistakes We See

• ●Staying as a sole trader too long. Many business owners pay thousands more in tax than they need to because they never incorporated
• ●Choosing a company structure based on what a friend did, without considering your specific income, risk profile, and goals
• ●Setting up an LTC without understanding the ownership restrictions, losing LTC status years later with unexpected tax consequences
• ●Creating a trust for asset protection without understanding the Trusts Act 2019 compliance requirements, or without properly settling assets
• ●Not revisiting your structure as your business grows. What made sense at $50,000 in revenue rarely makes sense at $500,000

How to Decide

The right structure depends on several factors: your expected income, risk exposure, number of owners, plans for growth or investment, and personal circumstances like property ownership and family situation. There is no one-size-fits-all answer, and the cheapest structure to set up is often the most expensive to run over time.

We recommend getting professional advice before you register anything. Restructuring after the fact (converting a sole trader to a company, or transferring assets into a trust) triggers tax events, legal costs, and administrative hassle that could have been avoided with upfront planning.