Call In Option Agreements In Australia: What Startups Should Know

If you’re building a startup in Australia, you’ll quickly discover there are several ways to structure future ownership and fundraising. One of the most flexible tools is a call option – a right (but not an obligation) for someone to buy shares at a later time on pre-agreed terms.

Used well, call options can help you secure a key hire, align a strategic partner, tidy up founder arrangements, or create a pathway for a future acquisition. But they’re also technical legal instruments, and getting the details wrong can be costly.

In this guide, we’ll break down what call-in option agreements are, when startups use them, how to structure them, the key legal and tax risks to watch in Australia, and how they compare with other common instruments like SAFEs, convertible notes and ESOPs.

What Is A Call Option Agreement?

A call option gives one party (the option holder) the right to buy an asset – in startups, usually shares – from another party at a set price (the exercise or “strike” price) within a certain period or once certain conditions are met.

It’s called a “call” option because the holder can “call” for the shares. Importantly, the holder can choose whether or not to exercise the option; they’re not compelled to buy.

In practice, a call option is documented in a formal agreement (often a deed). The agreement sets out the commercial terms (price, timing, conditions, milestones) and the usual legal protections (warranties, confidentiality, assignment and governing law). When you have multiple founders or plan to raise capital, it’s smart to make sure your Shareholders Agreement and Company Constitution work hand-in-hand with any option arrangements so there are no contradictions.

At a high level, a call option can help you:

• Lock in a future investment at a pre-agreed valuation or formula.
• Offer a strategic partner or prospective acquirer a clear pathway to buy shares later.
• Provide upside to a key team member without issuing shares immediately.
• Manage founder re-allocations or buy-out scenarios with pre-set rules.

When Do Startups Use Call-In Options?

Call options are versatile, which is why they pop up in different startup scenarios. Common use cases include:

• Founder or senior hire arrangements: You want to reward a senior hire with equity if they hit milestones, but prefer not to issue shares until you know it’s a fit. A call option lets them buy in on clear terms later (often alongside vesting or performance milestones).
• Strategic partnerships: A distribution partner or enterprise customer wants alignment. You can grant a call option for a small equity stake if certain revenue, integration or customer targets are met, aligning incentives without immediate dilution.
• Pre-acquisition “toe-hold”: A potential acquirer takes a small stake (e.g. 10–20%) and the right to increase that stake later if strategic milestones are achieved.
• Investment pipeline: An investor supports you now (say, as an advisor or commercial partner) and gets the right to purchase shares later at a defined valuation once traction is proven.
• Governance clean-up: The company (or a founder) has the right to call back shares from a departing founder who doesn’t meet agreed obligations, typically alongside your Shareholders Agreement and company constitution leaver provisions.

If you’re still aligning on headline commercial terms (valuation, milestones, timing), you can capture them in a simple Term Sheet before moving to a full call option document.

How Do You Structure A Call Option?

A strong call option balances flexibility with certainty. Below are the key building blocks you’ll usually see.

1) Option Scope

• What’s being bought: Typically ordinary shares. If you have different share classes, specify the exact class and rights.
• How many: Either a fixed number of shares or a formula (for example, a percentage of the fully diluted capital at exercise).
• Who can exercise: Name the holder and say whether they can assign the option to someone else (and on what terms).

2) Exercise Price (Strike Price)

• Fixed price: A dollar amount per share agreed at the time of grant (often anchored to a recent round or valuation).
• Formula-based: A price linked to revenue, EBITDA or the next round price (sometimes with a discount or cap).
• Adjustments: Cover adjustments for share splits or consolidations so the economics stay the same.

3) Exercise Period And Triggers

• Time window: A start date and expiry date (e.g. exercisable from 12 to 36 months after grant).
• Milestones: Exercisable only if agreed KPIs, product launches or revenue targets are met (make them objective and measurable).
• Change of control: Options may accelerate on an acquisition of the company, or lapse if not exercised by completion.

