If you’re growing a business in Australia, there’s a good chance you’ll eventually come across the idea of setting up (or buying) a subsidiary company.
Sometimes it’s because you’re taking on investors. Sometimes it’s because you want to separate risk across different business lines. And sometimes it’s simply because you’re expanding and the structure you started with no longer fits what you’re building.
Either way, the definition of a subsidiary matters because it affects who controls what, which entity signs contracts, who carries liability, and how you plan for growth.
Below, we’ll walk you through what a subsidiary is (in plain English), how to tell if a company is a subsidiary, why small businesses use subsidiary structures, and what legal housekeeping you should plan for as you scale.
What Is The Definition Of A Subsidiary?
In simple terms, a subsidiary is a company that is controlled by another company.
The company that controls it is often called the holding company (or “parent company”). If you’re planning a group structure, it’s worth understanding how Holding Companies typically work alongside subsidiaries in Australia.
So, when people search “define subsidary” (a common misspelling), what they’re usually trying to understand is this control relationship:
- Holding (parent) company: the company that has control.
- Subsidiary: the company that is controlled.
In Australia, the meaning of “subsidiary” is closely tied to the idea of control under the Corporations Act 2001 (Cth) (see section 46). While the legal tests can get technical, the practical question is straightforward:
Does one company have the power to direct the other company’s decisions at a governance level?
If the answer is yes, you may have a holding/subsidiary relationship (even if your internal conversations call it something else).
How Do You Know If A Company Is A Subsidiary?
A company doesn’t become a subsidiary just because you “work closely” with it, or because it uses your branding. The key factor is control, as defined under the Corporations Act.
Control can show up in a few different ways, including ownership and governance rights.
1. Majority Ownership Of Voting Shares
The most common scenario is that Company A owns more than 50% of the shares in Company B (and those shares carry voting rights).
If Company A can vote to appoint and remove directors (or pass shareholder resolutions) in Company B, that is a strong indicator of control.
This is also why it’s important to keep your share records and ownership documents in good order as the group grows (especially if you’re bringing in investors or issuing different classes of shares).
2. Power To Control The Board
Control isn’t only about share percentage. You can have control if you can control the composition of the subsidiary’s board (for example, through rights to appoint or remove directors).
For example, a shareholders agreement might give one shareholder the right to nominate a majority of directors, even if they don’t own more than 50% of shares.
In practice, this can happen where:
- there are different share classes (e.g. ordinary vs preference shares) with different voting rights, or
- an investor takes a minority stake but negotiates strong governance rights, or
- the parent company has approval rights that effectively determine key board or shareholder decisions.
If you want a deeper explanation of what “control” can mean in a corporate law sense, Understanding Control is a helpful concept to get clear on early.
3. Commercial Influence vs “Subsidiary” Control
Sometimes, one business has significant commercial influence over another (for example, through funding arrangements, management agreements, supply arrangements, or exclusive distribution deals).
However, commercial influence on its own doesn’t usually make one company the other’s subsidiary. Under the Corporations Act definition, a subsidiary relationship generally turns on corporate control (such as voting power, control of the board’s composition, or being able to cast (or control the casting of) more than half of votes at a general meeting).
That’s why it’s important not to assume an entity is a subsidiary just because the relationship is close in practice or one party has strong bargaining power.
4. A Quick “Reality Check” Example
Let’s say you run a fast-growing eCommerce brand through a holding company, and you want to launch a new product line with different risks (for example, a regulated product or higher warranty exposure). You set up a new company for that product line, and the holding company owns 100% of the shares.
In that scenario, the new company is a subsidiary because it’s clearly controlled by the holding company.
On the other hand, if you simply create a new trading name under the same company, you haven’t created a subsidiary - you’ve just created another brand under the same legal entity.
Why Would A Small Business Use A Subsidiary Structure?
Subsidiary structures aren’t just for big corporates. For startups and small businesses, they can be a practical tool - but only when you have a clear reason for the complexity.
