Income is the consumption and savings opportunity gained by an entity within a specified timeframe, that is generally expressed in monetary terms. However, for households and individuals, "income is the sum of all the wages, salaries, profits, interests payments, rents and other forms of earnings received... in a given period of time."

For firms, income generally refers to "net-profit"—what remains of revenue total after expenses have been subtracted. In the field of public economics, the term may refer to the accumulation of both monetary and non-monetary consumption ability, with the former (monetary) being used as a proxy for total income.

Read more about Income:  Increase in Income, Economic Definitions, Income Inequality, Income in Philosophy and Ethics, Accountancy