Sole Custody vs Joint Custody in Australia: What the Law Actually Says

If you have been searching for "sole custody" or "joint custody" in an Australian context, the first thing you need to know is that neither term has any legal standing here. Australian family law abandoned these American-derived concepts years ago, and using them in court filings can trigger requests for amendment from FCFCOA registrars.

Understanding what the law actually uses — and why the distinction matters practically — is the starting point for any parenting arrangement.

The Correct Australian Terms

The Family Law Act 1975 uses two separate concepts where US law bundles everything under "custody":

Parental responsibility covers decision-making authority for major long-term issues: schooling, major medical treatment, religious upbringing, name changes, and international travel. This is roughly equivalent to what Americans call "legal custody."

Living arrangements (care time) describes the physical time a child spends with each parent — which days, which nights, and how changeovers work. This replaces what Americans call "physical custody," "residence," and "visitation."

These two dimensions are independent. A parent can have sole decision-making authority while sharing care time equally. Or both parents can share decision-making while the child lives primarily with one parent. The court tailors each dimension separately based on what serves the child's best interests.

What Changed in May 2024

The Family Law Amendment Act 2023 (effective 6 May 2024) removed the old presumption of "equal shared parental responsibility." Before this reform, the law assumed both parents should share major decisions jointly unless proven otherwise, and courts were then required to consider equal time or "substantial and significant time."

That dual presumption is gone. Courts now start from a blank slate on every case. There is no default time split, no automatic assumption about shared decision-making. Every arrangement is assessed individually under the simplified Section 60CC best interests factors, with child safety as the paramount consideration.

When One Parent Gets Sole Decision-Making

The court may allocate sole decision-making authority when:

• One parent has a history of family violence, abuse, or neglect
• There is a severe communication breakdown making joint decisions practically impossible
• One parent consistently undermines agreed arrangements or makes unilateral decisions
• Geographical distance makes consultation on time-sensitive decisions impractical

Sole decision-making does not mean the other parent loses contact with the child. A parent can have no decision-making authority but still have regular, meaningful care time.

When Care Time Is Shared Equally

Equal care time (50/50 splits) works well when parents live close to each other, communicate effectively enough to coordinate school and extracurricular schedules, and the child is developmentally ready for frequent transitions. For school-age children in stable co-parenting relationships, alternating weeks or 2-2-5-5 schedules are common.

For infants and toddlers, developmental research supports shorter, more frequent visits rather than extended overnight stays — the emphasis is on maintaining attachment security with the primary caregiver while building a bond with the other parent.

What This Means for Your Parenting Plan

When drafting your parenting plan or consent orders, address both dimensions explicitly:

1. Decision-making: State who makes decisions about each major long-term issue, or whether both parents must consult
2. Care time: Specify the exact weekly schedule, holiday arrangements, and changeover details

Using the correct statutory language from the start avoids delays and demonstrates to the court that you understand the current legal framework.

The ACT Child Custody & Parenting Plan Guide includes a decision-making authority worksheet and age-appropriate schedule templates aligned with the post-May 2024 best interests framework.

See more Australian Capital Territory guides →