Glossary
A binding death nomination tells your super fund exactly who receives your super when you die - and super is not covered by your will. The nomination lapses every three years unless your fund offers non-lapsing ones, and an expired one returns the decision to the trustee.
A binding death benefit nomination is a legal direction to your super fund telling it exactly who receives your super when you die, and in what proportions. Super is not covered by your will - the fund is legally required to follow a valid binding nomination, which is what makes it binding. The nomination must be in writing, signed and witnessed by two adults, and re-signed every three years to stay valid. Some funds offer non-lapsing nominations that stay valid until you change them.
The people you can nominate are the super law's definition of dependants: your spouse or de facto partner, your children of any age, anyone who was financially dependent on you, and anyone in an interdependent relationship with you. You can also nominate your legal personal representative - your estate - which sends the money through the will instead. Nominating someone outside these categories, such as a sibling or a friend with no financial dependency, is not binding, and the trustee treats it as advice.
The mechanics are a form with legal force. You complete the fund's binding death nomination form, name the beneficiaries and proportions, sign it in front of two adult witnesses who also sign, and lodge it with the fund. The nomination binds the trustee: on a valid claim, the fund must pay the named people in the named proportions. The three-year clock starts at signing, and the nomination lapses silently at the end of it unless it is re-signed.
The tax follows the beneficiary. Death benefits paid to dependants - a spouse, children, financial dependants - are tax-free regardless of the components. Paid to a non-dependant, such as a sibling or a parent without financial dependency, the taxable component is taxed at up to 15 percent, and the tax-free component stays tax-free. On a $600,000 benefit that is entirely taxable, a non-dependant pays up to roughly $90,000 that a spouse would not.
The lapse is where the discretion returns. An expired nomination means the trustee decides who receives the benefit, weighing the claimants and the relationship evidence - a process that can take months to years and does not have to follow your will. SMSF deeds can be drafted with non-lapsing nominations, and some retail and industry funds offer them. Checking the expiry date is the maintenance the form requires.
For an Australian reader, the binding nomination is the only document that guarantees who receives what is often the second-largest asset after the family home. The insurance inside super entry covers the life cover that often sits on top of the balance. The account-based pension entry covers reversionary pensions, which continue to a nominated beneficiary. The tax difference between dependants and non-dependants is worth up to 15 percent of the taxable component.
A colleague named Brent (yes, that Brent) signed a binding nomination at 28, changed funds twice since, and assumed his will 'sorted everything out'. The nomination lapsed with the old fund, and super does not follow a will. His beneficiary paperwork is three funds out of date. The highest-leverage thing most Australians can do is check the binding nomination and its expiry date on every super account. The form is five minutes, and the alternative is the trustee's discretion.
A $600,000 death benefit that is entirely taxable component is paid to a spouse: tax-free, in full, as a lump sum or income stream. Paid to a sibling with no financial dependency, the taxable component is taxed at up to 15 percent - up to roughly $90,000 - before the sibling sees a cent. The binding nomination names who receives it, and the tax follows the relationship. The difference is the law's definition of dependant.
Brent signed a binding nomination at 28 and changed funds twice since; the last nomination lapsed after three years. His benefit is now decided by the trustee's discretion, weighing claimants and relationship evidence - a process that can take 14 months and does not have to follow his will. Re-signing the form every three years, or choosing a fund with non-lapsing nominations, is the maintenance. The expiry date is printed on the annual statement.
A member with no dependants nominates their legal personal representative, sending the $400,000 benefit through the estate and the will. Paid to the estate, the taxable component is taxed at up to 15 percent before the will distributes it, and the distribution follows the will rather than the fund's discretion. The nomination still matters: without it, the trustee decides whether to pay the estate at all. The estate route is the only binding option for non-dependants.
Mistake: Assuming the will covers super.
Why it bites you: Super is not an estate asset - it is paid by the trustee under super law, and the will only receives it via an estate nomination. Brent's will 'sorted out' everything except the largest asset after the house.
Mistake: Letting the binding nomination lapse after three years.
Why it bites you: An expired nomination returns the decision to the trustee, and the process can take 14 months without following the will. The expiry date is printed on the annual statement.
Mistake: Nominating a non-dependant as if it were binding.
Why it bites you: A sibling or friend with no financial dependency cannot be bound - the trustee treats it as advice. The estate nomination is the only binding route for non-dependants.
Mistake: Ignoring the tax difference between dependants and non-dependants.
Why it bites you: Benefits to dependants are tax-free; to non-dependants, the taxable component is taxed at up to 15 percent. On a $600,000 fully taxable benefit, that is up to $90,000 of difference.
I spent an evening reading the ATO's death benefit rules and my own fund's nomination form so you don't have to. The design is simple once you see it: the binding nomination is the only instruction the trustee must follow. It lapses every three years unless the fund offers non-lapsing ones, and the tax follows the relationship rather than the paperwork.
Brent assumed the will covered super and learned otherwise the hard way - the trustee's discretion, not his will, decided the timing. Check the nomination and its expiry on every account, nominate within the law's definition of dependant, and use the estate route for anyone else. Super is not covered by your will. That sentence is the entire entry and the most expensive thing most families never read.
No - super is not an estate asset and is paid by the trustee under super law. It only reaches the estate if you nominate your legal personal representative or the trustee chooses to pay the estate.
Three years from signing, and it must be re-signed and re-witnessed to stay valid. Some funds offer non-lapsing nominations that stay in force until you change them.
A spouse or de facto partner, children of any age, anyone financially dependent on you, and anyone in an interdependent relationship. Anyone else - such as a sibling or friend - can only be covered via an estate nomination.
Paid to dependants, death benefits are tax-free regardless of components. Paid to non-dependants or the estate, the taxable component is taxed at up to 15 percent.
The trustee uses its discretion to decide who receives the benefit, weighing claimants and relationship evidence. The process can take months to years and does not have to follow your will.
Disclaimer: This information is general in nature and does not constitute financial or legal advice. Always consult a qualified professional for your specific situation.

Financial Chaos Analyst
Ivy Sinclair-Wren is a Financial Chaos Analyst covering investing, AI, wealth psychology, and the emotional consequences of opening finance apps during market crashes. Based in Melbourne, she specializes in demystifying the Australian tax code and helping users navigate the intersection of spreadsheet logic and human irrationality.