230 ILCS 5/26.1
For all pari-mutuel wagering conducted pursuant to this Act, breakage shall be at all times computed on the basis of not to exceed 10 on the dollar. If there is a minus pool, the breakage shall be computed on the basis of not to exceed 5 on the dollar. Breakage shall be calculated only after the amounts retained by licensees pursuant to Sections 26 and 26.2 of this Act, and all applicable surcharges, are taken out of winning wagers and winnings from wagers. Beginning January 1, 2000, all breakage shall be retained by licensees, with 50% of breakage to be used by licensees for racetrack improvements at the racetrack from which the wagering facility derives its license. The remaining 50% is to be allocated 50% to the purse account for the licensee from which the wagering facility derives its license and 50% to the licensee.
230 ILCS 5/26.1