A contingency fee is different from pro bono, even though they often get confused. Pro bono is a case that an attorney takes for the public good and does not charge fees. The lawyer will take the case voluntarily and does not expect any payment for their legal services. Law students and paralegals can offer legal services under the premise of pro bono. Per the American Bar Association, lawyers should contribute 50 hours of pro bono work each year. Depending on the state you reside in, the suggested pro bono hours will vary.