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50/50 Custody Child Support Calculator Ontario: Calculate Fast & Accurate

By Gabriel Aug 06, 2026
50/50 Custody Examples:  2-2-3, 2-2-5-5, & 3-4-4-3 Schedules
50/50 Custody Examples: 2-2-3, 2-2-5-5, & 3-4-4-3 Schedules

Navigating child custody and support arrangements in Ontario can be complex, especially when calculating child support for a 50/50 custody scenario. This article aims to guide you through the process using the 2021 Ontario Child Support Guidelines and an understanding of the 50/50 custody child support calculator.

50/50 Custody Examples:  2-2-3, 2-2-5-5, & 3-4-4-3 Schedules
50/50 Custody Examples: 2-2-3, 2-2-5-5, & 3-4-4-3 Schedules

Firstly, it's crucial to grasp that the 50/50 custody scenario is considered shared custody in Ontario. This means both parents have the children for at least 40% of the time. Under these circumstances, child support is calculated differently than in sole or primary residential care cases.

High Conflict Coparenting Bundle Incident Log Child Support Payment Tracker Expense Tracker Google Sheet Custody Documentation Record
High Conflict Coparenting Bundle Incident Log Child Support Payment Tracker Expense Tracker Google Sheet Custody Documentation Record

Understanding the 50/50 Custody Child Support Calculation

The key principle in shared custody cases is to determine the difference in each parent's income and apply the relevant table amount for that difference. But with 50/50 custody, the calculations become more nuanced.

Custody and Parenting Schedules for Your Child's Age
Custody and Parenting Schedules for Your Child's Age

In a 50/50 custody arrangement, neither parent is considered the payor or the recipient. Instead, the focus shifts to the 'Other Parent's Income'. Here's how it works:

Step 1: Determine Each Parent's Income

Free Editable Custody Schedule Templates - MS Word {DOCX
Free Editable Custody Schedule Templates - MS Word {DOCX

Both parents must disclose their gross annual income. This includes employment income, employment-related benefits, rental income, pension adjustments, and any taxable bursaries or scholarships.

If a parent is unemployed or underemployed, the court might believe their income is higher. In such cases, an 'income attribution' may be applied, potentially increasing the child support obligation.

Step 2: Determine Which Parent Has the Higher Income

Child Custody Agreement, Co-Parenting, Joint Custody, Legal Custody, Physical Custody, Parenting Plan, Child Support, Communication Plan
Child Custody Agreement, Co-Parenting, Joint Custody, Legal Custody, Physical Custody, Parenting Plan, Child Support, Communication Plan

Once both incomes are established, you'll need to identify which parent has the higher income. This parent's income (the payor) will be used to determine the table amount, while the other parent's income (we'll call the recipient) will be factored in later.

Let's use an example: Parent A makes $100,000, and Parent B makes $80,000. Parent A, with the higher income, is the payor.

Step 3: Determine the 'Other Parent's Income'

How to Decide on a 60/40 Custody Schedule – Stepmomming.com: resources and coaching for stepmoms
How to Decide on a 60/40 Custody Schedule – Stepmomming.com: resources and coaching for stepmoms

In a 50/50 custody scenario, the 'Other Parent's Income' is calculated by subtracting the recipient's income from the payor's income and then doubling the result. In our example, it would be:

(Parent A's income - Parent B's income) x 2 = $40,000

The Custody X Change App is Used by Parents and Professionals
The Custody X Change App is Used by Parents and Professionals
an ad for the child's birth is shown in black and white, with text on
an ad for the child's birth is shown in black and white, with text on
Child’s Best Interest In Custody
Child’s Best Interest In Custody
three cell phones and one laptop with the words custoy x change overview on it
three cell phones and one laptop with the words custoy x change overview on it
Types of Custody: Full, Sole, Primary, Joint & More
Types of Custody: Full, Sole, Primary, Joint & More
an image of a list with the names and dates for different locations to go on it
an image of a list with the names and dates for different locations to go on it

Applying the Table Amount

Now, we use the 'Other Parent's Income' to find the applicable table amount using the Ontario Child Support Guidelines table. Let's continue with our example. With an 'Other Parent's Income' of $40,000, we find the applicable table amount.

Assuming our example falls into Table 1, the table amount for one child would be $2,867 per month. But remember, this table amount is not a set value; it adjusts based on the 'Other Parent's Income'.

The Base Table Amount and Percentage Reduction

In most cases, the recipient parent receives a 50% reduction on the table amount due to the shared custody arrangement. However, there are exceptions. If the payor's income exceeds $159,300 (the maximum threshold for the 2021 Ontario Child Support Guidelines), no percentage reduction applies.

Back to our example: After applying the 50% reduction, the monthly child support amount would be:

$2,867 x 50% = $1,433.50

Finalizing the Child Support Calculation

With a 50/50 custody arrangement, child support is typically woven into the costs of raising the children. Both parents are responsible for directly incurring and splitting children's expenses, such as daycare, extra-curricular activities, and unreimbursed healthcare costs.

In conclusion, calculating child support in a 50/50 custody scenario in Ontario involves careful consideration of each parent's income, application of the 'Other Parent's Income', and adjusting the table amount as required. If you find these calculations complex, consider enlisting the help of a family law professional or using child support calculators for a more accurate estimate. The important thing is to ensure your child receives adequate financial support in your shared custody arrangement.