Alex is Sprintlaw’s co-founder and principal lawyer. Alex previously worked at a top-tier firm as a lawyer specialising in technology and media contracts, and founded a digital agency which he sold in 2015.
A share buyback can be an effective way to tidy up your cap table, support an exiting shareholder, or return value to the people who've backed your business.
But it's also one of those "sounds simple, gets technical fast" company law moves. In New Zealand, share buybacks are governed by rules under the Companies Act 1993, and if you get the process wrong you can create headaches for directors, remaining shareholders, and future investors.
In this guide, we'll walk you through what a share buyback is, when it makes sense, and the practical legal steps to do it properly (without overcomplicating it). This information is general only and isn't a substitute for legal or tax advice.
What Is A Share Buyback (And Why Do Companies Do One)?
A share buyback is when a company acquires its own shares from an existing shareholder. Depending on how it's structured under the Companies Act 1993, the acquired shares are typically cancelled and the number of shares on issue reduces. (Unlike some overseas regimes, New Zealand companies generally don't hold "treasury shares" in the same way - in practice, many buybacks result in cancellation, but the legal effect depends on the mechanism used and the documentation.)
From a business owner's perspective, buybacks are often used to:
- Help a founder or early investor exit when there isn't a third-party buyer lined up.
- Resolve a dispute by buying out a shareholder who no longer fits the direction of the company.
- Simplify your cap table before raising capital (investors often like clarity on who owns what, and why).
- Return surplus cash to shareholders in a structured way (where appropriate).
- Support employee incentive arrangements in some cases (though often an employee share scheme is structured differently).
One key thing to understand early: a buyback isn't just a "private deal" between a shareholder and the company. Because the company is using its funds (and changing its share structure), the law requires a process designed to protect:
- the company's ability to pay its debts (creditor protection); and
- the rights of other shareholders (fairness and proper approvals).
When Does A Share Buyback Make Sense For A Small Business Or Startup?
Not every exit or ownership change needs a buyback. Sometimes a straightforward transfer between shareholders (or to a new buyer) is simpler and cheaper.
A share buyback is often a good fit when:
You Want The Business To "Buy Out" A Shareholder
If the remaining founders don't personally have the funds to purchase shares, but the company has healthy retained earnings/cashflow, a buyback can be a practical path (provided the company can still meet the solvency requirements).
You're Preparing For Investment Or A Restructure
Investors may want to see that:
- non-contributing shareholders have exited; or
- the cap table is clean (for example, not split across many tiny parcels of shares).
That said, if you're also changing governance settings (like decision-making rights, investor protections, or transfer rules), it's usually wise to tighten up your Shareholders Agreement at the same time.
A Founder Is Leaving And The Relationship Could Get Messy
In early-stage companies, the biggest risk often isn't "competitors" - it's misalignment between the people who own the company. If someone exits but keeps their shares, they can still have voting rights and access to certain information.
Where a buyback is part of a clean break, it's also common to document the broader separation terms (confidentiality, IP, restraints where appropriate, releases) in a deed. If you're doing this in the context of a dispute, getting tailored advice early can save you a lot of cost later.
You Need To Be Careful About Cashflow
Even if the buyback price is "fair", a buyback can be risky if it strips the company of working capital. A buyback that leaves the company unable to pay suppliers, tax, or payroll is where directors can get exposed.
So the practical question isn't just "do we want a buyback?" - it's:
- can the company afford it (now and after the buyback)? and
- can we follow the process so it's valid and enforceable?
What Legal Rules Apply To A Share Buyback In New Zealand?
In New Zealand, a share buyback is regulated under the Companies Act 1993. The Act sets out different ways a company can acquire its own shares, and the approvals, notices, and safeguards required will depend on the method used and what your constitution says.
While the details can vary depending on the type of buyback, the key legal concepts you'll keep running into are:
1) The Solvency Test
Before a company can buy back shares, the directors must be satisfied the company will meet the solvency test immediately after the buyback (and, in some cases, at relevant points during the process).
