7 Reasons Why a Parent Might Not Get Joint Custody in the UK

When custody arrangements are decided in the UK, the court’s primary focus is always the child’s best interests. Joint custody - also known as shared parental responsibility - is often preferred, but it’s not guaranteed. Decisions are shaped by a complex mix of evidence, behaviour, and the child’s overall welfare. Some parents find themselves excluded from shared custody because of factors that weigh heavily against their ability to provide a stable, safe, or nurturing environment.
This isn’t about punishing a parent; it’s about safeguarding the child’s well-being. And in many cases, the reasons are far more nuanced than people assume.
What Do UK Courts Consider When Granting Custody?
To understand why joint custody might be denied, it’s important to first consider how UK family courts operate. They follow the principle that a child’s welfare is paramount, assessing every case individually under the Children Act 1989. Judges look beyond surface-level arguments, probing into each parent’s ability to meet a child’s emotional and physical needs.
Factors like living arrangements, school stability, and even how well parents communicate with each other can influence outcomes. If one parent demonstrates a pattern of behaviour that disrupts or endangers the child’s life, shared custody may not be an option.
For anyone navigating these issues, early support with legal family matters can make a significant difference in understanding your rights and responsibilities.
1. A History Of Abuse Or Neglect
Not only is a documented pattern of abuse or neglect a serious concern, but it can also completely override any argument for joint custody. Courts examine past incidents - whether physical, emotional, or verbal - and assess the likelihood of future harm. Even unproven allegations can complicate proceedings if they are credible and supported by evidence such as medical reports or witness statements.
2. Substance Misuse Or Addiction
A parent struggling with alcohol or drug dependency may face significant challenges in gaining joint custody. It’s not simply the addiction itself but how it impacts the child’s safety and routine. If substance misuse creates unpredictable behaviour or neglectful care, courts often favour sole custody with supervised visitation until the parent can show substantial rehabilitation.
3. Unstable Living Conditions
Courts favour consistency and security. If a parent lacks stable housing or frequently changes living arrangements, it can undermine their ability to provide a reliable environment. A clean, safe home doesn’t need to be luxurious - but it must meet basic standards of comfort and safety. Parents undergoing divorce often have related concerns, like who gets the house in a divorce, which can directly affect child custody outcomes.
4. Inability To Co-Parent Effectively
Joint custody relies on communication and cooperation. If one parent refuses to share information, undermines the other’s role, or engages in conflict that disrupts the child’s life, judges take notice. Not only does high conflict create stress for the child, but it also signals that shared parenting might not be in their best interests.
5. Mental Health Concerns

This isn’t about discriminating against mental illness - it’s about the level of care and stability a parent can provide. A parent with untreated or severe mental health issues might struggle to maintain the child’s routine, attend to their emotional needs, or ensure their safety. Courts typically look for evidence of ongoing treatment or support to determine whether the parent can handle joint responsibilities.
6. Relocation Or Distance Issues
If one parent plans to move far away - especially internationally - shared custody becomes difficult to manage. While video calls and technology help maintain contact, the practicalities of schooling, travel, and time zones often push courts toward awarding sole custody to the parent who can provide continuity of care.
7. Failure To Prioritise The Child’s Needs
Sometimes the issue isn’t as obvious as abuse or addiction. It could be a repeated failure to put the child’s needs first. This includes ignoring medical appointments, failing to attend school meetings, or prioritising personal interests over parenting duties. Courts want to see consistent involvement and genuine concern for the child’s development.
Closing Thoughts
Child custody disputes are rarely straightforward. UK courts aim to ensure the child’s welfare is front and centre, even if that means limiting a parent’s involvement. Not only is this approach protective, but it also encourages parents to address the issues that stand in the way of joint custody.
For anyone facing these challenges, seeking support with legal family matters can provide clarity and help build a stronger case. Each situation is unique, but understanding these seven key reasons can shed light on why joint custody might not always be granted.