What Is a Demerger in Australia?

If you’re growing a startup or running a small business, there’s a good chance your structure has evolved faster than your paperwork. Maybe you started with one product, then added a second line. Maybe you acquired a small competitor, built a new SaaS feature, or launched a side venture that’s taken on a life of its own.

At some point, you might look at your business and think: this is really two (or more) businesses operating under one roof. That’s where a demerger can become a practical option.

So, what is a demerger?

In plain terms, a demerger is a corporate restructure where one business (or part of a business) is separated out from an existing company or group into a standalone entity. Done well, it can help you simplify operations, attract investment, reduce risk, and give each “side” of the business a clearer strategy.

It’s also worth noting that “demerger” can have a specific meaning in Australian tax law (with particular conditions and concessions). In this guide, we’re using the term in the practical, commercial sense most small businesses mean: separating a business line into its own entity.

Below, we’ll walk you through how a demerger typically works in Australia, when it can make sense for small businesses and startups, and what legal steps you should plan for.

What Is A Demerger (And What Does It Look Like In Practice)?

A demerger is the process of separating a business division, product line, asset pool, or subsidiary out of an existing business structure so it can operate independently.

There are lots of ways a demerger can be implemented, but the end result usually looks like this:

• Business A remains in the original entity (the “old” company or group).
• Business B is moved into a new company (or another existing company) with its own assets, contracts, staff, and governance.
• Ownership of Business B is dealt with by issuing shares, transferring shares, or selling the separated business (depending on the goal).

This is different to “just starting a new business”. With a demerger, you’re typically untangling an existing operation with existing assets, liabilities, contracts, IP, and relationships.

Common Demerger Scenarios For Small Businesses

Here are a few examples we often see in the small business and startup world:

• Splitting co-founders: Two founders want to go separate ways, and the business is split so each founder controls a different product line (with clear boundaries).
• Separating risk: You run a high-risk arm (eg manufacturing, construction, or regulated activities) and want to separate it from the “core” trading business.
• Investment readiness: Investors want a clean cap table and a focused entity that owns the main product (not a mix of unrelated projects).
• Sale preparation: You’re selling one part of the business and want to carve it out cleanly before a sale process starts.

Demerger Vs Spinoff Vs Sale

These terms get used loosely, so it helps to understand the difference:

• Demerger: A restructure that separates a business or division out of an existing entity or group.
• Spinoff: A type of demerger where the separated business becomes a new company with shares held by the same shareholders (often in similar proportions).
• Sale: A transaction where the separated business (or its shares/assets) are sold to a third party (or sometimes to a founder, employee, or related entity).

If you’re trying to decide whether you’re looking at a demerger/spinoff or a sale, a simple question helps: are the owners staying broadly the same, or is ownership changing hands?

Why Would A Startup Or Small Business Do A Demerger?

A demerger is usually about strategy and risk management. It’s not something you do for fun (because it can be complex), but it can be the cleanest solution when your business has outgrown its original structure.

1. To Make Each Business Easier To Run

When two lines of business sit in one company, you often end up with blurred decision-making, mixed finances, and operational friction. A demerger can create clearer accountability, budgets, and reporting.

2. To Reduce Risk (And Contain Liability)

If one part of your business carries more legal or commercial risk, splitting it out can help prevent that risk from spilling over into the rest of the business.

This is particularly relevant where one arm has bigger contractual exposure, warranty issues, employment complexity, or safety obligations.

3. To Attract Investment Or Prepare For Funding

Investors usually want to know exactly what they’re buying into. If your “main” product is bundled with side projects, unrelated assets, or legacy liabilities, it can complicate due diligence and valuation.

A demerger can help present a focused investment proposition, including clear ownership and governance settings (often supported by a tailored Shareholders Agreement).

4. To Enable A Sale Or Exit

If you want to sell one business line but keep the other, a demerger can carve out the sale business so the buyer gets what they need (and you keep what you want).

