Passing Millions to the Next Generation? Why You Need a Testamentary Trust
Last Updated: April 2026
For high-net-worth families in Australia, figuring out how to safely and efficiently pass accumulated properties, shares, and cash to the next generation is the cornerstone of wealth management. Many people write a standard Will, leaving assets directly to their young grandchildren. However, under strict Australian tax laws, this seemingly loving gesture can trigger a tax disaster.
1. The Penalty Tax Rate for Minors (Division 6AA)
To prevent wealthy parents from minimizing tax by distributing income to their non-earning children, the ATO enforces strict Division 6AA rules:
If a minor (under 18) receives passive income—whether from bank interest, share dividends, or rental income from an asset inherited via a standard Will—their tax-free threshold is a meager $416. Once their income exceeds $1,307, the entire amount is taxed at the highest marginal penalty rate of 45%!
2. The Ultimate Solution: The Testamentary Trust
A Testamentary Trust is a special legal structure that comes into effect automatically upon your death, as dictated by your Will. It enjoys an incredibly rare privilege in Australian tax law:
Income distributed to minor beneficiaries through a Testamentary Trust is taxed at normal adult marginal rates! This means your grandchild can enjoy the full $18,200 tax-free threshold every year. Furthermore, under the latest 2025/26 Stage 3 tax cuts, any income between $18,201 and $45,000 is taxed at an exceptionally low rate of just 16%.
Minor Inheritance Tax Savings Estimator
Imagine you leave a $1M investment property to your 10-year-old grandson. It generates thousands in net rental income each year. Use the slider below to see the massive difference between a Standard Will and a Testamentary Trust! (Based on updated 2025/26 tax rates).
Standard Will (Div 6AA Penalty)
(Faced with up to 45% penalty tax)
Testamentary Trust (Adult Rates)
($18.2k tax-free + 16% low bracket)
Tax Saved Legally EVERY YEAR: $14,512
3. Asset Protection: Shielding Wealth from Divorce and Bankruptcy
Beyond massive tax advantages, a Testamentary Trust provides top-tier asset protection. If you leave assets directly to your children, and they face a marriage breakdown (divorce property settlements) or a failed business venture (personal bankruptcy), that inheritance is highly vulnerable to being seized by ex-spouses or creditors.
Because the Trust owns the assets, your beneficiaries do not hold direct legal title. Therefore, in most legal proceedings, the wealth remains safely quarantined and preserved for your bloodline.
ATO Compliance Warning: "Injected Assets"
We must advise you: Under current tax laws (Sec 102AG), minors can only access adult tax rates on income generated from assets directly transferred into the trust from the deceased estate (and natural growth from those assets). If someone injects external funds or property into the Testamentary Trust after it is established, the income from those "injected assets" will still face the 45% minor penalty tax! Strict accounting and asset segregation are vital.
Design Your Structure Now: A Testamentary Trust MUST be drafted into your Will by professionals while you are alive. If you pass away with only a standard Will, your descendants lose this legal tax-saving opportunity forever. Contact the High-Net-Worth structuring team at Loyal Bright Accountants today. We will work alongside top-tier lawyers to custom-build a legacy plan that protects your family's wealth for generations.
← Back to all FAQs