As children grow, their financial needs and their parents’ circumstances can change. A parent may lose their job, receive a promotion, begin working part-time, or experience a significant change in income. These developments can raise questions about whether an existing child support arrangement should be changed.
Yes, child support payments can increase or decrease in Ontario when there has been a legally relevant change in circumstances. However, an existing court order does not automatically change simply because a parent’s income or financial situation has changed.
Under the Federal Child Support Guidelines and applicable Ontario family law, support obligations can be reviewed when circumstances warrant a different amount.
Our Toronto child support lawyers explain when child support can change, how voluntary reductions in income are treated, and what parents should know before requesting a variation.
Key Takeaways About Changing Child Support in Ontario
- Child support payments can increase or decrease. Changes in income, parenting arrangements, or a child’s financial needs may justify reviewing an existing order.
- A change in income does not automatically change support. Parents may need to obtain an amended agreement, court order, or eligible recalculation.
- Working part-time does not guarantee lower payments. Courts may consider a parent’s earning capacity and may impute income where appropriate.
- Financial disclosure is important. Reliable information about income and the reasons for a change can help establish whether a variation is justified.
- Child support and spousal support follow different rules. A change in employment may affect either obligation, but the legal analysis is not identical.
- Existing arrears do not automatically disappear. Parents who have fallen behind may need to address outstanding payments separately from ongoing support.
When Can Child Support Be Changed in Ontario?
Child support arrangements are generally intended to reflect the parents’ financial circumstances and the children’s needs.
If a support order was determined according to the applicable child support table, a change in circumstances that would result in a different amount under the guidelines may justify a variation.
Applicable changes can include situations where the paying parent’s annual income and ability to pay have increased or declined. For example, if you unexpectedly lose your job or receive a promotion that substantially increases your income, the amount of child support payable may need to be reviewed.
Other circumstances that may affect child support include changes in parenting arrangements, a child’s dependency status, special or extraordinary expenses, or the applicable child support tables.
The federal child support tables were updated effective October 1, 2025. Parents reviewing older orders should ensure that any proposed calculation uses the tables applicable to their circumstances.
However, not every change results in a different support obligation. The appropriate amount depends on the governing legislation, the existing order or agreement, and the relevant evidence.
A retroactive reduction may raise further questions when a parent has already paid more than the amount ultimately required. Our article examines when child support overpayments may be reimbursed in Ontario and how courts assess possible remedies.
Can You Work Part-Time to Lower Your Child Support or Spousal Support in Ontario?
Choosing to work part-time does not automatically entitle someone to pay less child support or spousal support in Ontario. Courts may look beyond actual earnings and consider what a person is reasonably capable of earning.
If a parent voluntarily reduces their working hours, changes to a lower-paying job, or stops working altogether, the court may examine the reasons for that decision.
Under section 19 of the Federal Child Support Guidelines, a court may impute income to someone who is intentionally underemployed or unemployed, subject to recognized exceptions.
This means a court may calculate child support using an income amount higher than the person’s actual reported earnings.
What Is Imputed Income in Ontario Family Law?
Imputed income is income that a court attributes to a person for support purposes rather than relying exclusively on what they currently earn.
For example, consider a parent who previously earned $90,000 annually in a full-time position but voluntarily switches to part-time work earning $40,000.
If the court determines that the parent is unreasonably underemployed, it may calculate support using an income that better reflects their earning capacity.
This is not automatic. Courts consider the available evidence, including employment history, qualifications, health, job opportunities, and the reasons for reduced employment.
Importantly, a parent does not necessarily need to be deliberately avoiding support payments for income to be imputed.
Are There Valid Reasons to Reduce Working Hours?
Yes. Not every decision to work part-time amounts to unreasonable underemployment. Section 19 recognizes exceptions relating to children’s needs and reasonable educational or health needs.
A court may also consider other relevant circumstances when determining whether reduced income should affect support.
For example, a parent reducing work hours because of a documented medical condition may be in a different position from someone voluntarily leaving suitable full-time employment without a reasonable explanation.
Does the Same Rule Apply to Spousal Support?
A person’s earning capacity may also be relevant when determining or varying spousal support.
However, spousal support is assessed under a different legal framework that considers factors such as the parties’ means, needs, circumstances, and the basis for entitlement.
The Spousal Support Advisory Guidelines provide guidance on support amounts and duration but are not legislation.
A reduction in employment income therefore does not automatically result in reduced spousal support either.
For more information, visit our Toronto spousal support lawyers page.
How Can Table-Based Child Support Be Changed?
Most child support calculations begin with the applicable child support tables. The amount ordinarily depends on the paying parent’s guideline income, the number of children, and the applicable province or territory.
Under section 14 of the Federal Child Support Guidelines, a change that would result in a different table amount may constitute a change of circumstances for variation purposes.
