How Share Splits Work for NZ Startups and Small Businesses

If you’re building a startup or growing a small business in New Zealand, “share splits” tend to come up at the exact moment things start getting real - when a co-founder joins, an investor wants in, or you’re thinking about offering equity to key team members.

The tricky part is that people often use “share splits” as a catch-all phrase for a few different things: splitting ownership between founders, issuing new shares, creating a share option pool, or even doing a “share split” in the technical corporate sense (like turning 1 share into 10 shares).

This guide breaks share splits down in plain English, from a business-owner perspective, so you can make confident decisions and avoid cap table surprises later.

What Is A Share Split (And What Isn’t It)?

In day-to-day startup talk, “share splits” usually means how the ownership of your company is divided - for example, 50/50 between two founders, or 70/20/10 between three founders.

But legally, there are a few different concepts that can sit underneath that one phrase.

1) The “Founder Share Split” (Ownership Percentages)

This is the most common meaning: you’re deciding what percentage each founder (or early shareholder) will own.

That percentage is calculated from:

• how many shares each person holds; divided by
• the total number of shares on issue.

Example: If your company has 100 shares total, and you hold 60 shares, you own 60%.

2) A “Share Split” In The Technical Sense (Splitting Each Share)

A true share split is where the company changes the number of shares without changing the underlying ownership percentages - for example, every 1 share becomes 10 shares.

Example: You own 60 out of 100 shares (60%). If the company does a 10-for-1 share split, you own 600 out of 1,000 shares (still 60%).

Why do this? Usually to make the share price look “smaller” for investment purposes, or to create more flexibility for issuing shares and options (though you can often achieve the same outcome with careful share allotments).

3) Issuing New Shares (Which Changes The Split)

Another common “share split” moment happens when your company issues new shares to a new founder, an investor, or an employee share scheme.

This is different to a technical share split because it can dilute existing shareholders.

Example: You own 60 out of 100 shares (60%). If the company issues 50 new shares to an investor, there are now 150 shares total. You still own 60 shares, but now that’s 40%.

This is why share splits aren’t just about what feels “fair” - they’re about control, voting power, future fundraising, and how value is shared when the business grows.

Why Do NZ Businesses Do Share Splits?

A good share split should support how your business actually operates - not just what looks tidy on paper.

Here are some common business reasons we see NZ startups and small businesses revisit share splits.

You’re Bringing In A Co-Founder (Or Formalising Contributions)

Maybe you started solo and someone is now joining to build product, sell, or run operations. Or maybe you began with a friend and never properly documented the arrangement.

Getting the share split right early can prevent disputes later, especially if roles change, someone stops contributing, or expectations don’t match reality.

You’re Raising Investment

Investors will usually want a clear, well-documented cap table and an ownership structure that makes sense.

Even if the investor is happy with the numbers, they’ll often want clarity around:

• who controls board decisions (if you have a board);
• who controls shareholder decisions (voting);
• whether there are pre-emptive rights (rights of first refusal) on new issues/transfers;
• what happens if a founder leaves.

In other words: share splits are rarely “just maths” once money comes in.

You Want To Incentivise Key People Without Losing Control

Many growing businesses consider equity incentives to attract or retain key people (especially when cash is tight).

That could involve issuing shares now, or setting up a plan where equity is earned over time. If you’re exploring vesting, it helps to understand share vesting and how it can be used to protect the company if someone leaves early.

You’re Planning Ahead For A Sale Or Succession

Even if an exit feels far away, your share structure affects how a future sale works - including who needs to approve the sale, who gets paid, and whether minority shareholders can block a deal.

Cleaning up share splits early can make due diligence smoother and reduce the risk of last-minute disagreements.

How Do Share Splits Work Under NZ Company Law?

Once you move beyond a casual “we’re 50/50” conversation, share splits become a legal and governance exercise.

In New Zealand, the key framework is the Companies Act 1993, plus your company’s internal documents (especially your constitution, if you have one) and any shareholders agreement.

Here are the legal mechanics that typically matter most for share splits.

Your Company’s Constitution And Shareholder Rules

If your company has a Company Constitution, it often sets out rules around:

• how shares can be issued;
• how shares can be transferred;
• pre-emptive rights (who gets first right to buy shares or subscribe for new shares);
• different classes of shares (if applicable);
• director decision-making and shareholder voting thresholds.

