Company (ltd) vs Partnership vs Sole Trader vs Look‑through Company, Which Is Best for My NZ Small Business?

Company ltd vs partnership vs sole trader is one of the first and most consequential decisions a New Zealand business owner makes, and getting it right shapes liability, tax, governance and growth for years to come. Whether you are a solo freelancer, two people going into business together, or a family enterprise weighing up a look‑through company (LTC), the structure you choose determines who is legally responsible when things go wrong and how your profits are taxed. This guide compares the four structures most small New Zealand businesses consider, sole trader, partnership, limited company and look‑through company, across liability, tax, compliance, capital‑raising and exit.

It closes with a practical decision checklist and the questions you should take to your accountant and lawyer before you commit.

This article offers general, NZ‑focused guidance on business structures. It is not a substitute for tailored advice. Speak to a business lawyer and an accountant before choosing or changing your structure.

Quick summary: which structure is right for which business?

Before diving into detail, here is the short version of how company ltd vs partnership vs sole trader usually plays out for small New Zealand businesses. The right answer depends on your risk appetite, tax position, growth plans and how much administration you are prepared to carry.

• Sole trader. Best for solo operators and low‑risk ventures who want the simplest setup. You and the business are the same legal person, so you carry unlimited personal liability.
• Partnership. Suits two or more people sharing work and profits in a lower‑risk activity, provided they document the arrangement in a partnership deed. Partners are generally jointly and severally liable.
• Limited company (Ltd). The default for businesses expecting growth, outside investment, or meaningful trading risk. It provides a separate legal entity and limited liability, subject to director duties and personal guarantees.
• Look‑through company (LTC). A closely held company that elects to have profits and losses flow through to its owners for tax purposes. Attractive for owner‑operated and family businesses that want company status with pass‑through taxation.

Quick decision checklist

• How much personal risk are you exposed to if the business fails?
• Do you plan to bring in investors or raise equity capital?
• Will you share ownership, and if so, how will decisions be made?
• Do you want profits and losses taxed in your own hands, or retained in a company?
• How much compliance and reporting are you willing to manage each year?

What each structure is: legal definition and first‑step setup

Each structure has a distinct legal foundation in New Zealand law, with its own registration path and cost. Understanding the legal starting point makes the company ltd vs partnership vs sole trader comparison far clearer.

Sole trader, what it means in NZ

A sole trader is an individual carrying on business in their own name. There is no separate legal entity, you and the business are one and the same. You are taxed as an individual at personal rates, and you declare business income in your personal tax return. There is no formal registration to become a sole trader, though you will need an IRD number and should register for GST if your turnover reaches the GST registration threshold set by Inland Revenue. The business.govt.nz guidance on choosing a structure is a useful starting point for first‑time operators.

Partnership, what it means and Partnership Act basics

A partnership is a relationship between two or more persons carrying on business in common with a view to profit. Like a sole trader, a general partnership is not a separate legal entity; the partners are the business. The default rules governing partner relationships, profit sharing and liability are set out in the Partnership Law Act 2019, which replaced and restated the former Partnership Act 1908. Those default rules rarely match what partners actually want, which is why a written partnership deed is strongly recommended. A deed records capital contributions, profit splits, decision‑making, dispute resolution and what happens when a partner leaves or dies, all matters the Act would otherwise decide for you.

Limited company (Ltd), what it means

A limited company is a separate legal person, distinct from its shareholders and directors. This separate legal personality is the cornerstone of the Companies Act 1993: the company can own property, enter contracts, sue and be sued in its own name. You register a company through the Companies Office, reserve a name, appoint at least one director who meets the residency requirements in the Act, allocate shares, and adopt a constitution or rely on the default provisions of the Act. Companies must file annual returns and keep statutory records. Registration costs are modest, but ongoing compliance is higher than for a sole trader or partnership.

Look‑through company (LTC), quick introduction

A look‑through company is a standard limited company that has made a valid election to be taxed on a flow‑through basis under the look‑through company rules in the Income Tax Act 2007. For legal purposes it remains an ordinary company, separate legal personality, limited liability and all, but for tax purposes its income and deductions pass through to the owners in proportion to their shareholding. An LTC must be a closely held company that meets eligibility conditions, including limits on the number and type of owners. Inland Revenue sets out the practical eligibility and tax rules on its look‑through companies page.

