How Convertible Notes Work For Australian Startups And Early Investors

If you’re building a startup in Australia, raising money can feel like a balancing act.

On one hand, you want the capital to hire, build, ship and grow. On the other hand, you may not be ready (or willing) to lock in a company valuation right now, especially if you’re still proving product-market fit.

This is where convertible notes often come in. They’re a common tool for early-stage funding because they can be faster to negotiate than an equity round, while still giving investors a pathway to ownership later.

In this guide, we’ll walk through how a convertible note works in a practical, plain-English way, with a focus on what Australian founders and early investors should look out for before signing.

What Is A Convertible Note (And Why Do Startups Use Them)?

A convertible note is usually a loan that can convert into equity (shares) in your company later, typically when your startup raises a priced equity round (like a Seed or Series A) or when another trigger event happens.

In simple terms, it’s a way for an investor to give your company money now, with the intention of receiving shares later instead of being repaid in cash (although repayment is often technically possible depending on the terms).

Convertible notes are popular with startups because they can:

• Delay valuation discussions until you have more traction and data
• Move faster than many equity rounds (fewer documents, simpler negotiation in many cases)
• Bridge a gap between rounds (for example, if you’re close to a priced round but need working capital now)

They can also be attractive to investors because they can provide:

• Downside protection (it starts as debt)
• Upside potential (it converts into equity if the startup grows)
• Economic incentives like a discount or valuation cap (more on this below)

That said, a convertible note isn’t “standard” in the sense that all terms are the same. The commercial details can vary a lot, and that’s where many risks (and disputes) arise.

How Does A Convertible Note Work In Practice?

When founders and investors ask how does a convertible note work, they’re usually trying to understand the mechanics: what happens on day one, what happens later, and what the investor actually receives.

Here’s the typical lifecycle.

Step 1: The Investor Lends Money To The Company

Your company issues a convertible note to the investor, and the investor transfers funds (for example, $50,000 or $250,000) to the company.

The note usually sets out:

• the principal amount (how much was invested)
• the interest rate (if interest accrues)
• the maturity date (when the note is due)
• the conversion triggers (when and how it converts to shares)

Even though it’s often spoken about like “pre-equity”, it is commonly structured as a debt instrument at the beginning, which matters for risk and documentation.

Step 2: The Startup Hits A “Conversion Event”

Most convertible notes are designed to convert when there is a future financing round (often called a “qualified financing”). This is typically when new investors invest under a priced round that sets a valuation for the company.

At that point, the note converts into shares rather than being repaid in cash.

Conversion can also be triggered by other events, depending on what you agree, such as:

• sale of the company (exit event)
• IPO (less common for early-stage notes, but possible)
• maturity date (if no financing occurs by a certain time)

Step 3: The Investor Receives Shares Based On The Agreed Formula

When conversion happens, the investor usually receives shares based on:

• the amount they invested (plus any accrued interest, if the note says it converts too)
• the price per share in the new round
• a discount and/or a valuation cap (if included)

This is where the commercial “deal” of a convertible note really sits. Two notes with the same investment amount can convert into very different ownership outcomes depending on how these mechanics are drafted.

The Key Terms That Determine What Happens At Conversion

If you’re negotiating a convertible note, you’ll usually spend most of your time on a handful of terms that directly affect conversion and risk. Below are the big ones, explained in plain English.

Valuation Cap

A valuation cap sets a maximum valuation at which the note will convert, even if the next round valuation is higher.

Founders often think of the cap as a way to “reward” early investors for taking early risk. Investors usually see it as protection against being diluted if the company’s valuation jumps before the priced round.

Example: If your next round values the company at $20 million, but the note has a $10 million valuation cap, the investor may convert as if the company was valued at $10 million (resulting in more shares for them).

Discount Rate

A discount gives the noteholder shares at a lower price than the new investors pay in the next round.

Example: If the next round investors pay $1.00 per share and the note has a 20% discount, the note converts at $0.80 per share (meaning the investor receives more shares for the same amount invested).

Notes can include a discount, a cap, or both. If both apply, the note typically converts on the more favourable terms for the investor (but the drafting matters).

Interest Rate

Convertible notes often include interest. In many startup notes, the interest isn’t intended to be paid in cash; instead, it accrues and may convert into shares along with the principal.

This is worth checking carefully. Interest that converts increases dilution at conversion.

Maturity Date (And What Happens If You Don’t Raise)

The maturity date is when the note becomes due.

In theory, if the note reaches maturity and hasn’t converted, the investor may be able to demand repayment as a debt. In practice, many startups don’t have spare cash to repay, which can create real pressure.

It’s common for notes to handle maturity in one of these ways:

• automatic conversion at maturity (often at a pre-agreed valuation or formula)
• repayment is required (rarely founder-friendly, but it happens)
• the parties negotiate an extension (which can be stressful if the relationship is strained)

Qualified Financing Threshold

Many notes only convert automatically if a future funding round hits a minimum amount (for example, $1 million raised). This is often called a qualified financing threshold.

If your next raise is smaller than that threshold, the note might not convert automatically. That can lead to uncertainty and disputes if you expected conversion.

Most Favoured Nation (MFN) Clauses

An MFN clause typically means if you later issue a note with better terms to another investor, the earlier investor can elect to receive the better terms too.

