Carolyn Rae Welter (plaintiff) and Larry Welter (defendant) were married in 1998, had one child, and divorced the following year. According to Wisconsin law, child-support obligations are calculated based upon a percentage of gross income and assets. Gross income includes all salary and wages. When determining Larry's child-support obligation, the court commissioner found that Larry's overtime pay should be excluded from his gross income. Carolyn appealed to the circuit court. The circuit court affirmed the court commissioner's decision and found that it was correct in excluding overtime compensation. Carolyn appealed the decision.