In practical terms, this means the company must be able to:
- pay its debts as they become due in the normal course of business; and
- have assets greater than liabilities (including contingent liabilities).
This is not a box-ticking exercise. Directors should treat it as a genuine assessment, supported by up-to-date financials. If you're unsure how to document the decision-making properly, a Directors Resolution (tailored to the transaction) is commonly part of a well-run process.
2) Shareholder Approvals (Often A Special Resolution)
Many buybacks require shareholder approval, but the exact pathway depends on the type of buyback and your constitution. Depending on structure, this might be:
- a special resolution (typically 75% approval), or
- another approval mechanism permitted under the Act (for example, a unanimous shareholder agreement/assent in some circumstances).
It's also important to check whether your Company Constitution has specific rules about buybacks, share transfers, or shareholder voting thresholds. If it does, you need to follow those rules as well as the Act.
3) Equal Treatment vs Selective Buybacks
Not all buybacks are the same. A company might:
- make an offer to all shareholders (broad-based buyback); or
- buy back shares from one specific shareholder (a selective buyback).
Selective buybacks often require more care, because other shareholders may reasonably ask: "Is the deal fair" Are we being treated properly? Is the valuation appropriate?? It's also important to consider any shareholder classes and rights, and whether anyone is receiving a benefit that could trigger additional approvals or disclosure.
4) Disclosure, Company Records, And Updates
A buyback usually triggers a chain of admin updates, such as:
- updating the share register and shareholdings;
- recording board and shareholder resolutions;
- issuing (or cancelling) share certificates if relevant; and
- ensuring Companies Office records reflect the current structure where required.
If your buyback is happening alongside a broader ownership shift (for example, new shareholders coming in or founders exiting), it may overlap with Changing Company Ownership processes as well.
How To Run A Share Buyback Step-By-Step (Practical Checklist)
Every company is a little different, but most share buybacks follow a similar workflow. Here's a practical step-by-step guide to keep you on track.
1) Confirm The Goal And The "Best Tool"
Start with the commercial reality. Ask:
- Is the shareholder leaving voluntarily, or is this part of a dispute?
- Do we want the company to buy the shares back, or should another shareholder (or a new buyer) purchase them?
- Will the buyback be funded from cash reserves, future profits, or staged payments?
Sometimes, a share transfer to a third party is cleaner than a buyback. In other scenarios, a buyback is the simplest way to reduce future friction and keep control with the remaining owners.
2) Check Your Existing Documents
Before you agree to anything, review:
- your constitution (if you have one);
- any shareholders agreement;
- any investment documents that include consent rights, pre-emptive rights, or restrictions; and
- any vesting or employee equity terms (if relevant).
If your governance documents aren't clear (or haven't been touched since the early days), it's common to tidy them up alongside the buyback. This avoids future disputes about valuation, voting power, or transfer rules.
3) Agree The Commercial Terms (Price, Timing, Conditions)
For most small businesses and startups, the hardest part isn't the legal mechanism - it's agreeing on the deal.
Common terms to settle upfront include:
- Buyback price (and how it's calculated).
- Payment timing (lump sum vs instalments).
- Conditions (for example, subject to shareholder approval, solvency confirmation, or third-party consents).
- What else is being released (claims, disputes, IP, confidentiality, restraints).
This is where a properly drafted buyback document matters. You want the paperwork to reflect what you actually agreed, and to protect the company from "surprises" later.
4) Run The Solvency Assessment (Properly)
Directors should consider current and forward-looking financials, including:
- bank balances and cashflow forecasts;
- debts due in the coming weeks/months (suppliers, PAYE, GST, loans);
- any contingent liabilities (warranties, disputes, guarantees); and
- whether the company is seasonal or exposed to revenue fluctuations.
If the company can't comfortably meet the solvency test after the buyback, it's usually a sign you need to restructure the deal (for example, staged payments) or use a different exit pathway.
5) Prepare The Resolutions And Approvals
Depending on the type of buyback, you may need:
- a board resolution approving the buyback and confirming solvency;
- a shareholder special resolution approving the buyback (or another form of shareholder approval permitted under the Act); and
- specific notices or disclosures required under the Companies Act.
