Testamentary Discretionary Trusts Explained: How They Work, Benefits, Risks, and When They May Be Right for Your Estate Plan
Most people think of a Will as a document that says who receives your assets when you die.
And while that is an important part of estate planning, a Will can do much more than simply name beneficiaries.
For some families, the biggest question is not only who should inherit, but also:
How should their inheritance be managed?
How can their inheritance be protected?
What happens if circumstances change in the future?
How can you support children or vulnerable beneficiaries?
How can you keep assets within your family?
A testamentary discretionary trust (“TDT”), sometimes also referred to as a testamentary trust, is one estate planning tool that can help answer these questions.
A TDT allows assets to be held and managed within a trust structure after someone’s death, rather than passing directly to beneficiaries. This can provide families with flexibility, protection, and control over how an inheritance is used.
TDTs are commonly considered by families with children, blended families, business owners, professionals, people with significant assets, or anyone who wants additional protection around their beneficiaries’ inheritance.
They are not the right solution for everyone. A TDT comes with additional complexity and administration, so it is important to understand how they work and why they may or may not suit your circumstances.
This guide explains:
What a TDT is
How TDTs work
The benefits and limitations
How they can protect assets
Potential tax advantages
How they can help families with children
Why blended families and business owners often consider them
Common questions about TDTs
What is a Testamentary Discretionary Trust?
A TDT is a trust created by a person’s Will that only begins operating after their death.
The word “testamentary” means something created through a Will or relating to a person’s death.
Unlike a family trust that someone establishes during their lifetime, a TDT does not exist while you are alive. It is created when your estate is administered.
The trust holds assets that would otherwise have passed directly to your beneficiaries.
For example:
A parent may leave their estate equally between their two young children.
Under a standard Will, those assets might pass directly to the children once they turn 18 years old.
Under a TDT structure, the assets may instead be transferred into a trust created by the Will. The trustee then manages those assets for the benefit of the children.
The children can still receive benefits from the trust, but the assets are held and managed long-term within the trust structure rather than owned personally by the children.
This distinction can provide important protection and flexibility.
What Does the Trustee Do in a Testamentary Discretionary Trust?
A TDT gives the trustee discretion about how and when trust assets are distributed among a group of eligible beneficiaries.
The trustee may have the ability to decide:
Which beneficiaries receive benefits
How much each beneficiary receives
Whether benefits are provided as income, capital, or assets
When distributions are made
This flexibility allows the trust to respond to changing family circumstances.
For example:
A parent creates a TDT for their children.
At the time of their death:
One child may be studying at university
One child may have young children of their own
One child may have financial difficulties
One child may have significant income from their career
A discretionary trust structure allows the trustee to consider those different circumstances rather than requiring assets to be divided in the same way regardless of what each child needs.
How Does a Testamentary Discretionary Trust Work?
A TDT usually involves four key stages.
Step 1: The Will Creates the Trust
The first step happens when the Will is prepared.
The Will contains provisions that establish the TDT and set out:
Who can benefit from the trust
Who can act as trustee
What powers the trustee has
How the trust operates
When the trust may end
The trust does not operate during the person’s lifetime.
It is simply a set of instructions contained within the Will that takes effect after death.
Step 2: Assets Are Transferred Into the Trust
When the person dies, their estate is administered.
If the Will directs certain assets into a TDT, those assets are transferred into the trust rather than distributed directly to beneficiaries.
Assets that may be held within a TDT can include:
Cash
Investment portfolios
Shares
Real estate
Business interests
Other valuable assets
The trust then becomes the owner of those assets.
The beneficiaries do not personally own the trust assets. Instead, they may receive benefits from the trust according to the trust terms.
Step 3: A Trustee Manages the Assets
Every trust requires a trustee.
The trustee is responsible for managing the trust assets and making decisions for the benefit of the beneficiaries.
A trustee’s responsibilities may include:
Investing trust assets
Managing property
Considering beneficiary requests
Making distributions
Keeping appropriate records
Meeting taxation and administrative obligations
Choosing the right trustee is an important decision when creating a TDT.
The trustee needs to be someone who understands their responsibilities and can make decisions in the best interests of the beneficiaries.
Depending on the circumstances, the trustee may be:
Your spouse
A trusted family member or friend
Multiple trustees acting together
A professional trustee company
A trustee may be a beneficiary of the TDT, but it’s not a requirement.
Step 4: Beneficiaries Receive Benefits
Although beneficiaries do not personally own the trust assets, they can receive benefits from the trust.
