Minnesota child support is not determined by a chart, as is common in many states. Rather, there are simple guidelines modified based on the circumstances of both parents. Based on a scale that factors net monthly income and number of children, a parent that makes $650-700 a month can expect to pay 18% of that salary to one non-custodial child. That number rises to 20% if the parent makes between $750 and 800 a month. The percentage can be as high as 38% for a non-custodial parent making an excess of $1,000 a month with four or more non-custodial children. There will be additional penalties on the parent for a history of refusing to pay child support. Child support arrangements are automatically reviewed every three years.