Parents agree on child support arrangements between themselves every day. Some of those arrangements last years without a problem. Others fall apart the first time one parent’s circumstances change, and the family is left with nothing enforceable, a dispute that costs far more to fix than it would have cost to formalise properly in the first place.
The question is not really “can we agree? ” You almost certainly can. The question is what kind of agreement you are making, what protection it gives you, and what happens if the other parent stops paying or wants to change the terms two years from now.
Most people assume that if they have both agreed, and maybe even exchanged messages about it, that is enough. It is usually not. An informal arrangement carries real risk, even when both parents are genuinely trying to do the right thing by their children.
The law gives parents three distinct options. Each one comes with different requirements, different flexibility and different consequences if things go wrong. Knowing which one suits your situation is the decision that actually matters.
By the end of this article, you will understand the difference between your options, what each one can and cannot do, and how to put something in place that you can rely on.
Key Takeaways
- Private child support agreements are legal in Australia. Parents can arrange payments between themselves without going to court, but informal arrangements carry real enforcement risk.
- There are three options. An informal arrangement, a Limited Child Support Agreement and a Binding Child Support Agreement each offer different levels of protection and flexibility.
- A Binding Child Support Agreement requires independent legal advice. Both parents must each obtain advice from a separate lawyer before signing. Without it, the agreement is not valid.
- A private agreement can cover more than regular cash payments. School fees, health insurance, medical costs and other agreed expenses can all be included if the agreement is drafted carefully.
- Changing a Binding Child Support Agreement is not straightforward. It generally requires either a new agreement or a court order. Sign it knowing that it is designed to be difficult to undo.
- Family violence or financial pressure changes everything. Private negotiation may not be appropriate where one parent feels unsafe or coerced. Independent advice before signing is essential.
Can parents make a private child support agreement in Australia?
Yes. Parents can make child support arrangements privately, without going to court and without involving Services Australia. The child support scheme is designed to allow this, and many families prefer it because it gives them more control over the terms.
What changes is the legal weight of the arrangement. A private agreement that is properly formalised as a Limited or Binding Child Support Agreement is recognised under the child support scheme and can be enforced if payments stop. An informal arrangement, even one that has been working smoothly for years, is much harder to act on when things go wrong.
The honest answer to “can we agree privately? ” is yes, and the follow-up question you should ask immediately is: which type of agreement are we actually making?
Key Point: The fact that both parents have agreed does not make the arrangement legally enforceable. What gives it legal weight is how it is documented and whether it meets the requirements of the child support scheme.
What are the three ways parents can arrange child support?
Child support arrangements in Australia generally fall into one of three categories.
First, an informal arrangement. This is where parents agree between themselves how much will be paid, when and how. There is nothing written, or perhaps just a message thread or a shared spreadsheet. Nothing is registered with Services Australia. Nothing requires independent legal advice. If it works, it works. If it stops working, you may have little to enforce.
Second, a Limited Child Support Agreement. This is a written agreement that is registered with Services Australia. It generally requires a child support assessment to already be in place, and the agreed amount must not be less than the assessed amount. It can be ended by either parent after 12 months with written notice, which makes it more flexible than a Binding Agreement.
Third, a Binding Child Support Agreement. This is the most formal option. It can set an amount above or below the assessed amount, or it can set no periodic amount at all. Both parents must each obtain independent legal advice before signing. A certificate from each lawyer is required for the agreement to be valid. Ending or changing a Binding Agreement is significantly harder than ending a Limited Agreement.
A short comparison may help:
- Limited Agreement: requires a current assessment, minimum amount applies, no mandatory legal advice, ends with 12 months’ notice.
- Binding Agreement: no assessment required, any amount can be agreed, independent legal advice is mandatory for both parties, hard to vary or terminate.
Which one is right depends on your situation, your income arrangements and how much certainty you each need.
Expert Tip: If you and the other parent are broadly on the same page and both earning reasonably stable incomes, a Limited Agreement is often the faster, lower-cost path. If income is complex, one parent earns significantly more, or the agreed amount is well above or below the assessed figure, a Binding Agreement with careful legal advice is usually the right call.
What is the difference between a Binding and a Limited Child Support Agreement?
The core difference is legal permanence and the requirement for independent advice.
