What Is a Testamentary Trust Will and When Do You Need One?

A testamentary trust will is one of the most powerful tools in Queensland estate planning — but it isn’t right for everyone. This guide from GM Law explains what a testamentary trust is, how it differs from a simple will, and when it’s genuinely worth setting one up.

What is a testamentary trust?

A testamentary trust is a trust created inside your will that only comes into effect after you die. Instead of handing an inheritance directly to a beneficiary, a trustee holds and manages the assets on their behalf, following the rules you set out in your will. While you’re alive it does nothing — there’s no trust bank account and no trust tax return. It is a “sleeping” structure that only activates when it’s needed.

Example: Sarah, a 35-year-old mum in Brisbane, leaves her estate to a testamentary trust run by her sister. If Sarah dies while her children are young, the trust pays for their education and living costs, releasing the capital to them at 25 rather than 18.

How is it different from a family or lifetime trust?

The key difference is timing. A family or inter vivos trust is created while you’re alive and holds assets now; a testamentary trust is written into your will and only exists after death. Because it’s built from estate assets, it also unlocks tax concessions for minors that a family trust cannot offer.

Which types of testamentary trust can you choose?

Most Queensland testamentary trusts are discretionary, but the structure can be adapted:

1. Discretionary trust — the trustee decides how income and capital are shared among a class of beneficiaries.
2. Minor’s or age trust — capital is held until a child reaches a set age.
3. Protective trust — tighter control for a vulnerable or spendthrift beneficiary.
4. Life interest / right of residence — lets someone (often a spouse) use a home or income for life.
5. Special disability trust — a statutory structure for a beneficiary with severe disability.

How does it compare to a simple will?

A simple will appoints an executor and gives your assets directly to your beneficiaries, who then own them in their personal names. A testamentary trust will instead places some or all of the inheritance into a trust, giving ongoing protection and tax flexibility a simple will cannot:

• Minors taxed at adult rates — a child’s trust income uses normal adult marginal rates and the tax-free threshold, not the usual penalty rates on minors.
• Income splitting — the trustee can stream income to beneficiaries on lower tax rates rather than taxing it all in one person’s name.
• Choice of what to distribute — income, capital gains and franked dividends (with credits) can go to whoever is best placed to use them.
• Year-by-year flexibility — distributions are re-decided annually to suit changing incomes and circumstances.

A simple will is cheaper and faster to administer; a testamentary trust does more work but costs more to prepare.

A simple will is often all you need when:

1. Your estate is modest and doesn’t generate much investment income.
2. Your beneficiaries are financially capable, independent adults.
3. There are no minor children or vulnerable beneficiaries to protect.
4. There’s little risk of divorce, bankruptcy or a family provision claim.
5. Beneficiaries need immediate access to their inheritance, not staged control.

The trade-off is that a simple will offers almost no asset protection or tax planning. Once assets are handed over, any income they generate is taxed at the beneficiary’s marginal rate, and the inheritance is exposed if that beneficiary later divorces or is sued. For a young family or a blended household, that exposure can matter more than the upfront saving. If you’re weighing up which structure fits, our guide to what to consider when making a will in Queensland walks through the wider decisions that shape a will, and GM Law can advise which path suits your circumstances.

Example: Tom and Linda, a retired couple on the Gold Coast with a paid-off home and two responsible adult children, choose simple mirror wills. Their estate is straightforward, no beneficiary is at risk, and a testamentary trust would add cost without adding real benefit.

Why would you use a testamentary trust?

The three big reasons are asset protection, tax efficiency, and control over how and when beneficiaries receive their inheritance. These benefits compound where beneficiaries are young, vulnerable, or exposed to financial risk.

How does it protect assets from creditors and divorce?

Because the assets are owned by the trust rather than the beneficiary personally, they can be harder for a beneficiary’s creditors or an ex-partner to reach. This is valuable for beneficiaries in litigation-prone professions or high-risk businesses. Protection is not automatic, though — if the at-risk beneficiary solely controls their own trust, a court may still treat the assets as theirs, so an independent co-trustee strengthens the shield.

Can it really reduce the tax my family pays?

Yes, and this is often the standout benefit. Income distributed to a minor from a testamentary trust is taxed at normal adult marginal rates — including the tax-free threshold — instead of the penalty rates that usually apply to children. That lets a trustee stream income to children under 18 tax-effectively. The concession only applies to “excepted trust income” (broadly, income from estate assets), so confirm the detail with your accountant.

How does it protect children and vulnerable people?

