If you’re building a startup or small business with more than one owner, a shareholder agreement can be one of the most valuable “behind-the-scenes” documents you put in place.
It’s not the most exciting part of launching a business, but it’s often the difference between a company that can handle growth (and tough conversations) and one that gets stuck when something goes wrong.
This guide breaks down what a shareholder agreement in Australia typically covers, when it matters most, what clauses to look for, and how to set it up in a practical way - without drowning you in legal jargon.
What Is A Shareholder Agreement In Australia (And Why Does It Matter)?
A shareholder agreement (sometimes called a “shareholders agreement”) is a contract between the shareholders of a company. It sets out how the company will be owned, managed, and governed - and what happens if circumstances change.
In practical terms, it’s the document that answers questions like:
- Who owns what percentage of the company?
- Who makes which decisions, and how are votes counted?
- What happens if a shareholder wants to leave (or needs to be removed)?
- Can someone sell shares to an outsider?
- What happens if the founders disagree?
- How do we bring in investors without losing control?
In Australia, your company will also be governed by:
- the Corporations Act 2001 (Cth)
- your company’s constitution (if you have one)
- your company’s internal governance records and ASIC filings (including details like shareholdings and director appointments)
A shareholder agreement doesn’t replace those rules - it works alongside them. The big advantage is that it can be tailored to your deal and your risk profile, rather than relying on default rules that may not fit a startup or small business.
If you’re not sure how different roles fit together, it can help to clarify the distinction between director vs shareholder early, because your rights and responsibilities can differ depending on which “hat” you’re wearing.
Shareholder Agreement vs Company Constitution: Do You Need Both?
You’ll often hear “constitution” and “shareholder agreement” mentioned together, but they’re not the same thing.
- Company constitution: the company’s internal rulebook, usually more general and designed to apply consistently over time.
- Shareholder agreement: a negotiated contract between shareholders that can get more specific about control, exits, funding, and disputes.
Many growing businesses use both, because they solve slightly different problems. For example, a Company Constitution is commonly used to set baseline governance rules, while the shareholder agreement deals with the commercial “what ifs” that founders and investors worry about.
When Should A Startup Or Small Business Put A Shareholder Agreement In Place?
The best time to put a shareholder agreement in place is before you have your first major disagreement.
Realistically, that usually means:
- right after incorporating (when ownership is being set up)
- when a co-founder joins (especially if they’re earning equity over time)
- before bringing in an investor (even friends-and-family funding)
- when you start hiring key staff and want clear confidentiality and IP ownership expectations
- when you’re scaling and decision-making is becoming more complex
Many business owners delay it because things feel “fine” in the early days. But early is exactly when it’s easiest to negotiate - your interests are aligned, and the cost of changing things later is much higher.
Common Triggers That Make People Wish They Had One
We often see shareholders agreements become urgent when something changes, such as:
- a shareholder stops contributing but still holds equity
- someone wants to sell shares to a third party
- the business needs capital and existing owners disagree on dilution
- founders break down personally and can’t make decisions together
- one shareholder is taking on disproportionate risk (e.g. personal guarantees) and wants protection
Even if you’re not facing these issues today, a well-drafted shareholder agreement Australia startups use will usually plan for them.
What Should A Shareholder Agreement Australia Startups Use Include?
There’s no single “one size fits all” shareholder agreement - what you need depends on your size, industry, funding plans, and how you and your co-owners actually work together.
That said, there are several clauses that are common in a practical, business-focused shareholders agreement Australia founders rely on.
1) Shareholdings And Share Classes
Your agreement should confirm:
- who owns what (including exact percentages)
- whether there are different classes of shares (e.g. investor shares with special rights)
- whether shares are fully paid or subject to future conditions
This is also where you can clarify whether any equity is subject to vesting (common for co-founders joining early but not committing full-time from day one).
2) Decision-Making And Reserved Matters
In many small companies, day-to-day decisions are easy. But what about big decisions?
