A personal injury lawyer works with clients who have suffered a physical or emotional injury, usually by accident or mistake. They cover cases such as car accidents, botched surgery, and harassment. Personal injury attorneys know how the insurance claim process works, they know what evidence to gather, and they know how to calculate and present a claim for damages. Many personal injury attorneys take cases on a contingency basis, which means they receive an agreed-upon percentage of the payment you receive, also called the personal injury settlement. If you don't recover any money, they don't get paid their fee. Personal injury lawyers also know how to defend you if someone thinks an injury is your fault.