Most NZ business partnerships fail in one of two ways. Founders never put a shareholders agreement NZ in place, or they sign a template that doesn't reflect how their business actually runs. Both leave shareholders exposed when circumstances change. This guide covers what an enforceable shareholders agreement must contain, how it differs from a company constitution, and the mistakes that quietly turn small disagreements into expensive disputes.
What does a Shareholders Agreement actually do?
A shareholders agreement NZ is a private contract between the shareholders of a company. It sits alongside the company constitution and fills in the gaps the Companies Act 1993 does not cover. At its core it governs three things. How the company is run, how money flows between shareholders and what happens when circumstances change.
It also provides protections that statutory company law simply does not. Non-compete obligations on departing shareholders, pre-emption rights that stop shares being transferred to outsiders, and dispute mechanisms that can resolve deadlock without involving the courts.
Common mistake: relying on the company constitution alone. A constitution governs the company as a legal entity. It does not impose personal obligations on individual shareholders or restrict what they can do outside the business.
How is the agreement different from the company constitution?
A constitution is a public document filed with the Companies Office. It deals with structural matters like share classes, director powers and meeting procedures. Many NZ companies operate under the model rules in the Companies Act 1993 without a constitution at all.
A shareholders agreement is a private contract. It is not filed anywhere and is not publicly accessible. It can cover matters the constitution cannot, such as personal obligations on individual shareholders, confidentiality, non-compete restrictions and specific exit arrangements. In practice you need both. The constitution governs the company. The shareholders agreement governs the relationship between the people who own it.
Why do pre-emption rights matter so much?
Pre-emption rights, sometimes called right of first refusal, require a shareholder who wants to sell to first offer their shares to existing shareholders before selling to an outside party. Without pre-emption rights, a shareholder can transfer shares to anyone, including a competitor or a third party the other founders have never met.
The mechanics matter. The agreement needs to specify how the price is set when pre-emption is triggered, typically by reference to net asset value, a multiple of earnings or an independent accountant's determination. A vaguely worded clause that doesn't deal with pricing can be just as problematic as having no clause at all.
What happens in a 50/50 deadlock?
A 50/50 shareholding is the most common partnership structure in New Zealand and the most dangerous one to operate without an agreement. When two equal shareholders disagree on a major decision, neither can outvote the other. The business stalls.
A well-drafted shareholders agreement includes a clear deadlock resolution mechanism. Common approaches include a mediation step with an agreed third party, a Russian Roulette or shoot-out clause where one party sets a price and the other must buy or sell at that price, or a put and call option structure that allows one party to exit. The right mechanism depends on the partnership and the assets involved. This is one of the most important clauses to get right.
Best practice: any 50/50 partnership should include both a mediation step and a binding tie-break mechanism. Mediation handles most disagreements. The tie-break ensures the business never gets stuck if mediation fails.
What should a shareholder exit process cover?
A comprehensive exit provision covers voluntary departure, compulsory transfer events (death, incapacity, insolvency or breach of the agreement), drag-along rights where the majority can require the minority to sell in a whole-business sale, and tag-along rights where the minority can require their shares to be sold on the same terms.
The valuation mechanism is critical. Common approaches include a formula based on financial metrics, an independent accountant's determination or a combination. The agreement should also address what happens to shareholder loans and any employment arrangements when a shareholder exits, since these are usually intertwined with the share position.
When should we put a Shareholders Agreement in place?
The best time is at the start of the relationship, before any disagreement exists and while all parties are motivated to reach a fair outcome. You can add or update an agreement at any point, and many NZ businesses do so when they bring in a new shareholder, take on investment or change direction. But it gets significantly harder to negotiate terms when one party feels the current arrangements favour them.
For existing partnerships without an agreement, the time to act is now, before a dispute makes negotiation impossible. A documentation health check is often a good starting point to see where the gaps are.