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Attorney General Ontario Child Support Calculator

Reviewed by Calculator Editorial Team

This official Ontario child support calculator helps you determine the appropriate child support payments based on your income, expenses, and custody arrangements. The calculator follows the guidelines set by the Ontario Attorney General's office to ensure accurate and fair results.

How to Use This Calculator

To calculate your child support obligation, follow these steps:

  1. Enter your total annual income in the "Your Income" field.
  2. Enter your total annual expenses in the "Your Expenses" field.
  3. Select the number of children you are responsible for from the dropdown menu.
  4. Choose the custody arrangement (shared or sole) from the dropdown menu.
  5. Click the "Calculate" button to see your estimated child support payment.

The calculator will display your estimated monthly child support payment based on the information you've provided. Remember that this is an estimate and actual child support orders may vary based on specific circumstances.

Formula Used

The Ontario child support formula is based on the following steps:

  1. Calculate your net income by subtracting your expenses from your total income.
  2. Apply the Ontario child support percentage to your net income.
  3. Divide the result by 12 to get the monthly child support payment.
Monthly Child Support = [(Total Income - Expenses) × Child Support Percentage] ÷ 12

The child support percentage varies based on the number of children and custody arrangements. For shared custody, the percentage is typically higher than for sole custody.

Worked Example

Let's look at an example to see how the calculator works:

Suppose you have a total annual income of $60,000, annual expenses of $30,000, and you have two children in shared custody. The Ontario child support percentage for two children in shared custody is 17.5%.

  1. Calculate your net income: $60,000 - $30,000 = $30,000
  2. Apply the child support percentage: $30,000 × 17.5% = $5,250
  3. Divide by 12 to get the monthly payment: $5,250 ÷ 12 = $437.50

Based on this example, your estimated monthly child support payment would be $437.50.

Note: This is an estimate. Actual child support orders may vary based on specific circumstances and court decisions.

Frequently Asked Questions

Is this calculator officially recognized by the Ontario government?

While this calculator provides estimates based on official guidelines, it is not an official government tool. For official child support calculations, you should consult with the Ontario Attorney General's office or a qualified legal professional.

How often should child support payments be reviewed?

Child support orders are typically reviewed annually or whenever there are significant changes in income, expenses, or family circumstances. It's a good idea to review your child support arrangement with your legal counsel at least once a year.

What happens if one parent doesn't pay child support?

If a parent fails to pay child support, the non-paying parent may face legal consequences, including wage garnishment, bank account seizures, and even criminal charges in severe cases. It's important to report non-payment to the Ontario Attorney General's office.