A unit trust is an investment structure that pools money from multiple investors into a single fund. Each investor holds "units," which represent a proportional share of the total assets held by the trust. The fund is managed by a trustee, who is legally responsible for acting in the interests of the unit holders. It's one of the most common investment vehicles in Australia, sitting behind managed funds, infrastructure investments, and many property syndicates.
How a unit trust is structured
Three parties make a unit trust function. The trustee holds the assets on behalf of investors. The manager (sometimes the same entity, sometimes separate) makes the day-to-day investment decisions. And the unit holders are the investors themselves, each owning a defined slice of the fund.
The trust deed is the founding document. It sets out what the trust can invest in, how income is distributed, how units are priced, and what rights unit holders have. Once a unit trust is established, investors buy in by purchasing units at the current unit price. That price reflects the net asset value (NAV) of the fund divided by the total number of units on issue.
So if a fund holds $10 million in assets and has 10 million units on issue, each unit is worth $1.00. If the assets grow to $12 million, each unit is worth $1.20. The investor's gain is embedded in the unit price, not in a separate account.
Open-ended vs closed-ended unit trusts
Not all unit trusts work the same way. Open-ended trusts create new units when investors buy in and cancel units when investors redeem. The fund size changes with investor demand. Most retail managed funds in Australia use this structure.
Closed-ended trusts issue a fixed number of units at launch. After that, the only way to buy or sell is through a secondary market, often a stock exchange. Listed investment trusts (LITs) on the ASX are a common example. The unit price in a closed-ended structure can trade at a premium or discount to NAV, depending on market sentiment. That's a key difference from open-ended funds, where the price is always pinned to NAV.
How income flows through a unit trust
Unit trusts pass income directly to unit holders. The trust itself doesn't pay tax on that income; the obligation flows through to the investors, who pay tax at their personal marginal rates. This is called "flow-through" or "pass-through" taxation, and it's one of the main structural attractions of the trust format over a company structure.
Distributions are typically paid quarterly or annually. Each distribution statement tells the investor how much of the payment is ordinary income, capital gains, foreign income, or tax-deferred amounts. The tax treatment of each component differs, so the breakdown matters. Getting this right requires careful record-keeping, particularly for anyone managing their own tax return rather than using an accountant.
If you're trying to understand how income and tax interact with other business structures, it's worth reading about what a marginal tax rate actually is, since the flow-through nature of unit trusts means your personal rate directly determines your tax liability on distributions.
Who uses unit trusts and why
Unit trusts are used by retail investors accessing managed funds through superannuation or investment platforms. They're used by institutional investors pooling capital into infrastructure, property, and private equity. And they're used by family groups and small business owners as a flexible wealth-holding structure.
Three features make them attractive:
- Pooling gives small investors access to diversified assets they couldn't afford individually.
- Flow-through taxation avoids double taxation (income taxed at the trust level and again on distribution).
- Flexibility in distributing income allows the trustee to allocate different amounts to different unit classes, depending on how the trust deed is written.
That flexibility is worth pausing on. Some unit trusts issue different "classes" of units, each with different rights to income, capital, or voting. This makes them useful for structuring joint ventures or family investment vehicles where different investors want different economic outcomes.
Unit trusts vs other trust structures
A unit trust is distinct from a discretionary trust, which is the structure most commonly used in Australian family wealth planning. In a discretionary trust, the trustee has the power to decide each year how income is split among beneficiaries. There are no fixed entitlements. That flexibility can be powerful, but it also means no investor can point to a defined ownership stake.
In a unit trust, ownership is fixed and transparent. Each unit holder owns a known percentage of the fund. That certainty makes unit trusts better suited to commercial arrangements with multiple unrelated investors, where clear ownership records matter. It also makes them easier to value, which is relevant if you ever need to understand how a business valuation is conducted.
Risks unit holders should know about
Unit trusts are not risk-free. The value of units rises and falls with the underlying assets. A property trust holding commercial real estate is exposed to vacancy rates, interest rate changes, and property market conditions. An equity trust rises and falls with share prices.
Liquidity is another concern. Open-ended retail funds usually allow weekly or daily redemptions, but some trusts, particularly unlisted property funds, impose redemption queues or gates during periods of market stress. Investors found this out in 2008 and again during the COVID-19 volatility in 2020, when several Australian unlisted trusts suspended redemptions temporarily.
Fees also matter. Management fees, performance fees, custody fees, and administration costs all reduce the net return to unit holders. A unit trust charging 1.5 percent per year in fees needs to significantly outperform a low-cost index fund to justify the cost. Reading the product disclosure statement (PDS) is the only way to understand what you're paying.
Regulatory requirements in Australia
Unit trusts that accept money from retail investors must hold an Australian Financial Services Licence (AFSL) and issue a PDS. The Australian Securities and Investments Commission (ASIC) oversees compliance. Wholesale unit trusts, which only accept sophisticated or professional investors, face lighter disclosure obligations but still operate under the Corporations Act 2001.
The trustee also owes fiduciary duties to unit holders. Breaching those duties, by investing outside the trust deed's permitted assets or prioritising the manager's interests over investors, can expose the trustee to legal action. That accountability structure is what distinguishes a properly constituted trust from a less formal investment arrangement.
Unit trusts aren't a simple product, but they're a logical one once the structure is understood. The separation between asset ownership, management, and investor rights makes them more transparent than many alternatives, and the flow-through tax treatment can make them genuinely efficient for investors paying tax at lower marginal rates.