Introduction to company law
Emma Roberts • 13 February 2022

Part 1: Choosing the right business structure


If you are thinking about starting a new business, one important consideration will be how that business is to be structured. This decision will depend on a number of considerations, including:


  • The amount of control and responsibility you wish to have over the business;
  • The amount of risk involved with the venture, and therefore how important the extent your personal liability may be;
  • Tax considerations and implications;
  • The ability to grow the business; and
  • Cost and ease of establishment and compliance of the business.


Generally you will need to choose a business structure that will give you the greatest security, flexibility and profit while minimising its tax costs.


The three main business structures used in New Zealand are:


  1. Sole trader;
  2. Partnership; and
  3. Companies.


Sole Trader


A sole trader is an individual who is in business either in his or her own name or under a business name. If you are a sole trader you and your business are considered to be the same legal entity. All income from the business is included in your personal income, and taxed at your individual tax rate.


The advantages of operating as a sole trader are:


  •  No registration is required, which can mean lower administration costs.
  • You have entire control the business.
  • The profits go directly to you.
  • Any tax losses made by the business can be carried forward indefinitely and offset against future income.


The disadvantages of operating as a sole trader are:


  •  You will have unlimited personal liability for all of the debts of the business, so your personal assets will be at risk.
  • It is difficult to grow the business, for example through outside investment.
  • It can be difficult to sell the business, and there may be tax liability on the sale.


A sole trader may be the appropriate business structure for a small first off business as it is relatively straight forward and low cost. But if the business is looking to grow, or you want to protect your personal assets, one of the other structures discussed below should be considered.


Partnership


A partnership is a group of people or entities operating in business together. As with a sole trader, no registration is required, and it is not a separate legal entity. Generally the partners formalise their arrangement through a partnership agreement, although this is not legally required.


All the partners are bound by any act carried out by one of the partners acting in the ordinary course of business. The structure is therefore suited to when there is a small number of partners who know and trust each other. The profit of the business is shared out to the partners and each partner taxed on his or her individual income.


If one of the partners leaves the partnership, the partnership is dissolved and the remaining partners will need to enter into a new partnership.


The advantages of operating through a partnership are:


  •  The responsibility, costs and decision making for business are shared between the partners.
  • Each partner may bring different strengths and skills to the business.
  • If the partnership makes a loss it can be offset against the partners’ other income.

The disadvantages of operating through a partnership are:

  • Each partner has unlimited liability, and so their personal assets will be at risk (although it is possible for some partners to achieve limited liability through the use of a limited partnership).
  • Each partner has joint and several liability – so one partner could end up paying not only their share of the business’s debts, but their partners’, if the other partners were unable to pay their share.
  • The partners may disagree on certain decisions which could lead to conflict.


Companies


A company is an incorporated entity that has been registered with the New Zealand Companies Office. Unlike a sole trader or a partnership, a company is viewed as a separate legal entity to its shareholders. It owns all the assets and liabilities, whereas a sole trader would own them directly.


A Company has limited liability and so is liable for any debts it owes, rather than the shareholders directly. If the company fails, then the shareholders only lose the value of their shares.


However, if you’re involved in the running of the business as a director, you can be held liable for debts if your conduct is deemed to have been reckless, fraudulent or not in the company’s best interests. Lenders will also often only lend you capital once you’ve signed a personal guarantee over-riding your limited liability status.


This limited liability protection and the transparency of the company registry system (which allows anyone to see who’s involved with a company as a shareholder or director) can give greater confidence in this type of business structure compared with others.


Companies are taxed at the company tax rate (currently 28%) while the profits received from companies by shareholders (usually as a dividend) are taxed as part of that shareholder’s individual income. This means tax will ultimately be paid on company profits at the shareholders’ tax rates, even though the company rate is 28%.


The advantages of a company are:


  • Easier to attract funding and investment.
  • More credibility in the marketplace.
  • Easier to sell the business because it’s a separate entity.
  • The business can grow and last indefinitely because it isn’t tied to one person.
  • Shareholders’ liability is usually limited to their share of ownership.
  • Tax rate is lower than the top personal rate and the trust rate.

The disadvantages of a company are:

  • Higher levels of regulation compared with sole trader and partnership structures.
  • Can require larger amounts of investment.
  • Directors need to carefully understand their responsibilities.
  • If losses are made, they are retained by the company so they can’t ordinarily be offset against the shareholders’ other income for tax purposes.


Summary


There is a lot to consider when you are venturing into the commercial world, and taking some time at the very start of the process to ensure your business is structured in a way that is most adventurous to your individual circumstances can save later issues arising. We would be happy to discuss with you the various options outlined above in greater detail.

Our next article will look at how to start a company.