A Limited Child Support Agreement can be written without either parent seeing a lawyer. That sounds like a convenience, but it also means neither parent has been advised about what they are agreeing to. Either parent can bring it to an end after 12 months by giving written notice. That exit right is useful if your circumstances change, but it also means the other parent can end the arrangement when it suits them, not you.
A Binding Child Support Agreement is the opposite. Each parent must have their own lawyer read the agreement and provide written advice about the effect of signing it. The lawyer then signs a certificate confirming that advice was given. Without those two certificates, the agreement is not a valid Binding Agreement. With them, it is enforceable, and it is very difficult to exit without the other parent’s agreement or a court order.
The limited agreement binding agreement requirements distinction matters most when one parent’s income is high, when the agreed amount is significantly different from the assessed amount, or when you want a long-term arrangement that neither parent can simply walk away from.
Do not assume that a Binding Agreement is always the stronger choice. For some families, the flexibility of a Limited Agreement is exactly what is needed. The right choice depends on your specific circumstances, not on which agreement sounds more official.
Key Point: Mandatory independent legal advice for a Binding Agreement is not a formality. It exists because the agreement is designed to be difficult to undo. Both parents should genuinely understand what they are signing before they sign it.
When is a Binding Child Support Agreement the right option?
A Binding Child Support Agreement is worth considering in these situations:
- One parent earns a very high income and the assessed amount does not reflect the family’s actual standard of living.
- Parents want to agree on an amount below the assessed figure, for example where substantial non-cash support is being provided instead.
- The child has significant ongoing medical needs or disability costs that need to be built into the arrangement.
- Both parents want certainty and neither wants the other to be able to end the arrangement on 12 months’ notice.
- There are complex financial arrangements, including self-employment, trusts or business income, that make the standard assessment less reliable.
The binding child support agreement requirements are non-negotiable: a signed agreement, a certificate of independent legal advice from each parent’s own lawyer, and a written agreement that identifies itself as a Binding Child Support Agreement under the child support legislation.
If the document has not been prepared and executed properly, it is not a Binding Agreement, regardless of what it says at the top.
Expert Tip: If you’re looking at a document that the other parent has drafted, or that someone downloaded from the internet, get it reviewed before you sign anything. A document that looks like a Binding Agreement is not a valid one if the legal requirements have not been followed.
Do we both need separate lawyers for a Binding Child Support Agreement?
Yes. Each parent must have their own independent lawyer. That means two different law firms, two separate advice sessions and two signed certificates.
The lawyer advising one parent cannot advise the other. This is not a technicality. The requirement exists because the agreement is legally binding and difficult to exit, and the law requires that both parents understand what they are agreeing to before they sign.
If you sign a Binding Child Support Agreement without obtaining the required independent legal advice, the agreement can be set aside. That means neither parent has the certainty the agreement was meant to provide, and you may find yourself back at the beginning, except now the relationship is more strained and the legal costs are higher.
This is one of the most common mistakes families make: they prepare a document together, both sign it in good faith, and then discover months later that it is not enforceable because the advice requirements were not met.
Key Point: Two lawyers are not optional for a Binding Child Support Agreement. They are a legal requirement. If cost is a concern, discuss it with your lawyer before skipping the step, not after the agreement has already been signed.
Can we agree on an amount different from the child support assessment?
It depends on which type of agreement you are making.
For a Limited Child Support Agreement, the agreed amount must generally be equal to or greater than the current child support assessment. You cannot use a Limited Agreement to agree on less than the assessed amount. A current assessment must also be in place before a Limited Agreement can be registered.
For a Binding Child Support Agreement, there is no floor. You can agree on an amount above or below the assessed figure, or you can agree on no periodic payment at all and substitute non-cash support instead. This flexibility is one of the main reasons some families choose the Binding Agreement path, but it comes with the mandatory advice requirements discussed above.
If there is no assessment in place and you want to formalise a private arrangement quickly, a Binding Agreement is generally the only formal option available to you.
Expert Tip: If the standard child support assessment doesn’t reflect the real financial picture, for example because one parent is self-employed or receives income through a trust, a Binding Agreement lets you negotiate an amount that actually matches your circumstances. That flexibility is worth the extra step of obtaining legal advice.
What can a private child support agreement cover?
Private child support agreements can cover more than a regular weekly or fortnightly cash payment. The law allows agreements to include:
- periodic payments, meaning regular cash payments on a set schedule
- lump sum payments
- non-periodic expenses, which are one-off or irregular costs rather than regular payments
Non-periodic expenses can include private school fees, private health insurance premiums, medical and dental costs, childcare fees, extracurricular activities and other agreed expenses.
