Child Support in Australia: What It Covers (and What It Doesn't)

Child Support in Australia: What It Covers (and What It Doesn't)

Many separated parents assume child support covers everything. It doesn't. And that gap — between what Services Australia collects and what raising a child actually costs — is where most financial conflict starts.

What the Standard Assessment Covers

The formula administered by the Child Support Agency (CSA) — now part of Services Australia — calculates a periodic payment based on both parents' taxable incomes, the number of children, and the percentage of care each parent provides. The money is intended to cover the everyday costs of raising a child: food, housing, utilities, clothing, basic transport, and a modest allowance for ordinary activities.

It is not calculated by adding up receipts. It is a formula. And it is deliberately broad.

What It Doesn't Cover — and Where the Trouble Starts

The standard assessment generally does not include:

• Private school fees, unless specifically ordered by a court or agreed in a binding child support agreement
• Extracurricular activities — sports registration, music lessons, tutoring, school camps
• Major medical and dental expenses — orthodontics, psychology, specialist appointments beyond Medicare gaps
• School uniforms, laptops, and technology beyond the basic allowance
• Travel costs for handovers, especially interstate arrangements

These are what Services Australia calls "non-periodic expenses" — and unless you've documented an agreement about who pays what, they become a recurring source of tension.

Binding vs Limited Child Support Agreements

You can formalise how these extras are covered through a child support agreement. There are two types:

• Limited agreements require both parents to obtain legal advice and be broadly satisfied the arrangement is fair. They can be terminated after three years.
• Binding agreements are harder to set aside and require each parent to have independent legal advice before signing.

Both can specify how non-periodic expenses are split — percentages, caps, or case-by-case approval. Without one, you're relying on goodwill. And goodwill, post-separation, is not a reliable budgeting tool.

The Change of Assessment Pathway

If your co-parent's income doesn't reflect their actual earning capacity — or if they're refusing to contribute to costs the formula doesn't capture — you can apply to Services Australia for a Change of Assessment. This process, governed by the "special circumstances" provisions (formerly the ten reasons under s98C of the Child Support (Assessment) Act), takes months and requires evidence. Receipts help. Bank records help. Screenshots of text messages do not.

Managing the Gap

The non-periodic expenses trap catches otherwise reasonable parents. One pays the orthodontist bill expecting to be reimbursed. The other says they never agreed to it. There's no receipt, no record of the conversation, and suddenly a $4,000 expense becomes a $4,000 dispute.

Tracking what child support doesn't cover — and keeping receipts — is how you avoid re-litigating the same expenses every term. CoParentOS gives you a shared expense ledger with timestamped receipt uploads, so when a bill comes in, both parents see it, agree to it (or don't), and the record is there for the future.