Wills and estates
What a fight over a will could take out of the estate
A family provision claim can move a large part of an estate, and the legal costs usually come out of it as well. Both can be worked out in advance, on your own figures, before anyone spends a dollar on the fight and before the deadline runs out.
A will claim costs the estate twice. Once in the payout, once in legal fees.
When somebody is left out of a will, or left less than they expected, most states allow them to ask a court for provision out of the estate. Two things then happen to the estate, and only one of them gets discussed. The first is the provision itself. The second is the legal costs, which in a matter that settles typically consume 1% to 8% of the estate and in one that runs to a hearing 8% to 20% of the estate. The estate usually pays, on both sides.
That second number is why so many of these matters settle, and why the executor who understands it early ends up in a very different position from the one who finds out at the door of the court. In the one national study of decided cases, about 74% of family provision claims changed the distribution, and about 88% where the estate was between $1m and $3m. "We will fight it" is a plan with a price, and the beneficiaries pay it.
The deadlines are short and they differ in every state: 12 months from the date of death in New South Wales, 6 months from the grant in Victoria, 3 months from the grant in Tasmania.
A claim you did not know was coming is still a claim. A deadline you did not know about is simply gone.
What the family provision calculator works out
- Who is an eligible person in your state. The categories differ, and in some states a stepchild, a former spouse or a member of the household qualifies where in others they do not.
- How the factors a court weighs line up on these facts. The relationship, the size of the estate, the applicant's financial position, competing claims, and any provision already made.
- An indicative range for the provision, in dollars, with every line of the need calculation shown.
- The notional estate question in New South Wales, the only state that has one, where assets that left the estate within three years can be pulled back into it.
- All nine ways the claim can end, put in order by what is left for the people named in the will.
What you get in the full report
- Settle against defend, priced. What each ending leaves the will's beneficiaries, and how much sits between settling before anything is filed and fighting it to judgment.
- Both sides of the table. The same arithmetic works whether you are the executor, a beneficiary or the person considering a claim. The numbers do not change with who is reading them.
- Your state's rules in full. Eligibility, the limitation period, notice requirements, and the costs practice, which differs meaningfully between jurisdictions.
- Something to take to a solicitor. A solicitor's written advice on a claim typically costs $2,000 to $5,000, and running even a simple claim that settles early costs $20,000 to $40,000 a side. This report costs a tiny fraction of either, and it ends with the questions to ask, so the first meeting starts with the numbers already worked out.
What this calculator cannot do
It is not legal advice, and provision is discretionary. A court decides what is adequate on the evidence, and no calculator can predict a judgment. What it can do is show the range these matters fall in, what the costs do to the estate on the way there, and what deadline you are working to. Those three facts are what most people are missing while they decide whether to get advice at all.
Everything here runs on the succession legislation of each state as at 1 September 2026.
What people ask before they run it
Who can contest a will in Australia?
Only an eligible person, and each state's own Act sets the list. A spouse and a child of the person who died can claim everywhere, and so can a de facto partner living with them at the date of death. Beyond that it varies: New South Wales also allows former spouses, and grandchildren and household members who were dependent; Victoria also allows stepchildren and registered caring partners; Queensland is one of the narrowest, at spouse, child or dependant. Being on the list only opens the door. The court then asks whether the will left that person without enough to live on and get ahead in life.
How long do I have to contest a will?
It depends on your state, and the shortest is 3 months from the grant in Tasmania. New South Wales allows 12 months from the date of death. Queensland wants written notice within 6 months of the death and the application filed within 9 months of the date of death. Victoria, South Australia, Western Australia and the ACT allow 6 months from the grant, and the Northern Territory allows 12 months from the grant. What catches people is what the clock runs from: probate is often granted months after a death, so six months from probate and six months from the death are very different amounts of time.
How much does it cost to contest a will in Australia?
Practitioners publish $20,000 to $40,000 a side for a simple claim that settles early, and upwards of $100,000 a side for an average estate taken to a hearing, and the estate usually carries both sides. No Australian court publishes a scale, so the report prices costs as a likely band and says so on the page: roughly 1% to 8% of the estate where it settles and 8% to 20% of the estate where it runs to a contested hearing. The one thing a court has published is a power rather than a figure: where the net distributable estate is under $1,000,000, the Supreme Court of New South Wales may cap what a party recovers (Practice Note SC Eq 7, paragraph 40).
