Call vs Put Options Explained: What Small Businesses Need To Know About Shareholders Agreements

Thinking about how to protect your position if a co-founder leaves, an investor wants out, or ownership needs to change hands? Call and put options can give you a clear, pre-agreed pathway to buy or sell shares when certain events occur - and they’re often built into a Shareholders Agreement to keep everyone on the same page.

In this guide, we’ll break down call vs put options in plain English, show how they work in real life, and highlight the Australian law nuances that matter (including company buy-back rules and financial assistance restrictions). You’ll also find practical drafting tips, the key documents to consider, and common traps to avoid - so you can set up a Shareholders Agreement that supports your growth and reduces disputes.

Let’s get you confident about how to use these tools in Australia and how to tailor them to your business.

What Are Call And Put Options?

Call and put options are contractual rights you can build into your Shareholders Agreement so that, if a specific event happens, one party can require a share transfer at a price and process you’ve agreed in advance.

• Call option: The right (not the obligation) for a person - often existing shareholders or the company - to require another shareholder to sell some or all of their shares.
• Put option: The right (not the obligation) for a shareholder to require someone else - commonly other shareholders or the company - to buy their shares.

Both mechanisms are about certainty. They help you avoid being “stuck” in a deadlock, prevent shares ending up with a competitor, and give investors or founders a clear exit path. When combined with rules about how you allocate shares and who can buy them next, they form a strong foundation for managing ownership over time.

How Do Call And Put Options Work In Practice?

Options only work if they’re clearly defined. The core building blocks are the trigger, the price, and the process.

Typical Triggers

• Founder or key employee leaves (resigns, is terminated, or ceases to be actively involved)
• Material breach of the Shareholders Agreement or company policies
• Incapacity, bankruptcy, or death of a shareholder
• Change of control of a shareholder entity, or a competing business risk
• Time-based milestones (e.g. an investor can exit after three years)

For example, suppose your co-founder exits to join a competitor. A call option can allow the remaining shareholders to buy their shares to keep control within the team. On the flip side, a minority investor might negotiate a put option that lets them sell their shares back if there’s no liquidity event after a set period.

Price (Valuation) Methods

• Fixed price per share (simple, but can date quickly)
• Formula-based (e.g. a multiple of EBITDA or revenue)
• Independent valuation (using a jointly appointed valuer)
• Good leaver/bad leaver pricing (favourable vs discounted pricing based on circumstances)

Whichever approach you choose, write it down precisely. Ambiguous pricing is one of the fastest ways for options to become unenforceable or disputed. If you want more detail on methods, see this overview on valuing shares in a private company.

Process And Timeframes

• How and when an option can be exercised (written notice, form, and delivery method)
• Completion timeline (e.g. within 30 or 60 days)
• Payment terms (upfront vs instalments, security over shares if payment is deferred)
• Default consequences (interest, forfeiture, or other remedies if a party doesn’t complete)

Don’t forget the practicalities after completion - you’ll usually need documents for transferring shares and to update company registers and ASIC records as part of closing the transaction.

When Should You Use A Call Option vs A Put Option?

Both tools are useful, but they serve different strategic goals. The choice often reflects bargaining power and risk allocation in your deal.

Call Options: Best When You Need Control And Continuity

Call options are common when founders or the company want a clear mechanism to keep ownership stable. They can help you:

• Buy out an exiting or non-performing shareholder
• Prevent a competitor from gaining influence
• Consolidate shares during succession planning

They’re especially effective alongside pre-emption or approval provisions that restrict who shares can be sold to, and a strong Company Constitution that complements your Shareholders Agreement.

Put Options: Best When Investors Want A Defined Exit

Put options give investors or minority shareholders a fair exit path if no voluntary buyer appears. They’re useful when:

• A future liquidity event (like a trade sale) is uncertain
• Investors need timing certainty for their return profile
• You want to avoid shareholders being trapped in a deadlock

In some deals, both options exist. For instance, a “double-barrel” approach might grant founders a call on bad leaver events and give investors a put after a time-based milestone. There’s no one-size-fits-all - tailor the mix to your funding model, cash flow, and risk tolerance.

How To Draft Call And Put Options In A Shareholders Agreement

Clear drafting is everything. Well-written clauses reduce misunderstandings, speed up transactions, and stand up better if challenged. Consider addressing the points below.

1) Scope: Who Holds The Option And Over Which Shares?

• Is the option held by the company, a particular shareholder, or all non-defaulting shareholders pro rata?
• Does it apply to all shares or a defined class or tranche (e.g. unvested vs vested)?

2) Triggers: What Events Switch The Option On?

• Be precise about resignations, terminations, breaches, and change-of-control scenarios
• Set time-based windows (e.g. can be exercised within 30 days after a trigger)

3) Price: Set A Robust Method

• Choose a fixed number, formula, or independent valuation mechanism
• Deal with adjustments (e.g. debt, cash, working capital, or performance hurdles)
• Consider “good leaver” and “bad leaver” pricing to align incentives

4) Process: Make Completion Smooth

• Notice requirements, completion documents, and payment terms
• Security arrangements (e.g. share mortgage) if paying in instalments
• Fallback rules if parties can’t agree on a valuer or timetable

5) Alignment With Other Documents

• Ensure your options don’t conflict with the Shareholders Agreement as a whole
• Check consistency with the Company Constitution (e.g. pre-emption on transfers, director powers to refuse registration)
• Make sure the process dovetails with any off‑market share transfer steps you’ll need to follow

If you’ll be executing documents as a company, it helps to structure signing and completion around standard processes under section 127 of the Corporations Act.

