Discretionary Trust vs Unit Trust: What’s the Difference and Which Trust Structure Is Right for Your Australian Business?

Thinking about using a trust for your next venture? Choosing the right structure early can make a big difference to control, tax outcomes, investor flexibility and asset protection. In Australia, the most common business trusts are discretionary trusts and unit trusts - and while they share some features, they work very differently in practice.

In this guide, we’ll explain how each trust works, the key legal differences, when each structure is typically used, and the practical steps to set one up properly. By the end, you’ll be clear on the pros and cons and better placed to choose a structure that fits your goals.

How Trusts Work In Australia (And Where Businesses Use Them)

A trust is a legal relationship where a trustee holds and manages assets for the benefit of others (beneficiaries or unit holders). The terms of the arrangement are set out in a trust deed. In a business context, trusts are often used to hold operating assets, distribute profits to owners, and create separation between personal and business risk.

Discretionary Trusts (Often Called Family Trusts)

In a discretionary trust, the trustee has discretion over how to distribute income and capital among a defined class of beneficiaries, in line with the powers in the trust deed. There’s no fixed entitlement to a specific person unless and until the trustee resolves to distribute.

This flexibility is why discretionary trusts are common for family-run businesses and investment groups that want adaptable distribution choices and potential asset protection benefits.

Unit Trusts

A unit trust divides the underlying interest into units. Each unit holder owns a set number of units, and distributions of income and capital are generally made in proportion to those units. This creates a more fixed, share-like arrangement, which can be easier to value, transfer or sell.

Unit trusts are popular for joint ventures and ventures with unrelated co-owners or external investors who want clarity over ownership percentages and entitlements.

Discretionary Trust vs Unit Trust: Key Differences Explained

Both structures can work well - but they suit different scenarios. Here are the main differences to consider as you weigh up a discretionary trust vs a unit trust for your Australian business.

1) Distributions And Flexibility

• Discretionary trust: The trustee decides who receives income and capital each year (within the rules in the trust deed). This can help you respond to changing family or business circumstances, or manage distributions in a tax-conscious way. Any undistributed income can be taxed at the top marginal rate at the trust level, so timely and valid resolutions are important.
• Unit trust: Distributions follow unit holdings (for example, a 30% unit holding typically receives 30% of distributions). There is less flexibility, but more certainty for each investor.

2) Control And Ownership

• Discretionary trust: Control sits with whoever controls the trustee and, commonly, the appointor (the person or entity with power to appoint and remove the trustee). Beneficiaries have an expectation but not a fixed right to distributions unless a resolution is made.
• Unit trust: Owners have a direct, fixed economic interest via their units. Units can often be transferred or sold (subject to the deed). This can make it simpler to bring in investors or facilitate exits because ownership is clearly measured.

3) Tax Treatment Considerations

Trust taxation is complex and depends on your deed, resolutions and the tax law applying that year. In general:

• Discretionary trust: Distributed income is taxed in the hands of beneficiaries who are presently entitled. Planning must consider anti-avoidance rules. If income is not effectively distributed, it may be taxed at the highest marginal rate to the trustee. Keep accurate, timely resolutions and records.
• Unit trust: Income typically flows to unit holders in proportion to units held. Whether a unit trust is treated as a “fixed trust” for tax law purposes is a technical question - many unit trusts will not automatically qualify as “fixed.” Eligibility can affect how losses and franking credits are handled. Specialist tax advice is important here.

Because tax outcomes turn on your specific arrangement, it’s wise to get tailored tax guidance alongside legal help when you establish your trust and before making key distribution decisions.

4) Asset Protection And Risk

• Discretionary trust: Where beneficiaries don’t have a fixed entitlement, there can be asset protection advantages in certain scenarios. Protection depends on the deed, proper administration, and not using the trust to defeat creditors. Many owners use a corporate trustee to help separate personal and business risk.
• Unit trust: A fixed unit holding is a more easily identifiable asset of the unit holder. That can make valuation and transfer simpler, but it can also be more readily visible to creditors in some circumstances. Again, many businesses use a corporate trustee to help manage risk.