If you don’t have a constitution, the default rules in the Companies Act apply. Importantly, the Act includes default pre-emptive rights on the issue of new shares (subject to certain exceptions) unless your constitution modifies or excludes them - so it’s worth checking what your company has (or hasn’t) adopted before you assume there are no pre-emptive rights.

Issuing Shares: Director Resolutions, Consideration, And Records

If you’re changing the ownership split by issuing new shares, you need to do it properly - not just by sending an email saying “done”.

A share issue generally involves:

• checking your constitution/shareholder agreement for restrictions and approval requirements (and whether shareholders must approve the issue in your circumstances);
• directors passing resolutions approving the issue and the terms;
• confirming the price (or other “consideration”) being paid for the shares;
• updating the share register; and
• making any required updates with the Companies Office (for example, through your annual return or other required filings, depending on the change).

It’s also important to understand the legal concept of a “share issue” (and when shareholder approvals may be required). If you’re mapping out the process, Company Issue Of Shares is a useful reference point for the typical steps and pitfalls.

Share Transfers: Selling Or Giving Shares To Someone Else

Sometimes the “share split” changes because an existing shareholder transfers shares to another person (for example, one founder sells part of their shares to a new founder, or to an investor).

This often triggers:

• pre-emptive rights (others get first chance to buy);
• director approval requirements (depending on your documents);
• share transfer forms and updates to the share register.

For the practical steps involved, How To Transfer Shares is a good starting point - but the key is making sure your transfer aligns with your constitution and any deal terms you’ve agreed to.

Be Careful With “Handshake Equity”

It’s common for early-stage businesses to promise equity informally - “we’ll give you 10%” - before anyone thinks through what that actually means legally.

From a risk perspective, informal share splits can lead to:

• disputes about whether the person was meant to receive shares or options;
• confusion about whether equity was conditional on performance or time;
• difficulty raising capital (investors don’t like uncertainty in the cap table);
• messy exits when someone leaves.

If you’re going to split equity, it’s worth doing it properly from day one - even if the company is still small.

Common Share Split Scenarios For Startups And Small Businesses

There’s no single “best” share split for every NZ business. But there are common patterns - and common traps - that come up across industries.

Scenario 1: Two Co-Founders (50/50 Or Not?)

A 50/50 share split sounds fair, and sometimes it is. But it can also create deadlocks, where neither founder can make key decisions without the other.

Questions worth asking before you lock in a 50/50 split include:

• Who will be the CEO / primary decision-maker day-to-day?
• What happens if you disagree on a major decision (raising capital, hiring, selling, taking on debt)?
• What happens if one founder wants to leave or stops contributing?

Even if you keep 50/50 ownership, you can sometimes reduce the risk of deadlock through well-drafted governance clauses in your documents (for example, dispute resolution processes or defined decision rights).

Scenario 2: Adding A Third Founder Later

Adding a founder later often feels more complicated because the business already has momentum. The earlier founders may have taken the initial risk, but the new founder might be bringing critical skills needed to scale.

In practice, you’ll want to work through:

• whether the new founder is buying shares, receiving newly issued shares, or earning equity over time;
• how dilution will affect each existing shareholder;
• whether vesting applies to everyone (not just the new person) to keep things consistent.

If you’re in this stage, it can help to model your cap table and sanity-check what “10%” or “25%” actually means post-investment, not just today.

Scenario 3: Issuing Shares To An Investor (And Protecting Control)

Investment typically means dilution - but dilution isn’t always bad if it funds growth and increases the value of what you still own.

Where founders can get caught out is agreeing to a share split without considering:

• voting rights (does the investor get voting shares or non-voting shares?);
• reserved matters (decisions requiring investor consent);
• future rounds (how much equity you’ll need to leave available);
• pre-emptive rights (can existing holders participate in future issues?);
• transfer restrictions (can the investor sell to someone you don’t want involved?).

This is where a well-structured Shareholders Agreement becomes extremely valuable, because it sets the “rules of the game” while relationships are still good.

Scenario 4: Setting Up An Employee/Contractor Equity Incentive

Many businesses want to reward key people with “skin in the game”. The legal structure matters a lot here, because giving someone shares outright is very different from giving them the opportunity to earn shares over time.

Common approaches include:

• issuing shares now (simple, but you’re giving immediate ownership and voting rights unless you create different share classes);
• vesting shares (shares are issued but subject to buy-back/forfeiture rules if the person leaves early);
• options or phantom equity (often used where you want incentives without immediate shareholding).

