Choosing between a discretionary trust and a unit trust is not simply a legal paperwork decision. It can affect who is taxed on business income and capital gains, how profits can be used within a family or investor group, how easily ownership can change, and how much administration is required each year.
For Australian business owners, the right structure is rarely the one that produces the lowest tax in a single profitable year. A structure needs to suit the people who will own, control and benefit from the business over time, while standing up to the trust deed, tax law and commercial reality.
The key difference is who has the right to trust income and capital
A trust is an arrangement in which a trustee holds and manages assets for beneficiaries. The trustee may be an individual or a company, and a corporate trustee is commonly used for business trusts. The trust itself is not the same as a company.
The trust deed is central. It sets out the trustee’s powers, the beneficiaries, how income and capital may be dealt with, and the rules for changing the arrangement. Tax planning cannot override the deed.
A discretionary trust, often called a family trust, gives the trustee discretion to decide which eligible beneficiaries receive income or capital in a particular year. The beneficiaries do not usually have a fixed entitlement to a set share before the trustee makes a valid decision.
A unit trust divides beneficial interests into units. Unit holders generally have rights to income and capital based on the units they hold. In a conventional unit trust, a person who owns a larger proportion of units will generally receive a larger proportion of distributions.
In practical terms:
- Discretionary trust: flexible annual allocation among eligible beneficiaries, subject to the deed.
- Unit trust: ownership and economic rights are generally tied to units.
- Discretionary trust: often used for family-owned businesses and investment structures where the ownership group is expected to remain within a family group.
- Unit trust: often used where unrelated parties, investors or business partners want defined ownership percentages and a clearer link between investment and return.
A unit trust is not automatically a “fixed trust” for every tax purpose merely because it has units. Fixed-entitlement rules can be technical and depend on the legal rights created by the deed and the surrounding arrangements. This matters particularly where tax losses, certain concessions or changes in ownership are involved.
How trust taxation works, and where a discretionary trust may help
Trusts do not operate like companies with a single company tax outcome on retained profits. Broadly, the income tax rules for trusts focus on whether beneficiaries are presently entitled to trust income at the end of the income year.
Where a beneficiary is presently entitled, the beneficiary will generally be assessed on their appropriate share of the trust’s taxable income. If income is not validly dealt with, the trustee may instead be assessed. The result can be unfavourable, particularly where there has been no effective distribution resolution or the trustee has not followed the deed.
For a discretionary trust, the potential tax advantage is flexibility. If the deed permits it, the trustee may decide each year which eligible beneficiaries should receive income or capital. This can allow distributions to be considered alongside the beneficiaries’ wider financial positions.
For example, a trustee may consider whether beneficiaries have:
- other taxable income from employment, a business or investments;
- carried-forward tax losses;
- deductible expenses;
- capital losses;
- cash needs;
- legal capacity to receive and control the distribution; and
- a genuine entitlement to the funds or benefit distributed.
That flexibility can produce a better overall family-group tax outcome than allocating all income to one owner every year. However, it is not a licence to distribute income on paper while someone else receives or uses the economic benefit.
The law includes anti-avoidance rules aimed at reimbursement arrangements. These rules can apply where a beneficiary is made entitled to trust income in connection with an arrangement under which another person receives a benefit, and the arrangement has a tax-reduction purpose outside ordinary family or commercial dealing. If the rules apply, the trustee can be assessed instead of the beneficiary.
This is why a valid distribution must be more than an accountant’s year-end journal entry. The trustee’s decision, the deed, the accounting records, beneficiary notifications and the way money is actually dealt with should all tell a consistent story.
A discretionary trust can also have flexibility in dealing with capital gains and franked distributions, but this is an area where the deed and formal resolutions matter greatly. The tax rules for trusts with capital gains have specific provisions for beneficiaries who are presently entitled or specifically entitled to relevant amounts. A poorly drafted or late resolution can lead to results that differ from what the trustee intended.
Why a unit trust may be less flexible for tax, but stronger for shared ownership
A unit trust can still be tax-effective, but its strength is often commercial clarity rather than annual income-splitting flexibility.
When each owner holds a defined number of units, the parties have a clearer economic arrangement from the beginning. This is particularly valuable where business partners contribute different amounts of capital, investors want a measurable stake, or parties want an easier way to value and transfer their interests.
In a straightforward unit trust, distributions will generally follow unit holdings. That means the trustee usually cannot redirect a larger share of income to one unit holder simply because that person has a lower personal tax position in a particular year.
This reduced flexibility is often exactly what investors want. A unit trust can make it easier to answer questions such as:
- Who owns what percentage of the business or property?
- Who is entitled to income?
- Who receives capital if an asset is sold?
- What happens if one investor exits?
- How should a new investor enter the arrangement?
- How should the purchase price of an interest be determined?
For unrelated owners, a unit trust may therefore reduce the scope for disputes. The ownership position is generally more transparent than a discretionary trust, where beneficiaries may have no fixed right to income or capital until the trustee exercises its discretion.
A unit trust can also use different classes of units where the deed permits. However, multiple unit classes, redemption rights, special distribution rights and related-party dealings should be designed carefully. Complexity can affect tax outcomes, investor rights and the ability to demonstrate that the trust operates as intended.
The tax question is not simply whether the unit trust pays less tax. It is whether fixed ownership rights produce a fair and workable allocation of income, gains, risk and control among the owners.
