Finding an agreed-upon methodology to calculate child support can become litigious when a supporting spouse’s income is variable. But basing support calculations on gross income and percentages of income is a good start. In his January 2019 Illinois Bar Journal article, “Taming the Guessing Game: Child Support and Variable Income,” Bryan D. Sullivan explores the benefits of using predetermined percentages of gross income for additional child-support orders under the income shares model and provides practical advice for legal practitioners when drafting such orders. Sullivan’s article also includes links to extensive tables that show how various child-support calculations discussed in his article play out.
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