Minn. Stat. § 518A.32
Subd. 1. General.
This section applies to child support orders, including orders for past support or reimbursement of public assistance, issued under this chapter, chapter 256, 257, 518B, or 518C. If a parent is voluntarily unemployed, underemployed, or employed on a less than full-time basis, or there is no direct evidence of any income, child support must be calculated based on a determination of potential income. For purposes of this determination, it is rebuttably presumed that a parent can be gainfully employed on a full-time basis. As used in this section, "full time" means 40 hours of work in a week except in those industries, trades, or professions in which most employers, due to custom, practice, or agreement, use a normal work week of more or less than 40 hours in a week.
Subd. 2. Methods.
Determination of potential income must be made according to one of three methods, as appropriate:
Subd. 3. Parent not considered voluntarily unemployed, underemployed, or employed on a less than full-time basis.
A parent is not considered voluntarily unemployed, underemployed, or employed on a less than full-time basis upon a showing by the parent that:
Subd. 4. TANF or MFIP recipient.
If the parent of a joint child is a recipient of a temporary assistance to a needy family (TANF) cash grant or comparable state-funded Minnesota family investment program (MFIP) benefits, no potential income is to be imputed to that parent.
Subd. 5. Caretaker.
If a parent stays at home to care for a child who is subject to the child support order, the court may consider the following factors when determining whether the parent is voluntarily unemployed, underemployed, or employed on a less than full-time basis:
(5) the availability of child care providers.
This subdivision does not apply if the parent stays at home only to care for other nonjoint children.
Subd. 6. Economic conditions.
A self-employed parent is not considered to be voluntarily unemployed, underemployed, or employed on a less than full-time basis if that parent can show that the parent's net self-employment income is lower because of economic conditions that are directly related to the source or sources of that parent's income.