Do Children Have to Get an Equal Share of an Estate?

You’re looking at your estate and wondering: do I have to split everything evenly between my children?

The short answer is no. You don’t.

Australian law doesn’t require you to leave equal shares to your children in your Will. You can leave different amounts. You can leave one child significantly more, or cut a child out entirely. That’s your legal right.

But here’s what most people miss: just because you can doesn’t mean you should, and it certainly doesn’t mean you won’t face consequences. Unequal inheritance is one of the most common triggers for estate disputes, and the way you structure it matters enormously.

This article walks you through the real question: not whether you’re allowed to leave unequal shares, but how to do it in a way that’s both defensible and thoughtful.

The Real Question: What Does “Fair” Actually Mean?

When you ask whether your children have to get an equal share, you’re often asking two different questions at once.

The first is legal: what does the law require?

The second is practical: what will stand up if challenged, and what will keep the family intact?

Most existing advice conflates the two. It tells you “there’s no obligation for equality” and leaves you to figure out what that means in practice. That’s not enough if you’re a business owner, a blended family, or someone whose children are in materially different financial positions.

Let me make this concrete.

Imagine you have three children. One works in your business and has taken genuine financial risk to grow it. One is a professional with a stable income and no need. One has ongoing care needs and limited earning capacity.

Equal shares in that scenario aren’t fair. They’re lazy.

But unequal shares invite scrutiny. If the child who gets less decides to challenge your Will, a court won’t just rubber-stamp your decision. It will ask whether what you’ve done is adequate provision for that child’s needs and circumstances.

The question isn’t “can you be unequal?” It’s “can you be unequal in a way that is rational, documented, and defensible?”

What Happens If You Die Without a Will: The Intestacy Trap

If you never get around to making a Will, the law steps in and makes one for you. It’s called dying intestate, and the rules are blunt.

Intestacy laws across Australia follow a similar pattern. Your spouse or partner receives a statutory legacy (a fixed dollar amount plus personal items), and then shares the remaining estate with your children. Once the spouse’s entitlement is satisfied, your children typically split the rest equally.

The exact numbers vary by state. In South Australia, the spouse receives the first $120,000 plus personal chattels, then shares the residue with the children. In Tasmania, it’s $350,000 plus chattels. New South Wales, Victoria and Queensland have their own thresholds and formulas.

But the principle is the same everywhere: children share equally, regardless of need, contribution, or relationship.

Think about what that means.

If you’ve already given one child $500,000 to buy into your business, intestacy doesn’t account for that. That child still gets an equal share of what’s left. If another child has been your primary caregiver for years, intestacy doesn’t reward that either. Equal shares, full stop.

This is the most common estate planning failure I see: business owners and professionals who assume “the law will sort it out fairly.” It won’t. Intestacy applies mechanical equality, not considered fairness.

And if you have a blended family, intestacy creates even sharper problems. Your current spouse receives their statutory entitlement. Your children from a previous relationship share the residue. If you wanted to provide for both in a way that reflects your actual intentions, you’re out of luck.

The message here is simple: if you want anything other than mechanical equality among your children, you need a Will. Intestacy is the opposite of control.

Can You Leave One Child More Than Another? The Legal Framework

Yes. You can leave unequal amounts. You can leave one child substantially more. You can leave a child out entirely.

There is no legal rule in Australia that requires equal treatment of children in a Will.

But that freedom comes with a caveat: unequal gifts are a risk factor for family provision claims.

Each state and territory has legislation allowing certain people, including children, to apply to court if they believe they haven’t received adequate provision from an estate. The typical time limit is around six months from the grant of probate or letters of administration, though this varies slightly by jurisdiction.

A family provision claim isn’t about enforcing equal shares. It’s about whether the provision made for an applicant is adequate for their proper maintenance, education and advancement in life. Courts look at a range of factors: the size of the estate, the applicant’s financial position and needs, their relationship with the deceased, any contributions they made, and competing claims from other beneficiaries.

So when you leave one child significantly less than another, you’re not breaking the law. But you are increasing the likelihood that the child who receives less will challenge the Will, and you’re giving them a basis to argue inadequacy.

The question a court will ask isn’t “did the parent treat all children equally?” It’s “was what this child received enough, given their circumstances?”

That distinction matters.