The LTC sits at the heart of the company ltd vs partnership vs sole trader question for many owner‑operated businesses, because it blends the legal protection of a company with pass‑through taxation.

Liability and personal risk: who is legally responsible?

Liability is usually the single biggest driver in the company ltd vs partnership vs sole trader decision. The structure determines whether your personal assets are on the line when the business cannot pay its debts.

Sole trader, unlimited personal liability

Because a sole trader and the business are the same legal person, there is no separation between business and personal assets. If the business incurs debts it cannot meet, creditors can pursue your personal property, including your home and savings. This unlimited exposure is the central disadvantage of trading as a sole trader, particularly in activities with real financial or physical risk.

Partnership, joint and several liability

Under the Partnership Law Act 2019, partners in a general partnership are jointly and severally liable for the debts and obligations of the firm incurred while they are a partner. In practical terms, a creditor can recover the full amount of a partnership debt from any one partner, who must then seek contribution from the others. This means you can be personally liable not only for your own decisions but for those of your partners acting in the ordinary course of business, one reason a well‑drafted partnership deed and careful partner selection matter so much. For businesses asking which structure carries the least liability, a general partnership is at the higher‑risk end alongside the sole trader.

Company, limited liability but director duties and personal exposure

A limited company offers the strongest liability protection of the common structures. Shareholders’ liability is generally limited to any amount unpaid on their shares, and the company’s debts are its own. However, limited liability is not absolute. Directors owe duties under the Companies Act 1993, including the duty to act in good faith and in the company’s best interests, and duties relating to reckless trading and incurring obligations the company cannot meet. Breaching those duties can expose a director personally. In addition, lenders, landlords and major suppliers frequently require directors to sign personal guarantees, which strip away limited liability for the specific debt guaranteed.

Security interests behind those arrangements are commonly registered on the Personal Property Securities Register (PPSR), so owners should understand what they are signing.

Look‑through company, liability versus tax treatment

An LTC is legally a company, so owners retain limited liability for company debts in the same way as an ordinary Ltd, the look‑through election affects tax, not legal liability. Personal guarantees and director duties still apply.

Tax implications and profit distribution

Tax is the other half of the company ltd vs partnership vs sole trader equation. How profits are taxed, when they are taxed, and how flexibly they can be distributed differ markedly between structures. The figures below are illustrative; always confirm current rates with Inland Revenue before relying on them.

Sole trader tax treatment

A sole trader pays income tax on business profit at personal marginal rates, declared through an individual tax return. There is no separation between business and personal income, so all profit is taxed in the year it is earned. Sole traders must also manage provisional tax once income reaches the relevant level, pay ACC levies, and register for and account for GST once turnover crosses the registration threshold set by Inland Revenue.

Partnership tax treatment

A partnership itself does not pay income tax. Instead, profit is allocated to the partners according to the partnership agreement, and each partner is taxed individually at their own marginal rate on their share. The partnership files its own return recording total income and each partner’s share, but the tax liability sits with the individuals. This flow‑through treatment can be efficient where partners have differing personal tax positions, but it also means each partner carries their own provisional tax and ACC obligations.

Company tax and dividends

A company is a separate taxpayer and pays income tax on its profit at the company tax rate set by legislation. Profits retained in the company are taxed only at that corporate rate until distributed. When the company pays a dividend to shareholders, the dividend is taxable in the shareholder’s hands, but New Zealand’s imputation credit system allows the company to attach credits for tax it has already paid, reducing or avoiding double taxation on the same profit. This structure gives real flexibility: owners can retain earnings in the company to reinvest at the company rate, or distribute dividends when it suits their personal tax position. The trade‑off is additional compliance and the need to manage imputation credit accounts correctly.

Look‑through company tax rules, flow‑through and when it helps

An LTC combines company status with partnership‑style taxation. Under the look‑through company rules in the Income Tax Act 2007, the company’s income, expenses, tax credits and losses flow through to owners in proportion to their shareholding, and owners are taxed at their personal rates (subject to the loss limitation and other rules that apply to LTCs). Inland Revenue’s look‑through companies guidance sets out the eligibility conditions and how the rules apply in practice.