Australian Law And Compliance Issues To Watch

Options are powerful, but some Australian-specific rules can affect how you implement them. Build these into your planning so the clause you negotiate is one you can actually use.

Company Buy-Backs (Corporations Act Chapter 2J)

Sometimes an option points to the company itself buying the shares. Company buy-backs are regulated under Chapter 2J of the Corporations Act 2001 (Cth). In practice, this means you need to ensure the buy-back structure fits within the permitted types (e.g. equal access, selective buy-back), follows the procedural requirements (board approvals, notices, filings), and does not materially prejudice the company’s ability to pay its creditors.

Selective buy-backs often require shareholder approval and strict documentation. If you anticipate a company buy-back as the “buyer” under an option, plan timing and compliance upfront.

Financial Assistance Rules

Where a company funds or assists the acquisition of its own shares (for example, by providing a loan or guarantee to help a purchaser pay the price under an option), financial assistance restrictions can apply. Unless an exemption is available, the company may need shareholder approval and to follow a prescribed process. This is another reason it’s important to map the funding pathway for any option scenario - not just the headline price.

Pre-Emption And Transfer Restrictions

Your Company Constitution or Shareholders Agreement may include pre-emption rights or director discretions to refuse transfers. Make sure your option clauses either override, comply with, or work hand-in-glove with those rules. Otherwise, you could have a valid option on paper but a blocked transfer in practice.

Solvency And Capital Maintenance

Regardless of what an option says, the company must remain solvent. If the option requires staged payments or a buy-back funded from company resources, check that cash flow, capital maintenance rules, and creditor interests are protected to avoid breaching directors’ duties or the Corporations Act.

Control And Related Party Dynamics

Exercise of options can shift voting power. Consider how a transfer might affect control thresholds, board composition, and quorum rules. It’s wise to think about control under the Corporations Act when drafting your triggers and caps, especially if investors have veto rights tied to ownership percentages.

Tax, Duty And Accounting

Option exercises can have real tax consequences (for both the seller and the buyer), including capital gains tax, potential stamp duty in some jurisdictions, and accounting impacts if you’re buying back shares or renominating equity as part of employee schemes. Pricing formulas can also drive differing outcomes. It’s a good idea to speak with your accountant or tax adviser before locking in your option mechanics.

If your endgame is a broader exit, you may also want to consider whether the deal points to a share sale vs asset sale in future and align your option logic to that pathway.

Key Documents And Common Mistakes

Options don’t live in a vacuum. They should be supported by the right documents and clean processes so you can rely on them when they matter most.

Documents To Consider

• Shareholders Agreement: The backbone document that sets decision-making rules, transfer restrictions, and the detailed call/put option mechanics. A tailored Shareholders Agreement keeps your ownership stable.
• Company Constitution: Works alongside your Shareholders Agreement to manage pre-emption, director discretions, classes of shares, and meeting rules. Update your Company Constitution so it’s consistent with your options.
• Share Transfer Documents: When options are exercised, you’ll need the right forms and processes for transferring shares and updating registers.
• Valuation Protocols: If you use an independent valuation, include a process for appointing a valuer and resolving disputes. You can draw on approaches outlined in share valuation methods.
• Off-Market Transfer Steps: Most private company transfers are off-market, so make sure your completion checklist suits off‑market share transfers and ASIC updates.
• Execution Block: Ensure your deeds and notices can be executed efficiently, often by aligning with section 127 execution where appropriate.

Common Mistakes To Avoid

• Vague triggers or pricing: If you don’t define what activates the option, how the price is set, and how disputes are resolved, you invite unenforceability and conflict.
• Forgetting constitution and pre-emption rules: Option clauses should either expressly override or integrate with transfer restrictions to avoid roadblocks.
• Ignoring Chapter 2J and financial assistance: Company buy-backs and funding support need Corporations Act compliance. Plan approvals and timing early.
• No cash flow plan: If the buyer can’t actually fund the purchase when the trigger hits, the option is a headache instead of a solution. Consider instalments and security where appropriate.
• Poor record-keeping: After completion, update the member register, issue/transfer certificates, lodge any ASIC changes, and keep a clean paper trail.
• Tax as an afterthought: Pricing formulas and buyer identity (company vs founder) affect tax. Get input from your accountant before finalising terms.

A quick extra tip: if you’re using good leaver/bad leaver mechanics, define conduct and thresholds with examples so there’s no ambiguity about which category applies.

Key Takeaways

• Call options let you require a shareholder to sell; put options let a shareholder require someone to buy. Both provide certainty when ownership needs to change.
• Strong option clauses spell out the trigger, price method, and process - and should align with your Shareholders Agreement, Company Constitution, and transfer rules.
• In Australia, company buy-backs must comply with Corporations Act Chapter 2J and financial assistance restrictions may apply when funding an acquisition of shares.
• Think ahead about control thresholds, board composition, and cash flow so you can actually complete a transfer when the trigger happens.
• Support your options with the right documents: a tailored Shareholders Agreement, transfer forms for share transfers, and a practical valuation and completion process shaped for off‑market transfers.
• Before finalising pricing or selecting the “buyer” for an option, speak with your accountant about tax, duty and accounting impacts - it can change the best approach.

If you’d like a consultation on setting up your Shareholders Agreement or tailoring call vs put options for your small business, you can reach us at 1800 730 617 or team@sprintlaw.com.au for a free, no-obligations chat.