Share Dilution in New Zealand: Risks, Benefits & Mitigation for Startups

Note: This article is general information only and doesn’t take into account your specific circumstances. Raising capital and issuing equity can also have tax and financial reporting implications - it’s worth getting legal, accounting and tax advice before you proceed.

If you’re building a startup or growing SME in New Zealand, raising money and bringing in key people often means giving away equity.

That’s where share dilution comes in. It’s a normal part of growth, but it can also create real headaches if you don’t understand how it works (or you rush into it without the right documents).

In this guide, we’ll walk through what share dilution is, why it happens, the key risks and benefits for NZ businesses, and practical strategies to manage dilution while still attracting investors and talent.

What Is Share Dilution (And Why Does It Matter For NZ Businesses)?

Share dilution happens when a company issues new shares (or grants rights that convert into shares), and existing shareholders end up owning a smaller percentage of the company than they did before.

It’s important to note: dilution is about ownership percentage, not necessarily the dollar value of your investment.

A Simple Example Of Share Dilution

Let’s say your company has 100 shares on issue:

• You own 60 shares (60%)
• Your co-founder owns 40 shares (40%)

If the company issues 100 new shares to an investor (so 200 shares total):

• You still own 60 shares, but now it’s 30%
• Your co-founder still owns 40 shares, but now it’s 20%
• The investor owns 100 shares (50%)

No one “took” your shares from you - but your stake was diluted because the total pie got bigger.

Why Dilution Can Feel Personal (Even When It’s Normal)

In a small business, shareholding is closely tied to:

• Control (voting power and decision-making)
• Economic rights (dividends and proceeds on exit)
• Founder motivation (feeling like you still “own” what you’re building)

So even if dilution is commercially sensible, it can create tension unless it’s planned and explained clearly.

How Does Share Dilution Happen In Practice?

Most NZ companies dilute for one of these reasons: raising capital, incentivising people, or restructuring ownership.

1) Issuing New Shares To Raise Capital

This is the most common trigger. You might issue shares to:

• angel investors
• seed or growth investors
• friends and family (be careful here - good intentions can still lead to disputes)
• strategic partners

If you’re raising funds, you’ll often use a subscription process and documents that set out price, number of shares, and conditions. Depending on the deal, you might use something like a Share Subscription Agreement to keep the terms clear and enforceable.

Important: fundraising can also trigger Financial Markets Conduct Act 2013 (FMCA) obligations (for example, whether you’re making an “offer of financial products” and whether an exclusion applies). Don’t assume you can raise from anyone without checking disclosure and compliance requirements first.

2) Employee Or Contractor Equity Incentives

Equity incentives can be a great way to attract and retain key people when cash is tight. But they can dilute founders and early investors if you don’t plan your “equity pool” properly.

Equity incentives commonly include:

• share options
• phantom shares (economic benefit without actual shares)
• restricted shares
• vesting arrangements

If you’re setting up vesting (common for founders and key hires), a Share Vesting Agreement can help you set clear rules for what happens if someone leaves early.

Also note: employee share schemes and equity incentives can have tax and payroll implications (for both the company and the recipient), so get tax/accounting advice before you finalise your structure.

3) Convertible Instruments That Later Convert Into Shares

Some funding tools don’t dilute you immediately, but they can later. For example, a convertible note generally converts into shares at a later date (often at a discount, or with a valuation cap), which can cause dilution when conversion happens.

Also note: conversion instruments can raise both securities law and tax/accounting issues (including how the instrument is treated before conversion), so it’s worth getting advice early - not just at the conversion date.

4) Issuing Shares For Non-Cash Value

Sometimes companies issue shares to pay for:

• services (e.g. development work)
• assets (e.g. IP or equipment)
• business acquisitions

This can make sense commercially, but it can be risky if the valuation of the contribution is unclear or later disputed.

5) Changes Required By Your Constitution Or Shareholder Approval

In New Zealand, share issues are usually governed by the Companies Act 1993, your company’s constitution (if you have one), and any shareholders’ agreement.

If you don’t have a constitution, the default rules in the Companies Act apply - and they don’t always reflect what founders and investors actually want. Putting a tailored Company Constitution in place early can make future share issues and approvals much smoother.

What Are The Risks Of Share Dilution For Startups And SMEs?

Dilution isn’t automatically “bad”. But it can be a problem when it’s unplanned, misunderstood, or happens faster than your business value grows.

Losing Control Of Your Company

The big one founders worry about is control.

If new shares carry voting rights (or special voting rights), dilution can mean you no longer have the votes to:

• appoint or remove directors
• approve major transactions
• block changes to the constitution
• control the direction of the business

Even if you stay as managing director day-to-day, you can end up in a position where shareholders can outvote you on key decisions.

Investor Terms That Increase Dilution Later

Some funding terms can worsen dilution over time, including:

• anti-dilution rights (often triggered by down-rounds)
• preference shares with enhanced economic rights
• option pools created after an investor invests (meaning founders effectively bear the dilution)

These aren’t inherently unreasonable - but you want to understand the commercial impact before signing.

Founder And Co-Founder Disputes

Share dilution can bring underlying co-founder issues to the surface, like:

• “I’m doing more work, why am I being diluted the same?”
• “I didn’t agree to this investor having that much control.”
• “We never agreed on how future fundraising would work.”

This is why it’s so important to agree upfront on governance rules and future share issue rules in a Shareholders Agreement.

Reduced Upside On Exit

Ultimately, shares are about what you get paid when there’s an exit (sale of business, share sale, or sometimes dividends).

If your ownership percentage drops significantly, your share of the exit proceeds might be much smaller than you expected - even if the company sells for a healthy amount.

Administrative And Compliance Issues

Issuing shares isn’t just a handshake.

