This depends on a number of factors, including the children’s best interests, the current parenting arrangements between the parents, the wishes of the children, the nature of the relationship that each parent has with the children, the reasons for the move, the distance of the move, and the financial ability of the remaining parent to see the children.

The On December 31, 2011, the federal government introduced new tables for the amount of child support to be paid each month.

The first tables were introduced on May 1, 1997. These tables were subsequently amended on May 1, 2006. This is the third set of tables in 14 years.

This change will impact hundreds of thousands of families throughout Canada where one parent pays to the other parent child support under these tables. In some cases, the child support payor will experience a reduction in child support. In other cases, the child support recipient will be able to collect a greater sum in child support.
For example, under the old tables, a non-custodial parent earning $21,300 would have paid $182 per month for one child. Under the new tables, the amount is $170 per month, a reduction of $148 per year. Conversely, under the old tables, a non-custodial parent earning $75,000 would have paid $1,098 per month for two children. Under the new tables, the amount is $1,105 per month, an increase of $84 per year.

The new tables can be found at http://www.justice.gc.ca/eng/pi/fcy-fea/lib-bib/tool-util/apps/look-rech/index.asp
It is important to note that the 2006 tables must still be used to determine child support owed before December 31, 2011. However, the updated tables should now be used to calculate child support payable from December 31, 2011 onward.

In the 2003 decision of Walsh v. Walsh, the wife asked the judge to order her ex-husband to pay a shortfall of child support in the sum of $43,000 for the past few years because his income rose.

In 1997, the court ordered her ex-husband to pay child support pursuant to the Child Support Guidelines based on an income of $175,000. In 2002, the wife discovered that her ex-husband’s income ranged between $214,000 and $376,000 per year for the past few years resulting in a shortfall of approximately $43,000, which her ex-husband should have paid in child support.

The court held that her ex-husband knew that his child support obligation was based on his income, but chose not to disclose his income voluntarily. In the court’s view, he could not now hide behind the defence that the children should not have the benefit of his increased income for this period because his wife did not request his income tax returns until 2002. The ex-husband was ordered to pay the entire shortfall in child support within 45 days.