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Sole Trader vs Company in NZ: Which Is Right for You?

Understanding the key differences between operating as a sole trader and forming a limited liability company in NZ, including the insurance implications.

Sarah Ngata · Insurance Specialist, Wellington
20 November 2025

One of the earliest decisions when starting a business in New Zealand is choosing your business structure. For most new self-employed people, the choice is between operating as a sole trader or forming a limited liability company. Both have advantages and disadvantages, and the right choice depends on your specific circumstances.

This article covers the key differences — including how each structure affects your insurance needs and personal liability.

The Sole Trader Structure

A sole trader is an individual running a business under their own name or a trading name. There is no legal separation between you and your business. Legally, you are the business.

Advantages: - Simplest to set up (no registration required) - Lowest administrative burden - Full control over business decisions - Simpler tax filing (IR3 individual tax return) - All profits are yours

Disadvantages: - Unlimited personal liability: If the business is sued or can't pay debts, you are personally responsible. Your personal assets — home, savings, car — can be used to satisfy business debts or legal judgements. - No separate legal identity - May be harder to raise capital or sell the business

The Limited Liability Company Structure

A company is a separate legal entity from its shareholders (owners). The company has its own rights and obligations — it can enter contracts, own property, sue and be sued.

Advantages: - Limited liability: Shareholders typically risk only their investment in the company. Personal assets are protected from business debts (with some exceptions). - Separate legal identity - Easier to raise capital (can issue shares) - Potentially more credible to larger clients - Can be sold more easily as a going concern

Disadvantages: - More expensive to set up and maintain (Companies Office registration, annual filing) - Greater administrative burden (minutes, resolutions, director duties) - Slightly more complex tax treatment - Profits cannot be withdrawn without formal dividend or salary processes - Directors can still be personally liable in some circumstances (reckless trading, breaches of director duties)

The Liability Question: Is a Company Really Safer?

Many people form companies specifically for the limited liability protection. But how real is that protection in practice?

Where limited liability helps: - Business debts (trade creditors, supplier disputes) - General business contracts where the company is a party - Negligence claims against the company (not a director personally)

Where limited liability may not help: - Personal guarantees: Many lenders and suppliers require directors of small companies to personally guarantee company obligations. This removes the limited liability benefit for those specific debts. - Director liability: Directors can be personally liable for insolvent trading, breaches of director duties, and certain other conduct. - Professional liability: A professional negligence claim against a sole trader IT consultant and against an IT consulting company with one director-shareholder may have similar practical consequences — in both cases, PI insurance is what actually protects the individual. - Tort claims: Courts have sometimes pierced the corporate veil to hold directors personally liable for torts (civil wrongs including negligence).

Insurance Implications: Sole Trader vs Company

The business structure affects your insurance in several ways:

Professional indemnity: - Both sole traders and companies need PI insurance if they provide professional services - If you operate through a company, the PI policy should be in the company's name (the entity doing the work) - Some professionals also hold personal PI in addition to company PI as an extra layer of protection

Public liability: - The structure changes the name on the policy but not the need - Companies need public liability; sole traders need public liability

Directors and officers (D&O) liability: - Only relevant to companies (and other organisations with directors/officers) - D&O insurance protects directors personally for claims arising from their management decisions - Not relevant to sole traders

Income protection: - Available to individuals regardless of business structure - As a company director-shareholder, your income is typically defined as salary drawn from the company - Important: Ensure your income protection definition aligns with how you're actually paid

ACC treatment: - Sole traders pay ACC levies on their business income - Company owner-directors pay ACC as employees of the company on their salary - The ACC treatment differs but the protection provided is similar

When to Consider Incorporating

Incorporating (forming a company) may make sense when: - Your revenue exceeds $150,000–$200,000 and tax advantages of company tax rates become relevant - You're taking on significant commercial contracts with substantial liability exposure - You want to separate multiple business activities into distinct entities - You plan to sell the business eventually - Your clients specifically require dealing with a company - You want to bring in business partners as shareholders

When sole trader is appropriate: - You're starting out and want to minimise overhead - Your revenue is below the threshold where company tax advantages apply - Your liability exposure is well-managed through insurance - You want maximum simplicity

The Practical Bottom Line

For most sole traders in NZ, adequate insurance provides more effective personal protection than a company structure — especially when the company structure still requires personal guarantees and director liability remains a risk. A well-insured sole trader with public liability, PI, and income protection is typically more financially secure than an uninsured company director.

Business structure and insurance aren't either/or — they're complementary risk management tools. An accountant can advise on the optimal structure for your tax position, and an insurance adviser can ensure your coverage is appropriate regardless of your structure.

SN
Sarah Ngata
Insurance Specialist, Wellington

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