Setting Child Support Payment Amounts Notice: The administrative code Chapter DCF 150 Child Support Percentage of Income Standard was amended effective July 1, 2018. BCS is in the process of updating information on this site to conform to those changes. The Percentage of Income Standard provides guidelines to Wisconsin courts for setting payment amounts for child support and medical support. These guidelines are based on the belief that both parents are responsible for supporting their children, whether they live together or not. The child support guidelines are based on: the parent's income the time a child spends with each parent whether a parent is supporting other children Percentage of Income Guidelines Each of the percentages below are applied to the parent's income for child support: 17% of income for 1 child 25% of income for 2 children 29% of income for 3 children 31% of income for 4 children 34% of income for 5 or more children Example: Monthly Income 1 child (17%) 2 children (25%) 3 children (29%) 4 children (31%) 5 children (34%) $1,500 $255 $375 $435 $465 $510 $2,000 $340 $500 $580 $620 $680 $2,500 $425 $625 $725 $775 $850 $3,000 $510 $750 $870 $930 $1,020 $3,500 $595 $875 $1,015 $1,085 $1,190 $4,000 $680 $1,000 $1,160 $1,240 $1,360 More examples using the basic guidelines Guidelines for Special Circumstances The court may use different guidelines for the special case types listed below: Shared Placement Cases Serial Family Cases Split-Placement Cases High-Income Payer Cases Low-Income Payer Cases
