Ontario Child Support Table Calculator (2025)

Quick Answer

How much child support is paid in Ontario? The basic amount is the table amount in the Ontario table of the Federal Child Support Guidelines. It depends on only two things: the paying parent’s gross annual income and the number of children. For example, a parent earning $75,000 pays about $1,144 a month for two children under the tables in force from October 1, 2025. Above $150,000, the amount is the $150,000 figure plus a set percentage of the income over $150,000. Special or extraordinary (section 7) expenses are added on top, and shared or split parenting can change the result.

Ontario Child Support Table Calculator (2025 Federal Tables)

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Enter your figures and select Calculate.

How the calculator works

Income up to $150,000: find the $1,000 income bracket in the Ontario table. Table amount = basic amount for the bracket + the bracket percentage × (income − the bottom of the bracket).
Income over $150,000: table amount = the $150,000 amount + a percentage of the income over $150,000: 1 child $1,327 + 0.76%; 2 children $2,135 + 1.22%; 3 children $2,781 + 1.54%; 4 children $3,310 + 1.86%; 5 children $3,751 + 2.14%; 6 or more children $4,123 + 2.26%.
Income under $16,000: the table amount is $0.

The calculator uses the official bracket formula in Schedule I of the Guidelines, so it works for any exact income, not only round numbers.
The simplified tables published by Justice Canada round incomes to the nearest $100. We checked this calculator against every line of the 2025 simplified Ontario tables for 1 to 6 or more children. The results agree to within $1.
If you enter the other parent’s income, the calculator also shows that parent’s table amount and the difference between the two. That difference is only the starting point in shared parenting under section 9.
Amounts are monthly. The annual figure is simply the monthly amount × 12.

Worked example

A paying parent living in Ontario earns $82,350 a year and there are two children.

The income falls in the $82,000 to $82,999 bracket of the Ontario table for two children: basic amount $1,251 plus 1.52% of the income over $82,000.
$82,350 − $82,000 = $350; 1.52% × $350 = $5.32.
Table amount = $1,251 + $5.32 = $1,256.32 a month (about $15,076 a year).

At $200,000 with two children: $2,135 + 1.22% × ($200,000 − $150,000) = $2,135 + $610 = $2,745 a month.

Which tables apply

The Federal Child Support Tables were updated to reflect newer tax rules, and the 2025 tables came into force on October 1, 2025. Use them for child support payable from that date. For a period between November 22, 2017 and September 30, 2025, the 2017 tables apply, so this calculator is not suitable for past periods before October 2025.

The updated tables do not change an existing order automatically. A difference between your current amount and the 2025 table amount can, however, be a change in circumstances that supports a variation or recalculation.

Ontario’s Child Support Guidelines (O. Reg. 391/97), used for cases under the Family Law Act, rely on the same Ontario table as the federal Guidelines used in divorce cases.

Limitations

Shared parenting (section 9). If each parent has at least 40% of parenting time over a year, the table amount is not applied automatically. The court considers both parents’ table amounts, the increased costs of shared parenting and each household’s circumstances. Our parenting time 40% calculator checks the threshold.
Split parenting (section 8). Where each parent has one or more children in their majority care, each parent’s table amount is based on the number of children living with the other parent, and the amounts are set off.
Undue hardship (section 10). A court can order a different amount if paying the table amount would cause undue hardship and the paying household’s standard of living is higher than the other household’s (Schedule II test).
Special or extraordinary expenses (section 7). Child care, health, extraordinary education and activity costs and post-secondary expenses are shared in proportion to income on top of the table amount. Use our section 7 expenses calculator.
Income. The calculator uses the income you enter. Income is usually line 15000 Total income, adjusted under Schedule III, and can be imputed or averaged (sections 16 to 20). Those issues are often disputed.
Income over $150,000, children 18 or over, and a step-parent paying. A court can depart from the table amount in these cases (sections 3(2), 4 and 5).
This calculator gives general information, not legal advice. Only the official Federal Child Support Tables are a legal document.

Frequently Asked Questions

How is child support calculated in Ontario?

The basic amount is the table amount in the Ontario table of the Federal Child Support Guidelines, based on the paying parent’s gross annual income and the number of children. Special or extraordinary expenses under section 7 are added and shared in proportion to income. Shared or split parenting, undue hardship and some other situations can change the result.

What income is used for the child support table?

The Guidelines start with Total income on line 15000 of the paying parent’s tax return and apply the adjustments in Schedule III, for example for union dues or some spousal support. A court can also impute income, for example where a parent is intentionally under-employed or has not disclosed income properly.

How is child support calculated for income over $150,000?

The table amount is the amount for $150,000 plus a percentage of the income above $150,000. In the 2025 Ontario table that is $1,327 plus 0.76% for one child and $2,135 plus 1.22% for two children. A court can order a different amount for the income above $150,000 if the table amount is found to be inappropriate.

When did the 2025 child support tables take effect?

The updated Federal Child Support Tables came into force on October 1, 2025. They apply to child support from that date. Existing orders are not changed automatically, but the new amounts can support an application to vary or recalculate support.

Does the table amount change with shared parenting?

It can. If each parent has at least 40% of parenting time over a year, section 9 applies: the court considers both parents’ table amounts, the increased costs of shared parenting and the circumstances of each household. The difference between the two table amounts is the usual starting point, not an automatic result.

Sources

Related calculators

Legal review: Pending lawyer review. Based on the Federal Child Support Guidelines tables (Ontario), 2025 tables in force October 1, 2025. Calculator version: 2026-09-30. Prepared by Tailor Law Professional Corporation from the official sources listed above.

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This calculator provides general information about Ontario family law and an estimate based only on the figures you enter. It is not legal advice and does not create a lawyer-client relationship. Results can differ from what a court orders or what parties agree. Speak with a lawyer before relying on any figure.

Ontario Child Support Table Calculator