Co-founders don’t usually start a business expecting to “break up”. But as your company grows (or even while it’s still in the early stages), people’s priorities can change.
Maybe one co-founder wants to move overseas, take a new job, step back for family reasons, or they’re simply not aligned with where the business is going anymore.
And sometimes, it’s not that tidy. There might be conflict, performance issues, or a complete breakdown in trust.
Either way, a co-founder exit isn’t just an emotional milestone - it’s a legal and commercial risk point for your business. This update reflects current, practical expectations around shareholder arrangements, IP ownership, privacy/data access, and company governance that NZ founders are dealing with right now.
Here’s what you need to know (and why getting a lawyer involved early can save you a lot of time, money, and stress).
Why A Co-founder Exit Gets Complicated Fast
When a co-founder leaves, you’re not just losing a person. You’re dealing with a web of rights and obligations that often sit quietly in the background until something changes.
Common questions that come up immediately include:
- Do they still own shares? If yes, how many - and what rights come with them?
- Can they sell their shares to someone else? Or do the remaining founders get first dibs?
- Who owns the IP they created? Think code, designs, brand assets, customer lists, internal documents.
- Do they still have access to company data? This is a big one if they had admin access to systems, CRMs, or bank accounts.
- Will they start a competing business? If so, what restraints (if any) apply?
- What happens to company debts, director duties, and guarantees?
Even “friendly” exits can become messy if the paperwork isn’t clear - or if it was never properly set up in the first place.
That’s why a co-founder exit is one of those moments where having a lawyer on your side isn’t a luxury. It’s risk management.
The Real Risk: You Think You Have An Agreement, But You Don’t
Many founders rely on informal understandings like:
- “We agreed they’d keep 10%.”
- “They said they’d sign something later.”
- “It’s fine - we’re mates.”
The issue is that when money, control, or reputation is at stake, memories differ.
A lawyer helps you convert the “we’re on the same page” conversations into documents that are enforceable, practical, and actually protect your company.
What Your Lawyer Will Look At First (And Why)
When you engage a lawyer for a co-founder departure, we’ll usually start by mapping the legal reality of your business as it stands today.
This normally includes reviewing:
- Your company’s shareholding and current Companies Office records
- Any Shareholders Agreement (or the absence of one)
- Your company constitution (if you have one), including any share transfer rules
- Employment arrangements (if the departing co-founder is also an employee)
- Contractor arrangements (if they were engaged as a contractor)
- IP ownership and assignment terms
- Any personal guarantees or security interests
From there, your lawyer can help you work out what options you actually have - and what steps you need to take to get the exit done cleanly.
Shareholding: Who Owns What, And What Rights Attach?
If the departing co-founder owns shares, they don’t automatically lose them just because they stop working in the business.
Share ownership comes with legal rights that can matter a lot, including (depending on what’s been agreed):
- voting rights on major company decisions
- rights to dividends (if declared)
- rights to information about the company
- influence over future fundraising or sale decisions
If you have a clear Shareholders Agreement and Company Constitution setup, you’ll usually have a framework for how exits work.
If you don’t, your lawyer will help you manage the exit through a negotiated approach that still fits within NZ company law and best practice governance.
Directorships: Stepping Down Needs To Be Properly Documented
A co-founder might also be a director. A director resignation and a share transfer are separate steps - and mixing them up is a common mistake.
Directors have duties under the Companies Act (including acting in the best interests of the company). If someone is leaving, it’s important to record:
- when they resigned as director
- what information and property they must return
- what ongoing confidentiality obligations continue
- what authority/access should be removed immediately (banking, admin accounts, etc.)
Depending on your situation, you may also need company resolutions, updates to company registers, and other governance housekeeping.