If you leave one child nothing because they’re financially secure and you’ve already supported them generously during your lifetime, and you document that reasoning clearly, a court may well uphold your decision. If you leave one child nothing with no explanation, or the child left out has genuine need, the risk of a successful challenge rises sharply.

Unequal gifts are legally permissible. They’re just not automatically safe.

Why Would You Leave Unequal Shares? Common Scenarios

Let me walk through the situations where unequal inheritance isn’t just defensible, it’s the right answer.

One child is in the business, others aren’t

You own a manufacturing business. Your eldest child has worked in it for fifteen years, taken salary below market to reinvest in growth, and carries personal guarantees on the company’s debt. Your other two children pursued different careers and have no interest in or capacity to run the business.

Equal shares in this scenario create disaster. If you leave the business in three equal parts, the working child is locked into a forced partnership with siblings who don’t want to be there. The business becomes unliquidable or gets sold at the wrong time, destroying value.

The sensible structure: leave the business (or the shares in the company that owns it) to the working child. Leave investment properties or liquid assets to the others, balancing value as closely as practicable.

Document why. Make it clear that the unequal split reflects who can actually operate the business and who has assumed risk. That’s not favouritism; it’s asset allocation that preserves value.

One child has already received substantial financial help

You gave one child $300,000 as a deposit on their first home and another $200,000 to fund postgraduate study overseas. Your other children received much less, or nothing, because they didn’t ask or didn’t need it at the time.

Courts recognise prior financial assistance, often called advancements, as a legitimate reason for unequal gifts in a Will. The logic is straightforward: you’ve already provided for one child during your lifetime; adjusting their inheritance to reflect that is fair, not punitive.

But you need to document it. If you’ve made substantial lifetime gifts to one child and you don’t explain the adjustment in your Will or in a letter of wishes, the child who receives less under the Will has a much stronger platform to argue they’ve been treated unfairly.

One child is a caregiver, others are not

One of your children has been your primary caregiver for the past decade. They’ve managed your medical appointments, your finances, your daily needs. They’ve put their own career on hold. Your other children live interstate and visit twice a year.

Contribution matters. Courts consider the nature and extent of the relationship between the deceased and each beneficiary when assessing whether provision is adequate. Leaving more to a child who has provided sustained, material support is not only legally defensible, it reflects reality.

Again, record the reasoning. Explain what that child gave up, what they provided, and why the larger share reflects genuine contribution.

One child has significant ongoing care needs

Your daughter has a disability that limits her earning capacity and will require supported living arrangements for life. Your son is a surgeon with no dependents and substantial assets.

Leaving your daughter a larger share, or structuring her inheritance through a trust to preserve government benefits and provide long-term security, isn’t unequal treatment in any meaningful sense. It’s adequate provision matched to need.

This is one scenario where unequal gifts are rarely challenged, because the reasoning is self-evident. But the structure matters: if you’re leaving a larger amount to a child with care needs, consider how it’s held (trust vs outright) and who manages it (professional trustee vs sibling).

Estrangement or high conflict

You haven’t spoken to one of your children in fifteen years. The relationship broke down irreparably. You don’t want them to benefit from your estate.

Can you exclude them? Legally, yes. But estrangement alone doesn’t guarantee your decision will stand. If the estranged child can demonstrate financial need, a court may still order provision, especially if the estrangement was initiated or sustained by you rather than them.

If you’re considering excluding a child due to estrangement, document the history carefully. Include timeline, reasons, and any attempts at reconciliation. Consider whether leaving a smaller amount (rather than nothing) reduces litigation risk while still reflecting the broken relationship.

Business Owners and Complex Assets: When Equal Division Is a Trap

If your estate consists of a family home and some cash, equal division is straightforward. If your estate consists of operating businesses, commercial property, trust structures and superannuation balances across multiple entities, equality becomes a puzzle.

And sometimes, trying to force equality destroys value.

Consider this: you own a logistics company worth $4 million, an investment property worth $1.5 million, and $500,000 in super. You have two children. One is the general manager of the logistics business and holds key client relationships. The other is a teacher with no interest in logistics and no commercial experience.

Equal shares would mean each child receives $3 million in value. But how?

If you leave the business jointly, you’ve just forced your working child into partnership with a sibling who doesn’t want to be there and doesn’t understand the business. Your teacher child now owns half a company they can’t operate and can’t easily sell, because who buys 50 per cent of a private family business?

The likely outcome: the business gets sold, probably at a discount because it’s a forced sale and key clients are uncertain about succession. Value evaporates.

