How is child support calculated in Ontario after a divorce?
In Ontario, child support is calculated under the Federal Child Support Guidelines based on the payor's pre-tax annual income, the number of children, and the province of residence. These three inputs map to a national table that produces the monthly amount. The calculation uses pre-tax (gross) income, not take-home pay. When the payor's income exceeds $150,000, the recipient may seek child support above the table amount under Section 4 of the Guidelines. For how child and spousal support fit together, see How are child support and spousal support calculated?; for a China–Ontario comparison, read Ontario vs China: child and spousal support; our child and spousal support overview collects related guides.
Key Points
Ontario follows the Federal Child Support Guidelines. The amount is determined by three inputs: the payor's pre-tax annual income, the number of children, and the province of residence. These map directly to a national table that gives the monthly amount.
Two practical points: first, this is pre-tax income (Line 15000 on a Canadian T1), not take-home pay. Second, when the payor earns over $150,000, the table is a floor — Section 4 of the Guidelines lets the recipient seek a higher amount, recognizing that children should share in the household's actual standard of living.
Detailed Answer
The Federal Child Support Guidelines apply to all Canadian provinces, including Ontario, in divorce cases. The Guidelines table converts the payor's income, number of children, and province into a monthly amount with very little discretion. Lawyers and judges focus most of their effort on verifying that the income disclosed is complete and accurate.
Pre-tax income includes employment earnings, self-employment income, rental income, dividends, foreign income, and capital gains. For self-employed payors, courts often look beyond the T1 line to assess actual disposable income, including discretionary corporate expenses and benefits. Underreporting can be challenged through full disclosure motions and forensic accounting.
When the payor earns over $150,000, simply extending the table can produce an amount that does not reflect the children's actual lifestyle. Section 4 of the Guidelines allows the court to award above-table support, considering the family's established consumption patterns, private school tuition, extracurricular activities, and similar high-end expenses.
The Guidelines also distinguish table amount (the basic monthly support) from Section 7 expenses (special or extraordinary costs such as medical, daycare, post-secondary tuition, and major extracurriculars), which parents share proportionally to their incomes — separately from the table amount. To discuss your specific case, contact Miao He at 647-930-6688.
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