The key is precision. A clause that says “the father will pay school fees” is not enough. A well-drafted agreement will say which school, which fees are included (tuition, uniforms, excursions, levies), when payment is due, who receives the invoice, what happens if fees increase and what happens if the child changes school.
Vague language about expenses is one of the most reliable ways to end up back in dispute. If you are including non-cash or non-periodic items, get them described properly.
Expert Tip: Think about what the arrangement needs to cover not just today, but in three years. Children’s needs change. A good agreement anticipates the likely pressure points, like school transitions, medical costs and extracurricular activities, rather than leaving them to be renegotiated later.
Does my child need to spend 35% of their time with me to receive child support?
The 35% threshold is relevant to the child support assessment formula, not to what parents can agree between themselves in a private agreement.
In the assessment formula, the care percentage affects the amount calculated. Once a parent provides at least 35% of care, the formula adjusts to reflect shared day-to-day costs. Below that threshold, the parent providing primary care receives the full assessed amount.
In a private agreement, particularly a Binding Agreement, you can agree on any arrangement you choose, regardless of the care percentage. The parties are not bound by the formula result.
This is a common source of confusion. The 35% figure shapes what Services Australia calculates, but it does not prevent parents from agreeing on a different outcome through a properly documented agreement.
Key Point: If your care arrangement doesn’t fit neatly into the standard formula, a private agreement gives you the flexibility to reflect what is actually happening in your family’s life.
How do private child support payments work?
Once you have a formal agreement in place, you have two collection options.
Private collect means you transfer money directly between yourselves. The paying parent pays directly to the receiving parent’s account, or pays a third party such as a school directly. Services Australia is not involved in transferring money, although the agreement can still be registered with them.
Child support collect means Services Australia collects payments from the paying parent and transfers them to the receiving parent. This option adds an administrative layer, but it also means Services Australia can pursue the paying parent if payments are missed.
Many families on the Gold Coast prefer private collect because it is simpler and avoids the administrative lag. That is a reasonable choice when both parents are reliable and the relationship is workable. If there is a history of missed payments, or you have concerns about the other parent’s reliability, child support collect through Services Australia gives you a collection mechanism that you do not have to manage yourself.
You can switch collection methods after the agreement is in place. It is not a permanent decision, and circumstances often change.
Expert Tip: If you are choosing private collect, keep records. Bank statements showing each payment, the date and the amount are your evidence if the arrangement is ever disputed. Do not rely on memory.
Can we make a private agreement without involving Services Australia?
Yes. An informal arrangement, by definition, involves no government agency at all. You agree, you pay, you receive.
Even a formal Binding Child Support Agreement does not require Services Australia to be involved in the payment process. You can register the agreement with Services Australia, which formally brings it into the child support scheme and gives access to enforcement options, or you can leave it unregistered and handle everything privately.
The risk of an entirely private arrangement is enforcement. If the paying parent stops paying, an unregistered informal arrangement leaves you with limited immediate recourse. A registered agreement gives you access to Services Australia’s collection and enforcement tools.
If you want to keep the process as private as possible but still have legal protection, a registered Binding Child Support Agreement is usually the best of both: formalised terms, legal enforceability, but payments made directly between parents without Services Australia acting as the intermediary.
Key Point: Keeping government out of the day-to-day arrangement is entirely possible. But keep them out of the enforcement mechanism and you carry the risk yourself if the arrangement breaks down.
What happens if the other parent stops paying?
What you can do depends almost entirely on how the arrangement was documented.
If you have an informal arrangement with no registered agreement, your options are limited. You may be able to apply for a formal child support assessment through Services Australia, which will give you access to collection tools going forward, but it will not necessarily recover past payments.
If you have a registered agreement, Services Australia can take collection action. This can include contacting the other parent, intercepting tax refunds, garnishing wages or other enforcement steps.
If you have a Binding Child Support Agreement, you also have the option of seeking a court order requiring compliance. This is a more significant step, and one that requires legal advice about whether it is proportionate and likely to be effective.
The practical sequence when payments stop: check exactly what the agreement says, preserve every record of what was owed and what was paid, communicate in writing where it is safe to do so, and get legal advice before making assumptions about what you can and cannot recover.