These benefits may include:
Money for education
Support with living expenses
Money for medical expenses
Assistance purchasing property
Income distributions
Capital distributions
The trustee manages these decisions based on the terms of the trust and the circumstances of the beneficiaries.
This allows the inheritance to be managed over time rather than being transferred as a lump sum immediately or in one transaction.
Testamentary Discretionary Trust Example
Consider a couple, Sarah and Michael.
They have:
A family home
Superannuation
Investments
Two children aged 8 and 11
They want their children to inherit their estate, but they are concerned about what could happen if something happened to both parents while their children were young.
A standard Will might leave everything directly to the children once they reach a nominated age.
A TDT could instead provide:
The children’s inheritance is held within the trust
A trusted person manages the assets
Money can be used for education, healthcare, and living expenses
The trustee can consider each child’s circumstances
The inheritance is protected within the trust structure
The children still benefit from their inheritance, but the assets are managed with greater flexibility.
This is one of the reasons TDTs are commonly considered by parents with young children.
Testamentary Discretionary Trusts and Lifetime Family Trusts
One common question is whether a TDT is the same as a family trust.
They are different.
A family trust is usually created during a person’s lifetime and may be used to hold assets, manage investments or operate a business structure.
A TDT is created through a Will and only begins after death.
Both structures involve trusts, trustees and beneficiaries, but they serve different purposes.
For many families, a TDT forms part of a broader estate plan that considers both lifetime protection and what happens after death.
Advantages of Testamentary Discretionary Trusts
A testamentary discretionary trust (“TDT”) can provide families with a level of flexibility and protection that is not available through a standard Will.
The biggest difference is that assets are not simply handed directly to beneficiaries. Instead, they are held within a trust structure and managed by a trustee for the benefit of the people you choose.
This can be particularly valuable where your family circumstances are complex, your beneficiaries are young, there are concerns about asset protection, or you want your inheritance to provide support over a longer period of time.
Some of the key advantages of a TDT include:
Asset protection
Flexibility for changing family circumstances
Protection for children and future generations
Potential taxation benefits
Protection in blended families
Support for business owners and professionals
Greater control over how an inheritance is managed
1. Asset Protection Through a Testamentary Discretionary Trust
One of the most common reasons people consider a TDT is to provide additional protection around their beneficiaries’ inheritance.
When assets pass directly to a person, those assets become part of their personal financial position. This means they may be exposed to risks that arise during that person’s lifetime.
A TDT can provide a layer of separation between the inherited assets and the beneficiary personally.
Every family’s circumstances are different, but examples where a TDT may provide additional protection include:
A beneficiary going through a relationship breakdown
A beneficiary working in a high-risk profession
A beneficiary running their own business
A beneficiary who struggles with managing money
A beneficiary who may be vulnerable to financial pressure from others
Protecting an Inheritance During Relationship Breakdown
Many parents spend years building wealth with the hope that it will support their children and future grandchildren.
A concern some parents have is what happens if their child receives a significant inheritance and later separates from their partner.
Assets received during a relationship can become relevant when property is divided following separation.
A TDT may help provide additional protection because the inherited assets are held within a trust structure rather than owned directly by the beneficiary.
For example:
Margaret and John have two adult children. They own their family home, investment property, and shares.
They want their children to benefit from their estate, but they are concerned that a future relationship breakdown could result in family wealth leaving the bloodline.
A TDT allows the inheritance to be managed within a trust structure. The trustee can provide benefits to their children while keeping the underlying assets separate from direct personal ownership.
A TDT does not provide an absolute guarantee that assets will never be considered in family law proceedings. The circumstances of each relationship and the way the trust is managed will be relevant.
However, careful estate planning can provide an additional layer of protection.
Protecting Beneficiaries From Creditor Risks
For business owners, professionals, and people who work in industries with higher financial risk, asset protection is often an important consideration.
If a beneficiary personally owns inherited assets, those assets may be exposed to claims against them.
For example:
An adult child is a self-employed financial advisor.
That child inherits $1 million.
If the business later fails, personally owned assets may be at risk.
A TDT can allow the inheritance to remain within a trust structure, providing greater separation between the beneficiary and the assets.
Protecting Vulnerable Beneficiaries
Some beneficiaries may need additional support managing an inheritance.
This could include a person who:
Has difficulty managing finances
Is vulnerable to financial exploitation
Has an intellectual disability
Receives government benefits
Requires ongoing care and support
A TDT can allow a trusted person to manage assets while ensuring the beneficiary continues to receive support.
For example:
A parent has an adult child who is capable of making many decisions independently but would struggle to manage a large inheritance.
Rather than leaving a lump sum directly to that child, the parent establishes a TDT.