Here are some common reasons we see.
1. Separating Risk (Liability Containment)
If your business has multiple business lines, a subsidiary can help isolate risk so one part of the business doesn’t automatically drag down the whole group.
For example, you might keep:
- a lower-risk service business in one company, and
- a higher-risk product business (manufacturing, imports, warranties, regulated goods) in another company.
Important note: separation isn’t “magic protection”. If the holding company gives guarantees, if directors act improperly, or if contracts are structured in a way that pulls the parent into the risk, the protection can be reduced.
2. Bringing In Investors (Or Different Investors For Different Projects)
Subsidiaries can make it easier to ring-fence a specific venture for investment.
For instance, you might want Investor A to invest in the main operating business, but Investor B to invest only in a specific new venture (like a new app, a new location rollout, or an R&D project).
When ownership and decision-making are going to be shared, getting the governance documents right becomes crucial. That often includes a Shareholders Agreement that sets out decision-making, share transfers, funding obligations, and what happens if someone wants to exit.
3. Protecting IP And Brand Assets
Some businesses use a holding company to own key intellectual property (like trade marks, software, domain names, and brand assets), then license those assets to operating subsidiaries.
This can be useful if you later sell an operating business while keeping the brand group, or if you want to ensure your core IP stays protected even if one operating entity runs into problems.
To do this properly, you’ll usually need clear intercompany agreements (for example, an IP licence agreement) so the operating entity’s right to use the IP is documented.
4. Expansion Into New Regions Or Business Models
If you’re opening new sites, expanding interstate, or launching a new revenue stream (like moving from services into subscriptions), a subsidiary can be a clean way to separate reporting, contracts, and risk.
This is also where some businesses start thinking about special purpose entities for specific projects. If you’re using a “one company per project” approach, it’s worth understanding the concept of Special Purpose Vehicles (SPVs) and when they make sense.
What Legal And Compliance Issues Come With Subsidiaries In Australia?
A subsidiary structure can be powerful - but it also comes with extra legal and admin responsibilities. If you’re setting one up, it’s worth planning for these issues upfront so you don’t end up with a “structure on paper” that doesn’t work in practice.
1. Directors’ Duties Still Apply (Entity By Entity)
Each company in the group is a separate legal entity. That means directors’ duties apply separately for each company.
If you’re a director of both the holding company and the subsidiary, you need to think carefully about which company’s interests you are acting in at any given time - especially where there are transactions between entities (like loans, asset transfers, or shared employees).
If you’re still getting comfortable with the corporate governance basics, it helps to be clear on the Director vs Shareholder distinction, because control and responsibility aren’t always the same thing.
2. Contracts Need To Be Signed By The Right Entity
One of the most common practical problems we see in growing business groups is that the “wrong” company signs the contract.
For example:
- your website terms name the holding company, but your operating subsidiary is the one taking customer payments;
- your staff employment contracts name one entity, but payroll is run through another;
- a supplier contract is signed by the parent company “for convenience”, even though the subsidiary is the real buyer.
These mismatches can create avoidable risk and confusion if there’s a dispute, a payment issue, or a warranty claim.
As your structure becomes more complex, having a consistent approach to signing, invoicing, and contracting becomes just as important as the structure itself.
Holding companies and subsidiaries often enter into transactions with each other, such as:
- intercompany loans,
- IP licence fees,
- management fees,
- shared services arrangements, and
- asset transfers (like equipment, vehicles, or stock).
These should be documented properly, even if you “control both sides”. Clear documentation helps with governance, tax reporting, and avoiding disputes later (including disputes between shareholders if the group isn’t owned by one person).
It can also help to understand how the law treats entities that are connected or linked. The concept of a Related Entity can be relevant in corporate and compliance contexts.
4. Employment And Workplace Compliance Across Entities
If you employ staff through one entity but they work across multiple entities (or you shift employees as the group evolves), you’ll want to think carefully about:
- who the legal employer is,
- what entity is responsible for award compliance and payroll obligations, and
- what policies apply (and whether they apply consistently across the group).