A discretionary trust is not automatically the better tax-saving structure
It is tempting to view a discretionary trust as the default choice for tax minimisation. That approach can create problems.
First, a discretionary trust only has useful flexibility if there are eligible beneficiaries who can properly receive distributions under the deed. A business owner cannot simply select any relative, friend, company or entity at year end without checking the trust deed and the tax consequences.
Second, personal tax outcomes vary from year to year. A beneficiary’s employment income, investment income, deductions, losses, residency status and other circumstances may change. What worked in one year may not work in the next.
Third, distributions to children and some other beneficiaries can be subject to special tax rules. These rules are complex and should not be approached as a simple income-splitting strategy.
Fourth, a discretionary trust does not create a permanent tax rate on business profits. If the trust distributes income to a company beneficiary, the company’s entitlement must be handled properly. Where the amount is left unpaid, it can create an unpaid present entitlement. Depending on the facts and arrangements, Division 7A may become relevant, including where trust funds are used by shareholders of the corporate beneficiary or their associates.
The important point is that a corporate beneficiary can be part of a broader business structure, but it is not a shortcut for extracting cash tax-free. Later payments, loans, debt forgiveness and dividends can all require careful planning.
Finally, money distributed to a beneficiary belongs beneficially to that beneficiary. If the trust retains or uses those funds, the records and legal arrangements must reflect that reality. Treating every distribution as money that can remain indefinitely available to the business owner is a common risk area.
Capital gains, business exits and asset protection need separate consideration
The structure that works during trading may not be the structure that works best on sale, succession, retirement or a dispute between owners.
Both discretionary trusts and unit trusts may be able to hold business assets, shares or investments. Both may potentially access capital gains tax concessions if the statutory conditions are met. The relevant conditions are detailed and can depend on matters such as the nature of the asset, the activities of the business, connected entities, control, ownership rights and how sale proceeds are distributed.
The small business capital gains tax concessions should never be assumed to apply merely because a business is small or family-owned. Eligibility needs to be reviewed before a sale is committed to, not after contracts are signed.
A discretionary trust can be useful for succession planning because the controller may have flexibility to benefit different family members over time. But this flexibility can also create uncertainty if family relationships change or there is no clear succession plan.
A unit trust can be more straightforward where the owners expect to sell or transfer defined economic interests. Units may be transferred or sold, subject to the trust deed and any unitholders agreement. However, a transfer of units can still have capital gains tax consequences and may trigger duty or landholder duty issues in some states and territories.
State taxes are especially important for trusts holding land or land-rich entities. Duty, land tax and payroll tax rules differ substantially between jurisdictions. Some jurisdictions apply different treatment to trusts, foreign persons, absentee owners or grouped businesses. The relevant state or territory must be identified before relying on any general statement about tax savings.
Asset protection also deserves its own advice. A trust does not automatically protect business assets from every claim, and a corporate trustee does not eliminate all risk. Guarantees, insolvency, unpaid tax liabilities, trustee indemnity rights, director duties and the way assets are financed can all affect the practical outcome.
A simple scenario: family flexibility versus investor certainty
Consider a business operated by a trustee company.
In the first option, the business is run through a discretionary trust for a family group. The trust deed permits distributions among adult family beneficiaries and a corporate beneficiary. At EOFY, the trustee reviews the trust’s income, the beneficiaries’ circumstances and the cash requirements of the business before making a properly documented resolution.
This structure may be suitable where the family wants flexibility, the owners have aligned interests and the trust will be actively administered each year.
In the second option, two unrelated founders each contribute capital and want equal rights to future income and sale proceeds. They establish a unit trust, each holding the same class and number of units. The unit trust may offer a clearer ownership framework because each founder’s entitlement follows their unit holding.
The unit trust may produce less scope to vary annual income allocations, but that may be appropriate. The founders may value certainty and fairness between themselves more than family-group distribution flexibility.
Neither outcome is inherently better. The better choice depends on the commercial relationship, the intended ownership pattern, the trust deed, the likely beneficiaries or unitholders, and the long-term exit plan.
Choosing the structure that fits the business, not just this year’s tax return
A discretionary trust may be worth considering where a family group wants annual flexibility in distributing income and capital, and is prepared to meet the ongoing compliance obligations. It can be a powerful structure, but only when the trustee follows the deed, makes valid and timely decisions, and ensures distributions reflect genuine legal and economic outcomes.
A unit trust may be more appropriate where there are unrelated business owners, external investors or a strong need for fixed ownership percentages. It may provide less annual tax flexibility, but it can offer a more transparent framework for contributions, distributions, control and exit arrangements.
Before choosing either structure, it is sensible to work through:
- who will contribute capital and labour;
- who should control the trustee;
- who needs to receive income and capital;
- whether ownership may change;
- whether the business may be sold in the future;
- whether land, valuable assets or investors are involved;
- whether a corporate beneficiary is being considered;
- the state or territory tax position; and
- the administration required at each EOFY.
The key takeaway is that a discretionary trust can sometimes create more opportunities to manage tax across an eligible family group, while a unit trust is often better suited to fixed commercial ownership. The structure most likely to save tax is the one that accurately reflects the business arrangement and is properly managed year after year.
This article is general information only and is not personal financial or tax advice. Trust taxation and business structures are complex, and the right outcome depends on your trust deed, beneficiaries, ownership arrangements and wider financial circumstances. Speak with a registered tax agent or accountant, such as, before establishing, changing or distributing from a trust.