The trustee can use trust assets to support the child’s needs while providing oversight and protection.
2. Flexibility for Changing Family Circumstances
One of the greatest strengths of a testamentary discretionary trust is flexibility.
When creating a Will, it is impossible to know exactly what the future will look like.
Your children may:
Have different financial circumstances
Start businesses
Experience relationship breakdowns
Develop health issues
Have their own children
Need different levels of support
A standard Will generally operates based on the circumstances that exist when the Will is created.
A TDT gives the trustee the ability to respond to changing circumstances after your death.
For example:
A parent may want their children to share equally in their estate.
Years later, one child may be financially secure, another may be raising young children, and another may have experienced financial hardship.
A TDT allows the trustee to consider those circumstances when deciding how trust assets should be used.
3. Testamentary Discretionary Trusts for Children
Parents with young children are one of the groups who most commonly consider a TDT.
Many parents spend time thinking about who would care for their children if something happened to them.
A complete estate plan also needs to consider:
Who manages their assets?
How much should children receive?
At what age should they receive control?
How can their inheritance be protected?
Many parents do not feel comfortable with a child receiving a significant inheritance at 18.
While 18 is legally an adult age, it may not always align with financial maturity.
A TDT can allow assets to be managed for children while they are growing up and into adulthood.
The trustee may use trust assets for:
Education expenses
Medical costs
Housing support
Everyday living expenses
Important life events
Example: Parents With Young Children
Sarah and Michael are in their late 30’s.
They have:
Two primary school aged children
A family home
Superannuation
Life insurance
Savings
A small investment portfolio
Their biggest concern is not simply leaving money to their children.
They want to know:
Who will manage the money?
How will it be protected?
How will their children be supported if both parents die?
A TDT allows Sarah and Michael to create a structure where their children’s inheritance can be managed by a trusted person rather than automatically transferred directly to them.
The trustee can make decisions based on what each child needs at different stages of life.
4. Potential Tax Benefits of a Testamentary Discretionary Trust
Tax is often discussed as a reason people consider a testamentary discretionary trust.
A TDT may provide taxation advantages because income generated by trust assets can potentially be distributed among eligible beneficiaries.
The ability to distribute income flexibly can allow a trustee to consider the individual tax circumstances of beneficiaries.
Historically, one of the key benefits of TDTs has been that minors receiving certain types of income from a testamentary trust could access adult tax rates rather than the higher tax rates that normally apply to children.
However, taxation laws change over time and the tax benefits of a TDT should not be considered in isolation.
A well-designed estate plan considers:
Asset protection
Family circumstances
Beneficiary needs
Long-term flexibility
Tax outcomes
Tax advice may be appropriate depending on your circumstances.
5. Testamentary Discretionary Trusts for Blended Families
Blended families often have more complex estate planning needs.
A person may want to provide for:
Their spouse or partner
Children from a previous relationship
Children of their current relationship
Stepchildren
Future generations
A standard Will may not always provide the level of protection and flexibility needed.
A TDT can help structure an inheritance in a way that considers multiple family relationships.
For example:
A person remarries later in life and has children from their first marriage.
They want their spouse to be supported, but they also want to ensure their children ultimately receive their share of the family wealth.
A carefully drafted TDT can provide options for managing those competing needs.
The trustee can manage assets for the benefit of the appropriate beneficiaries while following the wishes expressed in the Will.
6. Testamentary Discretionary Trusts for Business Owners
Business owners often have additional estate planning considerations.
A business may represent a significant portion of a person’s wealth.
Questions may include:
Who should control the business?
Who should benefit from its value?
What happens if children are not involved in the business?
How can the business support the family after death?
A TDT may form part of a broader business succession plan.
For example:
A carpenter owns a successful building business. His spouse relies on the income generated from the business and they have two teenage children.
The children may eventually want to pursue different careers.
Rather than simply leaving business assets directly to the children, his estate plan can consider how the business value should be managed and how his family should be supported.
A TDT may provide flexibility around managing investments or other assets connected to the estate.
Business succession requires careful planning and may involve additional structures outside the Will.
Potential Limitations of Testamentary Discretionary Trusts
A testamentary discretionary trust can be a powerful estate planning tool, but it is not the right solution for every person or every family.
Like any legal structure, a TDT comes with advantages and disadvantages.
Before deciding whether a TDT is appropriate, it is important to understand the additional complexity, responsibilities and costs involved, and to obtain legal advice for your specific circumstances. This article is general information only and is not legal advice.
1. Testamentary Discretionary Trusts Are More Complex Than a Standard Will
A standard Will can be relatively straightforward.