4) Conditions Precedent

• Approvals: Board and (if required) shareholder approvals in line with your constitution and any investor veto rights.
• Pre-emptive and class rights: Check shareholder pre-emptive rights and any class consent requirements to avoid breaches.
• Regulatory checks: Consider foreign investment approvals or industry-specific licences where relevant.

5) Option Fee And Consideration

• Option fee: Some call options include a fee to keep the option open; others use nominal consideration.
• Credit against price: If there’s a fee, say whether it’s credited against the exercise price at completion.

6) Vesting, Performance And Leaver Rules

• Vesting: You can vest exercise rights over time or on milestones to keep incentives aligned.
• Leaver outcomes: For team members, include good/bad leaver terms that affect how many options can be exercised if they depart.

7) Warranties, Confidentiality And IP

• Company warranties: Authority to issue shares, accuracy of the cap table and no conflicting rights.
• Holder warranties: The holder is acquiring for investment, is not relying solely on the company’s statements, and is allowed to invest.
• Confidentiality and IP: Protect confidential information and confirm IP ownership, especially if the holder is also an advisor or partner.

Many startups also put in place standard confidentiality tools separately (for example, an NDA) when negotiating option terms and sharing sensitive information. If you’re speaking with staff about options, your option terms should dovetail with any Employee Share Option Plan rules you already have in place.

Legal, Tax And Compliance Considerations In Australia

Call options intersect with several areas of Australian law. The big themes are approvals, disclosure rules, clear milestones and sensible tax planning.

Corporations Act Approvals And Disclosure

• Company approvals: Check your constitution and investor rights for the approvals needed to grant options and issue shares. Some companies require both board and shareholder sign-off for new equity issues or new classes.
• Disclosure exemptions: If an option is granted to an investor, make sure you fall within an equity fundraising exemption (for example, the small-scale personal offers pathway in section 708). You can read more about this in Sprintlaw’s guide to section 708 exemptions.
• Pre-emptive rights: Be clear about whether existing shareholders have a right of first refusal or pre-emptive rights over new issues or transfers, and get written waivers where needed.

Milestones, Timing And “Long Stop” Dates

• Objective milestones: Avoid vague milestones. Use measurable triggers such as signed customer contracts, revenue thresholds (as verified by accounts) or feature releases tied to version numbers.
• Funding contingencies: If exercise depends on a financing event, align your timetable with corporate approvals and investor consents to avoid last-minute roadblocks.
• Expiry: Include a clear outside date (long stop) so the option doesn’t hang around indefinitely.

Governance And Cap Table Hygiene

• Model dilution: Build a fully diluted cap table that includes options, SAFEs, convertibles and ESOP grants so everyone understands outcomes at exercise.
• Consistency: Keep your constitution, Shareholders Agreement and the option deed aligned. If you have multiple instruments granting rights to equity, make sure they don’t conflict.
• Good records: Track grant dates, vesting schedules, notices, waivers and exercise mechanics carefully. This reduces disputes later and speeds up due diligence in future rounds or exits.

Tax And Duty (Get Specialist Advice Early)

Tax outcomes depend on who holds the option, what triggers exercise, and how your documents are structured. A few general pointers:

• Employee options: Options granted to employees or contractors can fall within Australia’s employee share scheme (ESS) rules, which have specific timing and reporting requirements. Align this with your broader remuneration strategy and ESOP rules.
• Grant or exercise by investors: For non-employee holders, tax is usually considered at exercise and disposal. The company generally isn’t subject to capital gains tax when issuing new shares, but the holder’s position can vary based on their circumstances.
• Stamp duty: Duty on options over shares is limited in many cases, but some states have landholder or other rules that can apply depending on your asset profile. Always check early if your group holds significant property or land interests.

Tax is highly fact-specific. Sprintlaw doesn’t provide tax advice – it’s best to engage a tax adviser alongside your legal work so your option structure and your tax position line up from day one.

How Do Call Options Compare With SAFEs, Convertible Notes And ESOPs?

Call options are one tool in a broader toolkit. Understanding how they differ helps you choose the right instrument for the job.