For example, if a paying parent’s income increases from $65,000 to $85,000, this may result in a higher guideline amount. Likewise, an involuntary and sufficiently substantiated reduction in income may justify a lower amount.
However, a parent should not independently substitute a new payment amount for the amount required by an existing order.
Some eligible Ontario child support arrangements may also be updated through an administrative recalculation service.
Can Child Support Change if It Was Not Based on the Tables?
Even where child support was determined using a basis other than the ordinary table amount, a variation may still be possible.
Depending on the circumstances, the court may consider changes in the condition, means, needs, or other circumstances of either parent or the child.
For example, the cost of a child’s medical treatment, educational needs, or special expenses may change significantly over time.
Similarly, changes in shared parenting arrangements can affect how child support is calculated.
When each parent exercises at least 40% of parenting time over the course of a year, section 9 of the Federal Child Support Guidelines requires consideration of both parents’ table amounts, the increased costs of shared parenting, and other relevant circumstances.
A variation request should be supported by evidence demonstrating why the existing arrangement no longer reflects the circumstances.
How Do You Apply to Change Child Support in Ontario?
The process depends on whether there is a court order or written agreement, whether the parties agree, and whether the arrangement qualifies for an available recalculation service.
Review the Existing Support Arrangement
Before requesting a change, review the existing court order or agreement to determine the current payment obligations and any provisions requiring income disclosure or periodic review.
Gather Financial Disclosure
Parents seeking a variation will often need to provide reliable financial information.
This may include income tax returns, notices of assessment, recent pay statements, employment records, financial statements, or documents explaining changes in employment.
When a parent claims they cannot work full-time, evidence explaining the reason for reduced employment may be especially important.
Consider an Agreement or Motion to Change
Where parents agree that child support should be adjusted, they may be able to formalize the change through the applicable legal procedure.
Where they disagree, a parent may need to bring a motion to change.
Ontario’s guide to motions to change explains the relevant court procedures, including applications involving existing orders and written agreements.
Our Toronto variations lawyers can assist with reviewing support arrangements and identifying the appropriate process.
Can Child Support Arrears Be Reduced or Cancelled?
A parent who has fallen significantly behind on child support payments may wonder whether the amount owed can be reduced. Child support arrears are unpaid amounts that have accumulated under an existing support obligation.
In certain circumstances, a court may authorize a retroactive variation that affects the amount owing. However, relief is not automatic simply because a parent has experienced financial hardship.
The Supreme Court of Canada’s decision in Colucci v. Colucci, 2021 SCC 24 provides important guidance about retroactive decreases in child support.
The court emphasized the importance of timely financial disclosure and explaining changes in circumstances. Where a parent seeks to reduce arrears without showing a past change in income that justifies a retroactive variation, the applicable test is particularly demanding.
A parent who cannot afford their current payments should seek advice about changing the support obligation rather than allowing additional arrears to accumulate.
For more information, read our guide on what to do if child support is not paid in Ontario.
Frequently Asked Questions About Changing Child Support in Ontario
Can Child Support Be Reduced if I Lose My Job?
Possibly. An involuntary job loss may justify changing child support if it affects the appropriate guideline amount. However, you generally need to follow the applicable legal process rather than stopping or reducing payments yourself.
Can I Work Part-Time Instead of Full-Time to Pay Less Child Support?
Working part-time does not automatically lower child support. If a court finds that you are intentionally underemployed without a legally sufficient justification, it may impute income based on your earning capacity.
Can My Ex Request More Child Support if My Income Increases?
Yes. An increase in the paying parent’s income may justify a higher guideline amount. The appropriate change depends on the applicable rules and the circumstances of the support arrangement.
Does Child Support Automatically Change When My Income Changes?
No. An existing support order generally remains in effect until it is properly changed. Some eligible arrangements may be updated through Ontario’s child support recalculation process.
Can I Change Child Support Without Going to Court?
In some circumstances, yes. Parents may be able to negotiate an appropriate amendment or use an available administrative recalculation process. The correct procedure depends on the existing arrangement and whether the parties agree.
Can the Court Reduce Child Support Arrears?
A court may reduce arrears in appropriate circumstances, but the legal test depends on the relief requested and the evidence. A reduction in present income does not automatically cancel previously unpaid support.
Contact Our Toronto Child Support Lawyers About Changing Your Support Payments
If your financial circumstances have changed, you may be able to have the amount of child support you pay or receive adjusted.
Whether you have experienced job loss, a promotion, reduced working hours, or changes in your children’s needs, it is important to understand your legal rights and responsibilities before changing an existing support arrangement.
At Gelman & Associates, our Toronto child support lawyers assist clients with reviewing existing support obligations, negotiating changes, and bringing motions to vary child support orders.
To discuss your circumstances, contact Gelman & Associates or call 1-844-736-0200 to book a consultation.
Disclaimer: This article provides general information about Ontario family law and is not legal advice. Child support and spousal support variations depend on individual circumstances and the applicable legal framework.