It generally sets out:
Who controls your estate administration
Who your beneficiaries are
What they receive
A testamentary discretionary trust involves additional provisions and decision-making.
A properly drafted TDT needs to consider:
The trust terms
The trustee’s powers
The beneficiaries who may benefit
How assets are managed
How distributions can be made
How the trust may operate over time
This additional complexity is intentional. The purpose of a TDT is to provide greater flexibility and protection.
However, it means careful drafting is required to ensure the trust operates as intended.
2. There Are Additional Costs
A testamentary discretionary trust generally involves a higher upfront estate planning cost than a basic Will.
This reflects the additional work involved in:
Preparing detailed trust provisions
Considering family circumstances
Structuring beneficiary classes
Additional advice on the workings of the trust
Ensuring the documents work together properly
There may also be ongoing costs after death.
Depending on the assets held within the trust, these may include:
Accounting fees
Tax return preparation
Trust administration costs
Professional trustee fees, if applicable
For families with simple circumstances and modest assets, the additional cost and complexity may not provide enough benefit.
The decision should be based on the family’s circumstances, not simply the size of the estate.
3. A Trustee Has Ongoing Responsibilities
A TDT requires someone to act as trustee.
Being a trustee is a responsibility, not simply a title.
The trustee must act in accordance with the trust terms and in the best interests of the beneficiaries.
Responsibilities may include:
Making thoughtful considered decisions about distributions
Managing investments
Keeping records
Maintaining financial accounts
Obtaining professional advice where needed
Choosing the right trustee is an important part of the estate planning process.
The person who is good at managing money is not always the person who is best suited to making decisions for your family.
Some people choose:
A family member
A trusted friend
Multiple trustees
A professional trustee company
The right choice depends on the family dynamics and the complexity of the estate.
4. Beneficiaries Do Not Personally Own the Trust Assets
A key feature of a testamentary discretionary trust is that the beneficiaries do not personally own the assets held within the trust.
Instead, the trustee controls the trust assets and decides how they are managed and distributed.
For some families, this is exactly the protection they are looking for.
For others, direct ownership may be more appropriate.
For example:
A person may prefer their adult child to receive a specific investment property directly.
A TDT may not align with that intention if the goal is for the child to have complete personal ownership and control.
Estate planning is about matching the structure to the family’s goals.
5. A Testamentary Discretionary Trust Requires Administration
A TDT is not something that can simply be created and forgotten.
Depending on the circumstances, the trust may require:
Financial records
Tax returns
Trustee resolutions
Professional advice
Ongoing review
This administration is part of maintaining the protections and benefits of the structure.
Families considering a TDT should understand that the structure requires ongoing attention.
When Might a Testamentary Discretionary Trust Not Be Suitable?
A TDT may not be necessary where:
The estate is relatively simple
There are no concerns about asset protection
There are no children or vulnerable beneficiaries
The family circumstances are straightforward
For example:
A person with no dependants, limited assets and a simple distribution plan may not receive meaningful benefits from establishing a TDT.
The goal of estate planning is not to include every possible structure. It is to create the right plan for your circumstances.
Common Testamentary Discretionary Trust Misconceptions
“Testamentary Discretionary Trusts Are Only for Wealthy Families”
This is one of the most common misconceptions.
A TDT is often associated with wealthy families because it can be useful for protecting significant assets.
However, the reason many families consider a TDT is not simply the value of their estate.
It is about the people they are leaving behind.
A family with a home, superannuation, life insurance and young children may have a strong reason to consider a TDT, even if they do not consider themselves wealthy.
For many families, their biggest asset is the future financial security they want to provide for their children.
“My Children Can Just Receive Their Inheritance When They Turn 18”
Legally, a person becomes an adult at 18.
Financial maturity is different.
Receiving a large inheritance at 18 may create challenges.
A young adult may be dealing with:
University
First relationships
Limited financial experience
Pressure from others
Major financial decisions
A TDT allows parents to create a structure that provides support while allowing assets to be managed responsibly.
“A Testamentary Discretionary Trust Means My Children Cannot Access Their Money”
This is not how a TDT works.
The purpose of a TDT is not to prevent beneficiaries from benefiting from their inheritance.
The purpose is to provide a framework for managing that inheritance.
A trustee can use trust assets for beneficiaries’ benefit, including education, housing, healthcare, and other needs.
“A Testamentary Discretionary Trust Avoids All Tax”
A TDT can provide potential tax benefits, but it does not mean all income is tax-free.
The tax treatment depends on:
The type of income
The beneficiaries
Current taxation laws
How the trust is administered
Tax should be one consideration within an overall estate plan.