This is also where startups sometimes get caught out: even if "everyone is on board", you still need the approvals recorded correctly. Future investors and due diligence teams will look at your cap table history, and missing approvals can delay a raise or acquisition.
6) Sign The Share Buyback Documentation
The agreement should clearly cover:
- who is selling and who is buying (the company);
- number/class of shares being bought back;
- purchase price and payment mechanics;
- warranties and acknowledgements;
- tax considerations (handled with your accountant); and
- any settlement terms if it's part of a broader exit.
Tax can be a key issue here (for example, whether the payment is treated as a dividend or on capital account can depend on the facts), so it's worth getting your accountant involved early alongside legal advice.
If you want the process handled end-to-end with proper documents, a Share Buyback Agreement package is often the cleanest way to make sure the transaction is compliant and investor-ready.
7) Update The Share Register And Company Records
Once the buyback completes, make sure you:
- update your share register immediately;
- file and store signed resolutions and agreements;
- update any cap table tools you use internally; and
- confirm what the new ownership and voting position is.
If you're doing a buyback as part of an overall restructure (for example, new shareholders coming in at the same time), it may also be worth documenting the wider transaction with a clean set of capital-raising or sale documents. In some cases, you might instead be looking at a Share Sale Agreement where a third party buys the shares.
Common Share Buyback Pitfalls (And How To Avoid Them)
A share buyback is one of those transactions where the mistakes are often invisible until later - usually during an investor due diligence process, a dispute, or a Companies Act compliance check.
Here are the common pitfalls we see with small businesses and startups.
Not Checking The Constitution Or Shareholder Rules
Your constitution or shareholders agreement might require:
- extra approvals;
- pre-emptive offers to other shareholders;
- director/ shareholder consent thresholds; or
- specific valuation mechanisms.
If you skip these steps, the buyback could be challenged, and you can end up with a "half-finished" ownership change that's hard to unwind.
Undervaluing Documentation (Especially In Founder Exits)
If a founder is exiting, the buyback is often only one piece of the puzzle. You may also need to address:
- ownership of IP created by the founder;
- confidential information and client relationships;
- ongoing work or handover obligations; and
- whether any restraints are appropriate.
Trying to patch this together with informal emails can create disputes later - particularly if the business grows and the stakes rise.
Getting The Solvency Test Wrong
From a director's perspective, this is the big one. If the company can't meet its debts after the buyback, the decision can expose directors to personal risk.
If cashflow is tight, it's worth exploring alternatives like:
- staged payments conditional on solvency at each stage;
- share transfers between shareholders instead of a company buyback; or
- restructuring the deal so the exit happens over time.
Forgetting About Future Investors
Even if a buyback feels like an internal housekeeping task, investors will often ask:
- Were the correct approvals obtained?
- Was the buyback properly documented?
- Is the cap table accurate?
- Are there any side promises to the exiting shareholder?
Doing it properly now helps you move faster later - especially when you're under time pressure during a raise.
Key Takeaways
- A share buyback is when a company acquires its own shares (often resulting in cancellation), and it can be a practical tool for founder exits, cap table clean-ups, and restructures.
- In New Zealand, share buybacks are regulated by the Companies Act 1993, and the process matters - even if all shareholders "agree in principle".
- The solvency test is central: directors need to be satisfied the company can still pay its debts and has assets exceeding liabilities immediately after the buyback.
- Your constitution and shareholders agreement may impose additional rules, approvals, or valuation mechanisms you must follow.
- A good share buyback process includes clear commercial terms, correctly recorded approvals/resolutions, properly drafted buyback documentation, and updated company records.
- If the buyback is part of a broader founder exit or dispute, you'll usually need extra legal documentation to properly protect the business (not just a buyback form).
If you'd like help planning or completing a share buyback (including getting the documents right and keeping your company compliant), you can reach us at 0800 002 184 or team@sprintlaw.co.nz for a free, no-obligations chat.