If the person is also doing work for the business, make sure the relationship is documented properly too - equity discussions don’t replace the need for a clear employment or contractor arrangement.

Scenario 5: “We’ll Figure It Out Later” (The Most Expensive Split)

It’s normal to be focused on customers, product, and cashflow in the early days - and to push legal structure down the list.

But leaving share splits unclear tends to create expensive problems later, like:

• disputes over what was promised;
• minority shareholders blocking decisions;
• investors requiring a restructure before they’ll invest;
• unexpected tax or compliance issues when equity is granted.

It’s almost always easier (and cheaper) to put good documents in place early than to fix things under pressure.

Key Legal Documents To Get Right Before You Change Your Share Structure

Share splits don’t exist in isolation. They’re tied to your governance, decision-making, IP ownership, and what happens if someone leaves.

These are the documents we commonly recommend reviewing when you’re planning a share split or any change to your cap table.

Shareholders Agreement

A shareholders agreement is where you set practical rules around ownership and control. Depending on your business, it may cover:

• how decisions are made (and what requires unanimous consent);
• what happens if a shareholder wants to exit;
• how shares can be sold or transferred;
• what happens if someone stops working in the business;
• deadlock and dispute resolution processes.

If you’re splitting equity between founders (or bringing investors in), a Shareholders Agreement is one of the best ways to protect the business relationship while things are going well.

Company Constitution

Your constitution is essentially the company’s rulebook. It can work alongside (and sometimes be reinforced by) a shareholders agreement.

For businesses planning to grow, a tailored Company Constitution can help you manage issues like pre-emptive rights, share classes, and director/shareholder powers more cleanly than relying on default rules alone.

Share Vesting Arrangements

If shares are being issued to founders or key contributors, vesting can help ensure equity reflects actual contribution over time - not just what someone promised at the beginning.

To understand the concept (and what it’s trying to protect you from), it’s worth reading up on share vesting before you lock anything in.

Share Issue And Allocation Records

Any time you issue shares or change ownership, you need accurate records and correct approvals.

In practice, that includes keeping your cap table and share register consistent with:

• director resolutions;
• subscription letters/agreements (if someone is paying for shares);
• updated shareholder details;
• any required Companies Office updates (often handled through your annual return, unless another filing is required for the particular change).

If you’re still working out what a “good” split might look like at the earliest stage, How To Allocate Shares In A Startup is a helpful way to sanity-check your approach before you paper it.

Transfer Mechanics (If Someone Is Buying Or Selling Shares)

If your share split changes via a transfer (rather than a new issue), make sure you follow the right process. Getting this wrong can cause real headaches later - especially if there are competing versions of “who owns what”.

As a starting point, How To Transfer Shares covers typical steps, but your constitution and shareholders agreement will often add extra requirements you need to follow.

Tax And Disclosure Considerations (Don’t Ignore These)

Depending on who is receiving shares (founders, employees, contractors, investors) and what they’re paying, there may be tax and disclosure considerations.

For example:

• employee or contractor equity can raise questions about whether value is being provided in connection with services (and how that’s treated);
• raising funds can trigger separate legal obligations depending on how the offer is structured (including under the Financial Markets Conduct Act 2013 in some cases).

This is general information only and isn’t tax, financial, or accounting advice. Because tax and fundraising rules are highly fact-specific, it’s a good idea to get tailored legal advice and speak with your accountant before implementing any equity or fundraising structure.

Key Takeaways

• “Share splits” can mean different things - a founder ownership split, issuing new shares (dilution), transferring existing shares, or a technical share split that changes share count but not percentages.
• Issuing new shares changes the ownership split unless everyone is issued shares proportionally; it’s crucial to model dilution before you agree to an investment or new founder equity.
• NZ share split changes need to follow the Companies Act 1993 and your company’s own rules (constitution and shareholder arrangements), not just informal agreements.
• A clear Shareholders Agreement can prevent costly disputes by covering voting, decision-making, exits, transfers, and what happens if someone stops contributing.
• Vesting is often a smart tool for founder and key contributor equity, so ownership reflects real contribution over time and protects the company if someone leaves early.
• Accurate records matter - share issues and transfers should be properly approved, documented, and reflected in your share register and cap table.

If you’d like help setting up or reviewing your share splits, sorting out a shareholders agreement, or structuring a share issue or transfer, you can reach us at 0800 002 184 or team@sprintlaw.co.nz for a free, no-obligations chat.