“I Can Set Up a Testamentary Discretionary Trust After I Die”
A TDT must generally be created through your Will.
If your Will does not contain appropriate provisions, your executor usually cannot simply decide after your death to create one.
This is why reviewing your Will while you are alive is important.
Testamentary Discretionary Trust Case Studies
Case Study 1: Protecting Young Children’s Inheritance
The family
Tom and Jess are both 35 years old.
They have:
Two children aged 5 and 8
A family home
Superannuation
Life insurance
Savings
Their biggest concern is making sure their children are cared for if both parents die.
They do not want their children receiving a significant inheritance directly at 18.
The estate planning solution
Their Will includes a testamentary discretionary trust.
If both parents die:
Their children’s inheritance is held within the TDT
A chosen trustee manages the assets
The trustee can provide financial support as needed
Assets remain protected within the trust structure
The trust provides a framework to support the children through childhood, education, and adulthood.
Case Study 2: Protecting Family Wealth in a Blended Family
The family
Karen and Mark married later in life.
Karen has two children from her first marriage.
They want to provide for each other while also protecting their children’s future inheritance.
The estate planning solution
Their estate plan considers how assets should be managed after the first person dies.
A TDT can provide flexibility around supporting the surviving spouse while preserving benefits for children.
This type of planning requires careful drafting because blended families often involve competing interests and different expectations.
Case Study 3: Business Owner With Young Family
The family
Luke owns an electrical contracting business.
His business provides the main source of income for his family.
He and his partner have three children.
His concerns include:
Protecting his family financially
Ensuring business value is managed appropriately
Providing for children who may not work in the business
The estate planning solution
A TDT forms part of a broader estate plan that considers:
Business succession
Ownership structures
Family support
Long-term asset protection
The right approach depends on the business structure and personal circumstances.
Testamentary Discretionary Trust FAQs
What is a Testamentary Discretionary Trust?
A testamentary discretionary trust is a trust created through a person’s Will that begins after their death.
It allows assets to be held and managed by a trustee for the benefit of chosen beneficiaries.
How does a Testamentary Discretionary Trust work?
A TDT is created through your Will.
After your death, assets allocated to the trust are transferred into the trust structure.
The trustee manages those assets and makes decisions about providing benefits to beneficiaries.
Who can benefit from a Testamentary Discretionary Trust?
The beneficiaries depend on the terms of the Will.
A TDT may include:
Children
Grandchildren
Spouse or partner
Other family members
The beneficiary class should be carefully considered when preparing the estate plan.
Who controls a Testamentary Discretionary Trust?
The trustee controls the trust.
The trustee manages the assets and makes decisions about distributions in accordance with the trust terms.
Choosing the right trustee is an important estate planning decision.
Can my children be trustees of their own Testamentary Discretionary Trust?
This depends on the terms of the trust and the circumstances.
Some people allow adult children to become trustees of their own trust. Other families prefer an independent trustee arrangement.
Can a Testamentary Discretionary Trust protect assets from divorce?
A TDT may provide additional protection because assets are held within a trust structure rather than directly owned by a beneficiary.
However, family law courts can consider a range of factors when determining property settlements.
Professional advice should be obtained based on the specific circumstances.
Can a Testamentary Discretionary Trust protect assets from creditors?
A TDT may provide protection where assets remain held within the trust structure.
The level of protection depends on factors including the beneficiary’s circumstances and how the trust is managed.
How long does a Testamentary Discretionary Trust last?
The duration depends on the terms of the trust and applicable legislation.
Many TDTs are designed to operate for many years, particularly where the goal is to support children and future generations.
Do Testamentary Discretionary Trusts save tax?
A TDT may provide tax advantages in certain circumstances.
However, tax outcomes depend on individual circumstances and current taxation laws.
A TDT should be created because it achieves the right estate planning outcomes, with taxation considered as part of that decision.
Do I need a Testamentary Discretionary Trust?
Whether you need a TDT depends on your family circumstances, assets and goals.
It may be worth considering if you:
Have young children
Have significant assets
Own a business
Have a blended family
Want additional asset protection
Please seek legal advice to determine whether a TDT is appropriate for your situation.
Final Thoughts
A testamentary discretionary trust is one of the most flexible tools available in estate planning.
It allows families to think beyond simply who receives assets and consider how those assets should be managed and protected.
For parents, it can provide reassurance that children will be supported.
For blended families, it can provide options for balancing competing needs.
For business owners and professionals, it can form part of a broader asset protection strategy.
A TDT is not necessary for every estate, but for the right family it can provide valuable flexibility and protection for future generations.
The most effective estate plans are designed around people, not just assets.