A shareholder agreement usually lists “reserved matters” - decisions that require a higher threshold than ordinary decisions. For example:
- issuing new shares
- taking on significant debt
- changing the business model materially
- hiring or firing key executives
- selling major assets
This helps you avoid situations where one shareholder can force a major change, or where the company becomes paralysed because nobody knows what approval is required.
3) Funding: Who Pays, When, And What Happens If They Don’t?
One of the most common stress points for startups is money. If your company needs cash, your shareholder agreement can set out:
- whether shareholders must contribute additional funds (and if so, how much and on what notice)
- what happens if someone can’t or won’t contribute (e.g. dilution, loans, or default consequences)
- whether funding is by equity, shareholder loans, or external investment
By documenting the rules now, you can reduce the risk of a dispute later when cashflow is tight and emotions are high.
4) Dividends And Profit Distribution
Not every startup pays dividends, but many small businesses do. Your agreement can clarify:
- whether the goal is reinvestment vs profit distribution
- how dividend decisions are made
- whether some shareholders can receive priority distributions (usually more relevant with different share classes)
This is especially important if one shareholder expects an income stream while others want to grow the business aggressively.
5) Share Transfers: Keeping Control Of Who Comes In
Without clear transfer rules, you can end up “in business” with someone you never chose - for example, if a shareholder sells to an outsider or shares transfer due to personal circumstances.
Most shareholder agreements include restrictions such as:
- pre-emptive rights: existing shareholders get first right to buy shares before they’re sold externally
- board/shareholder consent: sales require approval
- valuation rules: how the shares are priced
Transfers within families can also raise practical questions around control and succession. If this is relevant to your ownership plans, it’s worth considering what the agreement should say about transferring shares.
6) Good Leaver / Bad Leaver Clauses (Founder Exits)
If a founder leaves, the business needs a clear pathway forward. “Good leaver / bad leaver” clauses are designed to handle departures fairly while protecting the company.
They usually deal with:
- what happens if someone resigns, is terminated, becomes ill, or breaches obligations
- whether their shares must be sold back (and at what price)
- whether unvested shares are forfeited
These clauses matter because they protect the people who stay and keep building - while still giving a fair outcome in genuine circumstances.
7) Confidentiality, Intellectual Property, And Restraints
Startups often move quickly, share ideas openly, and build valuable IP (like software, branding, processes, and customer lists).
A shareholder agreement can reinforce obligations around:
- confidentiality: protecting sensitive business information
- IP ownership: ensuring what’s created for the business belongs to the business
- restraints: reducing the risk of someone leaving and immediately competing using inside knowledge
These clauses need to be drafted carefully - especially restraints - because enforceability can depend on how reasonable and tailored they are.
8) Dispute Resolution (So You’re Not Stuck In Deadlock)
Disputes are normal in business. What matters is whether you can resolve them without destroying the company.
A good shareholder agreement commonly includes:
- a step-by-step negotiation process
- mediation (and sometimes expert determination)
- deadlock mechanisms (for 50/50 ownership situations)
Deadlock clauses are especially important if you have two equal shareholders. Without a circuit-breaker, the company can’t make decisions - which can be fatal when you need to move fast.
How Does A Shareholder Agreement Work When You Raise Money Or Sell Shares?
Even if you’re not raising investment today, it’s smart to assume you might in the future - whether that’s a formal seed round, a strategic investor, or a partial buyout.
This is where a shareholder agreement becomes a “growth document”, not just a “risk document”. It helps you raise money without losing the business to uncertainty.
Bringing In Investors (Without Losing Control Overnight)
Investors will usually want clarity on:
- what rights they get (e.g. information rights, voting rights)
- how further funding rounds work
- whether founders can sell shares and exit early
- how major decisions are approved
If you have a solid shareholder agreement, you’re often in a better position to negotiate, because you’re not building the plane mid-flight.
Share Sales, Buyouts, And Exit Scenarios
If a shareholder is selling shares (either to another shareholder or to an external buyer), you’ll typically want the legal documents to align. In many cases, the actual sale process is documented in a separate agreement that works alongside the shareholders agreement.