This is also where it’s important to think ahead about how ownership will be dealt with, including share transfers and approvals (for example, share transfers within a private company).

5. To Set Up A Group Structure

Some businesses demerge as part of building a group structure, where a holding entity owns multiple operating companies.

This can help with governance, risk separation, and future growth plans (and it’s common to consider a holding company structure in Australia once you’re operating multiple ventures).

How Does A Demerger Work In Australia? (A Practical Step-By-Step)

Every demerger is different, but most follow a similar sequence. The goal is to separate “what belongs to Business B” from “what stays with Business A”, then implement the legal steps so the separation actually works in practice (not just on a spreadsheet).

Step 1: Define What’s Being Demerged

Start by identifying the scope of what will move into the new entity. This usually includes some combination of:

• assets (equipment, inventory, customer lists, IP)
• contracts (customer contracts, supplier agreements, leases)
• employees and contractors (and the obligations attached to them)
• liabilities (debts, warranties, refunds, ongoing obligations)
• brand and intellectual property (names, domain names, software, content)

This is where many demergers get stuck: it’s not always obvious what “belongs” to which part of the business, especially if everything has been shared historically.

Step 2: Choose The New Structure

Next, you decide what the separated business will become. Common options include:

• New company incorporated for the demerged business: often the cleanest approach for startups.
• Existing company within the group: if you already have multiple entities, you might move the business into one of them.

If you’re setting up a new company, you’ll also need to think about its governance rules, including whether it adopts a tailored Company Constitution.

Step 3: Decide How Ownership Will Work

Ownership is one of the most important (and sensitive) parts of a demerger.

Questions to work through include:

• Will the existing shareholders own shares in the new company, and in what proportions?
• Are you bringing in a new investor at the same time?
• Is one founder buying out the other founder’s interest?
• Will different share rights be needed (eg different voting rights or dividend rights)?

Depending on your strategy, you might issue new shares, transfer existing shares, or restructure share classes (and it’s worth understanding the implications of different classes of shares if you’re tailoring control and economics).

Step 4: Move The Assets, Contracts, And People

This is the “implementation” phase, and it’s where careful documentation matters.

Depending on what’s being moved, you may need one or more of the following mechanisms:

• Asset transfers: transferring ownership of equipment, IP, inventory, domain names, and other assets.
• Assignment or novation of contracts: updating contracts so the new entity becomes the party (or replacing the contract entirely). Whether you can assign or need a novation depends on the contract terms and the type of rights/obligations being transferred, and it often requires the other party’s consent.
• Employment changes: moving employees to a new employer entity (often requiring proper communication, documentation, and careful handling of entitlements and continuity of service where applicable).

If you’re planning this for a particular “go-live” date, build in time for third-party consents. Many contracts don’t allow transfer without consent, and landlords, enterprise customers, and vendors can take time to respond.

Step 5: Update Governance And Records

After the restructure, you’ll typically need to update:

• ASIC records (directors, shareholders, share issues/transfers)
• bank accounts and authorities
• business name registrations and domains
• internal policies, delegations, and signing authorities

It’s also a good time to review how the two businesses will interact going forward (for example, will one entity licence IP to the other, share staff, or provide services?). If they’ll continue dealing with each other, you may be stepping into related entity territory, which has governance and documentation implications.

Key Legal (And Practical) Issues To Get Right During A Demerger

A demerger isn’t just a structural exercise. It has real legal consequences, especially around ownership, risk, contracts, and compliance.

Who Owns The Intellectual Property?

For many startups, the most valuable asset is IP: software code, brand names, product designs, content, trade secrets, and know-how.

Before you demerge, make sure you can clearly answer:

• What IP exists today?
• Which entity currently owns it?
• Which entity should own it after the demerger?
• Do you need a licence arrangement between entities?

This is especially important if both businesses will still operate under similar branding, or if one business will provide development services to the other.

What Happens To Customer Contracts And Warranties?