In many cases, it’s better to document employment properly from day one with the right entity using an Employment Contract that matches the real working arrangements.
5. Tax And Reporting (High-Level Considerations)
Tax advice is very case-specific, so you’ll want to speak to an accountant or tax adviser about your exact structure. Sprintlaw doesn’t provide tax advice.
However, at a practical level, multiple entities can mean:
- multiple sets of financial statements and compliance admin,
- potential group tax considerations depending on ownership and operations, and
- additional reporting requirements as you scale or bring in investors.
The key takeaway is that a subsidiary structure can bring benefits, but it’s rarely “set and forget”. It needs ongoing governance and clean record-keeping.
What Documents And Housekeeping Should You Put In Place?
If you’re setting up a subsidiary (or realising you already have one), it helps to treat it like a proper system - not just a box on an org chart.
Below are some documents and processes that often matter in real life.
1. A Clear Constitution And Governance Framework
Each company should have a clear governance foundation, including a properly drafted Company Constitution (or a decision to rely on replaceable rules, where appropriate).
This is especially important when:
- there are multiple shareholders,
- you’re issuing different share classes,
- you’re bringing in investors, or
- you want clear rules about director appointments and shareholder voting.
2. Shareholder Documentation (Especially Where Ownership Might Change)
If ownership is likely to change over time - for example, bringing in family members, co-founders, or investors - plan early for what happens when shares move between people or entities.
Even seemingly “simple” changes can create legal and tax flow-on effects, so it’s important to document them carefully. For example, a transaction like Transferring Shares can raise governance and control questions that affect whether an entity remains a subsidiary.
3. Intercompany Agreements (So Everyone Knows The Rules)
Where companies within the group deal with each other, you may need intercompany agreements, such as:
- IP licence agreements (if one entity owns the IP and another uses it),
- management services agreements (if one entity provides staff/admin/support),
- loan agreements (if one entity funds another), and
- supply arrangements (if one entity buys and sells to another).
These don’t have to be overly complicated, but they should be clear and consistent - especially if you have multiple shareholders or you’re preparing for due diligence.
4. Clean Contracting And Branding Practices
As your group grows, a simple internal rule can save a lot of pain later:
The entity named on the contract should match the entity doing the work and taking the payment.
That means checking your:
- customer terms and invoices,
- supplier contracts,
- leases,
- employment contracts, and
- website terms and privacy documentation.
If you’re collecting customer personal information through a website or app, each entity’s role should also be reflected correctly in your privacy documents (for example, who is collecting the information and why).
5. Plan For Future Scenarios (Before They Happen)
Subsidiary structures often become stressful when something changes - not when everything is going smoothly.
It’s worth thinking ahead about:
- What happens if you sell one part of the business?
- What happens if a co-founder exits?
- What happens if one subsidiary needs funding and another doesn’t?
- What happens if the group takes on debt (and who guarantees it)?
Even if you’re not ready to document every scenario, having the conversations early helps you choose a structure that supports your growth instead of slowing it down.
Key Takeaways
- The definition of a subsidiary is fundamentally about control - a subsidiary is a company controlled by another company (often the holding company) under the Corporations Act 2001 (Cth).
- Control can come from majority voting power, the power to control the board’s composition, or the ability to cast (or control the casting of) more than half of votes at a general meeting.
- Small businesses use subsidiaries to separate risk, bring in investors for specific ventures, protect IP, or expand into new products or regions.
- A group structure creates extra legal and admin work: directors’ duties apply entity-by-entity, contracts must be signed by the correct entity, and intercompany dealings should be documented properly.
- Strong governance documents (like a constitution and shareholders agreement) and clean contracting practices make subsidiary structures far easier to manage as you scale.
If you’d like help setting up a subsidiary structure (or reviewing whether your current structure is doing what you think it’s doing), you can reach us at 1800 730 617 or team@sprintlaw.com.au for a free, no-obligations chat.
