In some states, depending on the type of case, the maximum percentage the lawyers may charge is fixed by statute. In others, it is what you and the lawyer work out between you. Similarly, in some states the lawyer may advance the expenses of obtaining medical records, accident reports, taking testimony, retaining experts out of his or her pocket and you may not have to repay the advances unless you win. However in other states, laws require the client to front the out of pocket costs, or obligate the client to repay the lawyer for them, regardless of the outcome of the case. It's always best to discuss the payment of fees and costs before hiring any professional and to make sure that whatever agreement you come to with your attorney is formalized in a written fee agreement that is signed by both you and your attorney.