5) Typical Use Cases

• Discretionary trusts: Family businesses, investment holding, structures prioritising flexible distributions and family wealth planning.
• Unit trusts: Joint ventures, projects with multiple unrelated investors, property syndicates, and businesses that need easier in-and-out pathways for owners.

If you’re exploring trust structures more broadly, it can help to read a high-level overview of trusts in Australia and how they’re commonly used by business owners.

Which Trust Structure Fits Your Goals?

There’s no one-size-fits-all answer. Start with your goals, who’s involved, and how you expect ownership or distributions to change over time.

Choose A Discretionary Trust If You Want Flexibility

• You want the trustee to decide who receives income and capital each year within a defined family group or class.
• Your beneficiaries are closely related (or part of the same family group) and share aligned interests.
• You want to prioritise control and asset protection features (noting these depend on proper setup and use).
• You do not expect to bring in unrelated investors or sell fixed stakes frequently.

Choose A Unit Trust If You Need Fixed Interests And Clear On‑Ramps For Investors

• You have unrelated co-founders, joint venturers or investors who want fixed percentages and transparency.
• You expect ownership to change over time (for example, issuing or transferring units as people enter or exit).
• You want an easier way to value and transfer interests through units, subject to the deed.
• Certainty of entitlement is more important than flexible year‑to‑year distribution choices.

Still unsure? It’s normal to weigh up both options. A short chat with a legal adviser can help you map your goals to a structure, including how it ties in with any company or partnership you use alongside the trust.

How To Set Up A Discretionary Or Unit Trust (Step‑By‑Step)

Setting up a trust in Australia is a legal process. The exact steps will vary with your circumstances, but most setups look like this.

1) Get A Tailored Trust Deed

The deed is the rulebook for how the trust works - it defines beneficiaries (or unit holders), trustee powers, distribution mechanics, appointor powers, transfer rules, and more. A carefully drafted deed is essential. Errors or vague terms can create compliance issues or disputes later.

For a unit trust, ensure the deed properly covers unit issuance, transfers, pre‑emptive rights (if any), valuation mechanisms and decision‑making. For a discretionary trust, ensure the class of beneficiaries is clear and the trustee’s powers and distribution mechanics are workable for your goals.

Understanding what a deed is under Australian law will help you see why this document deserves attention from day one.

2) Choose And Appoint The Trustee

Your trustee can be an individual or a company. Many business owners use a corporate trustee to limit personal liability and make control changes easier (for example, by changing company directors or shareholders rather than the trustee itself).

3) Settle The Trust

A trust is usually “settled” when a settlor contributes a nominal amount to bring it into existence. The settlor must be independent (not a beneficiary). For more detail on this role, read about the settlor in an Australian trust.

4) Get Your ABN/TFN (And ACN If You Have A Corporate Trustee)

Trusts that will earn income typically apply for an ABN and a TFN for tax reporting. If you’re using a company as trustee, that company will also have an ACN. Here’s a straightforward explainer on trust requirements for ACN, ABN and TFN and how these registrations fit together.

5) Open A Dedicated Trust Bank Account

Keep trust funds separate from other accounts. Separate banking supports proper record‑keeping and helps maintain the integrity of the structure.

6) Register For GST If Required

If your enterprise’s GST turnover is at or above the GST registration threshold, you’ll need to register for GST. Your accountant or tax adviser can help you determine timing and ongoing lodgement needs.

7) Put The Right Agreements Around The Structure

Especially for multi‑owner trusts, the deed works together with your co‑owner agreement. For unit trusts, consider a Unitholders Agreement to document decision‑making, transfers, dispute resolution and exit terms. If your trust owns shares in a company, you may also need a Shareholders Agreement at the company level to keep everything aligned.

8) Keep Proper Records And Make Valid Resolutions

Trustees must maintain accurate records, including trustee minutes, distribution resolutions and financial statements. Good record‑keeping is critical to compliance and reduces the risk of disputes.

