How to keep your family trust out of ATO trouble
The ATO’s renewed focus on Section 100A means family trusts that move income between relatives or entities could face top-rate tax penalties. Here’s what it means for investors, property owners and families.
If you use a family trust to manage income or investments, you may have seen the term Section 100A appearing more often in tax discussions.
It sounds technical, but the idea is simple: the Australian Taxation Office (ATO) wants to ensure that trust income is going to the people for whom it is meant, not being redirected to someone else to reduce tax.
In recent years, the ATO has increased its focus on how families distribute trust income, particularly where funds end up back with parents or other relatives instead of the named beneficiary.
These types of arrangements, known as reimbursement agreements, can lead to serious tax consequences if they are not genuine or properly documented.
Most families using trusts for legitimate reasons, such as protecting assets, running a family business, or helping children financially, have little to worry about.
Still, it is important to understand what Section 100A covers, what situations the ATO considers risky, and how to stay compliant.
What is section 100A?
Section 100A is a rule designed to stop people from using a family trust to move income around purely to save tax.
It applies when:
- a trust says one person is entitled to the income,
- but someone else actually benefits from it, and
- the main purpose of the arrangement is to reduce tax.
When this happens, the ATO can ignore the original distribution and tax the trustee on that income at the highest marginal rate.
Why does the ATO care?
Family trusts are widely used in Australia for genuine purposes, such as managing wealth, sharing profits, and supporting family members. The ATO, however, has found examples where the person recorded as receiving the income never actually benefits from it.
A common case is where parents allocate income to their adult children, who are in lower tax brackets, but the funds are later used by the parents.
The ATO treats these as reimbursement agreements and views them as high risk.
When family trust arrangements are acceptable
Section 100A does not apply to ordinary family or commercial dealings. If a distribution is made for a genuine reason and the person named genuinely benefits, it is usually fine.
Examples include:
- distributing income to a child to help pay university fees or rent
- using trust income for shared family expenses, such as a holiday
- paying real business costs from a trust that operates a legitimate enterprise.
In short, if the decision makes sense in everyday family or business life and is not just a tax strategy, the arrangement is likely safe.
Risky scenarios
The ATO may review a trust more closely when:
- an adult child receives income but pays or loans it back to a parent
- the trust distributes to a company or another trust with tax losses, just to use those losses
- there is no evidence showing how the beneficiary received or used the money.
- the income stays in the trust but is used by someone else for personal benefit.
If section 100A applies
When the ATO determines that Section 100A applies, it disregards the original distribution.
The trustee is then taxed on that income at the top individual rate, and penalties or interest may follow.
How to stay out of trouble
- To keep your trust arrangements low-risk and transparent, ensure beneficiaries genuinely receive their income. They should benefit personally, not immediately pass it to someone else.
- Maintain clear records. Trustee resolutions and proof of payments should show how and when funds were used.
- Avoid complex structures. Simple, straightforward arrangements are less likely to raise concerns.
- Seek professional advice. Every trust operates differently, and expert guidance can help you stay compliant.
How section 100A impacts trusts that hold property
Many family trusts hold Australian property and that is where Section 100A can cause problems if distributions and benefits are not aligned.
When trust property income is distributed
If your trust owns a rental property, the net rental income must be distributed each year to beneficiaries.
If income is distributed to someone who genuinely receives and benefits from it, there is little concern, however, if income is allocated to one person on paper but used by someone else, for example, parents directing rental income to pay their mortgage, the ATO may see that as a reimbursement agreement, and the trustee could be taxed at 47 per cent.
When trust distributions are used to pay property costs
It is normal for a trust to use rental income to pay property expenses like rates, insurance and maintenance.
That is fine if the property belongs to the trust but if distributions to a low-tax-rate beneficiary are used to pay expenses on a property mainly benefiting someone else (for example, parents living in it rent-free), that may breach Section 100A.
When a trust property is used by family members
If a property owned by a trust is occupied by family at below-market rent or used privately without commercial purpose, the ATO may question whether it is a genuine investment.
If rental income is distributed to others while the family enjoys the benefit of the property, this could be viewed as a benefit transfer, another Section 100A risk.
When the trust sells a property
If a trust sells a property and makes a capital gain, the gain is distributed to beneficiaries.
If that beneficiary never actually receives or benefits from the proceeds, Section 100A could apply. The trustee would then pay tax at the highest rate instead of the beneficiary receiving the 50 per cent capital gains discount.
When loans or unpaid entitlements are involved
Property-holding trusts often use loans or unpaid present entitlements (UPEs) between family members or related entities. If UPE remains unpaid but the funds are used for another person’s benefit, the ATO may treat it as a reimbursement agreement, arousing Section 100A and Division 7A concerns if companies are involved.
Key takeaways for property investors
- Keep trust finances separate from personal ones
- Ensure distributions match genuine benefit flows
- Keep clear records of rental income, expenses, and resolutions
- Avoid using trust income to fund someone else’s personal costs
- Review your trust deed and seek professional advice before major property sales or restructurings
The bottom line
Section 100A is about fairness and transparency. When trust income is distributed for genuine reasons and the beneficiary actually benefits, there is little risk.
If distributions are made mainly to take advantage of lower tax rates without a real transfer of benefit, the ATO can step in.
Keeping your trust dealings simple, well-documented, and consistent with real family or business needs is the best way to stay on the safe side.
It is also important to remember that appropriate tax planning plays a key role when managing or setting up family trusts.
Effective advice should go beyond simply preparing tax returns. It should include forward planning to ensure your trust structure, income distributions, and record-keeping all align with ATO expectations.
Working closely with a qualified tax adviser can help you make informed decisions, manage risks, and keep your trust compliant while maximising legitimate tax outcomes.