A trustee manages the money so a beneficiary who can’t — or shouldn’t — handle a lump sum is still provided for. Funds can be released for education, health and living costs, with capital preserved until the person is older or more capable. For a beneficiary with disability, a specially structured trust can provide support without affecting means-tested benefits such as the NDIS or pension.

Does it give more control over the inheritance?

Yes. A discretionary testamentary trust lets the trustee decide who receives income or capital, how much, and when — adapting to each beneficiary’s circumstances, health and tax position over time. A simple will simply can’t pivot like this once assets are handed out.

When should you actually set one up?

A testamentary trust is usually worth considering whenever there is something meaningful to protect or someone who can’t manage an inheritance on their own. The most common reasons Queensland families set one up are:

1. Minor children — to manage and stage an inheritance rather than handing it over at 18.
2. Blended families — to provide for a current spouse while preserving capital for children from an earlier relationship.
3. Vulnerable beneficiaries — to support a beneficiary with disability or one who struggles to manage money, without risking their benefits.
4. Beneficiaries exposed to risk — to shield an inheritance from a beneficiary’s creditors, business failure or divorce.
5. Significant or income-producing assets — to capture the trust’s tax advantages on income earned from the inheritance.
6. A higher risk of a family dispute — to set clear rules and reduce the chance of a claim against the estate.

Is it worth it for a blended family?

Often, yes. A testamentary trust can give your surviving spouse a life interest — income or the right to live in the home — while preserving the capital for your own children. This reduces the risk of children from an earlier relationship being unintentionally disinherited, and lowers the chance of a dispute.

Should business owners and professionals consider one?

If a beneficiary runs a business or works in a profession that is frequently sued, keeping their inheritance in trust rather than in their own name adds a valuable layer of protection against creditors and business failure.

When is a testamentary trust NOT worth it?

A testamentary trust adds cost, complexity and ongoing administration, so it is genuinely not the right answer for every estate. There’s little point creating one where there is nothing meaningful to protect and no tax advantage to capture. Pushing every client toward a trust would be poor advice — the structure has to match the situation.

A testamentary trust may not be worth it when:

1. The estate is small — with few income-producing assets, the ongoing admin outweighs the benefit.
2. All beneficiaries are mature, capable adults with no particular vulnerability.
3. There are no minor or vulnerable beneficiaries who need structured protection.
4. The risk of a family provision claim is low and the family is harmonious.
5. Assets are mostly non-income-producing (for example, a single home the family will sell), reducing the tax benefit.
6. Beneficiaries need immediate capital rather than staged distributions.

There are also ongoing obligations people underestimate: a running trust needs its own tax file number, a separate bank account, annual tax returns where it earns income, and proper records for years. If no one in the family is willing to take on that administration, a trust can become a burden rather than a benefit. In these cases a well-drafted simple will often achieves the same practical outcome at lower cost. The honest answer is that it depends on your assets, your beneficiaries and your goals — which is exactly the conversation to have with your solicitor before committing. GM Law will tell you plainly if a simple will would serve you just as well.

Example: Margaret, a widow with one financially secure adult daughter and an estate consisting mainly of her home, is advised that a simple will suits her perfectly — a testamentary trust would add thousands in cost and yearly paperwork for no real gain.

How do you set up a testamentary trust in your will?

You create it by including carefully drafted trust clauses in your will. Those clauses specify which assets go into the trust, who the beneficiaries are, who acts as trustee, and how distributions are to be managed. Because the wording drives everything the trustee can and can’t do, this is not a DIY exercise.

Who should you choose as trustee?

Pick someone who is:

1. Trustworthy and organised — they may manage money for a decade or more.
2. Impartial — helpful where siblings or step-relations might clash.
3. Capable — complex estates may warrant a professional or corporate trustee.

Always name at least one replacement trustee in case your first choice can’t act, and set out how a trustee can be removed or replaced.

What’s the difference between an executor and a trustee?

Your executor administers the estate; your trustee runs the ongoing trust afterwards. They can be the same person or different people. The executor gathers assets, pays debts and obtains probate, then hands the relevant assets to the trustee to hold and manage under the trust.

How does the trust work after you die?

The trust doesn’t spring to life the instant you pass away. It follows the normal estate administration process first, then the trustee funds and runs the trust.

What happens during estate administration and probate?

Before the trust can be funded, the executor must apply for a grant of probate, identify the assets, and pay any debts and taxes. Only then are the assets set aside for the trust. Our guide to estate administration in Queensland explains this stage in full.

