Operating surplus is the income from control and ownership of capital. According to CSO, “Gross output at producer’s value less the sum of intermediate consumption, compensation of employees (including labour income of the self-employed), consumption of fixed capital and indirect taxes.” Symbolically,
OS = Gross value of output - Intermediate consumption – Consumption of fixed capital – Indirect taxes – Compensation of employees.
Or
OS = Income from property (rent + interest) + Income from entrepreneurship (profit)