Income, refers to consumption opportunity gained by an entity within a specified time frame, which is generally expressed in monetary terms.

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 Corporations, income is revenue minus costs, operating expenses, and taxes over period of time. The Corporation's Income is important to investors thus giving them an indication of the company's expected future dividends and its potential for growth and capital appreciation.

In the field of public economics, it may refer to the accumulation of both monetary and non-monetary consumption ability, the former being used as a proxy for total income.

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