A testamentary trust is one of the most powerful estate planning tools available to Australian families. This guide explains what they are, when you need one, and how they can protect your beneficiaries and save significant tax.
Quick Answer
A testamentary trust is created by your will and comes into existence when you die, holding and managing assets for your beneficiaries according to terms you set. It offers three main benefits: tax savings, asset protection, and control over how inheritance is distributed.
- Tax savings: Income distributed to minor children is taxed at adult marginal rates (tax-free up to $18,200) instead of penalty rates.
- Asset protection: Inheritance is held in trust, harder for a beneficiary's creditors, bankruptcy, or divorce to reach.
- Control: You set vesting ages and trustee discretion to decide when and how beneficiaries receive their inheritance.
- Most valuable for: Families with minor children or estates over $500,000, where tax savings often exceed the added cost.
What Is a Testamentary Trust?
A testamentary trust is a trust established by your will that comes into existence when you die. Key characteristics:
| Feature | Testamentary Trust |
|---|---|
| Created by | Your will |
| When established | Upon your death (after probate) |
| Managed by | Trustee you appoint |
| Beneficiaries | People you specify |
| Duration | Until you specify (often 18-80 years) |
| Assets held | Your estate assets |
Simple Definition: Instead of giving assets directly to beneficiaries, you give them to a trust, which holds and manages the assets for the beneficiaries' benefit according to rules you set.
Why Use a Testamentary Trust?
Three Main Benefits
| Benefit | How It Works | Who Benefits |
|---|---|---|
| Tax savings | Minor beneficiaries taxed at adult rates | Families with children |
| Asset protection | Assets protected from creditors, divorce | All beneficiaries |
| Control | You decide when/how assets distributed | Young beneficiaries, vulnerable beneficiaries |
Tax Benefits Explained
Key point
Income distributed to minor children through a testamentary trust is taxed at adult marginal rates, so each child can receive up to $18,200 tax-free instead of facing penalty rates that start at $416.
The Minor Beneficiary Advantage
Normally, income earned by minors from unearned sources is taxed at penalty rates:
| Income | Normal Tax for Minors |
|---|---|
| $0 - $416 | 0% |
| $417 - $1,307 | 66% |
| $1,308+ | 45% |
But income from a testamentary trust is taxed at adult marginal rates:
| Income | Testamentary Trust Rate |
|---|---|
| $0 - $18,200 | 0% |
| $18,201 - $45,000 | 19% |
| $45,001 - $120,000 | 32.5% |
Worked Example: The Tax Savings
The Williams family has 3 children (ages 8, 12, 15). Their parents' estate generates $60,000 per year in investment income.
| Scenario | Tax Paid |
|---|---|
| Without testamentary trust (income to one adult) | ~$14,000 |
| With testamentary trust (split among 3 children) | ~$0 |
| Annual saving | ~$14,000 |
Over 10 years until the youngest turns 18, that's $140,000+ in tax saved.
How Income Splitting Works
| Structure | Tax Result |
|---|---|
| One beneficiary | One tax-free threshold ($18,200) |
| Three beneficiaries | Three thresholds ($54,600 tax-free) |
| Mix of adults and children | Each gets their own threshold |
Asset Protection Benefits
What a Testamentary Trust Protects Against
| Threat | How Trust Protects |
|---|---|
| Beneficiary's divorce | Assets in trust, not beneficiary's name, harder for ex-spouse to claim |
| Beneficiary's bankruptcy | Trustee controls assets, not the bankrupt beneficiary |
| Poor money decisions | Beneficiary can't spend trust capital unwisely |
| Predators and manipulators | Trustee provides oversight on distributions |
| Future lawsuits | Assets held in trust, not personally |
How Strong Is the Protection?
| Scenario | Protection Level |
|---|---|
| Beneficiary's personal debt | Strong, creditors can't easily access trust |
| Beneficiary's divorce | Moderate to strong, depends on involvement |
| Family provision claim | Limited, trust assets may still be claimed |
| Beneficiary's bankruptcy | Strong, if properly structured |
Important: Asset protection is not absolute. Courts can "look through" trusts in some circumstances, particularly if the beneficiary has significant control.
Control Over Distribution
Setting Vesting Ages
Instead of beneficiaries receiving everything at 18, you can specify:
| Option | Structure |
|---|---|
| Single age | Everything at 25 (or any age you choose) |
| Staged | 25% at 21, 50% at 25, remainder at 30 |
| Milestone-based | Portions released on completion of education, steady employment, etc. |
| Lifetime | Never vests, trustee manages forever (special needs) |
Trustee Discretion
You can give trustees power to:
- Make early distributions for specific purposes (education, home deposit)
- Withhold distributions if beneficiary has addiction or financial problems
- Adjust distributions based on beneficiaries' needs
- Invest conservatively or aggressively based on circumstances
When Do You Need a Testamentary Trust?
Key point
A testamentary trust is most valuable for families with minor children or estates over $500,000, where the tax savings typically exceed the added setup and ongoing costs.
