Finding out you’ve been left out of a will, or given far less than you expected, is unsettling enough without decoding legal jargon at the same time. If you’re wondering whether you have grounds to contest a will in NSW, the short answer is: it depends on who you are, why you’re unhappy with the will, and how quickly you act. This guide walks through the practical side of it. Who can actually make a claim, what the courts look for, and when it’s genuinely worth your time and money.

Who Can Contest a Will in NSW?

Not everyone who feels hard done by can bring a claim. NSW law uses a specific test to work out who can contest a will in NSW. It’s known as the “eligible person” test.

Eligible Person Categories Under Family Provision Law

Under the Succession Act 2006 (NSW), an eligible person generally includes a spouse or de facto partner of the deceased, a child (including adult children), a former spouse, someone who was wholly or partly dependent on the deceased, and a person who lived in the same household as the deceased at some point.

That’s a broader group than most people expect. It’s not just about being named, or not named, in the will. It’s about your relationship to the person who died and, in some cases, how dependent you were on them.

Common Situations That Surprise Families

Grandchildren usually don’t qualify unless their grandparent was financially supporting them. Stepchildren often don’t qualify either, unless they can show they were a dependant or household member.

Picture two adult siblings left out of their late father’s will after years of estrangement. One may still qualify as an eligible person. The other’s claim could hinge on how much contact and financial dependence existed before he died.

A de facto partner of only a few years, not named in an old will that was never updated after the relationship began, is a textbook example of who the family provision regime was designed to protect.

The Four Main Grounds to Contest a Will in NSW

There are really two different things people mean when they talk about contesting a will. One is challenging whether the will is legally valid at all. The other is arguing that, even if it’s valid, it doesn’t provide enough for you. Understanding the grounds to contest a will in NSW starts with telling these apart.

Lack of Testamentary Capacity

A will can be challenged if the person who made it didn’t understand what they were doing at the time. This usually comes up with elderly will-makers affected by dementia, or people who were seriously unwell and medicated near the end of their life. Imagine a father who signed a new will weeks before he died, at a stage his doctors had already noted significant cognitive decline. His earlier will might be the one that should stand.

Undue Influence or Fraud

Sometimes a will reflects someone else’s wishes, not the will-maker’s own. If a carer, new partner, or family member pressured or manipulated the person into changing their will shortly before death, that will can be challenged. Fraud covers cases where the will itself was forged or its contents misrepresented to the person signing it.

Improper Execution

NSW law sets out formal requirements for a valid will. It must be in writing, signed, and properly witnessed. A will that skips these steps, or was signed under unclear circumstances, may not hold up, even if everyone agrees it reflects what the person wanted.

Inadequate Provision (Family Provision Claims)

This is the ground most people mean when they talk about contesting a will in NSW. Here, you’re not saying the will is invalid. You’re saying it doesn’t adequately provide for you, given your relationship with the deceased and your financial needs. This is by far the most common pathway for a will dispute in NSW, and it’s what most of this guide focuses on.

Family Provision Claims vs Other Will Challenges

It’s worth being clear about this distinction before you go any further, because it determines your whole strategy. Challenging a will’s validity, for lack of capacity, undue influence, fraud, or improper execution, means arguing the document itself shouldn’t be recognised as the deceased’s true will.

A family provision claim NSW process takes a completely different approach. It accepts the will is valid, then asks the court to order a different distribution because the current one doesn’t adequately provide for an eligible person. Most disputes over wills in NSW run this way, under the Succession Act 2006, rather than as validity challenges.

Getting this distinction right early matters. The evidence you need, and the arguments you run, look very different depending on which pathway applies to your situation.

Time Limits: Why Acting Quickly Matters

Whichever ground applies to you, timing is critical. Delay is one of the most common reasons people miss out on a claim they otherwise would have won.

The 12-Month Rule From Date of Death

Under the Succession Act 2006 (NSW), an eligible person generally has just 12 months from the date of death to file a family provision claim, and courts only grant extensions in limited circumstances. This is the contesting a will NSW time limit that catches most people off guard. It runs from the date of death, not from when probate is granted or when you found out about the will’s contents.

If you think you might have a family provision claim NSW time limit issue because time has already passed, it’s still worth getting advice. Courts can extend the deadline where there’s sufficient reason for the delay, but you shouldn’t rely on that possibility.

Contesting a Will After Probate

Many people assume that once probate has been granted, it’s too late to contest a will. That’s not quite right. You can still bring a family provision claim after probate, provided you’re within the 12-month window.

What changes is practical, not legal. Once probate is granted, the executor can start distributing the estate. Acting early matters. Once an estate has been distributed, unwinding those payments to fund a late claim becomes far harder, which is why lawyers generally advise getting advice as soon as a dispute is suspected, not after probate wraps up. If you want to understand how the broader probate process works and where disputes tend to arise, it helps to get a clear picture of the timeline before you decide on next steps.

How to Contest a Will in NSW: The Process Step by Step

Contesting a will isn’t a single court hearing. It’s a process, and most disputes never actually reach a trial.

It typically starts with an initial consultation, where a lawyer assesses whether you’re an eligible person and whether your circumstances support a claim. From there, your lawyer usually gathers evidence about your relationship with the deceased, your financial position, and the size of the estate. Most claims then move into negotiation or mediation, where the parties try to reach a settlement without going to court. Only a small proportion end up in a full hearing before the NSW Supreme Court.

Costs and Realistic Outcomes

Contesting a will costs NSW residents money to consider, and it varies a lot depending on how far the matter goes. Many firms offer a fixed fee for an initial consultation and advice, so you know your costs before committing to anything further. Beyond that, some matters can proceed on a no-win, no-fee or deferred-payment basis, particularly once a lawyer is confident there’s a reasonable claim. Costs escalate significantly if a matter goes all the way to a contested hearing, which is one reason most estate disputes in NSW settle through negotiation or mediation instead.

When It Is (and Isn’t) Worth Contesting

A claim is generally worth pursuing when you clearly fit the eligible person test, when the provision you received (or didn’t) looks genuinely inadequate for your needs, and when the estate is large enough to justify the legal costs involved. It’s often not worth pursuing when the estate is very small, when your relationship with the deceased was distant and can’t be evidenced, or when the will already made reasonable provision for your circumstances, even if it wasn’t what you hoped for.

This is exactly the kind of judgment call that benefits from an early, honest conversation with a lawyer, before you spend money on a claim that was never likely to succeed, or before you assume you have no options when you actually do.

Get Clear, Practical Advice Before You Decide

Grief is hard enough without trying to work out where you stand legally. Whether you suspect you’ve been unfairly left out of a will, or you’re an executor facing a claim from a beneficiary, getting clear advice early gives you options you won’t have later.

At GKE Lawyers, we offer a free initial conversation so you can understand your options before committing to any costs. We explain your situation in plain English, tell you honestly whether contesting a will in NSW makes sense for you, and help you move forward with confidence rather than guesswork. Given the strict time limits involved, it’s worth reaching out sooner rather than later. Get in touch with GKE Lawyers today to talk through your situation.