What Is Share Vesting And What Kind Of Contract Do You Need? (2026 Updated)

If you’re building a startup or growing business in New Zealand, you’ve probably heard the phrase “share vesting” thrown around in founder chats, investor meetings, and term sheets.

It can sound technical, but the idea is pretty simple: share vesting is a way to make sure that the people who are meant to be building the business long-term actually stick around (or at least don’t walk away with a large chunk of equity after a short stint).

This guide is updated for what we’re commonly seeing in NZ deals right now, including how vesting is typically structured, what can go wrong if you don’t document it properly, and what kind of contract you’ll usually need to put in place.

What Is Share Vesting (And Why Do Founders And Investors Care)?

Share vesting is a mechanism that makes ownership of shares (or the right to keep them) conditional on time and/or performance.

In practical terms, it’s used to answer questions like:

• What happens if a co-founder leaves 6 months after launch?
• What if someone stops contributing but still wants to keep their full equity?
• How do we make equity fair when everyone is contributing different amounts over time?

Vesting helps align incentives. It’s common in startups, but it can also be relevant in more traditional businesses where key people are being rewarded with equity (for example, a general manager receiving shares as part of their remuneration package).

How Vesting Usually Works

There are a few common ways vesting is structured in NZ:

• Time-based vesting: shares vest gradually over a set period (often 3–4 years).
• A “cliff”: nothing vests until a minimum period is completed (commonly 12 months), then vesting begins.
• Milestone or performance-based vesting: vesting occurs when certain KPIs, revenue targets, or project milestones are met.
• Hybrid vesting: a mix of time and milestones.

From a business owner’s perspective, vesting is basically risk management. It’s there to stop your cap table (ownership table) becoming messy and unfair if circumstances change.

What’s The Difference Between “Vesting” And “Owning Shares”?

This is where it can get confusing.

Sometimes “vesting” means you don’t receive the shares at all until you’ve earned them. Other times, you receive the shares upfront, but the company has rights to buy them back (or force a transfer) if you leave before they’ve “vested”.

The key point is this: vesting is only as good as the legal documents behind it. Handshake agreements and informal founder chats don’t hold up well when there’s money on the line.

Do You Actually Need Share Vesting In Your NZ Business?

You don’t always need vesting, but it’s worth seriously considering if any of the following apply:

• You have two or more founders and you’re not all contributing equally from day one
• One founder is “full-time” and another is “part-time”
• You expect to raise investment (many investors will ask for vesting)
• You’re offering equity to a key employee or advisor
• You’re worried about what happens if someone leaves early

Even if you trust your co-founders completely (and hopefully you do), vesting isn’t about mistrust. It’s about making sure the business has a fair, pre-agreed process if things don’t go as planned.

A Quick Example (Why Vesting Saves Headaches)

Let’s say you and a co-founder split shares 50/50 when you incorporate. Six months later, they decide startup life isn’t for them and move on.

Without vesting, they may still legally own 50% of the company. That can create ongoing problems, including:

• difficulty raising capital (investors don’t love “dead equity”)
• decision-making deadlocks
• disputes about dividends or exit proceeds later
• a founder who no longer contributes still benefiting from your future work

Vesting is one of the cleanest ways to prevent that situation.

What Kind Of Contract Do You Need For Share Vesting?

In NZ, “share vesting” is usually documented through a combination of company and contract documents.

Exactly what you need depends on whether the person is a founder, employee, contractor, or advisor, and whether shares are issued upfront or later.

Most commonly, you’ll use one (or more) of the following:

1) A Share Vesting Agreement

A dedicated Share Vesting Agreement is often the clearest way to set out the vesting terms in writing.

It can cover things like:

• the vesting schedule (e.g. 4 years with a 12-month cliff)
• what counts as a “good leaver” vs “bad leaver”
• what happens on resignation, termination, death, or incapacity
• whether the company can buy back unvested shares and at what price
• what happens if the company is sold (accelerated vesting rules)

This agreement is especially useful when you want vesting terms to be precise and enforceable, without overloading your other documents.

2) A Shareholders Agreement (Often With Vesting Built In)

Many startups include vesting mechanics inside their Shareholders Agreement (or have the Share Vesting Agreement sit alongside it).

A shareholders agreement is broader than vesting. It typically deals with:

• how key decisions are made
• who can appoint directors
• what happens if someone wants to sell shares
• dispute resolution processes
• confidentiality and restraints (where appropriate)

Vesting fits naturally into this ecosystem because it affects who owns what, and when.

3) A Company Constitution (Sometimes Needed For The Mechanics)

Depending on how the vesting is structured, your Company Constitution may need to support it.

For example, if you want the company to have strong rights to manage share transfers, buybacks, or compulsory transfers in certain situations, you may need to make sure the constitution actually allows that (and that it works alongside the Companies Act 1993 rules).

Not every company has a constitution, but if you’re bringing on multiple shareholders, raising capital, or doing anything complex with equity, it’s usually worth considering.

4) An Option Deed Or Employee Equity Arrangement (If You’re Not Issuing Shares Yet)

Sometimes vesting is implemented through options rather than shares, particularly for employees.

Instead of issuing shares upfront, you grant an option to acquire shares later, subject to vesting conditions. In that case, you might use an Option Deed or an employee share scheme arrangement (depending on the structure).

This can be simpler from a cap table perspective, but it still needs careful drafting so everyone understands what they’re entitled to and when.

5) The Underlying Work Relationship Contract (Employment Or Contractor)

If the person vesting is also working in the business, the vesting documents should match the work arrangement.

