Legal costs incurred in establishing the right to spousal support amounts, such as the costs of obtaining a divorce, a support order for spousal support under the Divorce Act or a separation agreement, are not deductible as these costs are on account of capital or are personal or living expenses. However, since children have a pre-existing right, arising from legislation, to support or maintenance, legal costs to obtain an order for child support are deductible.

 Legal costs of seeking to obtain an increase in spousal or child support, or to make child support non taxable under the Federal Child Support Guidelines, are non-deductible.