By Melita Lloyd, Family Law Solicitor, The Legal Drafter · Australia-wide · 15+ years in family law | Updated October 2026
Plenty of separated parents work out child support between themselves: a set amount each fortnight, school fees split down the middle, one parent covering health insurance. When it works, it saves time, money and conflict. The trouble is that a verbal or informal written arrangement is very hard to enforce in Australia, and it tends to fall apart at exactly the moment it’s needed, when someone loses a job, re-partners, or simply stops paying.
In a nutshell: To make a private child support arrangement enforceable, register it with Services Australia as a limited or binding child support agreement. Consent orders are the tool for property and parenting arrangements, but a court generally can’t make periodic child support orders where a child support assessment could be sought, so don’t rely on consent orders alone for child support.
Why Informal Arrangements Are Risky
Around half of families receiving child support use Private Collect, where parents pay each other directly without Services Australia handling the money. Reporting in 2026 on a government survey found that more than half of those parents were underpaid and about one in four received nothing in the year. The full scale isn’t known: when the Commonwealth Ombudsman reported in June 2025 that more than $1.9 billion in Child Support Collect debt was outstanding as at 31 December 2024, it noted that unpaid amounts under Private Collect aren’t tracked at all.
If there’s no assessment or registered agreement behind your arrangement, there’s generally nothing for Services Australia to enforce when payments stop. Even with an assessment in place, a parent switching from Private Collect to Agency Collect can usually have only recent missed payments collected. Informal payments made directly to the other parent, or to third parties like a school, may also not count toward an assessed amount unless an agreement says so.
Your Options for Making It Enforceable
| Limited child support agreement | Binding child support agreement | |
| Assessment needed first? | Yes, an administrative assessment must already be in place | No (except for lump-sum agreements) |
| Amount | At least the annual rate under the assessment | Any amount, including less than the formula |
| Legal advice | Not required | Each parent needs independent legal advice and a signed certificate |
| Flexibility | Can end after 3 years, if the assessment changes by more than 15%, by written agreement, or by court order | Ends only by a new agreement, written termination (with legal advice), or court order |
| Best for | Parents who want the formula amount (or more) on more flexible terms | Parents who want certainty, a different amount, or lump-sum or property arrangements |
These rules come from the federal Child Support Guide and Legal Aid Queensland. Agreements can’t be varied, only terminated and replaced, so get the terms right the first time.
School fees, property and other non-cash support
Agreements can cover more than fortnightly cash. Under the Child Support Guide, payments to third parties such as school fees reduce the assessed rate only if the agreement states by how much (for example, a stated percentage of each payment). A transfer of property can be credited as a lump sum against future child support, but only under a binding agreement that says so, with an assessment in force. Vague wording is the most common reason these arrangements don’t work as intended.
Where Consent Orders Fit
Consent orders are made by the Federal Circuit and Family Court of Australia when separating parents agree on property division and parenting arrangements. Once made, they have the same force as orders made after a hearing. Understanding how to apply for consent orders is useful when you are finalising property and parenting at the same time as child support.
There’s an important limit, though. Under section 66E of the Family Law Act, as the Child Support Guide explains, a court can’t make a child maintenance order where a parent could properly apply for a child support assessment. Periodic child support terms in a parenting plan or order made in that situation have no effect. A consent order or signed agreement can sometimes also meet the requirements of a child support agreement, but only if it is drafted to do so and accepted by the Registrar. In most cases, the safest approach is a child support agreement alongside consent orders for property and parenting.
Settle the Parenting Schedule First
The child support formula is linked to the percentage of care each parent provides, so the parenting schedule directly affects the numbers. Since 6 May 2024, the Family Law Act no longer presumes equal shared parental responsibility, and courts use a shorter list of best-interests factors. Agree on care arrangements before fixing a child support amount.
If you can’t agree on parenting, family dispute resolution is generally required before you can apply to court for parenting orders, unless an exception such as family violence or urgency applies. A mediator can also help settle the practical costs that informal deals often miss: medical gaps, extracurricular activities, uniforms and technology.
Changes Coming to the Child Support System
The 2026-27 federal Budget committed $182.6 million to child support reforms aimed at financial abuse and non-payment. Most measures are scheduled to start on 1 July 2027, not 2026. They include stronger protections for parents in private arrangements, an easier path from Private Collect to Agency Collect with recovery of debts from the previous three months (nine in special circumstances), and Departure Prohibition Orders for people with child support debts of $10,000 or more who have travelled overseas more than once in the past two years. Several measures depend on legislation, and a related Bill was before Parliament in October 2026.
A Practical Sequence
- Agree on the parenting schedule and care percentages.
- Get a child support assessment if you plan a limited agreement, or to understand the formula amount before a binding one.
- Decide which agreement fits, and list every cost it should cover, including how third-party payments are credited.
- For a binding agreement, each parent sees a separate lawyer for independent advice. This guide on choosing a family lawyer in Sydney covers what to look for.
- Lodge the signed agreement with Services Australia, and file consent orders for property and parenting if needed.
If you’re also planning a divorce, remember it’s a separate application with its own waiting period; this overview of how long a divorce takes in Queensland explains the timing.
Common Questions
Is a private child support agreement legally binding in Australia?
Not unless it is a limited or binding child support agreement accepted by Services Australia. Informal verbal or written arrangements are generally not enforceable.
Can consent orders include child support?
Generally not as periodic child support where an assessment could be sought. A consent order may sometimes also qualify as a child support agreement if it meets the legal requirements, but most parents use a separate child support agreement.
Do I need a lawyer for a child support agreement?
Not for a limited agreement. For a binding agreement, each parent must get independent legal advice and a signed certificate.
Disclaimer
This article is general information about Australian child support and family law and is not legal advice. Reading it does not create a lawyer-client relationship. Child support rules and the reforms described here may change. Get advice about your own circumstances from an Australian family lawyer or Services Australia.