Expert Tip: A missed payment feels like a personal betrayal. It is also a legal question. The two need to be handled separately. Get the facts clear before deciding on a course of action.
Can a private child support agreement be changed or cancelled?
A Limited Child Support Agreement can be ended by either parent after 12 months with written notice. It can also be ended earlier by mutual agreement, or if a new agreement is registered.
A Binding Child Support Agreement is much harder to exit. It can be ended in any of these ways:
- both parents agree in writing to end it
- a court makes an order setting it aside, which requires grounds such as fraud, duress, unconscionable conduct, or a significant change in circumstances that makes the agreement unjust
- a new Binding Agreement is entered into that replaces the earlier one
You cannot simply walk away from a Binding Agreement because your circumstances have changed and the terms now feel inconvenient. That is, by design, the point of a Binding Agreement. If the arrangement was fair when you signed it and both parents had proper legal advice, it is designed to hold.
This is exactly why the advice requirement matters. Before you sign a Binding Agreement, you need to understand that you may not be able to change it later, even if your income drops significantly.
Key Point: A Binding Child Support Agreement is not a flexible arrangement with legal backing. It is a fixed arrangement. Do not sign it unless you are confident you can live with the terms for the foreseeable future.
What if our financial or care circumstances change after we sign?
Changing circumstances do not automatically change a Binding Agreement. This is the detail that catches many people by surprise.
If one parent loses their job, receives a significant pay rise, or the care arrangement changes substantially, the agreement does not automatically adjust. The paying parent cannot simply reduce their payments because they are earning less. The receiving parent cannot simply demand more because the other parent is earning more.
For a Limited Agreement, there is more flexibility because either parent can give notice to end it after 12 months, and then apply for a fresh assessment or enter a new agreement.
For a Binding Agreement, you generally need to negotiate a new agreement (which means new legal advice and new certificates) or apply to a court for it to be set aside.
If you are self-employed, or your income varies significantly, or you anticipate major changes to your care arrangement, build review mechanisms into the agreement from the beginning. A lawyer who regularly handles child support matters on the Gold Coast can help you think through what provisions are worth including before the agreement is signed, rather than after a dispute arises.
Expert Tip: Think about what your finances and your care arrangement might look like in 18 months. If the answer is “significantly different from today”, that should inform which type of agreement you sign and what review provisions you include.
What if there is family violence or pressure to sign?
Private negotiation is not appropriate for every situation.
Where there is a history of family violence, coercion, financial control or a significant imbalance in power between parents, the process of negotiating and signing a private agreement carries real risk. A person who agrees to terms because they are frightened, exhausted or financially dependent is not giving genuine informed consent.
A court can set aside a Binding Agreement if it was signed under duress or unconscionable pressure. But that requires a court application, legal costs and time. Prevention is a better answer than remedy.
If you feel unsafe, if you are being pressured to sign something quickly, or if the other parent is controlling the information you have access to, speak with a lawyer confidentially before you respond to any document. The requirement for independent legal advice in a Binding Agreement exists partly to create that protected space.
If you are on the Gold Coast and your safety is a concern, seek advice first. You do not have to respond to a document until you have spoken to someone you trust.
Key Point: If you are being rushed to sign, that is a reason to slow down, not to comply. A legitimate private agreement does not require one parent to act under pressure.
How long does it take to put a private child support agreement in place?
A Limited Child Support Agreement can often be put in place within a few weeks, assuming a child support assessment is already in place and both parents are ready to sign.
A Binding Child Support Agreement takes longer because both parents need to obtain independent legal advice and the agreement must be drafted carefully. If both parents engage lawyers promptly and the terms are broadly agreed, the process can take four to eight weeks. If there is significant negotiation, financial disclosure or disagreement about terms, it will take longer.
The biggest variable is not the lawyers. It is how quickly both parents are ready to make decisions and how much remains to be negotiated.
Key Point: If you want a formal agreement in place before school fees are due, or before a change in care takes effect, start the process early. Last-minute agreements tend to be rushed ones.
How much does it cost to make a private child support agreement?
Cost depends on complexity, the type of agreement and how much negotiation is involved.
A Limited Child Support Agreement, where the terms are already agreed, is generally lower cost because neither party is required to obtain legal advice (though advice is still prudent). A Binding Child Support Agreement requires two lawyers and two advice sessions, which increases the cost by definition.