You need to get the process right (including director approvals, any shareholder approvals required, share register updates, and any constitution requirements). Sloppy share issues can lead to:

• invalid or disputed shareholdings
• governance deadlocks
• problems in due diligence when you raise again or sell

Also remember: even if your internal company approvals are correct, a capital raise may still need to comply with securities law (including under the FMCA) depending on who you’re raising from and how the offer is made.

Getting your legal foundations right early saves a lot of cleanup later.

Are There Benefits To Share Dilution (And When Is It Actually A Good Thing)?

Yes - in the right circumstances, dilution can be a smart trade-off.

You Can Raise Capital To Grow Faster

If issuing shares brings in funds that help you grow revenue, expand into new markets, hire key talent, or build product faster, you may end up with:

• a smaller percentage of a company that is worth much more, and
• a better chance of survival and scale

The key question is: are you being diluted in exchange for real value?

You Can Bring In Strategic Expertise And Networks

Some investors and strategic shareholders bring more than money. They might bring:

• industry expertise
• supplier or customer introductions
• credibility in the market
• governance discipline

That can be worth dilution if it materially improves your odds of success.

You Can Incentivise Key People Without Burning Cash

Equity incentives can help you compete for great people when you’re not ready to pay “market” salaries.

But you should still document roles and expectations properly - equity doesn’t replace employment basics. For example, if you’re hiring staff, you still need a fit-for-purpose Employment Contract so you’re protected from day one.

You Can Set Clear Ownership Rules For The Long Term

Planned dilution (with agreed rules around future fundraising, approvals, and exit) can actually reduce conflict because everyone knows what to expect.

That’s very different from “surprise dilution” where shareholders feel blindsided.

How Can You Mitigate Share Dilution? Practical Strategies For Founders

You usually can’t grow without some form of dilution - but you can manage it. Here are practical strategies we often see founders use in New Zealand.

1) Plan Your Capital Structure Early

Before you issue shares, it helps to map out:

• how many shares are on issue now
• what percentage founders will hold after the next raise
• how big an employee option pool you’ll need
• how many rounds you expect (even a rough estimate helps)

This is less about predicting the future perfectly, and more about avoiding avoidable surprises.

2) Use Pre-Emptive Rights (So Existing Shareholders Can Maintain Their Percentage)

Pre-emptive rights can allow existing shareholders to buy new shares before outsiders do, so they have a chance to maintain their percentage ownership.

In New Zealand, the Companies Act 1993 includes statutory pre-emptive rights on the issue of new shares unless they’re modified or excluded by your constitution, or an exception/approval applies. Whether (and how) these rights operate in your company will depend on your constitution (if any), any shareholders’ agreement, and the specific share issue process.

Pre-emptive rights can be great for protecting existing shareholders, but they can also slow down fundraising if they’re too rigid - so it’s about finding the right balance.

3) Set Clear Rules For Issuing Shares In A Shareholders Agreement

A strong shareholders agreement is one of the best tools to manage dilution because it can deal with:

• when shares can be issued and who approves it
• pre-emptive rights and exceptions (e.g. employee option pool)
• different share classes (if used)
• reserved matters requiring special approval thresholds
• what happens on an exit

Most importantly, it gets everyone aligned before money is on the table and emotions are high.

4) Consider Vesting For Founders And Key Team Members

If you’re worried about someone leaving early but keeping a large stake, vesting can help align long-term contribution with ownership.

For example, a founder might “earn” their shares over time (or risk having some transferred back if they leave early). This can reduce resentment when dilution occurs later because the cap table reflects ongoing contribution.

5) Be Careful With Valuation (Dilution Is Often A Valuation Problem)

The higher the valuation, the fewer shares you usually need to issue for the same amount of capital - meaning less dilution.

Of course, valuation needs to be commercially defensible. Overinflated valuations can create different problems later (like a down-round that triggers tougher investor rights). But founders should still understand the valuation-dilution trade-off before accepting a term sheet.

6) Negotiate Governance, Not Just Percentage

Founders often focus on “how much of the company am I giving away?”

Sometimes the more important issue is:

• what voting rights come with the shares?
• who appoints directors?
• what decisions require investor consent?

You might accept some dilution if you retain practical control over day-to-day operations and have fair rules around major decisions.

7) Keep Your Records And Share Issues Clean

Even if your deal terms are great, messy paperwork can cause delays and disputes later - especially when you go to raise again or sell the business.

Make sure your company is properly administered, including:

• director resolutions
• shareholder approvals where required
• updated share register
• properly executed subscription documents

If you’re ever planning a sale, clean share records will also make due diligence smoother - which can help protect price and reduce deal friction.

Key Takeaways

• Share dilution occurs when your company issues new shares (or convertible rights convert), reducing existing shareholders’ percentage ownership.
• Dilution isn’t automatically negative - if the capital, talent or strategic value increases the company’s overall value, you may be better off even with a smaller percentage.
• The biggest risks of dilution for founders and SMEs include loss of control, unexpected investor-favourable terms, co-founder disputes, and reduced exit proceeds.
• You can mitigate dilution by planning your cap table early, using pre-emptive rights where appropriate, and setting clear rules in a Shareholders Agreement.
• Strong governance documents like a Company Constitution help you manage share issues properly and avoid messy (and costly) disputes later.
• If you’re issuing shares to investors, a clear Share Subscription Agreement helps document price, conditions, and what each party is actually agreeing to.
• If you’re using equity incentives, make sure they sit alongside solid employment fundamentals like an Employment Contract, and consider vesting to align ownership with long-term contribution (and get tax/accounting advice on the incentive structure).

If you’d like help managing dilution, planning a capital raise, or getting your shareholder documents set up properly, you can reach us at 0800 002 184 or team@sprintlaw.co.nz for a free, no-obligations chat.