Government Backflip on Testamentary Discretionary Trusts: What It Means for Your Estate Planning and Generational Wealth

How the Post-Budget Reversal Restored the Ultimate Safe Haven for Family Investors Under the New Trust Tax Rules

The Federal Budget’s trust crackdown landed like a sledgehammer for everyone from new investors to high-net-worth families. To many Australians, it almost felt like creating any form of discretionary trust—including a testamentary discretionary trust—had suddenly become a tax planning sin.

When Treasury announced a new 30% minimum tax on discretionary trust distributions from 1 July 2028, the message appeared crystal clear: the golden age of discretionary trust tax planning was coming to an end. For decades, Australian families, investors and business owners have used discretionary trusts to distribute income across family groups and legally manage their overall tax position. Suddenly, one of Australia’s most powerful wealth-building structures appeared to be under direct attack.

However, following significant industry feedback and growing concerns from investors, advisers and estate planning professionals, Treasury executed a dramatic post-Budget backflip. While ordinary discretionary trusts remain firmly in the firing line, Treasury has now confirmed that genuine discretionary testamentary trusts will be exempt from the proposed 30% minimum tax regime.

For families looking to protect assets, preserve wealth across generations and maintain flexibility after death, this is a significant development. Testamentary trusts may have gone from being a specialist estate planning tool to one of the most strategically important structures left standing under the proposed trust reforms.

The question is no longer whether testamentary trusts survived the reforms—it is whether Treasury has inadvertently made them more valuable than ever.

The 2026 Trust Clampdown: Why Standard Family Trusts Lost Their Appeal

For decades, the standard family discretionary trust was the undisputed king of asset protection and tax flexibility. It allowed business owners and investors to distribute trading profits or investment income across family groups, often resulting in a lower overall tax outcome while simultaneously providing strong asset protection benefits.

The proposed rules fundamentally change that equation. From 1 July 2028, discretionary trusts will become subject to a new 30% minimum tax regime at the trustee level. While beneficiaries will generally receive tax credits for tax paid by the trustee, the reforms substantially reduce the ability of family groups to access the benefit of lower marginal tax rates and tax-free thresholds that have historically made discretionary trusts so attractive.

The practical result is that the traditional family trust may continue to play an important role in asset protection, succession planning and wealth preservation. However, its long-standing reputation as one of Australia’s most flexible tax-planning structures has been significantly weakened under the proposed framework.

Back to Basics: Standard Family Trusts vs Testamentary Discretionary Trusts (TDTs)

To understand why the Government’s recent policy shift is such an important development for family investors, it is essential to separate the two trust structures at the centre of this debate. While both sit under the broad umbrella of discretionary trusts, they serve very different purposes and are now being treated very differently under the proposed reforms.

• Inter Vivos Discretionary Trust (Standard Family Trust): Established while you are alive (inter vivos), this trust allows business owners and investors to distribute business profits or investment income amongst family members each year. Because it is an active, lifetime vehicle used for ongoing income distribution, it has become one of the primary targets of the proposed 30% minimum trustee tax regime.
• Discretionary Testamentary Trust (TDT): Unlike a standard family trust, a testamentary discretionary trust cannot operate while you are alive. It is created within the terms of your Will and remains completely dormant until your death. At that point, selected assets from your estate pass into the trust rather than directly into the personal names of your beneficiaries, creating a protective legal structure for future generations.

By keeping the trust discretionary, the trustee retains the flexibility to distribute future investment income amongst children, grandchildren and other beneficiaries as circumstances change over time. Following the original Budget announcements, many estate planning professionals were concerned that this flexibility could also be caught by the proposed 30% trustee tax regime. Treasury’s latest clarification has significantly eased those concerns.

As a result, the distinction between a standard family trust and a testamentary discretionary trust has become more important than ever. One remains firmly within the scope of the proposed reforms, while the other has been specifically carved out, provided it is established for genuine testamentary purposes.

The Testamentary Trust Victory: Understanding the Government’s Reversal

Following significant industry pushback and growing concern from family investors, advisers and estate planning professionals, Treasury has substantially softened its position on testamentary trusts. The updated Treasury guidance now confirms that genuine discretionary testamentary trusts will be exempt from the proposed 30% minimum trustee tax regime.

This is a significant departure from the uncertainty created by the original Budget materials. Treasury is now effectively drawing a distinction between ordinary discretionary trusts used during a person’s lifetime and testamentary discretionary trusts established through a Will as part of a genuine estate planning strategy.

Importantly, Treasury has already confirmed several key principles:

• Genuine discretionary testamentary trusts are intended to remain outside the proposed 30% minimum tax regime.
• The exemption is not limited only to testamentary trusts already in existence at Budget night. Treasury’s updated wording refers broadly to genuine discretionary testamentary trusts.
• For testamentary trusts established on or after 1 July 2028, the exemption will only apply where the trust benefits individuals and income-tax-exempt entities, such as registered charities.
• Treasury has also indicated that special integrity rules will apply to assets that are unrelated to the deceased estate.

However, several important questions remain unanswered.

Treasury has not yet explained how the rules will apply where a testamentary trust is drafted today but only comes into existence many years into the future following a death. Likewise, the Treasury note does not fully explain how the integrity measures will operate where estate assets and non-estate assets become mixed within the same testamentary trust structure. 

