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Key money is an upfront payment made by a tenant to a landlord, or sometimes to a departing tenant, to secure a lease for a desirable property. The payment is separate from rent and security deposit. Whether it is legal depends entirely on where you are and what type of property is involved. In commercial real estate across many markets, it is an accepted and documented practice. In residential real estate across the United States, it is generally illegal.
In commercial real estate, key money is most common in competitive retail, restaurant, and hospitality locations. A restaurant operator, for example, might pay key money to take over a commercial kitchen that a previous tenant built out and left behind. The payment compensates the landlord for granting access to an improved space that is worth more than an empty shell.
In residential markets, key money takes a different, shadier form. It is the informal payment a prospective tenant makes to a landlord, building manager, or superintendent to jump the queue for a desirable rent-stabilized apartment. New York State explicitly makes this illegal under its rent gouging statutes, and similar prohibitions exist in many other states.
Key money appears most reliably in markets where demand exceeds supply and landlords hold the leverage. Tokyo is the canonical example. Japan's post-World War II housing shortage created a custom called reikin, a gift payment to the landlord equal to one to three months of rent, not refundable, and entirely separate from the security deposit.
Corporate Finance Institute describes a scenario where a prospective tenant in a tight market offers key money to the landlord to outcompete other applicants for the same space. In this context, key money functions like a one-time premium for access to a resource in short supply.
In commercial leases, key money that is not disclosed and documented in the lease agreement creates legal risk on both sides. Barnes Walker, a Florida real estate firm, notes that Florida courts will enforce key money agreements that are lawful, voluntary, and documented, but undisclosed payments may violate state real estate licensing and consumer protection laws.
Any commercial key money payment should appear explicitly in the lease, state the amount, the purpose, and whether it is refundable. An undocumented side payment, even for a legitimate purpose, invites dispute and potential regulatory exposure.
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