Gross Margin of PHIC for past 10 years: annual, quarterly and twelve month trailing (TTM) including Gross Margin growth rates and interactive chart. Gross profit margin shows the percentage of revenue that exceeds a company's costs of goods sold. It illustrates how well a company is generating revenue from the costs involved in producing their products and services. The higher the margin, the more effective the company's management is in generating revenue for each dollar of cost. Gross profit margin is calculated by subtracting the cost of goods sold from total revenue for the period and dividing that number by revenue. If a company has $200 million in revenue and $80 million in cost of goods sold, the gross margin is 60%.