This means the attorney would take as payment a third of the total recovery. Use our personal injury attorney fee calculator to see an estimate of your legal fees compared to your settlement amount.The actual percentages vary based on case type and other factors specific to your claim. Generally, the attorney fee percentage is calculated based on the total settlement or judgment award at trial. The contingency fee is a percentage of your overall award or settlement amount. Get more of YOUR settlement. Your attorney will build your case, keep track of your medical records, negotiate with insurance companies, and represent you in court if necessary. This means that you pay nothing up front and a percentage only if we win. How Much Does a Personal Injury Lawyer Cost? Arizona personal injury attorneys generally work on a contingency fee basis.