How Shares Get Transferred (And Where Things Often Go Wrong)
If the departing co-founder is selling or transferring their shares, you’ll want the process to be:
- legally valid (so the shareholding is actually changed)
- commercially fair (so neither side feels ripped off)
- clear on tax and payment mechanics (so there are no nasty surprises)
- final (so they can’t come back later with claims)
In practice, share transfers can go wrong when:
- the price is unclear or disputed
- there’s no agreed valuation method
- instalment payments are agreed informally (without protection for either side)
- the departing co-founder still controls key assets or logins
- the company doesn’t properly update internal registers or Companies Office records
To transfer shares properly, you’ll typically need documentation to support the transaction and avoid future disputes - and your lawyer can make sure the paperwork matches what you actually agreed.
This usually ties in closely with How To Transfer Shares requirements, including share transfer forms, board approvals (if needed), and register updates.
Do You Need A Buyout, Or Can They Keep Their Shares?
Not every exit requires a buyout.
Sometimes, a co-founder stops working in the business but stays on the cap table as a passive shareholder. That can work - but it needs boundaries.
Your lawyer can help you think through:
- Whether they should keep voting rights, or move to a different class of shares (if applicable)
- Whether they will remain entitled to information and updates
- What happens if you raise capital, sell the company, or bring in new founders
- How disagreements are resolved if they’re no longer actively involved
This is where founders often realise they should’ve set up vesting, leaver clauses, or dispute mechanisms earlier - but it’s still possible to negotiate a sensible structure now.
IP, Confidentiality, And Access: The “Invisible” Assets You Must Protect
When founders think about exits, they usually focus on shares and money.
But often, the bigger risk is your intellectual property and confidential information.
In plain terms: if a co-founder helped build the business, they may have created valuable IP - and they almost certainly had access to sensitive information.
Who Owns The IP A Co-founder Created?
In NZ, IP ownership can depend on the relationship and the documents you have in place.
For example:
- If they were an employee, their employment agreement may say IP created “in the course of employment” belongs to the employer (but the exact drafting matters).
- If they were a contractor, IP usually does not automatically transfer unless your contract includes an IP assignment clause.
- If they created assets before the company existed, ownership can be especially unclear unless there was a proper assignment into the company.
This is one reason co-founder exits often trigger “wait… who actually owns the code?” conversations.
A lawyer can help you identify what IP needs to be assigned, confirm who owns what, and document the transfer so the business can keep operating confidently.
Confidentiality And Restraints: What Can They Take And What Can They Do Next?
Most businesses rely on information that isn’t publicly visible, including:
- pricing and margins
- supplier terms
- customer lists and lead pipelines
- product roadmaps
- marketing strategy and ad account performance
- internal SOPs and templates
Even if your co-founder leaves on good terms, you should still document confidentiality obligations and return of property. If things are tense, this becomes essential.
You’ll often deal with this through a tailored deed or exit agreement that sets out:
- what information is confidential
- what must be returned or deleted
- what continuing obligations apply after exit
- whether any restraint of trade applies, and if so, how it’s drafted to be enforceable
If you need an enforceable “clean break”, formalising the exit using a Deed of Settlement can be a practical option in the right circumstances.
Data And Privacy: Don’t Overlook The Privacy Act 2020
Modern businesses run on data. That might include customer data, employee records, mailing lists, health information (in some sectors), or even user analytics.
Under the Privacy Act 2020, you need to take reasonable steps to protect personal information from unauthorised access, use, or disclosure.
If a co-founder is leaving and they still have access to systems (Google Workspace, Xero, CRMs, social media accounts, databases), it’s not just inconvenient - it can create a privacy and security risk.
Part of a well-managed exit is implementing an access removal plan and making sure your external-facing documents reflect how you handle information, including a clear Privacy Policy if your business collects personal information online.
Employment Vs Shareholding: Why These Are Two Separate Conversations
A lot of co-founders wear multiple hats. They might be:
- a shareholder
- a director
- an employee (with a salary)
- a contractor (paid via invoices)
Each “hat” has different legal rules, and they don’t automatically end at the same time.
