WISCONSIN Part 54

There are other exceptions to the standard guidelines. The serial family calculator is for parents supporting more than one family. The shared-placement calculator is for parents whose custody arrangement allows for at least 25% of the time with the non-custodial parent. The split-placement calculator is for situations where there is more than one child, but the kids are split up between the parents. For example, mom has custody of the older child and dad has custody of the younger child. Also, there is a combination calculator, where the parenting plan combines both shared placement and split placement. See the Sources section below for a link to these calculators.

Regardless of the guideline used, the amount of child support must be reasonable. In most cases, it must also be a fixed number unless the parents agree to a percentage of the paying parent’s income. In that case, the amount of support would increase or decrease automatically as the paying parent brought in more or less money.