In our view, the broad policy direction is now clear: genuine testamentary discretionary trusts have survived the trust reforms and remain one of Australia’s most powerful estate planning structures. What remains unclear is precisely where Treasury intends to draw the line between legitimate estate planning and arrangements it considers to be extending beyond the original deceased estate. That answer will ultimately depend on the final legislation.

The $18,200 Tax Miracle: Safeguarding Children, Grandchildren, and Vulnerable Dependents

The reason the Government’s backflip is such a monumental victory for family investors comes down to a unique, highly lucrative tax rule: Excepted Trust Income.

Under a standard family trust, distributing income to minor children or grandchildren under the age of 18 is virtually impossible from a tax perspective. The law penalizes these distributions with harsh penalty tax rates of up to 47% on any amount over $416. This was designed to stop families from splitting income through minors during their lifetime.

However, a genuine Testamentary Discretionary Trust turns this rule completely on its head. When income is generated from assets passed down through a Will, minor beneficiaries are legally treated as adults for tax purposes.

This means every single child, grandchild, or minor dependent gains access to the full $18,200 annual tax-free threshold. A testamentary trust does not create a single tax-free threshold. It potentially creates an entire family of tax-free thresholds.

The Generational Math in Action: Imagine a grandparent passes away, leaving a high-yielding property portfolio or investment fund that generates $54,000 in income per year.

• Under the proposed 2028 rules in a standard family trust: The trustee would be hit with a mandatory 30% tax floor, immediately wiping out $16,200 right off the top.
• Under a Testamentary Trust: The trustee can dynamically split that $54,000 equally among three minor grandchildren ($18,000 each). Because they each have a $18,200 tax-free threshold, the entire $54,000 is distributed completely tax-free. That is an annual saving of over $16,000 kept entirely within the family.

This mechanism becomes even more critical when planning for vulnerable beneficiaries or next-gen family members with a disability. Rather than handing control of massive capital directly to a vulnerable dependent—which exposes them to external financial risks, mismanagement, or litigation—the wealth stays securely locked inside the TDT bunker. The trust can generate a highly optimized, tax-sheltered income stream to pay directly for their care, education, medical needs, and lifestyle, entirely insulated from the outside world.

Final Thoughts: Testamentary Trusts and Generational Wealth Planning

The dust has now settled on Treasury’s latest trust announcement, and the message is becoming clearer. While ordinary discretionary trusts face a very different future, genuine Testamentary Discretionary Trusts remain one of the most powerful tools available for protecting family wealth and supporting future generations.

However, the final legislation is still to come, and the detail will matter. If you would like to review your Will, estate plan or family wealth structure in light of the proposed reforms, contact Investax Sydney or Camden Professionals Perth to arrange a Strategic Tax Consultation (STC).

Frequently Asked Questions (FAQs)

1. What is the difference between a standard family trust and a testamentary trust?
An ordinary family trust, also known as an inter vivos trust, is established and operates while you are alive to manage business profits or personal investments. A Testamentary Discretionary Trust (TDT) is created through your Will and remains dormant until your death. Once activated, selected assets can flow into the TDT rather than directly into the personal names of your beneficiaries.

2. How do the new 2028 trust tax rules affect my existing estate plan?
Initially, there was widespread concern that the proposed 30% minimum trustee tax floor could apply broadly to discretionary structures. However, Treasury has clarified that genuine testamentary discretionary trusts will be exempt from this 30% minimum tax regime. If your estate plan uses a genuine TDT for deceased estate assets, your structure appears to remain protected, subject to the final legislation.

3. Can I still distribute income to minor children tax-free under a testamentary trust?
Yes, this remains one of the most powerful wealth-preserving benefits of a TDT. Under an ordinary family trust, distributions to minors above $416 can trigger penalty tax rates of up to 47%. However, income from a genuine testamentary trust can qualify as “excepted trust income,” meaning minor children and grandchildren may be taxed at adult marginal rates, including access to the current $18,200 tax-free threshold.

4. Does the testamentary trust exemption apply to Wills written after the Budget?
Based on Treasury’s updated guidance, the exemption is not limited only to testamentary trusts already active before Budget night. Treasury refers broadly to discretionary testamentary trusts established for genuine testamentary purposes. However, for testamentary trusts established on or after 1 July 2028, the trust must be limited to benefiting individuals and income-tax-exempt entities, such as registered charities.

5. Can I inject my active business assets or personal portfolios into a testamentary trust after someone dies?
Treasury has flagged integrity rules to prevent unrelated assets from being introduced into a testamentary trust to access the exemption. The protected treatment appears to be focused on income from assets of the deceased estate. If non-estate assets or outside capital are added later, income from those assets may be subject to the 30% minimum tax. The exact tracing and apportionment rules will need to be confirmed in the final legislation.

6. How do I ensure my testamentary trust is considered “genuine” by the ATO?
The broad policy intent is now clearer, but the exact boundaries of “genuine testamentary purpose” will depend on the final legislation. To reduce the risk of your estate plan being caught by the 30% minimum tax regime, your Will should be carefully drafted by specialist advisers rather than relying on a generic, off-the-shelf template.

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