Strongly Recommended
| Situation | Why |
|---|---|
| Minor children | Tax benefits + protection until mature |
| Estate over $500,000 | Tax savings likely exceed costs |
| Beneficiary with disability | Lifetime management, Centrelink protection |
| Concerns about beneficiary's spouse | Divorce protection |
| Beneficiary with addiction | Controlled distributions |
| Blended family | Protect children from different relationships |
May Be Worth Considering
| Situation | Why |
|---|---|
| Estate $300,000-$500,000 | Benefits may outweigh costs |
| Adult children who are good with money | Still provides some tax benefits |
| Potential family provision claims | May offer some protection |
Probably Not Needed
| Situation | Why |
|---|---|
| Estate under $300,000 | Administration costs may exceed benefits |
| Simple estate, adult children | Direct inheritance is simpler |
| No tax planning opportunity | Limited income-producing assets |
Types of Testamentary Trusts
Discretionary Testamentary Trust
Most common type. Trustee has discretion over distributions.
| Feature | Detail |
|---|---|
| Flexibility | High, trustee decides who gets what, when |
| Tax planning | Excellent, income can be split among beneficiaries |
| Asset protection | Good, beneficiaries don't "own" assets |
| Complexity | Moderate, requires trustee to make decisions |
Protective Testamentary Trust
Specifically designed for vulnerable beneficiaries.
| Feature | Detail |
|---|---|
| Purpose | Protect beneficiaries with disability, addiction, poor judgment |
| Control | High, trustee has significant control |
| Centrelink | Can be structured to preserve benefits |
| Duration | Often lifetime |
Capital Reserved Trust
Capital preserved, only income distributed.
| Feature | Detail |
|---|---|
| Purpose | Preserve wealth across generations |
| Distribution | Income only, capital stays in trust |
| Best for | Very large estates, generational wealth |
Costs of Testamentary Trusts
Setup Costs
| Component | Typical Cost |
|---|---|
| Will with testamentary trust provisions | $2,000-$5,000 |
| Complex trust structures | $5,000-$10,000+ |
| Simple will (comparison) | $300-$800 |
Ongoing Costs (After Your Death)
| Annual Cost | Amount |
|---|---|
| Trust tax return | $500-$1,500 |
| Trustee administration | $500-$2,000 |
| Professional trustee (if used) | 0.5%-1.5% of assets |
| Investment management | Variable |
Cost-Benefit Analysis
| Estate Size | Potential Annual Tax Saving | Annual Costs | Net Benefit |
|---|---|---|---|
| $300,000 | ~$3,000 | ~$1,500 | ~$1,500 |
| $500,000 | ~$5,000 | ~$2,000 | ~$3,000 |
| $1,000,000 | ~$10,000+ | ~$3,000 | ~$7,000+ |
Choosing a Trustee
Trustee Options
| Option | Pros | Cons |
|---|---|---|
| Family member | Knows family, no fees | May lack expertise, conflicts |
| Professional trustee company | Expert, impartial | Fees (0.5-1.5%/year) |
| Public Trustee | Government-backed, affordable | Less flexible |
| Combination | Balance expertise and family | Complexity |
Trustee Responsibilities
| Duty | What It Means |
|---|---|
| Act in beneficiaries' interests | Every decision prioritises beneficiaries |
| Invest prudently | Balanced, appropriate investments |
| Keep records | Document all transactions |
| Distribute appropriately | Follow trust terms |
| File tax returns | Annual trust tax return |
Setting Up a Testamentary Trust
Process Overview
- Consult an estate planning lawyer (this is too complex for DIY)
- Discuss your goals (who benefits, when, how)
- Draft the trust provisions in your will
- Choose trustees (and discuss with them)
- Execute the will with proper witnessing
- Review periodically (every 3-5 years)
What to Discuss with Your Lawyer
- Who should be beneficiaries (primary and secondary)
- When should beneficiaries receive capital (vesting ages)
- Who should be trustee (and alternates)
- What powers should trustee have
- How should income be distributed
- What happens if beneficiary dies
Testamentary Trust vs Other Options
| Feature | Testamentary Trust | Direct Gift | Family Trust |
|---|---|---|---|
| Created | At death | At death | During lifetime |
| Minor tax benefits | Yes (adult rates) | No | No |
| Asset protection | Yes | No | Yes |
| Control after death | Yes | No | Depends |
| Setup cost | Higher | Lower | Higher |
| Ongoing costs | Yes | No | Yes |
| Flexibility | High | None | High |
State-Specific Considerations
Testamentary trusts are governed by the will (state law) but taxation is federal. Key points:
| Aspect | Jurisdiction |
|---|---|
| Trust creation | State succession law |
| Trust administration | State trustee law |
| Taxation | Federal (Income Tax Assessment Act) |
| Stamp duty | May apply on certain transfers (varies by state) |
Legislation and Official Resources
Will-making in Australia is governed by each state and territory's own succession legislation. The core statutes include:
- New South Wales: Succession Act 2006 (NSW)
- Victoria: Wills Act 1997 (Vic)
- Queensland: Succession Act 1981 (Qld)
- South Australia: Succession Act 2023 (SA)
- Western Australia: Wills Act 1970 (WA)
- Tasmania: Wills Act 2008 (Tas)
- Australian Capital Territory: Wills Act 1968 (ACT)
- Northern Territory: Wills Act 2000 (NT)
Because requirements differ between states and are amended over time, always confirm the current rules for your state, or seek advice from a qualified legal professional.
Related Guides
- Minor Children and Guardianship in Wills – Trusts for children
- Superannuation and Your Will – Super flowing into trusts
- Blended Family Will Planning – Trusts in complex families
- Disability and Special Needs Will Planning – Protective trusts
- Lawyer Will Cost Australia – Cost of professional will with trust
Is a Testamentary Trust Right for You?
Testamentary trusts offer significant benefits but add complexity and cost. They're most valuable when:
- You have minor children who will inherit significant assets
- Your estate generates ongoing income
- You have concerns about beneficiaries' ability to manage money
- You want to protect inheritance from divorce or creditors
- You have a beneficiary with special needs
For most Australian families with estates over $500,000 and minor children, the tax savings alone justify the additional cost.
Reviewed and current as at 12 June 2026.
This article is general information only and is not legal advice. Laws change over time and vary between Australian states and territories, so always confirm the current position and consider advice from a qualified legal professional for your specific circumstances.