What steps set the trust up in practice?

Once administration is done, the trustee typically:

1. Identifies which assets are allocated to the trust.
2. Obtains tax and accounting advice on structure.
3. Applies for a trust tax file number (TFN).
4. Opens a dedicated trust bank account.
5. Transfers the estate funds in and begins managing them.

What ongoing administration does a trustee handle?

A running trust needs upkeep. The trustee keeps accurate records, lodges an annual trust tax return where the trust earns income, and reports to beneficiaries. Under the Trusts Act 2025 (Qld), trustees must keep records for at least three years after the trust ends and give beneficiaries access to them.

Do super and life insurance go into the trust?

This is one of the most misunderstood parts of estate planning, and getting it wrong can leave your trust unfunded. Superannuation and life insurance do not automatically form part of your estate, so they don’t flow into a testamentary trust just because your will mentions one. They are dealt with separately, and only reach the trust if you deliberately direct them there.

How do superannuation death benefits reach the trust?

Your super isn’t owned by you the way your bank account is — it’s held by the fund trustee, who decides where a death benefit goes unless you’ve given a valid direction. To route your super into your testamentary trust, you generally need a valid binding death benefit nomination naming your legal personal representative (your estate). The fund then pays the benefit to your estate, and from there it can flow into the trust under your will. Without that nomination, the fund trustee may pay your super directly to a dependant, entirely outside your will and your trust.

There’s a tax dimension too. Super paid to “non-dependants” for tax purposes (such as adult children) can carry a tax component, and how the benefit is directed — via the estate into a trust, or directly — can change the outcome. Because super is often one of the largest assets a family has, this is worth getting right with advice, not left to chance.

Example: David wants his $500,000 super to support his young children through their testamentary trust. He signs a binding nomination in favour of his legal personal representative, so the fund pays his estate, and his will then channels the money into the children’s trust — where it can be taxed at their adult marginal rates.

What about life insurance payouts?

Life insurance works similarly. If the policy names an individual beneficiary, it pays that person directly and bypasses your estate and trust; if it’s directed to your estate, the trustee can manage those proceeds under the trust terms. Paying insurance into the estate can be useful for creating immediate liquidity — cash to support dependants or meet debts — while still capturing the trust’s protection and tax benefits.

What should NOT be assumed to fall into the trust?

Several assets need separate planning because they pass outside your will:

1. Jointly owned property — passes automatically to the surviving co-owner by survivorship.
2. Existing family trust assets — not personally owned by you, so not part of your estate.
3. Company assets — you can only leave the shares you personally own, not the company’s assets.
4. Foreign assets — may be governed by another country’s succession law.

The lesson is simple: a testamentary trust only works if it is actually funded. Aligning your super nominations, insurance and asset ownership with your will is as important as the trust clauses themselves — something GM Law reviews as part of your estate planning and administration services.

How much does a testamentary trust will cost?

A testamentary trust will costs more than a simple will because of the extra drafting involved, and it carries ongoing administration costs once it’s running. At GM Law, our fixed fees (excluding GST) are:

Prices are taken from our estate planning and administration services. The ongoing costs — annual tax returns and record-keeping — depend on the trust’s assets and income, so we’ll talk those through before you commit.

What disputes or risks should you watch for?

A testamentary trust reduces some risks but doesn’t remove them all. The main things to plan for are family provision claims, trustee misconduct, and family fallout that forces a trust to be wound up.

1. Family provision claims — a trust doesn’t stop an eligible person claiming; your will must still make adequate provision.
2. Trustee misconduct — beneficiaries can seek a remedy or trustee removal if a trustee acts improperly.
3. Relationship breakdown — long-running trusts can bind beneficiaries together; a fallout may force a wind-up.

What Queensland law governs testamentary trusts?

Testamentary trusts in Queensland sit at the intersection of several laws, and recent reform has changed the landscape. Wills and their administration are governed by the Succession Act 1981 (Qld), while trustees now operate under the Trusts Act 2025 (Qld), which replaced the old Trusts Act 1973. Because the trust is embedded in your will, you decide in advance which assets go in, who benefits, who acts as trustee, and how distributions are managed.

A few points are worth knowing:

1. Trustee powers and duties — under the Trusts Act 2025, trustees generally hold the powers of an absolute owner over trust property, alongside duties of care, honesty, good faith and record-keeping.
2. Who can be a trustee — a child, or a person who is insolvent under administration, cannot be appointed; an attempt to do so has no effect.
3. Advancement for minors — the 2025 Act significantly increased what a trustee can apply for a child’s maintenance, education or advancement, so school fees or a medical need can often be met without going to court.
4. How long a trust can run — for trusts established on or after 1 August 2025, the perpetuity period is up to 125 years under the Property Law Act 2023 (Qld); older trusts remain on the previous 80-year limit.