If there is significant financial complexity, business income, disagreement about the right amount or difficult communication between parents, costs increase. If both parents arrive with agreed terms and simply need the agreement properly drafted and executed, costs are lower.
We do not quote fixed fees for child support agreements in this article because complexity varies too widely. What we can say is that the cost of a properly documented agreement is almost always lower than the cost of an enforcement dispute or a court application later.
If you’d like a clear picture of what your situation is likely to involve, book a confidential, no-obligation chat with the C + K Family Lawyers team.
Expert Tip: When comparing the cost of getting an agreement right against the cost of fixing a broken one, the numbers are rarely close. The upfront cost almost always wins.
What information should I prepare before speaking with a child support lawyer?
Bring as much of the following as you can:
- your current income and the other parent’s income, to the extent you know it
- how care of the children is currently arranged, including nights spent with each parent
- whether a child support assessment already exists through Services Australia
- any existing written communications about support, including messages, emails or prior agreements
- details of any significant expenses you expect to cover, such as school fees, health insurance or medical costs
- any concerns about the other parent’s financial transparency or disclosed income
You do not need to have everything in perfect order before you call. A family lawyer’s job is partly to help you identify what matters and what to gather. Come with what you have.
What is the safest way to document a child support agreement?
The safest option is a Binding Child Support Agreement where each parent has received independent legal advice and signed the required certificate.
The next safest is a Limited Child Support Agreement, properly written and registered with Services Australia.
An informal arrangement with a paper trail, bank records and message exchanges is better than nothing, but it is not an agreement in the legal sense. It is evidence of a pattern of conduct. If the arrangement breaks down, that distinction matters.
Do not rely on a document that was not prepared or reviewed by a lawyer. Do not sign a document prepared by the other parent’s lawyer without getting your own advice. And do not sign anything because you feel pressured to resolve things quickly.
Frequently asked questions
Can a private child support agreement replace the child support assessment from Services Australia?
A Binding Child Support Agreement can effectively override the assessment by setting a different amount, including an amount below the assessed figure. A Limited Agreement cannot reduce the amount below the assessed figure. An informal arrangement has no formal effect on the assessment at all.
Will a private child support agreement affect my Family Tax Benefit?
It can. How you arrange child support, including whether you use private collect or child support collect, can affect your Family Tax Benefit entitlements. The rules in this area are detailed and administered by Services Australia and the Australian Taxation Office. Get current advice from Services Australia about your specific circumstances before finalising any arrangement.
Can we include a lump sum payment instead of regular child support?
Yes. A Binding Child Support Agreement can include a lump sum payment arrangement. This can be a practical option in some high-asset separations. It requires careful drafting and independent advice to ensure both parents understand the long-term implications.
What happens to the agreement if one parent moves interstate?
Child support is a federal scheme and applies nationally. The agreement does not become invalid because one parent relocates. Enforcement through Services Australia remains available regardless of where each parent lives in Australia.
If we already have an informal arrangement that has been working for two years, do we need to formalise it?
Not necessarily. But if you want legal protection, if your circumstances are likely to change, or if you have any concern about the other parent’s reliability, formalising the arrangement is worth considering. Two years of smooth payments does not guarantee the next two years will be the same.
What you should do next
A private child support agreement can give both parents certainty and flexibility. The arrangement you choose, and how carefully you document it, determines whether it will hold up when circumstances change.
If you and the other parent are broadly in agreement, the practical next step is to get the terms reviewed and documented properly before anyone signs anything.
If you are not yet in agreement, or if you have concerns about the other parent’s reliability, financial transparency or past behaviour, speaking with a family lawyer before you negotiate is a better starting point than trying to reach agreement first.
The C + K Family Lawyers team on the Gold Coast works with separating parents to negotiate, draft and formalise child support agreements. If you want to understand your options without any commitment, book a confidential, no-obligation chat with us.
This article is general information only and is not legal advice. Family law outcomes depend on your individual circumstances. For advice about your situation, speak with a qualified family lawyer.
About the Author
Christopher (Chris) Jones is the Principal Lawyer and co-founder of CK Family Lawyers, a Queensland family law firm. Chris advises on divorce, property settlement, parenting arrangements, binding financial agreements, mediation and domestic violence matters. After working in legal environments where clients felt depersonalised and lost in jargon, he co-founded the firm with Krystina Jones on the belief that people deserve family lawyers who genuinely care, and he works directly with his clients throughout their matters.
