In short
A shareholders agreement sets the private contractual rules between company owners before commercial disagreements, funding pressures, or unexpected personal events arise. In Australia, relying solely on standard replaceable rules under the Corporations Act 2001 (Cth) or an off-the-shelf company constitution leaves major gaps in board control, funding calls, share transfers, and valuation methods.
To be effective, your agreement must align directly with the company constitution, share register, director loan agreements, and each owner's personal estate plan.
Who makes which decisions, and what requires special approval?
Under general Australian corporate law, company directors manage the day-to-day business under section 198A of the Corporations Act (or the equivalent clause in the constitution). However, in private proprietary companies with two or more owners, major commercial milestones should not be left to a simple board majority.
Your shareholders agreement should classify corporate actions into two tiers:
- Operational management: Everyday commercial decisions delegated to the managing director or board majority (such as hiring staff, routine supply contracts, and ordinary operational expenditure within an approved annual budget).
- Reserved matters: Major strategic decisions that strictly require unanimous consent or a super-majority (e.g. 75% or 80% of shareholder votes). Typical reserved matters include issuing new shares or options, taking on debt above an agreed financial threshold, granting security over company assets, selling key business intellectual property, appointing or removing directors, and altering dividend policies.
Clearly defining reserved matters protects minority shareholders from dilution while ensuring majority owners can operate the enterprise efficiently without administrative paralysis.
How will future business funding and cash calls be managed?
Businesses often face working capital shortfalls or require capital expenditure to scale. A properly drafted agreement prevents disputes over who contributes and on what terms:
- Order of funding: Agreements typically specify that external third-party borrowing (such as bank finance) is explored first, before requesting capital from shareholders.
- Shareholder loans: If owners inject personal capital, the agreement must specify interest rates, repayment priority, subordination, and repayment triggers relative to trading debts.
- Pro-rata cash calls: If the board approves an emergency equity injection, each shareholder must be offered the opportunity to contribute pro-rata to their existing shareholding.
- Dilution mechanics: If one shareholder cannot or chooses not to contribute to an approved cash call, the agreement must specify how their equity is diluted. Without clear pre-agreed dilution formulas, disputes over unfair dilution can quickly escalate into statutory oppression claims under section 232 of the Corporations Act.
Can a shareholder transfer their shares to an outside third party?
In private Australian companies, owners generally expect to choose their business partners. A robust shareholders agreement restricts free share transfers through tailored pre-emption mechanisms:
- Right of pre-emption (first refusal): Any shareholder wishing to sell shares must first offer them to existing shareholders on the same terms and price offered by a genuine third-party purchaser.
- Permitted transfers: Well-structured agreements permit transfers for estate-planning or tax purposes—such as transfers to family discretionary trusts, wholly owned holding entities, or spouses—provided the incoming entity executes a Deed of Accession binding them to the shareholders agreement.
- Drag-along rights: If a bona fide third-party buyer offers to purchase 100% of the company and a pre-agreed majority (e.g. 75% or 80%) accepts, the majority can compel minority shareholders to sell their shares on identical terms.
- Tag-along rights: If a majority shareholder sells their controlling stake, minority shareholders have the legal right to participate in the sale on the same pricing terms, preventing them from being trapped with an unfamiliar majority owner.
How should shares be valued and paid for if an owner exits?
Disputes over share valuation are the single most common trigger for private company litigation. A vague clause requiring shares to be sold at "fair value" almost guarantees litigation because buyers and sellers have diametrically opposed incentives.
Your agreement should establish an objective, step-by-step valuation process:
- Agreed valuation formula: Specify whether the valuation is based on net tangible assets (NTA), capitalized future maintainable earnings (EBITDA multiple), or an agreed annual valuation recorded in company minutes.
- Independent expert determination: If owners cannot agree on value within 14 days, the agreement should mandate the appointment of an independent chartered accountant nominated by the President of Chartered Accountants ANZ, acting as an expert and not an arbitrator.
