How to change a parenting order in Ontario

An Ontario parenting order — covering parenting time and decision-making — can be changed only if there has been a material change in circumstances affecting the child, and the change is in the child's best interests. This is a higher bar than changing child support. Courts are deliberately cautious about disrupting a parenting arrangement once a child has settled into it. Stability matters. The change has to be real, enduring, and tied to the child — not to what is easier for either parent.

The material-change test for parenting orders comes from the Supreme Court of Canada's decision in Gordon v Goertz. Section 17 of the Divorce Act (or section 29 of the Children's Law Reform Act for non-divorce parenting orders) governs the variation procedure.

When this does apply

Parenting orders change when the underlying circumstances have shifted meaningfully and the existing schedule no longer serves the child. Common qualifying events: a parent relocating (a move that materially affects the child's contact with the other parent); a significant change in either parent's work schedule that makes the existing schedule unworkable; a change in the child's needs (a school move, a health issue, age-related changes such as a teenager wanting more autonomy); a serious safety concern such as substance abuse, family violence, or neglect. The court applies the best interests of the child test to the proposed change — not what is fair to the parents, what is best for the child.

When this doesn't apply

Wanting more time. Disagreement with how the other parent is exercising their time. A new partner. A general sense that the original order was too generous or too restrictive. None of these meet the material-change threshold on their own. The court will also be skeptical of a proposed change that is brought one or two years after the original order, where the underlying circumstances have not actually changed — judges read the timing as a parent trying to get a different outcome rather than responding to a real new fact. Courts are also reluctant to disrupt a stable arrangement the child has adapted to, even where one parent would prefer something different.

What to do

Step 1 — Confirm there is a real material change. Write it down in one or two sentences. If you cannot state the change clearly and concretely, the court will not see it either. Step 2 — Try agreement first. Most Ontario parents who have a real change in circumstances can negotiate a new schedule. Mediation (often free at the courthouse) is the right venue if direct conversation is hard. A written amendment signed by both parents, with Independent Legal Advice, avoids court entirely. Step 3 — If agreement fails, file a Motion to Change. Use Form 15. Set out the original order, the material change, the proposed new schedule, and why it is in the child's best interests. File supporting evidence — school records, work schedule changes, medical reports, whatever is concrete. The other parent has 30 days to respond. The court process from there is similar to any other contested family-law file: case conference, possible motion, possible settlement, possibly a hearing. Most variation files settle at the case conference once the judge signals which way the best-interests analysis is likely to come out.

See your specific Ontario plan at cairnguide.ca/signup.