Can a claim reach superannuation or a jointly owned house?
In New South Wales it can. The notional estate rules in the Succession Act 2006 let a court treat property that never formed part of the estate as though it had been there all along. That includes a house that passed to the survivor, superannuation paid straight to a nominated person, or a gift made in the three years before death to keep money away from a claim. No other state or territory has anything like it, so everywhere else, what passes outside the will is outside the claim.
Do most claims to contest a will succeed?
In the one national study, most did. White, Tilse, Wilson, Rosenman, Purser and Coe, Estate Contestation in Australia: An Empirical Study of a Year of Case Law (2015) 38(3) UNSW Law Journal 880, reviewed every publicly available Australian succession judgment over twelve months. It found that about 74% of the family provision claims in it resulted in some change to the distribution, rising to about 88% for estates between $1m and $3m. 63% of the claims were brought by children of the deceased and 23% by partners or former partners. Those are findings about judgments, the minority of matters that did not settle, and they are not a prediction about any particular claim. Nothing on this site will give you a percentage chance of success, because nobody can.
Can an estranged child contest a will?
Yes. Estrangement is not a bar to a claim anywhere in Australia. It is one factor among many, and courts care more about why the relationship broke down than about how long the silence lasted. A long, unexplained absence can reduce the moral claim and the size of an order, and it matters more on a small estate than a large one, because every dollar ordered comes visibly out of somebody else.
Who pays the legal costs when a will is contested?
Usually the estate, on both sides. In most court cases the loser pays, but family provision claims do not follow that rule in the ordinary way, so the money that pays for the fight is the money being fought over. Courts can still order an unsuccessful claimant to pay costs in some cases. In New South Wales, where the estate is under $1,000,000, the Supreme Court may cap what a party recovers.
Can you contest a will after the time limit has passed?
Yes, but only with the court's permission, and it is never automatic. Every Australian Act lets a court allow a late claim. Courts look at how long the delay was, why it happened, whether the estate has already been paid out, and whether the beneficiaries would be treated unfairly. Once an estate has been paid out, a claim is much harder, and in several states (including Victoria, South Australia and Tasmania) a late claim cannot be allowed at all once the estate has been fully paid out.
Can a stepchild contest a will in Australia?
It depends on the state. Queensland, Victoria and Tasmania treat a stepchild as a child. South Australia, Western Australia, the Northern Territory and the ACT allow a stepchild to claim only on conditions, such as having been supported by the person who died. New South Wales does not list stepchildren at all, although one may still qualify as a dependent member of the household.
What is a deed of family arrangement?
It is a written agreement in which everyone with an interest in an estate agrees to divide it differently from the will. It can settle a will dispute without going to court, for a drafting fee rather than a litigation bill. It only works if everybody affected signs and has the legal capacity to do so, and it cannot bind an eligible person who does not sign.
Can you leave a child out of your will in Australia?
Yes. Australia has testamentary freedom, which means you can leave your estate to whoever you like. What you cannot do is stop an eligible person applying to a court after you die, and a child is eligible in every state. So leaving a child out exposes the estate to a claim, and to the legal costs that usually come out of the estate on both sides.
Do you give legal advice?
No. This is an information service. It applies the published succession laws to the figures you enter and shows what they produce, with every working visible. It ranks the ways a claim can end on one stated measure, what reaches the will's beneficiaries, and it does not recommend one, does not predict what a court would do, and does not tell you whether to bring or defend a claim. For a live dispute, a solicitor can advise you, and the report ends with the questions to put to one.
Everything on Family Provision
Your estimate is free, and it is a real answer.
Prices what a family provision claim could take out of an Australian estate on your own figures - who counts as an eligible person in your state, how the factors a court weighs line up, an indicative range for the provision, the legal costs the estate usually bears, and the deadline you are working to. Ranks all nine ways the claim can end on what reaches the will's beneficiaries.
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