- Discounts: Clarify whether minority discounts for lack of control or marketability apply. For voluntary departures, minority discounts are often retained; for involuntary exits (such as death or critical illness), agreements typically stipulate pro-rata equity value without discounts.
- Payment terms: Require outgoing payments to be structured over realistic installment periods (such as 25% on completion and the balance over 24 to 36 months) to protect company solvency and cash reserves.
What happens on death, critical incapacity or forced departure?
Unexpected personal tragedies can disrupt company governance if an deceased owner's shares pass to an inexperienced executor or surviving spouse. A shareholders agreement must work seamlessly with your business succession and estate planning documents:
- Buy-sell mechanisms: The agreement establishes automatic call options (giving continuing owners the right to buy) and put options (giving the estate the right to sell) upon death, permanent disability, or terminal illness.
- Insurance funding: Buy-sell options are frequently funded by cross-owned or trust-held life and total permanent disability (TPD) insurance policies, ensuring the estate receives immediate cash while continuing owners retain full company equity.
- Estate plan alignment: The agreement must be harmonised with each owner's Will, enduring power of attorney, and family trust deeds. For broader guidance, review our analysis on estate planning for business owners in NSW and what happens when a business owner dies.
- Bad leaver provisions: If a shareholder-employee is terminated for gross misconduct, fraud, or material contract breach, the agreement may allow continuing owners to repurchase their shares at face value or at a steep discount to market value.
How will business owners resolve a shareholder deadlock?
In 50/50 companies or businesses where equal owner factions disagree, decision-making can freeze entirely. If negotiations stall, parties face costly court-ordered winding-up proceedings on just and equitable grounds under section 461 of the Corporations Act.
To avoid court liquidation, agreements specify escalating dispute mechanisms:
- Structured negotiation: Formal written dispute notices followed by good-faith meetings between principals within 7 to 14 days.
- Commercial mediation: Referral to an independent accredited commercial mediator before any court litigation is initiated.
- Contractual exit mechanisms: If mediation fails, pre-agreed mechanisms such as Russian Roulette, Texas Shoot-out, or Dutch Auction clauses allow one party to buy out the other at an escalating valuation.
For an in-depth breakdown of practical dispute pathways and buyout methods, see our guide on shareholder exits and deadlock in private Australian companies.
Which intellectual property, confidentiality and restraint rules apply?
Shareholders often have access to confidential intellectual property, client lists, software, and trade secrets. Your agreement must protect the company's core assets:
- Intellectual property assignment: Explicit covenants confirming that all trade marks, software, customer data, and inventions created by shareholders vest exclusively in the operating company.
- Confidentiality covenants: Strict obligations prohibiting disclosure of business financial information, supplier contracts, or pricing models both during and after shareholding.
- Restraint of trade: Reasonable non-compete and non-solicitation restrictions preventing departing shareholders from poaching key staff, targeting clients, or operating a competing enterprise within a defined geographic territory for a reasonable period.
What essential documents should you assemble before drafting?
Before instructing commercial solicitors to prepare or update your agreement, assemble the following corporate records:
- Current company constitution and ASIC certificate of registration;
- Up-to-date share register and capitalization table showing all share classes;
- Existing shareholder loan agreements, director guarantees, and bank facility letters;
- Employment, service, or executive agreements for founder-shareholders;
- Current buy-sell insurance policies and policy ownership schedules;
- Each shareholder's personal estate planning documents and trust deeds.
Our commercial team provides full guidance across our shareholder agreements services, business formation and corporate structuring, and commercial contracts advice.
Are you establishing or reviewing a shareholders agreement?
Biz Lawyers & Advisory assists private company founders, corporate directors, and family business owners in drafting tailored shareholders agreements that protect equity, clarify governance, and prevent costly shareholder litigation.
Contact Biz Lawyers & Advisory or call 1800 893 836 to speak with our commercial law team.
This legal guide provides general information only and does not constitute specific legal, corporate governance, or taxation advice. Shareholder relationships depend entirely on individual company constitutions, share structures, and commercial agreements.
Primary sources
Law and regulatory guidance checked 3 September 2026.
