Most people draft a will and assume their estate planning is sorted. But if you hold assets through a family or discretionary trust, the will is only half the picture. The trust deed itself often decides who actually inherits control, and getting that wrong can undo years of careful planning.

The Deed, Not the Will, Often Has the Final Say

A trust deed sets out who can be trustee, who holds appointor or guardian powers, and how those roles pass on after death. In Western Australia, trust assets generally sit outside your estate, so a will has no automatic authority over them. If the deed names a successor appointor who isn't the person you'd choose, or leaves that role silent altogether, your intentions in the will can be sidelined entirely. This is one reason people search for estate planning lawyers in Perth before they even think about updating a will, because the trust structure needs attention first.

Amendment Powers Vary More Than People Expect

Not every trust deed can be changed the same way. Some give trustees wide discretion to amend almost any clause; others lock certain terms in permanently, including how the trust vests or who can ever become a beneficiary. A deed drafted decades ago, before blended families or new grandchildren existed, might exclude people you now want included. Reviewing the amendment clause first tells you what's genuinely fixable and what would require a deed of variation or, in rarer cases, a court application.

Vesting Dates Are Easy to Forget

Every discretionary trust has a vesting date, the point where it must wind up and distribute assets outright. Some deeds set this decades into the future; others are surprisingly close. If a trust vests unexpectedly, the tax and asset protection benefit it was built for can disappear overnight, and beneficiaries may receive assets directly rather than through the structure your estate plan relied on. Checking this date should be routine, not an afterthought.

Succession of Control Deserves Real Thought

Who becomes appointor or trustee after you die shapes the trust's whole future, arguably more than the will does. Family disputes over trusts frequently trace back to vague or outdated succession clauses rather than disagreements about the assets themselves. Coordinating trust deed terms with your broader estate documents, rather than treating them as separate paperwork, is where a genuinely joined-up estate planning law firm earns its keep.

Bringing the Pieces Together

Trust deeds and wills need to work as one coordinated plan, not two documents drafted years apart by different advisers. A periodic review, ideally alongside any major life change, catches gaps before they become disputes. Getting proper legal advice on how your specific trust deed interacts with your estate plan is worth the time, because the fine print genuinely decides who ends up in control.  For learn more https://www.munrodoig.com.au/practice-areas/trusts-and-estate-planning/