Once your case is settled, we calculate our attorney fees as a percentage of your settlement amount. A San Diego personal injury lawyer at The Barnes Firm will work hard to get you the best result possible after an accident.Worried about paying for a lawyer after a major accident? Let our San Diego law firm reveal how contingency fees can help you. The standard contingency fee for personal injury attorneys is typically around 33 to 40 percent. Call to see how our San Diego personal injury attorneys can help you. Our large team of 29 accomplished personal injury lawyers in San Diego all have over eight years of experience and a proven track record of success. California personal injury lawyers typically get 33 to 40 percent as their contingency fee. The actual figure depends on how complex your case is. San Diego Personal Injury Attorney - Free Consultations.