What is a Variation in Ontario Family Law?
A variation refers to the legal process of changing or ending a final court order or a support agreement in family law matters. This could involve child support, spousal support, decision making (formerly known as “custody”), parenting time (formerly known as “access”), or restraining orders.
Many people search for how to change child support in Ontario or how to modify a parenting order, and these matters fall directly under the variation process.
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Courts in Ontario recognize that family dynamics and financial situations can shift over time, however, changes are granted if there is evidence of a “material change in circumstances”. This refers to a substantial, unexpected change that would likely have resulted in different terms had it been known when the original order or agreement was made.
The process is governed by statutes like the Family Law Act (“FLA”), the Divorce Act (for married couples), and the Children’s Law Reform Act (“CLRA”).
Grounds for Seeking a Variation
To succeed in varying an order or agreement, you must demonstrate a material change in circumstances. This threshold, established by landmark Supreme Court of Canada decisions, ensures that final orders provide stability unless truly warranted.
Examples of material changes include:
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- A substantial increase or decrease in the payor’s income, affecting child support or spousal support payments.
- A child reaching adulthood, completing education, or moving out independently.
- Changes in living arrangements, such as a child residing with the other parent.
- The recipient of spousal support achieving financial independence or entering a new relationship.
- Health issues or other unforeseen events impacting custody or access.
Under section 37 of the FLA or section 17 of the Divorce Act, the court will only vary an order if the change is substantial, ongoing, and not temporary. For agreements incorporated into court orders, additional scrutiny applies to preserve the parties’ original intentions.
The Process for Varying an Agreement or Order in Ontario

Starting a variation typically involves filing a “motion to change” in the court that issued the original order or, if applicable, under interjurisdictional rules. Here’s a simplified overview of the steps:
- Check for Assignees: If support payments are assigned to a social service agency (e.g., due to social assistance), notify them early.
- Gather Evidence: Collect proof of material change, such as financial statements, pay stubs, or medical records.
- File Forms: Use forms like Form 15 (Motion to Change), Form 15A (Change Information Form), and supporting affidavits. If both parties agree, a consent motion can streamline the process.
- Serve Documents: Deliver copies to the other party and file proof of service with the court.
- Attend Court: If uncontested, the court may issue an order without a hearing. If disputed, attend a case conference or hearing where a judge decides based on the best interests of any children involved.
For child-related variations, the court prioritizes the child’s best interests under section 24 of the CLRA. Retroactive changes are possible but limited, as per guidelines from cases like D.B.S. v. S.R.G. (2006 SCC 37).
If you and the other party agree on changes, negotiate a new agreement first (this can avoid court altogether). However, it is strongly recommended to seek legal representation to ensure enforceability of the agreement. Further, it is always recommended that parties obtain independent legal advice from an Ontario family lawyer before finalizing any agreement.
How Stephen Durbin and Associates Can Help
Navigating variation can be complex and emotional. There are myriad factors to be considered when seeking change to a Court order or agreement, and having proper legal advice and guidance ensures that parties’ rights are protected, and they understand their obligations pursuant to the agreement or order. Our team at Stephen Durbin and Associates is here to provide you with compassionate and strategic advice to protect your rights and achieve the best outcome. Whether you’re looking to modify child support, change spousal support, or update parenting arrangements in Ontario, we are equipped to guide you through the process with clarity and confidence.
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