• If they’re an employee, you’ll usually want an Employment Contract that aligns with the vesting conditions (for example, notice periods, termination grounds, confidentiality, IP ownership).
• If they’re a contractor, you’d normally document that in a contractor agreement so the role and deliverables are clear (and so IP ownership is properly dealt with).

This is a common mismatch we see: the equity documents assume “continuous service”, but the person’s working arrangement is vague or undocumented. If a dispute happens, that gap becomes a problem very quickly.

Key Terms To Get Right In A Share Vesting Arrangement

Vesting schedules are only one part of the story. The real legal (and commercial) risk is usually in the details.

Here are the clauses that are worth paying extra attention to.

Vesting Schedule And Cliff

This should be unambiguous, including:

• the start date (is it incorporation date, signing date, or employment start date?)
• the cliff period (if any)
• the vesting frequency (monthly, quarterly, annually)
• how rounding works (odd share numbers can get tricky)

Good Leaver vs Bad Leaver

This is where many founder relationships either stay smooth or get very messy.

A “good leaver” might be someone who leaves due to genuine reasons (for example, illness), while a “bad leaver” might be someone who resigns early, is terminated for serious misconduct, or breaches key obligations.

The definitions matter because they often affect:

• whether unvested shares are forfeited
• whether vested shares can be kept
• the price payable if shares are bought back (fair value vs nominal value)

There’s no one-size-fits-all approach here. It needs to reflect your business, the bargaining power of the parties, and what you’d consider “fair” if you were looking back on it in two years’ time.

Buyback Or Transfer Mechanics

If someone leaves before their shares vest, what actually happens?

Common approaches include:

• Company buyback: the company buys back the unvested shares (but buybacks have strict rules under the Companies Act 1993).
• Founder buyback: another shareholder (often the remaining founder) buys the shares.
• Compulsory transfer: the leaver must transfer shares to a nominated person or entity.

Each approach has pros and cons, and the “best” structure depends on funding, tax, and how your company is set up.

Acceleration On Exit (Or Change Of Control)

If the company is sold, do unvested shares vest early?

You’ll commonly see:

• Single-trigger acceleration: vesting accelerates automatically when the company is sold.
• Double-trigger acceleration: vesting accelerates only if the company is sold and the person is terminated (or materially demoted) within a set period after the sale.

Founders often like acceleration because it rewards them for building a valuable business. Buyers and investors often prefer limits, so the team remains motivated after acquisition.

What Happens If Someone Stops Contributing (But Doesn’t Resign)?

This is the “silent risk” scenario: someone remains a shareholder and technically stays involved, but contributes very little.

A well-drafted vesting arrangement can handle this by tying vesting to active service, minimum hours, or performance expectations. But it needs to be written clearly, and your governance documents need to support enforcement.

Common Mistakes With Share Vesting (And How To Avoid Them)

Share vesting is meant to reduce disputes, but if it’s drafted poorly (or not documented at all) it can actually create more conflict.

Here are some common pitfalls we see.

Issuing Shares First And “Planning To Sort Vesting Later”

It’s tempting to move fast, incorporate, and split shares on day one.

But once shares are issued, you can’t rely on an informal understanding to claw them back later. You’ll need a legally enforceable pathway, and that can be difficult if the relationship has already soured.

If you’re still working out roles and contributions, it may be safer to document vesting before (or at the same time as) issuing equity.

Using A Template That Doesn’t Match NZ Law Or Your Structure

A lot of online vesting templates are US-based and assume US concepts (or a Delaware company) that don’t translate neatly into a NZ company governed by the Companies Act 1993.

Even when a template is “NZ-friendly”, it might not match your constitution, share classes, or the way your company intends to manage exits and transfers.

It’s usually cheaper to do it properly upfront than to fix a broken structure mid-raise.

Not Aligning Vesting With IP Ownership

If someone is earning equity for building your product, brand, or systems, you need clarity on who owns the intellectual property created along the way.

That’s often handled through employment or contractor terms, confidentiality obligations, and IP assignment clauses.

If IP ownership is unclear, equity disputes can quickly become bigger disputes about who owns the underlying business assets.

Forgetting The “People” Side

Vesting isn’t just legal drafting. It’s also a relationship and expectations conversation.

Before documents are signed, it’s worth openly discussing:

• what each person is expected to contribute (time, skills, capital, networks)
• what happens if priorities change
• how decisions will be made if you disagree

Clear drafting works best when it reflects a clear conversation.

Key Takeaways

• Share vesting is a way to make sure equity stays fair over time by linking share ownership (or the right to keep shares) to service, time, or milestones.
• Vesting is most common in startups, but it also works well when you’re giving equity to key employees, advisors, or growth partners.
• The right “contract” for vesting is often a combination of documents, such as a Share Vesting Agreement, a Shareholders Agreement, and sometimes a Company Constitution to support the mechanics.
• Strong vesting arrangements clearly define the vesting schedule, good leaver/bad leaver rules, buyback or transfer mechanics, and whether vesting accelerates on a sale of the business.
• One of the biggest risks is issuing shares early without documenting vesting properly, as it can be hard to unwind equity later if relationships change.
• Because vesting terms affect ownership and control, it’s worth getting tailored legal advice rather than relying on generic templates.

If you’d like help putting share vesting in place (or reviewing what you’ve already agreed with co-founders or investors), you can reach us at 0800 002 184 or team@sprintlaw.co.nz for a free, no-obligations chat.