Call Options vs SAFEs

A SAFE (Simple Agreement for Future Equity) brings capital into the company now in exchange for a right to receive shares later, typically at a discount or with a valuation cap when you do a priced round.

• Cash timing: SAFEs provide funds immediately. Call options generally don’t bring in cash until exercise.
• Valuation mechanics: SAFEs convert at a future round price (subject to any cap/discount). Call options usually lock a price now or set a formula, which can be useful when you don’t want valuation drift.
• Use case: SAFEs are great for quick early-stage funding. Call options are better for aligning strategic partners or setting a pathway to ownership without immediate dilution.

Call Options vs Convertible Notes

A Convertible Note is debt that converts into equity later, often with a discount and/or valuation cap, and may carry interest and a maturity date.

• Debt features: Notes can accrue interest and may require repayment if there’s no conversion event. Call options don’t create a repayment obligation – they’re simply a right to buy.
• Downside protection: Notes typically offer more downside protection to investors. A call option gives the investor a right, not a claim against the company.
• Speed vs flexibility: Notes and SAFEs can be fast funding tools. Call options offer flexibility for staged buy-ins and strategic alignment where cash now isn’t the priority.

Call Options vs ESOPs

An ESOP is a structured plan to grant options to employees with standard rules, vesting and compliance processes.

• Audience: ESOPs are aimed at employees. A bespoke call option can be granted to investors, partners or founders as well.
• Scale and consistency: ESOPs create a repeatable framework for many grants. Call options are tailored, one-off instruments for specific deals.
• Tax and reporting: ESOP options follow ESS rules for employees. Stand-alone options for non-employees are treated differently for tax and disclosure.

In reality, many startups use a mix: SAFEs or notes for speed of capital, ESOPs for staff incentives, and targeted call options for strategic partnerships or founder transitions.

Where Do Share Sales Fit?

Sometimes your call option leads to a transfer of existing shares rather than issuing new ones. That’s a different process to manage, including mechanics around pre-emptive rights and documentation for transferring shares. If you’re considering price-setting for a call option, you may also want to look at approaches to valuing shares in private companies so the commercial outcome matches expectations.

Practical Tips To Make Call Options Work

• Start with the “why”: Be clear on the goal (strategic alignment, deferred buy-in, retention). That clarity helps you set the right milestones and expiry.
• Keep triggers objective: Use hard metrics or clearly verifiable events. Ambiguity is the number one cause of disputes later.
• Align the paperwork: Ensure your option terms are consistent with your constitution, Shareholders Agreement and any other equity instruments (SAFEs, notes, ESOP).
• Think through exits: Plan what happens to the option on a change of control, an IPO, or if milestones are nearly met by the long stop date.
• Be realistic on timing: Build in time for board/shareholder approvals and any regulatory checks. Don’t set windows that are too tight to meet in practice.
• Protect sensitive information: Where you’re sharing strategy, financials or IP with an option holder or candidate, consider using a separate Non-Disclosure Agreement.

Key Takeaways

• A call option gives the holder a right (not an obligation) to buy shares later on pre-agreed terms – a powerful way to align investors, partners, acquirers or key hires without immediate dilution.
• Well-structured options define the strike price, exercise window, milestones, approvals and protections, and stay consistent with your Company Constitution and Shareholders Agreement.
• Get the legal fundamentals right: company approvals, pre-emptive rights, and any disclosure exemptions such as those under section 708 of the Corporations Act.
• Tax varies by context (especially for employee options under ESOP/ESS rules and investor options). Sprintlaw doesn’t provide tax advice – coordinate early with a tax adviser to avoid surprises.
• Compare tools before you choose: a SAFE or Convertible Note can be faster for raising capital now, while a call option is ideal for strategic alignment or staged buy-ins.
• Document and record everything carefully. Clear milestones, long stop dates and tidy cap table records will save time and reduce disputes down the track.

If you’d like a consultation on structuring or reviewing a call option for your startup, you can reach us at 1800 730 617 or team@sprintlaw.com.au for a free, no-obligations chat.