In Arizona, comparative fault is a legal doctrine that apportions fault and damages in personal injury cases. It allows a court to assign a percentage of fault to each party involved in an accident or incident, and to award damages accordingly.

Under Arizona's comparative fault law, if you are injured in an accident and you are found to be partially at fault for the accident, the amount of damages you can recover will be reduced by the percentage of fault that is attributed to you. For example, if you are awarded $100,000 in damages, but the court finds that you are 25% at fault for the accident, your damages will be reduced by $25,000, and you will only be able to recover $75,000.

Comparative fault is used to determine liability and damages in cases where multiple parties are involved in an accident or incident and are each partially at fault. It is meant to apportion fault and damages fairly, taking into account the actions and responsibilities of each party.