What is the difference between ROI and ROS?
Return on sales (ROS) is a measure of how much of each pound of sales turns into profits. It includes things like the cost of goods sold (COGS) and operating expenses (like marketing and R&D), and excludes things like taxes and interest, to highlight overall operational efficiency rather than financing costs.
Return on investment (ROI) is recorded as the returns attributed to the investment divided by the cost of the investment:
(ROI = net return / investment cost)
An investment could be anything that is expected to generate a return in the future, like new equipment, property, or product research. The key thing is interpreting how much revenue can be attributed to that investment.