Ohio Revised Code Title XXXI. Domestic Relations Children § 3123.21

(A) A withholding or deduction notice described in section 3121.03 of the Revised Code or an order to collect current support due under a support order and any arrearage owed by the obligor under a support order pertaining to the same child or spouse shall be rebuttably presumed to provide that the arrearage amount collected with each payment of current support equal at least twenty per cent of the current support payment.

(B) A court or administrative hearing officer may consider evidence of household expenditures, income variables, extraordinary health care issues, and other reasons for a deviation from the twenty per cent presumption.