The authors of this paper provide statistical evidence and argument for funds allocated to forensic services in New Zealand to take into account ethnic disparities in the use of the justice system. Forensic services take their clientele from the justice system. The authors state that the standard population-based funding formula, using a 2x multiplier for Māori, has no relationship to the reality. A new formula is proposed that takes into account the 7- to 8-fold differential rate of usage of the justice services by Māori.