Haw. Rev. Stat. § 601-17.5

The judiciary may contract with a collection agency bonded under chapter 443B or with a licensed attorney to collect any delinquent court-ordered penalties, fines, restitution, sanctions, and court costs, including juvenile monetary assessments. Any fees or costs associated with the collection efforts shall be added to the amount due and retained by the collection agency as its payment; provided that no fees or costs shall exceed fifty per cent of the amount collected.