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The guidelines define special expenses as expenses that are:
You and the other parent may agree on how to divide payment for special expenses and may agree that an amount should be added to the basic child support amount in the table. In your agreement you can even list special expenses that you expect to incur years later. For example, you may wish to arrange for paying uninsured dental expenses, day care and contributions towards university tuition.
You can consider special expenses when you set child support amounts in sole custody or split custody arrangements.
You and the other parent are free to decide if a special expense is reasonable and necessary and how much each of you will contribute to them. As a general rule, you will share in the special expense in proportion to your incomes, but you may agree to any other arrangement. Worksheet 2 at the back of this booklet can help you calculate special expenses.
If you cannot agree on which special expenses are reasonable and necessary or how to pay for them, either of you may ask a judge to decide, or ask a third party, such as a lawyer or a mediator to help you.
Michelle and Patrick agree that a day-care “net” expense of $450 a month is necessary. (The amount is “net” because they must consider the tax deduction Patrick will receive for child-care expenses, and the increase he will receive in the National Child Benefit.) They also agree that a sum must be added to the support amount of $926 that Michelle pays. Because parents normally divide the cost of the expense in proportion to their respective incomes, Michelle and Patrick calculate how much of the $450 in day-care expenses each parent will pay. They first calculate the total income of both parents by adding both their incomes ($50,000 plus $40,000 = $90,000). Then, to find out how much Michelle would pay, they would divide Michelle's income by the total income and multiply the result by the expense amount.
$50,000 divided by $90,000, multiplied by $450, equals Michelle's share of the expense:
$50,000 ÷ $90,000 × $450 = $250
Patrick's share will be the difference between Michelle's share and the total expense. Therefore, Michelle would pay $250 and Patrick would contribute $200 to cover the total expense of $450. Michelle's $250 for child care expenses would be added to the table amount of support of $926 for a total amount of child support of $1,176 per month.