What ROCE measures
ROCE shows how many pounds of operating profit are generated per pound of capital employed. A ROCE of 12.5% means the business earns 12.5p of EBIT for every £1 of long-term capital deployed.
Unlike ROE, ROCE is capital-structure neutral because it uses EBIT (before interest) and total capital employed (equity + long-term debt). This makes it ideal for comparing companies with different leverage levels.