Return of capital (ROC) refers to principal payments back to 'capital owners' (shareholders, partners, unitholders) that exceed the growth (net income/taxable income) of a business or investment. It should not be confused with Rate of Return (ROR), which measures a gain or loss on an investment. Basically, it is a return of some or all of the initial investment, which reduces the basis on that investment. Return of capital (ROC) refers to principal payments back to 'capital owners' (shareholders, partners, unitholders) that exceed the growth (net income/taxable income) of a business or investment. It should not be confused with Rate of Return (ROR), which measures a gain or loss on an investment. Basically, it is a return of some or all of the initial investment, which reduces the basis on that investment.