Quebec Child Support Laws: Guidelines and Calculations

The Quebec Model Explained
Unlike other provinces that look primarily at the payor's income, Quebec considers the income of both parents. The philosophy is that children should benefit from the combined financial resources of their parents, just as they would if the family were intact.
The key document is the Child Support Determination Form (Schedule I). This mandatory form calculates the contribution required from each parent.
The Quebec model emphasizes the joint financial responsibility of both parents.
How Support is Calculated
The calculation involves several distinct steps:
- Determine Gross Income: Calculate the gross annual income of both parents.
- Calculate Disposable Income: Deduct a "basic personal amount" (exemptions for basic needs) from each parent's gross income.
- Combined Disposable Income: Add the two amounts together.
- Basic Parental Contribution: Use the government table to find the cost of raising the child(ren) based on this combined income.
- Prorate: Divide this cost between the parents in proportion to their disposable incomes.
- Custody Adjustment: Adjust the amount based on custody time (sole, shared, or visiting rights).
Because both incomes are variables, a significant change in either parent's financial situation can change the support payments.
Completing the Child Support Determination Form is a mandatory step in Quebec.

Special Expenses
Similar to "Section 7" expenses elsewhere, Quebec allows for net special expenses to be added to the basic contribution. These are shared in proportion to income (after deducting the basic exemption) and include:
- Childcare fees (net of tax credits).
- Post-secondary education costs.
- Special remedial education.
- Medical expenses not covered by RAMQ or insurance.

When Federal Laws Apply
The Quebec model applies in the vast majority of cases. However, the Federal Child Support Guidelines may apply if:
- You are obtaining a divorce AND
- One parent lives outside of Quebec.
Even in these cases, courts often apply the Quebec tables if both parents agree or if the child resides primarily in Quebec.
Modification and Indexation
Indexation: By law, child support judgments in Quebec are indexed annually on January 1st to reflect the cost of living. This happens automatically unless the court orders otherwise.
Modification: Parents can use the SARPA (Service administratif de rajustement des pensions alimentaires pour enfants) to recalculate support administratively without going to court. This is a cheaper and faster option for simple income changes.
More Quebec Laws
Sources and References
- Quebec State Legislature(state legislature).gov