Testamentary Discretionary Trusts: Federal Government Backdown on 30% Minimum Tax

The Federal Government’s announcement today is a welcome development for families who use testamentary discretionary trusts as part of their estate planning. Following significant backlash to the 2026 Federal Budget proposals, testamentary trusts now appear to have been carved out from the proposed 30% minimum tax regime for discretionary trusts.
This is an important shift from the position announced in the Federal Budget. At that time, the proposed reforms stated that testamentary discretionary trusts — particularly those created under Wills after Budget night — would be caught by the new tax rules (Budget 2026–27 Tax Explainer). For many families, that would have materially reduced one of the major advantages of using a testamentary trust in a Will.
What was announced in the Federal Budget?
The original Budget proposal aimed to introduce a 30% minimum tax on discretionary trusts from 1 July 2028. The policy was designed to change the tax treatment of trust distributions and reduce the tax benefits commonly associated with discretionary trust structures.
When first announced, testamentary discretionary trusts were included. That created uncertainty for estate planning, because testamentary trusts have long been used to provide asset protection, flexibility, and tax-effective income splitting for beneficiaries, particularly children and grandchildren.
For many families, that Budget proposal would have undermined the very reason testamentary trusts are included in Wills.
What has changed now?
The Government has now indicated that testamentary trusts will be carved out from the proposed changes. In practical terms, that means testamentary trusts used for genuine testamentary purposes are expected to remain outside the new 30% minimum tax regime.
That is a significant backdown. It restores much of the confidence that estate planning practitioners and clients have historically placed in testamentary discretionary trusts as a legitimate and valuable planning structure.
This change is especially important because the original Budget position appeared to blur the distinction between ordinary discretionary trusts and testamentary trusts. The latest announcement suggests the Government has now recognised that those structures serve different purposes and should not necessarily be treated the same way.
Why this matters for estate planning
Testamentary discretionary trusts remain one of the most useful estate planning tools available in Australia. Properly structured, they can help families:
- protect inherited assets from relationship breakdowns, bankruptcy, and creditor claims.
- provide flexibility in how estate assets are managed and distributed.
- support children and grandchildren in a controlled and tax-effective way.
- preserve family wealth across generations.
The latest announcement is particularly important because it preserves the role of testamentary trusts in achieving those objectives. If the Budget proposal had proceeded in its original form, the tax advantages of these trusts may have been significantly reduced, especially where beneficiaries are on lower marginal tax rates.
A timely opportunity to review your Will
The Government’s announcement has removed some of the immediate concern created by the Budget, but it has not removed the need for proper advice. Testamentary trusts remain a powerful and flexible estate planning tool, and the latest development reinforces the importance of getting the structure right from the outset.
If you are considering a new Will, or if your existing Will includes a testamentary discretionary trust, now is a good time to review whether it still reflects your wishes, your family circumstances, and the current law.
Crabtree Legal assists clients across Perth, Western Australia and Australia with Wills, testamentary trusts, estate and business succession planning. If you would like advice on whether your Will should be updated in light of the latest trust announcements, our team can help.