This can be commercially reasonable, but it can also constrain your flexibility when raising multiple tranches.

Convertible Notes vs Equity: What Founders Should Think About Early

Convertible notes can be a great fit, but they’re not always the simplest option long-term. Before you commit, it helps to step back and consider what you’re optimising for.

Speed And Simplicity Now vs Complexity Later

A note can be fast to close, especially if you and the investor broadly agree on key terms.

But notes can also create “invisible dilution” because you don’t know exactly how much equity you’ve effectively promised until the conversion event happens. If you issue multiple notes, it can become hard to manage expectations across investors and founders.

Cap Table Planning (Including Future Investors)

When you take note money, you’re effectively setting expectations for your future priced round. Future investors will look at:

• how much note debt is outstanding
• the caps and discounts that apply
• whether the notes convert cleanly into the round

If notes are drafted inconsistently, or if the maturity date is approaching, it can complicate fundraising at exactly the wrong time.

Governance And Founder Control

Notes usually don’t come with shareholder voting rights straight away (because the investor isn’t a shareholder yet). However, the documents can still include controls and information rights.

Founders should watch for terms that feel more like equity control terms than a simple convertible instrument, particularly around:

• approval rights (what you can and can’t do without noteholder consent)
• reporting requirements
• events of default

If you already have multiple founders or existing investors, it’s also worth making sure your internal rules are clear and aligned. For example, a well-drafted Shareholders Agreement can help set decision-making rules before you start layering in fundraising arrangements.

Common Legal And Commercial Risks (And How To Avoid Them)

Most convertible note issues don’t arise because anyone is acting in bad faith. They happen because founders and investors assumed something was “standard”, but the document says something else.

Here are some of the common risk areas we see in early-stage fundraising.

Unclear Conversion Mechanics

Conversion terms should be precise. If the note says it converts at the “lower of the cap or discount” (or something similar), make sure that formula is actually clear and workable.

If conversion depends on definitions like “next equity financing” or “qualified financing”, those terms should be defined carefully to avoid grey areas.

Mismatch Between The Note And Your Company Setup

Convertible notes interact with your company’s structure and governing documents. If your company is registered with a constitution, check that it supports the issue of shares on conversion and any rights attached to those shares.

Many startups adopt a tailored Company Constitution early so fundraising events and share issues can be handled more smoothly.

Multiple Notes With Different Terms

Raising in tranches is common. But if each tranche has different caps, discounts, maturity dates, or definitions of conversion events, you can end up with a complex cap table and difficult negotiations at the priced round.

If you’re going to raise multiple notes, consistency (and a clear plan) matters.

Maturity Pressure

If the maturity date is approaching and you haven’t raised the next round, you may be negotiating from a weaker position. This can lead to rushed extensions or amendments with less favourable terms.

As a founder, it’s worth keeping a simple internal dashboard of:

• each note’s maturity date
• conversion triggers
• investor consent thresholds (if any)

Misalignment Between Founders And Investors On “What This Means”

A note can feel informal, especially when it’s coming from friends, family, or angels. But it’s still a binding legal arrangement that can materially affect ownership and control later.

Clear documentation (and clear conversations) early can protect relationships later.

What Other Documents Should You Consider Alongside A Convertible Note?

A convertible note is usually just one piece of your startup’s legal foundation. Depending on how you operate, raise funds and engage with customers, there are a few other documents you should consider having in place.

• Founders documents: If you have more than one founder, consider decision-making, exits, IP ownership and deadlock protections. This is often handled through a Founders Agreement.
• Employment arrangements: If you’re hiring early team members, having a proper Employment Contract helps set expectations around duties, confidentiality and IP.
• Confidentiality protections: If you’re sharing sensitive information with contractors, advisors, or potential partners, a Non-Disclosure Agreement can help protect confidential information.
• Customer terms: If you sell online or operate a platform, clear terms reduce disputes and help manage liability. Many startups use tailored Business Terms depending on what they sell and how they deliver it.
• Privacy compliance: If you collect personal information (even just emails for a waitlist), you’ll likely need a Privacy Policy that explains what you collect, why you collect it, and how you handle it.

Not every startup needs every document on day one, but having the right legal building blocks early can make fundraising smoother and reduce the risk of disputes later.

Key Takeaways

• A convertible note is usually a loan that can convert into equity later, often at your next priced funding round.
• If you’re asking “how does a convertible note work”, the key is understanding the conversion event and the formula that determines how many shares the investor receives.
• The most important commercial terms are typically the valuation cap, discount rate, interest, maturity date, and what counts as a qualified financing.
• Convertible notes can help you raise quickly and defer valuation, but they can add complexity later if the terms are unclear or if you issue multiple notes with inconsistent mechanics.
• Your note should fit properly with your broader legal setup (constitution, founders arrangements, and cap table planning) to avoid surprises at conversion.
• Getting the documents right early can save significant time and cost when you move to a priced round or an exit.

This article is general information only and isn’t legal, financial or tax advice. Convertible notes can have significant legal, accounting and tax implications, so you should get advice for your specific circumstances before issuing or investing.

If you’d like a consultation on raising funds with a convertible note, you can reach us at 1800 730 617 or team@sprintlaw.com.au for a free, no-obligations chat.