Consider a simple illustration. A company earns $100,000 of profit owned equally by two shareholders. As an ordinary company, that profit is first taxed at the company rate, and further tax may arise when dividends are paid (with imputation credits attached). As an LTC, each owner is instead allocated $50,000 of income and taxed on it at their own marginal rate. Where owners sit on lower personal rates, or where the business is making early‑stage losses that owners want to offset against other income (within the LTC loss‑limitation rules), the LTC flow‑through can be genuinely advantageous. Where owners are on the top personal rate and want to retain and reinvest profit, an ordinary company may be more efficient.

This is precisely the kind of modelling to run with an accountant, because the best answer depends on each owner’s circumstances.

Governance, control and compliance burdens

Compliance cost and administrative effort scale with the sophistication of the structure. Weighing the company ltd vs partnership vs sole trader choice means being honest about how much governance you are prepared to carry year after year.

Reporting for companies

Companies carry the heaviest compliance load. Under the Companies Act 1993, a company must maintain a share register and statutory records, keep accounting records, file an annual return with the Companies Office confirming its details, and comply with directors’ duties. Many companies document key decisions through written resolutions or minutes and prepare financial statements. The administrative overhead is manageable but real, and directors who neglect it can face penalties and personal consequences.

Partnership governance, deed and decision‑making

A partnership’s governance rests on the agreement between the partners. Without a deed, the Partnership Law Act 2019 default rules decide matters such as equal profit sharing and consent requirements for certain decisions, rarely the arrangement partners actually intend. A deed should set out capital, profit allocation, who can bind the firm, how disputes are resolved and how a partner can exit. There is no public filing of the deed, but its absence is a frequent source of costly disputes.

Sole trader compliance, simpler but less separation

A sole trader has the lightest compliance burden. There is no separate entity to maintain, no annual return to the Companies Office, and no separate company tax return. The flip side is the absence of legal separation: personal and business affairs are intertwined, which simplifies administration but removes the protection a company offers.

LTC compliance, additional reporting and tax returns

An LTC carries the company’s ordinary compliance obligations plus the additional tax reporting required to allocate income and losses to owners under the look‑through rules.

Raising capital and growth considerations

If growth or outside investment is on your horizon, capital‑raising capability should weigh heavily in the company ltd vs partnership vs sole trader decision, because structures differ sharply in how easily they can take on investors.

Ease of raising equity

A limited company is by far the most capital‑friendly structure. Shares can be issued to investors, ownership is divisible and transferable, and institutional investors and venture capital almost always require a company. A partnership can admit new partners and share capital contributions, but this is clumsier and exposes incoming partners to joint and several liability. A sole trader has no mechanism to issue equity at all, raising investment effectively means restructuring, usually into a company. The ranking for equity‑raising is clear: company, then partnership, then sole trader.

Use of personal guarantees and PPSR

Even in a company, banks and significant creditors frequently require directors’ personal guarantees, and lenders register security interests over business assets on the PPSR. Owners should search the PPSR, understand what security they are granting, and take advice before signing guarantees that reinstate personal exposure.

When a look‑through company vs partnership vs sole structure is appropriate

The LTC occupies a useful middle ground, but it is not right for every business. Knowing when to reach for a look‑through company, and when a company ltd vs partnership vs sole structure serves you better, avoids expensive restructuring later.

An LTC is typically attractive for closely held, owner‑operated or family businesses that want the legal protection of a company together with pass‑through taxation. It can be useful where the business is expected to generate losses in its early years that owners may offset against other personal income (subject to the LTC loss‑limitation rules), or where owners are on lower marginal rates than the company rate. It is less useful where profits will be retained and reinvested rather than distributed, or where the ownership group is large or includes ineligible owners.

When NOT to use an LTC

Avoid an LTC where you plan to retain earnings for reinvestment, where ownership does not meet the closely held eligibility rules, or where bringing in institutional investors is likely.

