Intestacy in Australia: what happens if a retiree dies without a valid will

When an Australian retiree dies without a valid will — what the law calls dying "intestate" — the government does not simply hand the estate to whoever the person would have chosen. Instead the estate is divided according to a fixed formula set out in the succession legislation of the state or territory where the person lived, and that formula is rarely what the deceased actually had in mind. Intestacy is not only for those who never made a will. It also catches a will that fails the formal validity tests, a will that doesn't deal with the whole estate, and a will whose named beneficiaries have already died. For retirees — especially those in second marriages, de facto relationships, or blended families — understanding what this "default will" would produce is the clearest argument for putting your own wishes in writing. This article explains how intestacy works, the traps that surprise families most, and the straightforward fix.

The circumstances that trigger intestacy are broader than "never got around to it." A retiree might have no will at all, or might have one that was never validly signed and witnessed and so cannot be accepted by the court. A will that hands out specific gifts but never names someone to take "everything else" leaves that leftover — often the house and the bulk of the money — to be shared out under the intestacy rules; this is called partial intestacy, and it catches people who believe an old will has them covered. A gift to someone who died before the will-maker can simply lapse. And there is one trap that surprises almost everyone: in every Australian state and territory, getting married automatically cancels any earlier will, unless that will was specifically made in contemplation of the marriage. A retiree who remarried after writing a will — perhaps years after a first spouse's death — may be fully intestate without realising it.

What does a surviving partner actually receive?

What the surviving partner receives depends on the state and, critically, on whether the deceased left children from another relationship. Where there are no children, or where all the children are also the surviving partner's, the partner generally takes the whole estate — a clean and consistent result. The complication is the blended family. Take New South Wales as the worked illustration: under the Succession Act 2006 (NSW), where the deceased leaves a spouse or de facto partner and children from a different relationship, the partner receives the personal effects, a "statutory legacy" (a fixed sum), and one-half of whatever remains, with the children sharing the other half. The statutory legacy is not a small number and it is not fixed in time. The legislated base is $350,000, adjusted upward by the Consumer Price Index from the December 2005 quarter, so the amount that applies is the figure in force at the date of death — recalculated every quarter, and sitting at roughly $600,000 for deaths in the first half of 2026. On a $1.5 million estate in NSW, that means the partner would take about $600,000 as the legacy plus half of the $900,000 remainder (another $450,000) — roughly $1.05 million — while the children from the earlier relationship share the remaining $450,000. That is a very different result from either "everything to my partner" or "split equally among the whole family." Statutory legacy amounts and split ratios differ significantly between states, so the state where a retiree is domiciled at death genuinely changes the outcome — a real issue for sea-changers and tree-changers who have relocated.

One accuracy point matters before going further: intestacy only governs assets that form part of the estate. Superannuation death benefits are usually paid by the fund trustee under a death benefit nomination and frequently pass outside the estate altogether, and property held as joint tenants passes automatically to the surviving joint owner by survivorship. So the headline estate figure and the amount the intestacy rules actually divide can be quite different — which is exactly why a will needs to be coordinated with super nominations, life insurance beneficiaries, and the way property is owned.

How does intestacy treat de facto partners?

The de facto question is the most-litigated part of modern intestacy. In NSW and most other states a de facto partner is treated the same as a married spouse for intestacy — but only if the relationship is proven, which typically means two or more years of living together, a child of the relationship, or a registered relationship. The hard cases are newer or disputed relationships, where the deceased's family contests whether a de facto relationship existed at all. That argument is decided by the Supreme Court on the evidence, and it tends to produce heavy legal costs and lasting family damage. For a retiree who has re-partnered after a spouse's death, naming the new partner in a will removes the uncertainty entirely.

Why do stepchildren miss out under intestacy?

The stepchildren trap is the most painful. Under intestacy, stepchildren have no entitlement unless they were legally adopted by the deceased. A retiree who raised stepchildren from their early years, treating them in every practical sense as their own, can produce an intestacy result in which those stepchildren receive nothing, while biological children — even ones with little contact — take the children's share. Intestacy distributes by legal relationship, not by closeness, which is why blended-family retirees so often need a will that reflects the family they actually have.

