The Gross Processing Margin is the difference between the cost of a raw commodity and the income it generates once sold as a finished product. The gross processing margin is affected by supply and demand, which means that when supply is high, the gross processing margin is usually low. This product is used to analyze the gross processing margin of a raw material.A measure of profitability, gross processing margin has a direct impact on how well a business is able to operate. The higher the gross processing margin, the better the business is doing. Gross processing margin is a component of net profit and has a direct impact on net profit per share.