Support Calculator
Ontario Child Support Calculator
Child support in Ontario usually starts with the Federal Child Support Tables. The monthly amount depends on the payor’s income, the number of children, and the province.
Quick answer
Estimate Ontario child support using income, number of children, parenting arrangement, and the Federal Child Support Tables.
What the calculation uses
The calculation uses annual income, the number of children, province, and the parenting arrangement. For many employees, income starts with line 15000 from the most recent tax return.
Shared parenting and split parenting
If each parent has at least 40 percent of parenting time, support may use a set-off approach. If children live primarily with different parents, the calculation may compare each parent’s table amount.
Section 7 expenses
Child support is separate from special or extraordinary expenses such as daycare, medical costs, post-secondary expenses, and some extracurricular activities. These are often shared in proportion to income.
Why date-aware tables matter
Federal table amounts have changed over time. A calculator should use the table version that matches the relevant date so the result is not based on outdated numbers.
Common questions
What income is used for child support in Ontario?
For many people, support starts with annual income from line 15000 of the tax return. Adjustments may be needed for self-employment, benefits, deductions, or unusual income.
Do section 7 expenses replace monthly child support?
No. Section 7 expenses are usually paid in addition to monthly table support.
Does parenting time affect child support?
Yes. Primary residence, shared parenting, and split parenting can affect how support is calculated.
Build your Ontario separation agreement online
Estimate support, organize parenting and property terms, and export a formatted agreement for review.