Who administers an intestate estate?

Without a will there is also no executor, so someone must apply to the Supreme Court to be appointed administrator and granted Letters of Administration — the intestate equivalent of probate. The court generally grants this to the person with the greatest entitlement, such as the spouse or children, or, where no family member is willing or able, to the state trustee body (in NSW, NSW Trustee and Guardian). Administering an intestate estate often takes longer and costs more than administering one with a clear will, and where a public trustee acts as administrator it charges fees on a published scale based on the size and work of the estate — a cost a validly appointed executor would have avoided.

What's the straightforward fix?

The remedy is genuinely simple but does require action. Make a valid will: a properly drafted document, signed by you in front of two adult witnesses who are not beneficiaries, dated, and stored where it can be found. Review it after every major life event — marriage, divorce, separation, re-partnering, the birth or adoption of children or grandchildren, the death of a named beneficiary, or a big change in assets — and slot that review into your regular financial check-up. Using an estate planning lawyer rather than a DIY kit costs relatively little against the financial and emotional price of an intestate outcome, and it greatly reduces the risk of the formal defects and missing residuary clauses that cause partial intestacy. Finally, make sure the will is coordinated with your super death benefit nominations, life insurance beneficiaries, and jointly held property, since each of those distributes on its own terms and needs to point the same way as the will.

Worked examples

These two cases show how intestacy produces outcomes people did not intend. They are illustrative only and not personal advice.

Tom, 74, retired, in a second marriage to Helen for 18 years. From his first marriage (now divorced) Tom has two adult children, Mark and Sarah; Helen has two adult children of her own, Emma and Liam, and the four grew up together from their teenage years. Suppose Tom solely owns assets forming an estate of about $1.6 million and never made a will after remarrying. Because Tom has a spouse and children from a different relationship, the NSW intestacy formula applies: Helen takes the personal effects, the statutory legacy of roughly $600,000 (2026), and half of the $1 million remainder (another $500,000) — about $1.1 million — while Mark and Sarah share the other $500,000. Emma and Liam, the stepchildren Tom raised, receive nothing from his estate. (If the family home were instead held jointly with Helen, it would pass to her by survivorship and never enter this calculation at all.) On these facts the rational step is for Tom to make a will reflecting his real intentions — for instance, specific provision for Emma and Liam alongside Mark and Sarah, with the balance to Helen. The will costs little; the intestate result costs both money and family peace.

Margaret, 69, widowed for eight years and in a de facto relationship with Patrick for four years. They live together in Margaret's home, and she has two children from her marriage, Daniel and Catherine. After her husband died Margaret made a will leaving everything to Daniel and Catherine, and she has not updated it since meeting Patrick, though she means to provide for him. Here the existing will is still valid — living with Patrick does not revoke it, because they have not married — so on its current terms Patrick receives nothing. A four-year, cohabiting de facto partner would, however, have a strong basis to bring a family provision claim against the estate, and such claims commonly succeed, again at the cost of legal fees and family goodwill. On these facts the rational course is for Margaret to update her will now to provide for Patrick deliberately — perhaps a right to live in the home for a defined period, a specific gift, or a combination — with the remainder to Daniel and Catherine, so the document matches her clear intention.

For retirees who have not finished their estate planning, intestacy is the outcome that applies by default, and it almost never matches what the person would have chosen. The practical work is to confirm whether a current, valid will exists, to notice the life events that may have quietly invalidated or outdated it, to watch for partial-intestacy gaps where a will lacks a residuary clause or names beneficiaries who have died, and to raise stepchildren and de facto issues squarely for blended families and newer relationships. Will drafting itself is a job for a qualified estate planning lawyer, not a financial adviser — but recognising the gap, and making sure super nominations, insurance, and property ownership all line up with the will, is exactly the kind of review worth doing while there is still time to act.

Sources

• Succession Act 2006 (NSW) — including s.106 spouse's statutory legacy and the intestacy distribution rules
• NSW Government (NSW Trustee and Guardian) — Dying without a Will
• Moneysmart (ASIC) — Wills and powers of attorney