For most families the trust winds up far sooner — often when the youngest beneficiary reaches a set age. Tax is federal, not Queensland-specific, and the concessions for minors depend on Commonwealth rules that can change, so it’s wise to review your structure periodically. Because this area has moved recently, and further trust tax reform has been flagged federally, the safest course is to have your will drafted and reviewed by a Queensland estate planning lawyer who is across the current framework.

Frequently asked questions

Can a beneficiary also be the trustee?

Often yes, provided they aren’t disqualified. But for a beneficiary facing creditor or relationship risk, appointing an independent co-trustee is usually safer, because a beneficiary who solely controls their own trust may lose the asset-protection benefit.

Can I put only part of my estate into the trust?

Yes. You can direct specific assets — say an investment property or share portfolio — into the trust and leave the rest to be distributed outright.

When does the trust actually start operating?

It’s created by your will and begins operating once your executor starts administering the estate and setting assets aside for it — in practice usually after probate is granted. Until then it exists only as instructions in your will, which you can change any time you have capacity.

Can a beneficiary opt out and just take the cash?

Sometimes — it depends how the will is drafted. Many testamentary trusts are optional for capable adult beneficiaries, letting them take their share outright or run it through the trust. For minors or protected beneficiaries the trust is usually mandatory until they reach a set age. If flexibility matters to you, we can build an opt-out into the will.

Will my kids lose the main-residence CGT exemption?

Possibly, if it isn’t structured carefully. The ATO has proposed (in draft determination TD 2026/D1) that the main-residence CGT exemption for an inherited home applies only where the will grants an express right of occupation to a named person — a trustee’s general discretion to allow occupation may not qualify. It’s still a draft and under challenge, but if your home is going into a trust, get specific advice before finalising it.

Does my QLD trust still work if I move interstate?

Generally yes, but it’s worth reviewing. A validly made Queensland will and its testamentary trust are recognised across Australia, but succession and trustee laws differ between states, and moving can affect how your estate is administered. If you move interstate or overseas, or buy property elsewhere, have your will reviewed so it still does what you intend.

How big does an estate need to be to be worth it?

There’s no fixed figure, but there’s a rule of thumb. A testamentary trust tends to pay off once the estate holds enough income-producing assets that the tax savings and protection outweigh the extra setup and yearly admin costs. For a modest estate that will mostly be spent or sold, a simple will is often better value. The real test is your assets and beneficiaries, not a dollar threshold — GM Law can help you weigh it up.

Can it affect my Centrelink or age pension?

It can, so this needs care. Being a beneficiary of a testamentary trust can affect means-tested payments like the age pension, depending on your control over and access to the trust’s assets and income. For a beneficiary with disability, a properly structured special disability trust can provide support while protecting entitlements. Check with Centrelink or a financial adviser about your situation.

What stops a trustee from misusing the money?

Trustees are legally accountable. Under the Trusts Act 2025 (Qld) a trustee owes strict duties of honesty, good faith, care and record-keeping, and must act in the beneficiaries’ interests — not their own. Beneficiaries can request records, and a trustee who misuses funds can be removed and made personally liable by a court. Naming an independent co-trustee adds a further layer of oversight.

Is it the same as a family trust? Can I merge them?

No, they’re different things. A family trust is created while you’re alive and operates now; a testamentary trust is created by your will and only starts after death. You can’t simply “roll” an existing family trust into your will, because assets already held in that trust aren’t personally yours to leave — they’re owned by the trust. Instead, your will controls who takes over control of the family trust (for example, the role of appointor). This is worth planning deliberately.

One flag worth keeping in mind: a couple of these answers (the TD 2026/D1 CGT point and the Centrelink/pension one) touch on areas that are either still in draft or depend on personal circumstances, so they’re written cautiously with a “get specific advice” steer — sensible for a public legal page. Want me to also fold in that tax-flexibility bullet list from earlier, which is still not in the document?

Talk to GM Law about your testamentary trust

Whether a testamentary trust will or a simple will is right for you comes down to your assets, your family and your goals. GM Law prepares both on fixed fees and will give you straight advice on which one you actually need. Explore our estate planning and administration services or call 1300 185 636 to get started.