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Child Support: The Basics

Published: November 13, 2010

Last Updated: July 3, 2026

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Child Support: The Basics

In Ontario the Child Support Guidelines are used to calculate and determine the monthly child support amounts paid by one parent to the other for the benefit of the child(ren). Parents are legally obligated to support all of their dependent children. This is required as long as the child is a minor (under 18) or if over the age of 18 and is living at home and enrolled in full time education. Children over the age of 18 with disabilities may remain dependents, and thus be entitled to child support. A person may also be obligated to pay support even if the person is not the biological parent, but has stood in the place of the biological parent, as a step-parent.

The Gelman & Associates website has a helpful Child Support Calculator which can provide you with an approximate calculation of a child support obligation based on your current financial situation.

Child Support Guidelines

Once the child(ren)’s primary residency is established, the Child Support Guidelines are referred to in order to determine the monthly support amount to be paid by the parent who does not have the child(ren) primarily residing with them. The Child Support Guidelines is essentially a Table/Chart whereby Support is calculated based on the gross income of the parent paying support and the number of children support is to be paid for. It is important to note that gross income includes among other things, stock options, bonuses, overtime, investment income, rental income, etc.

Special & Extraordinary Expenses

In addition to the Child Support Guidelines there is another type of child support that is commonly referred to as “s. 7 special and extraordinary expenses”. These expenses are over and above the minimum table amounts required according to the Child Support Guidelines and are paid by the parents. Should the child(ren) have additional expenses that are extraordinary or special, both parents will be obligated to contribute to such expenses in proportion to their respective incomes. A few examples of s. 7 special and extraordinary expenses are: daycare costs, tutoring fees, extracurricular activities, dental/medical expenses and post-secondary educational costs.

Shared Parenting

It is becoming more common for both parents to equally parent the child(ren). In recent years we have seen a significant increase in a “shared parenting” approach whereby the child(ren) reside equally with both parents (shared custody). The child or children basically have two homes and spend equal time with their parents.

Lastly, unlike spousal support, child support is not tax deductible by the payor and not deemed taxable income by the recipient.

Related: Child Support: The Details

Written by Lisa Gelman

Senior Lawyer

Senior Lawyer Lisa Gelman has over 25 years of family law experience and founded Gelman & Associates to provide strategic legal counsel in family law matters concerning divorce, parenting, separation, and more.

Frequently Asked Questions - child support

In cases involving child support, you must typically serve and file financial disclosure. Financial disclosure is providing facts about your finances to the opposing party and the court, including your income, spending, assets such as property and other valuables, as well as debts.

Yes, it may be possible for you to pay for child support directly to your child, but it’s worth noting that this only happens in rare cases. Usually, you’re obligated to pay it to the other parent.

The province asserts the rights of the child through child support. As such, neither parent has the legal ability to bargain away or waive child support.

Parenting arrangements affect child support. Under Section 9 of the Federal Child Support Guidelines:

Where a spouse exercises a right of access to, or has physical custody of, a child for not less than 40 percent of the time over the course of a year, the amount of the child support order must be determined by taking into account:

  1. the amounts set out in the applicable tables for each of the spouses;
  2. the increased costs of shared custody arrangements; and
  3. the conditions, means, needs and other circumstances of each spouse and of any child for whom support is sought.

The Ontario courts have broad discretion to determine the merits and context of a child’s post-secondary education and when child support payments should cease.

No. Child support is memorialized in the divorce settlement agreement. It is not affected by the marital status of the parents.

Child support depends on the annual gross income of the parents.

Child support is calculated by considering the following:

  • The number of children that require support
  • The paying parent’s residential province
  • The paying parent’s annual income before tax

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