If They’re An Employee, You Still Need A Proper Exit Process
If the departing co-founder is employed by the company, you should treat their exit as an employment matter as well.
That might involve:
- resignation and notice periods
- final pay calculations (including holiday pay and other entitlements)
- return of company property
- post-employment obligations (confidentiality, restraints where appropriate)
Even if they’re a shareholder, employment law expectations still apply. If the relationship ends badly and there’s an allegation of unfair process, it can escalate quickly.
Having a clear Employment Contract (and following it) makes these transitions far more predictable.
If They’re A Contractor, Check Your Contractor Agreement Carefully
If you’ve engaged your co-founder as a contractor, different risks apply - especially around IP ownership, confidentiality, and deliverables.
Contracts for contractors should be explicit about:
- who owns IP created during the engagement
- how and when work product is delivered
- what happens on termination
- confidentiality and data handling
A well-drafted contractor arrangement can make a co-founder exit much cleaner if they were contributing work in that capacity.
Key Documents And Legal Steps That Help You Exit Cleanly
There’s no one-size-fits-all “co-founder exit pack”, because every business has a different structure and history.
But in most NZ co-founder exits, a lawyer will help you plan and document a combination of the following.
1) A Clear Agreement On The Exit Terms
This is the “commercial deal” part. It may cover:
- exit date and transition period
- role handover and introductions (suppliers, clients, tech)
- payment terms (including any outstanding reimbursements)
- whether the departing co-founder will provide ongoing support or consulting
Putting the agreed terms in writing reduces the chance of misunderstandings later.
2) Share Transfer Or Buyback Documentation
If shares are being transferred, you’ll likely need:
- a share transfer instrument
- any board or shareholder approvals required by your constitution/shareholders agreement
- updates to the share register and Companies Office records
- tax and payment mechanics documented clearly
If the company is buying back shares, there are additional legal rules and procedural requirements, so it’s worth getting advice early.
3) IP Assignment And Asset Return Clauses
This is where you lock down what the company owns, and what must be returned. For example:
- source code repositories and credentials
- design files and brand assets
- domain names and admin accounts
- customer lists, databases, and documentation
- hardware, devices, and physical documents
If the business is valuable (or you plan to raise investment), cleaning up IP ownership is often non-negotiable. Investors and buyers will expect it.
4) Confidentiality, Non-disparagement, And (Sometimes) Restraints
This is about protecting your business reputation and relationships after the co-founder leaves.
Restraints of trade need to be drafted carefully to be enforceable. Too broad, and they might not hold up. Too narrow, and they don’t protect you.
A lawyer can help balance what’s fair to the departing co-founder with what your company genuinely needs to protect.
5) Governance Updates And “Housekeeping”
These steps aren’t glamorous, but they matter.
- Update director and shareholder records
- Change banking authorities and payment approvals
- Rotate passwords and remove admin access
- Update signing authorities for contracts
- Notify key third parties if needed (accountants, major suppliers, platform partners)
This is often the point where founders realise how many systems one person had access to - and why an exit plan should include operational steps as well as legal ones.
Key Takeaways
- A co-founder exit is rarely just a personal decision - it triggers shareholding, directorship, employment/contractor, IP, and confidentiality issues that can quickly become business-critical.
- Shares don’t automatically disappear when someone leaves, so you need a clear process for valuation, transfer restrictions, and updating company records.
- IP ownership is one of the biggest hidden risks, especially if your co-founder created core assets like code, branding, content, or customer databases without clear assignment terms.
- Data access and system permissions need to be addressed immediately to reduce security and Privacy Act 2020 risks when someone exits.
- A lawyer can help you document the exit properly (often via a deed or tailored agreement), so the business can move forward without lingering disputes or uncertainty.
If you’d like help managing a co-founder exit or putting the right documents in place so your business is protected from day one, you can reach us at 0800 002 184 or team@sprintlaw.co.nz for a free, no-obligations chat.