The better structure: leave the business to the child who runs it. Leave the investment property and the super to the other child, perhaps topping up with life insurance or other liquid assets to equalise value.

Is that equal in a literal sense? No. One child gets the business, one gets property and cash. But it’s equal in value, it’s aligned with capability, and it preserves the business as a going concern.

Now complicate it further: what if the business is held in a trust, and the trust also owns the investment property? What if there are multiple entities, some with debt, some with contingent liabilities?

In those structures, “giving each child half” isn’t even a coherent concept. You need to think about control (who appoints and removes the trustee?), income (who receives distributions?), and capital (who benefits if assets are sold?). Equal division might mean equal voting rights, or equal income entitlements, or equal capital splits on wind-up. Those are not the same thing.

This is where most Wills fail. They say “I leave my estate to my children in equal shares” without defining what “equal” means in the context of discretionary trusts, unit trusts, companies and super funds. The result is years of litigation over what the Will-maker actually intended.

If you own a business or complex asset structures, equal division by asset count is naive. You need to think about equal value, functionality, and who can actually manage what they’re inheriting.

And you need advice that understands both the legal structures and the commercial realities. Most estate planning lawyers can draft a Will. Fewer can tell you whether the structure you’re proposing will survive contact with your actual assets and your actual children.

Designing Unequal Gifts So They Stand Up

If you’ve decided that unequal shares are the right answer, here’s how to do it in a way that minimises litigation risk and maximises the chance your intentions are respected.

Be clear and specific in your Will

Vague drafting invites disputes. “I leave the bulk of my estate to my son” is litigation waiting to happen. What’s “bulk”? What’s excluded? Why?

Clear drafting names assets, names beneficiaries, and allocates precisely. “I leave my 100 per cent shareholding in XYZ Pty Ltd to my son John. I leave my property at 45 Smith Street to my daughter Mary. I leave the residue of my estate in equal shares to John and Mary.”

If there’s a value imbalance and you’re comfortable with it, say so. “I acknowledge that the value of the business left to John exceeds the value of the property left to Mary. This reflects John’s role in building the business and his assumption of personal risk in its operation.”

Don’t make your executor guess what you meant.

Document your reasons in a letter of wishes

A letter of wishes is a non-binding document that sits alongside your Will and explains your reasoning. It’s not legally enforceable, but it carries weight.

If you’re leaving unequal shares, write a letter of wishes that sets out why. Be specific. “I have left my son a larger share because he has been my primary caregiver for the past eight years and put his career on hold to support me. I have left my daughter a smaller share because I provided her with $400,000 during my lifetime to purchase a home, which my son did not receive.”

The letter should be factual, not emotional. Avoid language like “my daughter doesn’t deserve more” or “my son has always been my favourite.” Stick to objective facts: contributions, prior assistance, financial need, capability to manage assets.

Sign and date the letter, and store it with your Will.

Consider lifetime transfers to equalise or clarify

Sometimes the best way to manage unequal inheritance is to make the transfers during your lifetime, so the reasons are transparent and the impact is immediate.

If you want to give one child the business, consider transferring it now (subject to appropriate tax and asset protection advice). If you’ve already given one child substantial financial help, consider making equivalent gifts to the others now, or documenting the prior gifts clearly so everyone knows the score.

Lifetime transfers also reduce the size of your estate, which can reduce the risk and potential success of a family provision claim.

But be careful: lifetime transfers can trigger capital gains tax, stamp duty, and loss of principal place of residence exemptions if not structured properly. This isn’t a decision you make casually; it needs integrated tax, legal and succession advice.

Align your Will with your superannuation and trust structures

Your Will only controls assets you own personally. It doesn’t control your superannuation (that’s governed by binding death benefit nominations) or assets held in trusts (those are governed by the trust deed and the trustee’s discretion).

If you leave unequal shares in your Will but your super pays out equally, or your trust distributes income differently, you’ve created confusion and potential conflict.

Review all your structures together. Make sure your binding nominations, your trust deed succession clauses, and your Will are all pointing in the same direction.

Get advice early, not after you’ve decided

The worst time to get legal advice is after you’ve already told your children what they’re inheriting. Once expectations are set, changing course creates conflict.

If you’re even considering unequal shares, talk to your advisers before you talk to your family. Work through the legal risks, the tax implications, and the practical mechanics of what you’re proposing. Then, if appropriate, have the family conversation with clarity and confidence.

