The figures above use SSAG's "without child support" formula (a straight percentage of the gross income gap). Where child support is also being paid, SSAG's "with child support" formula applies instead — based on each spouse's net disposable income after tax and child-related credits, not gross income. That calculation needs net income and tax data this simplified tool doesn't collect, and can produce a meaningfully different number. Consult a family lawyer or specialized software (e.g. DivorceMate) for an accurate figure.