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How Ontario Courts Decide a Child's Best Interests in Parenting Cases

Learn how Ontario courts weigh a child's best interests in parenting cases: which law applies, the listed factors, family violence, and the child's views.

Family Law5 min readTSLBy the Treadstone Law Team · OntarioUpdated November 1, 2026
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Key takeaways
  • Which statute applies depends on marital status: the Divorce Act for married spouses who are divorcing, and the Children's Law Reform Act for unmarried parents and married parents who are not divorcing.
  • The child's physical, emotional and psychological safety, security and well-being is the court's primary consideration.
  • A court is not bound by agreed parenting terms if they are not in the child's best interests.

If you are separating, one phrase will come up again and again: the best interests of the child. It is the test a judge uses to decide who makes major decisions for a child and how the child's time is divided. Knowing what the test looks at can help you plan, talk to the other parent, and prepare for any court process.

This article explains the test in plain language. It is general information, not advice for your situation. How the factors apply depends on your child and your family, so a lawyer can help you with the details.

Which law applies to you

Two statutes can apply. The federal Divorce Act governs parenting between married spouses who are divorcing. The Children's Law Reform Act (CLRA) applies to unmarried or common-law parents and to married parents who are not divorcing.

The two laws have parallel but separately numbered sections. The best-interests factors are in Divorce Act s. 16(3), and the parallel Ontario list is in CLRA s. 24(3).

The words have changed too. The terms decision-making responsibility and parenting time replaced custody and access. Both laws now use the newer terms, but older orders and agreements still use the old ones, so you may see both sets of words.

Safety and well-being come first

Under CLRA s. 24(2) and Divorce Act s. 16(2), the court's primary consideration is the child's physical, emotional and psychological safety, security and well-being. Every other factor is weighed with that in mind.

Decision-making responsibility covers significant decisions about a child's well-being, including health, education, culture, language, religion and spirituality, and significant extra-curricular activities. The court can give it to one parent, to both, or divide it.

The listed factors

Divorce Act s. 16(3) lists the factors, and CLRA s. 24(3) has a parallel list. In plain terms, they include:

The list is not exhaustive. A court may consider factors that are not on it, while always giving priority to the child's safety.

People often ask about parental alienation. The statutes do not use that word, but willingness to support the child's relationship with the other parent is a listed factor.

Time, conduct and the child's voice

A child should have as much time with each parent as is consistent with the child's best interests. The right amount is worked out for each child rather than by a fixed formula, and it is subject to the child's safety. No fixed schedule by age is set out as the law, so a plan for a teenager may look very different from one for an infant.

The court does not consider a person's past conduct unless it is relevant to their parenting time, decision-making responsibility or contact.

The court considers the child's views and preferences, giving due weight to the child's age and maturity, unless they cannot be ascertained. Under CLRA s. 64, the court must, where possible, take the child's views into account, and it may interview the child. The interview must be recorded.

TopicWhat the law says
Child's viewsGiven due weight for age and maturity
Judge interviewing a childAllowed under CLRA s. 64; must be recorded
Past conductOnly if relevant to parenting
Time with each parentAs much as is consistent with best interests

Questions about how time is shared, and how that connects to other issues such as support, can get complicated. How this applies depends on your situation, so it is worth confirming with a lawyer.

Family violence, agreements and assessments

Family violence means conduct by one family member towards another that is violent or threatening, forms a pattern of coercive and controlling behaviour, or causes fear for safety. It need not be a criminal offence.

When assessing it, the court considers factors such as its nature, seriousness and frequency, any pattern of coercive and controlling behaviour, whether the child was the target or was exposed, harm or risk of harm to the child, fear for safety, and steps taken by the violent person to prevent further violence. Safety terms can include supervised parenting time, and the supervisor must first consent.

Parents can agree on parenting in a separation agreement. But a court may disregard a provision on decision-making responsibility or parenting time if that is in the child's best interests. An agreed plan never binds the court on these issues.

In some cases the court may appoint a qualified professional to assess the child's needs and each party's ability to meet them, and may draw inferences if a party refuses to attend. The court may also involve the Office of the Children's Lawyer, an independent law office within the Ministry of the Attorney General.

What to do next

A lawyer can explain how these factors may apply to your family and what to expect.

Frequently asked questions

Does the court start from equal time with each parent?

The principle is that a child should have as much time with each parent as is consistent with the child's best interests. The right amount depends on the individual child's circumstances and is subject to the child's safety. How this applies to your family depends on your situation, so it is worth confirming with a lawyer.

Will a judge ask my child what they want?

The court must, where possible, take the child's views and preferences into account to the extent the child can express them. It may interview the child, and the interview must be recorded. The weight given depends on age and maturity.

Is the list of best-interests factors complete?

No. A court may consider factors that are not on the list, while always giving priority to the child's safety.

Does past conduct count against a parent?

Only if it is relevant to their parenting time, decision-making responsibility or contact. Family violence is a separate listed factor.

This article is general information, not legal advice. Reading it does not create a lawyer-client relationship. Ontario laws, tax rates, and government programs change, and how the law applies depends on your specific facts. For advice about your situation, speak with a licensed Ontario lawyer. Treadstone Law is licensed by the Law Society of Ontario — reach us at 1-844-900-1070 or start a file online.

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