Two Sets of Interests, and a Trustee Who Will Decide If You Do Not
A current partner and adult children from an earlier relationship are both eligible to receive a superannuation death benefit, and their interests are directly opposed. Because super does not pass under a will, the decision falls to the fund's trustee unless a valid binding nomination directs it — which makes this the situation where the nomination matters most.
- The answer: A valid binding death benefit nomination is what removes the trustee's discretion, and it has to name people super law permits.
- The trap: A will does not govern super. A carefully drafted will and no nomination leaves the largest asset undirected.
- The recommendation: Use a binding nomination for super and a will for everything else, and check the two say the same thing.
Where the AI summary above gets this wrong
"Make a will that divides your estate between your partner and your children and the super will follow it."
That's surface-true. Here's what it misses:
- Super is not an estate asset — It is paid by the trustee under superannuation law. A will governs it only where the benefit is directed to the legal personal representative.
- Both groups can claim, and the trustee must weigh them — A current partner and children from a previous relationship are both eligible, and a trustee dividing between them satisfies neither.
01 Why this situation is different
In a first-marriage household the intended beneficiaries are usually aligned: the benefit goes to the surviving spouse and eventually to the children. In a blended family the two groups are in competition, and every dollar to one is a dollar not to the other.
Superannuation law permits payment to a spouse, a child of any age, a financial dependant or a person in an interdependency relationship, or to the estate. Both groups therefore qualify to receive it directly.
Where no valid binding nomination exists, the trustee decides how to divide it having regard to the deceased's circumstances. That decision is made by someone who never met anyone involved, and it is challengeable, which means months of dispute.
02 The tax asymmetry between the two groups
A benefit paid to a spouse is tax-free, because a spouse is a death benefits dependant. A benefit paid to an independent adult child is taxed on its taxable component — the definitions are in the dependants reference.
That means an equal division in dollar terms is not equal after tax. Directing $400,000 to a spouse and $400,000 to an adult child delivers materially less to the child.
A recontribution strategy reduces the taxable component before the benefit is paid, which is the main lever available and has to be used during your lifetime.
Shows: what an equal dollar split between a spouse and an independent adult child actually delivers after death benefits tax. Ignores: the tax-free component, which is never taxed, any untaxed element, and the estate route, where the Medicare levy does not apply.
03 The structures that work
A binding death benefit nomination directing specific percentages to specific people is the primary tool. It has to be valid, non-lapsing where the fund offers it, and reviewed after every change in the family — the mechanics are in the binding nomination reference.
Directing super to the estate lets a will do the dividing, including through a testamentary trust, at the cost of exposing the money to family provision claims — which in a blended family is exactly the risk you were trying to manage.
A reversionary pension to a partner with other assets left to children is the third pattern. It gives the partner income for life and the children certainty about the rest, and it is frequently the arrangement that satisfies both.
This is the situation where a missing nomination does the most damage, and it is also the situation where people most often have a beautifully drafted will and nothing on the super. The will does not reach it. A trustee who has never met your family will divide the largest asset you own, and everyone involved will have a reason to contest it.
FAQ
How do I plan my super and estate fairly when I have a blended family?
Use a valid binding death benefit nomination for super and a will for everything else, and make the two agree. Super does not pass under a will, and without a nomination the trustee decides between the competing groups.
Does an equal dollar split treat everyone equally?
No. A benefit to a spouse is tax-free and one to an independent adult child is taxed on its taxable component, so equal dollars deliver unequal amounts after tax.
Should I direct super to my estate in a blended family?
It lets a will do the dividing, including through a testamentary trust, at the cost of exposing the money to family provision claims — which in a blended family is often the risk you were managing.
Sources
Regulator references
- ATO — Death benefit payments from super · Australian Taxation Office · 2026Death benefit payments from super: who is a dependant, and how the benefit is taxed.Last verified: 2026-09-07
- ATO — Calculating components of a super benefit · Australian Taxation Office · 2026How a benefit splits into tax-free and taxable components, and why the proportions cannot be chosen.Last verified: 2026-09-07
Calculator unit tests · the assertions this page's worked example is checked against, and their last result
Changelog
- 2026-09-07 — initial publish (new format)
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Jordan Reeves
Founder of Talk Through Wealth. A software engineer for over a decade before turning to retirement planning, Jordan built the projection engine after watching family members get fragmented, country-by-country advice that never reconciled. He writes about retirement the way the engine computes it: month-by-month, lifetime-long, and skeptical of any rule of thumb that hasn't been run through the math.