Michigan Compiled Laws, Chapter 552. Divorce § 552.605

Sec. 5. (1) If a court orders the payment of child support under this or another act of the state, this section applies to that order.

(2) Except as otherwise provided in this section, the court shall order child support in an amount determined by application of the child support formula developed by the state friend of the court bureau as required in section 19 of the friend of the court act, MCL 552.519. The court may enter an order that deviates from the formula if the court determines from the facts of the case that application of the child support formula would be unjust or inappropriate and sets forth in writing or on the record all of the following:

(3) Subsection (2) does not prohibit the court from entering a child support order that is agreed to by the parties and that deviates from the child support formula, if the requirements of subsection (2) are met.