Tip: Before you finalise your structure, speak with both a lawyer and a tax adviser. Legal and tax settings work together - getting them aligned up‑front saves time and stress later.

Compliance, Risk And Everyday Operations

Once your trust is set up, day‑to‑day compliance and strong contracts keep things running smoothly.

Liability And Asset Protection

Using a corporate trustee can help protect personal assets by separating business risk from your own name. That protection depends on operating within the deed and the law, avoiding personal guarantees where possible, and not mixing funds. If you also operate through a company underneath the trust (for example, the trust holds shares and the company employs staff), consider a well‑drafted company setup to match your structure and growth plans.

Tax And Reporting

Trustees generally lodge an annual trust tax return and provide beneficiaries or unit holders with statements about their entitlements. Distribution timing and resolutions matter - work closely with your accountant to get these right each year. Because “fixed trust” status and loss/franking credit rules are technical, specialist tax advice is recommended.

Key Legal Documents For A Trust‑Operated Business

• Trust Deed: The core rules for your trust. For unit trusts, ensure clear rules for unit issues, transfers and decision‑making; for discretionary trusts, ensure beneficiary classes and trustee powers are precise.
• Unitholders Agreement or Co‑Owner Agreement: For a unit trust, a Unitholders Agreement helps manage voting, distributions, transfers, deadlocks and exits.
• Shareholders Agreement (if there’s a company in the structure): Where the trust owns shares in an operating company, a Shareholders Agreement aligns governance and owner rights at the company level.
• Customer Contracts or Terms: Clear service or sales terms set expectations, limit liability (as appropriate) and help with Australian Consumer Law compliance.
• Employment Contracts and Policies: If you hire staff, use compliant Employment Contracts and practical workplace policies to meet Fair Work obligations.
• Privacy And Data: If your business is an APP entity under the Privacy Act 1988 (Cth) - for example, most businesses with an annual turnover of $3 million or more, or those handling certain types of sensitive information - you must comply with the Australian Privacy Principles and have a clear Privacy Policy. Many smaller businesses also choose to publish a Privacy Policy as best practice and to meet platform or client expectations.
• Intellectual Property (IP): Protect your brand and avoid disputes. Consider registering your brand name or logo as a trade mark through trade mark registration.

Everyday Legal Compliance

Depending on your activities, keep an eye on these areas:

• Consumer law: Comply with the Australian Consumer Law on advertising, refunds and guarantees.
• Employment law: Meet minimum entitlements, safety and record‑keeping requirements if you employ people.
• Licences and permits: Industry‑specific licences, council approvals or professional registrations may apply to your operations.
• Signatures and execution: Ensure contracts are executed correctly - for example, understanding how deeds are signed can prevent enforceability issues.

Can You Change Structures Later?

Trust deeds can sometimes be varied, and units can often be issued or transferred within the rules of the deed. However, converting a discretionary trust to a unit trust (or vice versa) is generally a fresh setup and may trigger tax or duty consequences. Before making structural changes, get legal and tax advice so you can plan the timing and steps carefully.

Key Takeaways

• Discretionary trusts give the trustee flexibility over distributions and can support family wealth planning and asset protection goals when properly set up and administered.
• Unit trusts offer fixed ownership via units, making entitlements clearer and transfers more straightforward - a good fit for unrelated co‑owners and investor‑friendly structures.
• Tax outcomes depend on your deed and circumstances. Unit trusts are not automatically “fixed” for tax purposes - obtain specialist advice on losses, franking credits and annual distribution steps.
• A robust deed, correct trustee choice, valid resolutions and clean records are essential to keep your trust compliant and effective.
• Round out your structure with the right contracts: Unitholders or Shareholders Agreements, strong customer terms, compliant Employment Contracts, an appropriate Privacy Policy and brand protection through trade mark registration.
• It’s easier and more cost‑effective to get your structure right from day one. Align legal and tax advice early so your trust supports your long‑term goals.

If you’d like a consultation on setting up or reviewing a discretionary trust or unit trust for your business, you can reach us at 1800 730 617 or team@sprintlaw.com.au for a free, no‑obligations chat.