For example, a Share Sale Agreement can document the commercial terms of a specific sale (price, timing, warranties), while the shareholder agreement sets out the rules about whether the sale is allowed and what approvals are needed.
Drag-Along And Tag-Along Rights
These are common clauses in shareholder agreements for growing companies:
- Tag-along rights: if majority shareholders sell, minority shareholders can “tag along” and sell on the same terms (protects minority holders).
- Drag-along rights: if a qualifying majority agrees to sell the company, minority shareholders can be “dragged along” to allow the sale to proceed (protects the deal).
These clauses can make your company more attractive to buyers and investors, because they reduce the risk of a sale being blocked by a small minority.
How Do You Put A Shareholders Agreement In Place Without Slowing The Business Down?
A shareholder agreement should support your growth - not become a never-ending project that delays your launch.
Here’s a practical approach we often recommend for startups and small businesses in Australia.
Step 1: Get Clear On The Commercial Deal First
Before drafting, make sure you can answer the basics:
- Who are the shareholders, and what percentage does each hold?
- Who is doing what work (and who is contributing cash, assets, or IP)?
- What are the long-term goals (lifestyle business, high-growth startup, eventual sale)?
- What happens if someone wants out?
If you can align on these points, the legal drafting becomes much easier.
Step 2: Decide How You Want Decisions To Be Made
This is where many founder disputes begin: not because someone is acting “wrong”, but because expectations were never discussed.
Talk through things like:
- Do you want certain founders to have veto rights?
- Do you want unanimous consent for big moves (or a supermajority)?
- How do you break deadlock if you’re 50/50?
It’s better to have these conversations while you’re on good terms - not in a crisis.
Step 3: Align Your Other Documents (And Your Day-To-Day Operations)
Your shareholder agreement shouldn’t exist in isolation. It should be consistent with documents like:
- your constitution
- employment or contractor arrangements (so IP and confidentiality are protected)
- privacy compliance if you collect personal information online
For example, if your business collects customer data through a website, a Privacy Policy is often part of your broader risk management - and it’s best if your internal governance documents support consistent, compliant practices.
If you have staff, it’s also worth making sure your Employment Contract and internal policies line up with who owns what, who can access what information, and how confidential information is handled.
Step 4: Keep It Clear, Not Overcomplicated
A good shareholder agreement is detailed where it needs to be - and simple everywhere else.
Overly complex documents can backfire because:
- shareholders don’t follow them day-to-day
- the process for approvals becomes unworkable
- you spend too long negotiating unlikely scenarios
It’s usually better to cover the high-risk, high-impact events well (funding, exits, decision-making, disputes) than to add pages of clauses that nobody will use.
Step 5: Get It Drafted (Or Reviewed) With Your Growth Plan In Mind
Founders and small business owners often use templates online because they want to move quickly. The risk is that templates can:
- conflict with your constitution or actual ownership structure
- miss key protections (like deadlock, vesting, or transfer restrictions)
- include clauses that don’t make sense for Australian law or your state-based practices
Getting the agreement drafted or reviewed properly can save you significant time and cost later - especially if you’re planning to raise capital, bring in key hires, or build a valuable brand.
When you’re ready to formalise things, a tailored Shareholders Agreement helps make sure the legal detail matches the deal you think you’ve made.
Key Takeaways
- A shareholder agreement Australia businesses use is a practical tool to set clear rules for ownership, decision-making, funding, exits, and disputes.
- It’s easiest to put a shareholder agreement in place early - ideally at incorporation, when bringing on a co-founder, or before raising money.
- Strong shareholder agreements usually cover shareholdings, reserved matters, funding obligations, share transfer restrictions, founder exits, confidentiality/IP protection, and dispute resolution.
- If you plan to raise investment or sell shares, clauses like tag/drag rights and clear share sale processes can help deals run smoothly.
- Your shareholder agreement should align with your constitution and other key documents (like employment and privacy documents) so your business is protected end-to-end.
If you’d like help putting a shareholder agreement in place for your startup or small business, you can reach us at 1800 730 617 or team@sprintlaw.com.au for a free, no-obligations chat.
