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In economics, economic rent is any payment to an owner or factor of production in excess of the costs needed to bring that factor into production. In classical economics, economic rent is any payment made (including imputed value) or benefit received for non-produced inputs such as location (land) and for assets formed by creating official privilege over natural opportunities (e.g., patents). In the moral economy of neoclassical economics, economic rent includes income gained by labor or state beneficiaries of other "contrived" (assuming the market is natural, and does not come about by state and social contrivance) exclusivity, such as labor guilds and unofficial corruption.
In the moral economy of the economics tradition broadly, economic rent is opposed to producer surplus, or normal profit, both of which are theorized to involve productive human action. Economic rent is also independent of opportunity cost, unlike economic profit, where opportunity cost is an essential component. Economic rent is viewed as unearned revenue  while economic profit is a narrower term describing surplus income earned by choosing between risk-adjusted alternatives. Unlike economic profit, economic rent cannot be theoretically eliminated by competition because any actions the recipient of the income may take such as improving the object to be rented will then change the total income to contract rent. Still, the total income is made up of economic profit (earned) plus economic rent (unearned).
For a produced commodity, economic rent may be due to the legal ownership of a patent (a politically enforced right to the use of a process or ingredient). For education and occupational licensing, it is the knowledge, performance, and ethical standards, as well as the cost of permits and licenses that are collectively controlled as to their number, regardless of the competence and willingness of those who wish to compete on price alone in the area being licensed. In regard to labor, economic rent can be created by the existence of mass education, labor laws, state social reproduction supports, democracy, guilds, and labor unions (e.g., higher pay for some workers, where collective action creates a scarcity of such workers, as opposed to an ideal condition where labor competes with other factors of production on price alone). For most other production, including agriculture and extraction, economic rent is due to a scarcity (uneven distribution) of natural resources (e.g., land, oil, or minerals).
When economic rent is privatized, the recipient of economic rent is referred to as a rentier.
Economic rent is different from other unearned and passive income, including contract rent. This distinction has important implications for public revenue and tax policy. As long as there is sufficient accounting profit, governments can collect a portion of economic rent for the purpose of public finance. For example, economic rent can be collected by a government as royalties or extraction fees in the case of resources such as minerals and oil and gas.
Historically, theories of rent have typically applied to rent received by different factor owners within a single economy. Hossein Mahdavy was the first to introduce the concept of "external rent", whereby one economy received rent from other economies.
According to Robert Tollison (1982), economic rents are "excess returns" above the "normal levels" that are generated in competitive markets. More specifically, a rent is "a return in excess of the resource owner's opportunity cost".
Henry George, best known for his proposal for a single tax on land, defines rent as "the part of the produce that accrues to the owners of land (or other natural capabilities) by virtue of ownership" and as "the share of wealth given to landowners because they have an exclusive right to the use of those natural capabilities."
In simple terms, economic rent is an excess where there is no enterprise or costs of production.
In political economy, including physiocracy, classical economics, Georgism, and other schools of economic thought, land is recognized as an inelastic factor of production. Land, in this sense, means exclusive access rights to any natural opportunity. Rent is the share paid to freeholders for allowing production on the land they control.
As soon as the land of any country has all become private property, the landlords, like all other men, love to reap where they never sowed, and demand a rent even for its natural produce. The wood of the forest, the grass of the field, and all the natural fruits of the earth, which, when land was in common, cost the labourer only the trouble of gathering them, come, even to him, to have an additional price fixed upon them. He must then pay for the licence to gather them; and must give up to the landlord a portion of what his labour either collects or produces. This portion, or, what comes to the same thing, the price of this portion, constitutes the rent of land ....
Johann Heinrich von Thünen was influential in developing the spatial analysis of rents, which highlighted the importance of centrality and transport. Simply put, it was density of population, increasing the profitability of commerce and providing for the division and specialization of labor, that commanded higher municipal rents. These high rents determined that land in a central city would not be allocated to farming but be allocated instead to more profitable residential or commercial uses.
Observing that a tax on the unearned rent of land would not distort economic activities, Henry George proposed that publicly collected land rents (land value taxation) should be the primary (or only) source of public revenue, though he also advocated public ownership, taxation, and regulation of natural monopolies and monopolies of scale that cannot be eliminated by regulation.
Neoclassical economics extends the concept of rent to include factors other than natural resource rents.
The labeling of this version of rent as "Paretian" may be a misnomer in that Vilfredo Pareto, the economist for whom this kind of rent was named, may or may not have proffered any conceptual formulation of rent.
Monopoly rent refers to those economic rents derived from monopolies, which can result from (1) denial of access to an asset or (2) the unique qualities of an asset. Examples of monopoly rent include: rents associated from legally enforced knowledge monopolies derived from intellectual property like patents or copyrights; rents associated with 'de facto' monopolies of companies like Microsoft and Intel who control the underlying standards in an industry or product line (e.g. Microsoft Office); rents associated with 'natural monopolies' of public or private utilities (e.g. telephone, electricity, railways, etc.); and rents associated with network effects of platform technologies controlled by companies like Facebook, Google, or Amazon.
The generalization of the concept of rent to include opportunity cost has served to highlight the role of political barriers in creating and privatizing rents. For example, a person seeking to become a member of a medieval guild makes a huge investment in training and education, which has limited potential application outside of that guild. In a competitive market, the wages of a member of the guild would be set so that the expected net return on the investment in training would be just enough to justify making the investment. In a sense, the required investment is a natural barrier to entry, discouraging some would-be members from making the necessary investment in training to enter the competitive market for the services of the guild. This is a natural "free market" self-limiting control on the number of guild members and/or the cost of training necessitated by certification. Some of those who would have opted for a particular guild may decide to join a different guild or occupation.
However, a political restriction on the number of people entering into the competitive market for services of the guild has the effect of raising the return on investments in the guild's training, especially for those already practicing, by creating an artificial scarcity of guild members. To the extent that a constraint on entrants to the guild actually increases the returns to guild members as opposed to ensuring competence, then the practice of limiting entrants to the field is a rent-seeking activity, and the excess return realized by the guild members is economic rent.
The same model explains the high wages in some modern professions that have been able to both obtain legal protection from competition and limit their membership, notably medical doctors, actuaries, and lawyers. In countries where the creation of new universities is limited by legal charter, such as the UK, it also applies to professors. It may also apply to careers that are inherently competitive in the sense that there is a fixed number of slots, such as football league positions, music charts, or urban territory for illegal drug selling. These jobs are characterised by the existence of a small number of rich members of the guild, along with a much larger surrounding of poor people competing against each other under very poor conditions as they "pay their dues" to try to join the guild. (Reference: "Freakonomics: Why do drug dealers live with their Moms?").
Santa Monica's residents were being afforded too many choices... a population of 84,000 was served by 454 licensed taxis... City experts settled on a franchise system: Competition would be limited to five cab companies. The total number of taxis would be fixed at around 200. The biggest losers, besides the Santa Monica residents who had a tougher time finding a taxi, were the single proprietors who'd bought taxis and earned their livings in the city only to be told that they were no longer welcome there.