If customers contracted with the “old” entity, you can’t assume those contracts automatically move across.

You may need to:

• assign rights under contracts or enter into a novation (depending on what the contract allows and whether obligations also need to move)
• notify customers of the change
• update terms, invoices, and customer-facing policies

It’s also crucial to decide who remains responsible for legacy warranties, refunds, or claims. If you don’t document this properly, disputes can pop up later when neither entity thinks it’s responsible.

How Will Money Flow Between The Entities?

After a demerger, the two businesses may still share services (for example, one entity might provide admin support, marketing, or technology infrastructure).

To keep things clean, you’ll want to set clear terms for:

• service fees
• payment terms
• ownership of work product
• confidentiality
• liability allocation

If the entities are still owned by the same people, it can be tempting to keep things informal. But clear agreements help prevent misunderstandings later, especially if new investors come in or if one entity is sold.

Will Profits Be Paid Out (And How)?

If you’re demerging to create a more investable or scalable structure, profit distribution often becomes a key question. For companies, this usually involves dividends (but only when legally permissible).

It’s worth being across the basic rules around dividends, especially if the restructure changes who is entitled to profits, or if different share classes are being used.

What About Tax?

Tax outcomes can be a major driver (or deal-breaker) in a demerger. While we can’t give tax advice here, the key point is: restructures can trigger tax consequences, and you’ll want your accountant and lawyer aligned early.

In practice, tax considerations often affect:

• how assets are transferred (and at what value)
• whether you transfer shares vs transfer assets
• how intercompany loans and balances are treated
• timing (financial year impacts can matter)

If you’re planning a demerger and you haven’t yet mapped the tax position, it’s worth pausing and doing that before you commit to a structure.

What Documents Do You Usually Need For A Demerger?

The exact documents depend on your structure and what’s being separated. But in most demergers, you’ll need to document both:

• the separation itself (what moves, what stays, who is responsible for what), and
• how the new (and existing) business will operate going forward.

Common legal documents to consider include:

• Board and shareholder resolutions: approving the restructure steps, share issues/transfers, and key transactions.
• Asset transfer agreement: documenting the transfer of business assets (including IP, equipment, inventory, and goodwill).
• Share transfer documentation: if ownership is being rearranged between parties, including share transfer forms and approvals.
• Updated constitution (if needed): especially if the new company needs bespoke rules for governance, funding, or share rights.
• Shareholders agreement: where there will be multiple shareholders in either entity (or new investors), clarifying decision-making, exits, and protections.
• Service agreements between entities: if one entity will provide services to the other post-demerger (eg management, development, marketing, distribution).
• IP assignment or licence agreement: clarifying IP ownership and permitted use after the split.
• Employment documentation: if staff are moving to a new employing entity, you’ll want contracts and HR documents aligned to the new structure.

It’s also a good moment to check whether any “standard” business documents need to be refreshed because the contracting entity has changed. For example, if the demerged business collects customer data (almost all online businesses do), you may need a fit-for-purpose Privacy Policy under the new entity name.

If your demerger is happening because you’re bringing in investors or splitting co-founder roles, the documents above can be the difference between a smooth transition and a messy dispute later.

Key Takeaways

• A demerger is a restructure that separates a business (or part of a business) out of an existing entity or group into a standalone entity.
• Demerger strategies are common when your business has multiple product lines, different risk profiles, or a need for a clearer investment-ready structure.
• Most demergers involve mapping what’s being separated, choosing the new structure, dealing with ownership, transferring assets/contracts/people (often with third-party consents), and updating governance records.
• Key risk areas include IP ownership, contract transfer mechanics (assignment vs novation), legacy liabilities, employee arrangements and entitlements, and how the two entities will interact after the split.
• Clear documentation matters, especially where co-founders, investors, or future sale plans are involved.
• Tax outcomes can significantly affect demerger design, so it’s important to align legal and accounting advice early.

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