Alternatives: trust and limited partnership

Other vehicles may suit specific goals. A trust can assist with asset protection and succession planning, particularly for family wealth or property‑holding, though it carries its own compliance and governance requirements under the Trusts Act 2019. A limited partnership, a distinct statutory vehicle governed by the Limited Partnerships Act 2008, is commonly used for investment funds and ventures where some partners want limited liability while others manage the business. These alternatives are best assessed with professional advice against your specific objectives.

Practical examples and short case studies

Hypotheticals make the company ltd vs partnership vs sole trader trade‑offs concrete. The following illustrations are simplified; the recommended structure for any real business depends on its full circumstances.

The freelance consultant. A solo consultant with low overheads, no staff and minimal trading risk earns a modest profit. A sole trader structure is simple and cheap, with income taxed at personal rates. If client contracts grow in value, or the consultant takes on subcontractors and liability, incorporating as a company to limit exposure becomes worth discussing. Ask your accountant whether GST registration is required and whether provisional tax applies; ask your lawyer about contract liability and professional indemnity.

Two partners with uneven capital. Two people start a trades business, but one contributes most of the capital and the other most of the labour. A general partnership exposes both to joint and several liability, and the default Act rules would split profits equally regardless of contribution. A carefully drafted partnership deed, or incorporation as a company with shareholding reflecting the deal, better matches their intentions. Ask your lawyer to document the ownership split and exit terms; ask your accountant how profit allocation affects each person’s tax.

The small café planning to grow. A café owner wants to open a second site and may seek an investor. A limited company allows shares to be issued to an investor and limits the owners’ liability on supplier and lease obligations, subject to any guarantees. Ask your lawyer about company constitution, shareholder agreement and guarantees; ask your accountant about dividend and imputation planning.

The family farm considering an LTC. A family farming operation wants company protection but expects early losses and wants owners to use those losses. An LTC may let losses flow through to the owners’ personal returns, subject to the eligibility and loss‑limitation rules. Ask your accountant to model LTC flow‑through against ordinary company treatment; ask your lawyer about succession and whether a trust should hold shares.

Comparison table, at a glance

The table below summarises the company ltd vs partnership vs sole trader comparison alongside the look‑through company, across the axes that matter most. Use it as a starting map, not a final answer.

Image alt: Comparison table of NZ business structures, company ltd vs partnership vs sole trader and look‑through company.

The key trade‑offs: simplicity and low cost come at the price of unlimited liability, while limited liability and capital‑raising capacity come with higher compliance. The LTC trades a slice of that company flexibility for pass‑through tax that suits closely held owners.

Decision checklist: what to discuss with your accountant and lawyer

Take concrete questions to your first professional meeting so you leave with a recommendation, not more uncertainty. Work through the following with your adviser:

• Risk appetite. How exposed are your personal assets if the business fails or is sued?
• Profit distribution. Do you need flexible dividends, or do you want profit taxed in your own hands now?
• Growth and capital. Will you seek investors, bank lending or equity partners?
• Ownership and control. Who owns what share, and who makes which decisions?
• Director roles and duties. Who will be a director, and do they understand their Companies Act obligations?
• Creditors and guarantees. Which lenders or landlords will require personal guarantees, and what will be registered on the PPSR?
• Tax thresholds. GST registration, provisional tax and ACC levy implications for each structure.

Next steps and how Global Law Experts can help

Choosing between a company ltd vs partnership vs sole trader or an LTC is a decision best made with both a business lawyer and an accountant, because the legal and tax consequences are intertwined. A short advisory conversation before you form or change your structure can prevent expensive restructuring, unexpected tax events and personal liability later. Explore the Business practice area, New Zealand (GLE) and use the GLE directory to find a business lawyer in New Zealand to discuss your situation and next steps.

Sources

1. New Zealand Legislation, Companies Act 1993
2. New Zealand Legislation, Income Tax Act 2007
3. New Zealand Legislation, Partnership Law Act 2019
4. New Zealand Legislation, Limited Partnerships Act 2008
5. Inland Revenue (IRD), Look‑through companies
6. Companies Office (New Zealand)
7. Business.govt.nz (MBIE), Choosing the right business structure
8. Personal Property Securities Register (PPSR), New Zealand
9. New Zealand Law Society