Recent decisions by the Workers’ Compensation Appeals Board (WCAB) concluded that the current system used to measure permanent disability (PD) in workers' compensation claims can be challenged. This analysis discusses how the WCAB’s decisions could lead to (1) changes in PD ratings, (2) increased incentive for litigation, and (3) decreased uniformity in determining PD. Ultimately, the likely result would be increased benefits for workers and higher costs for businesses and governments.