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23 October 2025
Choosing the right legal structure for your business isn’t just a box to tick, it’s a strategic decision that can shape your growth, manage your risk, and support long-term succession. Whether you're just starting out or reassessing your current setup, understanding the key differences between sole traders, partnerships, companies, and trusts can help you make informed decisions that align with your goals. Sole Traders: simple, but limited Operating as a sole trader is the simplest business structure. It’s easy to set up, with minimal compliance requirements, and gives the owner full control over decision-making. However, this simplicity comes with limitations. Sole traders are personally liable for all business debts and obligations, which can expose personal assets to risk. Growth can also be constrained, as the structure doesn’t easily accommodate investment or succession planning. For small scale operations or early stage ventures, sole trading may be a practical starting point, but it’s important to reassess as the business evolves. Partnerships: shared control, shared risk Partnerships involve two or more people working together in business. They offer flexibility and shared responsibility and can be a good fit for professional practices or family-run enterprises. However, like sole traders, partners are personally liable for business debts, unless the partnership is structured as a limited partnership. A limited partnership is a business structure where general partners manage the business and are fully liable, while limited partners invest but have liability only up to their contribution. Clear governance is essential. A well-drafted partnership agreement should outline roles, decision-making processes, profit sharing, dispute resolution, and exit strategies. Without this, misunderstandings can quickly escalate and impact the business. Companies: structure for scale A company is a separate legal entity, which means it can own assets, enter contracts, and incur liabilities independently of its shareholders. This structure offers limited liability, making it a popular choice for businesses looking to grow, attract investment, or manage risk. Companies are subject to governance obligations under the Companies Act 1993, including maintaining accurate records, filing annual returns, and ensuring directors act in good faith and in the best interests of the company. Shareholder agreements and constitution documents play a key role in setting expectations and protecting interests. For many businesses, incorporating as a company provides the structure and credibility needed to enable growth while also supporting succession planning through share transfers or director appointments. Trusts: protecting assets and planning ahead Trusts are often used to hold business assets, particularly in family-owned enterprises. A trust separates legal ownership from beneficial ownership, which can help protect assets from business risk and support long-term succession. Trusts require careful governance. Trustees must act in accordance with the trust deed and in the best interests of beneficiaries. Regular reviews, clear documentation, and professional advice are essential to ensure the trust remains fit for purpose and compliant with legal obligations. While not suitable for every business, trusts can be a powerful tool for asset protection, estate planning, and intergenerational succession, especially when used alongside other structures. Structuring for success The right structure depends on your business goals, risk profile, and future plans. It’s not just about compliance, it’s about clarity, control, and confidence. Smart structuring can: Limit personal liability; support investment and growth; clarify governance and decision-making; enable succession and continuity; and protect assets and manage tax obligations.  At Willis Legal, we work closely with business owners to ensure their structure supports both day-to-day operations and long-term strategy. Whether you're starting fresh, expanding, or planning for the next generation, we’re here to help you get it right.
19 October 2025
We’re pleased to shine a light on Emma Roberts, a Partner in our Commercial team. Emma brings a wealth of experience in business and commercial law, with particular expertise in the sale and purchase of businesses, shareholder arrangements, commercial financing, and asset protection. Emma has advised on a wide range of transactions, including the sale of a $34 million company and a $18 million company in the past year. She also worked closely with an iwi collective on a proposed company purchase , preparing and presenting a comprehensive legal due diligence report. Emma also advises a number of well-known local businesses on their ongoing commercial matters, providing practical, strategic advice that supports long-term growth. Her approach is grounded in clarity and confidence. Emma believes in making informed advice and offering clients clear guidance on the best course of action, drawing on her extensive experience to ensure legal solutions are both robust and realistic. Clients value her ability to simplify complex issues and provide advice that is both practical and reassuring. One particularly memorable transaction saw Emma finalising a large-scale deal while on holiday in Bali , after a delayed completion date meant the matter couldn’t be delegated. Despite the challenge, she ensured the transaction was completed successfully, demonstrating her commitment to client outcomes (and was grateful for Willis Legal’s investment in cloud-based technology, meaning she could work from Bali). Emma is passionate about helping businesses set themselves up for success from the outset. She regularly advises on shareholders’ agreements, lease agreements, and other foundational documentation, areas where early attention can prevent costly complications later. Her work helps clients avoid common pitfalls and build strong legal frameworks that support future growth. Looking ahead, Emma sees exciting developments in the commercial space, particularly with the rise of AI and the shift toward remote and digital service delivery. She encourages businesses to stay agile and embrace these changes to remain competitive. Emma enjoys getting to know each business she works with, understanding how they operate and helping to put in place the right structures to support their goals. Her thoughtful, strategic approach makes her a trusted advisor to many . Emma has been with Willis Legal since she moved from Auckland back to Hawke’s Bay in 2012, and has been a partner since 2020. She is an integral part of our Willis Legal team and plays a key role in supporting the success of our clients.
6 October 2025
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