How to Reduce the Risk of Disputes Between Your Children

Even well-planned unequal gifts can trigger disputes if the process feels unfair or opaque. Here’s how to reduce that risk.

Communicate your intentions, but choose the timing carefully

Should you tell your children what they’re inheriting?

There’s no universal answer. In some families, transparency reduces anxiety and builds understanding. In others, it triggers conflict immediately.

If you’re leaving unequal shares for clear, defensible reasons (one child in the business, one child already financially supported, one child with ongoing care needs), explaining those reasons during your lifetime can prevent a challenge later. It gives your children time to process, ask questions, and accept the logic.

But if you’re dealing with estrangement, blended family conflict, or a child you know will react badly regardless of reasoning, premature disclosure can make things worse.

The key is to assess your family dynamics honestly. If you think a conversation will help, have it. If you think it will escalate conflict, focus on clear documentation instead and let your executors manage the explanation.

Use an independent executor, not a sibling

If one of your children is receiving more than the others, do not make that child your executor.

The child who benefits most should not be the person making decisions about everyone else’s entitlements. It creates an immediate conflict of interest and guarantees resentment, even if the executor acts with complete integrity.

Appoint an independent executor: a trusted adviser, a professional trustee, or a law firm. Independence costs money, but it’s a fraction of the cost of litigation between siblings.

Build in flexibility where you can

Rigid structures create problems. If you’re leaving a business to one child and property to another, consider whether you want to give your executor discretion to adjust distributions if values shift materially between the date of your Will and the date of your death.

For example: “If the value of the business exceeds the value of the property by more than 20 per cent at the date of my death, my executor may make an equalising payment to my daughter from the residue of the estate.”

That kind of flexibility can prevent disputes over value imbalances caused by market movements you couldn’t predict.

Don’t place a child in an impossible position

If you’re leaving unequal shares, think carefully about what you’re asking of the child who benefits most.

Are they going to be blamed by their siblings? Are they going to spend years defending a decision they didn’t make? Are you putting them in a position where they have to choose between their inheritance and their family relationships?

Sometimes the kindest thing you can do is structure the inheritance so the child who benefits doesn’t have to fight for it. That might mean appointing an independent executor, or making the distribution through a trust where the trustee (not the beneficiary) makes the decisions.

Think about your children’s relationships with each other, not just their relationships with you.

What to Do Now If You’re Planning Unequal Shares

If you’ve reached this point and you’re thinking seriously about leaving different amounts to your children, here’s your roadmap.

First, list your assets with current values. You can’t plan a fair distribution if you don’t know what you’re distributing. Include business interests, property, super, trusts, and any other material holdings. Update this list annually.

Second, write down why you’re considering unequal shares. Be honest and specific. “I want to leave the business to my daughter because she’s worked in it for twenty years and the others have no interest or capacity to run it. I want to leave equivalent value in property and investments to my sons.” That clarity is your starting point.

Third, talk to your advisers before you talk to your family. Get integrated advice: legal structure, tax implications, asset protection, and dispute risk. Make sure your Will, your super nominations, and your trust arrangements all align.

Fourth, document your reasoning. Whether that’s through a letter of wishes, a statutory declaration, or notes prepared with your lawyer’s assistance, create a written record of why you’ve made the decisions you’ve made.

Fifth, consider whether a family conversation is appropriate. If your family can handle it, explaining your reasoning during your lifetime often prevents conflict later. If you’re unsure, your advisers can help you assess whether that conversation will help or harm.

Sixth, review regularly. Circumstances change. Asset values shift. Relationships evolve. Your Will isn’t a set-and-forget document. If you’ve planned unequal shares, review the structure every two to three years to make sure it still makes sense.

And if you’re unsure where to start, that’s the conversation to have with your legal advisers now. Not in five years. Not after a health scare. Now.

Because the cost of getting this wrong isn’t measured in legal fees. It’s measured in family relationships destroyed, businesses sold at a loss, and years of litigation over decisions that should never have been ambiguous.

Disclaimer: This article provides general information only and does not constitute legal advice. Estate planning and family provision law are complex and vary by jurisdiction. You should obtain specific advice tailored to your circumstances before making decisions about your Will or estate structure. Aptum Legal is a litigation-only firm; for estate planning advice, we recommend consulting with a specialist estates lawyer.