What would be a reasonable fee to pay a consultant (CPA) whose work resulted in saving an organization (501c7) approximately 1 million dollars in tax liability based on his negotiating with the IRS? Should it be a commission based on the amount saved or a set fee? Also what if that consultant is also the president of the organization? What are the industry norms in this kind of situation? Thanks for taking the time to answer. I'm new to this forum.